Abstract

A golf ball includes a core and a cover, in which the core is formed of a rubber composition in a single layer, the cover is formed of a resin composition, a hardness profile of the core has a specific cross-sectional hardness profile, and letting a deflection (mm) when the core is compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf) be C (mm), a Shore C hardness at a core center be H0, and a Shore C hardness at a core surface be H100, the following condition is satisfied: A golf ball includes a core and a cover, in which the core is formed of a rubber composition in a single layer, the cover is formed of a resin composition, a hardness profile of the core has a specific cross-sectional hardness profile, and letting a deflection (mm) when the core is compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf) be C (mm), a Shore C hardness at a core center be H0, and a Shore C hardness at a core surface be H100, the following condition is satisfied: C × ( H 100 - H 0 ) ≥ 1 ⁢ 2 ⁢ 5 . 0 .

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

A multi-piece solid golf ball includes a core, a surrounding layer, an intermediate layer, and a cover, in which a large number of dimples are formed on an outside surface of the cover, a relationship of surface hardnesses of each sphere is specified, an initial velocity of the ball is set to 75.0 to 77.724 m/s, and a relationship of a ratio to a lift coefficient/drag coefficient at a Reynolds number of 218,000 and a spin rate of 2,800 rpm, a lift coefficient/drag coefficient at a Reynolds number of 184,000 and a spin rate of 2,900 rpm, and a lift coefficient/drag coefficient at a Reynolds number of 158,000 and a spin rate of 3,100 rpm is specified.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

A multi-piece solid golf ball includes a core, an intermediate layer, and a cover, in which a large number of dimples are formed on an outside surface of the cover, a relationship between a surface hardness of an intermediate layer-encased sphere and a surface hardness of the ball is specified, an initial velocity of the ball is set from 76.0 to 77.724 m/s, a relationship of a ratio to a lift coefficient/drag coefficient at a Reynolds number of 218,000 and a spin rate of 2,800 rpm, a lift coefficient/drag coefficient at a Reynolds number of 184,000 and a spin rate of 2,900 rpm, and a lift coefficient/drag coefficient at a Reynolds number of 158,000 and a spin rate of 3,100 rpm is specified, and a volume occupancy ratio of the dimples is set within a predetermined range.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

In a golf ball including a core, an intermediate layer, and a cover, the relationship of the surface hardness between an intermediate layer-encased sphere and the ball satisfies a predetermined relational expression, and with an initial velocity of the ball and a deflection under a predetermined load applied to the ball optimized, and letting a value of (initial velocity of core×weight of core) be Ciw, a value of [(initial velocity of intermediate layer-encased sphere—initial velocity of core)×(weight of intermediate layer-encased sphere−weight of core)] be Miw, and a value of [(initial velocity of ball−initial velocity of intermediate layer-encased sphere)×(weight of ball−weight of intermediate layer-encased sphere)] be CViw, the expression of Ciw+Miw+CViw is optimized, and a volume occupancy ratio VR of the dimples is set within a predetermined range.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

Provided is a golf ball including a core, an intermediate layer, and a cover. A relationship between surface hardnesses of an intermediate layer-encased sphere and the ball satisfies a predetermined relational expression. With a ball initial velocity and a deflection under a predetermined load applied to the ball optimized, and letting a value of (initial velocity of core×weight of core) be Ciw, a value of [(initial velocity of intermediate layer-encased sphere−initial velocity of core)×(weight of intermediate layer-encased sphere−weight of core)] be Miw, and a value of [(initial velocity of ball−initial velocity of intermediate layer-encased sphere)×(weight of ball−weight of intermediate layer-encased sphere)] be CViw, the following condition is satisfied: Provided is a golf ball including a core, an intermediate layer, and a cover. A relationship between surface hardnesses of an intermediate layer-encased sphere and the ball satisfies a predetermined relational expression. With a ball initial velocity and a deflection under a predetermined load applied to the ball optimized, and letting a value of (initial velocity of core×weight of core) be Ciw, a value of [(initial velocity of intermediate layer-encased sphere−initial velocity of core)×(weight of intermediate layer-encased sphere−weight of core)] be Miw, and a value of [(initial velocity of ball−initial velocity of intermediate layer-encased sphere)×(weight of ball−weight of intermediate layer-encased sphere)] be CViw, the following condition is satisfied: 2500 ≤ Ciw + Miw + CViw ≤ 2650 , Provided is a golf ball including a core, an intermediate layer, and a cover. A relationship between surface hardnesses of an intermediate layer-encased sphere and the ball satisfies a predetermined relational expression. With a ball initial velocity and a deflection under a predetermined load applied to the ball optimized, and letting a value of (initial velocity of core×weight of core) be Ciw, a value of [(initial velocity of intermediate layer-encased sphere−initial velocity of core)×(weight of intermediate layer-encased sphere−weight of core)] be Miw, and a value of [(initial velocity of ball−initial velocity of intermediate layer-encased sphere)×(weight of ball−weight of intermediate layer-encased sphere)] be CViw, the following condition is satisfied: 2500 ≤ Ciw + Miw + CViw ≤ 2650 , wherein a total volume of the dimples is from 306 to 363 mm3.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

A golf ball includes a core and a cover, in which a large number of dimples are formed on an outside surface of the cover, the cover is formed using an ionomer resin as a chief material, an initial velocity of the ball is set within a predetermined range, a deflection when a predetermined load is applied to the ball is set within a predetermined range, a relationship of a ratio to a lift coefficient/drag coefficient at a Reynolds number of 218,000 and a spin rate of 2,800 rpm, a lift coefficient/drag coefficient at a Reynolds number of 184,000 and a spin rate of 2,900 rpm, and a lift coefficient/drag coefficient at a Reynolds number of 158,000 and a spin rate of 3,100 rpm is specified, and a volume occupancy ratio of the dimples is set within a predetermined range.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

A golf club head is of an iron type. The golf club head includes a face portion that includes a face surface configured to hit a ball, and score lines recessed from the face surface and extending in a toe-heel direction. A first region, a second region, and a third region are sequentially defined in the face surface located between the score lines next to each other. The first, second, and third regions are arranged in a direction perpendicular to the score lines. The first region includes first fine grooves recessed from the face surface and extending in the direction perpendicular to the score lines. The second region includes second fine grooves recessed from the face surface and extending in a direction oblique to the score lines. The third region includes third fine grooves recessed from the face surface and extending in the direction perpendicular to the score lines.

IPC Classes  ?

• A63B 53/04 - Heads

Abstract

In a golf ball having a core and a cover with numerous dimples thereon, the cover has a given material hardness, the ball has a specific compressive deformation when compressed under a given load, the outer surface of the cover has a paint coat thereon composed of an inner layer and an outer layer, the inner paint layer being formed of a coating composition containing specific base resins and the outer paint layer being formed of a two-part curable urethane coating composition which contains less than 5 wt % of an inorganic or organic filler based on the solids content of the base resins, and the paint layers have optimized ratios between their thicknesses at the dimple center and at the dimple edges. This golf ball satisfies the properties desired in practice golf balls, such as scratch resistance, peeling resistance and durability to cracking.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles
• C09D 133/04 - Homopolymers or copolymers of esters
• C09D 175/06 - Polyurethanes from polyesters

Abstract

A golf club head includes a head body that includes a face portion and a sole portion; a cavity that is provided in the head body and at a rear-surface side of the face portion; a fiber-reinforced resin layer that is disposed in the cavity and at a rear surface of the face portion; and a resin member that is disposed in the cavity, close to the sole portion, and at a rear surface of the fiber-reinforced resin layer. The resin member extends in a toe-heel direction.

IPC Classes  ?

• A63B 53/04 - Heads
• A63B 53/08 - Golf clubs with special arrangements for obtaining a variable impact

Abstract

In a golf ball having a rubber core and a cover of at least one layer encasing the core, at least one cover layer is formed of a resin composition that includes a thermoplastic polyurethane and an inorganic filler. The inorganic filler content is at least 5 parts by weight per 100 parts by weight of the thermoplastic polyurethane. The resin composition has an abrasion volume in the Taber abrasion test according to JIS-K 7311 of more than 0.003 cm3 and satisfies formula (1) below In a golf ball having a rubber core and a cover of at least one layer encasing the core, at least one cover layer is formed of a resin composition that includes a thermoplastic polyurethane and an inorganic filler. The inorganic filler content is at least 5 parts by weight per 100 parts by weight of the thermoplastic polyurethane. The resin composition has an abrasion volume in the Taber abrasion test according to JIS-K 7311 of more than 0.003 cm3 and satisfies formula (1) below 7 . 0 × 1 ⁢ 0 4 > ( η1 - η2 ) / H 3 , ( 1 ) In a golf ball having a rubber core and a cover of at least one layer encasing the core, at least one cover layer is formed of a resin composition that includes a thermoplastic polyurethane and an inorganic filler. The inorganic filler content is at least 5 parts by weight per 100 parts by weight of the thermoplastic polyurethane. The resin composition has an abrasion volume in the Taber abrasion test according to JIS-K 7311 of more than 0.003 cm3 and satisfies formula (1) below 7 . 0 × 1 ⁢ 0 4 > ( η1 - η2 ) / H 3 , ( 1 ) wherein H is the Shore D hardness and η1 and η2 are respectively the 210° C. and 220° C. melt viscosities (Pa·s) at a shear rate of 6,080 sec−1 when measured with a capillary rheometer in accordance with ISO 11443: 1995. The cover resin material has improved flowability when molded and improved trimmability after molding.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

A golf ball includes at least one intermediate layer formed between a core and a cover, wherein a standard deviation of a specific gravity of each layer of the core, the intermediate layer, the cover is within 0.07, and the cover is formed of a resin composition that includes the following components (I) and (II): (I) polyurethane (II) (meth)acrylic block copolymer, and the cover satisfies the following condition (1): A golf ball includes at least one intermediate layer formed between a core and a cover, wherein a standard deviation of a specific gravity of each layer of the core, the intermediate layer, the cover is within 0.07, and the cover is formed of a resin composition that includes the following components (I) and (II): (I) polyurethane (II) (meth)acrylic block copolymer, and the cover satisfies the following condition (1): 0.1 ≤ VR L × V ⁢ R H ≤ 0 . 2 ⁢ 6 ( 1 ) A golf ball includes at least one intermediate layer formed between a core and a cover, wherein a standard deviation of a specific gravity of each layer of the core, the intermediate layer, the cover is within 0.07, and the cover is formed of a resin composition that includes the following components (I) and (II): (I) polyurethane (II) (meth)acrylic block copolymer, and the cover satisfies the following condition (1): 0.1 ≤ VR L × V ⁢ R H ≤ 0 . 2 ⁢ 6 ( 1 ) [in the above condition, VRL represents a viscosity at 210° C. and a viscosity at 200° C. at a predetermined shear rate, and VRH represents a ratio between a viscosity η3 at 230° C. and a viscosity at 220° C. at the predetermined shear rate].

