Composite material and method of making same

Details Composite material and method of making same Composite material and method of making same

1985-09-12

1990-06-19

Buffalow, Edith

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

428253, 428520, 428911, 428913, 2159, B32S 2708

Patent

active

049353080

ABSTRACT:
A protective material comprising a layer of vinylidene chloride or saran or copolymer of vinylidene chloride between two layers of polyethylene to provide protection against both permeation and breakthrough. A cloth backing or inner layer can be added to this material for comfort. The material can be modified with a reinforcing material such as fiberglass or scrim cloth. Inclusion of an indicator substance between layers, or impregnated in a layer, provides further protection by warning the user of permeation and breakthrough. This material can be utilized in protective clothing such as gloves, as enclosures for instruments and equipment, as a container, and in other applications. The material is preferably formed by first surface treating one or more layers of polyethylene and/or vinylidene chloride or saran with a solution comprising any hexavalent chromium compound such as a chromate or chromium trioxide in hydrogen ion such as supplied from sulfphuric acid, and then pressing the layers of vinylidene chloride and polyethylene together under heat and pressure such as 330 degrees Fahrenheit at 400 PSI.

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