Method of making an oriented polymeric film

Details Method of making an oriented polymeric film Method of making an oriented polymeric film

1983-10-14

1985-12-10

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

15624424, 4284744, 4284755, 4284758, 428516, B29D 702

Patent

active

045577803

ABSTRACT:
Molecularly oriented plastic films have five molecularly oriented layers. A first layer provides a barrier to gaseous transmission through the film and has a composition of 0% to 50% nylon or nylon copolymer, and conversely 50% to 100% ethylene vinyl alcohol. Second and third adhesive layers are adhered to the surfaces of the first layer, and have compositions comprising olefinic polymers, or copolymers, or blends thereof, the compositions having carboxyl modifications therein. Fourth and fifth layers are adhered to the second and third layers on the respective surfaces opposite the first layer. The fourth and fifth layers comprise 40% to 100% ethylene vinyl acetate and 0% to 60% linear low density polyethylene. Also disclosed are processes for making the oriented five layer films.

REFERENCES:
patent: 2773285 (1956-12-01), Piazze et al.
patent: 3515626 (1970-06-01), Duffield
patent: 4464438 (1984-08-01), Lu
patent: 4469742 (1984-09-01), Oberle et al.
patent: 4472228 (1984-09-01), Yoshimura et al.

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