Patent ID: 7579057

Claim:
An irradiated resin molded article for medical applications which is crosslinked by irradiating, with an electron beam, said resin molded article comprising 100 parts by weight of (A) syndiotactic 1,2-polybutadiene having a crystallinity of 5% or more, 0 parts by weight of (B) at least one thermoplastic polymer selected from the group of polypropylene, a styrene-butadiene-styrene block copolymer, a styrene-isoprene-styrene block copolymer, a hydrogenerated styrene-butadiene-styrene block copolymer, a hydrogenated styrene-isoprene-styrene block co-polymer, a polybutadiene other than the syndiotactic 1,2-polybutadiene, an acrylonitrile-butadiene-styrene resin, a polyisoprene, a polyethylene, an ethylene-vinyl acetate copolymer, an ethylene-acrylate ester copolymer and an ethylene-methacrylate copolymer, with the proviso that (A)+(B)=100 parts by weight, in which the irradiation dose of the electron beam is from 5 to 200 in Mrad, in which the energy of the electron beam is from 20 to 5,000 kV, wherein the tensile stress at the 50% point of the tensile strength curve of the irradiated resin molded article, as measured in MPa, is from 1.01 to 2.5 times the tensile stress at the 50% point of the tensile strength curve, as measured in MPa, of the resin molded article, and wherein the irradiated resin molded article has steam sterilization resistance.