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Reinforced thermoplastic article
Improvements in fibres, filaments and films consisting of carbon (Coal Industry (Patents) Limited)
creases the heat distortion temperature and tensile strength while maintaining or even increasing the arc resistance.
UKPat 1 366 131 (11 Sept 1974) Fibres prepared from an extract or solution of coal are given increased strength by stretching at least 20% at a temperature above 1 200°C in an inert atmosphere.
Process for surface treatment of graphite fibre (Lockheed Aircraft Corporation) UK Pat I 366 244 [11 Sept 1974) Fibre/epoxide resin composites with high interlaminar shear strength are made from graphite fibre which has been heated for 3 to 7.2 minutes at 482 ° to 593°C in an atmosphere containing 2 to 6% oxygen in a non-reactive carrier gas. Curing of reinforced plastics stock (Glastrusions Inc) UK Pat 1 366 385 [11 Sept 1974) Impregnated glass strands are drawn through a high-frequency heating station to initiate cure throughout the entire cross-section and then through a forming die which may also be heated. Improvements in or relating to fibrereinforced resin (Permali Limited) UK Pat 1 366 636 (11 Sept 1974) The production of laminates with the fibres predominantly in one direction is made easier by needle-punching the aligned yarns so as to draw some of the fibres out and provide sufficient interaction between them to hold the yarns together in the transverse direction. Fibre reinforced composites (Monsanto Company) UK Pat 1 367 378 [18 Sept 1974) High modulus reinforced elastomers are made using a mixture of discontinuous fibres. 10 to 90% is unregenerated cellulose, such as wood fibres, with an aspect ratio of 20 to 350 and 90 to 10% is another fibrous material with an aspect ratio of 10 to 3000. The average widths of the two types of fibre differ by at least 10 Wn or the average lengths differ by a factor of at least two. Mouldable polybutylene terephthalate compositions containing acicnlar calcium metasilicate (Celanese Corporation) UK Pftt 1 367 710 (18 Sept 1974J 2 to 7% of calcium metasilicate in-
COMPOSITES. MAY 1975
Laminates (Michael John Haynes) UK Pat 1 367 761 (25 Sept 1974) A strong, durable laminate suitable for furniture or boat building consists of a transparent polyester or epoxide resin gel coat bonded to one face of a wood veneer and a glass reinforced polyester bonded to the other face. Improvements in or relating to reinforced tubes and to a method of and apparatus for making them (BTR Industries Limited) UK Pat 1 367880 (25 Sept 1974) A plastic or elastomer containing fibrous reinforcement is extruded through two concentric annular passages. By rotating the passages in opposite directions the fibres in the material discharged from each passage are orientated helically in opposite directions relative to one another. The two extrudates are allowed to consolidate into a single tube. Reinforced thermoplastic article (PPG Industries Inc) UK Pat 1 367 960 (25 Sept 1974) The composite consists of randomly orientated long glass strands laminated with a thermoplastic resin containing short glass fibres having an average length of 1.59 to 50.8 mm (1/16 to 2 in).
US PA TENTS
Reinforced synthetic plastic pipe Sajben, O. et al. (Bayer Aktiengesellchaft) US Pat 3 813 (28 May 19 74) A fibre-reinforced synthetic plastic pipe, with at least one tubular endless knitted fibre fabric which is saturated by a duroplastic material. Rotor blade shear reinforcement Palachek, C. V. and Underhill, W. K. Jr. (Textron Inc) US Pat 3 813 186 [28 May 19 74) Stiffness and shear resistance necessary for a helicopter rotor blade is provided by a first honeycomb cellular structure and a second honeycomb cellular structure joined to the trailing edge of the first. The honeycomb sections are enclosed within the leading edge spar and a tapering chamber is formed by the upper and lower skins.
Apparatus for making composite plastics articles Valyi, E. I. US Pat 3 813 198 (28May 1974) Apparatus for making pressure moulded composite parisons and blown articles therefrom. Composite flexible armor Burgess, L. E. and Brownstein, R. G. (Gulf and Western Industrial Products Co) US Pat 3 813 281 (28 May 19 74J Layers of rigid platelets are separated by layers of compressible foam material. A high velocity projectile striking a platelet in one layer compresses and forces gas from the cells in the foam material to absorb and dissipate kinetic energy. Method of laminating plastic to metal Valyi, E. I. US Pat 3 813 315 {28 May 19 74) A method of bonding a plastics layer onto a metal surface in which the metal surface is conditioned for efficient bonding, by first forming on it a substrate by rolling the metal in constact with a polymer under sufficient pressure to reduce the thickness of the metal. The layer of plastics is bonded to the substrate which forms a link between the plastics layer and the surface of the metal. Process for making carbon-containing
glasses Forker, R. B. Jr., and Panzarino, J. N. (Coming Glass Works) US Pat 3 813
232 [28 May 19 74) A process for making carbon-containing glasses from porous high-silica glass comprising the impregnation of the porous glass with acetophenone and sulphuric acid followed by a firing treatment to decompose the acetophenone to carbon and to consolidate the glass. The process produces consolidated high-silica glass containing a continuous carbon phase which is particularly useful for its uniform electrical properties, but is also characterized by high strength and improved refractoriness. Composite structure and method of preparing the composite structure West, J. C. (The Goodyear Tire and Rubber Co) USPat 3 813 257 (28 May 19 74) A method of preparing a composite structure of a cured polyurethane adhered to a treated elastomer, which comprises the steps (a) treating the elastomer with freshly prepared chlorine
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creases the heat distortion temperature and tensile strength while maintaining or even increasing the arc resistance.
