JP2578332B2 - Sheet-shaped photographic photosensitive material light-shielding bag for loading into a light room - Google Patents

Description

The present invention relates to an unexposed photosensitive sheet such as a film for X-ray photography, a film for image recording, a photographic paper, a lith film, and a photosensitive resin film in a bright room. The present invention relates to a light-shielding bag for a photographic photosensitive material used when the camera is loaded into an apparatus such as a photographing apparatus or an image recording apparatus.

[Conventional technology]

Conventionally, photosensitive sheet films such as X-ray films and squirrel films have been transferred from a light-shielding bag containing the photosensitive sheet film in a dark room to a dedicated light-shielding magazine or the like which is a facility for photographing or recording. Thereafter, the dedicated magazine was loaded into a photographing device or a recording device in a bright room, whereby the photographing device or the like was loaded. But,
Transfer work of the photosensitive sheet film in a dark room may cause a mistake in loading the magazine into a completely light-shielding special magazine, or damage the surface of the photosensitive sheet film. There was a disadvantage that it did not.

In order to solve these drawbacks, there are various methods and apparatuses for loading a photosensitive sheet film into a magazine in a light room by pulling out a light-shielding bag from a photosensitive sheet film or by pulling out a photosensitive sheet film from a light-shielding bag. It has been proposed (Japanese Utility Model Laid-Open No. 54-43328, Japanese Utility Model No. 57-25220, Japanese Utility Model No. 56-40534, Japanese Utility Model No. 57-63349,
JP-A-57-121941, JP-A-57-121942, JP-A-57-130344, JP-A-57-130345).

For example, as shown in FIGS. 6 and 7, a photosensitive sheet film 15 is sandwiched between substantially L-shaped contact papers 16 and inserted into a tubular light-shielding bag 11 that is sufficiently longer than the photosensitive sheet film 15. The rear end edges 12, 12 are sealed and sealed. Then, as shown in FIG. 8, a sliding shutter 18 is provided on the upper surface, and an outlet 19 is formed on one side surface.
One edge 12 is folded and cut and stored in a magazine 21 provided with rollers 20, 20 near 19, and the other edge 12 is clamped between the rollers 20, 20. After closing the sliding shutter 18 to maintain the light shielding property, the light shielding bag 1 is
1 is gradually moved up and removed out of the magazine 21 so that only the photosensitive sheet film 15 and the paper 16 are stored.

[Problems to be solved by the invention]

However, the light-shielding bag used for loading the photosensitive sheet film into the light room is made of high-pressure low-density polyethylene resin (hereinafter referred to as LDPE) and has relatively large friction, so that abrasion and breakage are caused. In addition, there was a problem in the moisture-proof property and the antistatic property, and the resistance when the light-shielding bag was pulled out of the magazine was large. Therefore,
The light-shielding bag had a triangular edge 12 as shown in FIG. 9 or a dispersion seal 22 as shown in FIG. However, these light-shielding bags 11 are expensive, have poor bag-making workability, and are difficult to be automatically packaged, although the above-mentioned disadvantages have been solved to some extent except for the moisture-proof properties and the antistatic properties.

The present invention solves the above-mentioned problems, and provides an excellent moisture-proof / antistatic property, abrasion resistance, high tear strength, low draw-out resistance, a low-cost shape with good workability. An object of the present invention is to provide a light-shielding bag for a sheet-shaped photographic light-sensitive material for loading in a room.

[Means for solving the problem]

In order to achieve the above object, the present invention has a predetermined three layers, and the innermost layer in contact with the photosensitive sheet film has a slip angle of not more than a predetermined value and the outermost layer in contact with the magazine has a slip angle of not more than a predetermined value. It is as it were.

