JPH06266049A - Photographic polyester type support - Google Patents

Abstract

PURPOSE:To provide the photographic polyester type support insusceptible to winding tendency at the time of heat treatment and good in planeness. CONSTITUTION:The photosensitive material is obtained by forming at least one photosensitive layer on a polyester film support, and this polyester film support is characterized by having a glass transition point of 90-200 deg.C, and being heat-treated in the temp-range from 50 deg.C to its glass transition point during the time from its film-forming to application of a photosensitive layer by using a winding core having a modulus of elasticity of >=500,000kg/cm<2> and coated with a material having that of <=50,000kg/cm<2>.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a photographic polyester base for a photographic material which does not easily curl when heated and does not impair the flatness of the film and does not cause uneven coating when an emulsion is applied. It is about.

[0002]

Photographic light-sensitive materials are generally prepared by coating at least one photographic light-sensitive layer on a plastic film support. This plastic film as a photographic support is generally a fiber-based polymer represented by triacetyl cellulose (hereinafter referred to as "TAC") and polyethylene terephthalate (hereinafter referred to as "P").
A polyester-based polymer represented by "ET") is used. Further, recently, polyethylene naphthalate, which is more heat resistant than PET, has been investigated.

Generally, photographic light-sensitive materials include those in the form of sheets and those in the form of rolls such as X-ray films, plate-making films and cut films. A typical roll film is 35
A color film or a black-and-white negative film, which is stored in a cartridge with a width of mm or less, and which is loaded into a general camera and used for photographing, can be mentioned.

Conventionally, TA has been mainly used for roll films.
A support made of C film is used. A feature of the TAC film as a photographic support is that it has no optical anisotropy and high transparency, and that it has excellent properties in decurling after development processing. The excellent property for decurling is due to its molecular structure possessed by the TAC film. That is, the TAC film has a relatively high water absorption as a plastic film and can absorb the molecular chains by water absorption in the developing process, so that the curl curl which is generated after being stored as a roll film over time is generated. This can be solved by causing rearrangement in the immobilized molecular chain.

On the other hand, in a photographic light-sensitive material using a film having no curling curl eliminating property, when it is used in a roll state, for example, scratches are caused in a printing step for forming an image on photographic printing paper after development. However, there are problems such as occurrence of blur, defocus, and jamming during transportation. By the way, in recent years, the applications of photographic light-sensitive materials have been diversified, and the speed of film transportation during photographing, the increase in photographing magnification, and the downsizing of photographing apparatuses have been significantly advanced. For that purpose, a support for a photographic light-sensitive material is required to have properties such as strength, dimensional stability and thinning.

However, since the TAC film has a rigid molecular structure, the quality of the formed film is fragile,
At present, there are difficulties in using these applications.

[0007]

On the other hand, the polyester film has been considered as a substitute for the TAC film because it has excellent productivity, mechanical strength and dimensional stability. By the way, polyester film
In a roll form widely used as a photographic light-sensitive material, curl curl strongly remains, so handling property after development processing is poor, and although it has the above-mentioned excellent properties, it is difficult to use as a roll film, which is a problem. there were. As a means for solving the problem of curling curl, it is known that the curl is reduced by heating the film according to US Pat. No. 4,141,735. However, if the bulk roll is simply heated on an industrial scale, winding, tackiness, and wrinkles occur, resulting in uneven coating when the emulsion is coated, which cannot be practically used. The purpose of the present invention is to
Another object of the present invention is to provide a photographic polyester base having good flatness, in which curling curl hardly occurs when heat-treated.

[0008]

According to the present invention, the polyester film support having at least one photosensitive layer on the polyester film support has a glass transition temperature of 9 or less.
Core winding used for heat treatment in the temperature range of 0 ° C. or higher and 200 ° C. or lower, and in the temperature range of 50 ° C. or higher and the glass transition temperature of the polyester or lower between the film formation of the polyester film support and the coating of the photosensitive layer. The core material is 500,000
has an elastic modulus of kg / cm ^{2 and} an elastic modulus of 50,0
This is achieved by a photographic polyester support characterized in that the polyester film is wound around a core core coated with a material of 00 kg / cm ² or less and heat-treated.
The polyester photographic support used in the present invention refers to a polymer obtained by polycondensation of a dibasic carboxylic acid or its ester derivative and a glycol mainly containing ethylene glycol, and has transparency, dimensional stability and mechanical strength of the film. Other polymers and additives may be added, or two or more kinds of dibasic acids or two or more kinds of glycols may be copolymerized, or two or more kinds of polyesters may be blended, within a range that does not impair the above.

The polyester of the present invention is formed from a diol and a dicarboxylic acid, and usable dibasic acids include terephthalic acid, isophthalic acid, phthalic acid, phthalic anhydride, succinic acid, glutaric acid, adipic acid, Sebacic acid, succinic anhydride, maleic acid, fumaric acid, maleic anhydride, itaconic acid, citraconic anhydride, tetrahydrophthalic anhydride, diphenylene p, p'-dicarboxylic acid, tetrachlorophthalic anhydride, 3,6-endomethylene Tetrahydrophthalic anhydride, 1,4-cyclohexanedicarboxylic acid,

[0010]

[Chemical 1]

[0011]

[Chemical 2]

And the like. Usable diols include ethylene glycol, 1,3-propanediol, 1,2-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol and 1,7-heptane. Diol, 1,8-octanediol, 1,10-decanediol, 1,12-
Dodecanediol, 1,4-cyclohexanediol,
1,4-cyclohexanedimethanol, 1,3-cyclohexanediol, 1,1-cyclohexanedimethanol, catechol, resorcin, hydroquinone, 1,4
-Benzenedimethanol,

[0013]

[Chemical 3]

[0014]

[Chemical 4]

And the like. Further, if necessary, a monofunctional or trifunctional or higher polyfunctional hydroxyl group-containing compound or acid-containing compound may be copolymerized. In addition, the polyester of the present invention may be copolymerized with a compound having a hydroxyl group and a carboxyl group (or an ester thereof) at the same time in the molecule.

