JPH0777761A - Silver halide photographic sensitive material - Google Patents

Abstract

PURPOSE:To provide the silver halide photosensitive material firstly having a magnetic recording. layer which has sufficient mechanical strength, maintains a sufficient adhesion property between the magnetic recording layer and a magnetic head in spite of a change in environmental condition, lessens the generation of errors at the time of inputting and reproducing of magnetic signals and is enhanced in the reliability of magnetic recording, secondly having the magnetic recording layer which is lessened in the electrostatic chargeability of a photographic sensitive material and thirdly having the magnetic recording layer which has excellent transparency and good adhesion property. CONSTITUTION:This silver halide photographic sensitive material is formed by using a photographic base consisting of a polyester having a degree of curling 5 to 30m in a transverse direction and has photograph constituting layers on, one side and has a back layer of a thickness of <=7mum on the other. The back layer has at least one layer of conductive layers and has the magnetic recording layer on the outer side of the base than the conductive layers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a silver halide photographic light-sensitive material having a magnetic recording layer, excellent antistatic properties, and excellent curl elimination (adhesion between magnetic recording layer and magnetic head). It is about.

[0002]

2. Description of the Related Art For silver halide photographic light-sensitive materials, for example,
Type of photographic light-sensitive material, manufacturing number, maker name, emulsion No.
Various information related to photographic light-sensitive materials, such as shooting date / time, aperture, exposure time, lighting conditions, filters used, weather, size of shooting frame, model of camera, use of anamorphic lens, etc. Various information when shooting with the camera,
For example, various information necessary for printing such as the number of prints, filter selection, customer color preference, trimming frame size, etc., for example, number of prints, filter selection, customer color preference, trimming frame size. It is necessary to enter various information obtained at the time of printing, such as customer information, etc., from the viewpoint of management, improvement of print quality, and efficiency of print work.

In a conventional photographic light-sensitive material, it is impossible to input all the information, and
At the time of shooting, information such as shooting date / time, aperture, and exposure time was only optically input. Moreover, at the time of printing, it was completely impossible to input the above information into the photographic light-sensitive material because there was no means for that.

Since the magnetic recording system is easy to record / reproduce, the use of the magnetic recording system for inputting the above various information to the photographic light-sensitive material has been studied and various techniques have been proposed.

For example, a stripe-shaped magnetic recording layer in which ferromagnetic fine particles are dispersed is provided on the emulsion surface or the back surface next to the image area to record information such as voice and photographing conditions. Kasho 50-62627, 49-4503, U.S. Pat.Nos. 3,243,376, 3,220,843, etc., and
On the back surface of the photographic light-sensitive material, it is possible to provide a transparent magnetic recording layer having the necessary transparency by selecting the amount of magnetizable particles, size, etc., U.S. Pat.Nos. 3,782,947, 4,279,945, 4,
No. 302,523 etc. Also U.S. Pat.
No. 7,196 and WO90 / 04254 describe a photographing camera having a magnetic head together with a roll-shaped film having a magnetic recording layer containing a magnetic material that enables magnetic recording on the back surface of a photographic film.

By providing these magnetic recording layers, it becomes possible to record the above-mentioned various kinds of information in the photographic light-sensitive material, which has been difficult in the past, and it is possible to record voice and image signals. is doing.

In a silver halide photographic light-sensitive material having a magnetic recording layer, in addition to the performance required for a normal silver halide photographic light-sensitive material, it is necessary to prevent the occurrence of an error at the time of inputting a magnetic signal and at the time of reproduction. is there.

Therefore, it is necessary that the support used in the silver halide photographic light-sensitive material having the magnetic recording layer has sufficient mechanical strength and good contact with the magnetic head. .

In recent years, there has been a demand for miniaturization of cameras. In order to achieve this, it is necessary to reduce the thickness of the support, but by reducing the film thickness, the mechanical strength of the support decreases, and in some cases, obstacles such as breakage from the perforation part. Occurs. Therefore, it is necessary to increase the mechanical strength of the support from the viewpoint of downsizing the camera.

Typical photographic supports conventionally used are triacetate films such as triacetyl cellulose (hereinafter sometimes abbreviated as TAC) and polyester films such as polyethylene terephthalate. In particular, the polyester terephthalate film has an advantage that it has mechanical strength superior to that of the TAC film.

However, when a polyethylene terephthalate film is used as a support for a photographic light-sensitive material having a magnetic recording layer, when it is stored in a roll at a high temperature, a curl is formed, and the curl is eliminated by a developing process. However, there is a problem in that the contact with the magnetic head cannot be sufficiently maintained because of insufficient charge, and an error occurs during input and reproduction of a magnetic signal.

When a magnetic recording layer is provided on a support, in a photographic light-sensitive material provided with the magnetic recording layer, the magnetic head contacts the magnetic recording layer in the process of recording and reproducing information. Therefore, there is a problem that the photographic light-sensitive material is charged and an error occurs at the time of recording input and reproduction.

Various methods have been conventionally known to prevent such troubles. As one of the most known and utilized methods, as described in JP-A-4-62543, a conductive layer containing a conductive substance is formed on the back surface, There are means to accumulate static electricity and make it difficult.

However, according to this method, the electrostatic charge is not sufficiently dissipated in a short time, and in particular, an error occurs or electrostatic discharge occurs when the photographic light-sensitive material is conveyed at a high speed in the process of recording and reproducing information. There was a problem that the commercial value of photographic prints was impaired due to the adherence of dust by.

Furthermore, when polyethylene terephthalate is used to obtain the mechanical strength of the support, it is very easy to be charged, which may cause a further serious problem.

[0016]

The first object of the present invention is to have sufficient mechanical strength so that the adhesion between the magnetic recording layer and the magnetic head will be sufficient even if environmental conditions change. It is an object of the present invention to provide a silver halide photographic light-sensitive material having a magnetic recording layer in which the occurrence of errors during magnetic signal input and reproduction is reduced and the reliability of magnetic recording is improved.

A second object of the present invention is to provide a silver halide photographic light-sensitive material having a magnetic recording layer in which the chargeability of the photographic light-sensitive material is reduced.

A third object of the present invention is to provide a silver halide photographic light-sensitive material having a magnetic recording layer which is excellent in transparency and adhesiveness.

[0019]

The above object of the present invention can be achieved by any one of the following constitutions.

A silver halide photographic light-sensitive material using a photographic support made of polyester having a degree of curl in the width direction of 5 to 30 m ^-1 , which has a photographic constituent layer on one side and a thickness of 7 μm or less on the other side. A silver halide photographic light-sensitive material having a layer, having at least one conductive layer as the back layer, and having a magnetic recording layer outside the conductive layer with respect to the support.

The polyester layer contains, as a copolymerization component, an aromatic dicarboxylic acid having a metal sulfonate group and / or
Alternatively, the silver halide photographic light-sensitive material described above using a photographic support containing a polyalkylene glycol and / or a saturated aliphatic dicarboxylic acid.

Two or more different polyesters different from each other are laminated, and any one or more polyester layers different from each other are used as a copolymerization component of aromatic dicarboxylic acid having a metal sulfonate group and / or polyalkylene. The silver halide photographic light-sensitive material as described above, which uses a photographic support containing a glycol and / or a saturated aliphatic dicarboxylic acid.

A photographic support is used which comprises two or more layers of two or more different polyesters laminated together, and the laminated structures on both sides of the photographic support are asymmetrical with respect to the position where the thickness is divided into two parts. The silver halide photographic light-sensitive material as described in any of the above.

The silver halide photographic light-sensitive material as described above, wherein the photographic support made of polyester is a polyester containing naphthalenedicarboxylic acid and ethylene glycol as main components.

The present invention will be specifically described below.

First, the magnetic recording layer will be described.

The magnetic fine powder used in the magnetic recording layer of the present invention includes metal magnetic powder, iron oxide magnetic powder, and C.
o Doped iron oxide magnetic powder, chromium dioxide magnetic powder,
Barium ferrite magnetic powder can be used.

The manufacturing method of these magnetic powders is known,
The magnetic powder used in the present invention can also be manufactured according to a known method.

The shape and size of the magnetic powder are not particularly limited and can be widely used. The shape may be any shape such as a needle shape, a rice grain shape, a spherical shape, a cubic shape, or a plate shape, but a needle shape or a plate shape is preferable in terms of electromagnetic conversion characteristics. There are no particular restrictions on the crystallite size or specific surface area. The magnetic powder may be surface-treated. For example, it may be surface-treated with a substance containing an element such as titanium, silicon or aluminum, or may be adsorbed with a nitrogen-containing heterocycle such as carboxylic acid, sulfonic acid, sulfuric acid ester, phosphonic acid, phosphoric acid ester or benzotriazole. It may be treated with an organic compound such as a polar compound. The pH of the magnetic powder is not particularly limited, but it is 5-10
It is preferably within the range.

As the metal magnetic powder, for example, the metal content is 75% by weight or more, and 80% by weight or more of the metal content is a ferromagnetic metal or alloy (Fe, Co, Ni, Fe-Co, Fe-N).
i, Co-Ni, Co-Fe-Ni, etc., and 20% by weight or less of other components (Al, Si, S, Sc, Ti, V, Cr, Mn, C).
u, Zn, Y, Mo, Rh, Pd, Ag, Sn, Sb, B, B
a, Ta, W, Re, Au, Hg, Pb, P, La, Ce, P
r, Nd, Te, Bi, etc.) are included. Further, the ferromagnetic metal component may contain a small amount of hydroxide or oxide.

Examples of the iron oxide magnetic powder include γ-iron oxide. The ratio of divalent iron / trivalent iron in iron oxide can be used without particular limitation.

Regarding these magnetic recording layers, Japanese Patent Laid-Open No.
-32812 and 53-109604.

Regarding the size of magnetic particles, it is "television" that there is a correlation between the size and the transparency.
Volume 20, No. 2 "Characteristics of Ultrafine Particle Semi-Transparent Magnetic Recording Medium and Its Application". For example, in the acicular powder of γ-Fe ₂ O ₃ , the light transmittance is improved by reducing the particle size.

