Readily thermoweldable films of polyolefins coated with lacquers

Details Readily thermoweldable films of polyolefins coated with lacquers Readily thermoweldable films of polyolefins coated with lacquers

1978-10-23

1981-09-08

McCamish, Marion

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

4274123, 428501, 428516, 428518, 428520, 428524, 428910, B32B 2708, B32B 2738

Patent

active

042884772

ABSTRACT:
Films consisting essentially of alpha-olefin polymers, such as normally solid polypropylene consisting essentially of recurring propylene units and having a substantial crystalline polypropylene content, and in particular isotactic polypropylene, are coated with a ketonic resin resulting from the polycondensation of aldehydes with ketones, which coating renders the films readily thermoweldable and/or impervious to gases, vapors and the like. The coated films are useful for the manufacture of containers, covers, small bags, vessels and in general for the manufacture of articles useful in the packaging industry.

REFERENCES:
patent: 3224896 (1965-12-01), Quinn et al.
patent: 3753769 (1973-08-01), Steiner

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