The following are examples of such compounds.

[0017]

[Chemical 5]

Among the polyesters composed of these diols and dicarboxylic acids, more preferred are polyethylene-2,6-dinaphthalate (PEN), polyarylate (PAr), polycyclohexanedimethanol terephthalate (PCT) and the like. Homopolymer and dicarboxylic acid 2,6-naphthalenedicarboxylic acid (NDCA), terephthalic acid (TPA), isophthalic acid (IPA), orthophthalic acid (OPA), cyclohexanedicarboxylic acid (CHDC), paraphenylenedicarboxylic acid (PPDC) ), As a diol, ethylene glycol (EG), cyclohexanedimethanol (CHD
M), neopentyl glycol (NPG), bisphenol A (BPA), biphenol (BP), and parahydroxybenzoic acid (PHB) as a hydroxycarboxylic acid.
A), 6-hydroxy-2-naphthalenecarboxylic acid (H
NCA) is copolymerized. More preferred among these are copolymers of 2,6-naphthalenedicarboxylic acid, terephthalic acid and ethylene glycol (mixing molar ratio of naphthalenedicarboxylic acid and terephthalic acid is 0.3: 0.7 to 1: 0). Is preferable, and 0.5: 0.5 to 0.8: 0.2 is more preferable.), A copolymer of terephthalic acid, ethylene glycol and bisphenol A (mixing molar ratio of ethylene glycol and bisphenol A is 0.6: It is preferably between 0.4 and 0: 1.0, and more preferably between 0.5: 0.5 and 0.1: 0.9.
Is preferred. ), Isophthalic acid, paraphenylenedicarboxylic acid, and a copolymer of terephthalic acid and ethylene glycol (isophthalic acid; the molar ratio of paraphenylenedicarboxylic acid is 0.1 to 1 when terephthalic acid is 1).
0.0, 0.1 to 20.0, and more preferably 0.2 to 5.0 and 0.2 to 10.0), naphthalenedicarboxylic acid, and a copolymer of neopentyl glycol and ethylene glycol (neo). The molar ratio of pentyl glycol and ethylene glycol is 1: 0 to 0.7: 0.3.
Is preferable, and more preferably 0.9: 0.1 to 0.6:
0.4), terephthalic acid, a copolymer of ethylene glycol and biphenol (the molar ratio of ethylene glycol and biphenol is preferably 0: 1.0 to 0.8: 0.2, more preferably 0.1: 0.9). ~ 0.7: 0.3
Is. ), Para-hydroxybenzoic acid, a copolymer of ethylene glycol and terephthalic acid (the molar ratio of para-hydroxybenzoic acid, ethylene glycol is 1: 0 to 0.1:
0.9 is preferable, and 0.9: 0.1 is more preferable.
0.2: 0.8) and other copolymers and PEN and PET
(A composition ratio of 0.3: 0.7 to 1.0: 0 is preferable, and 0.
5: 0.5 to 0.8: 0.2 is more preferable), PET
And PAr (composition ratio of 0.6: 0.4 to 0: 1.0 is preferable, and 0.5: 0.5 to 0: 0.9 is more preferable).

PEN (polyethylene 2,6-dinaphthalate) is the most balanced of these polyesters, has a mechanical strength, particularly a high elastic modulus, and has a glass transition temperature of 120 ° C. which is sufficiently high. . However, it has the drawback of emitting fluorescence. On the other hand, PCT has a high mechanical strength and a glass transition temperature as high as around 110 ° C., but has an extremely high crystallization rate, which makes it difficult to obtain a transparent film. PAr has the highest glass transition temperature (190 ° C.) among these polymers, but has the disadvantage that mechanical strength is weaker than that of PET. Therefore, in order to make up for these drawbacks, blends of these polymers or copolymers of the monomers forming them can be used.

These homopolymers and copolymers can be synthesized according to conventionally known methods for producing polyesters. For example, when the acid component is directly esterified with the glycol component, or when a dialkyl ester is used as the acid component, first, the transesterification reaction with the glycol component is performed, and this is heated under reduced pressure to remove the excess glycol component. By doing so, it can be synthesized. Alternatively, the acid component may be an acid halide and reacted with glycol. At this time, if necessary, a transesterification reaction catalyst, a polymerization reaction catalyst, or a heat resistance stabilizer may be added. Regarding these polyester synthesis methods, for example, Polymer Experimental Science Vol. 5, "Polycondensation and Polyaddition" (Kyoritsu Shuppan, 1980), pp. 103-136.
Page, "Synthetic Polymer V" (Asakura Shoten, 1971), 18th
It can be performed with reference to the descriptions on pages 7 to 286.

Further, Japanese Patent Publication No. 4040414 and Japanese Patent Publication No.
-81325, JP-A-50-109715, JP-A-1-
287129, JP-A-1-266130, JP-A1-2
66133, JP-A-55-115425, JP-A-1-
244446, JP-A-4-93937, etc. can be referred to. The preferred average molecular weight range for these polyesters is about 10,000 to 500,000.

Polymer blends of the polymers thus obtained are disclosed in JP-A-49-5482 and JP-A-64-5482.
4325, JP-A-3-192718, Research Disclosure 283, 739-41, 284, 779.
-82, 294, 807-14, it can be easily formed. Further, in order to improve the adhesiveness with other polyesters, these polyesters may be partially blended with other polyesters, or the monomers constituting the other polyesters may be copolymerized, or In addition, a monomer having an unsaturated bond can be copolymerized and radically crosslinked.

