JPS63193144A - Packaging bag for photosensitive material - Google Patents

Abstract

PURPOSE:To decrease the resistance of drawing out a packaging bag from a magazine and to permit easier and more inexpensive bag making operation by using the packaging bag made into three-layered constitution in which the slide angles of the innermost layer and the outermost layer are specified. CONSTITUTION:This packaging bag is formed by adhering a thermoplastic heat sealing layer 1 which is the innermost layer contg. a lubricant such as oleic acid amide, antioxidant such as phenol and antistatic agent or light shieldable material and a flexible sheet 4 which is the outermost layer by an adhesive layer 5. The angle of slide of the layers 1, 4 are respectively specified to <=20. Various ethylene copolymers, for example, copolymer of ethylene and 4-methyl pentene-1 or octene-1 are usable for the layer 1. A layer contg. foil, powder, etc., of Al, etc., is usable for the layer 2. Formation of the layer 4 and the layer 1 by using nearly the same compsn. is also possible.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to unexposed photosensitive sheets such as X-ray photography film, image recording film, photographic paper, lithographic film, and photosensitive resin film in a bright room. The present invention relates to a packaging bag for a photosensitive material used when loading the photosensitive material into a device such as a photographing device or an image recording device.

[Conventional technology]

Conventionally, photosensitive sheet films such as X-ray film and lithographic film are processed after the packaging bag containing the photosensitive sheet film is opened in a dark room and transferred to a special magazine, etc., which is equipment for photographing or recording. The photographing device or the like was loaded by loading a dedicated magazine into the photographing device or recording device in a bright room. However, transferring the photosensitive sheet film in a darkroom poses the risk of loading the special magazine incorrectly or damaging the surface of the photosensitive sheet film, and furthermore, darkroom equipment must be provided. There was a drawback.

In order to solve these drawbacks, various methods and devices have been developed to load the photosensitive sheet film into a magazine in a bright room by pulling out the packaging bag from the photosensitive sheet film or pulling out the photosensitive sheet film from the packaging bag. It has been proposed (Jitsun Publication No. 1983-43328,
Publication No. 7-25220, Publication of Japanese Utility Model Application No. 56-40534, Publication of Japanese Utility Model Application No. 57-63349, Publication of Japanese Utility Model Application No. 57-121
Publication No. 941, Publication of Utility Model Application No. 57-121942, Publication of Japanese Utility Model Application No. 57-130344, Publication of Japanese Utility Model Application No. 57-13034
Publication No. 5).

For example, as shown in the sixth page and FIG.
After inserting into 1, both end edges 12° 12 are sealed. As shown in FIG. 8, a sliding shutter 18 is provided on the top surface, an outlet 19 is formed on the side, and rollers 20, 20 are provided near the outlet 19. The end edge 12 of the is folded and stored in a cut state, and the other end edge 12 is placed between the rollers 20,
It is held between 20 and 20 minutes. After closing the sliding shutter 18 to maintain light-shielding properties, the packaging bag 11 was gradually pulled up using rollers 20 and 20 and removed from the magazine 21, so that only the photosensitive sheet film 15 and paper 16 were stored. state.

[Problem that the invention seeks to solve]

However, the packaging bags used in this method of loading photosensitive sheet films are made of high-pressure low-density polyethylene resin (hereinafter referred to as LDPE) and have relatively high friction, resulting in wear and tear. Also,
There were problems with moisture proofing and antistatic properties, and there was great resistance when pulling the packaging out of the magazine. Therefore,
The packaging bag may have a triangular edge 12 as shown in FIG. 9, or a dispersion seal 22 as shown in FIG.
was formed. However, these packaging bags 11
Although the above-mentioned drawbacks have been solved to some extent in properties other than moisture-proofing and antistatic properties, it is expensive and has poor bag-making workability.
Moreover, automatic packaging was difficult.

The present invention solves the above-mentioned problems, and provides a photosensitive material that has excellent moisture proofing and antistatic properties, high abrasion resistance and tear strength, has low drawing resistance, and can be formed into a shape that is inexpensive and easy to work with. The purpose is to provide packaging bags for

[Means for solving problems]

In order to achieve the above object, the present invention has a predetermined 3N, and the slip angle of the innermost layer in contact with the photosensitive sheet film is below a predetermined value, and the slip angle of the outermost layer in contact with the magazine is below a predetermined value. This is how it was done.

