Method of fabricating plastic containers having reduced gas perm

Details Method of fabricating plastic containers having reduced gas perm Method of fabricating plastic containers having reduced gas perm

1976-11-24

1978-10-17

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Stretching or stretch forming

264241, 264320, 264322, 264331, B29C 1703

Patent

active

041209320

ABSTRACT:
Plastic containers having improved physical properties are prepared from a composite billet having an outer peripheral area composed of a thermoplastic resin and an inner central core portion composed of the thermoplastic resin modified with a material which imparts improved physical properties such as reduced gas permeability or increased stiffness or rigidity to the resin. The composite billet is molded into a container wherein the billet core is formed into the sidewalls and bottom of the container and the peripheral portion is formed into a flexible thermoplastic flange surrounding the open end of the container which can be doubled seamed to a metal end closure without fracture.

REFERENCES:
patent: 3097058 (1963-07-01), Branscum
patent: 3662057 (1972-05-01), Webster
patent: 3739052 (1973-06-01), Ayres
patent: 3757718 (1973-09-01), Johnson
patent: 3822161 (1974-07-01), Haase

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