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Method of producing glass fibre mat reinforced plastics panels without the fiber readout defect
Japan) US Pat 4 664 936 (12 May 1987) Fabric material of an aromatic polyamide fibre exposed to low temperature plasma, such that ruggedness of 0.01-0.5~tm is formed on the surface of the fibres, undergoes graft polymerization with an ethylenically unsaturated compound and is then impregnated with an organic resinous binder. Fibre reinforced materials and thermoplastic reinforcing fibres therefor
Sperling, B. P. and Pedersen, K. B. (Bent Pagh Sperling, Nivaa, Denmark) US Pat 4 665 109 (12 May 1987) A reinforcing material comprising thermoplastic fibres consisting of a surface layer of stretched thermoplastic material weld bonded below to a base layer of stretched thermoplastic material of good tensile strength and above to an outer layer of hard mineral particles. A fibre reinforced material in which thermoplastic fibres are incorporated in a hydraulic or cross linking type of matrix material is also claimed. Cementitious composite material with silicon carbide aggregate
Bright, R. P., Double, D. D. and Wise, S. (F. P. C. Research, Inc., Clinton, MD, USA) US Pat 4 666 520 (19 May 1987) The detailed composition of a cementitious composite material containing at least 35% graded silicon carbide particles is given. The composite material has a lower coefficient of thermal expansion, greater thermal conductivity and an increased abrasion resistance compared to materials with stainless steel particles as principal filler. Flame-retardant polyethylene terephthalate resin composition
Aoki, Y. (Mitsubishi Rayon Co., Ltd, Tokyo, Japan) US Pat 4 666 965 (19 May 1987) The detailed composition of a flame-retardant polyethylene terephthalate resin is given. Interstitially protected oxidation resistant carbon-carbon composite
Strangman, T. E. and Keiser, R. J. (Secretary of the Air Force, Washington, DC, USA) US Pat 4 668 579 (26 May 1987) From one to ten layers of a protective coat consisting of an underlay portion of boron carbide and an overlay portion of silicon carbide (each portion 0.5-5gm thick) are deposited on the carbon fibre bundles of a multidirectional carbon-carbon composite. High-strength carbonaceous fiber
Ogawa, H., Shigei, T., Sugeno, H. and Ichimaru, K. (Toho Beslon Co., Ltd., Tokyo, Japan) US Pat 4 671 950 (9 June 1987) A method of producing a carbonaceous fibre with a carbon content of 70-90 weight % is described. Self-extinguishing thermoplastic molding materials
polyester
Seller, E., Hambrecht, ~. and Heinz, G. (BASF Aktiengesellschaft, Ludwigshafen, FRG) US Pat 4 672 086 (9 June 1987) The detailed composition of a selfextinguishing thermoplastic moulding material, the main components being polyethylene/polybutylene terephthalate and polyphenylene ether polymers, is given.
256
Cordierite ceramics containing silicon carbide whisker reinforcement
Gadkaree, K. P., Montierth, M. R. and Taylor, M. P. (Coming Glass Works, Corning, NY, USA) US Pat 4 673 658 (16 June 1987) The product described consists of a 60-95 weight % oxide crystal phase (mostly corderire, 5-40 weight % silicon carbide whiskers of diameter 3 [xm, length 30 Ixm phase, and a composition of 5-40 weight % SiC, 25-54 weight % SiO2 18-48 weight % AI20 3 and 5-19 weight % RO, where RO is mainly MgO with optional defined proportions of one or more of MnO, NiO, CoO and FeO in partial substitution. A modulus rupture strength >5000 psi is also claimed. Piezoelectric composite material
Tsunooka, T., Saito, S. and Yamamoto, H. I. T. (NGK Spark Plug Co., Ltd, Nagoya, Japan) US Pat 4 675 123 (23 June 1987) The material described comprises a mixture of one or more polymers, in a ratio 1:9 to 9:1 by volume, and a ferroelectric ceramic powder containing >90% grains of a particle size l lxm-3mm comprising microcrystals with single domains. The method of preparation for these crystals is described.
