Patent ID: 6830802
Filing Date: 2004-12-14
Classification: B32B,D06N,E04D,Y10T

Abstract:
A roofing membrane, comprising:at least one support layer; a plurality of first strips arranged in spaced-apart disposition on at least one side of the support layer and made of bituminous material, wherein the first strips of bituminous material have a penetration depth between about 120 and 170 at a temperature of 50Â° C., and a softening point between about 100Â° C. and 110Â° C., wherein the first strips include about 65% of straight-run bitumen, about 15% of oxidation bitumen, about 10% of block polymer styrene butadiene, and about 10% of oleresins; a layer of scattered material separating the first strips from one another; and a fusible film which covers the first strips of bituminous material, said film being composed of a plurality of second strips which are oriented in parallel relationship to the first strips but not interconnected.