Easily openable packaging material for photographic photosensiti

Details Easily openable packaging material for photographic photosensiti Easily openable packaging material for photographic photosensiti

1986-08-19

1987-11-24

Buffalow, Edith

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

428220, 428347, 428349, 428480, 428516, 4285375, B65D 3508, B32B 2700

Patent

active

047088966

ABSTRACT:
An easily openable packaging material for photographic photosensitive materials which comprises, a light-shielding heat-sealable film layer containing a lubricant, a light-shielding material and more than 50 wt. % of a high-pressure low-density polyethylene resin and being located as the inner layer, an aluminum foil layer which is laminated on the above heat-sealable film layer with a delamination resistance of greater than 400 g/15 mm width and on the heat-sealable film layer side of which an anchor coat layer is formed and, a heat-resistant flexible sheet layer which is laminated on the above aluminum foil layer and of which heat resistance is higher than the above heat-sealable film layer by 5.degree. C. or more.
This packaging material can easily be torn by hand without a notch.

REFERENCES:
patent: 4070398 (1978-01-01), Lu
patent: 4337285 (1982-06-01), Akao et al.
patent: 4387126 (1983-06-01), Rebholz et al.
patent: 4394474 (1983-07-01), McKinney et al.
patent: 4452846 (1984-06-01), Akao
patent: 4533576 (1985-08-01), Tanahashi et al.
patent: 4554210 (1985-11-01), Long et al.
patent: 4579781 (1986-04-01), Akao

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