US Pat. No. 2,950,971 describes that a magnetic layer made of magnetic iron oxide dispersed in a binder transmits infrared rays, and US Pat. No. 4,279,945.
The publication describes that, even when the concentration of magnetic particles in the magnetic layer is relatively high, decreasing the particle size improves the transmittance of helium / neon laser light having a wavelength of 632.8 nm.

However, when the magnetic recording layer is provided in the image forming region of the silver halide color photographic light-sensitive material, not only the red region but also the green region and the blue region must have high light transmittance.

In order to increase the light transmittance in the red region, the green region and the blue region, the particle size of the magnetic particles is reduced and the coating amount of the magnetic particles is also limited.

If the particle size of the magnetic particles is made smaller than a certain level, the required magnetic properties cannot be obtained. Therefore, it is preferable to make the particle size of the magnetic powder small within the range where the required magnetic characteristics are obtained. Further, if the coating amount of the magnetic particles is reduced to a certain extent or more, the required magnetic characteristics cannot be obtained, so it is preferable to reduce the coating amount within the range where the required magnetic characteristics are obtained.

Practically, the coating amount of the magnetic powder is 0.001
˜3 g / m ² , more preferably 0.01 to 1 g / m ² .

As the binder used in the magnetic recording layer, known thermoplastic resins, radiation-curable resins, thermosetting resins, other reactive resins and the like which have been conventionally used as binders for magnetic recording media are used. Mixtures of can be used.

As the above-mentioned thermoplastic resin, vinyl chloride-
Vinyl acetate copolymer, vinyl chloride resin, vinyl acetate and vinyl alcohol copolymer, vinyl chloride-vinylidene chloride copolymer, vinyl chloride-acrylonitrile copolymer,
Vinyl-based polymers or copolymers such as ethylene-vinyl alcohol copolymer, chlorinated polyvinyl chloride, ethylene-vinyl chloride copolymer, ethylene-vinyl acetate copolymer, nitrocellulose, cellulose acetate propionate, cellulose Cellulose derivatives such as acetate butyrate resin, maleic acid and / or acrylic acid copolymer, acrylonitrile-styrene copolymer, chlorinated polyethylene, acrylonitrile-chlorinated polyethylene-styrene copolymer, methyl methacrylate-butadiene-styrene copolymer Combined, acrylic resin, polyvinyl acetal resin, polyvinyl butyral resin, polyester polyurethane resin, polyether polyurethane resin, polycarbonate polyurethane resin, polyester resin,
Examples thereof include rubber resins such as polyether resins, polyamide resins, amino resins, styrene-butadiene resins, butadiene-acrylonitrile resins, silicone resins, and fluorine resins.

The above thermoplastic resin has a Tg of -40 ° C to 150 ° C.
C., preferably 60.degree. C. to 120.degree. C., with a weight average molecular weight of 10,000 to 300,000, more preferably 50,000 to 200,000.

The radiation-curable resin is a resin which is cured by radiation such as electron beam or ultraviolet ray, and examples thereof include maleic anhydride type, urethane acryl type, ether acryl type and epoxy acryl type.

Examples of thermosetting resins and other reactive resins include phenolic resins, epoxy resins, polyurethane-based curable resins, urea resins, alkyd resins, and silicone-based curable resins.

The binders listed above may have a polar group in the molecule. Epoxy group as polar group, -CO
OM, -OH, -NR ₂ , -NR ₃ X, -SO ₃ M, -OSO ₃ M, -PO
₃ M ₂ and -OPO ₃ M (M is hydrogen, alkali metal or ammonium, X is an acid forming an amine salt, and R is hydrogen or an alkyl group).

A hydrophilic binder may also be used as the binder for the magnetic recording layer of the present invention.

The hydrophilic binder usable in the present invention is, for example, Research Disclosure No. 17643,
Water-soluble polymers, cellulose ethers, latex polymers, and water-soluble polyesters described on page 26, and No. 18716, page 651 can be mentioned.

As the water-soluble polymer, gelatin, gelatin derivative, casein, agar, sodium alginate, starch, polyvinyl alcohol, acrylic acid type copolymer,
Examples include maleic anhydride copolymers, examples of cellulose ethers include carboxymethyl cellulose and hydroxyethyl cellulose, and examples of latex polymers include vinyl chloride-based copolymers, vinylidene chloride-based copolymers, acrylic ester-based copolymers. Examples of the latex include polymers, vinyl acetate-based copolymers, butadiene-based copolymers and the like. Of these, gelatin is the most preferable.

Gelatin may be unmodified or modified. In addition, some of them are colloidal albumin, casein, carboxymethyl cellulose, cellulose derivatives such as hydroxyethyl cellulose, agar, sodium alginate, starch derivatives, sugar derivatives such as dextran, synthetic hydrophilic colloids, for example,
It may be replaced with polyvinyl alcohol, poly N-vinylpyrrolidone, acrylic acid copolymer, polyacrylamide or derivatives thereof, partial hydrolysates, gelatin derivatives and the like.

The hydrophilic binder containing gelatin is preferably hardened. Examples of hardeners that can be used include
Aldehyde compounds such as formaldehyde and glutaraldehyde, ketone compounds such as diacetyl and cyclopentanedione, bis (2-chloroethylurea), 2-hydroxy-4,6-dichloro-1,3,5-triazine, US Patent number 3,
288,775, 2,732,303, UK Patent 974,723,
Reactive halogen-containing compounds described in 1,167,207, divinyl sulfone, 5-acetyl-1,3-
Diacryloyl hexahydro-1,3,5-triazine, U.S. Pat.Nos. 3,635,718 and 3,232,763, British Patent 994,86
Compounds having reactive olefins described in No. 9, N-hydroxymethylphthalimide, US Patent No.
2,732,316, N-methylol compounds described in 2,586,168 and the like, isocyanates described in U.S. Pat.No. 3,103,437, U.S. Pat.No. 3,017,280,
2,983,611 and the like, aziridine compounds, U.S. Pat.Nos. 2,725,294, 2,725,295 and the like acid derivatives, U.S. Pat. Such halogen carboxaldehydes can be mentioned. Further, it is also possible to use an inorganic hardener, and as the inorganic hardener, there are chrome alum and zirconium sulfate, and Japanese Patent Publication Nos. 56-12853 and 58-32699.
Belgian Patent No. 825,726, JP 60-225148, JP Sho
51-126125, JP-B-58-50699, JP-A-52-54427,
The carboxyl group-activating type hardeners described in US Pat. No. 3,321,313 and the like can also be mentioned.

Hardeners are typically 0.
It is used in an amount of 01 to 30% by weight, preferably 0.05 to 20% by weight.

The magnetic powder is dispersed in the binder using a solvent, if necessary, to form a coating liquid. A ball mill, homomixer, sand mill, or the like can be used to disperse the magnetic powder. In this case, it is preferable to disperse the magnetic particles one by one as much as possible without damaging the magnetic particles.

When forming an optically transparent magnetic recording layer, the binder is preferably used in an amount of 1 to 20 parts by weight based on 1 part by weight of the magnetic powder. More preferably, it is 2 to 15 parts by weight with respect to 1 part by weight of the magnetic powder. Further, the solvent is used in such an amount that the coating can be easily performed.

As a method for providing the magnetic recording layer on the support, air doctor coat, blade coat, air knife coat, squeeze coat, impregnation coat, reverse roll coat, transfer roll coat, gravure coat, kiss coat, cast coat, A spray coat can be used. In order to perform multi-stripe coating, these coating heads may be arranged in multiple rows. Specific methods of stripe coating include, for example, JP-A-48-25503.
48-25504, 48-98803, 50-138037, 52-15
533, 51-3208, 51-6239, 51-65606, 5
1-140703, Japanese Patent Publication No. 29-4221, U.S. Pat.No. 3,062,181
Nos. 3,227,165 can be referred to.

In order to firmly adhere these magnetic recording layers to the support, an undercoat layer may be provided on the support, and the support may be subjected to chemical treatment, mechanical treatment, corona discharge treatment,
Flame treatment, ultraviolet treatment, high frequency treatment, glow discharge treatment,
Surface activation treatment such as active plasma treatment, laser treatment, concentrated acid treatment, or ozone oxidation treatment may be performed. Furthermore, an undercoat layer may be provided after the surface activation treatment.

The coating liquid for forming the magnetic recording layer contains a lubricant and an antistatic agent in order to impart functions to the magnetic recording layer such as imparting lubricity, preventing electrification, preventing adhesion, and improving friction and abrasion characteristics. Various additives such as agents can be added. In addition, in addition to the coating liquid, for example, a plasticizer for giving flexibility to the magnetic recording layer, a dispersant for aiding dispersion of the magnetic substance in the coating liquid, and for preventing clogging of the magnetic head. Abrasives can be added.

Examples of lubricants include silicone oils such as polysiloxane, plastic fine powders such as polyethylene and polytetrafluoroethylene, higher fatty acids, higher fatty acid esters, and fluorocarbons. These may be used alone or in combination. These may be added in an amount of 0.2 to 20 parts by weight with respect to 100 parts by weight of the binder.

Examples of the polishing agent include non-magnetic inorganic powders having a Mohs hardness of 5 or more, preferably 6 or more. Specifically, aluminum oxide (α-alumina, γ-alumina, corundum, etc.), chromium oxide ( Cr ₂ O ₃ ), iron oxide (α-Fe
₂ O ₃ ), oxides such as silicon dioxide and titanium dioxide, carbides such as silicon carbide and titanium carbide, and fine powders such as diamond. The average particle size of these is 0.05 to
1.0 μm is preferable, and it can be added in the range of 0.5 to 20 parts by weight with respect to 100 of the magnetic powder.

If necessary, the layer adjacent to the magnetic recording layer may be provided with a layer for supplementing adhesion with other layers, or an adjacent protective layer may be provided to improve scratch resistance. For imparting scratch resistance, a compound generally known as a slip agent can be used, but higher fatty acid esters are preferable. Further, when the magnetic recording layer is provided in a stripe shape, a transparent polymer layer containing no magnetic material may be provided on the magnetic recording layer to eliminate the step due to the magnetic recording layer. In this case, the transparent polymer layer may have various functions described above.