That is, the light-shielding bag for a photographic material of the present invention is 0.01 to
1.0% by weight of lubricant and 0.001-0.5% by weight of antioxidant and 0.0
An innermost thermoplastic resin heat seal layer containing 5 to 0.5% by weight of an antistatic agent or 0.01 to 10.0% by weight of a light-shielding substance and having a slip angle of 20 degrees or less, and an outer side of the thermoplastic resin heat seal layer A metal layer laminated via an adhesive layer, and an outermost flexible sheet layer with low dust generation and a slip angle of 20 degrees or less laminated on the outside of the metal layer via an adhesive layer. It is characterized by doing.

The light-shielding bag for a sheet-like photographic light-sensitive material for loading into a light room according to the present invention is provided with a thermoplastic resin heat seal layer as an innermost layer in contact with the photosensitive sheet film. The thermoplastic resin heat seal layer is composed of 0.01 to 1.0% by weight of a lubricant and 0.001 to 0.5% by weight of an antioxidant and 0.05 to 0.5% by weight of an antistatic agent of a kind and amount which do not adversely affect the photographic light-sensitive material. Or
0.01 to 10.0% by weight of a light-shielding substance.

This thermoplastic resin heat seal layer is made of various polyolefin resins, particularly various echilen copolymers, preferably linear low density polyethylene (hereinafter referred to as L-LDPE) resin, high density polyethylene (hereinafter referred to as HDPE) resin, LDPE Various thermoplastic resins such as resins are used. Particularly preferred is L-LDPE resin which is a copolymer resin of ethylene and 4-methylpentene-1, hexene-1 or octene-1.

If this L-LDPE resin is indicated by a trade name, Unipol (UC
C), Dourex (Dow Chemical), Scrair (DuPont Canada), Marlex (Philips), Neozex and Ultrazex (Mitsui Petrochemical), Nisseki Linirex (Nippon Petrochemical), Stamilex (DSM) ). As the α-olefin, butene-1, hexene-1, 4-methylpentene-
1, heptene-1, octene-1 and the like are used, and the amount thereof is about 0.5 to 15 mol% of the polymer. The density is generally about low to medium density polyethylene resin, but many commercial products have a density in the range of 0.87 to 0.95 g / cm ³ .

Among these L-LDPE resins, particularly preferred in terms of physical strength and heat seal strength are those having an ethylene content of 90 to 90.
99.5 mol%, α-olefin content is 0.5 to 10 mol%,
Melt index (hereinafter referred to as MI) is 0.8 to 30 g / 10 min (measured at JIS K6760, test temperature 190 ° C, test load 2.16 kgf), density is 0.870 to 0.940 g / cm ³ (JIS K 6760), and α-olefin Is obtained by a liquid phase process having 6 to 8 carbon atoms.

The most preferred representative examples are trade names, such as Ultzex of Mitsui Petrochemical Co., Ltd., in which 4-methylpentene-1 having 6 carbon atoms is artificially introduced into polyethylene as an α-olefin side chain, and α. -DSM's Stamirex and Dow Chemical's Domex, and Idemitsu Petrochemical Co., Ltd.'s Moretech, etc., which have been introduced with octene-1 having 8 carbon atoms as an olefin side chain. L-LDPE resin).

 Examples of the lubricant include the following.

(1) Silicone-based lubricant; dimethylpolysiloxane with high viscosity that does not adversely affect photographic light-sensitive materials, and modified silicone of dimethylpolysiloxane (Shin-Etsu Silicone, Toray Silicone), etc. (2) Oleic amide-based lubricant; Armoslip CP
(Lion, Akzo), Neutron (Nippon Seika), Neutron E-18 (Nippon Seika), Amide O (Nitto Kagaku), Alflo E-10 (Nippon Yushi), Diamid O-
200 (Nippon Kasei), Diamid G-200 (Nippon Kasei), etc. (3) Erucamide amide lubricant; Alflow P-10 (Nippon Oil & Fats), etc. (4) Stearamide amide lubricant; Alflow S-10
(Nippon Oil & Fats), Neutron 2 (Nippon Seika), Diamid 200 (Nippon Kasei), etc. (5) Bisfatty acid amide-based lubricants: Bisamide (Nippon Kasei), Diamid 200 Bis (Nippon Kasei), Armowax EBS ( (Lion Akzo), etc. (6) Alkylamine based lubricants; Electrostripper TS-2, etc.

