| abstract |
A molded article of a thermoplastic elastomer composition, the molded article having excellent elasticity and extremely reduced compression set. The molded article of a thermoplastic elastomer composition is obtained by irradiating with electron beams a molded article comprising as the main component a thermoplastic elastomer composition which comprises an ethylene/α-olefin copolymer (1) as a matrix, a crystalline polyethylene resin (2), and a conjugated diene block copolymer (3) and in which the resin (2) and the copolymer (3) have a three-dimensional network structure in the matrix. Also provided is a process for producing a molded article of a thermoplastic elastomer composition which comprises mixing an ethylene/α-olefin copolymer (1), a crystalline polyethylene resin (2), and a conjugated diene block copolymer (3), dynamically treating the mixture with heat to obtain a thermoplastic elastomer composition, molding the thermoplastic elastomer composition, and then irradiating the molding with electron beams. |