초록 ▼

A packaging material for photosensitive materials for photographic purposes which is a laminated film having light-shielding property and comprising, (a) a perforated film layer of a thermoplastic resin having a thickness of 7 to 150 m

A packaging material for photosensitive materials for photographic purposes which is a laminated film having light-shielding property and comprising, (a) a perforated film layer of a thermoplastic resin having a thickness of 7 to 150 m

대표청구항 ▼

A laminated film having light shielding properties for packaging photosensitive material comprising: (a) a perforated thermoplastic film layer, comprising a thermoplastic resin, having a thickness of from 7 to 150 mm and a hole area ratio of from 10 to 90%; (b) an adhesive layer which penetrates the

A laminated film having light shielding properties for packaging photosensitive material comprising: (a) a perforated thermoplastic film layer, comprising a thermoplastic resin, having a thickness of from 7 to 150 mm and a hole area ratio of from 10 to 90%; (b) an adhesive layer which penetrates the perforations in the perforated thermoplastic film layer; (c) a first layer comprising a spun bonded nonwoven fabric on one side of the perforated film layer; (d) a second layer on the side of the perforated film layer away from the first layer; the first layer and the second layer bonded together by the adhesive through the perforations in the perforated film layer; said second layer being selected from: (1) a flexible sheet layer comprising a low pressure linear low density polyethylene film layer containing more than 50% by weight of a low-pressure linear low density polyethylene resin in the polyethylene film, and (2) a flexible metal foil layer having laminated to its surface away from said adhesive, a low pressure linear low density polyethylene film layer containing more than 50% by weight of a low-pressure linear low density polyethylene resin in the polyethylene film.