Abstract: A shaped article having a thermal recovery property comprising a urethane resin composition, wherein said urethane resin composition comprises 100 parts by weight of a thermoplastic urethane resin and from 0.1 to 50 parts by weight of at least one polyfunctional monomer selected from the group consisting of trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, and triacrylformal, said composition is irradiated with electron beams or gamma-rays for a total dose of from 3 to 50 Mrad, subsequently deformed at a temperature not lower than the softening point of said composition, and then cooled to a temperature lower than said softening point while maintaining the deformed shape of said resin composition.

Abstract: A process for producing an optical fiber is disclosed. The process comprises forming a primary coating layer on a glass fiber, forming a secondary coating layer comprising a polyamide resin or polyester elastomer composition containing a polyfunctional monomer as a crosslinking agent, and crosslinking the secondary coating layer by irradiation with electron rays having a maximum transmittance thickness smaller than the total thickness of the primary and secondary coating layers. The resulting optical fiber has excellent heat resistance without causing optical transmission loss.

Abstract: A fluororubber-based composition comprising a mixture of 100 parts by weight of fluororubber and 10 to 100 parts by weight of an ethylene-vinyl acetate copolymer having a vinyl acetate content of 10 to 30% by weight or an ethylene-ethyl acrylate copolymer having an ethyl acrylate content of 8 to 20% by weight. The product obtained from the composition has high heat resistance and oil resistance and is useful for production of heat-shrinkable products having excellent heat setting properties.

Abstract: An optical composite cable having an outer sheath comprising a radiation cured copolymer of ethylene and vinyl acetate containing 50-85% by weight of vinyl acetate having intimately admixed therewith a flame retarding and smoke suppressing amount of a finely divided filler mixture consisting essentially of a first filler selected from hydroxides and carbonates of di- and tri-valent metals and a second filler which is zinc borate.

Abstract: A process for producing an optical fiber comprising forming a primary coating layer on a glass fiber, forming a secondary coating layer comprising a polyamide resin or polyester elastomer composition containing a polyfunctional monomer as a crosslinking agent and a lead compound as a radiation-shielding material on the primary coating layer, and crosslinking the secondary coating layer by irradiation with electron rays having a maximum transmittance thickness smaller than the total thickness of the primary and secondary coating layers is disclosed. The resulting optical fiber has excellent heat resistant without causing optical transmission loss.

Abstract: A heat shrinkable tube comprising a mixture of 100 parts by weight of fluororubber and 10 to 100 parts by weight of a crystalline polymer, said mixture being expanded into a tubular form after cross-linking. The tube has high heat resistance and oil resistance and is useful for reconnection of connectors of communication cables and electric cables a for the prevention of corrosion of steel which can be used at high temperatures.

Abstract: A heat-shrinkable tube is described. The tube is characterized by a resin composition which contains from 5 to 80% by weight of a graft copolymer, and chlorinated polyethylene having a crystal proportion of from 1 to 25%. The graft copolymer is prepared by graft-copolymerizing polyvinyl chloride to an ethylene-vinyl acetate copolymer having a vinyl acetate content of at least 50% by weight.

Abstract: A heat-shrinkable tube is described, which is provided with a compound layer on the inner surface. The compound layer contains a polymerous compound containing an unsaturated bond, and a peroxide. This heat-shrinkable tube is suitable particularly for insulative covering of electronic parts or areas where they are fitted in electronic devices.