VERPACKUNGSFILM FUER LICHTEMPFINDLICHES MATERIAL.

摘要

A packaging film for photosensitive materials, which is a laminated film comprising at least three layers of an aluminum foil and two L-LDPE polyethylenic polymer layers laminated onto both sides of said aluminum foil, and in which: (a) said L-LDPE polyethylenic polymer layers contain 50% by weight or more of a low-pressure-processed, linear low-density polyethylene resin (L-LDPE), (b) at least one of said L-LDPE polyethylenic polymer layers contain at least 0.5% by weight of a light-shielding substance, (c) said two L-LDPE polyethylenic polymer layers, formed on both sides of said aluminum foil, have a thickness ratio of no higher than 50%, and (d) said laminated film has a moisture permeability of no higher than 10 g/m2 24 hr (40 DEG C. 90% RH). The light shielding substance is preferably carbon black.