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

The present invention provides a golf ball in which dimples are formed on a ball surface, wherein when edge angles at points where depths are 10%, 20%, and 30% in a cross-section of one dimple are denoted as ED1, ED2, and ED3, respectively, dimples with a cross-sectional shape satisfying the following condition (1): The present invention provides a golf ball in which dimples are formed on a ball surface, wherein when edge angles at points where depths are 10%, 20%, and 30% in a cross-section of one dimple are denoted as ED1, ED2, and ED3, respectively, dimples with a cross-sectional shape satisfying the following condition (1): ED ⁢ 1 < ED ⁢ 2 > ED ⁢ 3 ( 1 ) The present invention provides a golf ball in which dimples are formed on a ball surface, wherein when edge angles at points where depths are 10%, 20%, and 30% in a cross-section of one dimple are denoted as ED1, ED2, and ED3, respectively, dimples with a cross-sectional shape satisfying the following condition (1): ED ⁢ 1 < ED ⁢ 2 > ED ⁢ 3 ( 1 ) account for at least 10% of a total number of the dimples, and further a ratio A1 of a lift coefficient at a Reynolds number of 218,000 and a spin rate of 2,800 rpm to a drag coefficient, a ratio A2 of a lift coefficient at a Reynolds number of 184,000 and a spin rate of 2,900 rpm to a drag coefficient, and a ratio A3 of a lift coefficient at a Reynolds number of 158,000 and a spin rate of 3,100 rpm to a drag coefficient are optimized.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

In a golf ball having a core and a cover of at least one layer encasing the core, the core is formed of a rubber composition which includes (a) a base rubber, (b) a co-crosslinking agent which is an α,β-unsaturated carboxylic acid and/or a metal salt thereof, (c) a filler, and (d) a crosslinking initiator, and the base rubber (a) has a polybutadiene content of at least 90 wt % and a syndiotactic 1,2-polybutadiene content of from 5 to 30 wt %, the amount of filler (c) included is from 6 to 14 vol % of the rubber composition, and the ball has a specific gravity of 1.0 or more and an initial velocity of 75 m/s or less, as the result of which the golf ball maintains a low rebound, undergoes little change in properties due to changes in temperature and has an excellent durability.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles
• C08K 5/13 - PhenolsPhenolates
• C08K 9/06 - Ingredients treated with organic substances with silicon-containing compounds
• C08L 9/00 - Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
• C08L 15/00 - Compositions of rubber derivatives
• C08L 75/04 - Polyurethanes

Abstract

In a golf ball having a core and a cover, the cover is formed of a resin composition made chiefly of a polyurethane resin having a crosslink density of at least 1.4×102 mol/m3 and not more than 35×102 mol/m3, so that the golf ball has an excellent controllability on approach shots and an excellent scuff resistance compared with golf balls having a conventional urethane cover.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

In a golf ball having a core and a cover of one or more layer, the core is formed of a material molded under heat from a rubber composition containing (a) a base rubber, (b) water and/or a lower alcohol having a specific molecular weight, (c) an α,β-unsaturated carboxylic acid and/or a metal salt thereof, and (d) an organic peroxide. In a golf ball having a core and a cover of one or more layer, the core is formed of a material molded under heat from a rubber composition containing (a) a base rubber, (b) water and/or a lower alcohol having a specific molecular weight, (c) an α,β-unsaturated carboxylic acid and/or a metal salt thereof, and (d) an organic peroxide. The base rubber (a) is a rubber obtained by mixing together (a-1) a polybutadiene and (a-2) an unneutralized ethylene-unsaturated carboxylic acid copolymer, and subsequently neutralizing the copolymer with (a-3) a metal oxide. Component (a-2) has a specific acid content and accounts for a specific portion of the combined amount of components (a-1) and (a-2). The difference in crosslink density between the core center and the core surface, expressed as (crosslink density of core surface)−(crosslink density of core center), is at least 5.0×102 mol/m3.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles
• C08L 9/00 - Compositions of homopolymers or copolymers of conjugated diene hydrocarbons

Abstract

A golf ball includes a core and a cover, in which the core is formed in a single layer of a rubber composition, the cover is formed of a resin composition, a hardness profile of the core has a specific cross-sectional hardness profile, and letting a deflection (mm) when the core is compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf) be C (mm), a Shore C hardness at a core center be Cc, and a Shore C hardness at a core surface be Cs, the following condition is satisfied: A golf ball includes a core and a cover, in which the core is formed in a single layer of a rubber composition, the cover is formed of a resin composition, a hardness profile of the core has a specific cross-sectional hardness profile, and letting a deflection (mm) when the core is compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf) be C (mm), a Shore C hardness at a core center be Cc, and a Shore C hardness at a core surface be Cs, the following condition is satisfied: C × ( Cs - Cc ) ≥ 1 ⁢ 3 ⁢ 2 . 0 .

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles
• C08K 3/30 - Sulfur-, selenium-, or tellurium-containing compounds
• C08K 5/14 - Peroxides

Abstract

The present invention provides a multi-piece solid golf ball including a core, a surrounding layer, an intermediate layer, and a cover, in which a large number of dimples are formed on an outside surface of the cover, the core is formed of a single layer or a plurality of layers of a rubber composition, the surrounding layer is formed of a single layer or a plurality of layers of a resin composition, the intermediate layer and the cover are both formed of a single layer of a resin composition, and a relationship between an initial velocity of an intermediate layer-encased sphere and an initial velocity of the ball satisfies the following condition: The present invention provides a multi-piece solid golf ball including a core, a surrounding layer, an intermediate layer, and a cover, in which a large number of dimples are formed on an outside surface of the cover, the core is formed of a single layer or a plurality of layers of a rubber composition, the surrounding layer is formed of a single layer or a plurality of layers of a resin composition, the intermediate layer and the cover are both formed of a single layer of a resin composition, and a relationship between an initial velocity of an intermediate layer-encased sphere and an initial velocity of the ball satisfies the following condition: (initial velocity of ball)<(initial velocity of intermediate layer-encased sphere). The present invention provides a multi-piece solid golf ball including a core, a surrounding layer, an intermediate layer, and a cover, in which a large number of dimples are formed on an outside surface of the cover, the core is formed of a single layer or a plurality of layers of a rubber composition, the surrounding layer is formed of a single layer or a plurality of layers of a resin composition, the intermediate layer and the cover are both formed of a single layer of a resin composition, and a relationship between an initial velocity of an intermediate layer-encased sphere and an initial velocity of the ball satisfies the following condition: (initial velocity of ball)<(initial velocity of intermediate layer-encased sphere). Further, a deflection of the ball under a predetermined load is optimized, and a lift coefficient and a drag coefficient at a predetermined Reynolds number and spin rate of the dimples are set within a predetermined range.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

In a golf ball having a rubber core of at least one layer and a cover of at least one layer encasing the core, at least one layer of the cover is formed of a resin composition that includes (I) a polyurethane or a polyurea and (II) an aromatic vinyl elastomer, the amount of component (II) included per 100 parts by weight of component (I) is less than 15 parts by weight, and the CS1 value calculated by formula (1) below In a golf ball having a rubber core of at least one layer and a cover of at least one layer encasing the core, at least one layer of the cover is formed of a resin composition that includes (I) a polyurethane or a polyurea and (II) an aromatic vinyl elastomer, the amount of component (II) included per 100 parts by weight of component (I) is less than 15 parts by weight, and the CS1 value calculated by formula (1) below C ⁢ S 1 = ( C ⁢ V 5 ⁢ 0 - C ⁢ V 1 ⁢ 2 ) / 38 ( 1 ) In a golf ball having a rubber core of at least one layer and a cover of at least one layer encasing the core, at least one layer of the cover is formed of a resin composition that includes (I) a polyurethane or a polyurea and (II) an aromatic vinyl elastomer, the amount of component (II) included per 100 parts by weight of component (I) is less than 15 parts by weight, and the CS1 value calculated by formula (1) below C ⁢ S 1 = ( C ⁢ V 5 ⁢ 0 - C ⁢ V 1 ⁢ 2 ) / 38 ( 1 ) (wherein CV50 is the coefficient of restitution at an incident velocity of 50.0 m/s and CV12 is the coefficient of restitution at an incident velocity of 12.0 m/s) is larger than −4.08×10−3, so that the golf ball has both an excellent controllability and a good feel at impact on approach shots together with a good scuff resistance.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles
• C08L 75/04 - Polyurethanes

