AU617160B2 - Photographic light-sensitive material having a polyester film support - Google Patents

Description

617160

ALIA

Form COMMONWEALTH OF AUSTR PATENTS ACT 1952 COMPLETE SPECIFICATION FOR OFFICE USE Short Title: Int. Cl: Application Number: Lodged: Complete Specification-Lodged: Accepted: Lapsed: Published: Priority: Related Art: a a 0

S.

TO BE COMPLETED BY APPLICANT S 0 Name of Applicant: Address of Applicant: Actual Inventor: Address for Service: FUJI PHOTO FILM CO., LTD. and TORA" INDUSTRIES, INCORPORATED 210 Nakanuma, Minami Ashigara-shi, Kanagawa, JAPAN and 4345 Mishima-shi, Shizuoka, JAPAN, respectively Seimi Satake; Yoshihiko Shibahara; Toshiaki Ueda and Kenji Kida GRIFFITH HACK CO.

71 YORK STREET SYDNEY NSW 2000

AUSTRALIA

Complete Specification for the invention entitled: PHOTOGRAPHIC LIGHT-SENSITIVE MATERIAL HAVING A POLYESTER FILM SUPPORT The following statement is a full description of this invention, including the best method of performing it known to me/us:- 9051A:rk "CI~

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PHOTOGRAPHIC LIGHT-SENSITIVE MATERIAL HAVING A POLYESTER FILM SUPPORT FIELD OF THE INVENTION This invention relates to a photographic lightsensitive material and, more particularly, to a photographic light-sensitive material which comprises a support of a polyester material and which has a light transparency and excellent curl-extinguishing properties 090: after development processing, and these properties are V0 g0 independent of environment with a lapse of time.

BACKGROUND OF THE INVENTION S* Photographic light-sensitive materials are 00 00« 0 0 generally produced by coating at least one photographic light-sensitive layer on a plastic film support. As the 0o*0 plastic film, fiber type polymers represented by a 0 o° °triacetyl cellulose (hereinafter abbreviated as "TAC") s and polyester type polymers represented by r.lyethylene terephthalate (hereinafter abbreviated as "PET") are generally used.

.0 PET has conventionally been considered to substitute for TAC due to its excellent productivity, mechanical strength and dimensional stability. In the rolled state widely employed for photographic lightsensitive materials, however, PET has a strong tendency to retain the curl from being in the rolled state, and hence its handling properties after development processing are so poor that the scope of its application has been limited in spite of the above-described excellent properties.

Photographic light-sensitive materials generally include sheet form types such as X-ray films, plate-making films and cut films and roll films. Typical examples of the roll films are color or black-and-white 0**0 o0 a° negative-wcrking films of 35 mm or less in width retained 0o e o, in a cartridge and adapted to be loaded in ordinary Scameras for taking photographs.

04 8 4 On the other hand, the greatest aspect as a photographic support of TAC films mainly used for roll films is that they are optically non-anisotropic and have t I, a high transparency. In addition, they have another excellent aspect. That is, they possess excellent properties as to curl-extinguishing after development processing. Since TAC films have comparatively high water-absorbing properties for plastic films due to their 11 molecular structure, the molecular chain is fluidized upon absorption of water during development processing and the curling tendency imparted by being kept in a rolled state as roll film for a long time is extinguished as a result of rearrangement of the molecular chain which 2 had been set after being rolled for a long time. With photographic light-sensitive materials using films which do not have the curling tendency-extinguishing properties of TAC films, however, there arise problems of, for example, flaw formation, unfocusing, and jamming upon conveying when used in a rolled state, for example, in the printing step of forming an image on a photographic printing paper after development.

Recently, acceleration of film-conveying speed 0o a upon photographing, enhancement of photographing magnification, and reduction in size of photographing o0:00 apparatuses have become remarkable. In such situations, o a supports for photographic light-sensitive materials are o 0 required to have enough strength, dimensional stability, a reduction in film thickness, etc., to meet these new ao advances.

However, the above-described TAC provides only a fragile film when formed into film due to its rigid molecular structure and cannot be used in for these o advances. Additionally, PET films cannot be used as a wroll film where the curling tendency is problematical, in spite of their excellent mechanical properties. Thus, considerable improvement in PET films is greatly desired.

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4 US Patents 4,217,441 and 4, 241,170 disclose that a PET film modified by reacting with a certain specific compound is employed as a support for a photographic material. In this case, however, there arise problems that the film becomes whitened by processing and a lapse of time, and the transparency of the film is diminished. Therefore, further improvements for the transparency of the film have been desired.

SUMMARY OF THE INVENTION Therefore, an embodiment of the present invention can provide a photographic light-sensitive material which comprises a polyester film support having a high transparency and excellent mechanical properties, and which has excellent curl-extinguishing properties after development processing.

Accordingly, the present invention provides a photographic light-sensitive material, which comprises a polyester film support having provided thereon at least one light-sensitive silver halide emulsion layer, said polyester film having a 15 haze of up to a water content of from 0.5 wt% to 5.0 wt%, a curlextinguishing ratio of 50% or more, and containing as predominant constituents a terephthalic acid component and a glycol component, said polyester film further comprising an aliphatic dicarboxylic acid component having 4 to 20 carbon atoms as a copolymerization component in an amount of from 3 to 25 mol% based on the 20 terephthalic acid component, wherein the haze is measured in accordance with ASTM D1003-52 after heat treatment of the film at a temperature of 150'C for minutes, the water content is measured after first moisture-conditioning the film under conditions of 23°C and 30% RH for three hours, next dipping the film in distilled water at 23 0 C for fifteen minutes and then measuring the water content using a micro-moisture meter at a drying temperature of 150°C, and the curlextinguishing ratio is measured after first dipping the film in distilled water at for fifteen minutes, and then drying for three minutes in air in a thermostatic chamber maintained at 55°C while applying a load of DETAILED DESCRIPTION OF THE INVENTION In the present invention, the water content of polyester film is measured by moisture-conditioning the film under the conditions of 23*C, 30% RH and three *hours.

402/20739A/9.8.91 dipping the film in 23 0 C distilled water for 15 minutes, and then using a micro-moisture meter (for example, model CA-02, made by Mitsubishi Chemical Industries, Ltd.) at a drying temperature of 150 0

C.

The polyester film in accordance with the present invention is characterized in that the water content measured in the above-described manner is not less than 0.5 wt% and preferably is from 0.6 to 5.0 wt%.

If the water content is less than 0.5 wt%, 0, curling tendency-extinguishing properties after Sdevelopment processing are not improved, whereas if the o water content is too large, dimensional stability is deteriorated due to absorption of moisture.

The polyester film of the present invention has a curl-extinguishing ratio of 50% or more and preferably 80% or more.

In the present invention, the term "polyester" means a polyester containing as predominant constituents an aromatic dibasic acid and a glycol. Typical examples o of the dibasic acid include terephthalic acid and isophthalic acid, and examples of the glycol include ethylene glycol, propylene glycol, butanediol, neopentyl glycol, 1,4-cyclohexanediol, diethylene glycol, etc. Of the polyester films comprising these components, polyethylene terephthalate (PET) is most convenient from the 5 standpoint of availability, and hence descriptions hereinafter will be made by reference to PET.

Copolymerized PET films preferably used in the present invention comprise copolymerized PET films containing a metal sulfonate-containing aromatic dicarboxylic acid component as a copolymerizable component.

Specific examples of the metal sulfonatecontaining aromatic dicarboxylic acid include D° sulfoisophthalic acid, 2-sodium sulfoterephthalic acid, 0o 0> 4-sodium sulfophthalic acid, 4-sodium sulfo-2,6- Snaphthalenedicarboxylic acid and compounds wherein oo0o00." 00 sodium of the above-described compounds is replaced by another metal (for example, potassium or lithium). The copolymerization proportion of the metal sulfonate- 0 containing aromatic dicarboxylic acid component is preferably about 2 to 15 mol%, particularly preferably a 0 about 4 to 10 mol%, based on the aromatic dibasic acid component, the terephthalic acid component.

