Thermoformable, multi-layer plastic sheet having gas barrier pro

Details Thermoformable, multi-layer plastic sheet having gas barrier pro Thermoformable, multi-layer plastic sheet having gas barrier pro

1985-09-19

1987-07-21

Buffalow, Edith

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428349, 428516, 428517, 428518, 428522, 428520, 156245, B32B 702

Patent

active

046817972

ABSTRACT:
A thermoformable, multi-layer plastic sheet with gas barrier properties is disclosed having an inner gas barrier layer, a glue layer applied to either side of the gas barrier layer and layers of a polyolefin composition bonded to the glue layers. To increase the tensile strength of the sheet during heating for the purpose of thermoforming, a second polyolefin layer is bonded to at least one of the two polyolefin layers, the second polyolefin layer having a lower melt index than the layer of the polyolefin composition beneath it.

REFERENCES:
patent: 3673050 (1972-06-01), Newman et al.
patent: 4532189 (1985-07-01), Mueller
patent: 4567090 (1986-01-01), Ohya et al.

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