Process for making high moisture barrier polyvinyl chloride film

Details Process for making high moisture barrier polyvinyl chloride film Process for making high moisture barrier polyvinyl chloride film

1974-10-11

1978-05-09

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264210R, 264211, B29D 724, B29C 1702

Patent

active

040887251

ABSTRACT:
A process for making a self-supporting, plasticized, uncoated polyvinyl chloride film wherein a melt containing polyvinyl chloride resin and additives, including a resin plasticizer and from about 0.5 to 4.0 parts per hundred based upon the weight of the polyvinyl chloride resin of a moistureproofing paraffin wax, is extruded as a continuous film. Such film may then be elongated while within an orientation temperature range and then cooled to a temperature below such orientation temperature range while held under tension.

REFERENCES:
patent: 2435464 (1948-02-01), Radcliffe
patent: 2445727 (1948-07-01), Kinzinger
patent: 3284389 (1966-11-01), Kane
patent: 3567669 (1971-03-01), Georgiana et al.
patent: 3600309 (1971-08-01), Loser et al.
patent: 3639554 (1972-02-01), Hutt
patent: 3659000 (1972-04-01), Cronk
patent: 3682924 (1972-08-01), Blanchard

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