Abstract

In a golf ball having a core and a cover of at least one layer encasing the core, at least one layer of the cover is formed of a resin composition which includes (I) a polyurethane or a polyurea, and (II) a core-shell polymer in which the core is a crosslinked acrylic rubber particle and the shell consists of an acrylic polymer, the amount of component (II) included per 100 parts by weight of component (I) is less than 15 parts by weight, and the CS1 value calculated by formula (1) below In a golf ball having a core and a cover of at least one layer encasing the core, at least one layer of the cover is formed of a resin composition which includes (I) a polyurethane or a polyurea, and (II) a core-shell polymer in which the core is a crosslinked acrylic rubber particle and the shell consists of an acrylic polymer, the amount of component (II) included per 100 parts by weight of component (I) is less than 15 parts by weight, and the CS1 value calculated by formula (1) below CS1=(CV50−CV12)/38  (1) In a golf ball having a core and a cover of at least one layer encasing the core, at least one layer of the cover is formed of a resin composition which includes (I) a polyurethane or a polyurea, and (II) a core-shell polymer in which the core is a crosslinked acrylic rubber particle and the shell consists of an acrylic polymer, the amount of component (II) included per 100 parts by weight of component (I) is less than 15 parts by weight, and the CS1 value calculated by formula (1) below CS1=(CV50−CV12)/38  (1) (wherein CV50 is the coefficient of restitution at an incident velocity of 50.0 m/s and CV12 is the coefficient of restitution at an incident velocity of 12.0 m/s) is larger than −4.08×10−3, thereby to have an excellent controllability, a good feel at impact on approach shots and a good scuff resistance.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

The present invention provides a golf ball in which a large number of dimples are formed on a ball surface, and when edge angles at points where depths are 10%, 20%, and 30% in a cross-section of one dimple are denoted by ED1, ED2, and ED3, respectively, dimples having a cross-sectional shape satisfying the following condition (1): The present invention provides a golf ball in which a large number of dimples are formed on a ball surface, and when edge angles at points where depths are 10%, 20%, and 30% in a cross-section of one dimple are denoted by ED1, ED2, and ED3, respectively, dimples having a cross-sectional shape satisfying the following condition (1): ED1ED3  (1) The present invention provides a golf ball in which a large number of dimples are formed on a ball surface, and when edge angles at points where depths are 10%, 20%, and 30% in a cross-section of one dimple are denoted by ED1, ED2, and ED3, respectively, dimples having a cross-sectional shape satisfying the following condition (1): ED1ED3  (1) account for at least 10% of a total number of the dimples.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

In a golf ball having a core, a cover and at least one intermediate layer formed therebetween, the core, intermediate layer and cover have respective specific gravities with a standard deviation of not more than 0.07 or less, the cover has a material hardness on the Shore D hardness scale of 52 or less, and the ball has a deflection when compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf) which is 2.8 mm or less. The amount of deviation in the ball center of gravity is exceedingly small, increasing the straightness with which the ball rolls on putts with a putter.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

The present invention provides a golf ball including a two-layer core having an inner layer core and an outer layer core, an intermediate layer, and a cover, in which a large number of dimples are formed on an outer surface of the cover, and a relationship between a surface hardness of an intermediate layer-encased sphere and a ball surface hardness satisfies the following condition: The present invention provides a golf ball including a two-layer core having an inner layer core and an outer layer core, an intermediate layer, and a cover, in which a large number of dimples are formed on an outer surface of the cover, and a relationship between a surface hardness of an intermediate layer-encased sphere and a ball surface hardness satisfies the following condition: (ball surface hardness)< (surface hardness of intermediate layer-encased sphere) (where hardness means Shore D hardness). The present invention provides a golf ball including a two-layer core having an inner layer core and an outer layer core, an intermediate layer, and a cover, in which a large number of dimples are formed on an outer surface of the cover, and a relationship between a surface hardness of an intermediate layer-encased sphere and a ball surface hardness satisfies the following condition: (ball surface hardness)< (surface hardness of intermediate layer-encased sphere) (where hardness means Shore D hardness). Further, a value obtained by subtracting a center hardness of the entire core from a surface hardness of the entire core is at least 25 on the Shore C hardness scale, and a lift coefficient and a drag coefficient at a predetermined Reynolds number and spin rate of the dimples are set within a predetermined range.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

The present invention provides a multi-piece solid golf ball including a core, an intermediate layer, and a cover, in which a large number of dimples are formed on an outside surface of the cover, and a relationship between a cover material hardness and a midpoint hardness (Cm) between a core surface and a core center satisfies the following condition: The present invention provides a multi-piece solid golf ball including a core, an intermediate layer, and a cover, in which a large number of dimples are formed on an outside surface of the cover, and a relationship between a cover material hardness and a midpoint hardness (Cm) between a core surface and a core center satisfies the following condition: midpoint hardness (Cm) between core surface and core center>cover material hardness where hardness means Shore C hardness. The present invention provides a multi-piece solid golf ball including a core, an intermediate layer, and a cover, in which a large number of dimples are formed on an outside surface of the cover, and a relationship between a cover material hardness and a midpoint hardness (Cm) between a core surface and a core center satisfies the following condition: midpoint hardness (Cm) between core surface and core center>cover material hardness where hardness means Shore C hardness. Further, a surface hardness of the ball is optimized, a deflection of the ball when compressed under a predetermined load is optimized, and a lift coefficient and a drag coefficient at a predetermined Reynolds number and spin rate of the dimples are set within a predetermined range.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

A golf club head is hollow and has a volume of from 400 cc through 460 cc. The golf club head includes a body portion including a carbon fiber-reinforced plastic; a face portion including a face surface that is to be a striking surface; a weight member attached to the body portion; and a screw that fastens the weight member. The body portion includes a sole portion, a crown portion, a side portion, and a back portion. The weight member is disposed at an outer-surface side of the back portion and fastened with the screw from an inner-surface side of the back portion. The weight member forms a part of an outer shape of the golf club head.

IPC Classes  ?

• A63B 53/04 - Heads

Abstract

A golf club head includes a first groove formed in a face portion of the head, and a second groove formed in the face portion and intersecting the first groove. A first protrusion is formed along an edge of the first groove. A second protrusion is formed along an edge of the second groove. A third protrusion is formed at an edge of an intersection between the first groove and the second groove, the third protrusion being higher than the first protrusion and the second protrusion.

IPC Classes  ?

• A63B 53/04 - Heads

Abstract

A multi-piece solid golf ball includes a core, an intermediate layer, and a cover, in which the core is formed of a rubber composition, the intermediate layer and the cover are formed of a single-layer resin composition, and a relationship among an initial velocity of the core, an initial velocity of an intermediate layer-encased sphere, and an initial velocity of a sphere (ball) obtained by encasing the intermediate layer-encased sphere with the cover satisfies (ball initial velocity)<(initial velocity of intermediate layer-encased sphere) and 0.60≤(initial velocity of intermediate layer-encased sphere)−(core initial velocity)≤0.90 (m/s). When each sphere of the core and the ball is compressed under a specific load and deflections are denoted by C (mm) and B (mm), respectively, a value of C−B is not more than 1.10 mm, and 0.024≤(intermediate layer thickness)/(ball diameter)≤0.034 is satisfied.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

The present invention is a method for manufacturing a golf ball including a core, at least one intermediate layer, and a cover, the core being formed of a rubber material, the intermediate layer being formed of a resin composition, and the cover being formed of a urethane resin material, the method including: a step (1) of forming an intermediate layer-encased sphere by encasing the core with the at least one intermediate layer; a step (2) of subjecting the intermediate layer-encased sphere to a heat treatment at a temperature of at least a melting point of a base resin of the resin composition of the intermediate layer and less than 160° C.; and a step (3) of thereafter forming a cover-encased sphere by encasing the intermediate layer- encased sphere with the cover.

IPC Classes  ?

• B29C 45/14 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mouldApparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
• B29C 45/16 - Making multilayered or multicoloured articles
• B29C 45/72 - Heating or cooling
• B29K 75/00 - Use of polyureas or polyurethanes as moulding material
• B29K 96/00 - Use of specified macromolecular materials not provided for in a single one of main groups , as moulding material
• B29L 31/54 - Balls

Abstract

A method for manufacturing a golf ball having a core and a cover of at least one layer includes the step of molding the cover layer with a vertically separating two-part injection mold which has a spherical cavity and three or more support pins disposed so as to be capable of advancing and retracting in a direction perpendicular to a mold parting line, each support pin being housing in a pin housing hole having a nitrided inner peripheral sidewall. This method enables a golf ball cover material to be molded using an injection mold which, because a thick plating of hard chrome does not need to be applied to the inner peripheral sidewalls of the holes housing the support pins, is inexpensive and in which the pin housing holes have a good abrasion resistance.

IPC Classes  ?