As the polyester type photographic support used in the present invention, PET and polyethylene naphthalate, polycyclohexanedimethanol terephthalate,
Polyarylate and blends thereof, with polyethylene naphthalate being particularly preferred. Further, various additives can be contained in the polyester film of the present invention.

One of the properties which poses a problem when the polyester film is used as a support for a photographic light-sensitive material is the problem of fogging caused by the high refractive index of the support. The refractive index of the polyester film is 1.6-
The refractive index of gelatin used exclusively for the subbing layer and the photographic emulsion layer is 1.50 to 1.55.
Is. The ratio of the refractive index to gelatin is less than 1, and when light enters from the film edge, it is easily reflected at the interface between the base and the emulsion layer. Therefore, the polyester film is a so-called light piping phenomenon (flickering).
Easy to cause.

In the present invention, in order to avoid such a light piping phenomenon, a dye which does not increase the film haze can be added. The dye used is not particularly limited, but is preferably a dye having a gray color tone due to the general property of the light-sensitive material, and also has excellent heat resistance in the film forming temperature range of the polyester film and has compatibility with polyester. Excellent ones are preferred. As a specific dye, from the above viewpoint, Diaresi manufactured by Mitsubishi Kasei
n, Kayase manufactured by Nippon Kayaku, and the like. The dyeing density is required to be at least 0.01 or more, preferably 0.03 or more, as measured by a Macbeth color densitometer.

Further, an ultraviolet absorber may be kneaded into these polymer films for the purpose of preventing fluorescence and imparting stability with time. It is desirable that the ultraviolet absorber has no absorption in the visible region, and the addition amount thereof is usually 0.01% by weight to 2% based on the weight of the polymer film.
It is 0% by weight, preferably about 0.05% to 1.0% by weight. As the ultraviolet absorber, 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, 4-dodecyloxy-2-hydroxybenzophenone, 2,2 ', 4. 4'-tetrahydroxybenzophenone, 2,2'-dihydroxy-4,4'-
Benzophenone series such as dimethoxybenzophenone, 2
(2'-hydroxy-5-methylphenyl) benzotriazole, 2 (2'-hydroxy-3 ', 5'-di-t
-Butylphenyl) benzotriazole, 2 (2'-hydroxy-3'-di-t-butyl-5'-methylphenyl) benzotriazole and other benzotriazoles, phenyl salicylate, salicylate-based UV absorbers such as methyl salicylate Can be mentioned.

The heat treatment of the present invention needs to be performed at a temperature of 50 ° C. or higher and a glass transition temperature or lower for 0.1 to 1500 hours. This effect progresses faster as the heat treatment temperature increases. However, when the heat treatment temperature exceeds the glass transition temperature, the molecules in the film move rather disorderly and conversely the free volume increases, and the molecules tend to flow, that is, the film is easily wound. Therefore, this heat treatment needs to be performed at a temperature not higher than the glass transition temperature. On the other hand, at a temperature of 50 ° C. or lower, this effect progresses only at a remarkably slow speed, which requires a lot of time and is impractical. Therefore, this heat treatment is preferably performed at a temperature slightly below the glass transition temperature for the purpose of shortening the processing time, and is 50 ° C. or more and the glass transition temperature or less, and more preferably 30 ° C. or more and the glass transition temperature below the glass transition temperature. It is the following. On the other hand, when the heat treatment is performed under this temperature condition, the effect is recognized after 0.1 hour. Meanwhile, 1500
Over time, the effect is almost saturated. Therefore, it is necessary to perform heat treatment for 0.1 hour or more and 1500 hours or less.

Next, the core of the present invention will be described. The core winding core of the present invention has a temperature range of 50 ° C. or higher and the glass transition temperature of the polyester or lower, and is 500,000 kg / cm ²
It has the above elastic modulus and the temperature coefficient of the elastic modulus is 30 or less. The elastic modulus is more preferably 550000 kg / cm ² or more. The temperature coefficient of elastic modulus is preferably 30 or less, more preferably 25 or less. It is essential that the cross section of the winding core having these characteristics of the present invention is a perfect circle. The material of these core winding cores is not particularly limited as long as it has the elastic modulus of the present invention, but metal, ceramic or ceramic coated metal is preferable. Here, preferable examples of the metal include aluminum, stainless steel (indicating an alloy of iron, chromium and nickel), brass (an alloy of copper and nickel), copper, iron and duralumin (an alloy containing copper, magnesium, manganese and silicon). Of these, aluminum, stainless steel, and iron are more preferable. The ceramic material is not particularly limited, but 3Al ₂ O ₃ -2S is preferable.
_{iO 2, BaTiO 3, SrTiO 3} , Y 2 O 3 -Th
O ₂ , ZrTiO ₃ , ZrO ₂ , Si ₃ N, SiCMg
O.SiO ₂ and MgCr ₂ O ₄ —TiO ₂ may be mentioned, and particularly preferred is 3Al ₂ O ₃ -2Si.
_{O 2, BaTiO 3, SiTiO 3} , a ZrO _2.
Further, the core winding core of the present invention may be a mixture or laminate of two or more kinds of materials. For example, the surface of aluminum may be coated with Al ₂ O ₃ or CrO ₂ . Alternatively, the surface of the stainless material should be CrO ₂
Or may be coated very thinly with a fluororesin.

