JP2006053365A - Photosensitive material packaging material, photosensitive material package and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive photo sensitive material packaging material strongly adhering to an aluminum foil, a manufacturing method of a photosensitive material package, and a photosensitive material package. <P>SOLUTION: The photosensitive material packaging material 3a has the innermost layer, the outermost layer, and an aluminum foil layer 3a3 between the innermost and outermost layers. The aluminum foil layer 3a3 has a polished surface 3a31 on one side and a frosted surface 3a32 on the other side, and is pasted making its polished surface 3a31 outside and its frosted surface 3a32 inside. The polished surface 3a31 is pasted to the outermost layer by dry laminate adhesion 3c using an adhesive, and the frosted surface 3a32 is pasted to the innermost layer by extruded lamination adhesion 3d by using melted PE. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a photosensitive material packaging material for packaging a photosensitive material such as a photographic film or an X-ray film, a method for producing a photosensitive material package, and a photosensitive material package.

Conventionally, as a packaging material for a photosensitive material for packaging such a photosensitive material, in Japanese Utility Model Publication No. 61-20590, an HDPF resin film containing carbon black is uniaxially stretched at a stretch ratio of 2.2 to 4.2 times, A cross-laminate film has been proposed in which two or more layers are bonded so that the stretching axes intersect at an angle of 45 to 90 degrees. Japanese Patent Laid-Open No. 2001-125228 proposes a packaging material having a biaxially stretched polyamide resin film layer laminated on an aluminum foil using an adhesive layer.
Japanese Utility Model Publication No. 61-20590 (pages 1 to 5, FIGS. 1 to 7) JP 2001-125228 A (pages 1 to 41, FIGS. 1 to 9)

  As described above, in the prior art, many photosensitive material packaging materials having an aluminum foil as a light shielding, gas barrier, and waterproof layer have been developed. However, the aluminum foil theoretically has a light shielding, gas barrier, and waterproof layer almost completely, but the adhesion to the film is poor, and peeling with the film occurs when bonding with inexpensive melt PE. For this reason, when the photosensitive material is stored in a moisture-proof light-shielding bag using such a packaging material, the moisture-proof light-shielding bag may break during handling.

  The present invention has been made in view of such points, and an object thereof is to provide a photosensitive material packaging material that can be bonded to a low-cost and strong aluminum foil, a method for producing the photosensitive material packaging body, and a photosensitive material packaging body. It is said.

  In order to solve the above-described problems and achieve the object, the present invention is configured as follows.

The invention described in claim 1 includes an innermost layer,
The outermost layer,
An aluminum foil layer interposed between the innermost layer and the outermost layer;
The aluminum foil layer has a polished surface on one side and a matted surface on the other side,
The matte surface is bonded with the outermost layer side, and the matte surface is bonded with the innermost layer side.

  The invention according to claim 2 is characterized in that the innermost layer has light shielding properties, a lubricant, an antioxidant, and an ethylene / α-olefin copolymer resin containing an antistatic agent as a main component. -It is a slippery polyolefin resin film layer.

  The invention according to claim 3 is characterized in that the outermost layer is a nylon film layer.

  The invention described in claim 4 is characterized in that the polished surface is bonded to the outermost layer side by dry lamination bonding with an adhesive.

  The invention according to claim 5 is characterized in that the matte surface is adhered to the innermost layer side by extrusion lamination adhesion with melt PE.

In the invention according to claim 6, a plurality of sheet-like photosensitive materials are laminated on a tray container,
A moisture-proof light-shielding bag formed into a bag shape using the photosensitive material packaging material according to any one of claims 1 to 5, and storing the photosensitive material laminated on the tray container,
Packaging with the moisture-proof light-shielding bag.

The invention according to claim 7 is a photosensitive material package in which a plurality of sheet-shaped photosensitive materials are stacked in a tray container and packaged by a moisture-proof light-shielding bag.
The moisture-proof light-shielding bag is formed into a bag shape using the photosensitive material packaging material according to any one of claims 1 to 5.

  With the above configuration, the present invention has the following effects.

  According to the invention described in claim 1, the photosensitive material packaging material has an aluminum foil layer, and the photosensitive material packaging material having a beautiful appearance can be obtained by bonding the aluminum foil layer with the polished surface being the outermost layer side. In addition, a strong photosensitive material packaging material can be obtained at low cost by adhering the matte side with the innermost layer side.

  According to the invention described in claim 2, the innermost layer is a light shielding material mainly composed of an ethylene / α-olefin copolymer resin containing a light shielding property, a lubricant, an antioxidant, and an antistatic agent. And slippery polyolefin resin film layer with excellent moisture resistance and oxygen barrier properties, and improved pullability.

  According to invention of Claim 3, an outermost layer is a nylon film layer, and has piercing strength.

  According to the fourth aspect of the present invention, the polished surface can be adhered to the outermost layer side by dry lamination adhesion with an adhesive, and a photosensitive material packaging material having a beautiful appearance can be obtained.

