JPH07134350A - Silver halide photographic sensitive material - Google Patents

Abstract

PURPOSE:To obtain a photographic sensitive material excellent in drying property, capable of reducing the amt. of processing soln. to be replenished, maintaining curling preventiveness and with the small dimensional change due to processing by providing the material with a back face coating layer excellent in water resistance. CONSTITUTION:One side of a substrate is coated with at least one silver halide emulsion layer with a hydrophilic colloid as a binder, the side of the substrate opposite to the side coated with the emulsion layer is coated with a non- photosensitive hydrophilic colloid layer with a hydrophilic colloid as the binder, and the outermost layer of the non-photosensitive colloid layer is coated with a hydrophobic polymer layer formed by filming from a latex to constitute the silver halide photographic sensitive material. In this case, the lowest film forming temp. of the latex forming the hydrophobic polymer layer is made lower than the glass transition temp. of the dried polymer by >=10 deg.C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silver halide photographic light-sensitive material, and more particularly to a silver halide photographic light-sensitive material having improved dryability after washing with water and excellent suitability for rapid processing.

[0002]

2. Description of the Related Art A silver halide photographic light-sensitive material generally comprises a support such as a plastic film, paper or paper coated with plastic, glass or the like with a light-sensitive emulsion layer and, if necessary, an intermediate layer, a protective layer, a back layer, By combining various constituent layers such as antihalation layer and antistatic layer,
It has been applied. In recent years, there has been a strong demand in the printing industry for work efficiency and speedup, and there is a wide-ranging need for faster scanning and shorter processing time of photosensitive materials. In order to meet these needs in the printing field, it is desired that exposure machines (scanners, plotters) have faster scanning speeds, and increase the number of lines and squeezing the beam for higher image quality. It is desired that the materials have high sensitivity, excellent stability, and rapid development processing. The rapid development process mentioned here is from the time when the leading edge of the film enters the automatic processor to the time when the film passes through the developing tank, crossover section, fixing tank, crossover section, washing tank and drying section and then comes out from the drying section. Is 15 to 60 seconds, and the line speed of the automatic processor is 1000 mm / min or more.

In order to shorten the development processing time, it is effective to improve the drying property of the silver halide photographic light-sensitive material to shorten the drying time. As a means for improving the drying property, there is a method of reducing the amount of binder in the silver halide photographic light-sensitive material, but this method has problems such as reduction in mechanical strength of the silver halide photographic light-sensitive material, blackening of scratches, and generation of roller marks. Cause Scratch blackening is a phenomenon in which, when handling a silver halide photographic light-sensitive material before development processing, when the film surface is rubbed, this portion is blackened in a scratched state after development processing. The roller mark is a phenomenon in which a fine unevenness of a roller applies a pressure to the silver halide photographic light-sensitive material during the automatic development processing of the silver halide photographic light-sensitive material, resulting in black-spotted uneven density. Both the blackening of the scratches and the roller mark significantly reduce the commercial value of the silver halide photographic light-sensitive material. In the case of a silver halide photographic light-sensitive material having a silver halide emulsion layer on one side of a support (hereinafter referred to as "single-sided photosensitive material"), the non-photosensitive hydrophilic colloid layer on the back surface is removed or By using a hydrophobic binder for the non-photosensitive layer on the surface, the drying property is improved.
However, the curling resistance of the silver halide photographic light-sensitive material is remarkably deteriorated by this method, and it cannot be put to practical use such as causing defective conveyance in an automatic conveying system.

On the other hand, in many fields from the viewpoint of environmental protection,
Resources, generated gas, wastewater, waste, etc. are being reviewed. In the field of photographic processing, the need to reduce the amount of replenishment of processing solution used for processing photosensitive materials is increasing from the viewpoints of resource saving, reduction of waste water amount, reduction of container used regardless of black and white and color development. ing. However, significantly developing speed reducing the replenishing amount of the developer becomes slow, and since the remarkable fixing speed reducing the replenishing amount of the fixing solution is slow, quite conventionally large amount (photosensitive material 1 m ² per developer 250 500 ml,
The fixer is replenished with 500 to 800 ml).
In order to increase the developing speed and the fixing speed, the processing temperature is raised and the stirring conditions during the processing are strengthened, but there are various problems such as the generation of odor and the increase of the apparatus cost. Thus, there has been a strong demand for a silver halide photographic light-sensitive material having suitability for rapid processing and capable of reducing the replenishing amount of the processing solution.

