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Reinforced bipolar electrolytic cell frame
A ski having upper and lower skins reinforced with a network of parallel glass fibres interposed with bendable wires, perpendicular to the fibres, the spaces in which are filled with a resin foam is described. Reinforced bipolar electrolytic cell frame Pimlott, J. R. (The Dow Chemical Company, Midland, MI, USA) US Pat 4 725 347 (16 February 1988) An improvement to a bipolar filter press type electrolytic cell for electrolysis of an aqueous salt solution which is composed of a number of frames is described. Each frame has a U or channel-shaped opening which is reinforced with a thermosetting resin containing a fibrous or particulate filler in direct contact with the frame. Electromagnetic wave absorbers of silicon carbide fibers Ishikawa, T., Teranishi, H., Ichikawa, H. and Ushikoshi, K. (Nippon Carbon Company Limited, Tokyo, Japan) US Pat 4 726 980 (23 February 1988) An electromagnetic device which utilizes composite materials is described. The surface layer is made from a resin matrix containing fibres having an electrical specific resistance >104f2 cm and the wave absorbing lawyer is made from composite material containing SiC fibres having an electrical specific resistance of 10-2-10492 cm. Aramid composite well riser for deep water offshore structures Salama, M. M. and Mercier, J. A. (Conoco Incorporated, Ponca City, OK, USA) US Pat 4 728 224 (1 March 1988) In a floating tension leg platform containing a number of tensioned well risers which are connected so as to be constantly in tension between a subsea template located on the sea bottom and the floating platform, the well risers comprise longitudinally and circumferentially oriented aramid fibres embedded in a resin matrix. These composite structures have low axial stiffness permitting elongation to accommodate variations in the distance between the template and the platform without the use of a conventional riser tensioner. Multiplex spoke for wheel Imao, S., Kodama, H. and Chiba, Y. (Mitsubishi Rayon Company Limited, Tokyo, Japan) US Pat 4 729 605 (8 March 1988) A spoke for a bicycle wheel comprises a fibre-reinforced plastic rod with metal parts permanently adhesively bonded at either end. An external screw thread at one metal end allows the spoke to be threaded into the wheel rim and attached to the hub so that the spoke is not subjected to excessive shear stresses. Light metal alloy piston Maeda, Y., Tatematsu, Y., Tanaka, A. and Machida, S. (Toyota Jidosha Kabushiki, Toyota, and Aisin Seiki Kabushiki Kaisha, Kariya, Japan) US Pat 4 730 548 (15 March 1988) A n annular thermal strut within and along the outer periphery of the shoulder portion of the skirt of a light metal alloy piston for an internal combustion engine is made from a bundle of high tensile strength fibres integrally moulded within a matrix of the metal alloy forming the piston. The purpose of the
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strut is to suppress the thermal expansion of the skirt portion of the piston. Leaf-spring von Esteroff, E. and Wienand, J. (Krupp Biininghaus GmbH, Werdohl, FRG) US Pat 4 730 815 (15 March 1988) A leaf spring to be clamped along part of its length between the saddle of the vehicle axis and a clamping plate comprises an elongated spring member extending in the longitudinal direction composed of fibre-reinforced duroplastic, protected by a layer of fibrereinforced duroplastic, and covered by a layer of thermoplastic. The means of clamping the spring is described; the covering layer and part of the protective layer being removed from the spring between the connecting elements. Axle mount construction for a fiber reinforced resin leaf spring Pflederer, F. R. (A. D. Smith Corporation, Milwaukee, WI, USA) US Pat 4 732 371 (22 March 1988) A means of mounting a fibre-reinforced thermosetting resin leaf spring of uniform cross-sectional area for attachment to a vehicle frame is described. The mounting section is provided with longitudinally extending grooves and ridges for increased stiffness, the extremities of the ridges forming lands for engaging with the means of clamping the spring to the vehicle. Streamlined wheel for bicycle Monte, A. D. (Also Laboratori S.a.s. di Dr P., Sorbini & C., Milan, Italy) US Pat 4 732 428 (22 March 1988) The wheel comprises two half shells which when joined form a hollow wheel. Each half shell is made of fibre-reinforced plastic, is circular about an axis with thin cross-section, and has a rim portion. When the half shells are placed together the outer rims form a groove for receiving a tyre, the tyre forming a continuous curve with the outer convex surfaces of the wheel. Large airfoil structure and method for its manufacture Hahn, M. and Sperber, F. (MesserschmittBrlkow-Blohm GmbH, FRG) US Pat 4 732 542 (22 March 1988) A rotor blade with airfoil structure for a wind-driven power plant comprises three sections: a leading edge, a trailing edge, and a spar section in between; each being formed separately and then joined together to form the whole structure. The spar section has upper and lower laminate layers with a foam bar in between. The laminate is made from layers of fibre-reinforced material, some layers containing fibre with unidirectional orientation and others containing fibre having a thrust-transmitting orientation. Laminate layers also form the upper and lower airfoil skin segments.
