Verpackungsmaterial für lichtempfindliches Material

摘要

A packaging material for photosensitive materials comprising a coextruded multilayer film layer (4a) comprising a light-shielding ethylene copolymer resin film layer (3a) containing a light-shielding material and a high Young's modulus thermoplastic resin film layer (2a) having a Young's modulus of more than 40 kg/mm<2> and a hygroscopicity of less than the light-shielding ethylene copolymer resin film layer, and a flexible sheet layer (1) laminated on the side of the high Young's modulus thermoplastic resin film layer. According to the composition, the packaging material is excellent in no curling, in physical strength particularly tear strength or in tearability by hand. These packaging materials equip various properties necessary for packaging photosensitive materials, and excellent in bag-making ability for automatic bag-making machine.