JPH0256546A - Packaging material for photosensitive material - Google Patents

Abstract

PURPOSE:To improve dispersibility and to decrease the generation of nonuniform lumps by using titanium nitride as a light shieldable material. CONSTITUTION:The titanium nitride is used as the light shieldable material. The titanium nitride has preferably <=200ppm lead content in order not to exert adverse influence on the photographic performance which is the most important characteristic among the characteristics of the photographic sensitive material. For example, the orthotitanic acid powder obtd. by boiling titanium dioxide and/or titanium hydroxide in an aq. alkaline soln., then sufficiently rinsing the soln. to remove salts and drying the soln. is heated to 500 to 1,000 deg.C in a gaseous ammonia atmosphere to obtain the titanium oxynitride powder decreased in the lead content to <=200ppm. The good resin dispersibility is obtd. in this way and the generation of the nonuniform lumps is decreased; in addition, the generation of malodors is obviated.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to packaging materials for photosensitive materials.

[Conventional technology]

Generally, for materials such as photosensitive materials that lose their quality value when exposed to light, packaging materials that completely block light are used.

Examples of such packaging materials include polypropylene resin and linear low-density polyethylene (hereinafter referred to as LLDPE), which are used for light-shielding containers for loading photosensitive strips such as rolled photographic paper and film in bright rooms. ) Resin, lubricant,
There is a resin composition containing an antioxidant and a light-shielding substance (Japanese Patent Application No. 30904/1982).

In addition, there are resin compositions containing ethylene copolymer resin, aluminum filler, coupling agents, and carbon black that are intended for light-shielding films, light-shielding bags, light-shielding spools, light-shielding magazines, light-shielding cartridges, light-shielding cases, etc. (Gan Sho 63-69674).

In addition, for packaging bags, etc., we also offer aluminum vacuum evaporation.
A light-shielding polyolefin resin system containing 5% or more of ethylene copolymer resin and a light-shielding substance - an axially oriented thermoplastic resin film is applied to an axially oriented thermoplastic resin film through an aluminum vacuum-deposited layer so that the molecularly oriented axes intersect. There is a laminated packaging material for photographic materials (Japanese Unexamined Patent Publication No. 63-30842).

In addition, light-shielding packaging materials for photographic light-sensitive materials, such as light-shielding magazines, cartridges, discs, light-shielding containers for loading in bright rooms, containers for film cartridges, containers for camera bodies, light-shielding moisture-proof bags, etc., books for VTRs, etc. Case,
Magnetic tape cartridges (for video and audio)
As a light-shielding material for colored packaging materials for magnetic materials such as floppy disc jackets, floppy disc cartridges, 8 mm video magazines, etc., ethyl acrylate can be added to a melt index (
Ethylene containing 3 g/10 minutes or more
There is a resin composition for a colored masterbatch containing a resin mainly composed of ethyl acrylate copolymer resin, a light-shielding substance, additives, etc. (Japanese Patent Application No. 15983/1983).

Light-blocking substances are added to these packaging materials to ensure light-blocking properties, but conventionally such light-blocking substances have been limited to carbon black, aluminum powder, Aluminum paste etc. were used.

[Problem to be solved by the invention]

However, the above carbon black has a high content of impurities, especially a high sulfur content that has a negative effect on photographic materials.Also, carbon black easily absorbs water, has poor dispersibility, and is non-uniform. There were many occurrences of lumps.

Aluminum powder has poor dispersibility and forms uneven lumps.
were found to occur frequently, and the physical properties of the resin were deteriorated.

Aluminum paste has a foul odor, and residual mineral spirits deteriorate the physical properties of the resin and have an adverse effect on the silver halide photographic emulsion.

The present invention solves the above problems and uses a light-shielding material that has low sulfur content and water content, good resin dispersibility, little generation of uneven lumps, and no bad odor. The purpose is to provide packaging materials for substances.

