Stock material or miscellaneous articles – Structurally defined web or sheet – Including components having same physical characteristic in...
Patent
1986-07-16
1988-10-25
Ives, P. C.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including components having same physical characteristic in...
428328, 428340, 428408, 428447, 428461, 428516, 4284769, 4283197, 4283171, 428513, 4284248, 428518, 428910, 428 35, 428349, 428355, 2641761, 206455, 206497, B32B 516, B65D 6540
Patent
active
047803576
ABSTRACT:
A packaging material for photographic photosensitive materials which comprises a coextruded double layer film comprising a low-pressure linear low-density polyethylene resin layer located on heat sealing side and a polypropylene resin layer or a layer of a polyethylene resin of which density is 0.93 to 0.970 g/cm.sup.3 located on the other side, either of the above layers contains 0.5 to 30 g/m.sup.2 of metal powder or carbon black, and the above low-pressure linear low-density polyethylene resin layer contains 0.05 to 1% by weight of a lubricant.
This packaging material is superior in tear strength, impact puncture strength, tensile strength, light-shielding, moisture proofing, slipping character and heat sealing ability. It is also suitable, for example, for packaging a small piece of photographic materials such as X-ray films for dental use.
REFERENCES:
patent: 4452846 (1984-06-01), Akao
patent: 4513050 (1985-04-01), Akao
Fuji Photo Film Co. , Ltd.
Ives P. C.
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