This lubricant is added in an amount of 0.01 to 1.0% by weight for the purpose of film formability, blocking prevention and stickiness prevention.

As the antioxidant, a commercially available antioxidant is used. For example, BHT is generally used as a phenolic antioxidant.
2,6-di-butyl-p-cresol or tetrakis [methylene-3 (3 ', 5'-di-butyl-4'hydroxyphenyl) propionate] methane (trade name Irga
nox 1010), and phosphite (phosphorus) -based antioxidants include trinonylphenyl phosphite, and sulfur-based antioxidants include dilauryl thiodipropionate, distearyl thiodipropionate, and the like. . Preferably, phenolic and phosphite (phosphorus)
It is a system antioxidant. A phenolic photographic material is particularly preferable because it has little adverse effect. The added amount of this antioxidant is 0.001 to 0.5% by weight. The amount of addition is preferably 0.001 to 0.3% by weight to prevent fogging of the photographic light-sensitive material, and 0.01 to 0.2% by weight in consideration of the combined effect with carbon black.

As the antistatic agent, a cationic activator, an anionic activator, a nonionic activator, a surfactant, or the like is used. Particularly preferred is an alkylamine-based Kao Soap Co., Ltd. Electrostripper TS (trade name) having both functions of a lubricant and an antistatic agent. The amount of the antistatic agent is 0.05 to 0.5% by weight.

Examples of the light-shielding substance include carbon black, aluminum paste, metal powder, carbon fiber, metal fiber, graphite, metal-plated filler having a metallized surface, graphite fiber, conductive zinc oxide or tin, graphite powder, carbonaceous or graphitic. Whisker-like short fibers, fibrous potassium titanate and the like can be used. Among these light-shielding substances, carbon black is particularly preferred. When carbon black is used in combination with an antioxidant, the antioxidant effect of the thermoplastic resin is several times greater than that of the antioxidant used alone, which adversely affects the photographic light-sensitive material when the amount exceeds 0.3% by weight.

Examples of classification based on the raw material of carbon black include gas black, oil furnace black, anthracene black, acetylene black, oil smoke, pine smoke, animal black, vegetable black, and the like. Furnace carbon black is preferred for the purpose of improving light-shielding properties, cost and physical properties, and acetylene carbon black and Ketjen carbon black are preferable as light-shielding substances which are expensive but have an antistatic effect. If necessary, it is also preferable to mix the former and the latter according to required characteristics. On the other hand, among these carbon blacks, pH (measured by JIS K 6221)
5-9, average particle size (measured by electron microscopy) 10-50
μm is preferable, and particularly, the pH is 6 to 9, and the average particle size is
Furnace carbon black of 15 to 30 mμ is preferred.
By using such a material having a pH and an average particle size, the photographic light-sensitive material is less likely to cause fog and increase / decrease in light sensitivity, has a large light-shielding ability, and has a large mass of carbon black even when added to an L-LDPE resin. It is possible to obtain an excellent packaging material for photographic light-sensitive materials, which has many advantages such as hardly generating pinholes such as (bubbles) and fish eyes.

The addition amount of this light-shielding substance is 0.01 to 10.0% by weight.

The slip angle of both the thermoplastic resin heat seal layer and the flexible sheet layer is 20 degrees or less. The slip angle is determined by attaching a flexible sheet to be tested on the inclined surface and the bottom of a metal block with a load of 200 g with a length of 75 mm x 35 mm and a load of 200 g. The angle at which the vehicle starts to slide is shown as a factor.

