Fuji Photo Film Company, Limited

Hiroyuki Osanai

Mutsuo Akao

Makoto Kawamura

Koji Inoue

Koji Nakai

Shinichi Fujii

Takashi Takeuchi

Shigehisa Shimizu

Masatoshi Kato

Hisashi Takahashi

Satoshi Mino

Keiichi Ishizaki

Koji Kudo

Hideyuki Sugimoto

Tatsuo Sugii

Yukio Ishii

A molded article for photographic photosensitive material formed of a molding resin composition consisting essentially of 100 parts by weight of crystalline resin composition comprising crystalline resin and at least lubricant or antistatic agent, 0.001 to 2 parts by weight of antioxidant and 5 to 90 parts by weight of acrylic acid copolymer resin, and a molded article for photographic photosensitive materials formed of a light-shielding thermoplastic resin composition comprising a light-shielding material of which the surface has been treated with a surface-treating material and antioxidant. The molded article can inhibit bleeding out and thermal decomposition of antistatic agent, lubridant and organic nucleating agent, and can prevent various troubles induced therefrom.

Molded articles for photographic photo-sensitive materials

A packaged roll-shaped silver halide photosensitive material comprising a winding core, a roll-shaped silver halide photosensitive material wound on the winding core and a packaging material covering the periphery and the both two lateral sides of the roll-shaped silver halide photosensitive material, wherein at least one surface of the three surfaces in the periphery and the both two lateral sides of the roll-shaped silver halide photosensitive material is packaged with a packaging material comprising a combination of a paper material with a pored film, and the water vapor permeability of such packaging material is not less than 5.1 g/m.sup.2 .multidot.24 hours. It is possible to prevent deterioration of a roll-shaped silver halide photosensitive material through abnormal sensitization of photographic performance.

Packaged roll-shaped silver halide photosensitive material

A completely light-shielding packaging material for a photosensitive material obtained on laminating two sorts of separately molded light shielding thermoplastic resin films of different properties on the photosensitive material side and on its outer side via an adhesive layer. The outer thermoplastic resin film is a polypropylene-based resin film at least containing a light-shielding material and a homopolypropylene resin or an .alpha.-olefin containing polypropylene-based resin and having a Young's modulus in the longitudinal direction of 150 to 600 kg/mm.sup.2 and a thickness of 15 to 80 .mu.m. The inner thermoplastic resin film is a polyolefin-based resin film at least containing a light-shielding material, an ethylene copolymer resin and a polyolefin resin, and having a Young's modulus in the longitudinal direction of not higher than 120 kg/mm.sup.2 and a thickness of 20 to 150 .mu.m. This material has physical strength, heat-sealing performance, and amenability to bag making. Light-shielding bag for photosensitive material is produced.

Completely light-shielding packaging material for photosensitive

Laminated films laminated by blocking characterized in the cut end is joined by heat fusion, that the inner layer contains a thermoplastic resin having a Shore hardness lower than the resin of the outer layer, the inner layer comprises an acid-modified polyolefin resin, the joined portion by blocking comprises strongly joined portions and weakly joined portions, the end portions are joined more strongly than the central portion, and a process for producing the same. The laminated films are stably laminated by blocking and does not separate through the laminating process and the bag-making process.

Process for producing a laminated film that is formed by blocking

An easily openable package of photographic photosensitive materials which comprises one or a plurality of photographic photosensitive materials and a light-shielding bag having a heat-sealed portion formed on the periphery and packaging the photographic photosensitive materials. The heat-sealed portion comprises a strongly joined portion and a weakly joined portion, the part surrounded by the strongly joined portion being larger than the photographic photosensitive materials being placed therein with a space, and the light-shielding bag being turned over at least at the edge of the photographic photosensitive materials on the opening side. The package is very easily openable and can ensure sealability, heat sealing properties and physical strength sufficiently.