That is, the packaging bag for photosensitive materials of the present invention contains a lubricant, an antioxidant, an antistatic agent, or a light-shielding substance, and has a sliding angle of 2.
It comprises an innermost thermoplastic resin heat-sealing layer having a sliding angle of 0 degrees or less, a metal layer laminated on the outside of the thermoplastic resin heat-sealing layer, and an outermost flexible sheet layer having a sliding angle of 20 degrees or less. The structure is characterized by the fact that - In the packaging bag for photosensitive materials of the present invention, a thermoplastic resin heat-sealing layer is provided as the innermost layer in contact with the photosensitive sheet film. This thermoplastic resin heat seal layer is
a type and amount of lubricant that does not have any negative impact on the photographic material;
It contains an antioxidant and an antistatic agent or a light-shielding substance.

This thermoplastic resin heat-sealing layer is made of various polyolefin resins, especially various ethylene copolymers, preferably linear low-density polyethylene (hereinafter referred to as L-LDPE) resin,
High-density polyethylene (hereinafter referred to as HDPE) resin, UD
Various thermoplastic resins such as Pε resin are used. Particularly preferred is L-LD, which is a copolymer resin of ethylene and 4-methylpentene-1, hexene-1 or octene-1.
It is PE resin.

The product name for this L-LDPE resin is Uniball (
UCC), Dowlex (Dow Chemical), Sflare (DuPont Canada), Marlex (Philips), NeoZex and UltZex (Mitsui Petrochemical), Mekasu Nix (Japan Petrochemical), Stamilex ( DSM), etc. α-olefins include butene-1, hexene-1,4-methylpentene-1
, heptene-1, octene-1, etc. are used, and the amount thereof is about 0.5 to 15 mol% of the polymer. The density is
-a is said to be about the same level as low-medium density polyethylene resin,
Many commercially available products have a content within the range of 0.87 to 0.95 g/cIIl.

Among these L-LDPE resins, those with an ethylene content of 9 are particularly preferable from the viewpoint of physical strength and heat seal strength.
0-99.5 mol%, α-olefin content 0.5-99.5 mol%
10 mol%, melt index (hereinafter referred to as Ml) 0.8-30 g/l 0 min (JISK6760), density MO, 870-0.940 g/cnl (J
l5K6760), and the α-olefin has 6 carbon atoms.
~ 8 obtained by liquid phase process.

The most preferred representative examples are product names such as Mitsui Petrochemical's Urtozesox, which is produced by artificially introducing 4-methylpentene-1 having 6 carbon atoms into polyethylene as an α-olefin side chain, and α-olefin. carbon f as side chain
;! ! There are DSM's Stamilesox and Down Chemical Company's Dowlex, both of which incorporate eight octene-1 molecules. Idemitsu Petrochemical Co., Ltd.'s Moretic, etc. (All of the above four companies are L-LDPIE resins obtained by a liquid phase method process.) Examples of lubricants include the following.

(11 Silicon-based lubricant; high viscosity dimethylpolysiloxane, modified silicone of dimethylpolysiloxane (Shin-Etsu Silicone, Toshi Silicone), etc. that does not adversely affect photographic materials (2) Oleic acid amide-based lubricant; Armoslip CP (
Lion, Akzo) 9 Neutron (Kuchimoto Seika), Neutron E-18 (Nippon Sakka), Amide ○ (Nitto Chemical).

Alflo E-10 (NOF), Diamond 0-200 (Nippon Kasei), Diamond G-
200 (Nippon Kasei) etc. (3) Erucic acid amide lubricant; Alflo P-10 (
(4) Stearic acid amide lubricant; Alflo S-10
(NOF), Neutron 2 (Nippon Rukka), Diamit 200 (Nippon Kasei), etc. (5) Bis-fatty acid amide lubricants; Bisamide (Nippon Kasei), Diami 7 Do 200 Bis (Nippon Kasei), Armowsox EBS ( (6) Alkylamine lubricants; Electro Stripper TS-2, etc.

This lubricant is preferably added in an amount of 0.01 to 1.0% by weight in order to improve film formability, prevent blocking, and prevent stickiness.

As the antioxidant, a commercially available antioxidant is used.

For example, phenolic antioxidants include 2,6-di-L-butyl-p-cresol, called BIT, and tetrakis[methylene-3(3').

Examples of phosphite (phosphorus) antioxidants include trinonylphenyl phosphite, and sulfur-based antioxidants. Examples include dilaurylthiodipropionate and distearylthiodipropionate. Preferred are phenolic and phosphite antioxidants. Phenol-based materials are particularly preferable for photographic materials because they have few negative effects. In addition, the amount of this antioxidant added is 0.
．． The amount is preferably 0.001 to 0.5% by weight. In the case of photographic materials, the amount added is 0.001 to 0 to prevent fogging.
．． It is preferably 3% by weight, and 0.01 to 0.2% by weight considering the effect of combined use with carbon black.

