Laminated products of olefinic thermoplastic elastomer and constructional gaskets

摘要

The present invention relates to a laminate comprising an olefinic thermoplastic elastomer which comprises: (a) a substratum layer comprising an olefinic thermoplastic elastomer composition(A) having the following characteristics 1 &cir& to 3 &cir& : 1 &cir& 9 wherein X denotes the JIS A-hardness value (a dimensionless value) of the olefinic thermoplastic elastomer composition determined according to the prescription of JIS K6301 and Y represents the compression set value (expressed by %) of the olefinic thermoplastic elastomer composition determined according to the prescription of JIS K6301 under a condition of 70 DEG C and 22 hours, 2 &cir& a tensile strength value in the range from 5 to 30 MPa determined according to the prescription of JIS K6301 and 3 &cir& an elongation set value of 18% or less determined according to the prescription of JIS K6301, and (b) a surface skin layer comprising an ultra high molecular weight polyolefin composition(B) having an intrinsic viscosity Ä eta Ü measured in decalin at 135 DEG C in the range from 3.5 to 8.3 dl/g; and a constructional gasket comprising the olefinic thermoplastic elastomer composition(A).