Easily openable packaging material for photographic photosensitive materials
AssigneeFuji Photo Film Co., Ltd.
InventorMutsuo Akao
Life of this patent
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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.
Claims9
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 said 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 said aluminum foil layer and of which heat resistance is higher than said heat-sealable film layer by 5.degree. C. or more.
Dependencies are inferred from the claim text.