Patent ID: 7189763

Claim:
A crosslinked olefin elastomer foam, which is a crosslinked foam obtained by heating an olefin elastomer composition, the olefin elastomer composition comprising: 70 to 95 parts by weight of an ethylene/α-olefin copolymer (A) having a density of 0.88 to 0.92 g/cm 3 and a melt flow rate (measured at 190° C. under a load of 2.16 kg in accordance with ASTM D 1238) of 0.1 to 10 g/10 min, and 5 to 30 parts by weight of a modified polyolefin (B) obtained by grafting a polyolefin with an unsaturated carboxylic acid or a derivative thereof, provided that the sum of ethylene/α-olefin copolymer (A) and modified polyolefin (B) is 100 parts by weight; an organic peroxide (D); a crosslinking auxiliary (E); and a foaming agent (F); wherein the ethylene/α-olefin copolymer (A) comprises a mixture of: 5 to 95 parts by weight of an ethylene/α-olefin copolymer (A1) having a density of greater than 0.88 g/cm 3 but not greater than 0.90 g/cm 3 and a melt flow rate (measured at 190EC under a load of 2.16 kg in accordance with ASTM D 1238) of 0.1 to 50 g/10 min, and 5 to 95 parts by weight of an ethylene/α-olefin copolymer (A2) having a density of 0.90 to 0.93 g/cm 3 and a melt flow rate (measured at 190EC under a load of 2.16 kg in accordance with ASTM D 1238) of 0.1 to 50 g/10 min, provided that the sum of ethylene/α-olefin copolymer (A1) and ethylene/α-olefin copolymer (A2) is 100 parts by weight, the mixture having a melt flow rate (measured at 190EC under a load of 2.16 kg in accordance with ASTM D 1238) of 0.5 to 10 g/10 min.