As the antistatic agent, a cationic active agent, an anionic active agent, a nonionic active agent, a bifacial active agent, etc. are used. Particularly preferred is Electro Stripper TS (trade name) manufactured by Kao Soapzaiba, which is an alkylamine type that has the functions of both a lubricant and an antistatic agent. The amount of the antistatic agent added is preferably 0.05 to 0.5% by weight.

Examples of light-shielding substances include carbon blank, aluminum paste, metal powder, carbon fiber, metal fiber, graphite, metal plated filler with a metalized surface, graphite fiber conductive zinc oxide or tin, graphite powder, carbonaceous or graphitic material. Whisker-like short fibers, polyalkylene oxide compounds, fibrous potassium titanate, etc. can be used. Among these light-shielding substances, carbon blank is particularly preferred.

When carbon blank is used in combination with an antioxidant, the antioxidant effect on thermoplastic resins becomes several times greater than when the antioxidant is used alone, which has a negative effect on photographic materials if the amount added exceeds 0.3% by weight. .

Examples of classifications based on raw materials for carbon black include gas black, oil furnace black, anthracene black, acetylene black, oil smoke, powder smoke, animal black, and vegetable blank. Furnace carbon black is preferred for the purpose of improving light-shielding properties, cost, and physical properties, and acetylene carbon black and Ketchen carbon blank are preferred as light-shielding substances that are expensive but have an antistatic effect. It is also preferable to mix the former and the latter according to the required characteristics, if necessary.

On the other hand, among these carbon blacks, pH 5-9,
Those with an average particle diameter of 10 to 50 mμ are preferable, especially p1
Furnace carbon blanks having an average particle size of 15 to 30 mμ are preferred. By using particles with such pH and particle size, there is less increase or decrease in capri and photosensitivity, and the light shielding ability is large, and L-LD
Even when added to PE resin, it is possible to obtain a packaging material that has a number of advantages, such as being less likely to generate pinholes such as lumps of carbon blank.

The amount of this light-shielding substance added is 0.01 to 10.0% by weight.
It is preferable that

Further, the thermoplastic resin heat seal layer and the flexible sheet layer have a sliding angle of 20 degrees or less.

This sliding angle indicates the slipperiness of the surface using the angle at which the object slides down the slope under a constant load as a factor.

If the sliding angle of the thermoplastic resin heat seal layer exceeds 20 degrees, the photosensitive sheet film may break due to friction when it is pulled out from the packaging bag, or spark discharge may occur due to the generation of static electricity, causing the photosensitive sheet film to become photosensitive. Resulting in. Further, the surface may melt due to frictional heat and become even more difficult to slip, or black thermoplastic resin powder may be generated and adhere to the photosensitive material, causing problems.

If the sliding angle of the flexible sheet layer exceeds 20 degrees, the frictional resistance with the magazine increases when the packaging bag is pulled out from the magazine, resulting in problems such as bag breakage and generation of black resin powder.

Furthermore, this thermoplastic resin heat-sealing layer may be a single layer or may be a coextrusion layer of two or more layers.

The metal layer laminated on the outside of the thermoplastic resin heat-sealing layer contains metal foil, a layer processed with a metal vapor deposition film, a layer processed with a metal sputtering layer, a layer processed with a metal plating layer, metal powder, or metal paste. layers etc. are used. Further, as this metal, aluminum, nickel, tin, etc. are used.

The flexible sheet layer laminated as the outermost layer of the packaging bag needs to minimize dust generation due to friction with the magazine. Thermoplastic resin films, such as various polyethylene resins, polyethylene copolymer resins, polystyrene resins, polypropylene resins, polyvinyl chloride resins, polyvinylidene chloride resins, polyamide resins, polycarbonate resins, fluororesins, polyester resins, and other known films; There is a film of modified resin. In addition, metal thin film processing film (
Typical products include aluminum vacuum-deposited film), coated paper, glassine paper, Art Gi, resin-impregnated paper, acetate film, cellophane, polyvinyl alcohol film,
Also used are flexible sheets treated to improve lubricity, non-woven fabrics, and the like.

Furthermore, it is essential that the flexible sheet layer also has a sliding angle of 20 degrees or less. In particular, it is preferable from the economic point of view that the thermoplastic resin heat seal layer and the flexible sheet layer have substantially the same resin composition.

Various additives can be added to each layer in required amounts as necessary.

Typical examples of additives are described below, but the present invention is not limited thereto, and can be selected from a wide variety of known additives.

