COHESIVELY FAILING HOT MELT PRESSURE SENSITIVE ADHESIVE

摘要

A hot melt pressure sensitive adhesive comprising a) from about 15 % to about 40 % by weight of a block copolymer having a coupling efficiency of less than about 75 %; b) from about 20 % to about 50 % by weight of a tackifying resin selected from the group consisting of those tackifying resins having a softening point of less than about 100 DEG C; c) from about 30 % to about 50 % by weight of a plasticizing oil; and d) up to about 15 % of a compatible polymer wherein the total polymer content does not exceed 40 % by weight of the adhesive wherein the hot melt pressure sensitive adhesive fails cohesively during use.