• B29C 33/56 - CoatingsReleasing, lubricating or separating agents
• B29C 45/14 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mouldApparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
• B29C 45/16 - Making multilayered or multicoloured articles
• B29C 45/37 - Mould cavity walls
• B29K 75/00 - Use of polyureas or polyurethanes as moulding material
• B29K 609/00 - Use of rubber derived from conjugated dienes, for preformed parts, e.g. for inserts
• B29L 31/54 - Balls

Abstract

In a golf ball having a core composed of one or more layer, the outermost layer of the core is formed of a rubber composition containing an α,β-unsaturated metal carboxylate, and an envelope layer directly encasing the core is formed of a resin composition containing a thermoplastic resin having a structure that includes α,β-ethylenically unsaturated carboxylic acid copolymerization units. The infrared absorption spectra at surface sites on the outermost layer of the core, as measured by ATR FT-IR spectroscopy, satisfy a specific condition. The ball has an enhanced adhesion between the rubber-based core and the adjacent cover layer that is formed of an ionomer resin or other α,β-ethylenically unsaturated carboxylic acid copolymer-containing resin material.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

In a golf ball having a rubber core of at least one layer and a cover of at least one layer encasing the core, at least one layer of the cover is formed of a resin composition that includes (I) a polyurethane or a polyurea and (II) a (meth)acrylic block copolymer, and the CS1 value calculated by formula (1) below In a golf ball having a rubber core of at least one layer and a cover of at least one layer encasing the core, at least one layer of the cover is formed of a resin composition that includes (I) a polyurethane or a polyurea and (II) a (meth)acrylic block copolymer, and the CS1 value calculated by formula (1) below CS 1 = ( CV 50 - CV 12 ) / 38 ( 1 ) In a golf ball having a rubber core of at least one layer and a cover of at least one layer encasing the core, at least one layer of the cover is formed of a resin composition that includes (I) a polyurethane or a polyurea and (II) a (meth)acrylic block copolymer, and the CS1 value calculated by formula (1) below CS 1 = ( CV 50 - CV 12 ) / 38 ( 1 ) (wherein CV50 is the coefficient of restitution at an incident velocity of 50.0 m/s and CV12 is the coefficient of restitution at an incident velocity of 12.0 m/s) is larger than −4.08×10−3. The golf ball has an excellent controllability on approach shots and is able to maintain a good scuff resistance and moldability.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles
• C08L 75/04 - Polyurethanes

Abstract

Provided is a golf ball including a core, an intermediate layer, and a cover. A relationship between surface hardnesses of an intermediate layer-encased sphere and the ball satisfies a predetermined relational expression. With a ball initial velocity and a deflection under a predetermined load applied to the ball optimized, and letting a value of (initial velocity of core×weight of core) be Ciw, a value of [(initial velocity of intermediate layer-encased sphere−initial velocity of core)×(weight of intermediate layer-encased sphere−weight of core)] be Miw, and a value of [(initial velocity of ball−initial velocity of intermediate layer-encased sphere)×(weight of ball−weight of intermediate layer-encased sphere)] be CViw, the following condition is satisfied: 2650. Lift coefficients and drag coefficients at predetermined Reynolds numbers and spin rates are set to predetermined ranges.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

An information processing method includes extracting key points related to golf swing motion of a human subject from each of images in a video. The information processing method includes acquiring data representing motion of both the human subject and a golf club in each of the images, based on the key points, the data including data related to at least one of positions, or velocities, of both a body part of the human subject and the golf club. The information processing method includes estimating a timing of a predetermined event in the video based on a similarity between the data acquired for each of the images and reference data representing motion of a person and the golf club, upon occurrence of a condition in which the predetermined event in the golf swing motion occurs.

IPC Classes  ?

• G06V 20/40 - ScenesScene-specific elements in video content
• G06V 40/20 - Movements or behaviour, e.g. gesture recognition

Abstract

thereby to have a superior distance on full shots with clubs from a driver to an iron, good durability on repeated impact, and good controllability in the short game when used by amateur users who are advanced players.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

A golf ball includes a core, an intermediate layer, and a cover, in which an initial velocity is not more than 76.0 m/s, a deflection when the ball is compressed under a specific load is at least 2.8 mm, and letting a value of (initial velocity of core×weight of core) be Ciw, a value of [(initial velocity of intermediate layer-encased sphere−initial velocity of core)×(weight of intermediate layer-encased sphere−weight of core)] be Miw, and a value of [(initial velocity of ball−initial velocity of intermediate layer-encased sphere)×(weight of ball−weight of intermediate layer-encased sphere)] be CViw, the condition is of Ciw+Miw+CViw≤2,550 is satisfied, thereby to be capable of making a distance for reducing a distance on shots with a driver and an iron by average hitters smaller.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles
• C08L 9/06 - Copolymers with styrene

Abstract

A golf club head includes a body; a face; and a crown. The body includes a crown opening; a beam dividing the crown opening; and a sole. The face includes a front surface that strikes a ball; and a back surface. The crown closes the crown opening. The sole has a butting structure that contacts the back surface of the face at a contact portion. As viewed in a crown-sole direction, a length from a face toe end to a face heel end in a toe-heel direction is set as a face length, and each of a toe edge and a heel edge of the beam and the contact portion is arranged within a 15% range of the face length in the toe-heel direction from an imaginary straight line extending in a face-back direction and through a center of the face length.

IPC Classes  ?

• A63B 53/04 - Heads
• A63B 53/06 - Heads adjustable

Abstract

The present invention provides a golf ball in which at least one intermediate layer is formed between a core and a cover, wherein an L value (brightness) of the core is not more than 85 in a Lab display based on JIS Z 8722, an L value (brightness) of a sphere (intermediate layer-encased sphere) obtained by encasing the core with the intermediate layer is at least 75 in the Lab display based on JIS Z 8722, a total light transmittance of the intermediate layer at a thickness of 1.0 mm is 1 to 50%, and a color difference ΔE between the core and the intermediate layer-encased sphere is at least 10.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

A rubber composition for golf balls includes (a) a base rubber, relative amounts of (b) a co-crosslinking agent which is an α,β-unsaturated carboxylic acid and/or a metal salt thereof and of (c) an organic peroxide that together satisfy a specific condition, and (d) a specific amount of a moisture-providing agent, the latter being a substance which includes on the structure thereof a water constituent other than free water and eliminates moisture under heating or a substance which thermally decomposes under heating, releasing a water constituent. When the hardness difference in the internal hardness profile of a golf ball core made of the composition is large, the ball exhibits a low spin rate on shots, improving the flight performance of the ball, and the durability of the ball to cracking is enhanced.

IPC Classes  ?

• C08L 9/00 - Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
• C08K 5/098 - Metal salts of carboxylic acids
• C08K 5/14 - Peroxides
• C08K 5/37 - Thiols

Abstract

A golf ball includes one or more coating layer on a golf ball surface having a plurality of dimples thereon. At least one coating layer is formed of a two-component curable urethane coating composition having a polyol component and a polyisocyanate component, which polyol component is an acrylic polyol or a polyester polyol. The coating composition contains less than 5 wt % of polyurethane particles, relative to base resin solids within the composition. The coating layer formed on the ball surface suppresses coating sag, improves the film thickness edge ratio between the film thickness at the middle portion and the film thickness at edge portions of the dimples, and has an improved scuff resistance, peel resistance and marking protective effect.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles
• C09D 7/65 - Additives macromolecular
• C09D 175/04 - Polyurethanes

Abstract

In a golf ball having a core and a cover of one or more layer, the core is a product molded under heat from a rubber composition which includes (a) a base rubber, (b) a co-crosslinking agent which is an α,β-unsaturated carboxylic acid and/or a metal salt thereof, (c) an organic peroxide, and (d) water, wherein the content of component (d) is set within a specific range and components (b) and (c) are included in relative amounts that satisfy a specific condition. The core has a specific compressive deformation and a specific hardness difference between the center and surface thereof. Owing to the large hardness difference in the internal hardness profile of the core, the ball exhibits low spin characteristics when hit, improving the flight performance, yet retains a good durability to impact.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles
• C08K 5/09 - Carboxylic acidsMetal salts thereofAnhydrides thereof
• C08K 5/14 - Peroxides
• C08K 5/378 - Sulfides containing heterocyclic rings
• C08L 9/00 - Compositions of homopolymers or copolymers of conjugated diene hydrocarbons

Abstract

A rubber composition for golf balls is provided which, when the hardness difference in the internal hardness profile of a golf ball core made of the composition is set to a large value, enables the ball to exhibit low spin characteristics when hit, improving the flight performance of the ball, and also enhances the ball durability to cracking. The rubber composition includes (a) a base rubber, (b) a co-crosslinking agent that is an α,⊕-unsaturated carboxylic acid and/or a metal salt thereof, (c) an organic peroxide and (d) water, component (d) being included in an amount of from 0.1 to 10 parts by weight per 100 parts by weight of component (a), and components (b) and (c) being included in relative amounts such that E, defined by the formula A rubber composition for golf balls is provided which, when the hardness difference in the internal hardness profile of a golf ball core made of the composition is set to a large value, enables the ball to exhibit low spin characteristics when hit, improving the flight performance of the ball, and also enhances the ball durability to cracking. The rubber composition includes (a) a base rubber, (b) a co-crosslinking agent that is an α,⊕-unsaturated carboxylic acid and/or a metal salt thereof, (c) an organic peroxide and (d) water, component (d) being included in an amount of from 0.1 to 10 parts by weight per 100 parts by weight of component (a), and components (b) and (c) being included in relative amounts such that E, defined by the formula E=molar amount of component (b)/molar amount of active oxygens in component (c), has a value of 93 or more.

IPC Classes  ?