MATERIALS Method for forming a rod-like molding Nakasone, T., Sibagaki, T. and Kozuka, K. (Ube-Nitto Kasei Company Limited, Tokyo, Japan) US Pat 4 720 368 (19 January 1988) A method of forming a rod-like moulding of fibre-reinforced synthetic resin is described.
The core portion of the moulding has the outer portion made from fibre bundles impregnated with unhardened thermosetting resin and is coated with a thermoplastic resin. The thermoplastic resin is hardened first to form a semi-moulding and then the thermosetting resin is hardened. Composite material with improved properties Kishida, K., Sasaki, I., Mori, H.and Ii, Y. (Mitsubishi Rayon Company Limited, Tokyo, Japan) US Pat 4 720 516 (19 January 1988) The composition of a polymer matrix, which may be reinforced by a number different materials, is described. The matrix is a polyolefin (polyethylene, polypropylene, poly(4-methylpentene-1), ethylene/vinyl acetate, ethylene/ethylacrylate, or ethylene/ propylene/diene) modified with 0.05-0.8 pph (wt) of a grafted unsaturated carboxylic acid and containing <10 wt % of a polyfunctional epoxide, amine, or isocyanate, or a mixture thereof, providing that any given polyfunctional agent is <5 wt %. The reinforcing material may he fibres of glass, carbon, graphite, aromatic polyamide, SiC, polysulphone, PEEK, alumina, potassium titanate, asbestos, boron, or metal; or may be a powdery or flaky material. Bis-maleimide resin systems and structural composites prepared therefrom Shimp, D. A. and Boyd, J. D. (BASF Corporation, Parisppanny, N J, USA) US Pat 4 721 639 (26 January 1988) A fibre reinforcement which may be of woven or unidirectional fibres of carbon/ graphite, glass, boron or aramid, impregnated with a heat-curable maleimide groupcontaining resin, containing an effective amount of catalyst, is carried on a fine denier web and backed with a strippably-adherent backing paper to form a heat-curable prepreg. Carbon film coated refractory fiber cloth Doljack, F. A., Rogers, D. Z., Rickborn, S. F. and Matlow, S. L. (Northrop Corporation, Hawthorne, CA, USA) US Pat 4 732 860 (2 February 1988) A flexible electrically-conducting cloth comprises intermingled or interwoven fibres of a refractory material encapsulated in a coating containng >70 atomic % carbon, the coating being applied in sufficient quantity to render the cloth electrically conducting with a sheet resistance between 0.1 and 1000 ohms per square. Non-asbestos friction composition capable of manufacturing in dry process Horiguchi, K. and Kiba, K. (Akebono Brake Industry Company Limited, Tokyo and Akebono Research and Development Centre Limited, Hanyu, Japan) US Pat 4 722 949 (2 February 1988) A friction composition containing 1-10 vol % aramid fibre pulp, 10-40 vol % inorganic fibres, an effective amount of a resin binder together with a friction modifier, and 1-6 vol % cork powder as a processing aid may be prepared by a dry process. Reinforced cement products with improved mechanical properties and creep resistance Goldfein, S. (8370 Greensborough Drive McLean, VA 22102, USA) US Pat 4 725 491 (16 February 1988)
COMPOSITES. MAY 1989
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strut is to suppress the thermal expansion of the skirt portion of the piston. Leaf-spring von Esteroff, E. and Wienand, J. (Krupp Biininghaus GmbH, Werdohl, FRG) US Pat 4 730 815 (15 March 1988) A leaf spring to be clamped along part of its length between the saddle of the vehicle axis and a clamping plate comprises an elongated spring member extending in the longitudinal direction composed of fibre-reinforced duroplastic, protected by a layer of fibrereinforced duroplastic, and covered by a layer of thermoplastic. The means of clamping the spring is described; the covering layer and part of the protective layer being removed from the spring between the connecting elements. Axle mount construction for a fiber reinforced resin leaf spring Pflederer, F. R. (A. D. Smith Corporation, Milwaukee, WI, USA) US Pat 4 732 371 (22 March 1988) A means of mounting a fibre-reinforced thermosetting resin leaf spring of uniform cross-sectional area for attachment to a vehicle frame is described. The mounting section is provided with longitudinally extending grooves and ridges for increased stiffness, the extremities of the ridges forming lands for engaging with the means of clamping the spring to the vehicle. Streamlined wheel for bicycle Monte, A. D. (Also Laboratori S.a.s. di Dr P., Sorbini & C., Milan, Italy) US Pat 4 732 428 (22 March 1988) The wheel comprises two half shells which when joined form a hollow wheel. Each half shell is made of fibre-reinforced plastic, is circular about an axis with thin cross-section, and has a rim portion. When the half shells are placed together the outer rims form a groove for receiving a tyre, the tyre forming a continuous curve with the outer convex surfaces of the wheel. Large airfoil structure and method for its manufacture Hahn, M. and Sperber, F. (MesserschmittBrlkow-Blohm GmbH, FRG) US Pat 4 732 542 (22 March 1988) A rotor blade with airfoil structure for a wind-driven power plant comprises three sections: a leading edge, a trailing edge, and a spar section in between; each being formed separately and then joined together to form the whole structure. The spar section has upper and lower laminate layers with a foam bar in between. The laminate is made from layers of fibre-reinforced material, some layers containing fibre with unidirectional orientation and others containing fibre having a thrust-transmitting orientation. Laminate layers also form the upper and lower airfoil skin segments.
