Patent ID: 6491975
Filing Date: 2002-12-10
Classification: D06B,D06M,Y10S

Abstract:
A process for making a bonded sewing thread with aqueous-based bonding agents using a foam delivery system, said process comprising the steps of(a) providing a multi-ply filament structure; (b) foaming a liquid stream comprising water and a bonding agent by use of a gas stream, said bonding agent being selected from the group consisting of at least one polyethylene terephthalate bonding agents, and a mixture of polyethylene terephthalate and polyurethane bonding agents, to provide an aqueous foam; (c) thereafter applying said aqueous foam to said multi-ply filament structure; and (d) thereafter heat-treating the foam-coated, multi-ply filament structure at a temperature of 160 degrees C. or more, to make a bonded sewing thread comprising said multi-ply filament structure.