The present invention relates to gloves with an anti-inflammatory formulation. The gloves comprise an elastomeric film (R) and at least one layer (C1, C2) of a formulation comprising an anti-inflammatory agent wherein the anti-inflammatory agent is glycyrrhizinic acid and its salts. At least one layer of the formulation is formulated for the slow release of the anti-inflammatory agent.
The present invention discloses a polymeric/inorganic composite particle formulation, wherein the formulation includes a polymer dispersion having a concentration of between 30.00 - 67.00% by dry volume, inorganic particles having a concentration of between 15.00 - 65.00% by dry volume, a pH modifier having a concentration of between 0.30 - 3.00% by weight and a dispersing agent having a concentration of between 0.25 - 5.00% by weight as well as methods of producing rubber articles using the composite particle formulation.
The present invention relates generally to a former holder locking mechanism (100) for use in latex dipping industry Accordingly, the former holder locking mechanism (100) includes: a) a shaft (110) collaboratively in communication with holder (120); b) a cam unit (130) having an active cam (130a) and a passive cam (130b) to perform locking and unlocking operations; c) active and passive biasing elements (140, 150) collaboratively work with the active and passive cams (130a, 130b) to securely urge a former (300) into tight engagement with the cavity (121) of the holder (120); d) retaining plate (160) configured in adjacent with locking protrusion (132a) of the active cam (130a); wherein each active cam (130a) and the passive cam (130b) is provided with predefined cam pathway (131a, 131b), such that they are able to collaboratively reciprocate in accordance with the locking and unlocking positions; and wherein the active and passive biasing elements (140, 150) enable to provide sufficient opposite forces to urge the cam unit (130), such that to enable the active and passive cams (130a, 130b) to be securely travelled along their predefined cam pathway (131a, 131b) as turning motion is being applied for locking or unlocking operations.
The present invention relates generally to an improved former holder locking mechanism (100a) for use in latex dipping industry. Accordingly, the improved former holder locking mechanism (100a) includes: a) a shaft (110) collaboratively in communication with a holder (120); b) a guide means (115) that collaboratively operates with a cam unit (130) and an active and passive biasing elements (140, 150); c) retaining plate (160); wherein the guide means (115) is adapted to be collaboratively operated with the active and passive cams (130a, 130b) of the cam unit (130) and in conjunction with the active and passive biasing elements (140, 150) such that to enable a former (300) to be either securely mounted in a cavity (121) of the holder (120) in locking position or to be effortlessly removed from the cavity (121) of the holder (120) in unlocking position.
An emulsion composition includes (1) a carboxylated acrylonitrile butadiene elastomer containing an acrylonitrile residue in an amount of 23 to 30 wt % and an unsaturated carboxylic acid residue in an amount of 3 to 8 wt %, and (2) a polyacrylonitrile butadiene elastomer containing an acrylonitrile residue in an amount of 20 to 50 wt % and having a weight average molecular weight (in terms of styrene) of 7,000 to 50,000. The weight ratio of the component (1)/the component (2) is from 70/30 to 90/10.
The present invention relates to an apparatus (100) for stripping an article from a mould, stretching the article and layering said article, characterised by: a first conveyor (110) having a stripping unit (120) for stripping the article from the mould and conveying the article; a track (130) having a surface that creates friction with the article held by the stripping unit (120); a second conveyor positioned beneath the first conveyor (110) to receive the article from the stripping unit (120); a plurality of rollers associated with the second conveyor for pressing the article conveyed by the second conveyor; a movable receiver (150) coupled to the second conveyor, for collecting the article from the second conveyor, and stacking the article; wherein the movable receiver (150) is vertically transposable to stack the article. The invention also relates to a method of using said apparatus (100).
An emulsion composition including at least water and an elastomer in which structural units derived from acrylonitrile, structural units derived from an unsaturated carboxylic acid, structural units derived from butadiene, and structural units derived from a self-crosslinking compound are included in a polymer main chain thereof, and a non-sulfur-based crosslinked structure is formed, the emulsion composition wherein the crosslinked structure includes a crosslinked structure formed by the self-crosslinking compound, and a crosslinked structure formed by a crosslinking agent, and the crosslinking agent is a non-polymerizable polyfunctional organic compound.