• C08L 9/00 - Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
• A63B 37/00 - Solid ballsMarbles
• C08K 5/098 - Metal salts of carboxylic acids
• C08K 5/13 - PhenolsPhenolates
• C08K 5/14 - Peroxides
• C08K 5/372 - Sulfides
• C08K 5/375 - Sulfides containing six-membered aromatic rings
• C08K 5/378 - Sulfides containing heterocyclic rings

Abstract

The present invention provides a rubber composition for golf balls which includes (a) a base rubber, (b) a co-crosslinking agent being an α,β-unsaturated carboxylic acid and/or a metal salt thereof, (c) a crosslinking initiator and (d) a specific amount of an anionic surfactant, so that the rubber composition reduces sticking of a molded rubber material made therefrom to the mold and also maintains the resilience and other properties of the molded rubber material.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles
• C08F 36/06 - Butadiene
• C08K 5/098 - Metal salts of carboxylic acids
• C08K 5/42 - Sulfonic acidsDerivatives thereof

Abstract

In a golf ball including a core, an intermediate layer, and a cover, the relationship of the surface hardness between an intermediate layer-encased sphere and the ball satisfies a predetermined relational expression, and with an initial velocity of the ball and a deflection under a predetermined load applied to the ball optimized, and letting a value of (initial velocity of core×weight of core) be Ciw, a value of [(initial velocity of intermediate layer-encased sphere−initial velocity of core)×(weight of intermediate layer-encased sphere−weight of core)] be Miw, and a value of [(initial velocity of ball−initial velocity of intermediate layer-encased sphere)×(weight of ball−weight of intermediate layer-encased sphere)] be CViw, the expression of Ciw+Miw+CViw is optimized, and lift and drag coefficients at predetermined Reynolds numbers and spin rates of dimples are set to predetermined ranges.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

Ciw+Miw+CViw≤2650. A volume occupancy ratio of dimples is set to a predetermined range.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

The core has a diameter of from 35.5 to 39.5 mm and a distinctive hardness profile that satisfies specific conditions. The ball is endowed with both an excellent flight performance and excellent durability to repeated impact.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

A method is provided for manufacturing golf balls having markings of excellent definition and durability printed on the surface thereof. The method includes the steps of: (1) applying at least one treatment selected from the group consisting of corona discharge treatment, ultraviolet irradiation treatment, chlorine treatment and primer coating treatment to the surface of a golf ball; (2) forming a sublayer at a place on the treated surface of the golf ball that corresponds to the marking; and (3) forming the marking on the sublayer by inkjet printing.

IPC Classes  ?

• A63B 45/02 - Marking of balls
• B41J 3/407 - Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material

Abstract

A golf ball made up of components such as a coating layer, a cover layer, an intermediate layer and a core includes, within such a component, a material that contains a phase-change material. The phase-change material is preferably normal paraffin having a melting point of between 5° C. and 40° C. and is preferably used in the form of microcapsules. This golf ball suppresses changes in the ball temperature itself in response to changes in the ambient air temperature during use of the ball, enabling the optimal properties that have been designed into the ball to be maintained.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

The image processing device comprises: a position identification section for identifying positions of two reference points and a position of physical characteristic point of the subject in the moving image; an angle acquisition section for obtaining an angle of a line segment connecting the two reference points with respect to the image plane; a conversion ratio calculation section for calculating a conversion ratio indicating a ratio between the length in the moving image and the length in real space; and a coordinate calculation section for calculating position coordinates of at least one of: the two reference points and the physical characteristic point of the subject in the image plane in the real space, based on the calculated conversion ratio and at least one of: the identified positions of the two reference points and the identified position of the physical characteristic point of the subject.

IPC Classes  ?

• G06T 7/73 - Determining position or orientation of objects or cameras using feature-based methods
• A63B 24/00 - Electric or electronic controls for exercising apparatus of groups
• G06T 7/60 - Analysis of geometric attributes

Abstract

and a specific gravity of the intermediate layer and a deflection of the golf ball when compressed under a predetermined load are set within specific ranges.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles
• C08K 13/02 - Organic and inorganic ingredients

Goods & Services

Golf balls

Abstract

In a golf ball having a core, an intermediate layer and a cover, the ball and the sphere obtained by encasing the core with the intermediate layer have respective surface hardnesses such that (surface hardness of ball)<(surface hardness of intermediate layer-encased sphere); the ball has an initial velocity of ≤75.0 m/s; and the core has a hardness profile in which the center hardness, the hardness at a midpoint between the core center and core surface, and the hardnesses at specific positions inward from the midpoint and at specific positions outward from the midpoint are optimized. Given the possibility that the rules limiting the distance traveled by a golf ball on shots by long hitters will change, this ball reduces the drop-off in distance on driver shots and iron shots taken by average hitters while increasing the drop-off in distance on driver shots taken by long hitters.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles
• C08L 9/06 - Copolymers with styrene

Abstract

In a multi-piece solid golf ball having a core, an intermediate layer encasing the core and a cover which encases the intermediate layer and has numerous dimples on an outside surface thereof, the intermediate layer is formed of a resin material comprising an ionomer resin as a base resin and an inorganic granular filler, the cover is formed of a urethane resin material, the core has a diameter of at least 38.0 mm, the core has specific deflection, the sphere obtained by encasing the core with the intermediate layer (intermediate layer-encased sphere) has a surface hardness on the Shore D hardness scale of at least 69, the ball has a surface hardness on the Shore D hardness scale of 62 or less, and the (intermediate layer thickness)/(core diameter) value is from 0.025 to 0.043, the (cover thickness)/(core diameter) value is from 0.014 to 0.027.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

The golf ball includes a core, an intermediate layer, and a cover, in which the core is formed of a rubber composition into a single layer or a plurality of layers, the intermediate layer and the cover are both formed of a single-layer resin composition, and a relationship between an initial velocity of the core, an initial velocity of a sphere (intermediate layer-encased sphere) in which the core is encased with the intermediate layer, and an initial velocity of a sphere (ball) in which the intermediate layer-encased sphere is encased with the cover satisfies the following two conditions: The golf ball includes a core, an intermediate layer, and a cover, in which the core is formed of a rubber composition into a single layer or a plurality of layers, the intermediate layer and the cover are both formed of a single-layer resin composition, and a relationship between an initial velocity of the core, an initial velocity of a sphere (intermediate layer-encased sphere) in which the core is encased with the intermediate layer, and an initial velocity of a sphere (ball) in which the intermediate layer-encased sphere is encased with the cover satisfies the following two conditions: (initial velocity of ball)<(initial velocity of intermediate layer-encased sphere) The golf ball includes a core, an intermediate layer, and a cover, in which the core is formed of a rubber composition into a single layer or a plurality of layers, the intermediate layer and the cover are both formed of a single-layer resin composition, and a relationship between an initial velocity of the core, an initial velocity of a sphere (intermediate layer-encased sphere) in which the core is encased with the intermediate layer, and an initial velocity of a sphere (ball) in which the intermediate layer-encased sphere is encased with the cover satisfies the following two conditions: (initial velocity of ball)<(initial velocity of intermediate layer-encased sphere) 0.60≤(initial velocity of intermediate layer-encased sphere)−(initial velocity of core)≤1.00 (m/s). and the specific deflection is 3.00 mm or less, and a specific gravity of the intermediate layer is 1.05 or more.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

This golf ball can achieve a superior distance on shots with a utility club and with irons, and exhibits a good durability to repeated impact, a good controllability in the short game and a good feel at impact.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles
• C08F 279/02 - Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group on to polymers of conjugated dienes
• C08L 33/08 - Homopolymers or copolymers of acrylic acid esters

Abstract

In a golf ball having a core, an intermediate layer and a cover, the core is formed of a rubber composition and the intermediate layer and the cover are each formed of a resin composition. The core, the intermediate layer-encased sphere and the ball have respective initial velocities which together satisfy the following two conditions: In a golf ball having a core, an intermediate layer and a cover, the core is formed of a rubber composition and the intermediate layer and the cover are each formed of a resin composition. The core, the intermediate layer-encased sphere and the ball have respective initial velocities which together satisfy the following two conditions: (initial velocity of ball)<(initial velocity of intermediate layer-encased sphere), In a golf ball having a core, an intermediate layer and a cover, the core is formed of a rubber composition and the intermediate layer and the cover are each formed of a resin composition. The core, the intermediate layer-encased sphere and the ball have respective initial velocities which together satisfy the following two conditions: (initial velocity of ball)<(initial velocity of intermediate layer-encased sphere), 0.65≤(initial velocity of intermediate layer-encased sphere)−(initial velocity of core)≤1.15 m/s. In a golf ball having a core, an intermediate layer and a cover, the core is formed of a rubber composition and the intermediate layer and the cover are each formed of a resin composition. The core, the intermediate layer-encased sphere and the ball have respective initial velocities which together satisfy the following two conditions: (initial velocity of ball)<(initial velocity of intermediate layer-encased sphere), 0.65≤(initial velocity of intermediate layer-encased sphere)−(initial velocity of core)≤1.15 m/s. Also, letting C and B be the respective deflections in millimeters of the core and the ball when compressed under a specific load, the value of C−B is 1.20 mm or more. This golf ball can achieve a superior distance on shots with a utility club and on shots with irons, and exhibits a good durability to repeated impact and a good controllability in the short game.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

A golf club head having a volume of from 400 cc through 460 cc includes: a face portion that includes a face surface that is to be a striking surface; and a body portion that includes carbon fiber-reinforced plastics. The body portion includes a sole portion, a crown portion, and a weight member attached to the sole portion at an inner-surface side thereof. The weight member includes a first weight member that is disposed directly below a center of gravity of the golf club head, and a second weight member that extends from the first weight member in a toe-heel direction.

IPC Classes  ?

• A63B 53/06 - Heads adjustable
• A63B 53/04 - Heads

Abstract

An information processing apparatus includes an acquisition unit configured to acquire a video of a swing of a golfer who strikes a golf ball with a golf club, a calculation unit configured to calculates a feature amount of the swing from the video, and a conversion unit configured to convert the feature amount into an estimated value of a behavior of a golf club head by substituting the feature amount into a conversion formula.

IPC Classes  ?

