Patent ID: 6287638
Filing Date: 2001-09-11
Classification: B29C,B29K,B29L,B30B,B32B,B41N,Y10S

Abstract:
A process for forming a compressible layer by vulcanization which comprises:dispersing substantially uniformly throughout an elastomeric matrix a plurality of thermoplastic microspheres that remain stable and have a melting temperature which is higher than that of the vulcanization;applying at least one coating of said microsphere containing elastomeric matrix at a substantially uniform thickness to a surface of a base fabric ply to form a coated base fabric ply; andvulcanizing said coated base fabric ply at a temperature of about 80-150.degree. C. for a time sufficient to substantially fix the position of said thermoplastic microspheres within said matrix and form a compressible layer such that said microspheres provide substantially uniform compression characteristics to said layer.