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Improved method for moulding hollow workpieces
ing agent since the glass fibre surface reacts giving a good bond and 'healing' any handling damage. Fibre-reinforced cement panels and processes for their preparation (Kubota Limited, J a p a n ) B r Pat 1 548 534 (18 July 1979) The separation of a colouring layer from the main body of asbestos cement tiles during freeze/thawing is prevented by incorporating a resin at the interface. Treatment of refuse (Helvisol AG, Switzerland )Br Pat 1 548 660 (18 July 1979) A method is described which converts composted refuse into a filler suitable for incorporating into resins such as polyesters. High levels can be incorporated and the composite has, for example, good flame and water resistance. Alkali resistant glass compositions and alkali resistant glass fibres. (Kanebo Limited, Nippon Electric Glass Company Limited, Japan )Br Pat 1 548 776 (18 July 1979) A low melting zirconia glass is described.
Improvements in or relating to fibre-reinforced thermoplastic compositions (FBA Undustrial Products Limited, U K ) Br Pat 1 548 922 (18 July 1979) Optimum properties of fibrereinforced san are obtained with 20% asbestos and 20% glass fibres.
Improved method for moulding hollow workpieces (Helios-Apparatebau, K G Muller and Co, W. Germany) Br Pat 1 549 052 (25 July 1979) A wax core is filament wound and after curing, the wax is melted out.
Method of manufacturing reinforced phenol resin articles and products thus obtained. (Comptfoir des Plastiques and La Societe Chimique des Charbonnages, France )Br Pat 1 548 959 (18 July 1979)
54
The water produced during the curing of resoles is removed by reaction with plaster of Paris and boric anhydride thereby enabling a non porous glass fibre composite to be produced. A method for preparing fibres for mixing into a sprayed concrete mass and a device for performing the method (Bertil Sandell, Switzerland )Br Pat 1 549 299 (25 July 1979) A method of forming steel fibres into bundles (for mixing into concrete) which subsequently are separated and alligned, is described. Improvements in the production of carbon fibre reinforced carbon composite materials Dunlop Limited, U K ) Br Pat 1 549 687 (1 August 1979) Layers of oxidised woven pan fibres are needle punched, carbonized, and carbon vapour deposited into the instertices.
Material for making bone endoprosthesis and endoprosthesis of said material (Rizhsky Nauchnoissle Dovatelsky Institut Travmatolosii I Ortopedii and Institut Mekhaniki Polimerov Adkademii Nauk Latviiskoissr of USSR) Br Pat 1 549 328 (25 July 1979) The material consists of a metal (from twisted multiple strand Ti wire )net and a twisted polymer fibre net layed - up in various configurations and used to reinforce an epoxy resin or filled polyethylene.
fically carbon fibre epoxy/p01yethersulphone prepregs using the solution process. Process for the production of activated carbon fibres ~ o h o Beslon Company Limited, Japan ) Br Pat 1 549 759 (8 August 1979) Acrylonitrile copolymer fibres, oxidized without tension yield a readily activatable carbon fibre. The rate of adsorbtion by this material is higher than conventional activated carbons.
Improvements in or relating to lightweight aggregates (J.H. Park of South Korea )Br Pat 1 550 003 (8 August 1979) A clay paste containing 10% Portland cement is used to coat expanded polystyrene spheres, which can then be satisfactorily used as a cement aggregate.
A method of forming a building product (Redland Technology Limited, UK ) Br Pat 1 550 184 (8 August 1979) A composite based on cenosphere dispersed in fused sodium silicate.
A multi-layer structure polymer composition (Mitsubishi R a y o n C o m p a n y Limited, Japan )Br Pat 1 550294 (8 August 1979) A transparent high impact polystyrene is made by successively polymerising rubbery layers on to a polystyrene bead. The product can also be used as a blend with other thermoplastics.
An axial flow gas turbine engine compressor (Rolls-Royce Limited, UK )Br Pat 1 549 422 ( 1 August 1979) A damping material, which consists of a carbon filament and aluminium powder filled epoxy resin, is used to fill in the cavities between the rotor blades.
Process for producing prosthetic teeth and bones (Asahi Kogaku Kogyo Kabushki Kaisha, Japan )Br Pat 1 550 330 (15 August 1979) A fibre reinforced hydroxy-apatite is described.
