Laminated material for packaging photographic materials

Details Laminated material for packaging photographic materials Laminated material for packaging photographic materials

1990-05-30

1991-12-17

Buffalow, Edith L.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428195, 428212, 428412, 428462, 428463, 4284769, 428483, 428516, 428517, 428522, B29D 2200

Patent

active

050734210

ABSTRACT:
Laminated material sheets for packaging photographic materials, which comprise (a) a middle layer of a thermoplastic resin layer which contains any harmful substances adversely affecting photographic materials, (b) an outer layer having a higher gas-permeability and is photographically inactive comprising a thermoplastic resin and/or a porous flexible sheet layer and (c) an inner layer which is less gas-permeable than said outer layer (b) and is photographically inactive comprising a thermoplastic resin layer, a flexible sheet layer or a laminated layer thereof. Formed articles like containers for like use comprised of said laminated materials. Any harmful substances contained in the thermoplastic resin of the middle layer (a) may diffuse out through the outer layer (b), or they do not almost migrate into the packaged photographic materials through the inner layer (c).

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