JP2001330884A - Package for photographic sensitive material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize excellent waste property and to reduce environmental load. SOLUTION: This package for photographic sensitive material is constituted of biodegrading resin, resin wherein paper and plastic are mixed or resin wherein iron oxide is added, and a binding resin layer is laminated at least at the binding part of parts constituting the package.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package for photographic light-sensitive materials, and more particularly to a package for photographic light-sensitive materials having good environmental friendliness and good disposal of used containers.

[0002]

2. Description of the Related Art Packaging materials are generally discarded in some form after use, and solving the waste disposal problem has become a major issue for the industrial world. is there. Incineration is common in waste disposal, but there is a demand for materials that burn with low calories, do not generate harmful gases, do not burn harmfully, burn completely, and have little residue so as not to damage the furnace during incineration. In recent years, various studies have been made from the aspect of materials as a countermeasure, and environmentally compatible materials such as biodegradable resins, easily burnable resins, and paper plastic materials have been studied. When these materials can be formed, there is a great merit that the production efficiency is high and the materials can be produced by the conventional production method. For this reason, molding methods for these materials and resins suitable for molding have been developed.

For example, (1) Japanese Patent Application Laid-Open No. 7-9479 discloses
A method for injection molding a pellet containing 10 to 49% of a thermoplastic resin and 90 to 51% of a pulp obtained by disintegrating waste paper is proposed. (2) Japanese Patent Application Laid-Open No. 8-332686 discloses a method of crosslinking a polyolefin resin and pulp with a crosslinking agent. A method for producing a water-resistant corrugated cardboard material in which a corrugated board and a paperboard formed by granulating and extruding by impregnation with water and a corrugated board are proposed. (3) JP-A-9-169028 discloses a method in which a thermoplastic resin, paper powder, and a lubricant are kneaded. Propose paper pellets,
(4) JP-A-9-313326 proposes a molded article using a mixture of pulverized waste paper and a biodegradable resin. (5) JP-A-7-290677 discloses a molded article made of a cellulosic fiber and a thermoplastic resin. (6) Japanese Patent Application Laid-Open No. 3-129341 discloses a method of applying a paper plastic material to a roll-shaped photosensitive material.
A photographic light-sensitive material package which has microbial decomposability and does not generate harmful substances in the light-sensitive material has been proposed (7) JP-A-11-174627.
No. 8 proposes a packaging container for photographic light-sensitive materials in which 0.2 to 8.0 parts of silicone oil is added to biodegradable resin 100. (8) Japanese Patent Application Laid-Open No. 8-290526 discloses (9) Japanese Patent Application Laid-Open No. 8-267640 discloses a biodegradable resin in which a gas barrier layer such as an inorganic compound or a metal alkoxide is laminated on a biodegradable resin. (10)
37th All Japan Packaging Technology Research Conference, research case presentation materials,
Pages 195 to 198 propose that polyethylene resin contain a small amount of active iron oxide as a packaging material having a dioxin suppression function.

[0004]

However, molded articles made of environmentally compatible materials such as the above-mentioned paper plastic materials, biodegradable resins, easily burnable resins, etc., are not suitable for joining between molded parts (for example, ultrasonic welding, thermal welding, etc.). (Welding), there is a problem that joining cannot be performed easily. In addition, there is a disadvantage that the production cost of the material is high, and if it is changed from a conventionally used general-purpose resin, a high molded part is obtained.

[0005] In particular, in the case of the paper plastic material (5), when a light-shielding leader is joined to the flange to shield the outer peripheral portion of the roll-shaped photosensitive material from light, there is a problem that the flange and the light-shielding leader are difficult to join. As a countermeasure, joining can be made by reducing the paper component and increasing the polyethylene component, but it is difficult to reduce the environmental load, and there is a demand to increase the paper component as much as possible.

When the easily burnable resin of the above (10) is applied to a photographic photosensitive material package, the surface is discolored due to iron oxide, which is not preferable in appearance, and the iron oxide adversely affects photographic performance. There is a problem that it cannot be used for a material that directly contacts the photosensitive material.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a photographic photosensitive material package which is suitable for disposal and has a low environmental load. An object of the present invention is to provide a material which can be molded without any problems and has excellent suitability for joining between parts, and further provides a low-cost package for a photographic photosensitive material which does not adversely affect photographic performance. With the goal.

