Process for making a bonded sewing thread with aqueous based bonding agents via foam delivery system
AssigneeArteva North America S.A.R.L.
InventorsTimothy L. Burns, Douglas E. Hirt, Joseph A. Roderiguez
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Abstract
A process for bonding filament with aqueous based polyethylene terephthalate or polyurethane bonding agents via a foam delivery system is disclosed. The process includes the steps of: (a) providing a filament; (b) providing a foam prepared by foaming a solution comprising an agent selected from the group consisting of polyethylene terephthalate or polyurethane bonding agents; (c) applying a foam to said filament; and (d) drying and curing said filament.
Claims10
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.
Dependencies are inferred from the claim text.