If the sliding angle of the thermoplastic resin heat-seal layer exceeds 20 degrees, the photosensitive sheet film is exposed to light when the photosensitive sheet film is pulled out of the light-shielding bag due to friction or spark discharge due to static electricity. Resulting in. or,
In some cases, the surface is melted by abrasion heat to make it more difficult to slip, or a black thermoplastic resin powder is generated, which adheres to the photographic light-sensitive material and causes inconvenience.

Even when the sliding angle of the flexible sheet layer exceeds 20 degrees, when the light-shielding bag is pulled out of the magazine, abrasion resistance with the magazine increases, causing spark discharge due to generation of static electricity, exposing the photosensitive sheet film, Problems such as breakage of the bag and generation of black resin powder occur.

Furthermore, this thermoplastic resin heat sealing layer
It may be a single layer or two or more coextruded layers.

The metal layer laminated on the outside of the thermoplastic resin heat seal layer via an adhesive layer is a metal foil, a layer processed by a metal deposition film, a layer processed by a metal sputtering layer, a layer processed by a metal plating layer, a metal A layer containing a powder or a metal paste is used. As the metal, aluminum, nickel, tin or the like is used.

The outermost flexible sheet layer laminated via an adhesive layer on the outside of the metal layer needs to reduce the amount of dust generated by friction with the magazine as the outermost layer of the light-shielding bag, and is commercially available as, for example, clean paper. High quality paper, synthetic paper, synthetic pulp paper and thermoplastic resin film, such as various polyester resins, polyethylene copolymer resin, polystyrene resin, polypropylene resin, polyvinyl chloride resin, polyvinylidene chloride resin, polyamide resin, polycarbonate resin, fluorine There are known films such as resins and polyester resins and films of modified resins thereof. In addition, metal thin film processed film (typically aluminum vacuum deposited film), coated paper, glassine paper,
Art paper, resin-impregnated paper, acetate film, cellophane, polyvinyl alcohol film, those obtained by subjecting these film sheets to a lubricity improving treatment, and nonwoven fabrics are used.

Further, it is essential that the slip angle of the flexible sheet layer is not more than 20 degrees. In particular, it is preferable that the thermoplastic resin heat seal layer and the flexible sheet layer have substantially the same resin composition from the viewpoint of economy and the like.

Various additives can be added to the respective layers as required.

Representative examples of the additives are described below, but the present invention is not limited thereto, and can be selected from all known ones.

(Types of additives) (Representative examples) (1) Plasticizer; phthalate ester, glycol ester, fatty acid ester, phosphate ester, etc. (2) Stabilizer: Lead-based, cadmium-based, zinc-based, alkaline earth metal-based, Organotin, etc. (3) Flame retardant; phosphoric acid ester, halogenated phosphoric acid ester, halide, inorganic substance, phosphorus-containing polyol, etc. (4) Filler: alumina, kaolin, clay, calcium carbonate, mica, talc, titanium oxide, silica (5) Reinforcing agent; glass roving, metal fiber, glass fiber, glass milled fiber, carbon fiber, etc. (6) Colorant; inorganic pigment (Al, Fe ₂ O ₅ , TiO ₂ , ZnO, CdS)
Etc.), organic pigments (carbon), dyes, etc. (7) foaming agents; inorganic foaming agents (ammonium carbonate, sodium bicarbonate), organic foaming agents (nitroso, azo), etc. (8) vulcanizing agents; (9) Deterioration inhibitor; UV absorber, antioxidant, metal deactivator, peroxide decomposer, etc. (10) Coupling agent; silane, titanate, chromium, aluminum (11) Lubricant; silicone, oleic amide, erucamide, alkylamine, wax, etc. (12) Various thermoplastic resins, rubbers, etc. The method of laminating the above various via an adhesive layer is as follows. For example, a thermal bonding method (hot plate bonding method, impulse bonding method, ultrasonic bonding method), a method using an adhesive (wet laminating method, dry laminating method, hot melt laminating method, extrusion laminating method, co-extrusion) Including lamination method),
Etc. are used.