The diameter of the core winding core of the present invention is 100.
It must be at least mm. When the diameter is smaller than this, heat treatment causes beading and wrinkles. 60
When it is 0 mm or more, it becomes bulky, which is inconvenient in storage and transportation and is not realistic. Preferably, the diameter is from 150 mm
It is 450 mm, more preferably 200 to 400 mm. An object of the present invention is to obtain a photographic polyester-based support which is hard to have curl curl when heat-treated, does not impair the flatness of the film, and causes no coating unevenness when an emulsion is coated. The core winding core used for the heat treatment applied to the support for this purpose is coated with a suitable material. In the heat treatment, the support needs to be carefully wound around the core winding so that wrinkles and twists do not occur. After that, the support is shrunk by heat treatment, so that a large stress is also applied to the core winding core itself. Therefore, as described above, it is preferable that the core winding core itself is made of a material that is not easily deformed. Further, since the support near the winding core has a smaller radius of curvature than other portions, the support is greatly deformed by contraction. Since the core winding core itself is less likely to be deformed, this conventional method causes a large strain in the support near the winding core, and the flatness is seriously impaired. On the other hand, in the present invention, the core winding is coated with a material that absorbs the strain generated in the support, which is advantageous in that the above-mentioned problems do not occur. That is, even when using only a core core that does not have a coating and has an elastic modulus of 500,000 kg / cm ² or more and is not easily deformed, the effect of not impairing the flatness can be expected, but in a high temperature heat treatment for a long time, This is disadvantageous because the support near the winding core is deformed and cannot be used as a photographic support. On the other hand, in the present invention, by covering the core winding core, the flatness of the support is not impaired even in the vicinity of the winding core, and there is no loss of support, which is advantageous. From the above relationship, the elastic modulus of the material covering the core core is 10 kg / cm ² or more 5
50,000 kg / cm ² or less and a temperature coefficient of elastic modulus of 30
The following is desirable. Elastic modulus is more preferably 50 kg / cm ² or more 45,000kg / cm ² or less. The temperature coefficient of the elastic modulus is 30 or less, more preferably 25 or less. Further, it is desirable that the thickness of the material coated on the core winding core is 0.005 mm or more and 20 mm or less. More preferably, it is 0.01 mm or more and 100 mm or less. If the material of the coating is too hard, the effect of the present invention will not be exhibited, but on the other hand, the material of the coating is too soft, or even if it has a sufficient elastic modulus, the temperature coefficient is large and becomes too soft during heat treatment, or the coating is too thick. In this case, although the effect of absorbing the strain is great, it is not preferable because wrinkles and twists occur when the support is wound or after shrinkage due to heat treatment.

The material of these core winding core coatings is not particularly limited as long as it has the elastic modulus of the present invention, but it is a thermoplastic resin such as polyethylene, polypropylene, polystyrene, vinyl chloride, fluororesin, polyurethane, or phenol. Thermosetting resin such as resin, amino resin, unsaturated polyester resin, epoxy resin, polyimide resin, silicone resin or various engineering plastics or general rubber such as natural rubber, isoprene rubber, styrene-butadiene rubber, butadiene rubber, chloroprene, ethylene Special rubbers such as propylene rubber, acrylonitrile-silicone rubber and acrylic rubber are preferred. Of these materials, polyurethane is particularly preferable, and hard polyurethane is more preferable. The hardness of these materials can be changed in a wide range by changing the types and ratios of the polyol, the isocyanate, and the cross-linking agent, which are the raw materials, and thus desired physical properties can be easily obtained. Specific product names of these materials include Desmopan, Elastollan, Paraprene, and Pandex. Further, these materials may contain various fillers for the purpose of obtaining a desired elastic modulus or for simply increasing the strength. As the filler, fibers such as glass fiber and carbon fiber, carbon black, various calcium salts, and reinforcing agents such as titanium white and various clays are preferable. Fibers that are particularly effective in improving strength are desirable.

For film formation, melt extrusion and biaxial stretching are preferred. That is, it is melt-extruded at a melting point or higher and 350 ° C or lower onto a rotary cooling body to form an amorphous amorphous sheet, and then 70 to 160 ° C, preferably 80 to 130 ° C.
3.0 to 3.5 times in the vertical direction at ℃, preferably 3.2 to
Roll stretch 3.5 times, then 70-150 in the transverse direction
C., preferably 80 to 130.degree. C., and tenter stretched 3.0 to 4.2 times, preferably 3.5 to 4.0 times at a temperature higher than that at the time of longitudinal stretching, and then transverse stretching temperature or more and 260.degree. C. or less, It is preferably heat-set at 150 to 250 ° C. or lower, and then heat-released by 0.1-10%, preferably 0.5-5%,
Then cool and wind. Simultaneous biaxial stretching of stretching and tenter clip method is also preferably used. Further, it is also possible to carry out longitudinal stretching again after transverse stretching. If the stretching ratio is out of the above range, the vertical and horizontal storage is unbalanced, and the heat treatment causes the flatness to be deteriorated, which is unsuitable as a photographic support. The thickness of the polyester film used in the present invention is 50 to 90 μm.
Is desirable. When the thickness is less than 50 μm, the shrinkage stress of the photosensitive layer generated during drying cannot be endured and a gutter-like curl is generated, which is not preferable. If it is 90 μm or more, it is inconsistent with the compactness of the camera and the cartridge.

These ultraviolet absorbers may be added to the undercoat or backing layer, the emulsion layer or the antihalation layer. It is also possible to impart slipperiness to the polyester film depending on the application. The slipperiness imparting means is not particularly limited, but kneading an inactive inorganic compound, coating a surfactant, or the like is generally used. Also, a method using an internal particle system in which a catalyst or the like added during the polyester polymerization reaction is precipitated can be used.

As the above-mentioned inert inorganic compound, SiO ₂ ,
Examples thereof include TiO ₂ , BaSO ₄ , CaCO ₃ , talc, kaolin and the like. Since transparency is an important requirement for a support for a photographic light-sensitive material, SiO ₂ having a refractive index relatively close to that of a polyester film, or an internal particle system capable of relatively reducing the precipitated particle size is selected. It is desirable to do.