After providing the magnetic recording layer, calendering is performed on this layer to improve smoothness, and S of magnetic output is obtained.
It is also possible to improve the / N ratio. In this case, it is preferable to apply the silver halide photographic light-sensitive layer after the calendering treatment.

Next, the layer to which conductivity is imparted according to the present invention will be described.

To impart conductivity, it can be formed by containing a conductive substance. Examples of the substance that imparts conductivity include conductive polymers,
Inorganic metal oxides can be mentioned.

The conductive polymer is not particularly limited and may be any of anionic, cationic, amphoteric and nonionic, and among them, anionic and cationic are preferable. More preferred are sulfonic acid-based and carboxylic acid-based polymers when anionic, and tertiary amine-based and quaternary ammonium-based polymers or latexes when cationic.

These conductive polymers are disclosed, for example, in Japanese Patent Publication
52-25251, JP-A-51-29923 and JP-B-60-48024, anionic polymers or latexes, JP-B-57-18176
No. 57-56059, No. 58-56856, U.S. Pat.No. 4,118,23
Examples thereof include the cationic polymers or latexes described in No. 1 and the like.

Specific examples of these conductive polymers or latices will be described below, but the present invention is not limited thereto.

[0065]

[Chemical 1]

[0066]

[Chemical 2]

[0067]

[Chemical 3]

[0068]

[Chemical 4]

These conductive polymers can be used alone, but can be coated with other binders in combination. Furthermore, curing agents can also be used with these binders.

The content of the conductive polymer of the present invention is preferably 0.005 to 5 g / m ² , and more preferably 0.01 to 3
g / m ^2, more preferably from 0.02 to 1 g / m ^2.

When a binder is used in combination, the weight ratio of the conductive polymer or latex to the binder is 99: 1.
To 10:90 are preferred, 80:20 to 20:80 are more preferred, and 70:30 to 30:70 are particularly preferred.

As the inorganic metal oxide, there is disclosed in JP-A-56-14343.
Crystalline metal oxide particles as disclosed in No. 1 or amorphous stannic oxide sol as disclosed in JP-B-35-6616, described in JP-A-55-5982. Amorphous vanadium pentoxide, alumina sol having an electrolyte as disclosed in JP-B-57-12979 can be mentioned.

The inorganic metal oxide of the present invention has conductivity, and its volume resistivity is 10 ⁷ Ωcm or less.

With respect to the value of the volume resistivity referred to here, in the case of an oxide which can obtain a large single crystal, it means the value of the volume resistivity of the single crystal, and when the large single crystal cannot be obtained, it is a powder. It means the volume resistivity of a sintered body obtained by molding a body. When these values are unknown, a value obtained by dividing the volume resistivity of the molded body obtained by applying a constant pressure in the powder state by 10 ² is adopted. The constant pressure is not particularly limited, but a pressure of 10 kg / cm ² or more is preferable, and a pressure of 100 kg / cm ² or more is more preferable, and the volume resistivity of the material formed is divided by 10 ² . Adopt a value. With respect to the pressure applied to the powder and the volume resistivity of the molded body, generally, the higher the pressure, the lower the volume resistivity. However, even when an isostatic pressure of 3 t / cm ² is applied by a hydrostatic pressure device, a value lower than the volume specific resistance value obtained with a single crystal cannot be obtained, and the value is about 100 times higher. Therefore, a value obtained by dividing the volume resistivity of the molded body obtained by applying a constant pressure in the powder state by 10 ² is adopted.

The particle size of the inorganic metal oxide used is preferably 1 μm or less, but when it is 0.5 μm or less, the stability after dispersion is good and it is easy to use. Further, in order to make the light scattering property as small as possible, it is preferable that it is 0.3 μm or less because a transparent photosensitive material can be formed.

In this respect, when the inorganic metal oxide is a metal oxide sol, a particle size of 0.1 μm or less is particularly preferable for obtaining transparency.

Regarding the particle size, it is preferable to adopt the average particle diameter obtained by measurement of a particle size distribution meter by a sedimentation method, a laser diffraction method or the like, but the particle diameter may be determined by an electron micrograph. When using an electron microscope, the shortest particle size in the field of view is adopted.

The inorganic metal oxide of the present invention is preferably coated with a binder. As a binder,
Although not particularly limited, the binder used for the magnetic layer described above, that is, a hydrophilic binder such as gelatin or polyvinyl alcohol, or a thermoplastic resin such as polyvinyl chloride, polyvinyl acetate, nitrocellulose, or polyurethane may be used. It may be used in the solvent or in the form of an aqueous dispersion.

Furthermore, a curing agent can be used together with these binders.

The content of the inorganic metal oxide of the present invention is preferably 0.0005 to 1 g / m ² , and more preferably 0.001.
˜0.5 g / m ² , particularly preferably 0.002 to 0.4 g / m ² .

The back layer used in the present invention has a thickness of 7
It is not more than μm, preferably not more than 5 μm, more preferably not more than 4 μm.

In the present invention, the conductive layer contained in the back layer is provided closer to the support than the magnetic recording layer.

The thickness of the conductive layer is not particularly limited, but the conductive layer is preferably 0.01 μm or more and 3 μm or less, more preferably the conductive layer 0.05 μm or more and 2.5 μm or less, and further preferably the conductive layer 0.1. It is not less than μm and not more than 2 μm.

The thickness of the magnetic recording layer is not particularly limited,
It is preferably 0.1 μm or more and 3 μm or less, more preferably 0.2 μm or more and 2 μm or less, and further preferably 0.3 μm
It is m or more and 1.5 μm or less.

If necessary, an adhesive layer may be provided between the conductive layer and the magnetic recording layer within a range that does not impair the effects of the present invention.

The polyester as a material for forming the support of the present invention is one having a repeating unit of dicarboxylic acid and diol as a main constituent, and preferably a repeating unit of aromatic dibasic acid and glycol. Polyester as a main component can be mentioned.

Examples of the dibasic acid include terephthalic acid, isophthalic acid and naphthalenedicarboxylic acid, and examples of the diol or glycol include ethylene glycol, propylene glycol, butanediol, neopentyl glycol and 1,4-cyclohexanediene. Examples include methanol, diethylene glycol and p-xylene glycol. Of these, polyethylene terephthalate containing terephthalic acid and ethylene glycol as main constituents and polyethylene-2,6-naphthalate containing 2,6-naphthalenedicarboxylic acid and ethylene glycol as main constituents are preferable.

Further, a copolymer of two or more kinds of dibasic acids and one or more kinds of diols can be used. For example,
Examples of the polyester include terephthalic acid, 2,6-naphthalenedicarboxylic acid, and elene glycol as main constituent components.

A blend of two or more polyesters may be used. For example, a blend of polyethylene terephthalate and polyethylene-2,6-naphthalate can be used.

Further, a copolymer containing 85 mol% or more, preferably 90 mol% or more of these main repeating units may be used as long as the original excellent properties of polyester are not impaired, and other polymers may be blended. May be done.

The intrinsic viscosity of the polyester is preferably, but not limited to, 0.45 to 0.80, particularly preferably 0.55 to 0.70, from the viewpoint of stretchability during the production of a laminated film.

The copolymerized polyester as the material for forming the support of the present invention is preferably an aromatic dicarboxylic acid having a metal sulfonate group as a copolymerization component and a repeating unit of a dicarboxylic acid and a diol as a main constituent. Can be a copolyester having aromatic dibasic acid and glycol as main constituents. Further, in the present invention, as the copolyester, a blended product of the above-mentioned copolyester and polyester can also be mentioned.

Examples of the dibasic acid include terephthalic acid, isophthalic acid and naphthalenedicarboxylic acid, and examples of the glycol include ethylene glycol and
Examples include propylene glycol, butanediol, neopentyl glycol, 1,4-cyclohexanedimethanol, diethylene glycol and p-xylene glycol. Among the copolyesters, among others, copolyethylene terephthalate containing terephthalic acid and ethylene glycol as main constituents, and copolyethylene terephthalate containing 2,6-naphthalenedicarboxylic acid and ethylene glycol as main constituents.
-2,6-naphthalate is preferred.

The preferred intrinsic viscosity of the copolyester is not particularly limited, but is preferably 0.35 to 0.75 from the viewpoint of stretchability during production of the laminated film, and particularly preferably 0.
45 to 0.65 is preferable.

Aromatic dicarboxylic acids containing a metal sulfonate group as a copolymerization component in the copolyester are 5-sodium sulfoisophthalic acid, 2-sodium sulfoterephthalic acid, 4-sodium sulfoterephthalic acid, 4-sodium sulfo- Examples thereof include 2,6-naphthalenedicarboxylic acid or an ester-forming derivative represented by the following chemical formula 5 and compounds obtained by substituting these sodiums with other metals such as potassium and lithium.

[0096]

[Chemical 5]

The above-mentioned copolymerized polyester preferably contains a polyalkylene glycol and / or a saturated aliphatic dicarboxylic acid as a copolymerization component as long as the effects of the present invention are not impaired.

As the polyalkylene glycols, polyethylene glycol, polytetramethylene glycol and derivatives thereof are used. Among them, the polyethylene glycol represented by the formula (a) is preferable, and the molecular weight is not particularly limited, but is 300 to 20000. Is more preferably used, more preferably from 600 to 10,000, and particularly preferably from 1000 to 5000.

H (O—CH ₂ CH ₂ ) _n —OH (a) In addition, as the polyalkylene glycols, the terminal —H of polyethylene glycol is replaced with —CH ₂ COOR (R: H or alkyl having 1 to 10 carbon atoms). Group, n: a positive integer) and substituted with a polyethyleneoxydicarboxylic acid represented by the formula (b) or a polyether dicarboxylic acid represented by the formula (c) (R ': alkylene having 2 to 10 carbon atoms). Group, n: positive integer) and the like, the same effect can be obtained.

ROOCCH ₂ — (O—CH ₂ CH ₂ ) _n —OCH ₂ COOR (b) ROOCCH ₂ — (0-R ′) _n —OCH ₂ COOR (c) (b), (c) The molecular weight of the compound is also not particularly limited, but it is preferably 300 to 20000, more preferably 600 to 10000, and particularly preferably 1000 to 5000.