0 0" Copolymerization of an aliphatic dicarboxylic 0. acid component containing 4 to 20 carbon atoms in the copolymerized PET film is preferable in view of transparency, particularly depression of whitening and enhancement of bending resistance of the copolymerized PET film.

6 I C As specific examples of the aliphatic dicarboxylic acid component containing 4 to 20 carbon atoms, there are illustrated succinic acid, adipic acid, sebacic acid, etc., with adipic acid being particularly preferable. The copolymerization proportion of the aliphatic dicarboxylic acid component containing 4 to carbon atoms is preferably about 3 to 25 mol%, particularly preferably about 5 to 20 mol%, based on the terephthalic acid component.

e Additionally, in the polyester film of the present invention, other acid components or glycol components may further be copolymerized in a small 't proportion so as not to inhibit transparency and mechanical properties. For example, polyalkylene glycol, particularly polyethylene glycol, may be copolymerized in a proportion of 0 to 10 wt% based on the amount of the polyester produced. The polyalkylene glycols to be used for the above-described objects preferably have a molecular weight of about 600 to 10,000. The polyester *a o f Sfilm of the present invention preferably comprises a polymer having an intrinsic viscosity of about 0.5 to 0.9 measured in o-chlorophenol at 25 0

C.

Further, various additives may be incorporated in the polyester film of the present invention.

In using a polyester film as a support for a photographic 7

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light-sensitive material, one of the problems is a problem of light piping due to a high refractive index of the support. As photographic supports, there are generally used triacetyl cellulose (TAC) and polyester type polymers represented by PET. One of the great optical differences between TAC and PET is the refractive index. PET has a refractive index of about 1.6, whereas TAC has a smaller refractive index of 1.5. On the other hand, gelatin mainly used in the subbing layer and 9 photographic emulsion layer has a refractive index of 00 00r O 1.50 to 1.55. Thus, the ratio of the refractive index of 0000 gelatin to that of PET is 1.5/1.6, which is smaller than ,0 00 1. Therefore, when light streams through a film edge, the light is liable to be reflected at the interface o.o between the base and emulsion layer, thus polyester type 0. films are liable to cause so-called light piping.

As techniques for avoiding the light piping phenomenon, there are known, for example, a technique of incorporating inert inorganic particles or the like in 0 0 the film and a technique of adding a dye. A technique of 0 preventing light piping preferably employed in the present invention is the technique of adding a dye which does not seriously raise film haze.

8 Dyes to be used for dyeing film are not particularly limited, but the tone is preferably gray in view of the general properties of light-sensitive materials. Dyes to be employed are preferably those which have an excellent heat resistance in a temperature region where polyester film is formed and have an excellent compatibility with polyester.

From the above-described point of view, dyes commercially available as dyes for polyesters such as Diaresin made by Mitsubishi Chemical Industries, Ltd. and 0 o Kayaset made by Nippon Kayaku K.K. may be used for 100( o0O attaining the above-described object.

o oAs to dyeing density, at least a color density in the visible region of 0.01 measured by a color oo densitometer made by Macbeth Co. is necessary, with 0.03 o or more being more preferable.

0 To the polyester film in accordance with the present invention may be imparted lubricating properties as the application demands. There are no limits as to 8o *O techniques for imparting lubricating properties, but a 4technique of kneading an inert inorganic compound into the film or a technique of coating a surfactant is employed in general.

9 The inert inorganic particles are illustrated by SiO 2 TiO 2 BaSO 4 CaC0 3 talc, kaolin, etc. In addition, a technique of adding the inert particles to the polyester-synthesizing reaction system to impart lubricating properties by the external particle system and a technique of precipitating catalyst or the likhaving been added upon the polymerization reaction of polyester to impart lubricating properties by the internal particle system are also employable.

e0a a Since transparency is an important factor as a *o rr a support for photographic light-sensitive materials, SiO 2 eeLi a having a comparatively approximate refractive index to a4.at A 4 that of polyester film is preferably selected as the external particle system, or an internal particle system capable of precipitating particles of a comparatively a at small particle size is preferably selected as the internal particle system, which, however, do not limit the technique of imparting lubricating properties.

Further, in the case of imparting lubricating I: a properties by the kneading technique, it is also prefer- I able to laminate a layer which functions to impart transparency to the film. As the technique for lamination, there is illustrated a coextruding process using a plurality of extruders and a feed block or multi-manifold die.

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In the present invention, precipitation of lowpolymerized product upon thermal treatment for forming a subbing layer sometimes takes place with some copolymerization ratio. In such a situation, it is possible to laminate a ordiay polyester layer on at least one side of the support. For this lamination, too, the coextruding process is employed as an effective technique.

Starting polymers for the copolymerized PET film of the present invention can be synthesized according to conventionally known processes for producing polyesters. For example, copolymerized PET can be

I

4tc~ obtained by directly subjecting the dibasic acid I component and the glycol component to an esterification reaction at a temperature of about 200'C to 270'C and removing a theoretical amount of water or, by using a lower alkyl ester as the dibasic acid component, and conducting an ester interchange reaction between the dibasic acid component and the glycol component at a temperature of about 1000C to 250 0 C and removing a theoretical amount of lower alcohol to obtain a glycol ester of the dibasic acid or a low molecular weight polymer. Then, the product obtained is heated at a temperature of about 2000C to 3000C under a pressure gradually reduced to about 1 Torr to remove excess glycol component. In this situation, an ester interchange 11 reaction catalyst or a polymerization reaction catalyst described in U.S. Patents 2,647,885 and 2,739,957, British Patents 742,196 and 770,531 may be used, or a heat resistant stabilizing agent described in the above patents may be added thereto.

The thus-obtained copolymerized PET is generally granulated, dried, melt-extruded to form an unstretched film sheet, then biaxially stretched and heat-treated to obtain the end film.

9 The biaxial stretching may be conducted successively in the order of longitudinal direction and transverse direction or in the reverse order, or simultaneously in two directions. The stretching ratio is not particularly limited, but is usually 2.0 to 5.0 times.

,V Restretching in the transverse or longitudinal direction f. may be conducted after stretching in the transverse or longitudinal direction.

As a drying technique in the present invention employed before melt-extrusion, a vacuum drying technique or a dehumidification-drying technique is preferable.

4Stretching temperatures in the present invention are desirably from 70 to 100C upon longitudinal stretching and from 80 to 1601C upon try.nsverse stretching.

Heat-setting temperatures are from 150 to 2100C, particularly preferably from 60 to 200 0

C.

12- The thickness of the copolymerized PET film to be used in the present invention may properly be determined depending upon the end-use of photographic film, and is desirably from 25 to 250 gm, more desirably from 40 to 150 gm.

The copolymerization formulation of the present invention does not spoil the excellent transparency and mechanical strength which PET essentially possesses, and provides a film haze of up to a breaking strength of Som2 o from 8 to 25 kg/mm an initial modulus of from 200 to o o 0m S°500 kg/mm and a tear strength at a thickness of 120 pm 0 of not less than 30 g. If the strength is less than the a o above-described range, the excellent mechanical strength which PET essentially possesses is spoiled and, thus, the superiority over TAC is lost.

00 o 0 In the present invention, transparency, breaking strength, initial modulus and tear strength are o0 n0 0 measured as follows.

Transparency oa 0r So oHaze of a film is measured according to ASTM o D1003-52 after a heat treatment of the film at a temperature of 150 0 C for 10 minutes. This heat treatment is usually subjected to a film support at a coating step of a photographic layer.