  According to the fifth aspect of the present invention, the matte surface is adhered to the innermost layer side by extrusion lamination adhesion with melt PE, whereby a strong photosensitive material packaging material can be obtained at low cost.

  According to the invention described in claim 6, a plurality of sheet-like photosensitive materials are laminated on the tray container, and the photosensitive material packaging material described in any one of claims 1 to 5 is used to form a bag. The moisture-proof light-shielding bag formed in has a beautiful appearance and is low-cost and strong.

  According to a seventh aspect of the present invention, there is provided a photosensitive material packaging body in which a plurality of sheet-shaped photosensitive materials are stacked in a tray container and packaged by a moisture-proof light-shielding bag, and the moisture-proof light-shielding bag is defined in claims 1 to 5. By forming the photosensitive material packaging material described in any one of 5 into a bag shape, the moisture-proof light-shielding bag has a beautiful appearance and is low-cost and strong.

  Hereinafter, embodiments of the photosensitive material packaging material, the method for producing the photosensitive material packaging body, and the photosensitive material packaging body of the present invention will be described, but the present invention is not limited to this embodiment. The embodiment of the present invention shows the most preferable mode of the present invention, and the present invention is not limited to this.

  FIG. 1 is a view showing a production example of a photosensitive material package according to the present invention. In FIG. A tray container to protect. The laminated photosensitive material 1 uses a photothermographic material in this embodiment, but the photosensitive material 1 is not limited to the photothermographic material. The photosensitive material 1 is stored in a moisture-proof light-shielding bag 3 in a state of being stacked on the tray container 2, and the moisture-proof light-shielding bag 3 is sealed and packaged under reduced pressure to obtain a photosensitive material package 4.

  As shown in FIG. 2, the photosensitive material package 4 is put in a developing machine, engages a take-out member 5 with a locking hole 3 a of the moisture-proof light-shielding bag 3, and rotates the winding shaft 6 to attach the moisture-proof light-shielding bag 3. Excluded (FIG. 2 (a)). Then, the photosensitive material 1 stored in the tray container 2 is sucked by the suction cup 7 and lifted (FIG. 2B), and conveyed one by one and developed (FIG. 2C).

  The tray container 2 of this embodiment has a bottom portion 2a on which the laminated photosensitive material 1 is placed, and four side wall portions 2b for holding the laminated photosensitive material 1 rising from the outer edge of the bottom portion 2a. . The paper tray container 2 is manufactured as shown in FIGS. FIG. 3 is a view showing the tray container forming step, FIG. 4 is a perspective view of the tray container, and FIG. 5 is a cross-sectional view of the rising curved portion of the side wall from the bottom.

As shown in FIG. 3, a base paper 20 is made in a papermaking base paper process. The water content of the base paper 20 is 8% to 8.5%. The base paper 20 is punched and cut into a developed shape of the tray container 2 in a punching process. Next, a plurality of base papers 20 punched into the developed shape of the tray container 2 in the humidity adjustment step are stacked to increase the water content to about 10 wt%. Then, the unfolded base paper 20 is subjected to hot press molding in the press molding process, and the tray container 2 is created. The press molding is performed with a press die, the temperature of the press die is 130 to 160 ° C., and the pressure of the press die is 15 to 250 Kgf / cm ² . Here, the moisture content refers to the percentage of the difference between the weight in an arbitrary state of the sample and the absolute dry weight with respect to the absolute dry weight.

  By heating and press-molding the unfolded base paper 20, the moisture content of the tray container 2 becomes 3 wt% or less. By setting the moisture content of the tray container 2 to 3 wt% or less, the moisture in the moisture-proof light-shielding bag 3 is reduced, and the performance deterioration of the photosensitive material 1 can be prevented.

  As shown in FIGS. 4 and 5, the tray container 2 is formed by pressing until the rising curved portion 2c of the side wall 2b from the bottom 2a is compressed to 80% to 90% of the thickness of the punched base paper. The For example, when the thickness of the base paper 20 is 0.6 mm, the rising curved portion 2c is pressed and molded so as to be 0.4 to 0.45 mm, and the side wall portion 2b is maintained in the rising shape by this pressing, And the paper dust of the bottom part 2a and the side wall part 2b enters into a paper grain, and generation | occurrence | production of paper dust can be prevented.

  In this way, the photosensitive material 1 laminated on the tray container 2 is stored in the moisture-proof light-shielding bag 3, and the moisture-proof light-shielding bag 3 is sealed and sealed in a vacuum, and the tray container 2 is made by press molding paper. Therefore, it is possible to prevent the generation of paper dust and facilitate disposal after use.

  Although the tray container 2 is made of paper in the embodiment shown in FIGS. 3 to 5, the tray container 2 is not limited to paper, and may be formed integrally with a resin or a sheet made of a composite material of paper and plastic. If it is made of resin, LLDPE, HIPS, HDPE, PETE and the like are preferably used.