As the saturated aliphatic dicarboxylic acid, for example, its ester-forming derivative is preferable, and adipic acid, dimethyl adipate, which is an ester of sebacic acid, dimethyl sebacate and the like can be used. Dimethyl adipate is preferred.

The copolymerized polyester used in the present invention may be further copolymerized with other components or may be blended with other polymers as long as the effects of the present invention are not impaired.

-Production of Polyester and Copolyester-The polyester and copolyester used in the present invention are both phosphoric acid, phosphorous acid and their esters and inorganic particles (silica, kaolin, calcium carbonate, calcium phosphate) in the polymerization stage. , Titanium dioxide, etc.) or inorganic particles may be blended with the polymer after polymerization. Further, a pigment, an ultraviolet absorber, an antioxidant and the like may be added appropriately at any stage of the polymerization and after the polymerization.

To obtain the copolyester, the acid component and the glycol component may be transesterified, and then the above-mentioned copolymerization component may be added to carry out melt polymerization, or the copolymerization component may be transesterified. Melt polymerization may be carried out after the ester is added before the transesterification, or a known synthesis method such as solid-phase polymerization of the polymer obtained by the melt polymerization may be employed.

Examples of the catalyst used for the transesterification include acetates, fatty acid salts, carbonates of metals such as manganese, calcium, zinc and cobalt. Among these, hydrates of manganese acetate and calcium acetate are preferable, and a mixture of these is preferable. It is also effective to add a metal salt of a hydroxide or an aliphatic carboxylic acid, a quaternary ammonium salt or the like within a range that does not hinder the reaction or color the polymer during the transesterification and / or the polymerization. Sodium hydroxide,
Sodium acetate, tetraethylhydroxyammonium and the like are preferable, and sodium acetate is particularly preferable.

The polyester or copolymerized polyester for forming the photographic support of the present invention may contain various additives. For example, a dye may be added to the polyester or copolymerized polyester for the purpose of preventing a light piping phenomenon (fogging) that occurs when light is incident from the edge of a photographic support coated with a photographic emulsion layer. . The type of this dye is not particularly limited, but it is preferable that it has excellent heat resistance in the film forming process, and examples thereof include anthraquinone-based chemical dyes. As for the color tone, gray dyeing is preferable as seen in general light-sensitive materials, and one kind or two or more kinds of dyes may be mixed and used.

-Layer Structure of Polyester- The layer structure of the polyester layer and / or the copolyester layer of the photographic support of the present invention may be a single layer structure composed of any one of these layers, or any one of them. May have a laminated structure in which an arbitrary number of layers such as two layers, three layers, and four layers are laminated. A preferred layer structure is a multilayer structure of two or more layers. The “polyester layer” included in the support of the present invention is limited to a layer having a thickness of 2 μm or more, and a subbing layer having a thickness of less than 2 μm is not regarded as a “polyester layer”. .

-Support having Polyester Layer Having Single Layer Structure-When the polyester layer contained in the support of the present invention is a single layer, it is particularly preferably a copolyester layer. Here, the copolyester layer can be formed of the above-mentioned copolyester or a blend of the copolyester and the polyester.

When a single-layer film is formed from the above-mentioned copolymerized polyester, the content ratio of the aromatic dicarboxylic acid containing a metal sulfonate group as a copolymerization component is 1 to 10 mol% based on all ester bonds, Preferably 2
~ 7 mol%. By setting the content of the aromatic dicarboxylic acid having a metal sulfonate group within the above range, the curl-eliminating property after the developing treatment and the curl-before the developing treatment can be made more difficult.

The thickness of the polyester layer having a single-layer structure is usually
It is 50 to 130 μm, preferably 65 to 110 μm.

The single-layer polyester film of the present invention can be manufactured as follows. That is, a method for obtaining an unstretched sheet may be a conventionally known method,
For example, a method may be mentioned in which the obtained resin is sufficiently dried, then melt-extruded in a sheet form through a filter and a die, cast on a rotating cooling drum, and cooled and solidified.

As a method for biaxially stretching the finished sheet, for example, the following processes (A) to (C) can be adopted.

(A) A method in which an unstretched sheet is first stretched in the longitudinal direction and then in the transverse direction (B) A method in which an unstretched sheet is first stretched in the transverse direction and then in the longitudinal direction (C) Unstretched A method in which the sheet is stretched in the longitudinal direction in one or multiple stages, then stretched in the longitudinal direction again, and then stretched in the transverse direction. The above stretching is performed to satisfy the mechanical strength, dimensional stability and the like of the photographic support. The area ratio is preferably 4 to 16 times. The heat setting can be performed in the temperature range of 150 to 240 ° C.

-Photographic Support Having Polyester Layer of Laminate Structure-When the film of the present invention has a laminate structure of two or more layers, generally the thickness of each layer is appropriately determined depending on the polyester and the copolyester used. However, preferably, the ratio of the total thickness d ₅ of the copolyester layer to the total thickness d ₄ of the polyester layer is 0.7 ≦ d ₅ / d ₄ ≦
3, more preferably 1 ≦ d ₅ / d ₄ ≦ 2, and the total thickness d ₄ of the polyester layer is preferably 50 μm or less, more preferably 40 μm or less.

The total thickness of the laminated film is not particularly limited, but is preferably 40 to 130 μm, and particularly preferably 65 to 100 μm.
If it is thinner than this range, the required strength may not be obtained in some cases, and if it is thicker, it is not superior to the conventional photographic support. Further, when the film has a laminated structure composed of a polyester layer and a copolyester layer, if the total thickness of the polyester layers exceeds 50 μm, the curl resolving property may be poor, which is not preferable.

Further, even when the laminated structure of the polyester layer is two or three layers, even in the laminated structure of four or more layers, the polyester layer of the laminated structure is centered around the position where the thickness is divided into two. When the film is divided into two parts on the laminated surface, if the layer structure above and below the divided surface is asymmetric, handling is easy, for example, when applied to a photographic film, a photographic support with excellent insertability at the entrance of a splicer processor. Become a body.

The term "asymmetrical" as used herein means that they are physically, mechanically or chemically different. For example, the order in which the polyester layer, the copolyester layer or layers made of other materials are constituted, the polyester layer, the copolyester. The thickness of the layer or the layer made of other materials, the amount of main constituent components constituting the polyester or copolymerized polyester above and below the surface to be divided in half is different, or the amount of the copolymerization component or the copolymerization component is different, or Means that the intrinsic viscosities are different, and that the type of the copolymerization component or the content of the copolymerization component is different in any of the respective polyester layers on the dividing surface.

As a method for confirming the asymmetry of these laminated polyester layers, various analytical instruments can be used, and the layer constitution is not particularly limited, but the cross section of the film can be confirmed by microscopic observation. It can also be confirmed by taking a micrograph. Also, while observing this with a microscope,
Scrap each layer or cut it into halves to obtain the analytes of the upper and lower layers or each layer, and measure with various measuring devices such as liquid chromatography or NMR by hydrolysis. Alternatively, after the analyte is dissolved in a solvent, NMR analysis or
GPC (gel permeation chromatography) analysis, intrinsic viscosity measurement, or the like may be performed, or the analysis target may be directly subjected to X-ray spectroscopic analysis with powder, or IR (infrared spectroscopic instrument) mixed with KBr or the like. As a result, the asymmetry of both outer layers can be confirmed or measured by the absolute amount, or the position of the peak of the measurement result corresponding to the absolute amount, the difference in intensity, or the like.

The polyester layer of the photographic support of the present invention is not limited to two layers, three layers, and four layers or more, and is not limited thereto. When the film is rolled and used by imparting a width curl by appropriately adjusting the above-mentioned items such as the amount of the copolymerization component, the concave surface of the film of the present invention is unwound to be rolled. It is possible to further increase the effect of the present invention in that it is difficult for the curling to occur.

When it has a laminated structure of two or more layers, it can be manufactured as follows. That is,
For example, polyester and copolyester are melt extruded from separate extruders, and then extruded by joining them in a laminar flow in a conduit of the molten polymer or in an extrusion die,
After cooling and solidifying on a cooling drum to obtain an unstretched film,
Method of biaxially stretching and heat setting, or polyester or copolymerized polyester simple substance, and melt-extruding a laminated film from an extruder, unstretched film cooled and solidified on a cooling drum or uniaxially oriented film uniaxially stretched the unstretched film The surface is coated with an anchor agent, an adhesive, etc., if necessary, and then the polyester or copolymerized polyester alone and the laminated film are extrusion laminated, and then the biaxially stretching is completed, and then the heat lamination is carried out. Although there are methods, etc., the coextrusion method is preferable because of the simplicity of the process.

The stretching conditions in this case are not particularly limited, but in general, from the higher glass transition temperature (Tg) Tg to Tg of the polyester layer or the copolyester layer.
Stretch in the biaxial direction in the temperature range of + 100 ° C. At this time, similar to the stretching method of the above-mentioned single-layer polyester layer, the above A, B,
The method of C can be adopted. The draw ratio is an area ratio of 4 to
It is preferable to carry out in the range of 16 times. The heat setting is 15
It can be performed in a temperature range of 0 to 240 ° C.

The photographic support of the present invention has a degree of curl in the width direction of 5 to 30 m ^-1 , more preferably 5 to 20.
m ^-1 .

The method of adjusting the degree of curl in the width direction of the photographic support to 5 to 30 m ^-1 , more preferably 5 to 20 m ^-1 , is not particularly limited, but the following method is preferably used.

A method of film-forming polyester or copolyester, biaxially stretching the film, then permeating one side of the film with an organic solvent such as toluene, phenol, hexane, and then heat-treating and drying.

In forming a polyester film, a temperature difference is provided between the front and back of the film during longitudinal stretching,
A method in which longitudinal stretching is performed, or when heat setting is performed, a temperature difference is applied between the front and back to perform heat setting.

Further, the adjustment of the curl degree in the width direction is performed by
It can also be carried out by laminating a polyester layer and a copolyester layer. In the film in which the copolyester layers are laminated, the curl degree in the width direction can be adjusted by appropriately adjusting the film thickness and the composition amount.

