Composite films free from metal layers

Details Composite films free from metal layers Composite films free from metal layers

1990-03-19

1992-09-08

Buffalow, Edith L.

Exercise devices

Gymnastic

Play area climbing or traversing arrangement

4284758, 4284761, 4284763, 428518, B29D 2200

Patent

active

051457318

ABSTRACT:
The composite film contains individual layers of polyvinyl alcohol, a polyolefin, an ethylene/vinyl alcohol and a polyolefin in that order and is comparable in its barrier properties to water vapor and gas with composite films containing metal layers without having any of their disadvantages.

REFERENCES:
patent: 3136657 (1964-06-01), Dixler et al.
patent: 4284674 (1981-08-01), Sheptak
patent: 4684573 (1987-08-01), Mueller et al.
patent: 4692361 (1987-09-01), Johnston
patent: 4746562 (1988-05-01), Fant

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