  In addition, as long as it is made of paper, used paperboard is used paper such as coated balls and manila balls, recycled paper coated with double-sided virgin pulp, and corrugated paperboard with corrugated paperboard bonded with flute and liner. ing. Furthermore, for the purpose of improving moldability, synthetic paper (paper impregnated with PE resin at 20% or less) is used.

That is, the material of the composite sheet of paper and plastic can be selected from the following materials.
(A) Natural pulp: wood, chemical pulp (B) synthetic pulp: polyethylene pulp (C) synthetic fiber: acrylonitrile, polyamide, polyacrylonitrile, polypropylene, polyvinyl alcohol, polyester (D) water-based resin for internal addition or impregnation: SBR latex, NBR, chloroprene, natural rubber, isoprene, polyurethane, polyacrylate, polyvinyl acetate, ethylene vinyl acetate copolymer latex, polyvinyl chloride latex, polyvinylidene latex, polyacrylamide latex, acrylic ketene dimer latex, starch, PVA , Solvent resin for dextrin (E) impregnation: EVA, SBR, NBR, MBR, alkyd resin, polyester resin, amino alkyd resin, polyvinyl acetate resin, polyvinyl chloride resin , Polyurethane resin, polyacrylate resin The material of the composite sheet is preferably selected from one or more of the above (A), or (A), (B) and (C). It is to use in combination, or to use a base paper obtained by further adding (D) and impregnating (D) or (E).

  When the above materials are used in combination, the preferred mixing ratio of each material is (A) :( B)-(C) = 100-30%: 0-70%, and the addition of (D) to the pulp is 0. ~ 20% is preferred, and the preferred impregnation ratio of (E) is 3 to 70% by weight of pulp.

  Further, as shown in FIG. 6, the moisture-proof light-shielding bag 3 includes a light-shielding / sliding polyolefin resin film layer 3a1 provided in the innermost layer, a nylon film layer 3a2 provided in the outermost layer, It is formed into a bag shape using a photosensitive material packaging material 3a having an aluminum foil layer 3a3 interposed between the conductive polyolefin resin film layer 3a1 and the nylon film layer 3a2. The light-shielding / sliding polyolefin resin film layer 3a1 is mainly composed of an ethylene / α-olefin copolymer resin containing a light-shielding property, a lubricant, an antioxidant, and an antistatic agent. And oxygen barrier properties, and pullability is improved. The outermost layer is the nylon film layer 3a2, and has a piercing strength.

  The aluminum foil layer 3a3 has a polished surface 3a31 on one side and a matted surface 3a32 on the other side. The polished surface 3a31 of the aluminum foil layer 3a3 is bonded to the nylon film layer side by dry laminate bonding 3c using an adhesive. Further, the matte surface 3a32 of the aluminum foil layer 3a3 is bonded to the light-shielding / sliding polyolefin resin film layer 3a1 side by extrusion laminate bonding 3d by melt PE.

  The matte surface 3a32 of the aluminum foil layer 3a3 has fine irregularities of 0.1 μm to 1.57 μm on the surface. Since the matte surface 3a32 has irregularities as compared with the non-matte surface, the adhesion becomes strong. As described above, the aluminum foil layer 3a3 can be bonded at the low-cost and strong photosensitive material packaging material by bonding the matte surface 3a32 with the light-shielding / sliding polyolefin resin film layer 3a1 side. Moreover, the glossy surface 3a31 of the aluminum foil layer 3a3 can be bonded to the nylon film layer side to obtain a photosensitive material packaging material having a beautiful appearance.

  Adhesion to the aluminum foil layer 3a3 includes extrusion lamination adhesion using melt PE and dry lamination adhesion using an adhesive. However, since a new procedure such as aging is required, dry lamination adhesion is expensive. However, extrusion laminate bonding has a tendency that the adhesive layer becomes considerably thicker than dry laminate bonding and is weaker than the adhesive in terms of strength.

  Therefore, at least one surface of the aluminum foil layer 3a3, that is, the innermost surface side of the moisture-proof light-shielding bag 3, is set to a matte surface 3a32 to perform adhesion 3d with melt PE to reduce the cost. Further, the other surface of the aluminum foil layer 3a3, that is, the outermost surface side of the moisture-proof light-shielding bag 3, is used as a polished surface 3a31, and adhesion 3c by extrusion lamination is performed.

  In this embodiment, the nylon film layer 3a2 is used as the outermost layer, but a strong film, PET, or the like may be used. Adhesion by extrusion lamination is weak against PET, which has different properties from PE.

  Therefore, for example, in the configuration of PET or NY / aluminum foil layer / PE (black), dry laminate bonding is used for bonding to NY or PET, and extrusion laminate bonding is used for bonding PE including a light shielding layer to an aluminum foil layer. It is desirable to use it. At that time, by bringing the matte surface 3a32 of the aluminum foil layer 3a3 on the side where the adhesive laminate is weakly bonded, it is possible to produce a desirable photosensitive material packaging material together with the cost and the adhesive strength between the aluminum foil layer 3a3 and the film. It becomes.