[Means to solve the problem]

The present invention has been made to achieve the above object, and is characterized in that titanium nitride is used as a light-shielding substance in a packaging material for photosensitive materials.

The above-mentioned titanium nitride has a lead content of 200% in order not to have an adverse effect on photographic properties, which is the most important characteristic of photographic light-sensitive materials.
It is preferable that it is PPM or less. For example, titanium dioxide and/or titanium hydroxide are boiled in an alkaline aqueous solution, thoroughly washed with water to remove salts, and then dried to obtain an orthotitanic acid powder with a concentration of 500 to 500% in an ammonia gas atmosphere.
Heated at a temperature of 1000'C to reduce the lead content to 200PP
This is titanium oxynitride powder with a particle size of M or less.

The thermoplastic resin used together with titanium nitride in the packaging material for photosensitive materials of the present invention is the same as that used in conventional packaging materials. For example, various polyethylene resins, cellulose acetate, ethylene vinyl acetate copolymer resins, ionomer resins, various polypropylene resins, polystyrene resins,
Both polyvinyl chloride resin and ethylene vinyl alcoholff
i Combined resins, various polyester resins, polyvinylidene chloride resins, polyvinyl alcohol resins, acrylic resins, various polyamide resins, polycarbonate resins, etc.

Among these, polyolefin resins such as various polypropylene resins, various polyamide resins, LDPE resins, L-LDPE resins, and various ethylene copolymer resins are often used.

A lubricant can be used in the packaging material for photosensitive materials of the present invention in order to improve the fluidity of the resin component and improve product insertability, handling properties, and molding processability.

As lubricants, higher fatty acids include palmitic acid, myristic acid, stearic acid, erucic acid, etc., and fatty acid compounds include metals such as lead salts, cadmium salts, barium salts, calcium salts, zinc salts, etc. of the above-mentioned higher fatty acids; These include fatty acid amides of fatty acids and fatty acid esters such as butyl stearate and cetyl palmitate. In addition, as surfactants, stearic acid monoglyceride, polyoxyethylene alkyl ether, polyoxyethylene alkylaryl ether, polyoxyethylene alkyl ester, polyoxyethylene alkylamine, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, polyoxy Examples include ethylene glycerin fatty acid ester and polyoxyethylene propylene glycol monofatty acid ester.

These may be used alone or in combination.

The type of lubricant used and the amount added vary greatly depending on the type of resin used, the type of molded product, and the intended use, but combinations of fatty acid amides and fatty acid metal salts are particularly preferred.

The preferred amount of fatty acid metal salt added is 0.01 to 5.0% by weight. The preferred amount of fatty acid amide with high slipperiness is 0.01 to 1.0% by weight.

In the packaging material for photosensitive materials of the present invention, other known light-shielding substances can be used in addition to titanium nitride.

Examples of light-shielding substances that can be used in the present invention include various carbon blacks, graphite, various metal powders, metal fibers, metal flakes, aluminum paste, pearl pigments, carbon fibers, iron oxide, zinc white, titanium oxide, calcium carbonate,
Examples include organic and inorganic pigments such as mica, barium sulfate, talc, cadmium pigments, Bengara, cobalt pull, copper phthalocyanine pigments, monoazo or polyazo pigments, aniline black, and colored dyes.

Examples of the packaging material for photosensitive materials of the present invention include those described below.

