Gas-filled cushioning device
AssigneeBASF Coatings GmbH
InventorsHenry W. Bonk, David Goldwasser
Life of this patent
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Abstract
A shoe is fabricated from an upper structure and a sole structure wherein the sole structure contains a gas-filled cushioning device composed of a multi-layer film formed into a gas-filled membrane having an interior compartment enclosing at least one capture gas. The multi-layer film comprises an outer layer of an elastomeric thermoplastic material such as a polyurethane, an inner layer of an elastomeric thermoplastic material such as a polyurethane and a barrier layer interposed therebetween which is derived from a combination of at least one ethylene-vinyl alcohol copolymer and up to about 50 wt. % of an aliphatic thermoplastic urethane.
Claims10
A gas-filled cushioning device, comprising:
- a multi-layer film formed into a gas-filled membrane having an interior compartment containing at least one capture gas constituent,
- said multi-layer film including a first layer comprising a combination of at least one aliphatic thermoplastic urethane and at least one copolymer of ethylene and vinyl alcohol, wherein the first layer includes up to about 50 wt. % of aliphatic thermoplastic urethane, and a second, outer layer comprising a flexible resilient elastomeric thermoplastic material,
- said multi-layer film being capable of selectively resisting an outward diffusion of said capture gas constituent and permitting an inward diffusion pumping of at least one mobile gas constituent.
Dependencies are inferred from the claim text.