  Hereinafter, the photosensitive material packaging material of this embodiment is mainly composed of an ethylene / α-olefin copolymer resin containing a light-shielding property provided in the innermost layer, a lubricant, an antioxidant, and an antistatic agent. Light shielding / sliding polyolefin resin film layer as component, nylon film layer provided as outermost layer, aluminum foil layer interposed between light shielding / sliding polyolefin resin film layer and nylon film layer The following light-shielding / sliding polyolefin resin film can be used.

  The resin used for this photographic photosensitive material packaging material is manufactured using a metallocene catalyst. Representative resins include polyolefin resins (high density polyethylene (HDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), polypropylene (PP), etc.). Metallocene is a compound having a structure in which a transition metal is sandwiched between unsaturated cyclic compounds, and a combination of a Zr complex and methylaluminoxane (MAO) is known.

  This catalyst is also referred to as a Kaminsky catalyst or a Kaminsky-sinn catalyst. When a film resin material using a metallocene catalyst is used for the heat seal layer in this way, the flexible layer laminated on this layer is a thermoplastic film such as various polyethylene resins, ethylene copolymer resins, polypropylene resins, propylene. · Known films such as α-olefin copolymer resin, polyvinyl chloride resin, polyvinylidene chloride resin, polyamide resin, polycarbonate resin, polystyrene resin, polyester resin, and modified resin films thereof, or uniaxial and biaxial stretching thereof A film etc. are mentioned. Also, metal thin film processed film (typically aluminum vacuum deposited film), cellulose acetate film, cellophane, regenerated cellulose, polyvinyl alcohol, synthetic paper, metal foil (typically aluminum foil), non-woven fabric, paper (unbleached craft) Paper, semi-bleached kraft paper, bleached kraft paper, hilly base paper, kulpack paper, duo stress paper, white paperboard, photographic base paper, pure white roll paper, coated paper, imitation paper, glassine paper) and the like.

  These flexible sheets can be used alone or in combination of two or more. These flexible sheets preferably have a melting point higher by 10 ° C. or more than the heat seal layer.

  As a means for laminating these flexible layers, various methods are applied depending on the application. For example, multilayer extrusion method, extrusion laminating method, dry laminating method, etc. are described in Convertech 1991.1, Laminate Basic Course (8) P10-14, Convertech 1990.5, Laminate Basic Course (3) P40-48. It can be manufactured by the method described in Extrusion molding of plastic and its application, Sebundo Co., Ltd., P137-147, Plastic Handbook, Asakura Shoten P727. In the case of laminating by the dry lamination method, the adhesive to be used can be selected as required from among those described in Convertech 1993, Laminate Basic Course (23) P40-48. Among these, esters and urethanes are examples of adhesives that do not adversely affect photographic performance such as fogging.

  In order to obtain a molded product using a metallocene catalyst and a resin having a low molecular weight polymer content of 3% or less, it may be produced by ordinary multi-piece injection molding, and the injection molding method is particularly limited. Instead, for example, a normal hot runner injection molding method, an in-mold vacuum injection molding method, a stack molding method, or the like may be used. In particular, the hot runner method is preferable in terms of molding efficiency.

  Various additives can be added to this resin as required. The light-shielding carbon black preferably has a sulfur content of 0.5% by weight or less so as not to adversely affect photographic performance, and examples thereof include commercially available products.

  The addition amount is preferably in the range of 0.3 wt% to 0.6 wt%, more preferably 0.35 wt% to 0.40 wt%. When the content is 0.7% by weight or more, the film physical properties become weak and unfavorable. When the content is 0.3% by weight or less, the light shielding property is insufficient, which is not preferable.

  In addition, additives that can be added as necessary are shown below.

Lubricant (1) Silicone-based lubricant; various grades of dimethylpolysiloxane (Shin-Etsu Silicone, Toray Silicone)
(2) Oleic acid amide lubricant; Armoslip CP (Lion Akzo), Neutron (Nippon Seika), Neutron E-18 (Nippon Seika), Amide O (Nitto Chemical), Alfro E-10 (Nippon Yushi) ), Diamond O-200 (Nippon Kasei), Diamond G-200 (Nippon Kasei), etc. (3) Erucic acid amide-based lubricant; Alflow P-10 (Nippon Yushi), etc. (4) Stearic acid amide-based lubricant; Alflow S-10 (Nippon Yushi), Neutron 2 (Nippon Seika), Diamond 200 bis (Nippon Kasei), etc. (5) Bis fatty acid amide lubricants; Bisamide (Nippon Kasei), Diamond 200 bis (Nippon Kasei), Armo wax EBS (Lion Akzo) etc. (6) Alkylamine lubricants; Electro stripper TS-2 (Kao soap) etc. (7) Hydrocarbon lubricants Liquid paraffin, natural paraffin, micro wax, synthetic paraffin, polyethylene wax, polypropylene wax, chlorinated hydrocarbon, fluorocarbon (8) fatty acid lubricant; higher fatty acid (preferably C12 or more), oxy fatty acid (9) ester lubricant; Lower alcohol esters of fatty acids, polyhydric alcohol esters of fatty acids, polyglycol esters of fatty acids, resin alcohol esters of fatty acids (10) alcohol-based lubricants; polyhydric alcohols, polyglycols, polyglycerol (11) metal soaps; lauric acid, stearin Compounds of higher fatty acids such as acids, ricinoleic acid, naphthenic acid, oleic acid, etc. and metals such as Li, Mg, Ca, Sr, Ba, Zn, Cd, Al, Sn, Pb, or conductive substances, electrostatic failure, etc. Add to prevent Door is preferable.

