Abstract: A base material for mounting electronic components is provided which has a low density and a coefficient of thermal expansion close to that of aluminum and can be processed with ease. The base material essentially consists of aluminum or an aluminum alloy reinforced with carbon fibers with a volume fraction ranging from 0.15 to 0.55, the carbon fibers in the base material being arranged at random on a surface for mounting an electronic component and being arranged in layer in a direction vertical to the above-described surface.

Abstract: A carbon fiber cord for rubber reinforcement comprising a carbon fiber bundle having coated thereon from 5 to 50% by weight, based on the total weight of the carbon fiber bundle thus treated, of a resin composition comprising a mixture of 100 parts by weight of a butadiene-acrylonitrile copolymer having a carboxyl group on at least both terminals of the molecule of the copolymer and from 5 to 40 parts by weight of an epoxy resin, or a reaction mixture obtained therefrom, and a curing agent for the epoxy resin, and further coated thereon from 0.5 to 5% by weight, based on the total weight of the carbon fiber bundle and the resin composition coated thereon, of a mixture of a phenolformalin-rubber latex type adhesive for rubber. The carbon fiber cord exhibits excellent adhesion to rubber and fatigue resistance.

Abstract: An epoxy resin composition having excellent adhesive and high mechanical strength is disclosed. The composition comprises:(A) a bisphenol A type epoxy resin present in an amount of at least 45 wt % of the total epoxy resin;(B) a novolak type epoxy resin present in an amount of at least 8 wt % of the total epoxy resin;(C) a glycidyl amine type epoxy resin (including the one used in (D)) present in an amount of at least 15 wt % of the total epoxy resin;(D) a reaction product of a butadiene-acrylonitrile copolymer having carboxyl groups on at least both ends of the molecule and a glycidyl amine type epoxy resin, said butadiene-acrylonitrile copolymer being present in an amount of 1.

Abstract: A rocker arm made from a carbon-fiber reinforced resin is disclosed wherein various axes are defined with particularity such as the central axis of the hole through which the rocker shaft is inserted (Z-axis), a line parallel to the edge of the valve side (Y-axis) and the line that is parallel to the cam side (Y'axis). The bisect of the angle at which the Y-axis crosses the Y'axis is the X-axis. Further, cos.sup.2 .beta. of the carbon fibers present in the Y- or Y'axis side with respect to the X-Z axis is defined in detail where .beta. is a defined angle of orientation as is cos.sup.2 .alpha. which is defined in the specification.The rocker arm is produced by filling a rocker arm mold with a carbon fiber-containing synthetic resin such that cos.sup.2 .beta. of the carbon fibers meets a defined value to such an extent that the cos.sup.2 .alpha. meets a defind value. The rocker arm is lighter and stronger than conventional rocker arms.

Abstract: A light insole, with a high modulus of elasticity, which has a shank comprising a fiber-reinforced resin sheet and which is produced by putting a shank element on an insole element and heating under pressure to mold the sheet and adhere the sheet to the insole element.

Abstract: An acrylic carbon fiber with excellent thermal oxidation resistance, which contains 50 ppm or more of a phosphorus component (as phosphorus) and/or a boron component (as boron) and which contains 100 ppm or more of a zinc component (as zinc) and/or a calcium component (as calcium), and which suffers a fiber weight reduction of about 20% or less upon standing for 3 hours in air at 500.degree. C.