• A63B 24/00 - Electric or electronic controls for exercising apparatus of groups

Abstract

A golf ball of the present invention includes a core and a cover located outside the core and having a plurality of dimples on a surface thereof. A bottom of each of the dimples has a curved shape protruding toward an outside of the golf ball, and the protruding portion has a spherical crown shape having a radius of curvature R of 20 to 50 mm. A depth d of a center protruding portion of the bottom of the dimple is a perpendicular distance between a line S connecting both ends of an outer periphery of the dimple and a highest point of the protruding portion. A volume occupation ratio VR of the dimple is less than 0.75. A relationship between Shore D hardness H of a material of the cover and the depth d (unit: mm) satisfies the following Formula 1: A golf ball of the present invention includes a core and a cover located outside the core and having a plurality of dimples on a surface thereof. A bottom of each of the dimples has a curved shape protruding toward an outside of the golf ball, and the protruding portion has a spherical crown shape having a radius of curvature R of 20 to 50 mm. A depth d of a center protruding portion of the bottom of the dimple is a perpendicular distance between a line S connecting both ends of an outer periphery of the dimple and a highest point of the protruding portion. A volume occupation ratio VR of the dimple is less than 0.75. A relationship between Shore D hardness H of a material of the cover and the depth d (unit: mm) satisfies the following Formula 1: (H−78)/(−300)>d  (Formula 1).

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

In a golf ball having a rubber core of at least one layer and a cover of at least one layer that encases the core, at least one layer of the cover is formed of a resin composition which includes (A) a polyurethane or a polyurea, (B) an alkyl methacrylate/alkyl acrylate copolymer, and (C) a fatty acid amide. The golf ball has an excellent mold releasability during molding of the cover while retaining a good spin rate on approach shots, scuff resistance and paint film durability.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

In a golf ball for professional golfers and skilled amateurs which has a single-layer core, a cover and at least one intermediate layer therebetween, the sphere obtained by encasing the core with the intermediate layer (intermediate layer-encased sphere) and the ball have a surface hardness relationship therebetween which satisfies the condition: In a golf ball for professional golfers and skilled amateurs which has a single-layer core, a cover and at least one intermediate layer therebetween, the sphere obtained by encasing the core with the intermediate layer (intermediate layer-encased sphere) and the ball have a surface hardness relationship therebetween which satisfies the condition: (surface hardness of intermediate layer-encased sphere)>(surface hardness of ball). In a golf ball for professional golfers and skilled amateurs which has a single-layer core, a cover and at least one intermediate layer therebetween, the sphere obtained by encasing the core with the intermediate layer (intermediate layer-encased sphere) and the ball have a surface hardness relationship therebetween which satisfies the condition: (surface hardness of intermediate layer-encased sphere)>(surface hardness of ball). Moreover, the core has a diameter of from 35.5 to 39.5 mm and a unique hardness profile that satisfies certain specific conditions. This ball is endowed with both an excellent flight performance and a good durability to repeated impact.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles
• C08K 13/02 - Organic and inorganic ingredients

Abstract

A golf ball having a single-layer rubber core, a single-layer resin cover and one intermediate layer therebetween satisfies the following conditions: A golf ball having a single-layer rubber core, a single-layer resin cover and one intermediate layer therebetween satisfies the following conditions: (Shore C hardness at surface of intermediate layer-encased sphere)>(Shore C hardness at ball surface), A golf ball having a single-layer rubber core, a single-layer resin cover and one intermediate layer therebetween satisfies the following conditions: (Shore C hardness at surface of intermediate layer-encased sphere)>(Shore C hardness at ball surface), 14≤(Atti compression of core)≤38, A golf ball having a single-layer rubber core, a single-layer resin cover and one intermediate layer therebetween satisfies the following conditions: (Shore C hardness at surface of intermediate layer-encased sphere)>(Shore C hardness at ball surface), 14≤(Atti compression of core)≤38, (Atti compression of core)/(Shore C hardness at core surface−Shore C hardness at core center)≤1.1, and A golf ball having a single-layer rubber core, a single-layer resin cover and one intermediate layer therebetween satisfies the following conditions: (Shore C hardness at surface of intermediate layer-encased sphere)>(Shore C hardness at ball surface), 14≤(Atti compression of core)≤38, (Atti compression of core)/(Shore C hardness at core surface−Shore C hardness at core center)≤1.1, and 600≤(Shore C hardness at surface of intermediate layer-encased sphere)×(specific gravity of intermediate layer material)×[volume (cm3) of intermediate layer material]. A golf ball having a single-layer rubber core, a single-layer resin cover and one intermediate layer therebetween satisfies the following conditions: (Shore C hardness at surface of intermediate layer-encased sphere)>(Shore C hardness at ball surface), 14≤(Atti compression of core)≤38, (Atti compression of core)/(Shore C hardness at core surface−Shore C hardness at core center)≤1.1, and 600≤(Shore C hardness at surface of intermediate layer-encased sphere)×(specific gravity of intermediate layer material)×[volume (cm3) of intermediate layer material]. This ball has a superior distance performance on full shots with an iron and a high spin performance in the short game, imparts a very soft feel and possesses an excellent durability to cracking on repeated impact. The ball is intended to satisfy the needs of primarily skilled amateur golfers who handle iron shots skillfully.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles
• C08K 3/30 - Sulfur-, selenium-, or tellurium-containing compounds
• C08K 5/098 - Metal salts of carboxylic acids
• C08K 5/14 - Peroxides

Abstract

A foam composition that includes a polymer material such as polyurethane or polyurea and a leachable water-soluble fine powder is provided. This composition can be used in a relatively simple process to obtain a foam body (porous body) that is uniform only at the surface or uniform throughout. The foam body can be suitably used as a golf ball member in golf balls required to have good controllability on approach shots. Also provided is a method for producing a foam member, which method includes the steps of molding the foam composition to obtain a solid molded body, and then leaching out and removing the water-soluble fine powder so as to obtain a foam-molded body.

IPC Classes  ?

• C08J 9/26 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof by elimination of a solid phase from a macromolecular composition or article, e.g. leaching out
• A63B 37/00 - Solid ballsMarbles

Abstract

The invention provides a distance golf ball endowed with a good flight performance when struck with a driver or an iron by an ordinary amateur golfer, a good durability to repeated impact and a soft feel. The ball is a multi-piece solid golf ball having a core, an intermediate layer and a cover, wherein the core is formed as one or more layer of a rubber composition, the intermediate layer is formed primarily of an ionomer resin, the intermediate layer and the cover are both single layers, each containing an inorganic granular filler, and the ball satisfies the following conditions: surface hardness of ball > surface hardness of sphere consisting of core encased by intermediate layer (intermediate layer-encased sphere), Shore D hardness at surface of ball - Shore D hardness at center of core ≥ 37, specific gravity of cover > specific gravity of intermediate layer.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

envelope layer thickness (mm)×envelope layer material hardness (Shore D hardness) cover thickness (mm)×cover material hardness (Shore D hardness); and the core and ball have optimized deflections when subjected to a specific loading. This ball serves as a distance ball which enables a superior distance to be achieved on full shots with a driver and with irons.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

In a golf ball having a core of one or more layer, an intermediate layer and a cover, the cover consists of an inner cover layer and an outer cover layer, the inner cover layer and the outer cover layer being made of materials having hardnesses on the Shore D hardness scale of, respectively, from 20 to 40 and from 35 to 55, and the inner and outer cover layers having a combined thickness of from 0.6 to 1.2 mm. Also, letting (A) and (B) be the rebound resiliences (%) of, respectively, the inner cover layer material and the outer cover layer material based on JIS-K 6255, the ball satisfies the condition 0%<(A)−(B)<18%. This ball exhibits a higher spin rate on approach shots and a good feel without lowering the distance performance on shots with a driver (W #1).

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

In a golf ball having a core, a cover, at least one intermediate layer therebetween, and a coating layer on the cover, the cover is formed of a transparent or translucent resin composition and the intermediate layer is formed of a resin composition. The sphere consisting of the core encased by the intermediate layer has specific lightness and chroma values in the Lab color space. The coating layer is composed of one or more layer, at least one of which contains an effect pigment having polarizing properties. Markings are provided inside of the coating layer and have a specific L value. During use, the ball retains a visual to familiarity close to that of a white ball. Up close, it is clearly discernible from a white ball; from a distance, it appears white and is highly visible.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles
• C08K 9/02 - Ingredients treated with inorganic substances

Abstract

The present invention provides the rubber composition for a golf ball comprising (a) a base rubber, (b) a co-crosslinking agent which is an α,β-unsaturated carboxylic acid or a metal salt thereof or both, (c) a crosslinking initiator, and (d) an alcohol, wherein the amount of component (d) is from 0.1 to 10 parts by weight per 100 parts by weight of the base rubber (a) and the compounding ratio between component (b) and component (c) is set to at least 60 of E value that is represented by “E=the molar amount of component (b)/the molar amount of the active oxygen of component (c), and a golf ball using the rubber composition, in order to achieve the object that good durability of the golf ball to impact is maintained.

IPC Classes  ?

• C08L 9/00 - Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
• A63B 37/00 - Solid ballsMarbles
• C08L 81/02 - PolythioethersPolythioether-ethers
• C08K 5/101 - EstersEther-esters of monocarboxylic acids
• C08K 5/14 - Peroxides
• C08L 23/12 - Polypropene
• C08F 4/44 - MetalsMetal hydridesMetallo-organic compoundsUse thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths, or actinides

Abstract

The present invention provides a golf ball comprising a core of one or more layers and a cover of one or more layers which encases the core, wherein at least one layer of the cover is formed of the resin composition comprising (a′) a polyester resin and (b) an amine-containing polymer having a branched structure. In the golf ball of the present invention, the adhesion property between the core and each cover layer adjacent to the core can be improved and the excellent durability can be obtained.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles
• C08L 47/00 - Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bondsCompositions of derivatives of such polymers
• C08L 67/02 - Polyesters derived from dicarboxylic acids and dihydroxy compounds

Abstract

A golf club head according to the disclosure is a cavity-back iron type golf club head that includes a face portion and a back portion. The face portion includes a front face and a rear face facing away from each other, the front face being a ball-striking face. A non-metallic member is fixed to the rear face. An abutment portion including a tip portion with a curved surface is provided on the back portion. The abutment portion is passed through the back portion, and the curved surface of the tip portion contacts the non-metallic member.