The present invention describes an improved double former holder assembly that is used in high speed latex dipping process for the production of products such as medical gloves. The double former holder assembly (11) basically consists of a U-shaped bracket (12), which is connected to two taper-L-shaped arms(13A, 13B) having an upright plate (14) and a rectangular base plate (15). The U-shaped bracket (12) has a base (16) and two vertical ends (17) and a pivotal rod(18). Each of the rectangular base plate (15) of the two taper-L-shaped arms is used to hold at least on former holder(20). In the closed positional), the upright portion (14) of the taper-L-shaped arms(13A, 13B) and aligned back to back with each other. In the open position (22) the two L-shaped arms and the former holders can have an arcuate motion of up to 150°.
An emulsion composition comprising: (1) a carboxylated acrylonitrile butadiene elastomer including an acrylonitrile residue in the amount of 23-30 wt%, and an unsaturated carboxylic acid residue in the amount of 3-8 wt%; and (2) a polyacrylonitrile butadiene elastomer including an acrylonitrile residue in the amount of 20-50 wt%, with a (styrene-converted) weight-average molecular weight of 7,000-50,000. The weight ratio of component (1) / component (2) is 70/30 to 90/10.
(1+4) (100° C.)) of 100 to 220, and (2) a poly(acrylonitrile-butadiene) having a styrene-equivalent weight-average molecular weight of 7,000 to 500,000, wherein the weight ratio of component (1)/component (2) is from 70/30 to 90/10. Also provided is a glove which, as a result of comprising the emulsion composition, exhibits excellent chemical resistance and superior flexibility.
C08L 13/00 - Compositions contenant des caoutchoucs possédant des groupes carboxyliques
C08F 236/12 - Copolymères de composés contenant plusieurs radicaux aliphatiques non saturés et l'un au moins contenant plusieurs liaisons doubles carbone-carbone le radical ne contenant que deux doubles liaisons carbone-carbone conjuguées avec des nitriles
11.
GLOVE HAVING EXCELLENT CHEMICAL RESISTANCE, AND COMPOSITION FOR SAID GLOVE
An emulsion composition for producing a glove, which contains an elastomer (1) and a poly(acrylonitrile butadiene) (2) at a component (1)/component (2) ratio of 70/30 to 90/10 by weight, wherein the elastomer (1) is a carboxylated acrylonitrile butadiene elastomer, contains an acrylonitrile residue and an unsaturated carboxylic acid residue in amounts of 30 to 40 wt% and 3 to 8 wt%, respectively, relative to the weight of the elastomer, has such a property that the content of sulfur element capable of being detected by a neutralization titration method in a burned product of the elastomer is 1 wt% or less relative to the weight of the elastomer, and has a Mooney viscosity (ML(1+4) (100˚C)) of 100 to 220, and wherein the poly(acrylonitrile butadiene) (2) has a weight average molecular weight of 7,000 to 500,000 in terms of styrene; and a glove which comprises the emulsion composition and therefore has excellent chemical resistance and flexibility.
(1+4)(100° C.)) of the crosslinked product is 100-220, wherein thin film gloves composed of said elastomer does not contain sulfur which is a crosslinking agent and sulfur composition which is a vulcanization accelerator, thickness is 0.05-0.15 mm, gloves swelling ratio at gloves formation is 240-320, tensile stress is 22-35 MPa, elongation to break is 480-620% and tensile stress at 500% elongation is 15-35 MPa.
(1+4)(100° C.) of 100-220, that contains 25-30 weight % of acrylonitrile, 62-71 weight % of butadiene and 4-8 weight % of unsaturated carboxylic acid, and does not contain sulfur crosslinking agents or vulcanization accelerators. The unsaturated carboxylic acid comprises a first fraction of substituents and a second fraction of substituents, the first fraction of substituents forming cross-links via bonds with each other, and the second fraction of substituents forming cross-links via bonds with a bivalent metal. Glove properties include thickness 0.05-0.15 mm, swelling ratio 240-320, tensile stress 22-35 MPa, elongation to break 480-620%, and tensile stress at 500% elongation 15-35 MPa. By chlorine treatment of both inner and outer surfaces of the glove, the inner surface has decreased tackiness and the outer surface has increased smoothness. Content of metal and metallic salt impurities and an anion contained in the glove is decreased.