As a means for solving these problems, a hydrophilic colloid is used as a binder on the surface (back surface) opposite to the surface on which the silver halide emulsion layer is coated in JP-A-5-127282. In a silver halide photographic light-sensitive material having a non-photosensitive hydrophilic colloid layer, a hydrophobic polymer layer is provided at a position farther from a support than the non-photosensitive hydrophilic colloid layer, the non-photosensitive colloid layer and the hydrophobic polymer layer A silver halide photographic light-sensitive material which is substantially non-swelling upon processing has been proposed. However, it is often necessary to apply such a layer to obtain the desired performance.
It was necessary to apply a high temperature dry coating above 0 ° C.
For this reason, it is not always suitable and costly for coating and manufacturing with a usual silver halide photographic light-sensitive material manufacturing apparatus which uses gelatin as the main binder and utilizes its low temperature gelation. . Furthermore, when the hydrophobic polymer layer is coated on the non-photosensitive hydrophilic colloid layer on the back surface sequentially or simultaneously, depending on the latex of the hydrophobic polymer used, if the drying temperature of the polymer layer is low, poor film formation may result in cloudiness. In some cases, failures such as cracks or cracks occurred. Further, when the non-photosensitive hydrophilic colloid layer and the hydrophobic polymer layer are simultaneously multilayer coated, a certain amount of the hydrophilic colloid is diffused and mixed into the hydrophobic polymer layer, which may reduce the water resistance, and improvement is desired. It was rare.

[0006]

Therefore, the first object of the present invention is that the drying property after washing with water is good and the curl is small,
Further, it is to provide a silver halide photographic light-sensitive material having good transportability. A second object of the present invention is to provide a silver halide photographic light-sensitive material having suitability for rapid processing and reduced replenishment amount of processing solution. A third object of the present invention is to provide a silver halide photographic light-sensitive material as described above which has no coating failure.

[0007]

According to the present invention, one side of a support is coated with at least one silver halide emulsion layer having a hydrophilic colloid as a binder, and the silver halide emulsion layer of the support is A non-photosensitive hydrophilic colloid layer using a hydrophilic colloid as a binder on the surface opposite to the coated surface,
In the silver halide photographic light-sensitive material in which the outermost layer of the non-photosensitive hydrophilic colloid layer is coated with a hydrophobic polymer layer formed from latex, the minimum film forming temperature of the latex forming the hydrophobic polymer layer ( MFT: Minimum Film-f
orming temperature) is 10 ° C. or more lower than the glass transition temperature of the polymer after drying, which is a silver halide photographic light-sensitive material.

First, the non-photosensitive hydrophilic colloid layer on the opposite side coated with the emulsion layer of the present invention (hereinafter referred to as "back layer").
That)). The back layer of the present invention is a layer using a hydrophilic colloid as a binder. As the hydrophilic colloid used for the back layer, a photographic layer on the side coated with a silver halide emulsion layer from the viewpoint of preventing curling. Those having a moisture absorption rate and a moisture absorption rate close to those of the binder are preferable. The most preferable hydrophilic colloid used for the binder of the back layer of the present invention is gelatin. As gelatin, so-called lime-processed gelatin, acid-processed gelatin, enzyme-processed gelatin, gelatin derivatives, modified gelatin, and the like commonly used in the art can be used. Among these gelatins, lime-processed gelatin and acid-processed gelatin are most preferably used.

As hydrophilic colloids other than gelatin, colloidal albumin, proteins such as casein, agar, sugar alginates, sugar derivatives such as starch derivatives, cellulose compounds such as carboxymethyl cellulose and hydroxymethyl cellulose, polyvinyl alcohol, poly-N.
-Synthetic hydrophilic compounds such as vinylpyrrolidone and polyacrylamide can be cited. In the case of a synthetic hydrophilic compound, other components may be copolymerized, but if the amount of the hydrophobic copolymerization component is too large, the moisture absorption amount and moisture absorption rate of the back layer become small, which is unsuitable from the viewpoint of preventing curling. Is. These hydrophilic colloids may be used alone or in combination of two or more.

