Patent ID: 6656567
Filing Date: 2003-12-02
Classification: B32B,C09J,Y10T

Abstract:
An adhesive sheet which comprises a film substrate layer; a channel breathing layer comprising a binder having a modulus of elasticity in the range from 1Ã—109 to 1Ã—1012 dyn/cm2, which has a plurality of convex parts on the surface part of the layer and in which a concave part interposed between said convex parts forms a channel communicating with outside; and a breathing adhesive layer, laminated sequentially in that order such that gas from an adherend can pass through the breathing adhesive layer and escape through the channel to outside wherein said channel breathing layer further comprises a plurity of beads having a modulus of elasticity in the range from 1Ã—108 to 1Ã—1013 dyn/cm3.