Further, for the purpose of reducing the curling of the photographic support made of polyester, it is disclosed in JP-A-51-16358 and JP-A-51-16358.
The method described in 6-35118 or the like can be preferably used.

That is, it is a method of heat-treating at a temperature of 50 ° C. or higher and a glass transition point or lower for 0.1 to 1500 hours.

Since this heat treatment is performed at a high temperature of 50 ° C. or higher, if it is performed after coating the emulsion, it tends to cause deterioration of the performance of the emulsion layer. Therefore, it is desirable to do it before coating the emulsion layer.

Typical examples of the photographic light-sensitive material having the magnetic recording layer of the present invention include a black-and-white light-sensitive material, a color negative light-sensitive material, and a color reversal light-sensitive material.

The silver halide grain contained in the silver halide photographic emulsion may be a grain in which a latent image is mainly formed on the surface, or may be a grain in which a latent image is mainly formed inside the grain.

The silver halide grains may have a regular crystal form such as a cube, octahedron or tetradecahedron,
It may have an irregular crystal shape such as a sphere or a plate. In these grains, any ratio of {100} plane to {111} plane can be used. Further, it may have a composite form of these crystal forms, and grains of various crystal forms may be mixed, but twin silver halide grains having two parallel twin planes facing each other are preferable. .

A twin is a silver halide crystal having one or more twin planes in one grain, and the morphology of twins is classified by Klein and Moiser in the article Photographiesche Correspondents. (Photographishe Korrespondenz)
Volume 99, page 99, volume 100, page 57.

In the present invention, when tabular silver halide grains are used, the average ratio of the diameter to the thickness of tabular grains (also referred to as aspect ratio) is preferably less than 5, more preferably 1.1 or more. Less than 4.5, particularly preferably
It is 1.2 or more and less than 4. This average value is obtained by averaging the ratio of diameter to thickness of all tabular grains.

The diameter of the silver halide grain is represented by the diameter of the circle equivalent to the projected area of the silver halide grain (the diameter of the circle having the same projected area as the silver halide grain),
The thickness is preferably 5.0 μm, more preferably 0.2 to 4.0 μm, and particularly preferably 0.3 to 3.0 μm.

As the silver halide photographic emulsion, any one such as a polydisperse emulsion having a wide grain size distribution and a monodisperse emulsion having a narrow grain size distribution can be used, but a monodisperse emulsion is preferable.

Here, as the monodisperse silver halide emulsion,
It is preferable that the weight of silver halide contained in the grain size range of ± 20% around the average grain size r is 60% or more, more preferably 70% or more, and still more preferably the weight of all silver halide grains. 80% or more.

[0138] Here, the average particle diameter r is the product ni × ri ³ of the frequency ni and ri ³ particles having a particle size ri is defined as the particle size ri when the maximum (three significant figures, the minimum Digits and numbers are rounded to 4).

The grain size ri referred to here is the diameter of a silver halide grain when the projected image of the silver halide grain is converted into a circular image of the same area.

The particle size ri can be obtained, for example, by enlarging the particles by an electron microscope at a magnification of 10,000 to 70,000 and measuring the particle diameter on the print or the area at the time of projection (measurement). The number of particles shall be indiscriminately 1,000 or more.)

Particularly preferred highly monodisperse emulsions of the present invention are

[0142]

[Equation 1]

When the breadth of the distribution is defined by, the breadth of the distribution is 20% or less, more preferably 15% or less.

The average particle size and standard deviation are obtained from the particle size ri defined above.

In the present invention, when silver iodobromide is used as the silver halide, the content of the silver iodide is 4 mol% or more and 15 mol or more as an average silver iodide content in the entire silver halide grains. % Or less, more preferably 5 mol% or more and 12 mol% or less, and particularly preferably 6 mol% or more and 10 mol% or less.

The silver halide grains contained in the silver halide photographic emulsion are preferably so-called core / shell type grains in which silver iodide is concentrated.

The core / shell type particles are particles composed of a core that serves as a core and a shell that coats the core, and the shell is formed by one layer or more layers. The silver iodide contents of the core and the shell are preferably different from each other, and it is particularly preferable that the silver iodide contents of the core portions are maximized.

The silver iodide content of the above core is preferably 10 mol% or more, more preferably 20 mol% or more, and further preferably 25 mol% or more. The silver iodide content of the outermost shell of the above shells, that is, the shell which usually forms the outermost surface layer is preferably 5 mol% or less, more preferably 0 to 2 mol%. The proportion of the core is preferably 2 to 60% by volume of the entire particle, more preferably 5 to 50%.

The silver halide grains contained in the silver halide photographic emulsion are prepared by preliminarily containing an aqueous solution containing a protective colloid and seed grains in a reaction vessel, and supplying silver ions, halogen ions or silver halide fine particles as needed. It is obtained by crystal growth of seed particles. Here, the seed particles can be prepared by a single jet method or a controlled double jet method well known in the art. The halogen composition of the seed grains is arbitrary and may be any of silver bromide, silver iodide, silver chloride, silver iodobromide, silver chlorobromide, silver chloroiodide and silver chloroiodobromide. Silver bromide and silver iodobromide are preferred.

When seed grains are used to prepare a silver halide emulsion, the seed grains may have a regular crystal form such as a cube, octahedron or tetradecahedron, or may have a spherical or plate shape. It may have an irregular crystal form. In these grains, any ratio of {100} plane to {111} plane can be used. Further, those having a composite form of these crystal forms may be used, and particles of various crystal forms may be mixed, but use of monodisperse spherical seed particles described in the specification of Japanese Patent Application No. 2-408178. Is preferred.

The silver halide photographic emulsion can be produced by any of the acidic method, the neutral method and the ammonia method.

In the production of silver halide photographic emulsion,
The halide ion and the silver ion may be mixed at the same time, or the other may be mixed in the presence of either one. Also,
It may be grown by adding halide ions and silver ions successively or simultaneously while controlling the pH and pAg in the mixing vessel, while considering the critical growth rate of the silver halide crystal. The conversion method may be used to change the silver halide composition of the grains at any step of the silver halide formation. Further, halide ions and silver ions may be supplied as fine silver halide particles into the mixing vessel.

In the production of silver halide photographic emulsion,
A known silver halide solvent such as ammonia, thioether or thiourea can be present.

The silver halide grains contained in the silver halide photographic emulsion are cadmium salt, zinc salt, lead salt, thallium salt, iridium salt (including complex salt), in the process of forming and / or growing the grain. Rhodium salt (including complex salt)
And at least one selected from iron salts (including complex salts) can be used to add a metal ion so that these metal elements can be contained inside and / or on the surface of the particles, and the particles are placed in a suitable reducing atmosphere. By this, reduction sensitization nuclei can be imparted to the inside of the grain and / or the surface of the grain.

In the silver halide photographic emulsion, unnecessary soluble salts may be removed after the growth of silver halide grains is completed, or may be contained therein. When removing the salts, Research Disclosure (Research D
isclosure, hereinafter abbreviated as RD. ) It can be performed based on the method described in 17643, item II.

Conditions other than those mentioned above in the production of the silver halide photographic emulsion according to the present invention are described in JP-A-61-6643.
No. 61, No. 61-14630, No. 61-112142, No. 62-157024,
62-18556, 63-92942, 63-151618, 63-1634
The optimum conditions can be selected with reference to known methods such as No. 51, No. 63-220238 and No. 63-311244.

The silver halide emulsion can be subjected to physical ripening, chemical ripening and spectral sensitization. Additives used in such processes are RD No.17643, No.18716 and N.
o.308119 (hereinafter RD17643, RD18716 and RD3081 respectively
Abbreviated as 19. )It is described in. The description is shown below.

[Item] [RD308119] [RD17643] [RD18716] Chemical sensitizer, page 996, section III-A, page 23, page 648, spectral sensitizer, page 996, IV-A, B, C, D, I, J, section 23 Page 24 page 648-9 Supersensitizer page 996 IV-AE, J section 23-24 page 648-9 page Fogging agent page 998 VI page 24-25 page 649 stabilizer 998 page VI page 24-25 page 649 Page When the photographic light-sensitive material of the present invention is a color photographic light-sensitive material, photographic additives that can be used are described in the above RD. The following shows the relevant locations.

[Item] [RD308119] [RD17643] [RD18716] Color turbidity inhibitor page 1002 VII-I section 25 page 650 Dye image stabilizer page 1001 VII-J section 25 whitening agent 998 page V 24 page UV light Absorber page 1003 VIII-C, XIII-C page 25 to 26 Light absorber page 1003 VIII page 25 to 26 Light scattering agent page 1003 VIII Filter dye page 1003 VIII page 25 to 26 binder 1003 page IX 26 page 651 static Inhibitor 1006 page XIII 27 page 650 Hardener 1004 page X 26 page 651 Plasticizer 1006 page XII 27 page 650 Lubricant 1006 page XII 27 page 650 Activator / coating aid 1005 page XI 26-27 Page 650 matting agent page 1007 page XVI developer (included in light-sensitive material) page 1011 XX-B When the photographic light-sensitive material of the present invention is a color photographic light-sensitive material, various couplers can be used. Examples are given below in RD17643 and RD308119. The relevant description is shown below.

[Items] [RD308119] [RD17643] Yellow coupler page 1001 VII-D section 25 page VII-C to G magenta coupler page 1001 VII-D section 25 page VII-C to G cyan coupler page 1001 VII- Item D Page 25 Items VII-C to G Colored Coupler Page 1002 Item VII-G Item 25 Page VII-G Item DIR Coupler Page 1001 Item VII-F Item 25 Page VII-F BAR Coupler Page 1002 Item VII-F Other useful residue Group-releasing coupler page 1001 VII-F Alkali-soluble coupler page 1001 VII-E Further, these additives can be added to the photographic photosensitive layer by the dispersion method described in RD308119 page 1007, item XIV.

For the color photographic light-sensitive material, the above-mentioned RD308119
An auxiliary layer such as a filter layer or an intermediate layer described in the section VII-K can be provided.

When the color photographic light-sensitive material is constituted, various layer constitutions such as the forward layer, the reverse layer and the unit constitution described in the above RD308119 VII-K can be adopted.

