Pressure sensitive adhesive material and method of preparation

摘要: The present invention provides a process for making water vapor permeable pressure sensitive adhesive material which comprises forming on surface is poorly wettable (or non-wettable) by water, continuous coating of an aqueous emulsion based having dispersed therein immiscible organic liquid more volatile than and does not break the emulsion; leaving at room temperature until pores develop reach size such that when dried will have permeability from 2000 to 10,000 units as hereinafter defined; drying higher transferring mass backing material. finds use in medical surgical fields especially first-aid dressings tapes.