Typical examples of this conductive material are shown below.
1) Nonionic surfactant (typical component polyoxyethylene glycols)
2) Anionic surfactant (typical component polyoxyethylene glycols)
3) Cationic surfactant (typical component quaternary ammonium salt)
4) Amphoteric surfactant 5) Alkylamine derivative 6) Fatty acid derivative 7) Various lubricants 8) Carbon black, graphite 9) Metal surface coating pigment 10) Metal powder, Metal flake 11) Carbon fiber 12) Metal fiber 13) Whisker ( (Potassium titanate, alumina nitride, alumina)
Typical examples of the nonionic surfactant are shown below.

  Polyethylene glycol fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene aliphatic alcohol ether, polyoxyethylene alkylphenyl ether, polyoxyethylene glycerin fatty acid ester, polyoxyethylene aliphatic amine, sorbitan mono fatty acid ester, fatty acid pentaerythritol , Ethylene oxide adduct of fatty alcohol, ethylene oxide adduct of fatty acid, ethylene oxide adduct of fatty acid amino or fatty acid amide, ethylene oxide adduct of alkylphenol, ethylene oxide adduct of alkyl naphthol, partial fatty acid ester of polyhydric alcohol And other nonionic antistatic agents described in JP-B 63-26697, page 120.

  Typical examples of the anionic surfactant are shown below.

  Lisinoleic acid sulfate soda salt, various fatty acid metal salts, silinoleic acid ester sulfate ester soda salt, sulfated oleic acid ethylaniline, olefinic sulfate ester salt, oleyl alcohol sulfate soda salt, alkyl sulfate ester salt, fatty acid ethyl sulfonate Alkyl sulfonate, alkyl naphthalene sulfonate, alkyl benzene sulfonate, succinate sulfonate, phosphate ester, and the like.

  Typical examples of the cationic surfactant are shown below.

  Primary amine salt, tertiary amine salt, quaternary ammonium salt, pyridinium derivative and the like.

  Typical examples of the amphoteric surfactant are shown below.