[0008]

In order to achieve the above object, a photographic photosensitive material package according to claim 1 of the present invention comprises:
A biodegradable resin, a photographic photosensitive material package made of a resin mixed with paper and plastic, or a resin to which iron oxide is added, wherein a joining resin layer is laminated on at least a joint portion of components constituting the package. Claim 2.
The invention described in claim 1 is characterized in that in claim 1, the bonding resin layer is formed on the photosensitive material side.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the photographic photosensitive material package of the present invention. FIG. 1 (A) is an exploded perspective view, and FIG. 1 (B) is an enlarged sectional view (schematic view) of a joint.

The photographic photosensitive material package of FIG. 1 is an example applied to a film pack of an instant camera. The instant camera is used by loading a film pack into a film pack loading chamber of the camera body. The film pack contains a stack of self-processing type film units. Then, every time one image is taken, the film unit is taken out from an outlet provided in the camera body.
At this time, the developing roller in the camera body tears off the developer pod of the film unit and spreads the developer on the exposed surface to perform the developing process. As a result, an image appears on the taken-out film unit after a while.

In FIG. 1A, a package 1 for a photographic photosensitive material, which is a film pack, comprises a case body 2 having a rectangular frame shape.
And a rectangular bottom plate 3, and light shielding sheets 4 and 5, a film unit 6, and a light shielding cover 7 are housed inside the case body 2 and the rectangular bottom plate 3. An exposure opening 2a is formed on the front surface of the case body 2, and a film discharge port 2 is formed on the upper surface.
b is formed. An exposure cover 7 is movably mounted on the camera body side to open and close the exposure opening 2a, and light shielding flaps 9 and 10 are mounted on the film discharge port 2b and the upper portion of the exposure cover 7, respectively.

The film unit 6 includes an exposure unit 6a,
A developer pod 6b containing a developer and a trap 6c for absorbing excess developer during development are provided. The developer pod 6b and the trap portion 6c are larger than the exposed portion 6a, and when about ten film units 6 are stacked and stored in the film pack 1, the thickness at both ends becomes larger than the central portion.

The bottom plate 3 is provided with a pair of unit support plates 3a, a pair of pressing openings 3b, and a projection 3c for pressing the film. The unit support plate 3a is formed so as to protrude from both ends of the bottom plate 3 in a direction orthogonal to the film discharge port 2b. When the film unit 6 is housed, the protruding shape causes the curvature of the lowermost film unit 6 due to the difference in thickness between both ends having the developer pod 6b and the trap 6c and the central exposure unit 6a. Correspondingly arc-shaped. In the opening 3b for pressing,
A pressing member (not shown) on the camera side for pressing the film unit 6 toward the exposure opening 2a is inserted.

The external dimensions of the film unit 6 are JI
A representative example is a check film manufactured by Fuji Photo Film Co., Ltd., which is made almost equal to the ID-1 type card described in SX6301 or ISO / IEC 7810.

As the material of the case body 2 and the bottom plate 3, use is made of the above-mentioned paper plastic materials (1) to (10), biodegradable resins, easily burnable resins, and other environmentally compatible materials. In addition, carbon black as a light-shielding agent is added in an amount of 0.05 to 3.
00% by weight. Also, if necessary, a lubricant such as silicone oil, an antistatic agent, an inorganic or organic pigment such as titanium oxide, a processing aid such as zinc stearate, a nucleating agent,
A plasticizer or the like may be contained.

The carbon black is added to secure light-shielding properties. As the classification by the production method of carbon black, furnace method carbon black,
Although there are a channel method carbon black, a thermal method carbon black, etc., the average particle diameter is 10 to 80 μm in terms of little photographic adverse effect (generation of fog, decrease in sensitivity or increase in photosensitivity, etc.) or light shielding property, Furnace method carbon black having a pH of from 5 to 9 is preferred, and especially from 15 to 5
Furnace method carbon black of 0 μm and PH 6 to 8 is preferred.

Commercial products include, for example, carbon black # 20 (B), # 30 (B), # 33 (B), # 40 (B), # 41 (B), and # 44 manufactured by Mitsubishi Kasei.
(B), # 45 (B), # 50, # 55, # 100, # 600, # 950, # 2200 (B), # 2400
(B), MA8, MA11, MA100 and the like. Overseas products include, for example, Cabot Black Pearls 2, 46, 70, 71, 7
4, 80, 81, 607, etc., Regal 300, 330, 400, 660, 991, SRF-S, etc.
Sterling 10, SO, V, S, FT-FF, MT-FF and the like. In addition, Ashland Chemical's Uniteel R, BB, 15, 102,
3001, 3004, 3006, 3007, 3008, 3009, 3011, 3012, XC-3016, XC
-3017, 3020, etc., but not limited thereto.