In the case of imparting slipperiness by kneading, a method of laminating a layer imparted with a function in order to obtain more transparency of the film is also preferably used. Specific examples include a co-extrusion method using a plurality of extruders and feed blocks, or a multi-manifold die. When the polyester is film-formed, the polymerized polyester may be subjected to the film-forming step in a molten state, or may be once formed into pellets and then subjected to the film-forming step. When pelletized, it is preferably dried before extrusion.

In the present invention, the glass transition temperature and the measurement are measured as follows. [Glass transition temperature] [Tg] Using a differential thermal analyzer (DSC), sample film 10
When an endothermic peak appears in the arithmetic mean temperature or Tg of the temperature at which deviation starts from the baseline and the temperature at which the baseline returns to a new baseline when the temperature of mg is raised at 20 ° C / min in a helium nitrogen stream, this The temperature showing the maximum value of the endothermic peak is defined as Tg. The polyester film of the present invention can be subjected in advance to various surface treatments such as corona discharge treatment, glow treatment, ultraviolet treatment, chemical treatment, and fire treatment in order to improve adhesion and wettability of the coating liquid. . These surface treatment methods can be appropriately used as necessary. (For example, U.S. Pat. Nos. 2,698,241, 2,764,520, 2,864,755, 3,462,335, 3,475,193, 3,143,421. No. 3,501,301, No. 3,460,944, No. 3,674,531, British Patent No. 788,365,
No. 804,005, No. 891,469, Japanese Patent Publication No. 48
-43122, 49-26580, 51-44.
No. 6 etc.)

[Elastic Modulus] Using a tensile tester, a marked line interval of 5
When a sample punched into a 0 mm dumbbell-shaped standard test piece was stretched at a tensile speed of 10 mm / min, in the region where the strain indicated by the marked line of the sample and the stress corresponding thereto have a linear relationship, Calculate the slope of stress with respect to the amount of strain. This is a value called Young's modulus, which is defined here as the elastic modulus. Further, the elastic modulus at various temperatures is measured, and the value obtained by dividing the rate of change of elastic modulus with temperature by the elastic modulus at 20 ° C. is defined as the temperature coefficient of elastic modulus. The polyester support of the present invention preferably has a subbing layer in order to increase the adhesive force with a photographic layer such as a photosensitive layer coated thereon. Examples of the subbing layer include a subbing layer using a polymer latex made of a styrene-butadiene copolymer or a vinylidene chloride copolymer, and a subbing layer using a hydrophilic binder such as gelatin.

The subbing layer preferably used in the present invention is a subbing layer using a hydrophilic binder. Examples of the hydrophilic binder used in the present invention include water-soluble polymers, cellulose esters, latex polymers and water-soluble polyesters. Examples of the water-soluble polymer include gelatin, gelatin derivatives, casein, agar, sodium alginate, starch, polyvinyl alcohol, polyacrylic acid copolymers, maleic anhydride copolymers, etc., and carboxymethyl cellulose as a cellulose ester,
Hydroxyethyl cellulose and the like. Examples of the latex polymer include vinyl chloride-containing copolymers, vinylidene chloride-containing copolymers, acrylic acid ester-containing copolymers, vinyl acetate-containing copolymers and butadiene-containing copolymers. Of these, gelatin is the most preferable.

As the compound for swelling the support used in the present invention, resorcin, chlorresorcin, methylresorcin, o-cresol, m-cresol, p-cresol, phenol, o-chlorophenol, p-chlorophenol, di-resin. Examples include chlorophenol, trichlorophenol, monochloroacetic acid, dichloroacetic acid, trifluoroacetic acid, and chloral hydrate. Of these, resorcin and p-chlorophenol are preferred.

Various gelatin hardeners can be used in the subbing layer of the present invention. As gelatin hardening agents, chromium salts (chromium alum, etc.), aldehydes (formaldehyde, glutaraldehyde, etc.), isocyanates, active halogen compounds (2,4-dichloro-6-hydroxy-S-triazine, etc.), epichlorohydrin resin And so on.

The subbing layer of the present invention comprises SiO ₂ , Ti
Inorganic fine particles such as O ₂ or polymethylmethacrylate copolymer fine particles (1 to 10 μm) can be contained as a matting agent. The undercoat layer according to the present invention can be applied by a generally well-known coating method, for example, a dip coating method, an air knife coating method, a curtain coating method, a wire bar coating method, a gravure coating method, an extrusion coating method or the like. Is.

The light-sensitive material of the present invention may have a non-light-sensitive layer such as an anti-halation layer, an intermediate layer, a back layer and a surface protective layer in addition to the light-sensitive layer. The binder for the back layer may be a hydrophobic polymer or a hydrophilic polymer used in the underlayer. The back layer of the light-sensitive material of the present invention may contain an antistatic agent, a slip agent, a matting agent, a surfactant, a dye and the like. The antistatic agent used in the back layer of the present invention is not particularly limited, and examples of the anionic polymer electrolyte include polymers containing a carboxylic acid, a carboxylic acid salt and a sulfonic acid salt, for example, JP-A-48-22017. Issue, Japanese Patent Publication No. 46-24
159, JP-A-51-30725 and JP-A-51-1.
29216 and Japanese Patent Application Laid-Open No. 55-95942. Examples of the cationic polymer include JP-A-49-121523 and JP-A-48-911.
65 and Japanese Patent Publication No. 49-24582. In addition, ionic surfactants are also anionic and cationic. For example, JP-A-49-85826.
No. 49,33630, US Pat. No. 2,992,10
8, US 3,206,312, JP-A-48-87826.
Issue, Japanese Examined Patent Publication No. 49-11567, Japanese Examined Patent Publication No. 49-1156
No. 8, JP-A-55-70837 and the like can be mentioned.