In the back layer of the present invention, other than the binder,
A photographic additive such as a matting agent, a surfactant, a dye, a cross-linking agent, a thickener, an antiseptic, a UV absorber, and inorganic fine particles such as colloidal silica may be added. Regarding these additives, for example, the description of Research Disclosure Vol. 176, Item 17643 (December 1978) can be referred to. A polymer latex may be further added to the back layer of the present invention. The polymer latex used in the present invention is an aqueous dispersion of a water-insoluble polymer having an average particle size of 20 μm to 200 μm, and the preferable amount thereof is 0.01 to 1.0 in terms of dry weight ratio with respect to 1.0 of the binder, and particularly preferable. Is 0.1 to 0.
8 Preferable examples of the polymer latex used in the present invention have acrylic acid alkyl ester, hydroxyalkyl ester or glycidyl ester, or methacrylic acid alkyl ester, hydroxyalkyl ester or glycidyl ester as a monomer unit and have an average molecular weight of 10 More than 10,000, particularly preferably 300,000 to 500,000 polymers are mentioned.

The back layer of the present invention may be a single layer or two or more layers. The thickness of the back layer of the present invention is not particularly limited, and it depends on the type of the photographic light-sensitive material to be applied, but from the viewpoint of preventing curling, it is made equal to or close to the thickness on the side of the photosensitive silver halide emulsion layer. Desirably, generally 0.2μ ~ 20μ, especially 0.5μ ~
10μ is preferable. When the back layer is composed of two or more layers, the sum of the thicknesses of all the back layers is the thickness of the back layer of the silver halide photographic light-sensitive material of the present invention. It is desirable that the back layer of the present invention is substantially water resistant by being coated with the hydrophobic polymer layer. "Substantially water resistant"
Means that the thickness of the back layer after being immersed in water at 25 ° C. for 1 minute is not more than 1.5 times the thickness of the back layer before being immersed, and preferably not more than 1.3 times. The method for applying the back layer of the present invention is not particularly limited. Conventionally known methods for coating a hydrophilic colloid layer of a silver halide photographic light-sensitive material can be used. For example, a dip coating method, an air knife coating method, a curtain coating method, a roller coating method, a wire bar coating method, a gravure coating method, or an extrusion coating method using a hopper described in US Pat. No. 2,681,294, or U.S. Patents 2,761,418 and 3,508,947
No. 2,761,791, the multilayer simultaneous coating method can be used.

Next, the hydrophobic polymer layer (polymer layer) of the present invention will be described. The polymer layer of the present invention is substantially water resistant. “Substantially water resistant” means that the thickness of the polymer layer after immersion in water at 25 ° C. for 1 minute is 1.2 times or less the thickness of the polymer layer before immersion, and preferably 1.
It is less than 1 time. In the present invention, when the back layer and the hydrophobic polymer layer are laminated, the total thickness of the back layer and the hydrophobic polymer layer after immersion in water at 25 ° C. for 1 minute is 1% of the total thickness before immersion. It is preferably 0.5 times or less, more preferably 1.3 times or less, and the increase in thickness (swelling thickness) after immersion in water is preferably 2 μm or less, more preferably 1 μm or less. In practice, the swelling thickness at the end of the development processing step is preferably 2 μm or less, more preferably 1 μm or less, but the development processing conditions vary depending on the type of photosensitive material, processing system and the like. However, in any case, unless the water resistance at 25 ° C. is obtained, the swelling thickness at the time of treatment cannot be kept small.

For the polymer layer of the present invention, it is preferable to use a polymer latex containing a hydrophobic polymer as water-dispersed particles. As the polymer latex used, polyacrylic acid ester or polymethacrylic acid ester, polyurethanes, polyvinylidene chloride, polystyrenes, polyolefins, polyvinyl chlorides, polyvinyl acetates, etc. are used. Copolymer latices in combination with are also used. Further, if necessary, two or more kinds of latex can be blended. It is recognized that the hydrophobic polymer layer preferably has a relatively high glass transition temperature (Tg) in order to be water resistant, that is, non-swelling in the treatment liquid, but if it is too high, film formation tends to be defective. . The latex used in the present invention has an MFT of 10 than the Tg of the polymer after drying.
Those which are lower than ℃ are preferred. MFT rather than polymer Tg
As a method of lowering the temperature, a method of mixing a water-miscible organic solvent having a boiling point of about 80 ° C. to 250 ° C., and a hydrophilic monomer such as acrylic acid or methacrylic acid are copolymerized at the time of latex synthesis to give a slight hydrophilic property. It can be carried out by a method, a method of slightly hydrolyzing the monomer component of the latex, or the like, but any method is not particularly limited.

