Cushioning device with improved flexible barrier membrane

Details Cushioning device with improved flexible barrier membrane Cushioning device with improved flexible barrier membrane

B - Operations, Transporting

32

B

B32B 27/08 (2006.01) A43B 13/20 (2006.01) B29C 47/06 (2006.01) B32B 3/08 (2006.01) B32B 3/26 (2006.01) B32B 27/40 (2006.01) B32B 33/00 (2006.01) C08J 5/12 (2006.01)

Patent

CA 2157212

Products in the form of cushioning devices made from flexible membranes employing at least one layer including thermoplastic urethane and at least one layer of a copolymer of ethylene and vinyl alcohol are inflatable to a relatively high pressure. The cushioning devices maintain the internal inflatant pressure for extended periods of time by employing a phenomenon referred to in the industry as diffusion pumping. Ideally, the cushioning devices of the present invention can be permanently inflated with gases such as nitrogen or air.

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