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

1974-01-14

1977-07-05

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

215 12R, 264 54, 264173, 264230, 264321, 264DIG5, 264DIG71, 428 35, 428315, 428910, 428913, B29C 2720, B29D 2700, B65D 1116

Patent

active

040339297

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:
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patent: 2980963 (1961-04-01), Makowski
patent: 3126680 (1964-03-01), Baird et al.
patent: 3448182 (1969-06-01), Derbyshire et al.
patent: 3470046 (1969-09-01), Verdin
patent: 3473682 (1969-10-01), Studen
patent: 3551540 (1970-12-01), Pellicciari et al.
patent: 3604584 (1971-09-01), Shank
patent: 3608006 (1971-09-01), Hosoda et al.
patent: 3611669 (1971-10-01), Shepherd
patent: 3760046 (1973-09-01), Schwartz et al.
patent: 3767496 (1973-10-01), Amberg et al.
patent: 3878960 (1975-04-01), Jonsson
patent: 3906070 (1975-09-01), Lajovic
patent: 3979000 (1976-09-01), Karabedian

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