The most preferable antistatic agent for the back layer of the present invention is ZnO, TiO ₂ , SnO ₂ or Al _2.
O ₃ , In ₂ O ₃ , SiO ₂ , MgO, BaO, MoO
It is fine particles of at least one crystalline metal oxide selected from the group ₂ or a composite oxide thereof. The fine particles of the conductive crystalline oxide or the composite oxide thereof used in the present invention have a volume resistivity of 10 ⁷ Ωcm or less, more preferably 10 ⁵ Ωcm or less. The particle size is preferably 0.01 to 0.7 µ, and more preferably 0.02 to 0.5 µ.

Regarding the method for producing fine particles of a conductive crystalline metal oxide or composite oxide used in the present invention, JP-A-56-143430 and JP-A-60-258541 are used.
In the specification of the issue. First, a method of producing metal oxide fine particles by firing and performing heat treatment in the presence of a heteroatom that improves conductivity, and second, a method of improving conductivity when producing metal oxide fine particles by firing. A method of making atoms coexist, a third method of introducing oxygen defects by lowering the oxygen concentration in the atmosphere when producing metal fine particles by firing, and the like are easy. Examples of containing different kinds of atoms include Al, In, etc. for ZnO, Nb, Ta, etc. for TiO ₂ , Sb, Nb, halogen elements, etc. for SnO ₂ . The addition amount of the heteroatom is 0.01 to
The range of 30 mol% is preferable, but 0.1 to 10 mol%
If so, it is particularly preferable.

[0044]

EXAMPLES The present invention will be specifically described below with reference to examples. However, the present invention is not limited to this embodiment. Example 1 1) Types of support (polyester film) and heat treatment Various polyester film rolls made of the materials shown in Table 1 below and serving as bulk rolls were used.
The heat treatment was carried out under the heat treatment conditions shown in (1), and the flatness (presence or absence of wrinkles, stickiness, etc.) after the heat treatment was confirmed, and the following 2) Coating of undercoat layer was performed.

[0045]

[Table 1]

2) Coating of Undercoat Layer The present support was provided with an undercoat layer by applying corona discharge treatment on both sides of each support and then applying an undercoat solution having the following composition. For the corona discharge treatment, a solid state corona treatment machine 6KVA model manufactured by Pillar Co. is used, and a 30 cm wide support is treated at 20 m / min. From the current and voltage readings at this time, the object to be treated was treated at 0.375 KV · A · min / m ² . The discharge frequency during the treatment was 9.6 KHz, and the electrode-dielectric roll gap clearance was 1.6 mm. (Composition of undercoat liquid) Gelatin 3 g Distilled water 250 cc Sodium α-sulfodi-2-ethylhexyl succinate 0.05 g Formaldehyde 0.02 g 3) Application of back layer What is the side of the support after the undercoat is provided with the undercoat layer? A back layer having the following composition was applied on the opposite surface. 3-1) Preparation of conductive fine particle dispersion liquid (tin oxide-antimony oxide composite dispersion liquid): 230 parts by weight of stannic chloride hydrate and 23 parts by weight of antimony trichloride were added to 300 parts of ethanol.
It was dissolved in 0 part by weight to obtain a uniform solution. A 1N aqueous sodium hydroxide solution was added dropwise to this solution until the pH of the solution became 3, to obtain a coprecipitate of colloidal stannic oxide and antimony oxide. The coprecipitate obtained is left at 50 ° C. for 24 hours,
A reddish brown colloidal precipitate was obtained.

The reddish brown colloidal precipitate was separated by centrifugation. To remove excess ions, water was added to the precipitate and washed by centrifugation. This operation was repeated 3 times to remove excess ions. Colloidal precipitate from which excess ions have been removed 2
00 parts by weight was redispersed in 1500 parts by weight of water, and sprayed in a baking furnace heated to 600 ° C. to obtain a bluish average particle size of 0.2.
A fine powder of tin oxide-antimony oxide composite having a size of μm was obtained. The specific resistance of this fine particle powder was 25 Ω · cm.

A mixed solution of 40 parts by weight of the fine particle powder and 60 parts by weight of water was adjusted to pH 7.0, roughly dispersed with a stirrer, and then
Horizontal sand mill (trade name: Dyno Mill; WILLYA.I)
It was prepared by dispersing with BACHOFENAG) until the residence time reached 30 minutes. 3-2) Preparation of Back Layer: The following formulation [A] was applied so that the dry film thickness would be 0.3 μm, and dried at 115 ° C. for 60 seconds. The following coating solution (B) for coating layer was further applied onto this so that the dry film thickness would be 0.1 μm, and the coating solution at 3 ° C. at 115 ° C.
Dry for minutes. [Formulation A] 10 parts by weight of the conductive fine particle dispersion described above 1 part by weight of gelatin 27 parts by weight of water 60 parts by weight of methanol 2 parts by weight of resorcin 0.01 part by weight of polyoxyethylene nonylphenyl ether [coating liquid for coating layer (B)] Cellulose triacetate 1 part by weight Acetone 70 parts by weight Methanol 15 parts by weight Dichloromethylene 10 parts by weight p-Chlorophenol 4 parts by weight 4) Coating of photosensitive layer A composition having the following composition on each support obtained by the above method Multiple layers of core layers were applied to prepare a multilayer color light-sensitive material.