MATERIALS Method for forming a rod-like molding Nakasone, T., Sibagaki, T. and Kozuka, K. (Ube-Nitto Kasei Company Limited, Tokyo, Japan) US Pat 4 720 368 (19 January 1988) A method of forming a rod-like moulding of fibre-reinforced synthetic resin is described.
The core portion of the moulding has the outer portion made from fibre bundles impregnated with unhardened thermosetting resin and is coated with a thermoplastic resin. The thermoplastic resin is hardened first to form a semi-moulding and then the thermosetting resin is hardened. Composite material with improved properties Kishida, K., Sasaki, I., Mori, H.and Ii, Y. (Mitsubishi Rayon Company Limited, Tokyo, Japan) US Pat 4 720 516 (19 January 1988) The composition of a polymer matrix, which may be reinforced by a number different materials, is described. The matrix is a polyolefin (polyethylene, polypropylene, poly(4-methylpentene-1), ethylene/vinyl acetate, ethylene/ethylacrylate, or ethylene/ propylene/diene) modified with 0.05-0.8 pph (wt) of a grafted unsaturated carboxylic acid and containing <10 wt % of a polyfunctional epoxide, amine, or isocyanate, or a mixture thereof, providing that any given polyfunctional agent is <5 wt %. The reinforcing material may he fibres of glass, carbon, graphite, aromatic polyamide, SiC, polysulphone, PEEK, alumina, potassium titanate, asbestos, boron, or metal; or may be a powdery or flaky material. Bis-maleimide resin systems and structural composites prepared therefrom Shimp, D. A. and Boyd, J. D. (BASF Corporation, Parisppanny, N J, USA) US Pat 4 721 639 (26 January 1988) A fibre reinforcement which may be of woven or unidirectional fibres of carbon/ graphite, glass, boron or aramid, impregnated with a heat-curable maleimide groupcontaining resin, containing an effective amount of catalyst, is carried on a fine denier web and backed with a strippably-adherent backing paper to form a heat-curable prepreg. Carbon film coated refractory fiber cloth Doljack, F. A., Rogers, D. Z., Rickborn, S. F. and Matlow, S. L. (Northrop Corporation, Hawthorne, CA, USA) US Pat 4 732 860 (2 February 1988) A flexible electrically-conducting cloth comprises intermingled or interwoven fibres of a refractory material encapsulated in a coating containng >70 atomic % carbon, the coating being applied in sufficient quantity to render the cloth electrically conducting with a sheet resistance between 0.1 and 1000 ohms per square. Non-asbestos friction composition capable of manufacturing in dry process Horiguchi, K. and Kiba, K. (Akebono Brake Industry Company Limited, Tokyo and Akebono Research and Development Centre Limited, Hanyu, Japan) US Pat 4 722 949 (2 February 1988) A friction composition containing 1-10 vol % aramid fibre pulp, 10-40 vol % inorganic fibres, an effective amount of a resin binder together with a friction modifier, and 1-6 vol % cork powder as a processing aid may be prepared by a dry process. Reinforced cement products with improved mechanical properties and creep resistance Goldfein, S. (8370 Greensborough Drive McLean, VA 22102, USA) US Pat 4 725 491 (16 February 1988)
COMPOSITES. MAY 1989