In order to firmly adhere these photographic constituent layers (eg, photosensitive silver halide emulsion layer, intermediate layer, filter layer, magnetic recording layer, conductive layer) to the support, an undercoat layer is provided on the support. It may be provided, or the support may be treated with a chemical,
Mechanical treatment, corona discharge treatment, flame treatment, ultraviolet treatment,
Surface activation treatment such as high frequency treatment, glow discharge treatment, active plasma treatment, laser treatment, concentrated acid treatment, ozone oxidation treatment may be performed. Further, an undercoat layer may be provided after the surface activation treatment, and a photographic emulsion layer may be coated thereon.

To develop the silver halide photographic light-sensitive material of the present invention, for example, T.W. H. James, Theory of the Photographic Process 4th Edition (Th
e Theory of The Photografic Process Forth Editio
n) Pages 291 to 334 and the Journal of the American Chemical Society (Journal of the Ameri
can Chemical Society) Vol. 73, page 3,100 (1951), known per se can be used. In addition, the color photographic light-sensitive material is RD17643 described above.
Development can be carried out by a usual method described on pages 28 to 29, RD18716 page 615 and RD308119 XIX.

[0165]

EXAMPLES Specific examples of the present invention will be described below.
The embodiments of the present invention are not limited to these.

Example 1 <Preparation of Support> TAC: Commercially available cellulose triacetate film (film thickness: 110 μm) As a polyester resin for a support, S-1: Commercially available polyethylene terephthalate (intrinsic viscosity)
0.65, film thickness 90 μm) S-2: To 100 parts by weight of dimethyl terephthalate and 64 parts by weight of ethylene glycol, 0.1 part by weight of hydrate of calcium acetate as an ester exchange catalyst was added, and transesterification reaction was carried out by a conventional method. 5-sodium sulfo-di (β-hydroxyethyl) isophthalic acid (abbreviation: S
IP) ethylene glycol solution (concentration 35% by weight) 28 parts by weight (5 mol% / total ester bond), polyethylene glycol (abbreviation: PEG) (number average molecular weight: 4,000) 11 parts by weight (8.5% by weight / reaction product) Total weight), antimony trioxide 0.05 part by weight, phosphoric acid trimethyl ester 0.13 part by weight, Irganox 1010 (CIBA-GEIGY as an antioxidant
(Made by the company) was added so that it might be 1 weight% with respect to the product polymer. Then gradually raise the temperature and reduce the pressure to 280 ° C, 0.5 mm
Polymerization was carried out with Hg to obtain a copolyester. (Intrinsic viscosity 0.65, film thickness 90 μm) S-3: S-1 and S-2 were each vacuum dried at 150 ° C, and then two of the three extruders were used for S-2 and melted at 285 ° C. The thickness ratio of the three layers extruded is S-2: S-1: S-2.
= 1: 1: 1, the layers were joined in a T-die, and were rapidly solidified on a cooling drum to obtain a laminated unstretched film. At this time, the thickness of each layer was controlled by adjusting the extrusion amount of each material. Then, after longitudinal stretching (3.4 times) at 85 ° C., transverse stretching (3.4 times) at a temperature of 95 ° C., and heat setting at 210 ° C., a biaxially stretched film having a thickness of 90 μ was obtained.

The film thickness ratio of S-4: 3 layers is S-2: S-1:
It was created by the same method as S-3 except that S-2 = 1: 2: 3.

<Method of giving width curl to film>
One side of the film was impregnated with a mixed solvent of phenol / acetone (ratio 1: 1) with a wire bar. Then about
Treat at 100 ℃ for 10 minutes, then from each Tg to 10 ℃
It heat-treated below for 20 minutes and cooled. At this time, a film having a desired width curl can be obtained by appropriately selecting the wire bar.

Next, a method of measuring the curl degree in the width direction of the support will be described.

After forming a support and imparting a curl to the width, the support is cut into 2 mm in the lengthwise direction and 35 mm in the widthwise direction (widthwise direction) at the time of production, and the conditions are 23 ° C. and 55% RH. In 1
After humidity control over days, the curl degree in the width direction is measured.

The curl degree is represented by 1 / r (m ^-1 ). This r represents the radius of curvature of the curled support, and its unit is m (meter).

<Preparation of Photosensitive Material> The support thus prepared was given a desired width curl and subjected to an undercoating process as described below to provide a back layer and an emulsion layer. The width curl value applied to the support is described in Table 1 below.

Both sides of the support were subjected to a corona discharge treatment of 8 W / (m ² · min), and one side of the support was coated with the undercoat coating solution B.
-1 is applied to a dry film thickness of 0.8 μm to form an undercoat layer B-
1 is formed on the other surface of the support.
-2 is applied to a dry film thickness of 0.8 μm to form an undercoat layer B-
Formed 2. However, for S-4, the undercoating coating solution B-1 was applied to the outer thin layer of the copolyester layer to give a dry film thickness of 0.1.
The subbing layer B-1 is formed by coating so as to have a thickness of 8 μm, and the subbing coating solution B-2 below is dried on the other surface of the support to give a dry film thickness of 0.
The undercoat layer B-2 was formed by coating so as to have a thickness of 8 μm.

<Undercoating liquid B-1> Copolymer latex liquid (solid content: 30% by weight, t-butyl acrylate 20% by weight, styrene 25% by weight, and 2-hydroxyethyl acrylate 25% by weight). 30%) 270g Compound (UL-1) 0.6g Hexamethylene-1,6-bis (ethyleneurea) 0.8g Finish with water 1000ml <Undercoating liquid B-2> 40% by weight butyl acrylate, 20% by weight styrene And 40% by weight glycidyl acrylate copolymer latex liquid (solid content 30%) 270 g Compound (UL-1) 0.6 g Hexamethylene-1,6-bis (ethyleneurea) 0.8 g Finish with water 1000 ml 8 W / on layer B-1 and subbing layer B-2
A corona discharge of (m ² · min) is applied, and the following coating solution B-3 is applied on the undercoat layer B-1 to a dry film thickness of 0.1 μm to form an undercoat layer B-3. Then, on the undercoat layer B-2,
The following coating liquids B-5, 6 or 7 were coated so as to have a dry film thickness of 1.0 μm to form an undercoat layer B-5, 6 or B-7 having an antistatic function.

<Coating Liquid B-3> Gelatin 10 g Compound (UL-1) 0.2 g Compound (UL-2) 0.2 g Compound (UL-3) 0.1 g Silica particles (average particle size: 3 μm) 0.1 g Finish with water 1000 ml <Coating liquid B-5> Conductive polymer P-4 or P-5 of the present invention 60 g Latex liquid containing compound (UL-5) as a component (solid content 20%) 80 g Ammonium sulfate 0.5 g Curing agent (UL- 6) 12 g Polyethylene glycol (weight average molecular weight 600) 6 g Finish with water 1000 ml <Coating liquid B-6> Conductive polymer P-11 or P-14 of the present invention 30 g Water 10 ml Glycerin 30 ml Methanol 620 ml Acetone 350 ml <Coating liquid B-6 -7> 10 g of SnO ₂ / Sb (9/1 weight ratio, average particle size 0.25 μ) of the present invention or SnO ₂ sol solution (prepared by Synthesis Method 1) 300 ml gelatin 10 g sodium dodecylbenzenesulfonate 0.3 g Dihexyl-α-sulfone succinate sodium salt 1.2 g Finished with water 1000 ml The synthesis method of the above SnO ₂ sol solution is as follows.

(Tin oxide solution (SnO ₂ sol solution), synthesis method 1) 65 g of stannic chloride hydrate in a water / ethanol mixed solution
It was dissolved in 2000 cc to obtain a uniform solution. Then, this was boiled to obtain a coprecipitate. The formed precipitate is taken out by decantation, and the precipitate is washed with distilled water many times. Silver nitrate is dropped into distilled water after washing the precipitate, and after confirming that there is no reaction of chloride ions, 1000 cc of distilled water is added to bring the total volume to 2000 cc. Further, 40 cc of 30% aqueous ammonia was added and heated in water to obtain a colloidal gel dispersion. This colloidal gel dispersion is used as a dispersion.

Furthermore, 8 is formed on the undercoat layer B-5 or 6 or 7.
W / (m ² · min) corona discharge is applied and the following coating liquid MC
-1 was applied so as to have a dry film thickness of 1.5 μm.

If necessary, the subbing coating solution B-2 can be provided as an adhesive layer on the layer adjacent to MC-1 within a range not impairing the effects of the present invention.

<MC-1> The following components were mixed together by a dissolver and then dispersed by a sand mill to obtain a dispersion liquid.

Nitrocellulose 35 parts by weight Polyurethane resin 35 parts by weight Lauric acid 1 part by weight Oleic acid 1 part by weight Butyl stearate 1 part by weight Cyclohexanone 75 parts by weight Methyl ethyl ketone 150 parts by weight Toluene 150 parts by weight Co Coated γ-Fe ₂ O ₃ (Long axis 0.2 μm, short axis 0.02 μm, Hc = 650 oersted) 5 parts by weight Further, the following coating solution OC-1 was applied on the MC-1 coating layer.
It was applied at 10 ml / m ² .

<OC-1> Carnauba wax 1 g Toluene 700 ml Methyl ethyl ketone 300 ml Further, 25 W / (m ² · m ²⁾ on the undercoat layer B-3 or B-4.
min) corona discharge was applied, and the following photographic constituent layers were sequentially formed to prepare a multilayer color photographic light-sensitive material.

Unless otherwise specified, the quantities shown in the photographic constituent layers shown below are expressed in quantities per 1 m ² .

Further, silver halide and colloidal silver are shown in terms of silver.