13 2 Breaking Strength and Initial Modulus A sample of 10 mm in width and 100 mm in length is subjected to measurement according to JIS Z1702-1976 employing a pulling rate of 300 mm/min for measuring breaking strength and 20 mm/min for measuring initial modulus.

The polyester film support of the present invention is characterized in its excellent curling tendencyextinguishing properties after development processing (hereinafter referred to as curl-extinguishing ratio).

In the present invention, the curl-extinguishing ratio measured according to the following method is preferably 4 50% or more, particularly preferably 80% or more.

Measurement of Curl-Extinguishing Ratio A sample of 12 cm x 35 cm in size is wound r ,around a core of 10 mm in diameter and is kept under the conditions of 60 0 C x 30% RH x 72 hrs. Then, it is t 4 i t unwound from the core, dipped in 40 0 C distilled water for minutes, and dried for 3 minutes in a 55 0 C air thermo- 4 4 #4 9 44 14

A

static chamber while applying a load of 50 g. The length of the thus-treated sample is measured in a perpendicularly suspended state to evaluate the degree of restoration to the original length of 12 cm.

The copolymerized PET film to be used in the present invention has a better adhesiveness to various coating layers such as emulsion layers than conventional PET films.

The polyester film of the present invention may, if

DOD*

P necessary, be previously subjected to corona discharge treatment, treatment with a chemical solution or flame treatment. Of these surface treatments, corona discharge treatment is most preferably used in the present invention, since it causes less precipitation of lowo polymerized product on the film surface.

oo The polyester support of the present invention preferably has a subbing layer for enhancing adhesion to *0 00 a photographic layer such as a light-sensitive layer to be coated thereon.

Co 0 Sb As the subbing layer, there are illustrated a S subbing layer using a polymer latex composed of a styrene-butadiene type copolymer or a vinylidene chloride copolymer and a subbing layer using a hydrophilic binder such as gelatin.

15 The subbing layer using a hydrophilic binder is preferably used as the subbing layer in the present invention.

As the hydrophilic binder to be used in the present invention, there are illustrated, for example, water-soluble polymers, cellulose esters, latex polymers and water-soluble polyesters. The water-soluble polymers include gelatin, gelatin derivatives, casein, agar-agar, sodium alginate, starch, polyvinyl alcohol, polyacrylic acid copolymers and maleic anhydride copolymers, and the Scellulose esters include carboxymethyl cellulose and 0 o hydroxyethyl cellulose. The latex polymers include vinyl a o !o o chloride-containing copolymers, vinylidene chloridecontaining copolymers, acrylic ester-containing .op copolymers, vinyl acetate-containing copolymers and oO butadiene-containing copolymers. Of these, gelatin is most preferable.

As compounds capable of swelling the support to be used in the present invention, there are illustrated, Sfor example, resorcin, chlororesorcin, methylresorcin, oo cresol, m-cresol, p-cresol, phenol, o-chlorophenol, pchlorophenol, dichlorophenol, trichlorophenol, monochloroacetic acid, dichloroacetic acid, trifluoroacetic acid, and chloral hydrate. Of these, resorcin and pchlorophenol are preferable.

16 I Various gelatin hardeners may be used in the subbing layer of the present invention.

As the gelatin hardeners, there are illustrated, for example, chromium salts chromium alum), aldehydes formaldehyde and glutaraldehyde), isocyanates, active halogen compounds 2,4dichloro-6-hydroxy-s-triazine) and epichlorohydrin resin.

The subbing layer of the present invention may contain fine particles of an inorganic substance such as R SiO 2 or TiO 2 or fine particles (1 to 10 am) of polymethyl 0 0 methacrylate copolymer as matting agents.

The subbing layer of the present invention may a a be coated according to a generally well known coating process such as a dip coating process, an air knife ,-o0 coating process, a curtain coating process, a wire bar coating process, a gravure coating process, or an extrusion coating process.

The light-sensitive material of the present invention may have light-insensitive layers such as an 6 antihalation layer, an interlayer, a backing layer and a n* surface protecting layer in addition to light-sensitive layers.

The binder for the backing layer may be a hydrophobic polymer, or may be a hydrophilic polymer as used for the subbing layer.

17 r t i The backing layer of the light-sensitive material in accordance with the present invention may contain an antistatic agent, a slipping agent, a matting agent, a surfactant, a dye, etc. The antistatic agents to be used in the present invention are not particularly limited and are, for example, anionic high molecular weight electrolytes such as high molecular weight polymers containing carboxylic acid groups, carboxylic acid salt groups or sulfonic acid groups high S polymers as described in JP-A-48-22017 (the term "JP-A" as used herein refers to a "published unexamined Japanese patent application"), JP-B-46-24159 (the term "JP-B" as used herein refers to an "examined Japanese patent publication"), JP-A-51-30725, JP-A-51-129216, JP-A-55-95942) and oO cationic high polymers as described in JP-A-49-121523, JP-A-48-91165, JP-B-49-24582, etc. Ionic surfactants also include anionic and cationic surfactants and are exemplified by those which are described in JP-A-49- 85826, JP-A-49-33630, U.S. Patents 2,992,108 and I 3,206,312, JP-A-48-87826, JP-B-49-11567, JP-B-49-11568, 0 JP-A-55-70837, etc.

The most preferable antistatic agents for the backing layer of the present invention are fine particles of at least one crystalline metal oxide selected from among ZnO, TiO 2 SnO 2 A1 2 0 3 In 2 0 3 SiO 2 MgO, BaO and MoO 3 or a composite oxide thereof.

18 Fine particles of the conductive crystalline oxides or their composite oxides to be used in the present invention have a volume resistivity of up to 107 f.cm, more preferably up to 105 2.cm, and have a particle size of 0.01 to 0.7 im, particularly preferably 0.02 to 0.5 pm.

Processes for producing the fine particles of the conductive crystalline metal oxides or their composite oxides to be used in the present invention are described in detail in JP-A-56-143430 (corresponding to U.S. Patent 4,495,276) and JP-A-60-258541. They can be l l easily produced firstly by producing fine particles of metal oxide through baking and heat-treating the i i particles in the presence of a different atom capable of improving conductivity; secondly by allowing a different metal capable of improving conductivity to coexist upon production of metal oxide fine particles through bakinj; Sor thirdly by reducing the oxygen concentration of the atmosphere upon production of metal oxide fine particles

S**

1 through baking to thereby introduce an oxygen 44 a deficiency. Examples of different atoms are: Al, In, etc., for ZnO; Nb, Ta, etc., for Ti0 2 and Sb, Nb, halogen atoms, etc., for SnO 2 The different atom is added in an amount of preferably 0.01 to 30 mol%, particularly preferably 0.1 to 10 mol%.

19 Photographic layers of the photographic lightsensitive material for the present invention are now described below. The most preferable examples of the photographic light-sensitive material in accordance with the present invention are silver halide photographic light-sensitive materials which are exemplified by silver halide color negative-working films, color positiveworking films, color reversal films and black-and-white negative-working films.

o 7 The photographic emulsion to be used in the 00 03 a present invention can be prepared by the processes a oO- described in P. Glafkides, Chimie et Physique Photooo o' graphique (Paul Montel, 1967), G.F. Duffin, Photographic t 0 o i Emulsion Chemistry (The Focal Press, 1966), V.L. Zelikman 0, 1 et al., Making and Coating Photographic Emulsion (The Son) Focal Press, 1964), etc. That is, any of an acidic process, a neutral process and an ammoniacal process may 0 be used. As a manner of reacting a soluble silver salt with a soluble halide salt, any of one side mixing, Sa simultaneous mixing, and combinations thereof may be oa employed.