The polymer Tg is 40% polymer latex.
It is dried at ℃ and measured by a differential scanning calorimeter. The Tg of the hydrophobic polymer of the present invention is preferably 15 ° C or higher, more preferably 20 ° C or higher. When two latexes are blended and two Tg's are measured, it is desirable to lower the MFT by 10 ° C. or more with respect to the closer one. One method of lowering the MFT of the latex is to mix a water-miscible organic solvent. In this case, as the organic solvent, methyl cellosolve, ethyl cellosolve, isopropyl cellosolve, butyl cellosolve, isopropanol, n-butanol, diacetone alcohol, diethylene glycol monoethyl ether, diethylene glycol acetate or the like can be used. The mixing amount is M
There is no particular limitation as long as it is the amount necessary to lower the FT and does not adversely affect the coatability. Generally, 5 to 200% by weight, based on the weight of the latex, is suitable. As a method of lowering the MFT of the latex, there is a method of copolymerizing a hydrophilic monomer such as acrylic acid or methacrylic acid. In this case, depending on the kind of the hydrophilic monomer, the hydrophilic monomer 0.1 to the solid content of the polymer
20% by weight, preferably 0.5-10% by weight is used. Increasing the amount of hydrophilic monomer lowers the MFT, but conversely lowers the hydrophobicity, resulting in low water resistance after drying. Therefore, it is necessary to determine the optimum amount of the hydrophilic monomer in consideration of these points. The MFT can also be adjusted by changing the pH of the latex coating solution. The MFT can be measured by a well-known method, and for example, the method described in “Chemistry of Polymer Latex” by Soichi Muroi (published by Polymer Society) on page 260 and below can be used.

In the polymer layer of the present invention, a photographic additive such as a matting agent, a surfactant, a dye, a slipping agent, a cross-linking agent, a thickener, a UV absorber, and inorganic fine particles such as colloidal silica may be added, if necessary. May be added. For these additives, Research Disclosure, Vol. 176, 176
The description in item 43 (December 1978) can be referred to. The polymer layer of the present invention may be one layer or two or more layers. The thickness of the polymer layer of the present invention is not particularly limited. However, if the thickness of the polymer layer is too small, the water resistance of the polymer layer will be insufficient and the back layer will swell in the treatment liquid, which is inappropriate. On the contrary, when the thickness of the polymer layer is too large, the water vapor permeability of the polymer layer becomes insufficient, and the moisture absorption / desorption of the hydrophilic colloid layer of the back layer is hindered, resulting in poor curling resistance. Of course, the thickness of the polymer layer also depends on the physical properties of the binder used. Therefore, it is necessary to determine the thickness of the polymer layer in consideration of both of them. The preferable thickness of the polymer layer depends on the kind of the binder of the polymer layer, but is 0.0
It is in the range of 5 to 10 μm, more preferably 0.1 to 5 μm, still more preferably 0.5 to 5 μm. When the polymer layer of the present invention comprises two or more layers, the sum of the thicknesses of all the polymer layers is the thickness of the polymer layer of the silver halide photographic light-sensitive material of the present invention.