Representative examples of adhesives include various polyethylene resins, polypropylene resins, polyolefin-based thermoplastic resins such as polybutene resins, ethylene-propylene copolymer resins, ethylene-vinyl acetate copolymer resins, ethylene-
Thermoplastic adhesives such as ethyl acrylate copolymer resin, ethylene-acrylic acid copolymer resin, and ethylene copolymer resin such as ionomer resin, etc., hot-melt adhesives (extrusion laminate type adhesives), and other hot-melt rubber adhesives There are agents. Examples of the solution adhesive include an adhesive for wet lamination, which is an emulsion or latex adhesive. Representative examples of emulsion adhesives include polyvinyl acetate resin, vinyl acetate-ethylene copolymer resin, vinyl acetate resin and acrylate copolymer resin, vinyl acetate resin and maleate ester copolymer resin, acrylic acid There are emulsions such as copolymer resins and ethylene-acrylic acid copolymer resins. Representative examples of latex type adhesives include natural rubber, styrene butadiene rubber (SBR), and acrylonitrile butadiene rubber (NB
R) and rubber latex such as chloroprene rubber (CR). Further, as the adhesive for dry lamination, there is a polyurethane adhesive or the like. Other known hot melt laminating adhesives, pressure-sensitive adhesives, heat-sensitive adhesives and the like blended with paraffin wax, microcrislin wax, ethylene-vinyl acetate copolymer resin, ethylene-ethyl acrylate copolymer resin, etc. An adhesive can also be used. More specifically, extrusion lamination type polyolefin resin adhesives include polyolefin resins such as various polyethylene resins, polypropylene resins, and polybutylene resins, and ethylene copolymers (EVA, EE).
A, EMA, EAA) resin, other than ethylene, such as L-LDPE resin, copolymerized with some other monomer (α-olefin), Dupont Surlyn, Mitsui Polychemicals Co., Ltd. ), And an acid-modified resin such as Admir of Mitsui Petrochemical Co., Ltd.

These adhesives preferably have a melting point lower than that of the flexible sheet layer to be laminated by 5 ° or more. With such a temperature difference, hot-melt bonding can be performed completely without adversely affecting the flexible sheet.

The thickness of the adhesive layer by the extrusion lamination method using a thermoplastic resin is usually 10 μm to 500 μm, preferably 15 μm to 200 μm.

The light-shielding bag for a sheet-shaped photographic light-sensitive material for loading into a light room according to the present invention is a sheet-shaped photographic light-sensitive material whose quality or performance is destroyed or discolored by light or hardened and deteriorated, for example, a photosensitive resin film, It is used for packaging of ultraviolet curing film, thermal paper, diazo film, photographic photosensitive film, photographic paper and the like.

In particular, photographic photosensitive materials whose quality is destroyed by a slight amount of gas, light, or humidity, such as photographic paper, printing plate materials, photosensitive films coated with photopolymer, X-ray photography films, photographic films for image recording, Most suitable for packaging photosensitive film such as squirrel film (printing film).

Further, the method of manufacturing the light-shielding bag for sheet-shaped photographic light-sensitive material for loading into a light room according to the present invention includes conventionally known methods such as a hot plate bonding method, an impulse bonding method, a fusing bonding method, an ultrasonic bonding method, and a high frequency bonding method. By the method of bonding plastic films. In addition,
It is also possible to make a bag by an adhesive method using an adhesive or an adhesive, or an adhesive method using a pressure-sensitive or heat-sensitive adhesive.

[Action]

In the light-shielding bag for a sheet-shaped photographic light-sensitive material for loading into a light room according to the present invention, the thermoplastic resin heat-sealing layer slides well with the photosensitive sheet film, so that abrasion and breakage hardly occur. In addition, the physical strength and the heat sealing property are improved by additives such as a lubricant. The metal layer makes it easy to pull out the photosensitive sheet film, and also improves the moisture proof property and gas barrier property and prevents the generation of static. The flexible sheet layer protects the metal layer and reduces the curl, making it easier to pull out the shading bag from the magazine,
It improves physical strength and makes bag making easier.

