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Carbodiimide treated carbon fibre and use thereof
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Composites 26 (1995) 525-526 © 1995 Elsevier Science Limited Printed in Great Britain. All rights reserved 0010-4361/95/$10.00
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Abstracts of Patents US patent abstracts prepared by Dr R. J. Hand, University of Sheffield, UK
COMPONENTS Long wood-typo golf club Okumoto, T. and Hayashi, T. (Yokohama Rubber Co., Ltd, Tokyo, Japan) US Pat 5 322 287 (21 June 1994) A long wood-type golf club, the head of which is primarily formed from fibre reinforced resin. Wrist pin having a ceramic composite core DeBell, G.C., Allor, R.L. and Stiles, E.D. (Ford Motor Company, Dearborn, MI, USA) US Pat 5 327 813 (12 July 1994) An engine component assembly which includes a hi-material wrist pin. The wrist pin consists of a ceramic composite core surrounded by tubular shell which acts as a compliant layer between the piston and the core. This layer resists fatigue and retains any ceramic fragments in the event of failure. Composite drill pipe Tew, C. (Brunswick Corporation, Lake Forest, IL, USA) US Pat 5 332 049 (26 July 1994) A pipe for drilling a well bore comprising a fibre reinforced synthetic tube which has a centraliser mechanism for aligning it in the bore. The centraliser mechanism consists of a build-up of non-metallic material round the periphery of the tube. This build-up is surrounded by a metal sleeve. These tubes can be formed into a drilling string by means of interchangeable fittings attached to the tubes. One of the fittings has an internal taper, whilst the other has a corresponding external taper and these fittings are attached to each other by an adhesive bond. Compression moulded composite guitar soundboard Janes, R. and Cumpiano, W.R. (11730 N. 91st PI., Scottsdale, AZ 85260 and 31 Campus Plaza Rd, Hadley, MA 01035, both of USA) US Pat 5 333 527 (2 August 1994) A guitar soundboard comprising a lay-up of graphite fibre, epoxy resin layers, wherein there are approximately three to four times as many fibres in the longitudinal direction as in the transverse direction. The layers each contain ~35 wt% resin and 65 wt% graphite. The lay-up consists of layers of woven graphite fabric interspersed with undirectional graphite tape layers. The soundboard has undulations moulded into its surface to improve sound quality. The soundboard is cured by compression moulding. Fibre reinforced thermoplastic moulding compositions Sperk, J.M., Lee, B-L., Summers, J.W. and
Faber, E.M. (deceased) (B.F. Goodrich Company, Akron, OH, USA) US Pat 5 334 647 (2 August 1994) A thermoplastic moulded article comprising a fibre reinforced two-phase matrix. The matrix consists of a polyurethane and an immiscible polymer that may be PET, PETG, polycarbonate, polyacetal or an ABS copolymer. The article has a surface region that is fibre free and rich in the polyurethane component.
MATERIALS Carbodiimide treated carbon fibre and use thereof Fukushima, T., Okada, M. and Yoshioka, K. (Yamaha Corporation, Japan) US Pat 5 318 847 (7 June 1994) A carbon fibre coated with a carbodiimide agent. The bending strength of fibres coated with dicyclohexylcarbodiimide reaches a maximum of ~600 MPa for ~2 wt% of coating. Steel cord for reinforcing rubber product Kobayashi, Y., Hinoura, K., Nagamoto, A., Shimizu, T. and Kobayashi, T. (Tokusen Kogyo Co., Ltd, Hogyo, Japan)US Pat 5 319 915 (14 June 1994) A steel cord for reinforcing rubber comprising between 3 and 27 wires twisted together at a pitch of between 5 and 20 mm. Between a quarter and two-thirds of the wires have a spiral form at a pitch between 0.1 and 0.7 of the pitch of the cord so that they contact the other wires intermittently. Compact cord having preformed outer filaments Bollen, J., Bourgoius, L. and Huysentruyt, B. (N.V. Bekaert SA, Zwevegem, Belgium) US Pat 5 321 941 (21 June 1994) A steel cord for reinforcing rubber articles comprising a core of two to four steel filaments surrounded by a layer of filaments. All the filaments are between 0.15 and 4 mm in diameter and are twisted in the same direction, generally at the same pitch. Within the cord there are gaps at least 0.03 mm wide which run most of the length of the cord. Some of the filaments in the layer are twisted such that their apparent diameter is at least 4% greater than the others. Production of cement-mortar dry mix Ellenberger, P., Schmitt, H.W., Valenti, S. and Yang, Q. (Sandoz Ltd, Basel, Switzerland) US Pat 5 322 562 (21 June 1994) A storable cement-mortar dry mix formed from cement, aggregate, a reactive resin and a releasable hardener. The reactive resin is premixed within an amorphous material and