1. Light-shielding container magazines, instant film packs, disk film shells, cassettes, cartridges, etc. 2. Film-wrapped core spools, reels, cores, paper cores, core reinforcing caps, etc. 3. Light-shielding paper leader paper, pigment coating Paper, neutral paper, dust-free paper, synthetic paper, non-woven fabric, etc. 4, Paper carton boxes (spigot type, valve lid fitting type), cardboard boxes, etc. 5, Light-shielding bags, flat bags, self-supporting bags, gusset bags, etc. 6, Cushioning materials 7. Bonding agent, adhesive, hot melt, adhesive tape, etc. 8. Moisture-proof material, waterproof material 9. Masking material ink, label, etc. 10. Single-layer film inflation Film, T-die film, cast film, extrusion coated film, stretch film, -axis M-stretched film, biaxially stretched film, etc.11, Laminated film coextrusion film, blocking laminated film, cross-laminated film, etc.12, Corrugated board 13. Light-shielding ribbons, curtains, light-shielding films, light-shielding pads, etc. 14. Plastic case film patrol unnecessary containers and their camping, hinged cases for microfilms, plastic cases for movies, etc. Since titanium is used, it has a high hiding power, contains few impurities, has a low content of sulfur and lead, and has a low water content, so it does not adversely affect the photosensitive material. Further, the dispersion is good, and there is no deterioration in the resin physical properties of the packaging material.

[Example] Invention product I Bending stiffness (ASTM D-747) 1700 kg/c
m”, M I (ASTMD-1238) 20[!/
10 minutes, density (ASTM D-1505) 0.92
A resin composition in which 0.15% by weight of titanium oxynitride was added to low density polyethylene (hereinafter referred to as LDPE) resin with a concentration of 5 g/Cl1I was made using a Neskool injection molding machine manufactured by Sumitomo Heavy Industries with a mold clamping pressure of 150 L and a 24-cavity mold. A container cap for a photographic film cartridge was manufactured.

Conventional product ■ Bending stiffness (as shown above) 3100 kg/cm2, Ml (as shown above)
4 g/10 min, density (previously) 0.927 g/cf
fl LDPE resin, average particle size 13mp, pt
A container cap for a photographic film cartridge was manufactured from a resin composition to which 0.15% by weight of channel black of l 3 , 0 was added using the same injection molding machine as the product I of the present invention.

The experimental results are shown in Table 1, column A.

Inventive product ■ Ml (mentioned above) 2.1 g/10 min, density (stated above) 0.9
20g/cffl ethylene and 4-methylpentene-1
Using a resin composition in which 3% by weight of titanium oxynitride was added to L-LDPE resin, which is a copolymer resin, blown film molding was performed to produce a 35-thick blown film.

Conventional product ■ Instead of titanium oxynitride, average particle size 21m2+, p
This was the same as the product (2) of the present invention except that 3% by weight of H8.0 furnace carbon black was used.

Conventional product ■ Instead of titanium oxynitride, average particle size 13 mμ, pt+
It is the same as the invention product (2) except that 3% by weight of 3.0 channel black was used.

Conventional product ■ This is the same as the present invention product ■, except that 3% by weight of aluminum paste was used instead of titanium oxynitride.

The experimental results are shown in column 1iB.

Invention product■ Polybutadiene rubber 1.8% by weight, polystyrene resin 9
A spool for photographic film was manufactured by injection molding using a polystyrene resin composition containing 7.2% by weight of titanium oxynitride and 0.3% by weight of titanium oxynitride.

Conventional product ■ Instead of titanium oxynitride, average particle size 21 mμ, pH 8
, 0 furnace carbon black was used in an amount of 0.3% by weight.

Conventional product ■ Instead of titanium oxynitride, average particle size 13mp, pH
It is the same as the product (2) of the present invention except that 0.3% by weight of 3.0 channel black was used.

The experimental results are shown in column C of Table 1.

The evaluation is based on the following.

◎...Excellent ○...Excellent...Acceptable (within practical limits) Mu...Problems (improvement required) ×...Not practical [Effects of the invention] The present invention With the above structure, it is highly safe in terms of ensuring the quality of the photosensitive material, which has a low content of impurities (and has good photographic properties (no fog)).In addition, it has good dispersibility and is bright It generates less odor, has less odor, and can be stored for a long time.

Claims (1)

[Claims] Packaging material for photosensitive materials characterized by using titanium nitride as a light-shielding substance