| 摘要 |
PURPOSE:The titled molded article having high bond strength at interfaces, consisting of a first and a second molded article parts made of a hard thermoplastic polymer blended with a peroxide and a middle molded article part made of a styrene-butadiene-styrene copolymer elastomer crosslinked with the peroxide. CONSTITUTION:(A) An inner molded article part 1 and an outer molded article part 2 are molded from a plastic composition obtained by blending (i) a hard thermoplastic polymer (e.g., polypropylene, etc.,) with (ii) a peroxide (e.g., di-alpha- cumyl peroxide, etc.,) and (B) a middle molded article part 3 is made to a styrene-butadiene-styrene copolymer elastomer crosslinkable with the peroxide of the component A to give the aimed plastic molded article. These molded articles have high bond strength at interfaces and since strain caused by stress at the interfaces is lessened, the aimed plastic molded article is excellent as a vibration insulator.
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