A process of forming silver halide grains in the presence of excess silver ion (called reverse mixing process) can be employed as well. As one type of the simultaneous mixing, a process called a controlled double 20

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1 i I F- i ~3 -i m 7 0 01 d 0 00 0 0 0 00 o o 0 )00 0 0 00 0o o 00 0 0s 0 0 jet process wherein the pAg in a liquid phase in which silver halide is formed is kept constant can be employed.

This process provides a silver halide emulsion containing silver halide grains of regular crystal form having an approximately uniform grain size.

Two or more silver halide emulsions having been separately prepared may be mixed for use.

During formation or physical ripening of silver halide grains, cadmium salts, zinc salts, lead salts, thallium salts, iridium salts or the complex salts thereof, rhodium salts or the complex salts thereof, iron salts or the complex salts thereof, etc., may be allowed to coexist.

As a binder or protective colloid for photographic emulsions, gelatin is advantageously used.

However, other hydrophilic colloids can be used as well.

For example, proteins such as gelatin derivatives, graft polymers between gelatin and other high molecular weight polymers, albumin, casein, etc.; cellulose derivatives such as hydroxyethyl cellulose, carboxymethyl cellulose, cellulose sulfate, etc.; sugar derivatives such as sodium alginate, starch derivative, etc.; and various synthetic macromolecular substances such as homopolymers or copciymers polyvinyl alcohol, partially acetalized polyvinyl alcohol, poly-N-vinyl pyrrolidone, 21 polyacrylic acid, polymethacrylic acid, polyacrylamide, polyvinyl imidazole, polyvinyl pyrazole, etc.) can be used.

As gelatin, acid-processed gelatin or enzymeprocessed gelatin as described in Bull. Soc. Sci. Phot.

Japan, No. 16, p. 30 (1966) may be used as well as limeprocessed gelatin, and a gelatin hydrolyzate or an enzyme-decomposed product can also be used. As gelatin derivatives, those obtained by reacting gelatin with various compounds such as acid halides, acid anhydrides, °I 0 isocyanates, bromoacetic acid, alkanesultones, vinyl- S, sulfonamides, maleimide compounds, polyalkylene oxides, "epoxy compounds or the like can be used. Specific examples thereof are described in U.S. Patents 2,614,928, 3,123,945, 3,186,846, 3,312,553, British Patents 861,414, 1,033,189, and 1,005,784, JP-B-42-26845, etc.

As the aforesaid gelatin graft polymers, products prepared by grafting to gelatin a homo- or copolymer of a vinyl monomer such as acrylic acid, methacrylic acid, esters or amides thereof, acrylonitrile, styrene or the like can be used. In particular, graft polymers between gelatin and a polymer having some compatibility with gelatin such as a polymer of acrylic acid, methacrylic acid, acrylamide, methacrylamide, hydroxyalkyl methacrylate or the like are preferable.

22 S000 00 o oa a Sa o e o0 a o0 0 0 Q 0 0 So 0 0 00 a oo a 00 00 0 0 a o 0 00 Examples of these are described in U.S. Patents 2,763,625, 2,831,767, 2,956,884, etc.

Typical synthetic high molecular weight substances are those described in, for example, West German OLS 2,312,708, U.S. Patents 3,620,751 and 3,879,205 and JP-B-43-7561.

In the photographic emulsion to be used in the present invention, various compounds for preventing fog or stabilizing the photographic properties during production steps, storage, or photographic processing of the light-sensitive material may be incorporated. That is, many compounds known as antifogging or stabilizing agents such as azoles benzothiazolium salts, nitroindazoles, nitrobenzimidazoles, chlorobenzimidazoles, bromobenzimidazoles, mercaptothiazoles, mercaptobenzothiazoles, mercaptobenzimidazoles, mercaptothiadiazoles, aminotriazoles, benzotriazoles, nitrobenzotriazoles, mercaptotetrazoles (particularly, mercaptotetrazole), etc.); mercaptopyrimidines; mercaptotriazines; thioketo compounds oxazolinethione, etc.); azaindenes triazaindenes, tetraazaindenes (particularly, 4-hydroxy-substituted 1,3,3a,7-tetraazaindenes, etc.); pentaazaindenes, etc.); benzenethiosulfonic acid; benzenesulfinic acid; benzenesulfonamide; etc., may be added. For example, those described in U.S.

23 Patents 3,954,474 and 3,982,947, JP-B-52-28660, etc., may be used.

The photographic emulsion layer of the photographic light-sensitive material in accordance with the present invention may contain a polyalkylene oxide or its ether, ester or amide derivative, a thioether compound, a thiomorpholine, a quaternary ammonium salt compound, a urethane derivative, a urea derivative, an imidazole derivative, a 3-pyrazolidone, etc., for the purpose of S"°0 enhancing sensitivity or contrast or for accelerating development. For example, those described in U.S.

Boo>' Patents 2,400,532, 2,423,549, 2,716,062, 3,617,280, 0 3,772,021 and 3,808,003, British patent 1,488,991, etc., 00oo 0 may be used.

The photographic emulsion used in the present 00 0 invention may be spectrally sensitized with methine dyes, or the like. Suitable dyes include cyanine dyes, 0 merocyanine dyes, complex cyanine dyes, complex merocyanine dyes, holopolar cyanine dyes, hemicyanine :0*o dyes, styryl dyes, hemioxonol dyes, etc. Particularly o useful dyes are those-belonging to cyanine dyes, merocyanine dyes, and complex merocyanine dyes. These dyes may contain as a basic heterocyclic nucleus any of the nuclei usually used for cyanine dyes.

24 S. 2 That is, there can be contained a pyrroline nucleus, an oxazoline nucleus, a thiazoline nucleus, a pyrrole nucleus, an oxazole nucleus, a thiazole nucleus, a selenazole nucleus, an imidazole nucleus, a tetrazole nucleus, a pyridine nucleus, etc.; nuclei wherein an 0000 00 0 @0 a 4 0o 0a 4 0 0 o~ 0 44 0 0 00 OI 4 04 4 I~0 *a 0 0 10' alicyclic hydrocarbon ring or rings are fused to these nuclei; and nuclei wherein an aromatic hydrocarbon ring or rings are fused to these nuclei, an indolenine nucleus, a benzindolenine nucleus, an indole nucleus, a benzoxazole nucleus, a naphthoxazole nucleus, a benzothiazole nucleus, a naphthothiazole nucleus, a benzoselenazole nucleus, a benzimidazole nucleus, a quinoline nucleus, etc. These nuclei may be substituted on the carbon atom or atoms thereof.

Merocyanine dyes or complex merocyanine dyes contain, as a ketomethylene structure-containing nucleus, a 5- or 6-membered heterocyclic nucleus such as a nucleus, a thiohydantoin nucleus, a 2thiooxazolidine-2,4-dione nucleus, a thiazolidine-2,4dione nucleus, a rhodanine nucleus, a thiobarbituric acid nucleus, or the like.

Useful sensitizing dyes are described in, for example, German Patent 929,080, U.S. Patents 2,231,658, 2,493,748, 2,503,776, 2,519,001, 2,912,329, 3,656,959, 3,672,897, 3,694,217, 4,025,349, 4,046,572, British Patent 1,242,588, JP-B-44-14030 and JP-B-52-24844.

25 ii. I I 4404 4 .5 45 a j O 0 a a 0 4*5 o O a a :5 a 4n 4 a 441 These sensitizing dyes may be used alone or in combination. Combinations of sensitizing dyes are often used for attaining, in particular, supersensitization.

Typical examples thereof are described in U.S. Patents 2,688,545, 2,977,229, 3,397,060, 3,522,052, 3,527,641, 3,617,293, 3,628,964, 3,666,480, 3,672,898, 3,679,428, 3,703,377, 3,769,301, 3,814,609, 3,837,862, 4,026,707, British Patents 1,344,281 and 1,507,803, JP-B-43-4936, JP-B-53-12375, JP-A-52-110618, and JP-A-52-109925.