Carboxylic acid derivatives, imidazoline derivatives, and betaine derivative antioxidants are preferably added in order to prevent the occurrence of fish eyes and butts (lumped non-uniform failure). The typical example of this antioxidant is shown below.
(I) Phenol antioxidant 6-t-butyl-3-methylphenol derivative, 2,6-di-t-butyl-P-cresol, t-butylphenol, 2,2'-methylenebis (4-ethyl-6 -T-butylphenol), 4,4'-butylidenebis (6-t-butyl-m-cresol), 4,4'-thiobis (6-t-butyl-m-cresol), 4,4-dihydroxydiphenylcyclohexane, Alkylated bisphenol, styrenated phenol, 2,6-di-t-butyl-4-methylphenol, n-octadecyl-3- (3 ', 5'-di-t-butyl-4'-hydroxyphenyl) propionate, 2,2'-methylenebis (4-methyl-6-tert-butylphenol), 4,4'-thiobis (3-methyl-6-tert-butylphenol) 4,4′-butylidenebis (3-methyl-6-tert-butylphenol), stearyl-β (3,5-di-4-butyl-4-hydroxyphenyl) propionate, 1,1,3-tris (2- Methyl-4-hydroxy-5-tert-butylphenyl) butane, 1,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene, tetrakis ( Methylene-3- (3 ′, 5′-di-t-butyl-4′-hydroxyphenyl) propionate) methane (ro) ketoneamine condensation antioxidant 6-ethoxy-2,2,4-trimethyl-1,2 -Dihydroquinoline, polymer of 2,2,4-trimethyl-1,2-dihydroquinoline, trimethyldihydroquinoline derivative (c) allylamine antioxidant phenyl-α- N-phenyl-β-naphthylamine, N-phenyl-N′-isopropyl-P-phenylenediamine, N, N′-diphenyl-P-phenylenediamine, N, N′-di-β-naphthyl-P-phenylene Diamine, N- (3'-hydroxybutylidene) -1-naphthylamine (d) imidazole antioxidant 2-mercaptobenzimidazole, zinc salt of 2-mercaptobenzimidazole, 2-mercaptomethylbenzimidazole (e) phosphite Antioxidants alkylated allyl phosphite, diphenylisodecyl phosphite, tris (nonylphenyl) phosphite sodium phosphite, trinonylphenyl phosphite, triphenyl phosphite (f) thiourea antioxidant thiourea derivatives , 1,3-bis ( Methylamino propyl) -2-thiourea (g) Other air prevention useful oxidizing oxidant dilauryl thiodipropionate Representative commercial antioxidants shown below.
(1) Phenolic antioxidants; SUMILIZER BHT (Sumitomo), IRGANOX
1076 (Ciba Geigy), MARK AO-50 (Adeka Argus), SUMILIZER BP-76 (Sumitomo), TOMINOX SS (Yoshitomi), IRGANOX 565 (Ciba Geigy), NONOX WSP (ICI), SANTONOX (Monsanto) ER ), ANTAGECRYSTAL (Kawaguchi), IRGANOX 1035 (Ciba Geigy), ANTAGE W-400 (Kawaguchi), NOCLIZER NS-6 (Emerging Ouchi), IRGANOX 1425 WL (Ciba Geigy), MARK AO-80 (Adeka Argus), SUGILIZ -80 (Sumitomo), TOPANOLCA (ICI), MARK AO-30 (Adeka Argus), MARK AO-20 (Adeka Argus), IRGA OX 3114 (Ciba Geigy), MARK AO-330 (Adeka Argus), IRGANOX 1330 (Ciba Geigy), CYANOX 1790 (ACC), IRGANOX 1010 (Ciba Geigy), MARK AO-60 (Adeka Argus), SUMILIZER BP ), TO-MINOX TT (Yoshitomi)
(2) Phosphorous antioxidants: IRGAFOS 168 (Ciba Geigy), MARK 2112 (Adeka Argus), WESTON 618 (Borg Warner), MARK PEP-8 (Adeka Argus), ULTRANOX 626 (Borg Warner), MARK
PEP-24G (Adeka Argus), MARK PEP-36 (Adeka Argus), HCA (Sanko)
(3) Thioether-based antioxidants; DLTDP “YOSHITOMI” (Yoshitomi), SUMILIZER TPL (Sumitomo), ANTIOX L (Nippon), DMTD “YOSHITOMI” (Yoshitomi), SUMILIZER TPM (Sumitomo), ANTIOX M (Nippon) , DSTP “YOSHITOMI” (Yoshitomi), SUMILIZER TPS (Sumitomo), ANTIOX S (Nippon), SEENOX 412S (Cipro), MARK AO-412 S (Adeka Argus), SUMILIZER TP-D (Sumitomo), MARK AO- 23 (Adeka Argus), SANDSTABP-EPQ (Sand), IRGAFOS P-EPQ FF (Ciba Geigy), IRGANOX 1222 (Ciba Geigy), MARK
329K (Adeka Argus), WES TON 399 (Borg Warner), MARK 260 (Adeka Argus), MARK 522A (Adeka Argus)
(4) Metal deactivators NAUGARD XL-1 (Uni Royal), MARK CDA-1 (Adeka Argus), MARKCDA-6 (Adeka Argus), LRGANOX MD-1024 (Ciba Geigy), CU-NOX (Mitsui East) Pressure) Particularly preferred antioxidants are phenolic antioxidants, and commercially available products include various types of Ciba Geigy's Irganox and Sumitomo Chemical Co., Ltd. Sumilizer BHT, Sumilizer BH-76, Sumilizer WX-R, Sumilizer BP- 101 etc.

  In addition, 2,6-di-tbutyl-p-cresol (BHT), low volatility high molecular weight phenol type antioxidant (trade name: Irganox 1010, Irganox 1076, Topanol CA, Ionox 330, etc.), dilauryl thiodipro It is effective to use one or more, particularly two or more, such as pionate, distearyl thiopropionate, distearyl thiopropionate and dialkyl phosphate.

  Other antioxidants disclosed on pages 794-799 of the Plastic Data Handbook (published by KK Industrial Research Council) and various antioxidants disclosed on pages 327-329 of the Plastic Additive Data Collection (KK Chemical Industry Co., Ltd.) It is possible to select and use various antioxidants disclosed in PLASTICS AGE ENCYCLOPEDIA Progress 1986 (KK Plastic Age), pages 211 to 212.

  The addition amount of these additives is 0.5% to 3.0% by weight in the case of a slip agent, and if it exceeds 3% by weight, the film surface properties such as dispersion, failure, and leaching change. When the amount is 4% by weight or less, the effect is lost.

  In the case of an antistatic agent, the content is 2.0% by weight to 4.0% by weight. When it is 1.9% by weight or less, the antistatic effect is lost.

  In the case of an antioxidant, it is 0.01% by weight to 1.0% by weight, and if it exceeds 1.0% by weight, there may be an abnormality of fog or sensitivity increase / decrease in photographic performance. Below the weight percent, there is almost no effect. The antioxidant is preferably added in the minimum amount that does not generate fish eyes or scum.

  Examples of the dispersant include phosphate esters, alkyl sulfates, higher alcohols, polyethylene oxides, higher fatty acid salts, sulfosuccinic acid, sulfosuccinic acid esters, known surfactants, and salts thereof, and negative organic groups (for example, It is also possible to use polymer dispersant salts having -COOH). These dispersants may be used alone or in combination of two or more.

