Patent ID: 6555509
Filing Date: 2003-04-29
Classification: A61K,A61Q,C11D

Abstract:
A solid toilet cleansing or cosmetic article, comprising:at least two layers, and a preformed membrane layer positioned therebetween for separating and adhesively bonding said layers; wherein said layers may be the same or different; and wherein the at least two layers are opaque; each of said layers having a yield stress value from about 20 KPa to about 400 KPa at 25Â° C. and 50% RH; said membrane is selected from a material that is at least partially water-soluble, at least partially water-dispersible, a water insoluble, non-thermoplastic, shearable material; and a water insoluble, thermoplastic, shearable material; said membrane being worn away as the toilet article is used; and said membrane is formed from a process selected from solution casting, dispersion casting, molding and extrusion prior to inserting said membrane between said layers; and said non-thermoplastic shearable material is selected from hydrocarbon or silicone waxes, natural and synthetic resins, and derivatives and blends thereof.