Plastic skin envelopes for glass bottles and the like

Details Plastic skin envelopes for glass bottles and the like Plastic skin envelopes for glass bottles and the like

1977-02-07

1977-09-20

Van Balen, William J.

Bottles and jars

Multilayer barrier structure

Coating or lamination

428 35, 428215, 428314, 428315, 428441, 428913, B65D 1116, B65D 2308

Patent

active

040491471

ABSTRACT:
A method of producing a lightweight, strong, uniform, foamed layer containing tubular film with good opacity which can be heat-shrunk onto an annular substrate such as a glass bottle rapidly and uniformly is accomplished by co-extruding a low density polyethylene and a mixture of an ethylene polymer and a blowing agent under particular conditions and causing the blowing agent to decompose thereby foaming the ethylene polymer.

REFERENCES:
patent: 3341480 (1967-09-01), Field
patent: 3604584 (1971-09-01), Shank, Jr.
patent: 3607603 (1971-09-01), Coverdale, Jr.
patent: 3979000 (1976-09-01), Karabedian

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