| 摘要 |
The thermoplastic elastomer composition in the present invention comprises an ethylene.alpha-olefinic copolymeric rubber (A) whose intrinsic viscosity [eta] determined at 135° C. in decalin solvent is 3.5 to 6.8 dl/g, a mineral oil-based softener (B), an alpha-olefinic crystalline polymer (C) whose degree of crystallinity is 50% or higher and an alpha-olefinic amorphous polymer (D) whose melt viscosity at 190° C. is 50,000 cPs or less and whose degree of crystallinity is less than 50%, and at least a part of a mixture containing 20 to 63% by mass of the (A), 35 to 78% by mass of the (B), 1 to 12% by mass of the (C) and 1 to 12% by mass of the (D), based on 100% by mass of the total of the components (A), (B), (C) and (D), is crosslinked.
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