Packaging materials for photosensitive materials and process for producing same

A process for producing packaging materials for photosensitive materials consisting of an at least three-layer laminate comprising thermoplastic resin bonded fabric of mesh structure and flexible sheet layers laminated on both sides thereof, comprising:

• (1) providing termoplastic resin bonded fabric of mesh structure having a mean thickness of 0.03 to 0.9 mm and an aperture ratio of 15% to 98%,
• (2) providing within said laminate one or two or more layers comprising any one of a metal foil having a thickness of 5 to 50 microns, a metal-deposited layer having a thickness of 100 to 1200 .ANG. or a layer containing 0.1 to 30% by weight of a light-shielding substance,
• (3) applying an adhesive layer on only one of said flexible sheet layers to be disposed on both sides of said thermoplastic resin bonded fabric of the mesh structure, and
• (4) through said adhesive layer laminating said flexible sheet layer on said bonded fabric in such a condition that the other flexible sheet layer is bonded on the opposite side over at least 10% of the overall area through the apertures or meshes in said fabric.