PROCESSES Continuous process for preparing reinforced resin laminates
Gotou, M., Isshiki, M., Uozumi, S., Ohizumi, M. and Fushiki, Y. (Kanegufuchi Kagaku Kogyo Kabushiki Kaisha, Osaka, Japan) US Pat 4 662 973 (5 May 1987) Fibrous substrate sheets, impregnated with a liquid thermosetting resin, are combined into a multiple ply uncured laminate sheet sandwiched between covering sheets, of which one, a cladding metal foil, adheres to the uncured laminate. The sheets are cured in a continuous process for the preparation of flat, rigid, reinforced resin laminate printed circuit board stock. Pultrusion of glass and glass-ceramic matrix composites
Layden, G. K. and Prewo, K. M. (Secretary of the Navy, Washington, DC, USA) US Pat 4 664 731 (12 May 1987) A method for making fibre reinforced glass composite articles whereby glass impregnated fibre preforms containing a temporary thermoplastic resin binder are passed through a bakeout gradient oven for burnout of the binder and the preform is then passed through a pultrusion die assembly for consolidation by matrix flow and diffusion to give formed structures. Process for laminating film to woven fabric
Tadros, S. E. (E. I. Du Pont de Nemours and Company, Wilmington, DE, USA) US Pat 4 664 738 (12 May 1987) A process for laminating a thermoplastic film to woven fabric in which the fabric fibres arc infrared wave-length absorbing or are covered with infrared wave-length absorbing material, providing a flat covering over the fabric. Method of producing glass fibre mat reinforced plastics panels without the fiber readout defect
Ghavamikia, H. (General Motors Corporation, Detroit, MI, USA) US Pat 4 664 862 (12 May 1987) A method of moulding glass fibre mat reinforced plastic panels in which the textured surface of the panels is substantially free of any glass fibres, is described. Process for the preparation of prepregs, and the reinforced composite materials which can be obtained therewith
Forgo, I., Manso, E., Gruber, U. and Huwyler, R. (Ciba-Geigy Corporation, Ardsley, NY, USA) US Pat 4 666 954 (19 May 1987) A process for the preparation of prepregs by impregnating a reinforcing material with a liquid, solvent free composition comprising an epoxide resin and a heat activable curing agent, a non-epoxide containing a photopolymerizable acrylic ester and a photopolymerization catalyst, exposing the material to actinic radiation until solidification, and heating to cure the epoxide resin. Process for providing a synthetic resin coating on a concrete structure
Hillemeier, B. and Wichern, R. (Hochtief Aktiengesellschaft vorm, Gebr. Helfmann, Essen, FRG) US Pat 4 670 315 (2 June 1987) In this process, an intermediate layer of fibre-containing concrete is sprayed onto the interior of the concrete structure and the corrosion-resistant synthetic resin layer anchors onto the fibre components projecting from the intermediate layer. Method for manufacturing a fiber reinforcement body for a metal matrix composite
Anahara, M., Mizuno, Y., Hirano, M., Gomi, F. (Kabushiki Kaisha Toyoda, Jedoshokki Seisakusho Kariya, Japan) US Pat 4 671 336 (9 June 1987) A method for preparing a fibre reinforcement body with two chill members and a yarn of fibres made of reinforcing material, and placing it in an injection mould for use in a molten metal infiltration casting process for reinforcing metal matrix composite articles. Apparatus for electrostatically orienting reinforcing particles in a layer of reinforced polymeric material
Tassone, J. V. and Candor, J. T. (Dayco Products, Inc., Dayton, OH, USA) US Pat 4 67l 758 (9 June 1987) In the apparatus described, a fabric sheet is moved between electrodes which results in orienting reinforcing particles in a liquid polymeric material which is coated onto the sheet, heated and then dried. Method of manufacture of large high pressure composite bottles