If the particle diameter of the furnace method carbon black is less than 10 μm, the kneadability with a resin or the like is poor and the light-shielding property is poor.
Physical strength deteriorates. Conversely, if it exceeds 100 μm, the light-shielding ability is inferior at best even if the dispersion is good, and if the carbon concentration is increased to secure the light-shielding property, the physical strength is reduced and the moldability is deteriorated, and it is not practical. In addition, many of the carbon blacks having a pH exceeding the range of 5 to 9 tended to cause photographic adverse effects and could not be used.

In order not to adversely affect the photographic properties of the photographic film, the free sulfur content in the carbon black is 0.6% or less, preferably 0.3% or less, particularly preferably 0.1% or less. It is better to do the following. The content of the cyanide compound is 0.01% or less, preferably 0.005%.
The content is particularly preferably 0.001% or less. Further, the aldehyde compound content is 0.1% or less,
Preferably 0.05% or less, particularly preferably 0.01%
It is as follows. Attention should be paid to the fact that even small amounts of these substances adversely affect photographic properties.

The amount of carbon black added by the furnace method is determined from the viewpoints of ensuring light-shielding properties, injection moldability, and physical strength.
0.05% to 3.00% by weight is preferred. If the addition amount of carbon black is less than 0.05% by weight, the light-shielding property is insufficient, and if it exceeds 3.00% by weight, the physical strength of the package decreases,
Weld marks during injection molding due to increased water absorption,
Silver stripes and the like are generated, causing poor appearance and deterioration of surface strength.

As the light-shielding material, in addition to carbon black, an inorganic pigment such as titanium oxide, red iron oxide and calcium carbonate, or an organic dye may be used in combination.

As a method for imparting lubricity to a material, there are a method of adding a lubricant to a resin for molding the material, and a method of applying a lubricant to a molded article. Examples of the lubricant include silicone oils, higher fatty acid amides such as oleic acid amide and erucic acid amide, metal salts of higher fatty acids such as zinc stearate, higher alcohol esters, fatty acid esters of polyhydric alcohol esters, and the like. It is not limited.

As the silicone oil to be added to the material, dimethylpolysiloxane and carboxyl-modified silicone oil described in JP-A-62-286043 or JP-A-62-284355 are preferable. The addition amount of silicone oil is 0.05% by weight to 5.
0% by weight, preferably between 1.0% and 3.0% by weight.

FIG. 1B shows the case body 2 and the bottom plate 3.
It is an expanded sectional view of the junction part. At the outer peripheral end of the bottom plate 3, a joining recess 3d is formed, and a unit support plate 3a is formed inside the joining recess 3d at intervals. on the other hand,
On the lower surface of the case body 2, a joining protrusion 2d that can be inserted into the joining recess 3d is formed.
An exposure opening 2a is formed on the upper surface of the substrate. The feature of the present invention is that a layer of the resin film 11 is laminated on at least the surface of the joint concave portion 3d of the bottom plate 3 and the joint convex portion 2d of the case body 2, and the joint concave portion 3d and the joint convex portion 2d are abutted. After that, they are joined by ultrasonic welding or thermal welding. Thereby, the resin films 11 are welded to each other, and the case body 2 and the bottom plate 3 are firmly joined. The thickness of the resin film 11 is preferably from 10 to 1000 μm. If the resin film is thinner than 10 μm, the bonding strength is insufficient, and if it is too thick, environmental compatibility is deteriorated.

In this embodiment, the resin film 11 is prepared by a so-called molding transfer method in which the resin film 11 is fed into a mold in advance and then the resin is injected into the mold. A layer of the resin film 11 is formed on a portion, that is, on the entire surface except for one surface of the case body 2 and the bottom plate 3. However, the present invention is not limited to the molding transfer method, and a method using adhesion or printing may be used. (Example 1) Cornpol (modified starch) manufactured by Nippon Constarch was used as the material for the film pack of FIG. 1, and 0.5% of carbon black # 950 from Mitsubishi Chemical was added to the film pack. 0.5% was added. A polyethylene film having a thickness of 20 μm was laminated on the inner surface side of the pack including the pack body and the joining portion by a molding transfer method. Thereafter, a film unit and the like were loaded and joined by ultrasonic welding.

