Stock material or miscellaneous articles – Hollow or container type article – Cellular material derived from plant or animal source
Patent
1977-10-21
1982-01-05
Robinson, Ellis P.
Stock material or miscellaneous articles
Hollow or container type article
Cellular material derived from plant or animal source
264171, 264176R, 428518, 428520, 428522, 525 57, B65D 100 _, B32B 2730
Patent
active
043094651
ABSTRACT:
A process for manufacturing thermoplastic materials having an elevated gas impermeability and/or improved physical properties. This process is characterized in that it comprises mixing at least partially imcompatible polymers, gelling them by the combined action of heat, pressure and kneading. The gelled mixture is then subjected to laminar flow through substantially parallel surfaces in which the ratio of the length of the surfaces to the distance between them is greater than 10.
A thermoplastic material having increased gas impermeability as well as containers made out of said materials.
A packaging method in which the thermoplastic materials of the invention are used to package oxygen sensitive materials.
REFERENCES:
patent: 2985542 (1961-05-01), Pinsky et al.
patent: 3725184 (1973-04-01), Scopp
patent: 3864152 (1975-02-01), Kitamura et al.
patent: 3928261 (1975-12-01), Ashikaga
patent: 3928704 (1975-12-01), Heidingsfeld et al.
patent: 4003963 (1977-01-01), Creasy
patent: 4123403 (1978-10-01), Warner et al.
Ato Chimie
Robinson Ellis P.
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