  The moisture-proof light-shielding bag 3 of this embodiment is formed into a bag shape by heat sealing using a photosensitive material packaging material, and moisture does not penetrate into the tray container 2. In addition, since moisture is not contained in the tray container 2 by the moisture-proof light-shielding bag 3, the performance deterioration of the photosensitive material 1 can be prevented. Further, rubbing between the tray container 2 and the moisture-proof light-shielding bag 3 can be prevented, which can contribute to prevention of paper dust.

  A photothermographic material as a photosensitive material to which the present invention is applied will be described below. In the photothermographic material of the present invention, a photographic composition layer containing an organic silver salt, a photosensitive silver halide, and a silver ion reducing agent is formed on a support by coating with a solvent, on the photographic composition layer. It is preferable to have at least one protective layer. A so-called single-sided photosensitive material having a backing layer on the other side of the support is preferred.

  The photothermographic layer of the photothermographic material comprises a photosensitive layer and a non-photosensitive layer. The photosensitive layer contains an organic silver salt and photosensitive silver halide grains, and the non-photosensitive layer contains a reducing agent. This embodiment is preferable.

(Photosensitive silver halide)
The silver halide grains function as an optical sensor. In the present invention, in order to keep the cloudiness after image formation low and to obtain good image quality, the average particle size is preferably small, preferably 0.20 μm or less, more preferably 0.02 μm or more and 0.15 μm or less, and still more preferably. Is preferably 0.03 μm or more and 0.11 μm or less.

  The average particle diameter here means the length of the edge of the silver halide grain when the silver halide grain is a so-called normal crystal of a cube or octahedron. In the case of non-normal crystals, for example, in the case of spherical, rod-like, or tabular grains, it means the diameter when a sphere equivalent to the volume of silver halide grains is considered.

  The silver halide grains are preferably monodisperse grains. The monodispersed particles herein refer to particles having a monodispersity obtained by the following formula of 40% or less, more preferably 30% or less, and particularly preferably 20% or less.

Monodispersity = (standard deviation of particle size) / (average value of particle size) × 100
The shape of the silver halide grains is not particularly limited, but the ratio occupied by the Miller index [100] plane is preferably high, and this ratio is 50% or more, further 70% or more, particularly 80% or more. Is preferred. The ratio of the Miller index [100] plane is determined by T.T. based on the adsorption dependency of the [111] plane and the [100] plane in the adsorption of the sensitizing dye. Tani, J .; Imaging Sci. 29, 165 (1985).

  The halogen composition is not particularly limited and may be any of silver chloride, silver chlorobromide, silver chloroiodobromide, silver bromide, silver iodobromide, and silver iodide, preferably silver bromide or Silver iodide or silver iodobromide, more preferably silver bromide or silver iodobromide. Particularly preferred is silver iodobromide, and the silver iodide content is preferably from 0.1 mol% to 40 mol%, more preferably from 0.1 mol% to 10 mol%. The distribution of the halogen composition in the particles may be uniform, the halogen composition may be changed stepwise, or the particles may be continuously changed. An embodiment using silver halide grains having a core / shell structure with a high silver iodide content in the grains is preferred.

(Organic silver salt)
Organic silver salts that can be used in this invention are relatively stable to light, but are heated to 80 ° C. or higher in the presence of an exposed photocatalyst (such as a photographic silver salt) and a reducing agent. In this case, the silver salt forms a silver image.

  The organic silver salt may be any organic material containing a source capable of reducing silver ions. Silver salts of organic acids, particularly long chain fatty carboxylic acids (preferably having 10 to 30 carbon atoms, more preferably 15 to 28 carbon atoms) are preferred.

  Also desirable are complexes of organic or inorganic silver salts where the ligand has a total stability constant in the range of 4.0-10.0. The silver source material should preferably constitute about 5-30% by weight of the photosensitive layer. Preferred organic silver salts include silver salts of organic compounds having a carboxyl group. Examples include, but are not limited to, silver salts of aliphatic carboxylic acids and silver salts of aromatic carboxylic acids. Preferred examples of silver salts of aliphatic carboxylic acids include silver behenate, silver stearate, silver arachidate, silver oleate, silver laurate, silver caproate, silver myristate, silver palmitate, silver maleate, fumaric acid Includes silver, silver tartrate, silver linoleate, silver butyrate and silver camphorate, mixtures thereof, and the like. Silver salts of compounds containing mercapto or thione groups and their derivatives can also be used.

(Silver ion reducing agent)
The silver ion reducing agent is a reducing agent for organic silver salts, and the reducing agent that can be used in the present invention may be any substance, preferably an organic substance, that reduces silver ions to metallic silver. Conventional photographic developers such as phenidone, hydroquinone and catechol are useful, but hindered phenol reducing agents are preferred.

  The reducing agent is preferably present in the range of 1 to 10% by weight of the photographic constituent layer (image forming layer). When the light-sensitive material has a multilayer structure, a slightly higher proportion of about 2 to 15% by weight tends to be more desirable when the reducing agent is added to a layer other than the emulsion layer.

