Cushioning device with improved flexible barrier membrane

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

1994-08-31

1999-09-14

Dye, Rena L.

Stock material or miscellaneous articles

Hollow or container type article

Nonself-supporting tubular film or bag

428 366, 428 367, 428 368, 428 76, 428215, 428220, 4284228, 4284242, 36 28, 36 30R, 36 44, B29D 2200, A43B 1340

Patent

active

059520655

ABSTRACT:
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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