Mohan, R. M. (Edo Corporation Fiber Science Division, Utah, USA) US Pat 4 671 831 (9 June 1987) A resin-impregnated, thin-shelled composite structure is wound onto a winding mandrel using high strength filament, the resin cured, the structure cut from the mandrel, rejoined, the remainder of the pressure vessel wound on the resin-impregnated structure using high strength filament and the resin cured. Process for forming composite molds to be used in the manufacture of composite parts
Stewart, R. B. (Boise, ID, USA) US Pat 4 671 837 (9 June 1987)
COMPOSITES. MAY 1988
Sperling, B. P. and Pedersen, K. B. (Bent Pagh Sperling, Nivaa, Denmark) US Pat 4 665 109 (12 May 1987) A reinforcing material comprising thermoplastic fibres consisting of a surface layer of stretched thermoplastic material weld bonded below to a base layer of stretched thermoplastic material of good tensile strength and above to an outer layer of hard mineral particles. A fibre reinforced material in which thermoplastic fibres are incorporated in a hydraulic or cross linking type of matrix material is also claimed. Cementitious composite material with silicon carbide aggregate
Bright, R. P., Double, D. D. and Wise, S. (F. P. C. Research, Inc., Clinton, MD, USA) US Pat 4 666 520 (19 May 1987) The detailed composition of a cementitious composite material containing at least 35% graded silicon carbide particles is given. The composite material has a lower coefficient of thermal expansion, greater thermal conductivity and an increased abrasion resistance compared to materials with stainless steel particles as principal filler. Flame-retardant polyethylene terephthalate resin composition
Aoki, Y. (Mitsubishi Rayon Co., Ltd, Tokyo, Japan) US Pat 4 666 965 (19 May 1987) The detailed composition of a flame-retardant polyethylene terephthalate resin is given. Interstitially protected oxidation resistant carbon-carbon composite
Strangman, T. E. and Keiser, R. J. (Secretary of the Air Force, Washington, DC, USA) US Pat 4 668 579 (26 May 1987) From one to ten layers of a protective coat consisting of an underlay portion of boron carbide and an overlay portion of silicon carbide (each portion 0.5-5gm thick) are deposited on the carbon fibre bundles of a multidirectional carbon-carbon composite. High-strength carbonaceous fiber
Ogawa, H., Shigei, T., Sugeno, H. and Ichimaru, K. (Toho Beslon Co., Ltd., Tokyo, Japan) US Pat 4 671 950 (9 June 1987) A method of producing a carbonaceous fibre with a carbon content of 70-90 weight % is described. Self-extinguishing thermoplastic molding materials
polyester
Seller, E., Hambrecht, ~. and Heinz, G. (BASF Aktiengesellschaft, Ludwigshafen, FRG) US Pat 4 672 086 (9 June 1987) The detailed composition of a selfextinguishing thermoplastic moulding material, the main components being polyethylene/polybutylene terephthalate and polyphenylene ether polymers, is given.
256
Cordierite ceramics containing silicon carbide whisker reinforcement
Gadkaree, K. P., Montierth, M. R. and Taylor, M. P. (Coming Glass Works, Corning, NY, USA) US Pat 4 673 658 (16 June 1987) The product described consists of a 60-95 weight % oxide crystal phase (mostly corderire, 5-40 weight % silicon carbide whiskers of diameter 3 [xm, length 30 Ixm phase, and a composition of 5-40 weight % SiC, 25-54 weight % SiO2 18-48 weight % AI20 3 and 5-19 weight % RO, where RO is mainly MgO with optional defined proportions of one or more of MnO, NiO, CoO and FeO in partial substitution. A modulus rupture strength >5000 psi is also claimed. Piezoelectric composite material
Tsunooka, T., Saito, S. and Yamamoto, H. I. T. (NGK Spark Plug Co., Ltd, Nagoya, Japan) US Pat 4 675 123 (23 June 1987) The material described comprises a mixture of one or more polymers, in a ratio 1:9 to 9:1 by volume, and a ferroelectric ceramic powder containing >90% grains of a particle size l lxm-3mm comprising microcrystals with single domains. The method of preparation for these crystals is described.