IPC Classes  ?

• A63B 53/06 - Heads adjustable
• A63B 53/04 - Heads

Abstract

A golf club head according to the disclosure is a cavity-back iron type golf club head that includes a face portion, a cavity portion provided behind the face portion, and a protrusion provided on a lower part of a rear face of the face portion. The protrusion includes a first recess extending from an upper surface of the protrusion toward a sole, a second recess positioned closer to a toe than the first recess is and extending from the upper surface of the protrusion toward the sole, and a thick portion provided between the first and second recesses in a toe-heel direction. The first and second recesses each has a substantially trapezoidal shape in a cross-sectional view taken along a plane that is parallel to a front face of the face portion and passes through a deepest part of each of the first and second recesses.

IPC Classes  ?

• A63B 53/04 - Heads

Abstract

The golf club head includes a face portion, a plurality of score lines formed in the face portion and extending in a toe-heel direction, and a plurality of convex portions formed in the face portion, projecting from reference plane which includes edges of each of the plurality of score lines, and extending in the toe-heel direction. The plurality of convex portions include a first convex portion and a second convex portion formed between adjacent score lines. A projecting height of the first convex portion and/or a width in an orthogonal direction of the toe-heel direction of the first convex portion is larger than that of the second convex portion.

IPC Classes  ?

• A63B 53/04 - Heads

Abstract

The base rubber (a) is a rubber obtained by mixing together (a-1) a polybutadiene and (a-2) an unneutralized ethylene-unsaturated carboxylic acid copolymer, and subsequently neutralizing the copolymer with (a-3) a metal oxide. Component (a-2) has a specific acid content and accounts for a specific portion of the combined amount of components (a-1) and (a-2). The core surface and center have a specific JIS-C hardness difference therebetween. This ball achieves both a lower spin rate and excellent durability while maintaining a high rebound.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles
• C08K 13/02 - Organic and inorganic ingredients
• C08L 9/00 - Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
• C08K 3/22 - OxidesHydroxides of metals
• C08K 5/053 - Polyhydroxylic alcohols
• C08K 5/098 - Metal salts of carboxylic acids
• C08K 5/14 - Peroxides

Abstract

A multilayer core molding method includes: an upstream process of obtaining an intermediate molded body 33; and a downstream process of performing molding using a downstream process molding apparatus 2, and wherein the downstream process includes: an intermediate molded body arrangement step of arranging the intermediate molded body on the intermediate plate cavity surface or the first downstream process mold cavity surface; and a first vulcanization step, performed after the intermediate molded body arrangement step, of vulcanization-molding the intermediate molded body until it is substantially or completely vulcanized, in a state in which at least the first downstream process mold and the intermediate plate are closed against each other.

IPC Classes  ?

• B29C 43/18 - Compression moulding, i.e. applying external pressure to flow the moulding materialApparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
• B29C 43/20 - Making multilayered or multicoloured articles
• B29C 43/58 - Measuring, controlling or regulating
• B29C 43/36 - Moulds for making articles of definite length, i.e. discrete articles
• B29L 31/54 - Balls

Abstract

A golf ball is provided which suppresses twisting due to external forces while maintaining sufficient deflection at the time of impact, reduces the spin rate without lowering ball rebound, and is thus able to effectively increase the distance traveled by the ball, particularly on shots with a driver. In the golf ball, which includes a core and a cover, the core has a core body made of a first polybutadiene rubber and having a surface with a plurality of groves or holes thereon, which grooves or holes are filled with a second polybutadiene rubber of a differing composition from the first polybutadiene rubber. The polybutadiene rubber-filled groove portions or hole portions have a higher surface hardness than the core body.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

In a golf ball for professional golfers and skilled amateurs which has a single-layer core, a cover and at least one intermediate layer therebetween, the core is molded from a rubber composition that includes a base rubber, an unsaturated carboxylic acid and/or metal salt thereof, an organic peroxide and, in a specific weight ratio, water and sulfur, and has a hardness profile which satisfies certain specific conditions. The ball achieves an excellent distance on full shots with a driver (W #1) and a middle iron, and is designed for high controllability in the short game.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles
• C08K 13/02 - Organic and inorganic ingredients
• C08L 75/08 - Polyurethanes from polyethers
• C09D 175/06 - Polyurethanes from polyesters

Abstract

In a golf ball having a rubber core of at least one layer and a cover of at least one layer encasing the core, at least one layer of the cover is formed of a resin composition that includes (I) a polyurethane or a polyurea and (II) a (meth)acrylic block copolymer, the (meth)acrylic block copolymer serving as component (II) being included in an amount of 20 parts by weight or less per 100 parts by weight of component (I). The golf ball has an excellent controllability on approach shots and is able to maintain a good scuff resistance and moldability.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles
• C08L 75/08 - Polyurethanes from polyethers

Abstract

The core has a diameter of from 35.5 to 39.5 mm and a distinctive hardness profile that satisfies specific conditions. The ball is endowed with both an excellent flight performance and excellent durability to repeated impact.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles
• C08L 9/00 - Compositions of homopolymers or copolymers of conjugated diene hydrocarbons

Abstract

In a golf ball having a core and a cover, the cover is formed primarily of polyurethane, the ball has a diameter of at least 42.8 mm and a weight of not more than 44.9 g and, in an impact test carried out by hitting the ball with a driver at a head speed of 40 m/s, the sum t1+t2 of the time t1 required from initial contact by the driver with the ball for deformation of the ball to reach a maximum and the time t2 required from the state of maximum ball deformation for the ball and driver to separate is not more than 660 μsec. This golf ball makes it possible for golfers who have a high head speed and ordinary golfers who do not to compete without relying excessively on superiority in terms of distance.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles

Abstract

A golf ball according to the present invention includes a core, a cover located outside the core and having a plurality of dimples, and a coating layer located outside the cover and containing a delusterant, the surface of the coating layer having an average roughness Ra of at least 0.35. The surface of the golf ball has a static friction coefficient of at least 0.20. A method for producing a golf ball according to the present invention includes forming a coating layer on the surface of a cover having a plurality of dimples by using a coating material composition including a polyurethane coating material, a delusterant, and a solvent having a boiling point of at least 130° C.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

In a golf ball having a core of at least one layer and a cover of at least one layer encasing the core, at least one layer of the cover is formed of a resin composition which includes (I) a polyurethane or a polyurea, (II) a thermoplastic polyester elastomer and (III) an aromatic vinyl elastomer. The thermoplastic polyester elastomer serving as component (II) and the aromatic vinyl elastomer serving component (III) have specific respective contents and properties, including Shore D hardnesses and rebound resiliences. The golf ball has an excellent controllability on approach shots without a loss of distance on driver shots. In addition, the scuff resistance and moldability are good.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles
• C08L 53/02 - Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers of vinyl aromatic monomers and conjugated dienes
• C08L 67/00 - Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chainCompositions of derivatives of such polymers
• C08L 75/02 - Polyureas
• C08L 75/04 - Polyurethanes

Abstract

A golf ball material contains (i) fine particles that have an average particle size of less than 300 μm and are composed of a crosslinked multi-component copolymer having conjugated diene units, non-conjugated olefin units and aromatic vinyl units; and (ii) a thermoplastic resin. The conjugated diene units include butadiene units, the non-conjugated olefin units include units selected from the group consisting of ethylene, propylene and 1-butene units, the aromatic vinyl units include styrene units, and the content of the conjugated diene units in the multi-component copolymer is 5 wt % or more. This golf ball material is soft, has an excellent rebound resilience and also has a good processability.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles
• C08L 23/08 - Copolymers of ethene
• C08L 77/02 - Polyamides derived from omega-amino carboxylic acids or from lactams thereof
• B29B 7/90 - Fillers or reinforcements
• B29C 45/00 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mouldApparatus therefor
• B29C 45/16 - Making multilayered or multicoloured articles
• B29L 31/54 - Balls
• B29K 101/12 - Thermoplastic materials

Abstract

In a golf ball having a core and a cover with a plurality of dimples on the surface, the cover is formed primarily of polyurethane, the dimples have a specific volume occupancy ratio and the ball has a diameter of at least 42.8 mm. In an impact test carried out by hitting the ball with a driver at a head speed of 40 m/s, the sum t1+t2 of the time t1 required from initial contact by the driver with the ball for deformation of the ball to reach a maximum and the time t2 required from the state of maximum ball deformation for the ball and driver to separate is 660 μsec or less. This golf ball makes it possible for golfers who have a high head speed and ordinary golfers who do not to compete without relying excessively on superiority in terms of distance.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

In a golf ball having a core and a cover, the cover is formed primarily of polyurethane, the ball has a weight of 44.8 g or less and, in an impact test carried out by hitting the ball with a driver at a head speed of 40 m/s, the sum t1+t2 of the time t1 required from initial contact by the driver with the ball for deformation of the ball to reach a maximum and the time t2 required from the state of maximum ball deformation for the ball and driver to separate is 650 μsec or less. This golf ball makes it possible for golfers who have a high head speed and ordinary golfers who do not to compete without relying excessively on superiority in terms of distance.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

In a golf ball having a core and a cover, the cover is formed primarily of polyurethane, the ball has a diameter of at least 43.0 mm and, in an impact test carried out by hitting the ball with a driver at a head speed of 40 m/s, the sum t1+t2 of the time t1 required from initial contact by the driver with the ball for deformation of the ball to reach a maximum and the time t2 required from the state of maximum ball deformation for the ball and driver to separate is 650 μsec or less. This golf ball makes it possible for golfers who have a high head speed and ordinary golfers who do not to compete without relying excessively on superiority in terms of distance.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