The method for applying the polymer layer of the present invention is not particularly limited. After coating and drying the back layer, the polymer layer may be coated on the back layer and then dried, or the back layer and the polymer layer may be coated at the same time and then dried. Apply at the same time, 50 ℃
The method of low temperature drying at less than is preferable. Regarding elements other than the back layer of the light-sensitive silver halide photographic light-sensitive material, such as the silver halide emulsion used in the present invention, JP-A-5-127228.
It is described in column 8 and after of the issue. The silver halide emulsion layer of the silver halide photographic light-sensitive material of the present invention may be one layer or 2 layers.
It may be more than one layer. The silver halide emulsion of the photographic light-sensitive material used in the present invention is usually prepared by adding a water-soluble silver salt (eg silver nitrate) solution and a water-soluble halogen salt (eg potassium bromide) solution in the presence of a water-soluble polymer solution such as gelatin. It is made by mixing with. As the silver halide, any of silver chloride, silver bromide, silver chlorobromide, silver iodobromide and silver chloroiodobromide can be used, and the grain form and size distribution are not particularly limited. The silver halide grains may be tabular grains having an aspect ratio of 3 or more, potato grains, cubic grains, octahedron grains, and the like. In addition to the silver halide emulsion layer, it may have a surface protective layer, an intermediate layer, an antihalation layer and the like, and the surface protective layer may be two or more layers.

There are no particular restrictions on the various additives used in the light-sensitive material of the present invention and the development processing method. For example, those described in the following relevant places can be preferably used. Item Applicable place 1) Silver halide emulsion and its JP-A-2-97937, page 20, lower right column 1, manufacturing method, line 2 to page 21, lower left column, line 14 and JP-A-2-12236 Page 19, upper right column, line 19 to page 8, lower left column, line 12 2) Spectral sensitizing dye JP-A-2-55349, page 7, upper left column, line 8 to page 8, lower right column, line 8 3) Surfactants / antistatic agents JP-A-2-12236, page 9, upper right column, line 7 to same as lower right column, line 7 and JP 2-18542, page 2, left lower column, line 13 from the same Page 4, lower right column, line 18. 4) Antifoggant / Stabilizer JP-A-2-103526, page 17, lower right column, line 19 to page 18, upper right column, line 4 and lower right column, line 1 to line 5. 5) Polymer latex, page 18, lower left column, lines 12 to 20. 6) Compound having an acid group, page 18, lower right column, line 6 to page 19, upper left column, line 1 and JP-A-2-55349, page 8, lower right column, line 13 to page 11, upper left Column line 8 7) Polyhydroxybenzenes, page 11, upper left column, line 9 to lower right column, line 17 of the same. 8) Matting Agent / Slipping Agent / Plasticizer JP-A-2-103526, page 19, upper left column, line 15 to page 19, upper right column, line 15 9) Hardener JP-A-2-103536, page 18, upper right column, lines 5 to 17 10) Dyes, page 17, lower right column, lines 1 to 18 11) Binder JP-A-2-18542, page 3, lower right column, lines 1 to 20. 12) Developer and developing method JP-A-2-55349, page 13, lower right column, line 1 to page 16, upper left column, line 10

The present invention is a silver halide for use as a photosensitive material for printing, a photosensitive material for microfilm, a medical X-ray photosensitive material, an industrial X-ray photosensitive material, a general negative photosensitive material, a general reversal photosensitive material and various color photosensitive materials. It can be applied to photographic light-sensitive materials.

[0019]

EXAMPLES The present invention will be described in more detail by way of examples. However, the present invention is not limited to this embodiment. Example 1 Polyethylene terephthalate having a thickness of 100 μm and having a gelatin undercoat layer on both sides was used as a support. A back layer having the following formulation was applied to one surface of the support by slide coating. Back layer formulation Gelatin 2.5 g / m ² Sodium dodecylbenzene sulfonate 10 mg / m ² Sodium polystyrene sulfonate 30 mg / m ² N, N′-ethylene bis- (vinyl sulfone acetamide) 25 mg / m ² pH of back layer is 1 It was adjusted to 5.7 by adjusting with normal hydrochloric acid. The gelatin used had an isoelectric pH of 4.8. After coating the back layer, leave it at 25 ° C and 65% RH for 1 week to proceed with the cross-linking hardening of Zetilan, and then coat the polymer layer with a wire bar so that the coating amount is as follows and under the condition of 35 ° C and 30% RH. Dried. Polymer concentration in coating liquid is 18% by weight
Was prepared. Latex described in Table 2.0 g / m ² Sodium dodecylbenzenesulfonate 16.5 mg / m ² Polymethylmethacrylate fine particles (average particle size 3 μ) 10 mg / m ² C ₈ F ₁₇ SO ₃ K 5 mg / m ²

Polymer Latex Used and Its MF
The measured values of Tg by T and DSC and the coated surface state are summarized in Table 1. Even if the coating and drying temperature is higher than the MFT determined by the usual method, the surface condition may not always be good. It is presumed that this is because it is difficult to form a film because it is coated on gelatin.
It is clear from Table 1 that the surface state is remarkably improved when T is lowered.