(binder)
The binder suitable for the photothermographic material of the present invention is transparent or translucent and generally colorless, and is a natural polymer synthetic resin, polymer and copolymer, or other medium for forming a film, such as: gelatin, gum arabic, poly (vinyl alcohol) ), Hydroxyethyl cellulose, cellulose acetate, cellulose acetate butyrate, poly (vinyl pyrrolidone), casein, starch, poly (acrylic acid), poly (methyl methacrylic acid), poly (vinyl chloride), poly (methacrylic acid), copoly ( Styrene-maleic anhydride), copoly (styrene-acrylonitrile), copoly (styrene-butadiene), poly (vinyl acetal) s (eg, poly (vinyl formal) and poly (vinyl butyral)), poly (esters), poly (Urethane) , Phenoxy resins, poly (vinylidene chloride), poly (epoxides), poly (carbonates), poly (vinyl acetate), cellulose esters, and polyamides. It may be hydrophilic or non-hydrophilic.

(Other additives)
In the present invention, it is preferable to contain a matting agent on the photosensitive layer side, and in order to prevent damage to the image after heat development, it is preferable to dispose the matting agent on the surface of the photosensitive material. The content is preferably 0.5 to 10% by weight with respect to the total binder on the emulsion layer side.

  The material of the matting agent used in the present invention may be either organic or inorganic. Examples of inorganic substances include silica described in Swiss Patent No. 330,158 and the like, glass powder described in French Patent No. 1,296,995 and the like, and alkali described in British Patent No. 1,173,181 and the like. Earth metals, carbonates such as cadmium and zinc, and the like can be used as the matting agent.

  Examples of organic substances include starch described in U.S. Pat. No. 2,322,037 and the like, starch derivatives described in Belgian Patent 625,451 and British Patent 981,198, and Japanese Patent Publication No. 44-3643. Polyvinyl alcohol described, polystyrene or polymethacrylate described in Swiss Patent No. 330,158, polyacrylonitrile described in US Pat. No. 3,079,257, US Pat. No. 3,022,169 etc. An organic matting agent such as a polycarbonate can be used.

  The shape of the matting agent may be either a regular shape or an irregular shape, but is preferably a regular shape, and a spherical shape is preferably used.

  The present invention has an innermost layer, an outermost layer, and an aluminum foil layer interposed between the innermost layer and the outermost layer. The aluminum foil layer has a polished surface on one side and is matted on the other side. It is a photosensitive material packaging material having a surface, bonded with the polished surface being the outermost layer side, and bonded with the matte surface being the innermost layer side, and can be bonded to a low-cost and strong aluminum foil.

It is a figure which shows the manufacture example of the photosensitive material package. It is a figure which shows the state which takes out and conveys the photosensitive material from a photosensitive material package. It is a figure which shows the formation process of a tray container. It is a perspective view of a tray container. It is sectional drawing of the rising curved part of the side wall part from a bottom part. It is a figure which shows the layer structure of the photosensitive material packaging material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Photosensitive material 2 Tray container 3 Moisture-proof light-shielding bag 3a Photosensitive material packaging material 3a1 Light-shielding / sliding polyolefin resin film layer 3a2 Nylon film layer 3a3 Aluminum foil layer 3a31 Polished surface 3a32 Matte surface 3c Dry laminate bonding with adhesive 3d Melt PE Extrusion lamination adhesion by 4

Claims (7)

The innermost layer,
The outermost layer,
An aluminum foil layer interposed between the innermost layer and the outermost layer;
The aluminum foil layer has a polished surface on one side and a matted surface on the other side,
A photosensitive material packaging material, wherein the polished surface is bonded with the outermost layer side adhered, and the matted surface is bonded with the innermost layer side. The innermost layer is a light-shielding / sliding polyolefin resin film layer mainly composed of an ethylene / α-olefin copolymer resin containing a light-shielding property, a lubricant, an antioxidant, and an antistatic agent. The photosensitive material packaging material according to claim 1, wherein the photosensitive material packaging material is provided. The photosensitive material packaging material according to claim 1, wherein the outermost layer is a nylon film layer. 4. The photosensitive material packaging material according to claim 1, wherein the polished surface is bonded to the outermost layer side by dry lamination bonding using an adhesive. 4. The photosensitive material packaging material according to claim 1, wherein the matte surface is adhered to the innermost layer side by extrusion lamination adhesion using melt PE. 5. Laminate multiple sheets of photosensitive material in a tray container,
A moisture-proof light-shielding bag formed into a bag shape using the photosensitive material packaging material according to any one of claims 1 to 5, and storing the photosensitive material laminated on the tray container,
Packaging with the moisture-proof light-shielding bag. A photosensitive material package in which a plurality of sheet-shaped photosensitive materials are stacked in a tray container and packaged by a moisture-proof light-shielding bag,
6. The photosensitive material package according to claim 1, wherein the moisture-proof light-shielding bag is formed into a bag shape using the photosensitive material packaging material according to any one of claims 1 to 5.

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