The invention relates to glass strands, particularly for producing organic and/or inorganic matrix composites, the composition of which contains the following components within the limits hereafter defined and expressed in weight percent: SiO2 50-65%, Al2O3 12-23%, CaO 1-10%, MgO 6-12%, Li2O 1-3%, preferably 1-2%, BaO + SrO 0-3%, B2O3 0-3%, TiO2 0-3%, Na2O + K2O <2%, F2 0-1%, Fe2O3 <1%. Said strands comprise a glass offering an excellent compromise between the mechanical properties thereof, represented by the specific Young’s modulus, and the fusion and fiber forming conditions thereof.
C03C 3/087 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
2.
BLOCKS FOR RECEIVING A MOLTEN MATERIAL, ESPECIALLY GLASS, AND FIBERIZING INSTALLATION PROVIDED WITH SUCH BLOCKS
Flow block (1) intended for a fiberizing installation and for receiving molten material, comprising a single cavity (10) which has a flow channel (11) bounded by a wall (11a). The inlet orifice (12) has a shape which is unsymmetrical with respect to the mid-plane (Y) of the block extending along the shortest extension and has an upstream part on the glass inflow side which is wider than its opposite downstream part with respect to the mid-plane. Furthermore, the slope of the wall (11a) on the upstream side is advantageously steeper than the slope on the downstream side. The invention also relates to the bushing block which is very squat compared to the flow block.
The invention relates to glass reinforcement yarns having a composition containing the following constituents within the predetermined following limits in weight percent: SiO2 62 - 72 % AI2O3 2 - 10 % CaO 7 - 20 % MgO 1 - 7 % Na2O + K2O + Li2O 10 - 14.5 % Li2O O - 2 % BaO + SrO + ZnO O - 4 % B2O3 O - 4 % F2 0 - 2 % As2O3 0 - 0.15 %. These yarns are made of an economical glass that provides an excellent balance between the mechanical properties comprising the tensile strength and the fibre forming conditions. The invention also relates to composites containing organic and/or inorganic material(s) and to the above glass yarns.
C03C 3/078 - Glass compositions containing silica with 40% to 90% silica by weight containing an oxide of a divalent metal, e.g. an oxide of zinc
C03C 3/087 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
Tip plate (1a) intended for a bushing delivering filaments of molten material, especially of glass, comprising a plate (10) that has an inner face (11) and an outer face (12) opposite the inner face, a multitude of orifices (2) running through the plate, characterized in that the bulk of the plate (10) is profiled and the plate includes ribs (13) that project from the inner face (11), each rib (13) having a groove (14), the opening of which is situated in the plane of the outer face (12).
The invention relates to an oiling composition in the form of a physical gel for glass yarns, that comprises in wt %: 0.1 to 5 % of at least one texturing agent selected from xanthanes, guars and succinoglycans; 2 to 8 % of at least one film-forming agent; 0.1 to 8 % of at least one compound selected from the group including plasticizing agents, surfactant agents and dispersant agents; 0.1 to 4 % of at least one coupling agent; and 0 to 6 % of at least one additive. The invention also relates to glass yarns coated with the above oiling composition, and to composite materials including an organic or inorganic material reinforced with said glass yarns.
The invention relates to a glass thread that can be obtained by a method comprising mechanically stretching yarns of molten glass flowing from openings at the base of a die and having a chemical composition substantially free from boron oxide and including the following constituents according to the following limits in weight percent: SiO2 40 to 50, Al2O3 18 to 28, CaO 4 to 15, MgO 0 to 6, Na2O 10 to 14, Na2O + K2O + Li2O 13 to 20. The invention also relates to composites including such threads.
The invention relates to a glass fibre structure coated with a resin composition for reinforcing agglomerated abrasive objects, the resin composition being characterised in that it comprises the indicated amounts of the following constituents, the amounts being expressed in weight percentage of solid materials: between 75 and 98 % of a mixture of at least one novolak having a glass transition temperature which is less than or equal to 60 % and at least one novolak having a glass transition temperature higher than 60 °C; between 0.5 and 10 % of at least one wax; and between 0 and 3.5 % of at least one plasticising agent. The invention also relates to the resin composition suitable for producing the reinforcing structure and the agglomerated abrasive objects incorporating such a structure, especially abrasive grinding wheels.
C03C 25/34 - Condensation polymers of aldehydes, e.g. with phenols, ureas, melamines, amides or amines
C08L 61/06 - Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
B24D 3/34 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special natureAbrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
8.
GLASS YARNS SUITABLE FOR REINFORCING ORGANIC AND/OR INORGANIC MATERIALS
The invention relates to reinforcing glass yarns having a composition that includes the following components within the limits defined below and expressed in percentage by weight, namely 62 - 72 % SiO2 , 4 - 11 % AI2O3 , 8 - 22 % CaO,1 - 7 % MgO, 0 - 9 % Na2O + K2O + Li2O, 0 - 4 % BaO + SrO, 0 - 4 % B2O3, 0 - 2 % F2 and 0 - 4 % other components: TiO2 + ZrO2 + Fe2O3 (total iron) + P2O5 + MnO + Cr2O3 + MoO3 + ZnO + SO3. Said yarns are made from a low-cost glass providing excellent trade-off between the mechanical properties thereof, represented by specific Young's modulus, and the fibre production conditions of same. The invention also relates to the glass composition designed for the production of said glass yarns, structures based on such yarns, particularly screens, fabrics and mats, and composites including such yarns.
