Packaging film for photosensitive materials for photographic pur

Details Packaging film for photosensitive materials for photographic pur Packaging film for photosensitive materials for photographic pur

1985-08-26

1987-05-05

Herbert, Thomas J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428 35, 428213, 428218, 428461, 428523, 430524, 430526, 430961, B32B 702, B32B 1508

Patent

active

046632182

ABSTRACT:
A packaging film for photosensitive materials for photographic purposes which is a laminated film containing at least a metallized film layer and two polyethylene polymer layers which are located on both sides of the metallized film layer, at least one of the above polyethylene polymer layers contains more than 50 wt % of linear low density polyethylene manufactured by a low pressure method, and side or both of the above polyethylene polymer layers contains 0.3 to 30 wt % of a light-shielding material, and the strength of one or both sides of the above polyethylene polymer layers is stronger than the adhesive force between the above metallized film and the difference in the thickness of the polyethylene polymer layers is smaller than 50%.
This film is superior in physical strength, moisture proofing, gas barrier, light-shielding and antistatic character, and it is superior as a packaging film for a photosensitive material for photographic purpose.

REFERENCES:
patent: 2681294 (1954-06-01), Beguin
patent: 2715075 (1955-08-01), Wolinski
patent: 2761791 (1956-09-01), Russell
patent: 2941898 (1960-06-01), Wynn
patent: 3549406 (1970-12-01), Ambush
patent: 4258848 (1981-03-01), Akao et al.
patent: 4438238 (1984-03-01), Fukushima et al.
patent: 4472555 (1984-09-01), Schmukler et al.
patent: 4477532 (1984-10-01), Schmukler et al.
patent: 4551367 (1985-11-01), Nagatani et al.

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