Laminate system for a durable controlled modulus flexible membrane
AssigneeWarwick Mills, Inc.
InventorCharles Howland
Life of this patent
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Abstract
A fabric system for producing at least a woven fabric of controlled modulus or elongation in the MD or warp axis, has a core layer which is the main structural element, and may have one or more woven cover fabrics adhesively bonded with an off axis configuration to one or both sides of the core layer. In a preferred embodiment the core fabric is covered with at least one off axis fabric on both sides. The cover fabrics may also have resin or film top layers laminated or coated on their outside surfaces, for mechanical performance or UV protection or both.
Claims21
A flexible laminate system with angularly distributed, controlled modulus threadlines comprising:
- a flexible core layer with yarn spacing of greater than 15 epi and up to 30 epi in the MD, and having an elongation in the MD of less than 0.25 percent at 10 lbf/inch and less than 0.5 percent at 50 lbf/inch;
- and
- at least one fabric cover layer oriented with its respective threadlines at a bias angle with respect to the threadlines of said core layer, said cover layer being bonded to said core layer and having a resin top coating applied thereto.
A flexible laminate system with angularly distributed, controlled modulus threadlines comprising:
- a flexible core layer with yarn spacing up to 30 epi in the MD, elongation in the MD of less than 0.25 percent at 10 lbf/inch and less than 0.5 percent at 50 lbf/inch, and yarn spacing of at least 15 epi in the CM and elongation in the CM of not more than 0.5 percent at 10 lbf/inch,
- said core layer comprising fibers from among the group of fibers consisting of polyaromatic amide, polyethylene, Carbon, multifilament liquid crystal polymer, PBO, para-aramid, Polyester, PEN, aramid polymer, and Nylon or polyamide fiber;
- and
- at least two fabric cover layers comprising polyester yarn and oriented to said core layer with their respective threadlines at a bias angle with respect to the threadlines of said core layer, said cover layers being bonded to said core layer and having a resin top coating applied thereto, said layers of said laminate system being adhesively bonded together, said laminate system further comprising defined inner and outer surfaces, and having at least one film top layer bonded to said outer surface.
A flexible laminate system with angularly distributed, controlled modulus threadlines comprising:
- a fabric core layer and at least two fabric cover layers, said core layer having less than two percent crimp in the MD and elongation in the MD of less than 0.25 percent at 10 lbf/inch, said core layer comprising thermoplastic multifilament liquid crystal polymer yarn and polyester yarn alternated in a modified weave pattern, and having at least 21 epi in the CM, with elongation in the CM of not more than 0.5 percent at 10 lbf/inch, said cover layers comprising a woven polyester yarn fabric of at least 50×50 epi with resin coating, cut and formed with a bias angle with respect to said core layer, a said cover layer adhesively bonded to each side of said core layer, and an aliphatic urethane resin top coating applied to each said cover layer.
Dependencies are inferred from the claim text.