Patent ID: 7217452
Filing Date: 2007-05-15
Classification: B32B,C09K,Y10T

Abstract:
1. An elastomer-bonded sealing sheet material, comprising: a first layer of a thickness of about 100 μm to about 4 mm, said first layer comprising a vulcanized elastomer and a fiber-containing filler bonded to said elastomer, said filler constituting at least 30 weight % of said first layer, a second layer of a thickness of about 100 μm to about 4 mm, said second layer comprising an R-rubber vulcanized elastomer and a fiber-containing filler bonded to said elastomer, said filler constituting at least 30 weight % of said second layer, said vulcanized elastomer of said first layer having been formed from a non-vulcanized elastomer having a backbone with not more than 10% unsaturated double bonds, and said first and second layers being firmly bonded to each other by vulcanization.