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AssigneeJsr Corporation
InventorsKentarou Kanae, Hideo Nakanishi, Minoru Tanaka
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A molded composite comprising a first molded part 11 and a second molded part 12 which is bonded to the surface and/or a cross-sectional surface of the first molded part 11 is disclosed. The first molded part 11 is obtained by extrusion foam molding of an olefin thermoplastic elastomer composition, comprising (A) an ethylene-α-olefin copolymer rubber having an intrinsic viscosity [η] of 3.5 to 6.8 dl/g as measured at 135° C. in a decalin solvent, (B) a polyolefin resin, and (C) a mineral oil-based softener in a predetermined proportion and obtained by dynamically heat-treating a mixture of at least (A) the ethylene-α-olefin copolymer rubber and (B) the polyolefin resin in the presence of a cross-linking agent, at an expansion ratio of 1.2 times or more and the second molded part 12 is obtained by injection molding of the olefin thermoplastic elastomer composition and/or another thermoplastic elastomer composition and bonded to the surface and/or a cross-sectional surface of the first molded part 11.
A molded composites, comprising:
A process for producing a molded composite comprising a step of obtaining a molded member having an expansion ratio of 1.2 times or more by extrusion foam molding of an olefin thermoplastic elastomer composition, which comprises 5 to 60 mass % of (A) an ethylene-α-olefin copolymer rubber having an intrinsic viscosity [η] of 3.5 to 6.8 dl/g as measured at 135° C. in a decalin solvent, 1 to 20 mass % of (B) a polyolefin resin, and 30 to 94 mass % of (C) a mineral oil-based softener ((A)+(B)+(C)=100 mass %) and obtained by dynamically heat-treating a mixture of at least (A) the ethylene-α-olefin copolymer rubber and (B) the polyolefin resin in the presence of a cross-linking agent, a step of placing the resultant molded member in a die cavity so that the surface and/or the cross-sectional surface thereof are exposed, and a step of introducing the olefin thermoplastic elastomer composition and/or another thermoplastic elastomer composition into the die cavity by injection.
Dependencies are inferred from the claim text.