(Additive types) (Typical examples) (11 Plasticizers: Phthalate esters, glycol esters, fatty acid esters, phosphate esters, etc. (2) Stabilizers: Lead-based, cadmium-based, zinc-based, alkaline earth metal-based, organic Tin-based, etc. (3) Flame retardants; phosphoric esters, halogenated phosphoric esters, halides, inorganic substances, phosphorous-containing polyols, etc. (4) Fillers: alumina, kaolin, clay, calcium carbonate, mica, talc, titanium oxide, silica, etc. (5) Reinforcing agent; glass roving, metal fiber, glass fiber, glass milled fiber, carbon fiber, etc. (6) Coloring agent: Inorganic pigment (!, FezO5, Ti
O2, ZnO.

CdS, etc.), organic RN materials (carbon), dyes, etc. (7) Blowing agents 5 Inorganic blowing agents (ammonia carbonate, sodium bicarbonate) Organic blowing agents (nitroso-based, azo-based), etc. (8) Vulcanizing agents: Vulcanization Accelerators, accelerators, etc. (9) Deterioration inhibitors; ultraviolet absorbers, antioxidants, metal deactivators, peroxide decomposers, etc. 00) Coupling agents; silane-based, titanate-based, chromium-based, aluminum-based etc. 0υ Lubricants: silicone-based, oleic acid amide F-based, erucic acid amide-based, alkylamine-based, wax, etc. 03 Various thermoplastic resins, rubber, etc. The above-mentioned layers may be laminated by any conventional method, such as thermal bonding. method (hot plate bonding method, impulse bonding method.

Ultrasonic bonding method), methods using adhesives (including wet lamination method, dry lamination method, hot melt lamination method, extrusion lamination method, coextrusion lamination method), etc. are used.

Typical adhesives include various polyethylene resins,
Polyolefin thermoplastic resin hot melt adhesives such as polypropylene resin and polybutene resin, olefin copolymer resin such as ethylene-propylene copolymer resin, ethylene-vinyl acetate copolymer resin, ethylene-ethyl acrylate copolymer resin, ethylene - Thermoplastic resin hot melt adhesives such as acrylic acid copolymer resins and ionomer resins, and geothermally meltable rubber adhesives. Further, as a solution adhesive, there is an adhesive for wet lamination, which is an emulsion or a Latinx adhesive. Typical examples of emulsion adhesives include polyvinyl acetate resin, vinyl acetate-ethylene copolymer resin, vinyl acetate resin and acrylic ester copolymer resin, vinyl acetate resin and maleic ester copolymer resin, and allylic acid resin. copolymer resin,
There are emulsions such as ethylene-acrylic acid copolymer resins. Typical examples of Latinx adhesives include natural rubber, styrene butadiene rubber (SBR), acrylonitrile butadiene rubber (NBR), and chloroprene rubber (
There are rubber latexes such as CR). Furthermore, examples of adhesives for dry lamination include polyurethane adhesives. In addition, known adhesives such as hot melt laminating adhesives, pressure sensitive adhesives, heat sensitive adhesives, etc. blended with paraffin wax, microcrystalline wax, ethylene-vinyl acetate copolymer resin, ethylene-ethyl acrylate copolymer resin, etc. It can also be used. More specifically, polyolefin resin adhesives for extrusion lamination include polyolefin resins such as various polyethylene resins, polypropylene resins, and polybutylene resins, ethylene copolymer (EVA, EEA, EMA, EAA, etc.) resins, and other resins. , L-LDPE resin, which is a copolymer of some other monomer (α-olefin) in addition to ethylene; polymer resin).

It is preferable that these adhesives have a melting point 5° or more lower than the flexible sheet layer to be laminated. If there is a temperature difference of this degree, it is possible to completely perform thermal melt bonding without adversely affecting the flexible sheet.

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

The packaging bag for photosensitive materials of the present invention is suitable for sheet-like photosensitive materials whose quality and performance are destroyed, discolored, or hardened by light, such as photosensitive resin films, ultraviolet curing films, thermal paper, and diazo films. It is also used for packaging photosensitive sheet film, photographic paper, etc.

In particular, photographic materials whose quality is destroyed by small amounts of gas, light, or humidity, such as photographic paper, printing plates, photosensitive film coated with photopolymers, X-ray photography films, and photographs for image recording. ? Ideal for packaging photosensitive sheet films such as ilm and lith film (printing film).