FIG. 2 shows another embodiment of the photographic photosensitive material package of the present invention. FIG. 2 (A) is a sectional view and FIG. 2 (B).
2A is an enlarged sectional view of a portion B in FIG. 2A, and FIG.
It is an expanded sectional view of the C section of (A).

This embodiment is applied to an APS cartridge in which, even when not in use, the leading end of the photo film is wound into the cartridge body, and the photo film is fed by rotating the spool when in use. It is an example.

In FIG. 2A, a photographic photosensitive material package 21 which is an APS cartridge is a container in which an upper shell 22 and a lower shell 23 are joined at portions B and C, and a film is contained therein. A spool 24 for winding the film is rotatably mounted, and a lid member 25 for opening and closing the film outlet is provided.

As shown in FIG. 2B, on one side surface of the upper shell 22 and the lower shell 23, a joint concave portion 22a and a joint convex portion 23a are formed, respectively. As shown in FIG. 2C, the other side surfaces of the upper shell 22 and the lower shell 23 are respectively provided with engaging projections 22b.
And an engagement claw 23b.

As the material of the upper shell 22 and the lower shell 23, an environmentally compatible material such as the above-mentioned paper plastic material, biodegradable resin, or easily burnable resin is used. To this, 0.05 to 3.00% by weight of carbon black is contained as a light-shielding agent. If necessary, a lubricant such as silicone oil, an antistatic agent, an inorganic or organic pigment such as titanium oxide, a processing aid such as zinc stearate, a nucleating agent, a plasticizer and the like may be contained. In addition, on the inner side surfaces of the upper shell 22 and the lower shell 23 including the joining concave portion 22a, the joining convex portion 23a, the engaging projecting portion 22b, and the engaging claw portion 23b,
The layer of the resin film 11 is formed and transferred. Then, while the joining concave portion 22a and the joining convex portion 23a are abutted, the engaging claw portion 23b is engaged with the engaging projecting portion 22b,
Ultrasonic welding heads 26 are pressed against both joints to join them. (Example 2) As a material of the APS cartridge of FIG.
The same one as in Example 1 was employed. 20 μm thick on the inner surface of the cartridge including the cartridge body and the joint
The polyethylene film was transferred by molding and then loaded with a film and joined by ultrasonic welding.

FIG. 3 shows another embodiment of the photographic photosensitive material package of the present invention. FIG. 3 (A) is a perspective view and FIG. 3 (B).
3A is a sectional view of FIG. 3A, FIG. 3C is an enlarged sectional view of FIG. 3B, and FIG. 3D is an enlarged sectional view showing a modification.
This embodiment is an example applied to a roll-shaped photosensitive material.

3 (A) and 3 (B), a package 31 for a photographic photosensitive material comprises a hollow paper cylinder 32 and a paper cylinder 3.
2, a light-shielding leader 34 joined to the end of the roll-shaped photosensitive material 33 and covering the outermost peripheral portion of the roll-shaped photosensitive material 33;
2 and a flange fitting member 35 attached to both ends of the cylindrical member 32. The flange fitting member 35 is formed integrally with a cylindrical fitting portion 35a fitted into the paper cylinder 32 and an outer periphery of the fitting portion 35a. And a circular flange 35b.

The material of the light-shielding leader 34 is a material having a light-shielding property by blending carbon black, and is suitably made of a rubber-based material such as polyethylene, EVA, acrylic, or SBR, or a thermoplastic resin such as polyester.

As the material of the flange fitting member 35, an environmentally compatible material such as the above-mentioned paper plastic material, biodegradable resin, and easily burnable resin is used. To this, 0.05 to 3.00% by weight of carbon black is contained as a light-shielding agent. Also, if necessary, a lubricant such as silicone oil,
It may contain an antistatic agent, an inorganic or organic pigment such as titanium oxide, a processing aid such as zinc stearate, a nucleating agent, a plasticizer, and the like. Also, as shown in FIG.
5b, a resin layer 3 of the same type as the light-shielding reader 34 is provided.
6 are laminated by a two-color molding method. And the paper cylinder 32
The cylindrical fitting portion 35a of the flange fitting member 35 is press-fitted into both ends of the flange 35b, and the inner surface of the flange 35b and the side end of the light-shielding reader 34 are joined by ultrasonic welding or heat welding.

In the two-color molding method, the first resin is injected into a cavity having an initial shape into which a slide core is inserted, and then the second resin is injected into a new cavity formed by moving the slide core. It is a method of injecting.