UKPat 1 366 131 (11 Sept 1974) Fibres prepared from an extract or solution of coal are given increased strength by stretching at least 20% at a temperature above 1 200°C in an inert atmosphere.
Process for surface treatment of graphite fibre (Lockheed Aircraft Corporation) UK Pat I 366 244 [11 Sept 1974) Fibre/epoxide resin composites with high interlaminar shear strength are made from graphite fibre which has been heated for 3 to 7.2 minutes at 482 ° to 593°C in an atmosphere containing 2 to 6% oxygen in a non-reactive carrier gas. Curing of reinforced plastics stock (Glastrusions Inc) UK Pat 1 366 385 [11 Sept 1974) Impregnated glass strands are drawn through a high-frequency heating station to initiate cure throughout the entire cross-section and then through a forming die which may also be heated. Improvements in or relating to fibrereinforced resin (Permali Limited) UK Pat 1 366 636 (11 Sept 1974) The production of laminates with the fibres predominantly in one direction is made easier by needle-punching the aligned yarns so as to draw some of the fibres out and provide sufficient interaction between them to hold the yarns together in the transverse direction. Fibre reinforced composites (Monsanto Company) UK Pat 1 367 378 [18 Sept 1974) High modulus reinforced elastomers are made using a mixture of discontinuous fibres. 10 to 90% is unregenerated cellulose, such as wood fibres, with an aspect ratio of 20 to 350 and 90 to 10% is another fibrous material with an aspect ratio of 10 to 3000. The average widths of the two types of fibre differ by at least 10 Wn or the average lengths differ by a factor of at least two. Mouldable polybutylene terephthalate compositions containing acicnlar calcium metasilicate (Celanese Corporation) UK Pftt 1 367 710 (18 Sept 1974J 2 to 7% of calcium metasilicate in-
COMPOSITES. MAY 1975
Laminates (Michael John Haynes) UK Pat 1 367 761 (25 Sept 1974) A strong, durable laminate suitable for furniture or boat building consists of a transparent polyester or epoxide resin gel coat bonded to one face of a wood veneer and a glass reinforced polyester bonded to the other face. Improvements in or relating to reinforced tubes and to a method of and apparatus for making them (BTR Industries Limited) UK Pat 1 367880 (25 Sept 1974) A plastic or elastomer containing fibrous reinforcement is extruded through two concentric annular passages. By rotating the passages in opposite directions the fibres in the material discharged from each passage are orientated helically in opposite directions relative to one another. The two extrudates are allowed to consolidate into a single tube. Reinforced thermoplastic article (PPG Industries Inc) UK Pat 1 367 960 (25 Sept 1974) The composite consists of randomly orientated long glass strands laminated with a thermoplastic resin containing short glass fibres having an average length of 1.59 to 50.8 mm (1/16 to 2 in).
US PA TENTS
Reinforced synthetic plastic pipe Sajben, O. et al. (Bayer Aktiengesellchaft) US Pat 3 813 (28 May 19 74) A fibre-reinforced synthetic plastic pipe, with at least one tubular endless knitted fibre fabric which is saturated by a duroplastic material. Rotor blade shear reinforcement Palachek, C. V. and Underhill, W. K. Jr. (Textron Inc) US Pat 3 813 186 [28 May 19 74) Stiffness and shear resistance necessary for a helicopter rotor blade is provided by a first honeycomb cellular structure and a second honeycomb cellular structure joined to the trailing edge of the first. The honeycomb sections are enclosed within the leading edge spar and a tapering chamber is formed by the upper and lower skins.
Apparatus for making composite plastics articles Valyi, E. I. US Pat 3 813 198 (28May 1974) Apparatus for making pressure moulded composite parisons and blown articles therefrom. Composite flexible armor Burgess, L. E. and Brownstein, R. G. (Gulf and Western Industrial Products Co) US Pat 3 813 281 (28 May 19 74J Layers of rigid platelets are separated by layers of compressible foam material. A high velocity projectile striking a platelet in one layer compresses and forces gas from the cells in the foam material to absorb and dissipate kinetic energy. Method of laminating plastic to metal Valyi, E. I. US Pat 3 813 315 {28 May 19 74) A method of bonding a plastics layer onto a metal surface in which the metal surface is conditioned for efficient bonding, by first forming on it a substrate by rolling the metal in constact with a polymer under sufficient pressure to reduce the thickness of the metal. The layer of plastics is bonded to the substrate which forms a link between the plastics layer and the surface of the metal. Process for making carbon-containing
glasses Forker, R. B. Jr., and Panzarino, J. N. (Coming Glass Works) US Pat 3 813
232 [28 May 19 74) A process for making carbon-containing glasses from porous high-silica glass comprising the impregnation of the porous glass with acetophenone and sulphuric acid followed by a firing treatment to decompose the acetophenone to carbon and to consolidate the glass. The process produces consolidated high-silica glass containing a continuous carbon phase which is particularly useful for its uniform electrical properties, but is also characterized by high strength and improved refractoriness. Composite structure and method of preparing the composite structure West, J. C. (The Goodyear Tire and Rubber Co) USPat 3 813 257 (28 May 19 74) A method of preparing a composite structure of a cured polyurethane adhered to a treated elastomer, which comprises the steps (a) treating the elastomer with freshly prepared chlorine
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