Furthermore, the packaging bag for photosensitive materials of the present invention can be in any known form such as a single-layer flat bag, a double-layer flat bag, a single-layer gift bag, a double-layer gift bag, and the like. The bag can be manufactured by conventionally known plastic film bonding methods such as hot plate bonding, impulse bonding, fusing bonding, ultrasonic bonding, and high frequency bonding. In addition, it is also possible to make bags by an adhesive method using an adhesive, an adhesive method using a pressure-sensitive adhesive, or an adhesive method using a pressure-sensitive or heat-sensitive adhesive.

[For production]

In the packaging bag for photosensitive materials of the present invention, the thermoplastic resin heat-sealing layer slides well against the photosensitive sheet film, making it difficult for wear and damage to occur. In addition, physical strength and heat sealability are improved by additives such as lubricants. The metal layer makes it easy to peel off from the photosensitive sheet film, improves moisture resistance and gas barrier properties, and prevents the occurrence of scratches. The flexible sheet layer protects the metal layer, reduces curling, makes it easier to pull out the packaging bag from the magazine, improves physical strength, and makes bag making easier.

〔Example〕

The packaging bag for photosensitive materials according to the present invention will be explained based on Examples.

1 to 4 are partial cross-sectional views showing the layer structure of a laminated film used in a packaging bag for photosensitive materials.

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 an adhesive layer 5.5.

The laminated film shown in FIG. 2 is the same as the laminated film shown in FIG. 1, except that an aluminum vacuum-deposited thermoplastic resin layer obtained by processing an aluminum vacuum-deposited film layer 7 on a thermoplastic resin N6 is used as the metal N2.

The laminated film shown in FIG. 3 is the same as the laminated film shown in FIG. 1, except that metal powder-added light-shielding thermoplastic resin N8 to which aluminum paste is added is used as the metal N2.

The laminated film shown in FIG. 4 includes an HDPE resin layer 9 as a thermoplastic resin heat seal layer 1 and an L-LDPE resin layer 1.
The laminated film was the same as the laminated film shown in FIG. 1, except that a coextruded film of No. 0 was used.

FIG. 5 is a plan view showing a preferred overall shape of the packaging bag for photosensitive materials of the present invention.

The photosensitive material packaging bag 11 shown in this figure has both edges 12.1
2 is formed in an arcuate shape, 14 is a folding line when storing in a magazine, and 13 is a cutting line indicating a cutting point.

Invention products 1 to ■, conventional product 1. Table 1 shows the experimental results comparing the characteristics of If and comparative product ■.

The evaluation is as follows: ◎...Excellent ○...Excellent...
...Within practical limits M...Problems ×...Not practical *A Required force when pulling out the light-shielding bag Figure 8 shows an X-ray sheet film placed on a bag shaped like Figure 5 and sandwiched between paper sheets. Measure the force required to pull out the light-shielding bag in the direction of the arrow.

Water mouth: Damage occurred when pulling out the light-shielding bag. After the measurement in A above, the X-ray sheet film was developed and fixed.
Determined based on the occurrence of failures such as fogging and scratches.

*C. Generation of dust when pulling out the light-shielding bag. Judgment is based on the amount of dust that adheres or accumulates inside the magazine and on the surface of the X-ray sheet film after the measurement in A above.

(Effects of the Invention) Since the present invention is configured as described above, physical properties, slipperiness,
It has excellent light-shielding, moisture-proofing, and gas-barrier properties, and allows the packaging bag for photosensitive materials to be pulled out with extremely small force.
Static electricity is rarely generated.

[Brief explanation of the drawing]

1 to 4 are partial sectional views of a laminated film used in the packaging bag for photosensitive materials of the present invention, FIG. 5 is a plan view showing a preferred shape of the same, and FIG. 6 is a plan view showing the shape of a conventional packaging bag. 7 is a sectional view of the same as above, FIG. 8 is a sectional view of a magazine in which packaging bags are stored, and FIGS. 9 and 10 are plan views showing other shapes of conventional packaging bags. DESCRIPTION OF SYMBOLS 1...Thermoplastic resin heat seal layer, 2...Metal layer, 4...Flexible sheet layer, 5...Adhesive layer, 1
DESCRIPTION OF SYMBOLS 1... Packaging bag for photosensitive material, 15... Photosensitive sheet film, 16... This paper, 21... Magazine. Patent applicant Fuji Photo Film Co., Ltd. Agent Patent attorney 1) Masahiro Naka
fJzm Figure 3 Figure 4yI District 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] An innermost thermoplastic resin heat-sealing layer containing a lubricant, an antioxidant, an antistatic agent, or a light-shielding substance and having a sliding angle of 20 degrees or less, and a metal layer laminated on the outside of the thermoplastic resin heat-sealing layer. and an outermost flexible sheet layer having a sliding angle of 20 degrees or less.