Development of Heat Sealable Sewing Thread and Process

Period of Performance: 01/01/1989 - 12/31/1989

$157K

Phase 2 SBIR

Recipient Firm

Springborn Labs, Inc.
10 SPRINGBORN CTR
Enfield, CT 06082
Principal Investigator

Abstract

A PHASE I PROGRAM WITH NRDEC DEMONSTRATED THE FEASIBILITY OF THE BASIC CONCEPT OF COATING A SEWING THREAD WITH HOT MELT ADHESIVE, USING THE COATED THREAD TO SEW A GORE-TEX/SHELL FABRIC LAMINATE, AND THEN SEALING THE RESULTING NEEDLE HOLES BY APPLICATION OF HEAT. THIS PHASE II PROGRAM WILL DEVELOP A SEWING AND IN-LINE SEALING PROCESS USING A "UNIVERSAL" HEAT SEAL COATING. THIS PROCESS AND COATING WILL BE ADAPTABLE TO A VARIETY OF COATED FABRICS FOR MILITARY USE INCLUDING GORE-TEX COATED NYCO AND NOMEX/KEVLAR, VINYL COATED POLYESTER TENTAGE, AND NEOPRENE COATED FABRICS. A VARIETY OF COATING RESINS WILL BE SCREENED FOR ADHESION TO THE DESIRED SUBSTRATES, FLOW OUT, AND SURFACE FRICTION. COATED THREAD WILL BE USED TO SEW AND SEAL FABRIC SAMPLES WHICH WILL BE SUBJECTED TO HYDROSTATIC TESTING. PROTOTYPE IN-LINE SEALING CONCEPTS WILL BE TESTED AND THE MOST PROMISING USED AS THE BASIC FOR A PROTOTYPE SEW AND SEAL UNIT. A SET OF UNIFORMS, SEWN AND SEALED WITH THE FINAL MATERIAL/PROCESS, WILL BE SUBMITTED TO NRDEC FOR WEAR TESTING.