Dyes which themselves do not show a spectrally sensitizing action or materials which do not substantially absorb visible light, showing supersensitivity, may be incorporated in the emulsion together with the sensitizing dyes. For example, aminostilbenes substituted by a nitrogen-containing heterocyclic group (2or example, those described in U.S. Patents 2,933,390 and 3,635,721), aromatic organic acid-formaldehyde condensates (for example, those described in U.S. Patent 3,743,510), cadmium salts, azaindene compounds, etc., may be incorporated. Combinations described in U.S. Patents 3,615,613, 3,615,641, 3,617,295, 3,635,721 are particularly useful.

The light-sensitive material of the present invention may contain water-soluble dyes as filter dyes or for various purposes like antiirradiation. Such dyes include oxonol dyes, hemioxonol dyes, styryl dyes, 26 i U i merocyanine dyes, cyanine dyes, and azo dyes. Of these, oxonol dyes, hemioxonol dyes, and merocyanine dyes are useful. Specific examples of usable dyes are described in British Patents 584,609 and 1,177,429, JP-A-48-85130, JP-A-49-99620, JP-A-49-114420, JP-A-52-108115, U.S.

Patents 2,274,782, 2,533,472, 2,956,879, 3,148,187, 3,177,078, 3,247,127, 3,540,887, 3,575,704, 3,653,905, 3,718,472, 4,071,312, and 4,070,352.

In the light-sensitive material obtained according to the present invention, photographic emulsion .layers and other hydrophilic colloidal layers may contain fluorescent brightening agents of stilbenes, triazines, oxazoles, coumarins, etc. These agents may be of a water-soluble type or water-insoluble type, with the latter being used in the form of a dispersion. Specific examples of the fluorescent brightening agents are O"tt described in U.S. Patents 2,632,701, 3,269,840, 44 e4 S2' 3,359,102, British Patents 852,075 and 1,319,763.

In the practice of the present invention, the following known dye stabilizers can be used in combination. The color image stabilizing agents to be used in the present invention may be used alone or in combinations of two or more. The known dye stabilizers include, for example, hydroquinone derivatives described in U.S.

Patents 2,360,290, 2,418,613, 2,675,314, 2,701,197, 27

A

_1_Llii I: _I

L

2,704,713, 2,728,659, 2,732,300, 2,735,765, 2,710,801, 2,816,028, British Patent 1,.63,921, etc., gallic acid derivatives described in U.S. Patents 3,457,079, 3,069,262, etc., p-alkoxyphenols described in U.S.

Patents 2,735,765 and 3,698,909, JP-B-49-20977, JP-B-52-6623, etc., p-hydroxyphenols described in U.S.

Patents 3,432,300, 3,573,050, 3,574,627, 3,764,337, JP-A-52-35633, JP-A-52-147434, JP-A-52-152225, etc., bisphenols described in U.S. Patent 3,700,455, and the like.

:U 0 oThe light-sensitive material prepared by the present invention may contain hydroquinone derivatives, aminophenol derivatives, gallic acid derivatives, Sascorbic acid derivatives, etc., as color fog preventing agents. Specific examples thereof are described in U.S.

Patents 2,360,290, 2,336,327, 2,403,721, 2,418,613, 2,675,314, 2,701,197, 2,704,713, 2,728,659, 2,732,300, 2,735,765, JP-A-50-92988, JP-A-50-92989, 93928, JP-A-50-110337, JP-A-52-146235, JP-B-50-23813, etc.

a The present invention may be applied to a multilayered multicolor photographic material having at least two light-sensitive layers different in spectral sensitivity. Multilayered color photographic materials usually comprise a support having provided thereon at 28 least one red-sensitive emulsion layer, at least one green-sensitive emulsion layer and at least one bluesensitive emulsion layer. The order of these layers may be optionalll selected as the case demands. Usually, the red-sensitive emulsion layer is associated with a cyanforming coupler, the green-sensitive emulsion layer is associated with a magenta-forming coupler, and the bluesensitive emulsion layer is associated with a yellowforming coupler, though different combinations are possible in some cases.

l [The most preferable light-sensitive materials of the present invention are rolled color negative films for photographing use.

Known color couplers may preferably be used in the color negative-working films of the present invention.

That is, they may contain compounds capable of 4 forming dyes by the reaction with an oxidation product of an aromatic amine (usually primary amine) developing Z" agent (hereinafter abbreviated as "couplers"). As the T" couplers, nondiffusible couplers having a hydrophobic group called a ballast group in the molecule are desirable. The couplers may be of either 4-equivalent type or 2-equivalent type based on silver ion. Colored couplers having color-correcting effects or couplers 29capable of releasing a development inhibitor upon development (called DIR couplers) may also be incorporated. Couplers may be those which form a colorless coupling reaction product.

As yellow color-forming couplers, known open chain ketomethylene couplers may be used. Of these, benzoylacetanilide type and pivaloylacetanilide type compounds are advantageous. Specific examples of usable yellow color-forming couplers are those described in U.S.

Patents 2,875,057, 3,265,506, 3,408,194, 3,551,155, 3,582,322, 3,725,072, 3,891,445, West German Patent 1,547,868, West German Patents (OLS) 2,219,917, 2,261,361, 2,414,006, British patent 1,425,020, JP-B-51- 10783, JP-A-47-26133, JP-A-48-73147, JP-A-51-102636,

JP-

A-50-6341, JP-A-50-123342, JP-A-50-130442, JP-A-51-21827, SJP-A-50-87650, JP-A-52-82424, JP-A-52-115219, etc.

As magenta color-forming couplers, pyrazolone

S.

fl t type compounds, indazolone type compounds, cyanoacetyl compounds, etc., may be used, with pyrazolone type compounds being particularly advantageous. Specific examples of usable magenta color-forming couplers are described in U.S. Patents 2,600,788, 2,983,608, 3,062,653, 3,127,269, 3,311,476, 3,419,391, 3,519,429, 3,558,319, 3,582,322, 3,615,506, 3,834,908, 3,891,445, West German :atent 1,810,464, West German patents (OLS) 30 a aaa a a a 'a aa *5 a a a a SD a a S 555* a ass..

a S *a as a a

I

.55.

a 0 a a. a~ sq 5 a a 5* a. as a a a a a 5.5 *5 as a a S '1 aa a a 2,408,665, 2,417,945, 2,418,959, 2,424,467, JP-B-40-6031, JP-A-51-20826, JP-A-52-58922, JP-A-49-129538, JP-A-49- 74027, JP-A-50-159336, JP-A-52-42121, JP-A-49-74028, JP-A-50-60233, JP-A-51-26541, JP-A-53-55122, etc.

As cyan color-forming couplers, phenolic compounds, naphtholic compounds, etc., may be used.

Specific examples thereof are those described in U.S.

Patents 2,369,929, 2,434,272, 2,474,293, 2,521,908, 2,895,826, 3,034,892, 3,311,476, 3,458,315, 3,476,563, 3,583,971, 3,591,383, 3,767,411, 4,004,929, West German patents (OLS) 2,414,830 and 2,454,329, JP-A-48--59838, JP-A-51-26034, JP-A-48-5055, JP-A-51-146828, JP-A-52- 69624, JP-A-52-90932, etc.

As colored couplers, those which are described in, for example, U.S. Patents 3,476,560, 2,521,903, 3,034,892, JP-B-44-2016, JP-B-38-22335, JP-B-42-11304, JP-B-44-32461, JP-A-51-26034, JP-A-52-42121, West German Patent (OLS) 2,418,959, etc., may be used.

As DIR couplers, those which are described in, for example, U.S. Patents 3,227,554, 3,617,291, 3,701,783, 3,790,384, 3,632,345, West German patents (OLS) 2,414,006, 2,454,301, 2,454,329, British Patent 953,454, JP-A-52-69624, JP-A--49-122335, JP-B-51-16141, etc., may be used.