[0021]

[Table 1] Table 1 ─────────────────────────────────── Swelling thickness Polymer latex MFT Tg Tg-MFT Coating surface [μm] ─────────────────────────────────── (PL-1) (Comparative example) 32 38 6 Crack generation ── (PL-2) (Invention) 25 39 14 Good 0.2 (PL-3) (Invention) 13 36 23 Very good 0.1 (PL-4) (Comparative example) 36 40 4 Crack generation ── (PL-5) (Invention) 8 34 26 Very good 0.1 ────────────────────────────────── ──

(PL-1): Latex of methyl methacrylate: ethyl acrylate: methacrylic acid = 66: 32: 2 (pH 8.8) (PL-2): methyl methacrylate: ethyl acrylate: methacrylic acid = 64: 31: 5 Latex (pH
8.8) (PL-3): Methyl methacrylate: Ethyl acrylate: Methacrylic acid = 64: 31: 5 Latex in which isopropyl cellosolve was added at the same weight as the monomer during synthesis (pH 8.8) (PL-4): Methyl methacrylate: 2-ethylhexyl acrylate: Styrene: Methacrylic acid = 60: 2
7: 11: 2 latex (pH 9.0) (PL-5): methyl methacrylate: 2-ethylhexyl acrylate: styrene: methacrylic acid = 59: 2
Latex containing 6: 10: 5 latex with the same weight of isopropyl cellosolve as the monomer at the time of synthesis and butylfurosolve 40% of the monomer (pH 9.0) The coated film thus prepared was immersed in water at 25 ° C for 1 minute, The film thickness before and after immersion was measured with an electronic micrometer manufactured by Anritsu Electric Co., Ltd., and the swollen thickness of the back layer + polymer layer was measured from the difference in film thickness before and after immersion. The results are also shown in Table 1. Although the sample of the comparative example had a very large variation due to cracking and could not obtain data,
The samples of the present invention had extremely good water resistance and good reproducibility.

Example 2 As a support, polyethylene terephthalate having a thickness of 100 μm and having a gelatin undercoat layer on both sides was used. A back layer having the following formulation as a lower layer and a polymer layer as an upper layer were coated on one surface of the support by slide coating. As the coating conditions by slide coating, the distance from the tip of the liquid injector to the support is 0.25 mm,
The transport speed of the support was 150 m / min. Back layer formulation Gelatin 2.5 g / m ² Sodium dodecylbenzene sulfonate 10 mg / m ² Sodium polystyrene sulfonate 30 mg / m ² N, N′-ethylenebis- (vinylsulfoneacetamide) 25 mg / m ² pH of back layer is 1 It was adjusted to 5.7 by adjusting with normal hydrochloric acid. The gelatin used had an isoelectric pH of 4.8. The temperature of the coating solution for the back layer is 35 ° C. and the shear rate is 10 (1
/ Sec) was 50-60 mPa · s. Polymer layer Latex described in Table 1 2.0 g / m ² Sodium dodecylbenzenesulfonate 16.5 mg / m ² Polymethylmethacrylate fine particles 10 mg / m ² C ₈ F ₁₇ SO ₃ K 5 mg / m ²

After coating, the coating film was gelled by blowing air with a dry bulb temperature of 20 ° C. and a wet bulb temperature of 15 ° C. in a chilling zone, and then the dry bulb temperature was 35 ° C. and the wet bulb temperature was 20 ° C.
It was dried by blowing dry air at ℃. The coated surface state was the same as in Example 1, and the latex (PL-1) of Comparative Example was used.
While cracks were observed in (PL-4) and (PL-4), the latex (PL-2) and (PL-
Good surface conditions were obtained in 3) and (PL-5). This coated sample was allowed to stand for 1 week at 25 ° C. and 65%, and then the swelling thickness of the back layer + polymer layer was measured in the same manner as in Example 1. The results are summarized in Table 2. Although the water resistance was slightly decreased (the swelling thickness was increased) by the simultaneous coating, the water resistance on the back layer side was still within the preferable range.

