Composite chemical barrier fabric for protective garments
AssigneeE. I. Du Pont de Nemours and Company
InventorsErnst J. Hauer, Stasys K. Rudys, James P. Zeigler
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Abstract
Composite chemical barrier films and fabrics that are particularly useful in protective garments. The composite barrier material may be made by laminating a barrier film to a flexible substrate using a thermoplastic resin and topcoating the barrier film with a similar or dissimilar thermoplastic resin to allow fabric seaming when the fabric is fabricated into a protective garment. Protective garments made from the materials are lightweight while maintaining an adequate balance of strength and chemical protection.
Claims10
A chemical protective garment comprising a plurality of interconnected protective material pieces, each of said protective material pieces consisting essentially of:
- (a) a point bonded non-woven, flexible, reinforcing, fabric substrate:
- (b) a barrier film selected from the group consisting of oriented nylon, polyethylene terephthalate, and polyethylene naphthalate films laminated to the fabric substrate by a thermoplastic polymeric adhesive layer;
- and (c) a thermoplastic polymeric adhesive topcoat adhered to the unlaminated side of the barrier film, the protective material pieces of the garment having a burst strength of at least 75 psi, a chemical barrier rating of at least 50 when the barrier film is less than 0.5 mils thick, and a chemical barrier rating of at least 75 when the barrier film is greater than 0.5, but less than 1.3 mils thick.
Dependencies are inferred from the claim text.