Chemically protective laminate
AssigneeW. L. Gore & Associates, Inc.
InventorsGordon L. McGregor, Richard Winkelmayer, Jr.
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Abstract
A chemically protective laminate comprising a thin thermoplastic barrier layer, having a consistent thickness, laminated between two porous polymeric membrane layers. The porous polymeric membrane may be of porous polytetrafluoroethylene, preferably expanded porous polytetrafluoroethylene. The chemically protective laminate may be subsequently adhered to a backing to form a fabric laminate capable of being assembled into a chemically protective article.
Claims10
A chemically protective laminate comprising, in sequence:
- (a) a layer of porous polytetrafluoroethylene,
- (b) a thin layer of a thermoplastic barrier polymer having a thickness of between 51 microns and 130 micron and being adhered on a first side to the layer of porous polytetrafluoroethylene, said thin layer having a consistent thickness represented by a true coefficient of variation of 16.7% or less,
- (c) a second layer of porous polytetrafluoroethylene located on the other side of layer (a),
- (d) a backing layer adhered to one of the porous polytetrafluoroethylene layers.
A process for producing a chemically protective laminate, comprising, in sequence, the steps of:
- (a) interposing a thin layer of a thermoplastic barrier polymer between two layers of porous polytetrafluoroethylene,
- (b) melting the thin layer of a thermoplastic barrier polymer, and,
- (c) adhering a backing layer to one of the porous polytetrafluoroethylene layers.
Dependencies are inferred from the claim text.