(II) a binary copolymer of an olefin and an α,β-unsaturated carboxylic acid of 3 to 8 carbons and/or a ternary copolymer of an olefin, an α,β-unsaturated carboxylic acid of 3 to 8 carbons and an ester of the α,β-unsaturated carboxylic acid, or a metal neutralization product thereof. The conjugated diene units include butadiene units, the non-conjugated olefin units include units selected from the group consisting of ethylene, propylene and 1-butene units, and the aromatic vinyl units include styrene units. The content of the conjugated diene units in the multi-component copolymer (I) is 5 wt % or more. This golf ball material is soft and has an excellent rebound resilience. Golf balls which use this material in the cover provide golfers with a competitive edge.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles
• C08L 33/08 - Homopolymers or copolymers of acrylic acid esters
• C08L 53/02 - Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers of vinyl aromatic monomers and conjugated dienes

Abstract

This ball achieves a good distance on shots with utility and iron clubs, is receptive to spin in the short game, and has a soft feel at impact on all shots, making it useful to amateur golfers.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

In a golf ball having a core, an envelope layer, an intermediate layer and a cover, the core, the envelope layer-encased sphere obtained by encasing the core with the envelope layer, the intermediate layer-encased sphere obtained by encasing the envelope layer-encased sphere with the intermediate layer and the ball obtained by encasing the intermediate layer-encased sphere with the cover have respective deflections when compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf) which satisfy specific conditions. This ball achieves a good distance on shots with a utility club and with irons, is receptive to spin in the short game and has a soft feel at impact on all shots, making it useful to amateur golfers.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

In a golf ball having a core composed of one or more layer, the outermost layer of the core is formed of a rubber composition containing a base rubber and an α,β-unsaturated metal carboxylate, an envelope layer directly encasing the core is formed of a resin composition containing a thermoplastic resin having a structure that includes α,β-ethylenically unsaturated carboxylic acid copolymerization units which accounts for at least 50 wt % of the resin composition, and a surface of the core outermost layer and the envelope layer adjoin each other through an intervening oxazoline group-containing substance. The golf ball has improved adhesion between the rubber-based core and the cover layer that directly encases the core and is formed of an ionomer resin or other α,β-ethylenically unsaturated carboxylic acid copolymer-containing resin material.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles
• B29D 99/00 - Subject matter not provided for in other groups of this subclass
• C08F 279/02 - Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group on to polymers of conjugated dienes
• C08K 3/22 - OxidesHydroxides of metals

Abstract

An information processing apparatus that estimates a hit feeling of a golf ball, includes a characteristic amount obtainment unit configured to obtain a characteristic amount of a striking sound which an estimation target ball generates as a sound source upon the estimation target ball being struck and an estimation unit configured to estimate a hit feeling of the estimation target ball based on correlation information and the characteristic amount obtained by the characteristic amount obtainment unit. The correlation information indicates correlation, for a plurality of kinds of test balls, between a hit feeling which a testing golfer feels at the time of striking a test ball and a characteristic amount of a striking sound which the test ball generates as a sound source upon the test ball being struck.

IPC Classes  ?

• A63B 47/00 - Devices for handling or treating balls
• A63B 37/00 - Solid ballsMarbles
• G01H 17/00 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the other groups of this subclass
• H04R 1/08 - MouthpiecesAttachments therefor

Abstract

A rubber composition for a golf ball core includes (a) a conjugated diene polymer, (b) a multi-component copolymer having conjugated diene units, non-conjugated olefin units and aromatic vinyl units, and (c) an organic peroxide. The conjugated diene units include butadiene units, the non-conjugated olefin units include ethylene units, and the aromatic vinyl units include styrene units. The content of conjugated diene units with respect to the multi-component copolymer is at least 5 wt %. Golf balls having at least one core layer formed of such a rubber composition and a cover of one or more layers encasing the core exhibit improved durability to cracking on repeated impact while maintaining the basic properties required of golf balls, such as flight and spin controllability on approach shots.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles
• C08L 9/00 - Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
• C07F 17/00 - Metallocenes
• B29C 45/16 - Making multilayered or multicoloured articles
• B29L 31/54 - Balls
• B29K 9/00 - Use of rubber derived from conjugated dienes, as moulding material

Abstract

A rubber composition for a golf ball core includes (a) a conjugated diene polymer, (b) a copolymer of a conjugated diene compound and a non-conjugated olefin, and (c) an organic peroxide. Golf balls having at least one core layer formed of such a rubber composition and a cover of one or more layers encasing the core exhibit improved durability to cracking on repeated impact while maintaining the basic properties required of golf balls, such as flight and spin controllability on approach shots.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

Provided are a golf ball which has a surface that sparkles when exposed to ultraviolet rays even if a naturally derived substance is used as a fluorescent material, and it is environmentally and human friendly, and a resin composition for a cover or a topcoat therefor. A resin composition for a cover or a topcoat of a golf ball of the present invention includes: a resin for a cover or a topcoat; and a plant-derived or alga-derived extract which emits light using an absorbed light as an energy source, as a fluorescent material. In the golf ball of the present invention, the cover or the topcoat is formed by using such a resin composition.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

Provided are a golf ball and a resin composition for a cover or topcoat thereof which can suppress the yellowing of the golf ball caused by ultraviolet rays even if a naturally derived substance is used as an ultraviolet absorber, and they are environmentally and human friendly. A resin composition for a cover or topcoat of a golf ball of the present invention contains: a resin for a cover or topcoat; and a plant-derived extract which absorbs ultraviolet rays. The resin composition has a color difference ΔE of 10.0 or less in a Lab color system between before and after a color tone change test, the color tone change test being carried out by irradiating a film formed from the resin composition with a xenon lamp. In the golf ball of the present invention, the cover or the topcoat is formed by using the resin composition.

IPC Classes  ?

• A63B 37/12 - Special coverings
• A63B 37/14 - Special surfaces
• A63B 37/00 - Solid ballsMarbles
• C09D 5/32 - Radiation-absorbing paints
• C09D 7/63 - Additives non-macromolecular organic
• C09D 175/04 - Polyurethanes
• C08K 5/09 - Carboxylic acidsMetal salts thereofAnhydrides thereof
• C08K 5/13 - PhenolsPhenolates

Abstract

A golf club head having a hollow structure includes a face, a sole, and a crown. The face includes a front surface and a back surface that face away from each other. The front surface is a ball-striking surface. The sole includes an abutment structure. The abutment structure includes a metallic sole fixation member fixed to the sole, an elastic member, and a metallic pin member connected to the metallic sole fixation member through the elastic member.

IPC Classes  ?

• A63B 53/06 - Heads adjustable
• A63B 53/04 - Heads
• A63B 53/08 - Golf clubs with special arrangements for obtaining a variable impact

Abstract

A method for producing a golf ball of the present invention includes the steps of: forming a first coating film on a surface of a covering having a plurality of dimples; and forming a second coating film on a surface of the first coating film. The second coating film is formed of a second coating material composition containing a polyurethane coating material and a solvent having a boiling point of 80° C. or less. An elastic recovery rate of the second coating film is 50% or more. In the golf ball of the present invention obtained by the method, an edge ratio which is a ratio of a film thickness of the second coating film in an edge portion of the dimple to a film thickness of the second coating film in a central portion of the dimple is 50% or more.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

This ball enables mid-level and skilled amateur golfers to achieve superior distances on driver shots and on iron shots, and moreover has a soft yet good feel at impact.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

In a golf ball having a core, an envelope layer, an intermediate layer and a cover, the difference between the center hardness and the surface hardness of the core is set in a specific range, the intermediate layer is formed of a resin material that includes a high-acid ionomer, the Shore C hardness relationships among the core center and the surfaces of the envelope-encased layer and the intermediate layer-encased sphere satisfy specific conditions; and the ball has a deflection when compressed under a given load which is at least 2.7 mm. This ball achieves a good distance on shots with a driver, utility club or iron, is receptive to spin in the short game, and has a soft feel at impact on all shots, making it useful to amateur golfers.

IPC Classes  ?

• A63B 37/06 - Elastic cores
• A63B 37/00 - Solid ballsMarbles

Abstract

In a golf ball having a core of at least one layer and a cover of one or more layer encasing the core, at least one layer of the cover is formed of a resin composition that includes (I) a polyurethane or a polyurea and (II) an aromatic vinyl elastomer which together satisfy certain specific conditions. The golf ball has an excellent controllability on approach shots and is also able to maintain a good scuff resistance.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles
• C08L 9/00 - Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
• C08L 75/08 - Polyurethanes from polyethers

Goods & Services

Golf balls, initial velocity golf ball cover composition, sold as a component feature of golf balls

Goods & Services

(1) Golf balls

Abstract

In a multi-piece solid golf ball having a core, an intermediate layer encasing the core and a cover which encases the intermediate layer and has numerous dimples on an outside surface thereof, the core is formed of a rubber composition including the specific ingredient compounding ingredients, the intermediate layer is formed of a resin material, the cover is formed of a urethane resin material, the core has a diameter of at least 38.0 mm, the core has a deflection when compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf) of at least 3.9 mm, the sphere obtained by encasing the core with the intermediate layer (intermediate layer-encased sphere) has a surface hardness on the Shore D hardness scale of at least 69, the ball has a surface hardness on the Shore D hardness scale of 62 or less, and the (intermediate layer thickness)/(core diameter) value is from 0.025 to 0.043, the (cover thickness)/(core diameter) value is from 0.014 to 0.027.

IPC Classes  ?

• A63B 37/00 - Solid ballsMarbles