<Photographic Constituent Layer> First layer; antihalation layer (HC) Black colloidal silver 0.15 g UV absorber (UV-1) 0.20 g Colored cyan coupler (CC-1) 0.02 g High boiling point solvent (Oil-1) ) 0.20 g High boiling point solvent (Oil-2) 0.20 g Gelatin 1.6 g Second layer; Intermediate layer (IL-1) Gelatin 1.3 g Third layer; Low sensitivity red-sensitive emulsion layer (RL) Silver iodobromide emulsion (Average particle size 0.3 μm) (Average iodine content 2.0 mol%) 0.4 g Silver iodobromide emulsion (Average particle size 0.4 μm) (Average iodine content 8.0 mol%) 0.3 g Sensitizing dye (S-1) 3.2 × 10 ^-4 (mol / silver 1 mol) Sensitizing dye (S-2) 3.2 × 10 ^-4 (mol / silver 1 mol) Sensitizing dye (S-3) 3.2 × 10 ^-4 (mol / silver 1 mol) ) Cyan coupler (C-1) 0.50 g Cyan coupler (C-2) 0.13 g Colored cyan coupler (CC-1) 0.07 g DIR compound (D -1) 0.006 g DIR compound (D-2) 0.01 g High boiling point solvent (Oil-1) 0.55 g Gelatin 1.0 g Fourth layer; high-sensitivity red-sensitive emulsion layer (RH) Silver iodobromide emulsion (average grain) Diameter 0.7 μm) (Average iodine content 7.5 mol%) 0.9 g Sensitizing dye (S-1) 1.7 × 10 ⁻⁴ (mol / silver 1 mol) Sensitizing dye (S-2) 1.6 × 10 ⁻⁴ (mol / Silver 1 mol) Sensitizing dye (S-3) 0.1 × 10 ^-4 (mol / silver 1 mol) Cyan coupler (C-2) 0.23 g Colored cyan coupler (CC-1) 0.03 g DIR compound (D-2) ) 0.02 g High boiling point solvent (Oil-1) 0.25 g Gelatin 1.0 g Fifth layer; Intermediate layer (IL-2) Gelatin 0.8 g Sixth layer; Low sensitivity green sensitive emulsion layer (GL) Silver iodobromide emulsion (Average particle size 0.4 μm) (Average iodine content 8.0 mol%) 0.6 g Silver iodobromide emulsion (Average particle size 0.3 μm) (Average iodine content 2.0 mol%) 0.2 g Sensitizing dye (S-4) 6.7 × 10 ^-4 (mol / silver 1 mol) Sensitizing dye (S-5) 0.8 × 10 ^-4 (mol / silver 1 mol) Magenta coupler (M-1) 0.17 g Magenta coupler (M-2) 0.43 g Colored magenta coupler (CM-1) 0.10 g DIR compound (D-3) 0.02 g High boiling point solvent (Oil-2) 0.7 g Gelatin 1.0 g Seventh layer; high sensitivity green sensitive emulsion layer (GH) Silver iodobromide emulsion ( Average particle size 0.7 μm (average iodine content 7.5 mol%) 0.9 g Sensitizing dye (S-6) 1.1 × 10 ⁻⁴ (mol / silver 1 mol) Sensitizing dye (S-7) 2.0 × 10 ⁻⁴ (Mol / silver 1 mol) Sensitizing dye (S-8) 0.3 × 10 ^-4 (mol / silver 1 mol) Magenta coupler (M-1) 0.30 g Magenta coupler (M-2) 0.13 g Colored magenta coupler (CM) -1) 0.04 g DIR compound (D-3) 0.004 g High boiling point solvent (Oil-2) 0.35 g Gelatin 1.0 g Eighth layer; Yellow filter layer (Y ) Yellow colloidal silver 0.1 g Additive (HS-1) 0.07 g Additive (HS-2) 0.07 g Additive (SC-1) 0.12 g High boiling point solvent (Oil-2) 0.15 g Gelatin 1.0 g 9th layer; Low sensitivity blue-sensitive emulsion layer (BL) Silver iodobromide emulsion (average grain size 0.3 µm) (average iodine content 2.0 mol%) 0.25 g Silver iodobromide emulsion (average grain size 0.4 µm) (Average iodine content) Amount 8.0 mol%) 0.25 g Sensitizing dye (S-9) 5.8 x 10 ^-4 (mol / silver 1 mol) Yellow coupler (Y-1) 0.6 g Yellow coupler (Y-2) 0.32 g DIR compound (D- 1) 0.003 g DIR compound (D-2) 0.006 g High boiling point solvent (Oil-2) 0.18 g Gelatin 1.3 g 10th layer; High-sensitivity blue-sensitive emulsion layer (B-H) Silver iodobromide emulsion (average grain size) 0.8 [mu] m) (average iodide content of 8.5 mol%) 0.5 g sensitizing dye (S-10) 3 × 10 -4 ( mol / mole of silver) sensitizing dye (S-11) 1.2 × 10 -4 ( Mo / Silver 1 mol) Yellow coupler (Y-1) 0.18 g Yellow coupler (Y-2) 0.10 g High boiling point solvent (Oil-2) 0.05 g Gelatin 1.0 g 11th layer; 1st protective layer (PRO-1) Iodine Silver bromide (average particle size 0.08 μm) 0.3 g Ultraviolet absorber (UV-1) 0.07 g Ultraviolet absorber (UV-2) 0.10 g Additive (HS-1) 0.2 g Additive (HS-2) 0.1 g High boiling solvent (Oil-1) 0.07g High boiling solvent (Oil-3) 0.07g Gelatin 0.8g 12th layer; 2nd protective layer (PRP-2) Compound A 0.04g Compound B 0.004g Polymethylmethacrylate (average particle Diameter 3 μm) 0.02 g Copolymer of methylmethacrylate: ethylmethacrylate: methacrylic acid = 3: 3: 4 (weight ratio) 0.13 g Gelatin 0.7 g-Preparation of silver iodobromide emulsion- The silver iodobromide emulsion used in the 10th layer was prepared by the following method.

A silver iodobromide emulsion was prepared by the double jet method using monodisperse silver iodobromide grains having an average grain size of 0.33 μm (silver iodobromide content of 2 mol%) as seed crystals.

A solution (G-1) having the following composition was treated at a temperature of 70 ° C. and pA.
While maintaining g7.8 and pH 7.0, a seed emulsion corresponding to 0.34 mol was added while stirring well.

(Formation of Internal High Iodity Phase-Core Phase) After that, a solution (H-1) having the following composition and a solution (S-
1) and 1) were added over 86 minutes at an accelerated flow rate (the flow rate at the end was 3.6 times the initial flow rate) while maintaining a flow rate ratio of 1: 1.

(Formation of External High Iodity Phase-Shell Phase) Subsequently, while maintaining the pH at Ag10.1 and the pH at 6.0, (H-2) and (S
-2) and were added at a flow rate accelerated by a flow rate ratio of 1: 1 (the flow rate at the end was 5.2 times the initial flow rate) over 65 minutes.

The pAg and pH during grain formation were controlled using an aqueous potassium bromide solution and a 56% aqueous acetic acid solution. After the particles are formed, they are washed with water by a conventional flocculation method, and then gelatin is added to redisperse them, and the pH is adjusted to 40 ° C.
And pAg were adjusted to 5.8 and 8.0, respectively.

The obtained emulsion was a monodisperse emulsion containing octahedral silver iodobromide grains having an average grain size of 0.80 μm, a dispersion width of 12.4% and a silver iodide content of 8.5 mol%.

<G-1> Solution Ocein gelatin 100.0 g 10% by weight solution of -1 of the following compound in ethanol 25.0 ml 28% aqueous ammonia solution 440.0 ml 56% acetic acid aqueous solution 660.0 ml Finish with water 5000.0 ml Compound-1: polyiso Propyleneoxy / polyethyleneoxy / sodium succinate <H-1> solution Oscein gelatin 82.4g Potassium bromide 151.6g Potassium iodide 90.6g Finish with water 1030.5ml <S-1> solution Silver nitrate 309.2g 28% ammonia solution Equivalent Finish with water 1030.5 ml <H-2> solution Ocein gelatin 302.1 g Potassium bromide 770.0 g Potassium iodide 33.2 g Finish with water 3776.8 ml <S-2> solution Silver nitrate 1133.0 g 28% ammonia solution equivalent Finish with water 3776.8 Used other than the 10th layer For the silver iodobromide emulsion, the average grain size of seed crystal, temperature, pAg, pH, flow rate,
The emulsions having different average grain sizes and silver iodobromide contents were prepared by changing the addition time and the halide composition.

All were core / shell type monodisperse emulsions having a distribution width of 20% or less. Each emulsion was subjected to optimum chemical ripening in the presence of sodium thiosulfate, chloroauric acid and ammonium thiocyanate to obtain a sensitizing dye, 4-hydroxy-6-methyl-1.3,3a, 7-tetrazaindene, 1- Phenyl-5-mercaptotetrazole was added.

The above-mentioned light-sensitive material further comprises the compound SU.
-1, SU-2, viscosity adjusting agent, hardener H-1, H-2,
Stabilizer ST-1, antifoggant AF-1, AF-2 (weight average molecular weight of 10,000 and 1,100,000), dyes AI-1, AI-2 and compound DI-1 (9.4 mg / m ² ).
Contains.

(The structure of each compound used for sample preparation is shown below.)

[0195]

[Chemical 6]

[0196]

[Chemical 7]

[0197]

[Chemical 8]

[0198]

[Chemical 9]

[0199]

[Chemical 10]

[0200]

[Chemical 11]

[0201]

[Chemical 12]

[0202]

[Chemical 13]

[0203]

[Chemical 14]

[0204]

[Chemical 15]

[0205]

[Chemical 16]

[0206]

[Chemical 17]

The reproduction output error, the perforation strength, and the curl recovery property of each of the samples prepared as described above were examined.

Each measuring method will be described below.

Each of the prepared samples was cut as shown in FIG. 1 and packed in a cartridge to prepare a film having a width of 35 mm and 24 shots. This was loaded into a photographic camera with a magnetic head described in US Pat. No. 5,021,820, and signals were written on tracks C0 to C3 by the signal input method described in the specification.

In FIG. 1, 101 is perforation, and F00 to F29 are tracks for recording magnetic information like tracks C0 to C3.

This film was subjected to the development processing shown below, and then subjected to a magnetic recording / reproducing apparatus to examine a reproduction output error. The reproduction output error means that the average reproduction output per track is free of electrostatic noise and is 70% or less of the reproduction output when the magnetic head accurately contacts the film.

