Method for increasing the surface tack of prepreg materials Goodrich, Richard B. and Moulton, Richard J. (Hexcel Corporation, San Francisco, CA, USA) US Pat 4 213 930 (22 July 1980) Process for the production of fibercontaining plaster boards Saar, Alfons Knuaf, Kaiserslautern, Jorg Bold and Ochsenfurt, Siegfried Franke (Gebr. Knauf Westdeutsche Gipswerke, Iphofen, Fed Rep of Germany) US Pat 4 214 027 (22 July 1980) The process is for the production of monolithic, fibre-reinforced boards sufficiently thick to be suitable for use as a floor element, which consists of a number of layers of reinforcing fibres and calcium sulphate binder. Silicon nitride coated carbon fibres and composites Galasso, Francis S. and Veltri, Richard D. (United Technologies Corporation, Hartford, Conn, USA) US Pat 4 214 037 (22 July 1980) A non-conductive fibre which consists of a carbon fibre having a thin adherent coating of silicon nitride. The coating has a thickness of from about 0.05 to about 2 microns. Fibre-resin-carbon composites and method of fabrication Seibold, Robert W., Parechanian, Haig S., Weatherill, William T. and Lowe, Robert E. (McDonnell Douglas Corporation, Long Beach, CA, USA) US Pat 4 215 161 (29 July 1980) A process for producing a plastic composite (having improved elevated temperature strength and good heat resistance) which consists of impregnating fibrous reinforcement material with a resin; curing the resin; pyrolyzing the resulting fibre-resin composite; re-impregnating with additional resin and curing addition resin. Reinforced composite structure and method of fabrication thereof Loyd, Morris S. (Rockwell International Corporation, El Segundo, CA, USA) US Pat 4 219 980 (2 September 1980) The structure consists of a composite panel having a number of fibre composite plies adhesively bonded together; a composite web, with at least one sheet of fibre composite material; and a number of quills fixed between the web and the panel.
PROCESSES Reinforcement fibres Farfor, James D. and Gall, Huba (Rocla Concrete Pipes Ltd, Melbourne, Australia) US Pat 4 210 009 (1 July 1980) A method of forming discontinuous fibres of material for reinforcing concrete. Process for producing glass fiber-reinforced resin molded sheets Yamamoto, Osamu, Matsumoto, Yoshiki, Yamada, Hiromi, and Takehara, Keishin (Nitto Boseki Co Ltd, Fukeshima, Japan) US Pat 4 212 697 (15 July 1980) The process involves impregnating glass fibres with a resin syrup; and then hardening the resin syrup. No-bleed curing of composites HiUiard, Lonnie G. and Sibborn, Michael J. (Boeing Commercial Airplane Company, Seattle, Washington DC, USA) US Pat 4 216 047 (5 August 1980) A vacuum-bag method of making a composite structure. Surface treatment of carbon fibres Goan, John C. (Great Lakes Carbon Corporation, New York, NY, USA) US Pat 4 216 262 (5 August 1980) A method for improving the bonding characteristics of carbon fibres with a resin matrix material in which a coating of 4,4,4trichloro-1, 2-epoxy butane is applied to the fibre surface. Resinous composition for surface-treating reinforcing fibers and surface-treating process Taniguchi, Itsuki, Itoh, Ryuichi, Iwatsuki, Toshihiro and Iyo, Shigehiro Ohuchi (Toray Industries Inc, Japan) US Pat 4 219 457 (26 August 1980) A process for treating carbon fibres by applying an aqueous dispersion of an epoxy resin; a condensation product of an acid component comprising an unsaturated dibasic acid and hydroxyl component comprising an oxyalkylated bisphenol; and an oxyalkylene derivative of a phenol. High strength composite of resin, helically wound fibers and chopped fibers and method of its formation Carley, Earl P. and Ackley, Richard H. (PPG Industries Inc, Pittsburgh, PA, USA) US Pat 4 220 496 (2 September 1980) A method of forming a heat curable glass fibre-reinforced composite sheet containing continuous glass strands and chopped glass strands, suitable for moulding into a shaped part.