the releasable hardener is an anhydrous reaction product of an amino group containing hardener with an organic acid or a functional derivative. Compressible fabric substrate Byers, J.L., Flint, W.T. and Kerr, R.C. (Reeves Brothers, Inc., Spartanburg, SC, USA) US Pat 5 334 418 (2 August 1994) A compressible fabric which is produced by coating one side of a fabric of warp and weft fibres, thereby impregnating the fabric, with a matrix containing many cells, and curing this matrix material. High temperature ceramic composite Smith, R.G. (Minnesota Mining and Manufacturing Company, St Paul, MN, USA) US Pat 5 334 426 (2 August 1994) A ceramic composite article which contains coated ceramic oxide fibres. The fibres are coated with a first layer of a carbonaceous material that contains boron nitride particles and with a second layer comprising silicon carbide. Stampable reinforced thermoplastic sheet and articles obtained from said sheet Cognet, G., Jacquemet, R. and Lamblin, V. (Elf Atochem SA, Puteaux, France) US Pat 5 334 427 (2 August 1994) The sheet comprises a needled glass mat surrounded by an interfacial binder which is, in turn, surrounded by a thermoplastic resin reinforced with at least two different fillers. The fillers may be lamellar, spherical or substantially spherical, and the binder is chemically compatible with the resin. Composite material with a refractory fibrous reinforcement and its production process Saugnac, F. (Societe Nationale Industrielle et Aerospatiale, Paris, France) US Pat 5 334 438 (2 August 1994) A composite comprising refractory fibres embedded in a non-metallic matrix. There is an interphase between the fibres and the matrix which is between 0.05 and 3 ~tm thick and which consists of solid solution of 1-99 at% C, 1-99 at% B and up to 98 at% N. This interphase may have a lamellar or an amorphous structure or a structure intermediate between these two. Composite comprising unsaturated polyesterflexible polymer block copolymer coated fibre structures in a polyester or vinyl ester matrix McGarry, F.J. and McBain, D.S. (GenCorp Inc., Fairlawn, OH, USA) US Pat 5 334 441 (2 August 1994) A composite material comprising a fibre structure coated with a block copolymer dispersed in a polyester or vinyl ester matrix.
COMPOSITES Volume 26 Number 7 1995
525
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Composites 26 (1995) 525-526 © 1995 Elsevier Science Limited Printed in Great Britain. All rights reserved 0010-4361/95/$10.00
N
Abstracts of Patents US patent abstracts prepared by Dr R. J. Hand, University of Sheffield, UK
COMPONENTS Long wood-typo golf club Okumoto, T. and Hayashi, T. (Yokohama Rubber Co., Ltd, Tokyo, Japan) US Pat 5 322 287 (21 June 1994) A long wood-type golf club, the head of which is primarily formed from fibre reinforced resin. Wrist pin having a ceramic composite core DeBell, G.C., Allor, R.L. and Stiles, E.D. (Ford Motor Company, Dearborn, MI, USA) US Pat 5 327 813 (12 July 1994) An engine component assembly which includes a hi-material wrist pin. The wrist pin consists of a ceramic composite core surrounded by tubular shell which acts as a compliant layer between the piston and the core. This layer resists fatigue and retains any ceramic fragments in the event of failure. Composite drill pipe Tew, C. (Brunswick Corporation, Lake Forest, IL, USA) US Pat 5 332 049 (26 July 1994) A pipe for drilling a well bore comprising a fibre reinforced synthetic tube which has a centraliser mechanism for aligning it in the bore. The centraliser mechanism consists of a build-up of non-metallic material round the periphery of the tube. This build-up is surrounded by a metal sleeve. These tubes can be formed into a drilling string by means of interchangeable fittings attached to the tubes. One of the fittings has an internal taper, whilst the other has a corresponding external taper and these fittings are attached to each other by an adhesive bond. Compression moulded composite guitar soundboard Janes, R. and Cumpiano, W.R. (11730 N. 91st PI., Scottsdale, AZ 85260 and 31 Campus Plaza Rd, Hadley, MA 01035, both of USA) US Pat 5 333 527 (2 August 1994) A guitar soundboard comprising a lay-up of graphite fibre, epoxy resin layers, wherein there are approximately three to four times as many fibres in the longitudinal direction as in the transverse direction. The layers each contain ~35 wt% resin and 65 wt% graphite. The lay-up consists of layers of woven graphite fabric interspersed with undirectional graphite tape layers. The soundboard has undulations moulded into its surface to improve sound quality. The soundboard is cured by compression moulding. Fibre reinforced thermoplastic moulding compositions Sperk, J.M., Lee, B-L., Summers, J.W. and
Faber, E.M. (deceased) (B.F. Goodrich Company, Akron, OH, USA) US Pat 5 334 647 (2 August 1994) A thermoplastic moulded article comprising a fibre reinforced two-phase matrix. The matrix consists of a polyurethane and an immiscible polymer that may be PET, PETG, polycarbonate, polyacetal or an ABS copolymer. The article has a surface region that is fibre free and rich in the polyurethane component.