31 C~ Compounds capable of releasing a development inhibitor upon development may be incorporated in the light-sensitive material in addition to the DIR couplers, and those described in, for example, U.S. Patents 3,297,445, 3,379,529, West German Patent (OLS) 241,794, JP-A-52-15271, JP-A-53-9116, etc., may be used.

The above-described couplers may be used in combinations.of two or more in one and the same layer, or the same compound may be used in two or more different layers.

These couplers are added to a photographic 3 i rt emulsion layer in an amount of 2 x 10- mol to 5 x mol, preferably 1 x 10 2 mol to 5 x 10 1 mol, per mol of silver contained in the emulsion layer.

The couplers can be introduced into silver halide emulsion layers in a known manner described in, for example, U.S. Patent 2,322,027. For example, they are dissolved in an alkyl phthalate dibutyl phthalate or dioctyl phthalate), a phosphoric ester diphenyl phosphate, triphenyl phosphate, tricresyl I phosphate, dioctylbutyl phosphate), a citric acid ester tributyl acetylcitrate), a benzoic acid ester octyl benzoate), an alkylamide diethyllaurylamide), a fatty acid ester dibutoxyethyl succinate or dioctyl azelate) or in an organic solvent 32 i having a boiling point of about 30°C to about 150 0 C such as a lower alkyl acetate ethyl acetate or butyl acetate), ethyl propionate, sec-butyl alcohol, methyl isobutyl ketone, p-ethoxyethyl acetate, methyl cellosolve or the like, and the resulting solution is dispersed in a hydrophilic colloid. The above-described high boiling organic solvent and the low boiling organic solvent may be mixed for use.

A dispersing process using a polymer as described in JP-B-51-39853 and JP-A-51-59943 may also be employed.

With couplers having an acid group such as a carboxylic acid or a sulfonic acid group, they are introduced into a hydrophilic colloid as an alkaline aqueous solution.

I i The light-sensitive material prepared according to the present invention may contain in its hydrophilic colloidal layer an ultraviolet ray absorbent. For example, aryl group-substituted benzotriazole compounds

I,

1 those described in U.S. Patent 3,533,794), 4o thiazolidone compounds those described in U.S.

Patents 3,314,794 and 3,352,681), benzophenone compounds those described in JP-A-46-2784), cinnamic acid esters those described in U.S. Patents 3,705,805 and 3,707,375), butadiene compounds those -33 described in U.S. Patent 4,045,229) or benzoxazole compounds those described in U.S. Patent 3,700,455) may be used. Further, those which are described in U.S. Patent 3,499,762 and JP-A-54-48535 may be used. Ultraviolet ray-absorbing couplers anaphtholic cyan dye-forming couplers) or ultraviolet rayabsorbing polymers may also be used. These ultraviolet ray-absorbing agents may be mordanted to a specific layer or layers.

"o In photographic processing of the light- 0 9 0 sensitive material of the present invention, any of known ot 0 processes may be used. The processing temperature is usually selected between 18 0 C and 50 0 C. However, temper- 9 a atures lower than 180C or higher than 50°C may be employed.

Either of development processing forming only silver images (black-and-white photographic processing) Qb ~or color photographic processing comprising dye imageforming development processing may be used depending upon ae the end use.

Color developer generally comprises an alkaline 0 oa aqueous solution containing a color developing agent. As the color developing agent, known primary aromatic amines such as phenylenediamines (for example, 4-amino-N,Ndiethylaniline, 3-methyl-4-amino-N,N-diethylaniline, 4- 34 ft I amino-N-ethyl-N--hydroxyethylaniline, 3-methyl-4-amino- N-ethyl-N-P-hydroxyethylaniline, 3-methyl-4-amino-Nethyl-N-p-methanesulfonamidoethylaniline, 4-amino-3methyl-N-ethyl-N-P-methoxyethylaniline, etc.) may be used.

In addition, those described in L.F.A. Mason, Photographic Processing Chemistry (Focal Press, 1966), pp. 226 to 229, U.S. Patents 2,193,015, 2,592,364, JP-A-48-64933, etc., may also be used.

S' The color developer may further contain pH buffers such as alkali metal sulfites, carbonates, borates and phosphates, development inhibitors or antifoggants such as bromides, iodides and organic antifoggants and, if necessary, may contain water softeners, preservatives such as hydroxylamine, organic solvents such as benzyl alcohol and diethylene glycol, development accelerators such as polyethylene glycol, quaternary ammonium salts, and amines, dye-forming couplers, competitive couplers, fogging agents such as sodium Sborohydride, auxiliary developing agents such as l-phenyl-3-pyrazolidone, viscosity-imparting agent, polycarboxylic acid type chelating agents described in U.S. Patent 4,083,723, antioxidants described in West German Patent (OLS) 2,622,950, and the like.

35 r i- r S. Color developed photographic emulsion layers are usually bleached. Bleaching may be conducted separately or simultaneously with fixing. As bleaching agents, compounds of polyvalent metals such as iron(III), cobalt(III), chromium(VI), copper(II), etc., peracids, quinones, nitroso compounds, etc., are used. For example, ferricyanides, dichromates, organic complex salts of iron(III) or cobalt(III) such as complex salts of aminopolycarboxylic acids ethylenediaminetetra- 0 o acetic acid, nitrilotriacetic acid, 1,3-diamino-2propanoltetraacetic acid) or organic acids citric Sacid, tartaric acid, malic acid, etc.); persulfates and permanganates; nitrosophenol; etc., may be used.

Couplers of the present invention show a large colorforming ability even in a bleaching solution or bleachfixing solution containing iron(III) sodium ethylenediaminetetraacetate or iron(III) ammonium ethylenediaminetetraacetate, thus being advantageous in this point as well. Iron(III) ethylenediaminetetraacetate complex salts are useful in both an independent bleaching solution and a monobath bleach-fixing solution.

To the bleaching or bleach-fixing solution may be added various additives such as bleaching accelerators described in U.S. Patents 3,042,520, 3,241,966, 8506, JP-B-45-8836, etc., and thiol compounds described in JP-A-53-65732.

-36 i The present invention is now illustrated in greater detail by refdrence to the following examples which, however, are not to be construed as limiting the present invention in any way. Unless otherwise specified, all percents, ratios, etc., are by weight.

EXAMPLE 1 Preparation of Polyester Film 0.1 Part by "weight of calcium acetate monot It S' hydrate and 0.03 part by weight of antimony trioxide were added to 100 parts by weight of dimethyl terephthalate, parts by weight of ethylene glycol, 10 parts by weight 9 t of dimethyl 5-sodium sulfoisophthalate and 10 parts by weight of dimethyl adipate in a reactor equipped with a fractionating column, and an ester interchange reaction t.

was conducted by gradually heating and removing methanol produced. After the temperature was reached to 230 0

C,

the reaction was continued at this temperature until 38 parts by weight of methanol was distilled out.

0.05 Part by weight of trimethyl phosphate was added to S'the resulting product, and the mixture was transferred to a reactor equipped with a pressure-diminishing device and the temperature was gradually raised and the pressure was gradually reduced to finally 280 0 C and not more than 1 mm Hg, respectively, to conduct polymerization. Thus, copolymerized PET was obtained after the lapse of 3 hours 37 from the start of the reduction of pressure. The intrinsic viscosity of the copolymerized PET was 0.65 measured in o-chlorophenol at 25 0

C.

