Composite components of sandwich construction (Ford Motor Company Ltd, UK) GB 2 119 311 A (16 November 1983) A prereacted polyurethane fibre-reinforced thermally foamable material is sandwiched between two sheet metal shells. During the car body paint drying process the foam expands to fill the cavity uniformly.
Producing glass fibres centrifugally using a rotating disc (Japan Inorganic Material Co Ltd) GB2 120231 A (30 November 1983) Fibres from high melting glasses can be prepared, which may be alkali resistant.
Compositions (Printsulate Ltd, UK) GB 2 117 753A (19 October 1983) PFA/cellulosic fibre (from waste paper pulp) cementious composites of light weight are described.
Silicate containing polyisocyanate expanded polymer composite (Epsilon Developments Ltd, UK) GB 2117 776A (19 October 1983) EPS beads are coated with a disisocyanate/ sodium silicate mixture and compression moulded.
(United Technologies Corp, USA) GB 2 121 400 A (21 December 1983) An array of aligned SiC fibres (eg cloth) are impregnated with molten glass flowing under pressure of a heated glass billet.
Improvements in and relating to the moulding of materials: moulded materials (Fabco Ind Ltd, New Zealand) GB 2 121 718A (4 January 1984) Fibre- (including jute and Kapok) reinforced materials are layed-up by partially curing individual laminae.
PROCESSES Manufacture of fibre reinforced articles such as aircraft propellors (United Technologies Corp, USA) GB 2 120 599 A (7 December 1983) The layers of glass fibre cloth are held together with small amounts of hot-melt adhesive, prior to resin injection (by vacuum).
Securing fibre reinforced glass to structural members (United Technologies Corp, USA) GB 2 121 136 A (14 December 1983) Moulded SiC-reinforced glass rivets and bolts are described.
Reinforced concrete (Square Grip Ltd, UK) GB 2 122 126 A (11 January 1984) A device for supporting the reinforcing bars during the casting of concrete is described.
MATERIALS Laminates containing inorganic structural materials (Scott-Bader Co Ltd, UK) GB 2 110 987 A (29 June 1983) A laminate consisting of GRC/polyester concrete/ polyester GRP, which has good weathering characteristics, is described.
Thermoplastic composite material (Mitsubishi Rayon Co Ltd, Japan)GB 2 114 982 A (1 September 1983) A carbon fibre-reinforced modifiedpolypropene is described. The polymer is first grafted with, eg maleic anhydride, to give functional groups which react with a polyfunctional modifier such as diepoxides and diisocyanates during thermoplastic processing. The material has improved impact properties partly caused by reduced crystallinity.
Polyolefin/polyester laminates (G.W. Tomkinson of UK) GB 2 116 476 A (28 September 1983) A porous web of glass or polyester fibre is fused to a polyethene surface and then impregnated with polyester resin to achieve a good bond between the polyethene and GRP.
COMPOSITES. JULY 1984
Sialon ceramic material (Kennametal Inc, USA) GB 2 118 927 A (9 November 1983) A two-phase a and fl Si-AI-O-N glass ceramic is formed from a fused mixture of alumina, aluminium nitride and silicon nitride and yttrium oxide in either a 2-stage or l-stage process. The A120 3 content controls the a phase and hardness of the material.
Producing thermoplastics material laminates, foams and articles (H R Smith (Technical Div) Ltd, UK) GB 2 119 710 A (23 November 1983) Consolidation of thermoplastic (eg PES) fibre composite is achieved by incorporating a heating element wire grid into the composite stack of fibres and polymer films. Further thermoforming can be carried out without external heating. An "in situ thermally blown lamina" can also be incorporated.
Method of producing (woven) fibre-reinforced glass matrix composite articles of complex shape (United Technologies Corp, USA) GB 2120 64 7/ 8/9 A (7 December 1983) Woven fibres (eg SiC or C) are solution impregnated with a glass powder-filled thermoplastic binder. After drying the preforms can be cut to predetermined patterns of the article, stacked into the mould and warm moulded into an intermediate article which can be sintered by hot pressing into the fimshed fibre-reinforced glass. In GB 2 120 646 A, the SiC fibre tow is impregnated continously with a glass powder slurry/binder, dried and woven into cloth which can be processed similarly. In GB 2 120 649 A glass powder and short SiC fibres can be injection moulded with and without the thermoplastic binder into a preform or directly into a complex shape. Acrylic or Carbowax binders are described.
Method of manufacturing a preform from fiber reinforced composite material (The Boeing Co, USA) GB 2 121 347 A (21 December 1983) The summary only is available. A method of manufacturing a complex preform from uncured laminae in a mould is described.
Transfer molding method of producing fibre reinforced glass matrix composite articles
Process for making a composite having high elongation and heat resistance and process for making such with the prepreg (Toho Beslon Co Ltd, Japan) GB 2 115 423 A (7 September 1983) A cured, carboxyl terminated nitrile rubber modified epoxy resin prepreg is claimed to have higher failure strain and interlaminar shear strength at 20°C and 100°C.
Glass flake reinforced reaction injection moulded polymer panels (General Motors Corp, USA) GB 2 115 739A (14 September 1983) The use of glass flakes instead of milled glass fibres improves the surface finish of RR1M panels.
Acrylonitrile fibres, a process for producing acrylonitrile fibres as well as producing preoxidized fibres, fibrous active carbon or carbon fibre therefrom (Toho BeslonCo Ltd, Japan) GB 2 116 592 A (28 September 1983) PAN fibres suitable for oxidation have an aqueous deposited coating of AI2(OH)AmB nCpClq: A, B and C could be NO~, SO 2. PO43.- Preoxidation can then be carried out at a higher temperature since the product has an inherently higher strength.
Microfilaments of inorganic material eg glass (L.B. Torobin of USA) GB 2 117 373 A (12 October 1983) Microfilaments of glass of 0.5-40/Lm diameter and up to 300 mm long are produced by coaxial blowing a film of molten glass firstly into an elongated tube, which fractures longitudinally.
Reinforcing concrete with cut wire (P.L. and TJ. Rotando of USA) GB 2 118 893A (9 November 1983) A novel process for reinforcing a pipe consists of a wire-cutting mould core which automatically ejects short fibres into the surrounding cementitous matrix. The centrifugal spinning process can be used to align the fibres circumferentially. Process for producing carbon fibres (Nippon Oil Co Ltd, Japan) GB 2 118 922 A (9 November 1983) Melt spun mesophase pitch fibres are described. The application of tension during oxidation is important.