[0025]

[Table 2] Table 2 ──────────────────────────────── Polymer latex Coated surface swelling thickness [μm] ── ────────────────────────────── (PL-1) (Comparative example) Crack occurrence ── (Large variation) (PL- 2) (Invention) Good 0.4 (PL-3) (Invention) Good 0.3 (PL-4) (Comparative example) Crack generation ── (Large variation) (PL-5) (Invention) Good 0.5 ─────────────────────────────────

Example 3 A biaxially stretched polyethylene terephthalate support (thickness: 100 μm) was coated on both sides with the first and second subbing layers of the following composition, and then on one side, the conductive composition of the following composition was used. Layer (Surface resistivity: 2 at 25 ° C 10% RH
× were simultaneously coated in the same manner as the back layer and the polymer layer as in Example 2 After the coating ¹⁰ 10 Ω). As the polymer latex, the polymer latex (PL-3) in Table 1 was used, and as a comparative example, a sample having only a back layer without a polymer layer was prepared.

<First Layer of Undercoat Layer> Aqueous dispersion of copolymer of vinylidene chloride / methyl methacrylate / acrylonitrile / methacrylic acid (90/8/1/1 weight ratio) 15 parts by weight 2,4-dichloro- 6-Hydroxy-s-triazine 0.25 〃 Polystyrene fine particles (average particle size 3 µ) 0.05 〃 Compound-1 0.20 〃 Water was added to 100 〃 Further, 10% by weight of KOH was added to adjust pH to 6. The coating liquid was applied at a drying temperature of 180 ° C. for 2 minutes so that the dry film thickness was 0.9 μm. <Undercoat layer 2nd layer> Gelatin 1 part by weight Methylcellulose 0.05 〃 Compound-2 0.02 〃 C ₁₂ H ₂₅ O (CH ₂ CH ₂ O) ₁₀ H 0.03 〃 Compound-3 3.5 × 10 ^-3 〃 Acetic acid 0.2 〃 Water is added 100 〃 This coating solution is dried at 170 ℃ for 2 minutes and the dry film thickness is
It was applied so as to be 1 μm. <Conductive layer> SnO ₂ / Sb (9/1 weight ratio, average particle size 0.25μ) 300 mg / m ² Gelatin (Ca ⁺⁺ content 30 ppm) 170 〃 Compound-3 7 〃 Sodium dodecylbenzenesulfonate 10 〃 Dihexyl -Α-sulfosuccinate sodium 40〃 sodium polystyrene sulfonate 9〃

[0028]

[Chemical 1]

Further, a photosensitive layer (a dyeing layer, an emulsion layer, a protective layer lower layer, and a protective layer upper layer) described in Example 3 of JP-A-5-127282 was coated simultaneously on the side opposite to the back layer of this support. When the drying property was measured by the same method as in the same Example 3, the sample having the hydrophobic polymer layer according to the present invention had a faster drying time and was better than the comparative sample having no polymer layer.

[0030]

Since the photographic light-sensitive material of the present invention has a back surface coating layer having excellent water resistance, it is excellent in drying property, the replenishing amount of the processing solution can be reduced, and the curling prevention performance can be maintained. The degree of change is also small.

Claims (3)

[Claims] 1. A surface of a support is coated with at least one silver halide emulsion layer having a hydrophilic colloid as a binder, and the surface of the support is opposite to the surface on which the silver halide emulsion layer is coated. A silver halide in which a non-photosensitive hydrophilic colloid layer having a hydrophilic colloid as a binder is coated on its side surface, and a hydrophobic polymer layer formed of latex as the outermost layer of the non-photosensitive hydrophilic colloid layer. In the photographic light-sensitive material, a silver halide photographic light-sensitive material characterized in that the minimum film-forming temperature of the latex forming the hydrophobic polymer layer is lower than the glass transition temperature of the polymer after drying by 10 ° C. or more. 2. The silver halide photographic light-sensitive material according to claim 1, wherein the glass transition temperature of the polymer after drying the polymer latex is 15 ° C. or higher. 3. The silver halide according to claim 1, wherein the non-photosensitive hydrophilic colloid layer and the hydrophobic polymer layer are produced by applying multiple layers on a support and subsequently drying. Photographic material.