MATERIALS Carbodiimide treated carbon fibre and use thereof Fukushima, T., Okada, M. and Yoshioka, K. (Yamaha Corporation, Japan) US Pat 5 318 847 (7 June 1994) A carbon fibre coated with a carbodiimide agent. The bending strength of fibres coated with dicyclohexylcarbodiimide reaches a maximum of ~600 MPa for ~2 wt% of coating. Steel cord for reinforcing rubber product Kobayashi, Y., Hinoura, K., Nagamoto, A., Shimizu, T. and Kobayashi, T. (Tokusen Kogyo Co., Ltd, Hogyo, Japan)US Pat 5 319 915 (14 June 1994) A steel cord for reinforcing rubber comprising between 3 and 27 wires twisted together at a pitch of between 5 and 20 mm. Between a quarter and two-thirds of the wires have a spiral form at a pitch between 0.1 and 0.7 of the pitch of the cord so that they contact the other wires intermittently. Compact cord having preformed outer filaments Bollen, J., Bourgoius, L. and Huysentruyt, B. (N.V. Bekaert SA, Zwevegem, Belgium) US Pat 5 321 941 (21 June 1994) A steel cord for reinforcing rubber articles comprising a core of two to four steel filaments surrounded by a layer of filaments. All the filaments are between 0.15 and 4 mm in diameter and are twisted in the same direction, generally at the same pitch. Within the cord there are gaps at least 0.03 mm wide which run most of the length of the cord. Some of the filaments in the layer are twisted such that their apparent diameter is at least 4% greater than the others. Production of cement-mortar dry mix Ellenberger, P., Schmitt, H.W., Valenti, S. and Yang, Q. (Sandoz Ltd, Basel, Switzerland) US Pat 5 322 562 (21 June 1994) A storable cement-mortar dry mix formed from cement, aggregate, a reactive resin and a releasable hardener. The reactive resin is premixed within an amorphous material and
the releasable hardener is an anhydrous reaction product of an amino group containing hardener with an organic acid or a functional derivative. Compressible fabric substrate Byers, J.L., Flint, W.T. and Kerr, R.C. (Reeves Brothers, Inc., Spartanburg, SC, USA) US Pat 5 334 418 (2 August 1994) A compressible fabric which is produced by coating one side of a fabric of warp and weft fibres, thereby impregnating the fabric, with a matrix containing many cells, and curing this matrix material. High temperature ceramic composite Smith, R.G. (Minnesota Mining and Manufacturing Company, St Paul, MN, USA) US Pat 5 334 426 (2 August 1994) A ceramic composite article which contains coated ceramic oxide fibres. The fibres are coated with a first layer of a carbonaceous material that contains boron nitride particles and with a second layer comprising silicon carbide. Stampable reinforced thermoplastic sheet and articles obtained from said sheet Cognet, G., Jacquemet, R. and Lamblin, V. (Elf Atochem SA, Puteaux, France) US Pat 5 334 427 (2 August 1994) The sheet comprises a needled glass mat surrounded by an interfacial binder which is, in turn, surrounded by a thermoplastic resin reinforced with at least two different fillers. The fillers may be lamellar, spherical or substantially spherical, and the binder is chemically compatible with the resin. Composite material with a refractory fibrous reinforcement and its production process Saugnac, F. (Societe Nationale Industrielle et Aerospatiale, Paris, France) US Pat 5 334 438 (2 August 1994) A composite comprising refractory fibres embedded in a non-metallic matrix. There is an interphase between the fibres and the matrix which is between 0.05 and 3 ~tm thick and which consists of solid solution of 1-99 at% C, 1-99 at% B and up to 98 at% N. This interphase may have a lamellar or an amorphous structure or a structure intermediate between these two. Composite comprising unsaturated polyesterflexible polymer block copolymer coated fibre structures in a polyester or vinyl ester matrix McGarry, F.J. and McBain, D.S. (GenCorp Inc., Fairlawn, OH, USA) US Pat 5 334 441 (2 August 1994) A composite material comprising a fibre structure coated with a block copolymer dispersed in a polyester or vinyl ester matrix.
COMPOSITES Volume 26 Number 7 1995
525