Barrier fabric and method
AssigneeReemay, Inc.
InventorsJerry A. Dunaway, Leon H. Zimmerman, Nancy T. LaTondress
Life of this patent
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Abstract
A barrier fabric is provided which is impermeable to liquids and permeable to vapor. A polymer film is laminated to a porous fibrous web. The composite web is then needled repeatedly with fine conical needles to provide micropores through the film.
Claims12
Method of producing a barrier fabric which is permeable to liquid vapors and impermeable to liquids, said method comprising the steps of first laminating a vapor impermeable polymer film to a reinforcing porous fibrous web to provide a composite web and then needl.ing the film of the composite web with tapered needles to provide a plurality of micropores through said film, said micropores being sufficiently small to prevent substantial transmission of liquids and sufficiently large to permit transmission of vapors.
A barrier fabric comprising a porous fibrous layer, a moisture impermeable film laminated to said fibrous layer to provide a composite fabric, and a plurality of punctures through said film, said punctures being of a size sufficient to allow the transmission of water vapor and of a size insufficient to allow substantial penetration of liquid water.
Method of producing a fabric with limited permeability, said method comprising the steps of first laminating a vapor impermeable polymer film to a reinforcing porous fibrous web to provide a composite web, and then needling the film of the composite web with tapered needles to provide a plurality of micropores through said film.
A method for transporting rolls of fabric comprising the steps of first assembling a plurality of rolls of fabric into a bundle around a hollow tube which is coextensive with the rolls and wherein the rolls are arranged in a stable geometrical pattern around the tube, securing the bundle, and lifting and transporting the bundle by inserting a support into the hollow tube.
Dependencies are inferred from the claim text.