C03C 3/087 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
The invention relates to a glass yarn having a chemical composition which is essentially free of boron oxide and includes the following constituents within the limits defined below and expressed in percentage by weight, namely: 55 to 65 SiO2, 9 to 16 Al2O3, 15 to 26 CaO, 1 to 5 MgO, 0.5 to 5 BaO+SrO, 0 to 2 Na2O + K2O + Li2O, 0 to 1 TiO2, 0 to 2 ZnO, and 0 to 2 ZrO2. The invention also relates to composites containing said yarns.
The invention relates to a process for producing a glass by melting glass-forming materials, called batch, comprising silica and an alkali or alkaline-earth metal sulphate, at above 1300°C, characterized in that a sulphide is added to the batch so as to reduce the height of foam on the surface of the liquid glass bath at above 1300°C. The invention reduces surface foam formation on the glass and improves the heat exchange between the overhead burners and the glass bath. The invention is particularly suitable for glass intended to be fiberized.
Process for surface functionalization of a glass reinforcement, characterized in that the said reinforcements are chemically modified by means of surface treatment by the action of a homogeneous plasma at atmospheric or sub-atmospheric pressure in a controlled, oxidizing or nitriding gas atmosphere, and in that the said surface portion is contacted with an aqueous impregnating solution of an organic or inorganic matrix, or directly with the matrix.
C03C 17/32 - Surface treatment of glass, e.g. of devitrified glass, not in the form of fibres or filaments, by coating with organic material with synthetic or natural resins
C03C 17/28 - Surface treatment of glass, e.g. of devitrified glass, not in the form of fibres or filaments, by coating with organic material
C03C 23/00 - Other surface treatment of glass not in the form of fibres or filaments
C03C 25/62 - Surface treatment of fibres or filaments made from glass, minerals or slags by application of electric or wave energySurface treatment of fibres or filaments made from glass, minerals or slags by particle radiation or ion implantation
2O; 0 to 0.4% ZnO; 0 to 1% MnO; and 0 to 0.5% F. These strands have improved properties in terms of mechanical strength, acid resistance and high-temperature resistance for a low-cost composition. The invention also relates to a process for producing the said strands and to the composition allowing them to be produced.
C03C 3/087 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
The invention relates to a method for preparing layered nanoparticles, said method comprising the following steps: a) a layered material is mixed with an expansion agent selected from the polyols, b) the expanded layered material is reacted with a grafting agent in the presence of water and an acid, said agent corresponding to general formula RaXY-4-a wherein R represents a hydrogen atom or a hydrocarbonated radical containing between 1 and 40 carbon atoms, the radicals R being identical or different, X represents a silicon, zirconium or titanium atom, Y is an alkoxy radical containing between 1 and 12 carbon atoms, or a halogen, and a is equal to 1, 2 or 3, and c) layered nanoparticles are recovered. The nanoparticles obtained are especially used for the reinforcement of polymers.
The invention relates to glass fibres coated with a sizing composition comprising (in weight %): between 25 and 90 % of at least one filming agent; between 3 and 25 % of at least one coupling agent; and between 2 and 18 % of nanoparticules. The invention also relates to a sizing composition which can coat said fibres, to the method for the production thereof, and to composites containing such fibres. The inventive glass fibres have a high resistance to ageing in a damp medium.
The invention relates to reinforcing glass fibres and structures of such glass fibres with an improved resistance to damp ageing and provided with a coating composition which is obtained from a solution and/or a suspension and/or an emulsion comprising (in weight % of solid materials) between 60 and 95 % of at least one polymer, and between 2 and 18 % of nanoparticles. The invention also relates to a coating composition for coating said fibres and fibre structures, to the method for the production thereof, and to composites incorporating the inventive fibres and fibre structures.
The invention concerns a melter (1) comprising an upper chamber (A) for receiving beads or the like, a lower chamber (B) separated from the upper chamber (A) by a porous wall (9) through which, following thermal heating, glass beads or the like are liquefied in the form of a vitrifiable material, said upper and lower chambers (A, B) configuring a melting zone (ZF). The invention is characterized in that it further comprises a refining zone (ZA) fed by at least one channel (12, 13) emerging from the melting zone (ZF).
C03B 5/033 - Melting in furnacesFurnaces so far as specially adapted for glass manufacture in electric furnaces by using resistance heaters above or in the glass bath, i.e. by indirect resistance heating
The invention concerns a winding frame (1) comprising a chassis (2), said chassis including at least one spindle (6, 7) adapted to support at least one spinning cake (13), said spindle (6, 7) being rotatable about a first axis substantially perpendicular to the diameter of the spinning cake, and at least one traversing device (8) adapted to deposit at least one yarn on the spindle (6, 7) in a first reciprocating movement (C1), the yarn being further deposited on the spindle (6, 7) by a monitoring member in a second reciprocating movement (C2). The invention is characterized in that the monitoring member comprises a device for monitoring the second reciprocating movement.
The invention relates to glass yarns and glass yarn constructions coated with an electrically conductive coating composition including (based on the solid weight) 6-50 wt %, preferably 6-45 wt %, of a film-forming agent; 5-40 wt % of at least one compound selected from plasticizers, surfactants and/or dispersants; 20-75 wt % of electrically conductive particles; 0-10 wt % of a dopant; 0-10 wt % of a thickener; and 0-15 wt % of additives. The invention further relates to the electrically conductive coating composition used to coat said yarns and yarn constructions, a method for making same, and composite materials including said yarns or yarn constructions. The invention is useful for making constructions and composite materials which can be resistively heated or used as electromagnetic armour.
patents
