Patent ID: 7582352
Filing Date: 2009-09-01
Classification: B32B,Y10T

Abstract:
1. A foamed laminate based on olefin in which a substrate layer is laminated with a non-foamed skin layer, wherein the foamed laminate is a co-extruded product in which the substrate layer and the skin layer are heat fused and the substrate layer is foamed by co-extrusion by multilayer extrusion molding machine, wherein said substrate layer comprises a foamed body (X said skin layer comprises an ultrahigh molecular weight polyolefin resin (Y), wherein said ethylenic, thermoplastic elastomer (A) consists of a thermoplastic elastomer obtained by subjecting a mixture of the polyethylene resin (a-1) and the copolymer based on ethylene/α-olefin (a-2) to a dynamic heat treatment in the absence of a cross-linking agent, and wherein said copolymer based on ethylene/α-olefin (a-2) is a copolymer of ethylene, an α-olefin and, optionally incorporated, non-conjugated polyene and has a Mooney viscosity ML wherein the ethylenic thermoplastic elastomer (A) is one which has a compression set of 60% or less as determined according to JIS K 6262 (at 70° C., 22 hours) and a melt flow rate of 0.1 g/10 min. or higher as determined according to JIS K 7120 (at 230° C., 10 kg load), and wherein the foamed body (X wherein the foamed laminate is formed by co-extrusion of the foamable ethylenic thermoplastic elastomer composition (X wherein said ultrahigh molecular weight polyolefin resin (Y) is one which has an intrinsic viscosity (η) of 3.5-8.3 dl/g as determined in decalin at 135° C.