<Development Processing> 1. Color development 3 minutes 15 seconds 38.0 ± 0.1 ℃ 2. Bleach 6 minutes 30 seconds 38.0 ± 3.0 ℃ 3. Washing with water 3 minutes 15 seconds 24-41 ° C 4. Settling 6 minutes 30 seconds 38.0 ± 3.0 ° C 5. Washing with water 3 minutes 15 seconds 24-41 ° C 6. Stability 3 minutes 15 seconds 38.0 ± 3.0 ℃ 7. Drying 50 ° C or less The composition of the treatment liquid used in each step is shown below.

<Color developer> 4-amino-3-methyl-N-ethyl-N- (β-hydroxyethyl) aniline / sulfate 4.75 g anhydrous sodium sulfite 4.25 g hydroxylamine 1/2 sulfate 2.0 g anhydrous Potassium carbonate 37.5 g Sodium bromide 1.3 g Nitrilotriacetic acid sodium salt (monohydrate) 2.5 g Potassium hydroxide 1.0 g Add water to make 1 liter (pH = 10.1) <bleaching solution> Ethylenediaminetetraacetic acid iron (III ) Ammonium salt 100.0 g Ethylenediaminetetraacetic acid diammonium salt 10.0 g Ammonium bromide 150.0 g Glacial acetic acid 10.0 g Water is added to make 1 liter, and the pH is adjusted to 6.0 with ammonia water.

<Fixer> Ammonium thiosulfate 175.0 g Anhydrous sodium sulfite 8.5 g Sodium metasulfite 2.3 g Water is added to make 1 liter, and pH is adjusted to 6.0 with acetic acid.

<Stabilizer> Formalin (37% aqueous solution) 1.5 ml Conidax (manufactured by Konica Corporation) 7.5 ml Water is added to make 1 liter.

20 samples were tested for each sample, the reproduction output of all 24 frames was examined, and the number of films in which a reproduction output error occurred was counted.

The test environment in which the signal was written in the camera was 25 ° C. and 50% RH. Also, playback is 23
It was carried out at ℃ and 20% RH.

The sample used for the measurement of the perforation strength was JIS K7519-based on the obtained photographic light-sensitive material.
Perforated as described in 1982.

Orientec Tensilon RTA-1
At 00, the end portion 3 of the perforation strength measuring jig shown in FIG. 2 is grasped by a tensilon chuck. A perforation part of a film having a length of 250 mm is fitted into the sprocket 1, the film is passed through, and a 100 g weight is hung on the film end part 2. The other end 4 of the film was gripped by a chuck and pulled at a speed of 40 mm / min, and the maximum load when the perforation part broke was defined as the perforation strength.

<Rewind property> Sample size 12 cm x
A 35 mm film is wound on a core having a diameter of 10 mm so that the emulsion surface is inwardly wound, and treated for 3 days under the conditions of 55 ° C. and 20% RH to give a curl. Then release from the core and put in pure water at 38 ℃.
After soaking for 5 minutes, apply a load of 50g and dry with a hot air dryer at 55 ℃.
Dry for minutes. The load was removed, the sample was hung vertically, the distance between both ends of the sample was determined, and it was evaluated how much the original distance was restored to 12 cm. The evaluation was performed according to the following criteria.

◎: 70% or more ○: 60% or more and less than 70% △: 50% or more and less than 60% ×: less than 50% Incidentally, if it is Δ level or more, there is no problem in practical use.

The results are shown in Table 1.

[0223]

[Table 1]

From Table 1, when the polyester support having a width curl of 5 to 30 m ^{-1 according} to the present invention is used, the halogen having a magnetic recording layer which is excellent in both perforation strength and curl recovery and has no error. It turns out that a silver halide photographic light-sensitive material can be obtained.

Example 2 <Preparation of Support> In the same manner as in Example 1, supports S-3 and S-4 having a thickness of 90 μm were prepared and a width curl of 15 m ⁻¹ was applied.

<Preparation of Light-Sensitive Material> On the supports S-3 and S-4 thus prepared, the undercoat layer B-2, the conductive layer B-5 and MC were formed on the back layer side in the same manner as in Example 1. -1 and OC-1
Was coated so as to have a desired film thickness.

On the other surface of the support, an undercoat layer B-1,
And B-3 were applied, and a photographic constituent layer was further formed.

The dust adhesion is visually observed on the print after printing 24 frames each of each sample at 23 ° C. and 20% RH on one randomly selected film after development processing. The number of garbage was measured.

<Film Forming Test> After immersing the sample in the developer for color photographic light-sensitive materials, which was controlled at 38 ° C., for 3 minutes, the back layer surface of the sample was scratched in a grid pattern with a sharp tip. Then, the surface was rubbed, and the residual rate of the back layer film was evaluated according to the following criteria.

A: Less than 1% B: 1% or more and less than 10% C: 10% or more and less than 20% D: 20% or more and less than 50% E: 50% or more and less than 100% Practically problematic if the rank is A to C There is no level.

A film-attaching property test was performed on the obtained sample. Further, each sample was subjected to a developing treatment in the same manner as in Example 1 to examine the number of reproduction output error occurrences, dust adhesion and curl recovery. The results are shown in Table 2.

[0232]

[Table 2]

Example 3 <Preparation of Support> In the same manner as in Example 1, the support S-1 was prepared.
(Film thickness 90 μm, elastic modulus 575 kg / mm ² ), S-3 (film thickness 90 μm
m, elastic modulus 450 kg / mm ² ) was created. Further, a support S-5 shown below was prepared.

100 parts by weight of commercially available polyethylene-2,6-naphthalate polymer and Tinuvin P.326 as an ultraviolet absorber.
After drying 2 parts by weight (manufactured by Geigy) by a conventional method, 30
After melting at 0 ℃, extruded from T-die and longitudinally stretched 3.3 times at 140 ℃, then transversely stretched 3.3 times at 130 ℃ and heat set at 250 ℃ for 6 seconds, thickness 90, 80, 70μm. I got a film of.

<Preparation of Photosensitive Material> A wide curl was applied to the prepared support in the same manner as in Example 1 and further subjected to an undercoating process to provide a back layer and an emulsion layer. Further, after providing the back layer and before applying the emulsion layer, heat treatment was performed under each condition. All the heat treatments were carried out with the core having a diameter of 30 cm and the undercoat surface wound outside. The value of the width curl applied to the support and the heat treatment conditions are shown in Table 3 below. The reproduction output, the number of errors, the dust adhesion, the perforation strength, and the curl recovery were examined for the obtained samples. The results are shown in Table 3.

[0236]

[Table 3]

From Table 3, it can be seen that S-5 has an excellent perforation strength, although the dust adhesion is slightly inferior.

Example 4 <Preparation of Support> Support S-3 was prepared in the same manner as in Example 1.
(Thickness 90, 80, 70 μm) was created. However, the film thickness was adjusted by the extrusion amount of each material.

Supports S-1, S-5 having a film thickness of 90, 80, 70 μm were prepared. For comparison, TAC (film thickness 110 μm) was also prepared as in Example 1.

<Preparation of Photosensitive Material> In the same manner as in Example 1, a width curl of 15 (l / m) was applied to each support, and further subbing processing was performed to provide a back layer and an emulsion layer. It was

For the obtained sample, a reproduction output error,
The perforation strength was measured.

The results are shown in Table 4.

[0243]

[Table 4]

From Table 4, supports S-1, S-3, S-5
Even if the film thickness is reduced to 70 μm, the TAC film thickness is 110 μm.
It can be seen that it has a perforation strength equal to or higher than that of m.

[0245]

First of all, it has sufficient mechanical strength,
Adhesion between the magnetic recording layer and the magnetic head is sufficiently maintained even if environmental conditions change, errors occurring during magnetic signal input and reproduction are reduced, and magnetic recording reliability is improved. A silver halide photographic light-sensitive material having a recording layer can be provided.

The present invention can secondly provide a silver halide photographic light-sensitive material having a magnetic recording layer in which the chargeability of the photographic light-sensitive material is reduced.

Thirdly, it is possible to provide a silver halide photographic light-sensitive material having a magnetic recording layer having excellent transparency and good adhesion.

[Brief description of drawings]

FIG. 1 is a plan view of a photosensitive material of the present invention.

FIG. 2 is a perspective view showing a schematic configuration of a testing machine used for measuring the perforation strength of the light-sensitive material of the present invention.

[Explanation of symbols]

 1 Sprocket part 2 Film end part 3 Tester end part (chuck grip part) 4 Film end part (chuck grip part) 101 Perforation C0 to C3 track (record magnetic information) F00 to F29 track (record magnetic information)

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display area // B32B 27/36 7421-4F

Claims (5)

[Claims] 1. A silver halide photographic light-sensitive material using a photographic support comprising a polyester having a degree of curl in the width direction of 5 to 30 m ^-1 , which has a photographic constituent layer on one side and a thickness of 7 μm or less on the other side. A silver halide photographic light-sensitive material having a back layer, having at least one conductive layer in the back layer, and having a magnetic recording layer outside the support from the conductive layer. 2. A polyester layer containing, as a copolymerization component, an aromatic dicarboxylic acid having a metal sulfonate group, and / or
2. The silver halide photographic light-sensitive material according to claim 1, wherein a photographic support containing a polyalkylene glycol and / or a saturated aliphatic dicarboxylic acid is used. 3. A laminate of two or more types of polyesters different from each other, and any one or more types of polyester layers of different types of polyesters are used as a copolymerization component, and / or an aromatic dicarboxylic acid having a metal sulfonate group. The silver halide photographic light-sensitive material according to claim 1, wherein a photographic support containing a polyalkylene glycol and / or a saturated aliphatic dicarboxylic acid is used. 4. A photographic support comprising a laminate of two or more layers of two or more different polyesters and having asymmetrical laminate structures on both sides of a center of a thickness dividing position. A silver halide photographic light-sensitive material according to claim 1. 5. The silver halide photographic light-sensitive material according to claim 1, wherein the photographic support made of polyester is made of a polyester containing naphthalenedicarboxylic acid and ethylene glycol as main components.