Easily openable package of photographic photosensitive materials and

Laminated films laminated by blocking characterized in that the cut end is joined by heat fusion, the inner layer contains a thermoplastic resin having a Shore hardness lower than the resin of the outer layer, the inner layer comprises an acid-modified polyolefin resin, the joined portion by blocking comprises strongly joined portions and weakly joined portions, the end portions are joined more strongly than the central portion, and a process for producing the same. The laminated films are stably laminated by blocking and do not separate through the laminating process and the bag-making process.

Laminated film and process for producing the same

A package of rolled photosensitive mateiral comprising a core, a photosensitive strip material wound around the core, a light-shielding leader connected to the end of the photosensitive strip material to shield the peripheral surface of the photosensitive strip material from light and side light-shielding covers connected to both sides of the light-shielding leader so that the boundary between the side light-shielding covers and the light-shielding leader corresponds to the boundary between the peripheral surface and the side surface of the photosensitive strip material. The core is formed by laminating at least 2 sheets of a base paper being moistureproof. The side light-shielding covers are composed of a composite film having a polyethylene film having light-shielding ability and a uniaxially oriented film or a biaxially oriented film made of polyester, polyethylene polypropylene or nylon with the length of the side light-shielding covers being not less than twice as long as the outer periphery of a roll of the photosensitive strip material.

Package of rolled photosensitive material

A substrate of a photosensitive web material of which the base end portion is gradually thinned toward the base end a core for a rolled photographic film which comprises a core body and a crosslinked foamed sheet having an expansion ratio of 18 to 45 times and a thickness of 0.2 to 2.0 mm which contains more than 50 wt. % in the sum of one or more members selected from the group consisting of polyethylene resin having a density of less than 0.930 g/cm.sup.3, ethylenevinyl acetate copolymer resin having a comonomer content of less than 25 wt. % and ethylene-ethyl arcylate copolymer resin having a comonomer content of less than 25 wt. % is disposed on the surface of the core body. The substrate and core sharply reduce the occurrence of marking troubles and pressure mark troubles on the photosensitive web material near the core caused by the difference in levels induced by the base end portion of the web.

Substrate of and core for photosensitive material

A packed assembly of roll-form photographic light-sensitive materials comprising a substantially disk-shaped supporting member fixed to a pallet. The supporting member has a concave portion near the center thereof. An assembly of roll-form photographic light-sensitive materials is placed on the supporting member in a piled state, a central post inserted into the assembly through the cores of the photographic light-sensitive materials and is fixed to the concave portion of the supporting member at the lower end and to a flange cap at the upper end, and a light-shielding material is closely place around the assembly in a light-tight state.

Packed assembly of roll-form photographic light-sensitive materials

A single-sheet gusset bag for photographic photosensitive materials formed of a laminated sheet comprising a metal foil layer or metallized flexible sheet layer, a water-absorptive, and heat-resistant flexible sheet layer which resists dust formation laminated on the outside of said metal foil layer or metallized flexible sheet layer, and a light-shielding polyolefin resin film layer containing at least linear low density polyethylene resin, carbon black and an antioxidant and having a thickness of more than 50 .mu.m laminated on the inside of said metal foil layer or metallized flexible sheet layer, and the bottom seal portion is turned or rolled and fixed by an adhesive or adhesive tape.

Gusset bag for photographic photosensitive materials

A single-sheet gusset bag for photographic photosensitive materials comprising a laminated sheet of which the inner surface layer is a light-shielding polyolefin resin film layer and the outer surface layer is a heat-resistant flexible sheet layer, and having a botom seal portion fixed by a hot-melt adhesive having a softening point by ring and ball method of 75 to 115 C of which the coating amount in the center portion is less than the coating amount of the side portion. In the gusset bag of the invention, the bottom seal portion can be effectively sealed without incidence of fogging and uneven gloss caused by the heat of the hot-melt adhesive. Since the gusset bag is formed of a single sheet, packaging is readily achieved. The cost of the packaging material is also inexpensive.

Growing community of inventors

Kanagawa, Japan

Hiroyuki Osanai