As shown in FIG. 3D, the resin layer 36 may be formed so as to go over the outer peripheral surface of the flange 35b, and the light-shielding leader 34 may be joined so as to go over the outer peripheral surface of the flange 35b. Good. (Embodiment 3) As a material of the flange fitting member 35 in FIG. 3, paper plastic (paper 70 parts by weight, polyethylene 30
(Parts by weight) to form a polyethylene resin layer on the inner surface of the flange 35b by two-color molding. Carbon black and silicone oil were the same as in Example 1. Thereafter, the roll-shaped photosensitive material 33 is wound up and made of polyethylene having a thickness of 1 mm.
The 20 μm light-shielding leader 34 and the inner surface of the flange 35b were thermally welded.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made. For example, in the above embodiment, the resin layer is provided by the molding transfer method and the two-color molding method. However, the resin layer may be formed by a die press molding machine manufactured by Ube Industries, Ltd., or a two-layer sheet may be formed. The material may be made and formed by a vacuum forming method.

In the above embodiment, polyethylene is used as the bonding resin layer, but the present invention is not limited to this. Preferred materials for the joining resin layer are polyolefin-based materials. Polyolefin-based materials, when buried in soil, take a long time but tend to decompose small, and if a small amount of an environmentally compatible material (for example, biodegradable resin) is added to the bonding resin layer, ,
Can be disassembled quickly. In addition, general resins such as polystyrene resin and polycarbonate resin can be used, but it is preferable to use them in consideration of adhesiveness and gas barrier properties for protecting photographic properties. Although these resins are difficult to decompose even when buried in the soil, they use environmentally compatible materials (except for (10)), so they have a much lower environmental impact than 100% general resin products. Can be said to be a material with little

In order to ensure the adhesion between the environmentally compatible material and the bonding resin layer, a small amount of the bonding resin may be added to the environmentally compatible material. It may be provided thin between the joining resin layers.

The biodegradable resins that can be used in Example 1 include Biogreen from Mitsubishi Chemical Corporation, Biopol from Monsanto Japan, Ecopla from Cargill Japan, Cell Green from Daicel Chemical, and Bionore from Showa Polymer. ,
Lacti of Shimadzu Corporation, Runale of Nippon Shokubai, Lashia of Mitsui Chemicals, Hover of Kuraray, Biofan of Gunze, Placon of Japan Food Processing, Delon of Aicello Chemicals, Nobon of Chisso, Nippon Gohsei Matterby, and Wonder Starch from Clean Earth Inc.

Examples of the paper plastic material include E pellets of Hokuetsu Paper Mills and Petalette of the National Institute of Advanced Industrial Science and Technology. As the easily burnable resin, a material obtained by adding 1% of active ferroside of Okura Kogyo to PE. Is mentioned.

[0042]

As is apparent from the above description, according to the present invention, it is possible to reduce the environmental load with good suitability for disposal, and to mold without changing the conventional product form. In addition, it is possible to provide a material having excellent suitability for bonding between components, and to provide a low-cost package for a photographic photosensitive material which does not adversely affect photographic performance.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a photographic photosensitive material package of the present invention, in which FIG. 1 (A) is an exploded perspective view and FIG. 1 (B) is an enlarged sectional view of a joint.

2A and 2B show another embodiment of the photographic photosensitive material package of the present invention, wherein FIG. 2A is a cross-sectional view, and FIG. 2B is FIG. 2A.
2 (C) is an enlarged sectional view of a portion C of FIG. 2 (A).

3A and 3B show another embodiment of the photographic photosensitive material package of the present invention, wherein FIG. 3A is a perspective view and FIG. 3B is FIG. 3A.
3 (C) is an enlarged sectional view of FIG. 3 (B), and FIG.
(D) is an enlarged sectional view showing a modification.

[Explanation of symbols]

 1, 21, 31: Package for photosensitive material 2d, 3d, 22a, 22b, 23a, 23b: Joint 11, 36: Resin layer for joining

Claims (2)

[Claims] 1. A photographic photosensitive material package comprising a biodegradable resin, a resin obtained by mixing paper and plastic, or a resin to which iron oxide is added, wherein a joining resin is provided at least at a joint portion of parts constituting the package. A package for a photographic light-sensitive material, wherein layers are laminated. 2. The package according to claim 1, wherein said bonding resin layer is formed on the photosensitive material side.