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US 9,222,611 B2Granted
Flexible barrier composite fabrics via an adhered film process
AssigneeDartex Coatings, Inc.
InventorThomas C. Colasanto
Life of this patent
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Abstract
A composite fabric includes: a fabric backing; an adhesive layer; a midlayer barrier bonded to the fabric backing by the adhesive layer; and an external barrier bonded to the midlayer barrier, wherein the composite fabric has a hydrostatic pressure resistance of at least 100 psi and is sufficiently flexible such that it can be formed into a tube and everted. A process and an apparatus for producing the composite fabric are also disclosed. The composite fabric is particularly suitable for use as a liner in a cured-in-place pipe repair method.
Claims25
A composite fabric comprising:
- a fabric backing;
- an adhesive layer bonded to the fabric backing such that the fabric backing protrudes into and through the adhesive layer;
- a midlayer barrier bonded to the fabric backing by the adhesive layer;
- and
- an external barrier bonded to the midlayer barrier, wherein the external barrier consists essentially of a layer of a pre-formed polymeric film selected from the group consisting of an extruded thermoplastic polyurethane film, a natural or synthetic rubber file, a polyamide film and a polyolefin film,
- wherein the composite fabric has a hydrostatic pressure resistance of at least 100 psi and is sufficiently flexible such that it can be formed into a tube and everted.
3 more elements
Dependencies are inferred from the claim text.