PROCESSES Continuous process for preparing reinforced resin laminates
Gotou, M., Isshiki, M., Uozumi, S., Ohizumi, M. and Fushiki, Y. (Kanegufuchi Kagaku Kogyo Kabushiki Kaisha, Osaka, Japan) US Pat 4 662 973 (5 May 1987) Fibrous substrate sheets, impregnated with a liquid thermosetting resin, are combined into a multiple ply uncured laminate sheet sandwiched between covering sheets, of which one, a cladding metal foil, adheres to the uncured laminate. The sheets are cured in a continuous process for the preparation of flat, rigid, reinforced resin laminate printed circuit board stock. Pultrusion of glass and glass-ceramic matrix composites
Layden, G. K. and Prewo, K. M. (Secretary of the Navy, Washington, DC, USA) US Pat 4 664 731 (12 May 1987) A method for making fibre reinforced glass composite articles whereby glass impregnated fibre preforms containing a temporary thermoplastic resin binder are passed through a bakeout gradient oven for burnout of the binder and the preform is then passed through a pultrusion die assembly for consolidation by matrix flow and diffusion to give formed structures. Process for laminating film to woven fabric
Tadros, S. E. (E. I. Du Pont de Nemours and Company, Wilmington, DE, USA) US Pat 4 664 738 (12 May 1987) A process for laminating a thermoplastic film to woven fabric in which the fabric fibres arc infrared wave-length absorbing or are covered with infrared wave-length absorbing material, providing a flat covering over the fabric. Method of producing glass fibre mat reinforced plastics panels without the fiber readout defect
Ghavamikia, H. (General Motors Corporation, Detroit, MI, USA) US Pat 4 664 862 (12 May 1987) A method of moulding glass fibre mat reinforced plastic panels in which the textured surface of the panels is substantially free of any glass fibres, is described. Process for the preparation of prepregs, and the reinforced composite materials which can be obtained therewith
Forgo, I., Manso, E., Gruber, U. and Huwyler, R. (Ciba-Geigy Corporation, Ardsley, NY, USA) US Pat 4 666 954 (19 May 1987) A process for the preparation of prepregs by impregnating a reinforcing material with a liquid, solvent free composition comprising an epoxide resin and a heat activable curing agent, a non-epoxide containing a photopolymerizable acrylic ester and a photopolymerization catalyst, exposing the material to actinic radiation until solidification, and heating to cure the epoxide resin. Process for providing a synthetic resin coating on a concrete structure
Hillemeier, B. and Wichern, R. (Hochtief Aktiengesellschaft vorm, Gebr. Helfmann, Essen, FRG) US Pat 4 670 315 (2 June 1987) In this process, an intermediate layer of fibre-containing concrete is sprayed onto the interior of the concrete structure and the corrosion-resistant synthetic resin layer anchors onto the fibre components projecting from the intermediate layer. Method for manufacturing a fiber reinforcement body for a metal matrix composite
Anahara, M., Mizuno, Y., Hirano, M., Gomi, F. (Kabushiki Kaisha Toyoda, Jedoshokki Seisakusho Kariya, Japan) US Pat 4 671 336 (9 June 1987) A method for preparing a fibre reinforcement body with two chill members and a yarn of fibres made of reinforcing material, and placing it in an injection mould for use in a molten metal infiltration casting process for reinforcing metal matrix composite articles. Apparatus for electrostatically orienting reinforcing particles in a layer of reinforced polymeric material
Tassone, J. V. and Candor, J. T. (Dayco Products, Inc., Dayton, OH, USA) US Pat 4 67l 758 (9 June 1987) In the apparatus described, a fabric sheet is moved between electrodes which results in orienting reinforcing particles in a liquid polymeric material which is coated onto the sheet, heated and then dried. Method of manufacture of large high pressure composite bottles
Mohan, R. M. (Edo Corporation Fiber Science Division, Utah, USA) US Pat 4 671 831 (9 June 1987) A resin-impregnated, thin-shelled composite structure is wound onto a winding mandrel using high strength filament, the resin cured, the structure cut from the mandrel, rejoined, the remainder of the pressure vessel wound on the resin-impregnated structure using high strength filament and the resin cured. Process for forming composite molds to be used in the manufacture of composite parts
Stewart, R. B. (Boise, ID, USA) US Pat 4 671 837 (9 June 1987)
COMPOSITES. MAY 1988