(Photosensitive layer composition) The main materials used for each layer are classified as follows: ExC: Cyan coupler UV: UV absorber ExM: Magenta coupler HBS: High boiling organic solvent ExY: Yellow coupler H: Gelatin hardening agent ExS: Sensitizing dye The number corresponding to each component indicates the coating amount expressed in g / m ² , and for silver halide, the coating amount in terms of silver. However, with respect to the sensitizing dye, the coating amount is shown in mol unit per mol of silver halide in the same layer. (Sample 101) First layer (antihalation layer) Black colloidal silver Silver 0.18 Gelatin 1.40 ExM-1 0.18 ExF-1 2.0 × 10 ^-3 HBS-1 0.20

Second layer (intermediate layer) Emulsion G Silver 0.065 2,5-di-t-pentadecylhydroquinone 0.18 ExC-2 0.020 UV-1 0.060 UV-2 0.080 UV- 3 0.10 HBS-1 0.10 HBS-2 0.020 Gelatin 1.04

Third Layer (Low Sensitivity Red Sensitive Emulsion Layer) Emulsion A Silver 0.25 Emulsion B Silver 0.25 ExS-1 6.9 × 10 ⁻⁵ ExS-2 1.8 × 10 ⁻⁵ ExS-3 3 .1 × 10 ^-4 ExC-1 0.17 ExC-3 0.030 ExC-4 0.10 ExC-5 0.020 ExC-7 0.0050 ExC-8 0.010 Cpd-2 0.025 HBS- 1 0.10 Gelatin 0.87

Fourth Layer (Medium Sensitivity Red Sensitive Emulsion Layer) Emulsion D Silver 0.70 ExS-1 3.5 × 10 ⁻⁴ ExS-2 1.6 × 10 ⁻⁵ ExS-3 5.1 × 10 ⁻⁴ ExC-1 0.13 ExC-2 0.060 ExC-3 0.0070 ExC-4 0.090 ExC-5 0.025 ExC-7 0.0010 ExC-8 0.0070 Cpd-2 0.023 HBS- 1 0.10 Gelatin 0.75

Fifth Layer (High Sensitivity Red Sensitive Emulsion Layer) Emulsion E Silver 1.40 ExS-1 2.4 × 10 ⁻⁴ ExS-2 1.0 × 10 ⁻⁴ ExS-3 3.4 × 10 ⁻⁴ ExC-1 0.12 ExC-3 0.045 ExC-6 0.020 ExC-8 0.025 Cpd-2 0.050 HBS-1 0.22 HBS-2 0.10 Gelatin 1.20

Sixth Layer (Intermediate Layer) Cpd-1 0.10 HBS-1 0.50 Gelatin 1.10

Seventh Layer (Low Sensitivity Green Sensitive Emulsion Layer) Emulsion C Silver 0.35 ExS-4 3.0 × 10 ^-5 ExS-5 2.1 × 10 ^-4 ExS-6 8.0 × 10 ^-4 ExM-1 0.010 ExM-2 0.33 ExM-3 0.086 ExY-1 0.015 HBS-1 0.30 HBS-3 0.010 Gelatin 0.73

Eighth Layer (Medium Sensitivity Green Sensitive Emulsion Layer) Emulsion D Silver 0.80 ExS-4 3.2 × 10 ⁻⁵ ExS-5 2.2 × 10 ⁻⁴ ExS-6 8.4 × 10 ⁻⁴ ExM-2 0.13 ExM-3 0.030 ExY-1 0.018 HBS-1 0.16 HBS-3 8.0 × 10 ^-3 gelatin 0.90

Ninth Layer (High Sensitivity Green Sensitive Emulsion Layer) Emulsion E Silver 1.25 ExS-4 3.7 × 10 ⁻⁵ ExS-5 8.1 × 10 ⁻⁵ ExS-6 3.2 × 10 ⁻⁴ ExC-1 0.010 ExM-1 0.030 ExM-4 0.040 ExM-5 0.019 Cpd-3 0.040 HBS-1 0.25 HBS-2 0.10 Gelatin 1.44

10th layer (yellow filter layer) Yellow colloidal silver Silver 0.030 Cpd-3 0.16 HBS-1 0.60 Gelatin 0.60

Eleventh Layer (Low Sensitivity Blue Sensitive Emulsion Layer) Emulsion C Silver 0.18 ExS-7 8.6 × 10 ⁻⁴ ExY-1 0.020 ExY-2 0.22 ExY-3 0.50 ExY− 4 0.020 HBS-1 0.28 Gelatin 1.10

Twelfth Layer (Medium Sensitivity Blue Sensitive Emulsion Layer) Emulsion D Silver 0.40 ExS-7 7.4 × 10 ⁻⁴ ExC-7 7.0 × 10 ⁻³ ExY-2 0.050 ExY-30 .10 HBS-1 0.050 gelatin 0.78

13th layer (high-sensitivity blue-sensitive emulsion layer) Emulsion F Silver 1.00 ExS-7 4.0 × 10 ^-4 ExY-2 0.10 ExY-3 0.10 HBS-1 0.070 Gelatin 0 .86

Fourteenth Layer (First Protective Layer) Emulsion G Silver 0.20 UV-4 0.11 UV-5 0.17 HBS-1 5.0 × 10 ^-2 Gelatin 1.00

Fifteenth layer (second protective layer) H-1 0.40 B-1 (diameter 1.7 μm) 5.0 × 10 ⁻² B-2 (diameter 1.7 μm) 0.10 B-30 .10 S-1 0.20 Gelatin 1.20 Furthermore, the storability, processability, pressure resistance, and antifungal properties of each layer are appropriately adjusted.
To improve antibacterial property, antistatic property and coating property W-
1 to W-3, B-4 to B-6, F-1 to F
-17 compound and iron salt, lead salt, gold salt, platinum salt, iridium salt and rhodium salt are contained.

The composition of the emulsion used in each layer is shown below.