The resulting copolymerized PET was dried at 130 0 C for 5 hours, then melt-extruded at 2800C to obtain an unstretched film. The film was then successively stretched in a longitudinal direction at 0 C with a stretching ratio of 3.5 times and then in a transverse direction at 95°C with a stretching ratio of i t 3.7 times, and heat-set at 2000C for 5 seconds to obtain o t a 50 um thick biaxially stretched film. This film had a 0 haze of a breaking strength of 12 kg/mm, and an initial modulus of 340 kg/mm, and had good transparency and mechanical properties.

Additionally, transparency, breaking strength and initial modulus were measured under the following conditions.

Transparency: St Haze of a sample film was measured according to t 'I ASTM D1003-52 after a heat treatment of the film at a temperature of 150°C for 10 minutes.

Breaking Strength and Initial Modulus: A sample of 10 mm in width and 100 mm in length was subjected to measurement according to JIS Z1702-1976 employing a pulling rate of 300 mm/min for measuring 38 breaking strength and 20 mm/min for measuring initial modulus.

Measurement of Curl-Extinguishing Ratio: The polyester film (50 gm thick) of the present invention prepared as described above, a commercially available PET film (50 gm thick) and a commercially available TAC film (125 gm thick) were subjected to measurement of water content according to the method of the present invention.

0 Further, curl-extinguishing ratio was measured '1 A.in a manner described below to obtain the results shown ArIAS.

in Table 1.

z t Method for Evaluating Curl-Extinguishing Degree A sample film of 12 cm x 35 cm in size was wound around a core of 10 mm in diameter and was subjected to treatment at 60 0 C x 30% RH x 72 hr. Then, the film was unwound from the core, dipped in 40 0

C

distilled water for 15 minutes, and dried for 3 minutes in a 55 0 C air thermostatic chamber while applying a load of 50 g. The length of the thus-treated sample was measured in a perpendicularly suspended state to evaluate the degree of restoration to the original length of 12 cm.

39 TABLE 1 Curl- Water Dipping Extinguishing Sample Content Treatment Ratio TAC (125 gm) 2.6 Treated 38 Not treated 14 PET (50 um) 0.4 Treated 16 Not treated 16 Present (50 0m) 0.7 Treated 98 Invention Not treated As is clear from Table 1, it is seen that polyester S" film in accordance with the present invention having a water content of 0.7 wt% shows an extremely large curlextinguishing ratio.

Preparation of Photographic Light-Sensitive Material Coating of Subbing Layer: A subbing layer of the following formulation was coated on each of the aforesaid polyester film and commercially available PET film after corona discharge treatment of both sides of them. The corona discharge 2 treatment was conducted to a degree of 0.02 KVA.min/r Gelatin 3 g Distilled Water 250 cc Sodium-sulfo-di-2-ethylhexyl- 0.05 g succinate Formaldehyde 0.02 g 40 Coating of Backing Layer: A backing layer of the following formulation was coated on one side of the subbed polyester films.

Preparation of a Dispersion of Tin Oxide-Antimony Oxide Composite 230 Parts by weight of stannic chloride hydrate and 23 parts by weight of antimony trichloride were dissolved in 3,000 parts by weight of ethanol to obtain a uniform solution. A 1 N sodium hydroxide aqueous o solution was dropwise added to the solution until the pH a of the solution became 3 to obtain a coprecipitate of colloidal stannic oxide and antimony oxide. The thus- S* obtained coprecipitate was allowed to stand at 50 0 C for 24 hours to obtain a reddish brown colloidal precipitate.

The reddish brown colloidal precipitate was separated by centrifugal separation. In order to remove excess ions, water was added to the precipitate, followed by centrifugal separation to wash with water. This washing procedure was repeated 3 times to remove excess 0 8. ions.

o a 200 parts by weight of the colloidal precipitate freed of excess ions was again dispersed in 1,500 parts by weight of water, and sprayed into a 6000C heated baking furnace to obtain a fine powder of a bluish tin oxide-antimony oxide composite having an average 41 particle size of 0.2 gm. This fine powder had a specific resistance of 25 £.cm.

A mixture of 40 parts by weight of the abovedescribed fine powder and 60 parts by weight of water was adjusted to 7.0 in pH and, after being roughly dispersed by a stirrer, the mixture was dispersed by a horizontal sand mill (trade name: Dyno mill made by WILLY A.

BACHOFEN AG) until a residential time became 30 minutes.

a iCoating of Backing Layer t Formulation shown below was coated in a dry thickness of 0.3 pm, and dried at 130 0 C for 30 seconds.

Coating Solution shown below was coated in a dry thickness of 0.1 pm and dried at 130 0 C for 2 minutes.

Formulation parts by weight Dispersion of Conductive Fine Particles Gelatin 1 Water 27 Methanol Resorcin 2 Polyoxyethylene Nonylphenyl Ether 0.01 42- Coating Solution for Forming Coating Layer parts by weight Cellulose Triacetate 1 Acetone Methanol Dichloromethylene p-Chlorophenol 4 Coating of Photographic Layers:ePhotographic layers as described below were S provided on the side opposite to the backing layero oO oao coated side of the PET film of the present invention and 0 00' the commercially available PET film.

*0 0 Q First Layer: Red-Sensitive Silver Halide Low Sensitive Layer o° Preparation of an Emulsion Solution for Forming a *o S- Low Sensitive Emulsion Layer o A silver bromoiodide emulsion containing 6 mol% iodide (average grain size: 0.6 jim; containing 100 g of 10oqo silver halide and 70 g of gelatin per kg of emulsion) was 0 a 0 prepared in an ordinary manner. To 1 kg of this emulsion was added 180 cc of a 0.1 wt% methanol solution of anhydro-5,5'-dichloro-9-ethyl-3,3'-di(3-sulfopropyl)thiacarbocyanine hydroxide pyridinium salt as a redsensitive sensitizer. Then, 20 cc of a 5 wt% aqueous solution of 5 -methyl-7-hydroxy-2,3,4-triazaindolizine, 43 i 330 g of Cyan Coupler Emulsion of the following formulation, and 20 g of Emulsion were added thereto.

Further, 50 cc of a 2 wt% aqueous solution of 2-hydroxy-4,6-dichlorotriazine sodium salt was added thereto as a gelatin hardener to prepare an emulsion for forming a low sensitive emulsion.

Emulsion (1) 10 wt% Gelatin Aqueous Solution 1,000 g (ii) Sodium p-Dodecylbenzenesulfonate 5 g Tricresyl Phosphate 60 cc Cyan Coupler 70 g Ethyl Acetate 100 cc A mixture of (ii) was made into a solution at 0 C, and the resulting solution was added to (i) previously heated to 55 0 C, followed by emulsification in a colloid mill.

Cyan Coupler

OH

CONH-(CK

2 3 0 -CsH' i(t) S(t)CH 44 Emulsion (2) 10 wt% Gelatin Aqueous Solution 1,000 g (ii) Sodium p-Dodecylbenzenesulfonate 5 g Tricresyl Phosphate 60 cc Cyan Coupler 6 g DIR Cyan Coupler* 64 g Ethyl Acetate 100 cc DIR Cyan Coupler:

OH

SN-N 0 C 1 4

H

S-C II

N-N

Second Layer: Red-Sensitive Silver Halide Middle Sensitive Layer Preparation of an Emulsion Solution for Forming Middle-Sensitive Emulsion Layer The following changes were conducted in the above-described Average grain size of emulsion: 0.9 pm Amount of added red-sensitive sensitizing agent: 140 cc 45 Amount of added emulsion: Emulsion 240 g Emulsion 10 g Third Layer: Red-Sensitive Silver Halide High Sensitive Layer Preparation of an Emulsion Solution for Forming High Sensitive Emulsion Layer The following changes were conducted in the above Average grain size of emulsion: 1.1 gm (grains of 1.0 im or more in size accounting for 50 wt% of the Stotal grains) Amount of added red-sensitive sensitizing agent: 100 cc Amount of added emulsion: Emulsion 150 g Fourth Layer: Gelatin Interlayer Fifth Layer: Green-Sensitive Silver Halide Low Sensitive Layer Preparation of an Emulsion Solution for Forming Low Sensitive Emulsion I A silver bromoiodide emulsion containing 6 mol% iodide (average grain size: 0.6 gm; containing 100 g of silver halide and 70 g of gelatin per kg of emulsion) was prepared in a conventional manner. To 1 kg of this emulsion was added 200 cc of a 0.1 wt% methanol solution of 3,3'-di(3-sulfoethyl)-9-ethylbenzoxacarbocyanine pyridinium salt as a green-sensitive sensitizing agent.