C08F 236/14 - Copolymères de composés contenant plusieurs radicaux aliphatiques non saturés et l'un au moins contenant plusieurs liaisons doubles carbone-carbone le radical ne contenant que deux doubles liaisons carbone-carbone conjuguées contenant des éléments autres que le carbone et l'hydrogène
09 - Appareils et instruments scientifiques et électriques
10 - Appareils et instruments médicaux
Produits et services
Protective face masks not for medical purposes; Protective face masks for laboratory use; [ Disposable latex gloves for laboratory use; ] Gloves for protection against accidents; Protective gloves for industrial use; Protective work gloves; Gloves for cleanroom use Gloves for medical use; Surgical gloves; Latex and synthetic medical gloves; Gloves used in hospitals; Dental gloves; Protective gloves for medical use; Surgical face masks; Sanitary face masks for medical purposes; Face masks for use by health care providers in the healthcare industry [ ; Sterile sheets for surgical purposes ]
15.
VULCANIZATION ACCELERATOR- AND SULFUR-FREE ELASTOMER RUBBER GLOVE FOR CLEAN ROOMS
Provided is a glove comprising 25-30 wt% acrylonitrile, 62-71 wt% butadiene, and 4-8 wt% unsaturated carboxylic acid (100 wt% in total) and formed from an elastomer cross-linked by a bond comprising at least some substituent groups containing unsaturated carboxylic acid, with the remainder of the at least some substituent groups containing unsaturated carboxylic acid cross-linked by a bivalent metal. The glove does not contain sulfur, which is a crosslinking agent, or a sulfur compound, which is a vulcanization accelerator. The Mooney viscosity (ML (1+4)(100°C)) of the elastomer cross-linked by a bond comprising at least some substituent groups containing unsaturated carboxylic acid is 100-220. The glove is characterized by: the thin-film elastomer glove not containing sulfur as a crosslinking agent or a sulfur compound as a vulcanization accelerator and having a thickness of 0.05-0.15 mm; the glove swelling ratio being 240-320 when the glove is formed; the tensile stress being 22-35 MPa; the elongation at break being 480-620%; the tensile stress at elongation of 500% being 15-35 MPa; the surface of the glove that comes in contact with a user being free of adhesiveness while the surface that comes in contact with substances during work being smooth; metal and metal salt impurities being eluted; and the amount of metal, metal salt, and anions contained therein being reduced.
The elastomer glove is a glove formed of an elastomer obtained from 25-30 weight% of acrylonitrile, 62-71 weight% of butadiene and 4-8 weight% of unsaturated carboxylic acid (100 weight% total) and cross-linked by bonds resulting from at least a portion of the substituting groups of the unsaturated carboxylic acid, with the remainder of the substituting groups of the portion of the substituting groups of the unsaturated carboxylic acid being cross-linked by divalent metals; and is characterized in not containing sulfur cross-linking agent or sulfur compound vulcanization accelerator; the Mooney viscosity (ML(1+4)(100°C)) of the elastomer cross-linked by bonds resulting from at least a portion of the substituting groups of the unsaturated carboxylic acid being 100-220; and for glove properties, the thin-walled elastomer glove not containing sulfur cross-linking agent or sulfur compound vulcanization accelerator, thickness being 0.05-0.15 mm, glove swelling rate during glove molding being 240-320%, tensile stress being 22-35 MPa, elongation at rupture being 480-620%, and tensile stress at 500% elongation being 15-35 MPa.
There is disclosed a composition for producing an elastomeric thin film comprising a carboxylated acrylonitrile polybutadiene latex which is vulcanized without the use of conventional sulphur and accelerators thereby reducing the possibility of contacting health related issues of immediate Type I hypersensitivity and delay Type IV hypersensitivity caused by the presence of natural rubber latex proteins and accelerators respectively. Also disclosed is the dipping process for making gloves by using a latex composition provided by: premixing carboxylated acrylonitrile polybutadiene latex with methacrylic acid, or alternatively using a self-crosslinked latex, adding zinc oxide, adjusted to 9 to 10 of the pH level, and diluted with water to obtain 18 % to 30 % by weight of total solid content; dipping the glove former into the composition to form a layer of thin film of the latex composition on the former; drying the thin latex film on the glove former and crosslinking the latex film on the glove former.