[0065]

[Table 2]

In Table 6, (1) Emulsions A to F were reduction-sensitized at the time of grain preparation using thiourea dioxide and thiosulfonic acid according to the examples of JP-A-2-191938. (2) Emulsions A to F were subjected to gold sensitization, sulfur sensitization and selenium sensitization in the presence of the spectral sensitizing dye described in each photosensitive layer and sodium thiocyanate according to the examples of JP-A-3-237450. Has been done. (3) For the preparation of tabular grains, low molecular weight gelatin is used according to the examples of JP-A-1-158426. (4) Dislocation lines as described in JP-A-3-237450 have been observed in tabular grains and normal crystal grains having a grain structure using a high voltage electron microscope. The chemical formulas of the compounds used for coating the photosensitive layer are shown below.

[0067]

[Chemical 6]

[0068]

[Chemical 7]

[0069]

[Chemical 8]

[0070]

[Chemical 9]

[0071]

[Chemical 10]

[0072]

[Chemical 11]

[0073]

[Chemical 12]

[0074]

[Chemical 13]

[0075]

[Chemical 14]

[0076]

[Chemical 15]

[0077]

[Chemical 16]

[0078]

[Chemical 17]

[0079]

[Chemical 18]

[0080]

[Chemical 19]

[0081]

[Chemical 20]

Development Processing The development processing conditions are as follows. Treatment process Temperature Time Color development 38 ° C 3 minutes Stop 38 ° C 1 minute Water wash 38 ° C 1 minute Bleach 38 ° C 2 minutes Water wash 38 ° C 1 minute Settlement 38 ° C 2 minutes Water wash 38 ° C 1 minute Stabilization bath 38 ° C The treatment liquid used for 1 minute has the following composition. Color developer Caustic soda 2g Sodium sulfite 2g Potassium bromide 0.4g Sodium chloride 1g Hoh sand 4g Hydroxylamine sulfate 2g Ethylenediaminetetraacetic acid disodium dihydrate 2g 4-Amino-3-methyl-N-ethyl-N- (β -Hydroxyethyl) aniline monosulfate) 4g Add water to total 1 liter

Stop solution Sodium thiosulfate 10 g Ammonium thiosulfate (70% aqueous solution) 30 ml Acetic acid 30 ml Sodium acetate 5 g Potassium alum 15 g Water-added to 1 liter Bleaching solution Ethylenediamine tetrairon (III) acetate sodium dihydrate 100 g Potassium bromide 50g Ammonium nitrate 50g Horic acid 5g Ammonia water Adjust the pH to 5.0 and add water to make a total of 1 liter Fixer Sodium thiosulfate 150g Sodium sulfite 15g Hoha sand 12g Glacial acetic acid 15ml Potassium alum 20g Add water to a total amount 1 liter Stabilizing bath 5 g of formic acid 5 g of sodium citrate 5 g of sodium metaphoric acid (tetrahydrate) 3 g of potassium alum 15 g Total amount of 1 liter with water About 1 liter
Then, the uneven coating was investigated. The results are shown in Table 1.

According to Table 1, in Examples 1 to 16 of the present invention, the flatness after heat treatment was good over the entire length of the support, and there was no uneven coating of emulsion, but Comparative Examples not within the range of the present invention In both cases, the surface condition was poor after the heat treatment and uneven coating of the emulsion occurred. That is, in Comparative Example 1 having no core core coating, wrinkles and twists were formed on the support in the vicinity of the core core, which resulted in poor surface condition and uneven emulsion coating around the core of the support. did. That is, in terms of the overall length, a satisfactory shape was obtained in terms of surface shape and coating unevenness on the outer peripheral side of the roll, but it was not possible to obtain a good quality over the entire length as in the present invention. In Comparative Examples 3 and 4, since the elastic modulus of the coated core core was too small, the support near the core core was greatly wrinkled and twisted. Uneven coating occurred.
In the case of Comparative Example 2, since the coating was too thick, this also caused large wrinkles and twists on the support in the vicinity of the core winding, and thus the surface condition was poor over the entire length of the support and uneven coating of the emulsion occurred.

[0085]

EFFECT OF THE INVENTION The polyester photographic support according to the present invention is not coated with a curl and does not impair the flatness of the film when heat-treated at a temperature of not lower than 50 ° C. and not higher than the glass transition temperature in a bulk roll state. It did not become uneven. This polyester photographic support is T
It is superior in mechanical strength to AC and can make the thickness of the film remarkably thin, and it can be expected to have a sufficient effect on future miniaturization of cameras and patrones.

Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display area C08L 67:00

Claims (7)

[Claims] 1. A glass transition temperature of the polyester film support having at least one photosensitive layer on the polyester film support is 90 ° C. or higher and 200 ° C. or lower, and after the polyester film support is formed into a film. From the temperature of not less than 50 ° C. to not more than the glass transition temperature of the polyester between the coating and the coating of the photosensitive layer, the material of the core winding core used in the heat treatment has an elastic modulus of 500,000 kg / cm ² or more, A polyester support for photography, characterized in that the polyester film is wound around a core core coated with a material having an elastic modulus of 50,000 kg / cm ² or less and heat-treated. 2. The polyester support for photography according to claim 1, wherein the material of the core winding core is metal, ceramic, or metal coated with ceramic. 3. The thickness of the coating is 0.01 mm or more and 100.
The photographic polyester support according to claim 1 or 2, which has a size of not more than mm. 4. The photographic polyester support according to claim 1, 2 or 3, wherein the material of the winding core is aluminum, stainless steel or ceramic. 5. A polyester support comprising a polyester containing naphthalenedicarboxylic acid and ethylene glycol as main components, 1, 2, 3 or 4.
Photographic polyester support. 6. The photographic polyester support according to claim 1, wherein the polyester support is polyethylene-2,6-naphthalenedicarboxylate. 7. The polyester has a thickness of 50 to 90 μm.
7. The photographic polyester support according to claim 1, wherein