Sanwa Kako Company Limited

Masaaki Sahara

Isamu Takimoto

A crosslinked ethylene-olefin copolymer foam and a method for the production thereof are disclosed. The foam having a gel content of 70 to 99%, an apparent density of 0.2 to 0.02 g/cm,, 25% compression set at 40&deg; C. of 0.1 to 20.0%, 25% compression hardness of 0.1 to 1.0 kgf/cm,, and Asker C type surface hardness of 3 to 40 is foamed from a copolymer of ethylene and &agr;-olefin having 3 to 18 carbon atoms, the copolymer having a melt flow rate (MFR) of 0.1 to 100 g/10 minutes, a critical shear rate (CSR) satisfying the equation: log&lsqb;CSR&rsqb;&lE;2.48&plus;0.500&times;log&lsqb;MFR&rsqb;, a density of 0.860 to 0.935 g/cm,, a Q value determined by the size exclusion chromatography (SEC) of 1.5 to 4, and an extrapolated end temperature of melting (Tem) of 65&deg; C. to 130&deg; C.

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Himeji, Japan

Masaaki Sahara