Size for forming glass fibres having a reduced tendency to give gumming deposits Walser, Douglas M. (PPG Industries Inc, Pittsburgh, Pennsylvania, USA) US Pat 4 221 602 (September 9th 1980) The size consists of about 50 to about 65 percent of a starch; 4 to 52 percent by weight of the salt of a polyamino functional polyamide resin; 5 to 25 percent of a wax selected from the group consisting of animal waxes, vegetable waxes, mineral waxes, and synthetic waxes; and 9 to 77 percent of a fatty triglyceride.
High strength composite of resin, helically wound fibers and swirled continuous fibers and method of its formation Carley~ Earl P. (PPG Industries Inc, Pittsburgh, PA, USA) US Pat 4 220 497 (2 September 1980) The method is similar to that described in US Patent 4 220 496.
Glass-filled polybutylene terephthalate compositions of diminished warpage Salee, Gideon (Hooker Chemicals & Plastics Corp, Niagara Falls, New York, USA) US Pat 4 221 694 (September 9th 1980)
Method intended bodies Slonina, Boucher,
of obtaining fibre substrates for the production of composite J e a n - P i e r r e , Girard, Pierre, Jacques, and Gellon, Joseph (Le
Carbone-Lorraine, Paris, France.) US Pat 4 221 622 (September 9th 1980) The method involves forming filaments or threads and a binder into a coherent flat sheet; cutting perforations in the sheet; subdividing the perforated sheet into identical smaller flat sheets; stacking the smaller flat sheets, so that the perforations in one sheet overlie the perforations in the immediately underlying sheet to provide passages through the stack; and finally, threading strands or rods of fibrous filaments or threads (which have been bound together with a binder) through the passages in the formed stacks.
PRODUCTS Composite high strength to weight structure having shell and weight controlled core Cecka, Andrew M. and Pawling, Paul G. (Fansteel Inc, N Chicago, IL, USA) US Pat 4 212 461 (15 July 1980) A tennis racket frame made with filamentwound carbon fibre-reinforced resin on a chopped-cork, low density core. Filament wound pipe coupling Bennett, Joe B. (Owens-Coming Fiberglas Corporation, Toledo, Ohio, USA) US Pat 4 213 641 (22 July 1980) The pipe coupling consists of a cylindrical hollow glass fibre-reinforced thermosetting resin body and a means for registering this body also made with reinforced resin. Method for making composite tubular elements Van Auken, Richard L. (Exxon Research & Engineering Co, Florham Park, NJ, USA) US Pat 4 214 932 (29July 1980) A method for fabricating a composite tubular shaft for transmitting forces and for sustaining axial and torque bearing forces, having a tubular metal core encased in a sheath of fibre-reinforced resin. Composite friction element Littlefield, John B. (AMSTED Industries Inc, Chicago, IL, USA) US Pat 4 219 452 (26 August 1980) A brake shoe made with a composite friction material having a matrix of a vulcanized rubber binder material and filler particles including hard mineral fillers, friction modifiers and a reinforcing fibre. Sports racket Cooper, Adrianus A.G. and Leopold, Phillip M. (Pepsico Inct Purchase, New York, USA) US Pat 4 221 382 (September 9th 1980) An improved one-component composite sports racket frame having inner and outer layers of braided tape-reinforced resin bonded to a core of fibre-reinforced resin. Method of manufacturing fiber-reinforced plastic bodies Heissler, Herbert, Wurtinger, Horst, and S c h a a b , Karl H. ( M a s c h i n e n f a h r i k , Augsburg-Nurnberg Aktiengesellschaft, Munich, Fed Rep of Germany) US Pat 4 221 623 (September 9th 1980) A method of manufacturing a fibrereinforced plastic body for use in hipreplacement prostheses.
COMPOSITES. APRIL 1982