Manufacture of cement-resin composite articles

in a bushing, gathering the fibres into strands and then applying attenuation forces to the fibres. Organic reinforcement fillers for rubber Schwab, F.C. and Murray, J.G. (Mobil Oil Corporation) US Pat 3 972 963 [3 August 1976) A process for producing an organic reinforcing filler for rubber that consists of slurry polymerizing a reaction mixture of styrene, divinylbenzene, and an anionic polymerization initiator. Use of hot buoyant liquid to convert pitch to continuous carbon filament Kohn, E.M. (Sun Oil Company) US Pat 3 972 968 (3 August 1976) A process of producing continuous carbon filaments by means of passing a stream of molten carbon forming pitch upwards through two layers of a liquid blend of molten inorganic salts and oxide: this substantially reduces the pitch's hydrogen content. The pitch finally enters an inert atmosphere at a temperature of about 1000°C thus forming it into carbon filament. Manufacture of cement-resin composite articles Rio, A., Cerrone, M. and Saini, A. US Pat 3 972 969 (3August 1976) A process for manufacturing cement articles with very high mechanical strength by forming articles of a desired shape from a mixture of mortar and concrete prepared from water, Portland cement having a high siticic modulus, pozzolana cement and a mixture consisting of 50 to 90% Portland cement and 50 to 10% of reactive siliceous material. The articles are pre-aged at room temperature and then steam-cured in an autoclave. The steam-cured articles are maintained in an anhydrous environment at an elevated temperature thereby producing porous articles; these are impregnated with a liquid monomeric polymerizable substance in an amount of the order of 10-15% which is polymerized in situ. Process for producing a board of cement-like material reinforced by fibrous material and apparatus for the process Yano, T. et al. (Onoda Cement Company) US Pat 3 9 72 9 72 (3 August 19 76) A process for continuously producing a dense board in which granules of cement-like material are prepared by adding water to a powdery cement-like

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material, and then mixing this with the fibrous material by means of a panshaped pelletizer or a drum-type rotary system mixer; this mixture is formed into a board under compression with the addition of water such that the total amount of water is the minimum amount theoretically required for hydration. Moulding process for unsaturated polyester resins containing filler material Fry, D.P. (BP Chemicals International Limited) US Pat 3 972 977(3August 1976) Process for the preparation of carbon fibre Iizuka, M., Sugiyama, N. and Hisatomi, Y. (Nippon Carbon Co Ltd) US Pat 3 9 72 984 (3 August, 1976) A process for the preparation of carbon fibres having improved strength and surface activity, in which polyacrylonitrile fibres are heated under tension in an oxidizing atmosphere and then further heated in an atmosphere containing 0.2 to 10% of gaseous hydrogen chloride, 0.5 to 6% of moisture and the remainder an inert gas, to carbonize the oxidized fibres thereby producing carbon fibres.

material, consisting of a bundle of sized glass fibres coated in a phenolic resin and elastomer composition. Reinforced sealed joint for membrane segments Seaman, N.R. (Seaman Corporation) US Pat 3 9 73 364 (10 August 19 76J Tyre reinforcement Marzocchi, A., Leary, D.E. (OwensComing Fiberglas Corporation) US Pat 3 9 73 613 [10 August 19 76J In a pneumatic tyre construction an improvement consisting of at least one folded reinforcing belt within the crown peripherally circling the carcass of the tyre beneath the tread; the belt contains mutually parallel cords. Alkali resistant glass compositions and alkali resistant glass fibres prepared therefrom Ohtomo, K. and Yoshimura, T. (Kanebo Ltd) US Pat 3 9 73 9 74 (10 August 19 76) A method and composition for producing 5-50/zm diameter alkali resistant glass fibres based on SiO2, ZrO2 and an alkali earth metal oxide.

Process for producing board of cement-like material reinforced by glass fiber Yano, T., Ichikawa, K., Take, T. and Method for the preparation of porous Sasano, T. (Onodo Cement Co Ltd) ferrous metal impregnated with US Pat 3 974 024 (10 August 1976) magnesium metal A process for continuously producing Easwaran, J. and Foerster, G.S. (NL a dense board of cement-like Industries, Inc) US Pat 3 973 061 material reinforced by glass fibres. A (3 August 1976) process for continuously producing a A process for producing a porous ferrous light board of air-dispersed cement-like metal network impregnated with material reinforced by glass fibres. magnesium from scrap ferrous metal. The scrap is compacted under pressure to form a porous network which is then Process for producing carbon fibers from mesophase pitch immersed into a molten bath of magnesium to impregnate it with magnesium. McHenry, E.R. (Union Carbide Corp) US Pat 3 264 (10 August 1976) A process for producing a highSpot blocked thermoplastic film modulus, high-strength carbon fibre laminate by spinning fibre from a nonthixoClayton, W.J. (Mobil Oil Corporation) tropic carbonaceous mesophase pitch, US Pat 3 973 063 (3 August 1976) thermosetting the fibre and then A laminate of at least two thermocarbonizing the thermoset fibre. plastic films having parallel embossed ribs running in at least one direction: Artificial tennis-playing court and the films are blocked together at spots process along each rib, whereby the films are Stevens, J. and Slosberg, D.K. joined discontinuously. (Pandel-Bradford Inc) US Pat 3 974 312 (10 August 1976} An artificial surface material having a Glass fibre material having strength flat, woven,fibre-glass base sheet, from retention in a moist environment one side of which protrude fine upright Fahey, D.M. (PPG Industries Inc) US Pat 3 973 071 (3 August 1976) glass fibres which are coated with a A glass fibre bundle, suitable for resin. A backing sheet is secured to reinforcing a host elastomeric the other side of the base sheet.

COMPOSITES. OCTOBER 1977