Reinforced plastics materials (Ciba-Geigy Ag, Switzerland)Br Pat 1 549 672 (1 August 1979) A method of manufacturing fibre reinforced sheets is described: speci-
The manufacture of reinforced polyolefine compositions ~TBA Industrial Products Limited, U K ) Br Pat 1 550 358 (15 August 1979)
COMPOSITES. JANUARY 1980
Improvements in or relating to fibre-reinforced thermoplastic compositions (FBA Undustrial Products Limited, U K ) Br Pat 1 548 922 (18 July 1979) Optimum properties of fibrereinforced san are obtained with 20% asbestos and 20% glass fibres.
Improved method for moulding hollow workpieces (Helios-Apparatebau, K G Muller and Co, W. Germany) Br Pat 1 549 052 (25 July 1979) A wax core is filament wound and after curing, the wax is melted out.
Method of manufacturing reinforced phenol resin articles and products thus obtained. (Comptfoir des Plastiques and La Societe Chimique des Charbonnages, France )Br Pat 1 548 959 (18 July 1979)
54
The water produced during the curing of resoles is removed by reaction with plaster of Paris and boric anhydride thereby enabling a non porous glass fibre composite to be produced. A method for preparing fibres for mixing into a sprayed concrete mass and a device for performing the method (Bertil Sandell, Switzerland )Br Pat 1 549 299 (25 July 1979) A method of forming steel fibres into bundles (for mixing into concrete) which subsequently are separated and alligned, is described. Improvements in the production of carbon fibre reinforced carbon composite materials Dunlop Limited, U K ) Br Pat 1 549 687 (1 August 1979) Layers of oxidised woven pan fibres are needle punched, carbonized, and carbon vapour deposited into the instertices.
Material for making bone endoprosthesis and endoprosthesis of said material (Rizhsky Nauchnoissle Dovatelsky Institut Travmatolosii I Ortopedii and Institut Mekhaniki Polimerov Adkademii Nauk Latviiskoissr of USSR) Br Pat 1 549 328 (25 July 1979) The material consists of a metal (from twisted multiple strand Ti wire )net and a twisted polymer fibre net layed - up in various configurations and used to reinforce an epoxy resin or filled polyethylene.
fically carbon fibre epoxy/p01yethersulphone prepregs using the solution process. Process for the production of activated carbon fibres ~ o h o Beslon Company Limited, Japan ) Br Pat 1 549 759 (8 August 1979) Acrylonitrile copolymer fibres, oxidized without tension yield a readily activatable carbon fibre. The rate of adsorbtion by this material is higher than conventional activated carbons.
Improvements in or relating to lightweight aggregates (J.H. Park of South Korea )Br Pat 1 550 003 (8 August 1979) A clay paste containing 10% Portland cement is used to coat expanded polystyrene spheres, which can then be satisfactorily used as a cement aggregate.
A method of forming a building product (Redland Technology Limited, UK ) Br Pat 1 550 184 (8 August 1979) A composite based on cenosphere dispersed in fused sodium silicate.
A multi-layer structure polymer composition (Mitsubishi R a y o n C o m p a n y Limited, Japan )Br Pat 1 550294 (8 August 1979) A transparent high impact polystyrene is made by successively polymerising rubbery layers on to a polystyrene bead. The product can also be used as a blend with other thermoplastics.
An axial flow gas turbine engine compressor (Rolls-Royce Limited, UK )Br Pat 1 549 422 ( 1 August 1979) A damping material, which consists of a carbon filament and aluminium powder filled epoxy resin, is used to fill in the cavities between the rotor blades.
Process for producing prosthetic teeth and bones (Asahi Kogaku Kogyo Kabushki Kaisha, Japan )Br Pat 1 550 330 (15 August 1979) A fibre reinforced hydroxy-apatite is described.
Reinforced plastics materials (Ciba-Geigy Ag, Switzerland)Br Pat 1 549 672 (1 August 1979) A method of manufacturing fibre reinforced sheets is described: speci-
The manufacture of reinforced polyolefine compositions ~TBA Industrial Products Limited, U K ) Br Pat 1 550 358 (15 August 1979)
COMPOSITES. JANUARY 1980