Patent ID: 6187432
Filing Date: 2001-02-13
Classification: C09J,Y10T

Abstract:
A process for forming a composite pressure sensitive adhesive on the surface of a substrate, comprising:(A) depositing a discontinuous layer of a pressure sensitive adhesive material on said substrate, said pressure sensitive adhesive material being in the form of a hot melt adhesive, solution or emulsion, said discontinuous layer of said pressure sensitive adhesive material covering parts of said substrate and leaving parts of said substrate exposed; and(B) depositing a continuous layer of another pressure sensitive adhesive material on said discontinuous layer of said pressure sensitive adhesive material from step (A) and on the exposed parts of said substrate using proximity coating or non-contact coating; said discontinuous layer from step (A) being in the form of a hot melt adhesive, solution or emulsion during step (B); said another pressure sensitive adhesive material being in the form of a hot melt adhesive, solution or emulsion during step (B); said adhesive materials used during steps (A) and (B) being sufficiently non-soluble relative to each other so that at least about 50% by weight of said pressure sensitive adhesive material from step (A) remains in said discontinuous layer.