〔Example〕

EXAMPLES A light-shielding bag for a sheet-like photographic light-sensitive material for loading into a bright room according to the present invention will be described based on examples.

1 to 4 are partial cross-sectional views showing the layer structure of a laminated film used for a light-shielding bag for a photographic light-sensitive material.

The laminated film shown in FIG. 1 is obtained by laminating an aluminum foil layer 3 as a metal layer 2 and a flexible sheet layer 4 on a thermoplastic resin heat sealing layer 1 via adhesive layers 5,5.

The laminated film shown in FIG. 2 is the same as the first except that an aluminum vacuum-deposited thermoplastic resin layer obtained by processing an aluminum vacuum-deposited film layer 7 on a thermoplastic resin layer 6 is used as the metal layer 2.
It is the same as the laminated film in the figure.

The laminated film shown in FIG. 3 is the same as the laminated film of FIG. 1 except that a metal powder-added light-shielding thermoplastic resin layer 8 to which an aluminum paste is added is used as the metal layer 2.

The laminated film shown in FIG. 4 is the same as the laminated film shown in FIG. 1 except that a coextruded film of the HDPE resin layer 9 and the L-LDPE resin layer 10 is used as the thermoplastic resin heat seal layer 1.

FIG. 5 is a plan view showing a preferred overall shape of a light-shielding bag for a sheet-like photographic light-sensitive material for loading into a bright room according to the present invention.

The light-shielding bag 11 for photographic photosensitive material shown in FIG.
Numeral 2 is formed in an arc shape, reference numeral 14 is a folding line when stored in a magazine, and reference numeral 13 is a cutting line indicating a cutting position.

Table 1 shows the experimental results comparing the properties of the products I to VIII of the present invention, the conventional products I and II, and the comparative product I.

[Effects of the Invention] Since the present invention is configured as described above, it has excellent physical properties, lubricity, light-shielding properties, moisture-proof properties, and gas barrier properties. And the light-shielding bag is less likely to be damaged, garbage is generated, and static electricity is less generated during the extraction.

[Brief description of the drawings]

1 to 4 are partial cross-sectional views of a laminated film used for a light-shielding bag for a sheet-shaped photographic light-sensitive material for loading in a bright room according to the present invention;
5 is a plan view showing a preferred shape as a light-shielding bag for a photographic photosensitive material, FIG. 6 is a plan view showing a shape of a conventional light-shielding bag, FIG. 7 is a cross-sectional view of the same, and FIG. 9 and 10 are plan views showing other shapes of the conventional light shielding bag. 1... Thermoplastic resin heat seal layer, 2... Metal layer, 4
... flexible sheet layer, 5 ... adhesive layer, 11 ... shading bag for photographic photosensitive material, 15 ... photosensitive sheet film, 16
…… This paper, 21 …… Magazine

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location G03C 3/00 565 G03C 3/00 565F 565K

Claims (1)

(57) [Claims] (1) 0.01 to 1.0% by weight of a lubricant, 0.001 to 0.5% by weight of an antioxidant and 0.05 to 0.5% by weight of an antistatic agent or 0.0
An innermost thermoplastic resin heat-seal layer containing a light-shielding substance of 1 to 10.0% by weight and having a slip angle of 20 degrees or less, and an outermost layer of the thermoplastic resin heat-seal layer with an adhesive layer interposed therebetween. A bright room comprising: a metal layer; and an outermost flexible sheet layer having low dust generation and a sliding angle of 20 degrees or less laminated on the outside of the metal layer via an adhesive layer. Light-shielding bag for sheet-shaped photographic light-sensitive material for loading.