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US 6,582,786 B1Granted
Flexible membranes
AssigneeNIKE, Inc.
InventorsHenry W. Bonk, David J. Goldwasser, Paul H. Mitchell
Life of this patent
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Abstract
Described is a membrane comprising a microlayer polymeric composite having at least about 10 microlayers. The microlayers are each individually up to about 100 microns thick and alternate between at least one fluid barrier material and at least one elastomeric material. The membrane can be formed into a pressurized bladder or cushioning device for many applications, including footwear and hydropneumatic accumulators.
Claims56
A durable membrane, comprising a microlayer polymeric composite,
- wherein said microlayer polymeric composite comprises at least about 10 microlayers, each microlayer individually being up to about 100 microns thick, comprising first microlayers comprising a first polymeric material and second microlayers comprising a second polymeric material;
- wherein the first polymeric material comprises a member selected from the group consisting of thermoplastic polyester diol-based polyurethanes, thermoplastic polyether diol-based polyurethanes, thermoplastic polycaprolactone diol-based polyurethanes, thermoplastic polycarbonate diol-based polyurethanes and combinations thereof;
- and
- wherein the second polymeric material comprises a member selected from the group consisting of ethylene-vinyl alcohol copolymers, poly(vinylidene chloride), acrylonitrile copolymers, poly(ethylene terephthalate), polyamides, crystalline polymers, polyurethane engineering thermoplastics, and combinations thereof.
1 more element
Dependencies are inferred from the claim text.