46 0000 0 00O OQ 00 a o no G Q- a 00 0 0* 0 0«0 0 00606 0 0 0 0 0 0 0 0 0 a a a o a a o 8 0 0 00 *O O 8 0 0 0 00 Then, 20 cc of a 5 wt% aqueous solution of 5-methyl-7hydroxy-2,3,4-triazaindolizine was added thereto, and 380 g of Magenta Coupler Emulsion and 20 g of Magenta Coupler Emulsion of the following formulations were added thereto.

Further, 50 cc of a 2 wt% aqueous solution of 2-hydroxy-4,6-dichlorotriazine sodium salt was'added thereto as a gelatin hardener to prepare an emulsion solution for forming a low sensitive emulsion.

Emulsion (3) 10 wt% Gelatin Aqueous Solution 1,000 g (ii) Sodium p-Dodecylbenzenesulfonate 5 g Tricresyl Phosphate 65 cc Magenta Coupler 6 g Ethyl Acetate 110 cc A mixture of (ii) was made into a solution at 55 0 C, and the resulting solution was added to (i) previously heated to 55 0 C, followed by emulsification in a colloid mill.

Magenta Coupler 1-(2,4,6-trichlorophenyl)-3-[3-(2,4-di-t-pentyl- 47 Emulsion (4) 10 wt% Gelatin Aqueous Solution 1,000 g (ii) Sodium p-Dodecylbenzenesulfonate 5 g Tricresyl Phosphate 65 cc Magenta Coupler* 63 g DIR Magenta Coupler** 60 g Ethyl Acetate 110 cc Emulsification was conducted-in the same manner as with Emulsion **DIR Magenta Coupler: 4-di-t-pentylphenoxy) butanamido ]phenyl} 3-(1-pyrrolidinyl)-4-(1-phenyltetrazolyl--5-thio)-5pyrazolone *Magenta Coupler: 00~zON 0 9 0 48 Sixth Layer: Green-Sensitive Silver Halide Middle Sensitive Layer Preparation of an Emulsion Solution for Forming Middle-Sensitive Emulsion Layer A silver bromoiodide emulsion containing 5 mol% of iodide (average grain size: 0.9 tm; containing 100 g of silver halide and 70 g of gelatin per kg of emulsion) was prepared in a conventional manner.- To 1 kg of this emulsion was added 150 cc of a methanol solution of the green-sensitive sensitizer shown in Then, 20 cc of a 5 wt% aqueous solution of 5-methyl-7-hydroxy-2,3,4triazaindolizine was added thereto. Further, 285 g of the above-described Emulsion and 15 g of the abovedescribed Emulsion were added thereto.

In addition, 50 cc of a 2 wt% aqueous solution of 2-hydroxy-4,6-dichlorotriazine sodium salt was added thereto as a gelatin hardener to prepare an emulsion solution for forming a middle sensitive emulsion.

Seventh Layer: Green-Sensitive Silver Halide High Sensitive Layer Preparation of an Emulsion Solution for Forming High Sensitive Emulsion Layer A silver bromoiodide emulsion containing 6 mol% iodide (average grain size: 1.1 im; 50 wt% of the grains based on the whole grains having a grain size of 1.0 tm -49 r .1 or more; containing 100 g of silver halide and 70 g of gelatin per kg of emulsion) was prepared in a conventional manner. To 1 kg of this emulsion was added 80 cc of a methanol solution of the green-sensitive sensitizing agent shown in Then, 20 cc of a 5 wt% aqueous solution of 5-methyl-7-hydroxy-2,3,4-triazaindolizine was added thereto and, further, 200 g of Emulsion was added thereto.

50 cc of a 2 wt% aqueous solution of 2-hydroxya0a 4,6-dichlorotriazine sodium salt was further added thereto as a gelatin hardener to prepare an emulsion solution for forming a high sensitive emulsion.

Eighth Layer: Yellow Filter Layer (dry thickness: 1.2 pm) Comprising Yellow Colloidal Silver Ninth Layer: Blue-Sensitive Silver Halide Low Sensitive Layer SI(3-a) Preparation of an Emulsion Solution for Forming Low Sensitive Emulsion Layer A silver bromoiodide emulsion containing 5 mol% j iodide (average grain size: 0.6 pm; containing 100 g of silver halide and 70 g of gelatin per kg of the emulsion) was prepared in a conventional manner. To 1 kg of this emulsion were added 20 cc of a 5 wt% aqueous solution of 5-methyl-7-hydroxy-2,3,4-triazaindolizine and 600 g of Yellow Coupler Emulsion of the following formulation.

50 Further, 50 cc of a 2 wt% aqueous solution of 2-hydroxy- 4,6-dichlorotriazine sodium salt was added thereto as a gelatin hardener to prepare an emulsion solution for forming a low sensitive emulsion.

Emulsion 10 wt% Gelatin A-queous Solution 1,000 g (ii) Sodium p-Dodecylbenzenesulfonate 5 g Tricresyl Phosphate 80 cc Yellow Coupler* 100 g o0Yellow DIR Coupler** 10 g o 0 C, 0 Ethyl Acetate 120 cc Q 0 NHC0C73 C 0 C C0NH 0000o o *Yellow Coplr:upe 0C e 0000 *HaCO CCH CO NH 0N0

/T

t0 02 IIX 00N0N 00**Yllw I Cupe 51 Tenth Layer: Blue-Sensitive Silver Halide Middle Sensitive Layer The following changes were conducted in the above Average grain size of emulsion: 0.9 pm Amount of added emulsion: 400 g Eleventh Layer: Blue-Sensitive Silver Halide High Sensitive Layer The following changes were conducted in the above Average grain size of emulsion: 1.1 4m (provided that grains larger than 1.0 4m account for 50 wt% of the total grains) Amount of added emulsion: 200 g Twelfth Layer: Surface Protecting Layer wt% Gelatin Solution 1,000 cc Sodium Dodecylbenzenesulfonate 40 mg SiO 2 Fine Particles (3.0 4m) 50 mg Sodium Polystyrenesulfonate 1 g 2-Hydroxy-4,6-dichlorotriazine 50 mg Additionally, amounts of coated silver for the respective light-sensitive layers described above were as follows: first layer (1.0 g/m2); second layer (0.8 g/m2); third layer (1.2 g/m 2 fifth layer (1.2 g/m2); sixth layer (1.0 g/m2); seventh layer (1.2 g/m2); ninth layer 52 (0.6 g/m 2 tenth layer (0.6 g/m 2 and eleventh layer (0.6 g/m 2 The thus-obtained color negative film was cut into a 35 mm size, and was loaded in a cartridge. After leaving it for 10 days at 40 0 C, photographing was conducted using an ordinary camera, followed by development processing the film as follows.

Processing Step Temperature Time (min) Color Development 38 3 I I Stopping 1 t t Washing with Water 1 Bleaching 2 Washing with Water 1 Fixing 2 Washing with Water 1 Stabilizing Bath 1 4 53 53

A

i Processing solutions used have the following formulations.

Color Developer: Sodium Hydroxide 2 g Sodium Sulfite 2 g Potassium Bromide 0.4 g Sodium Chloride 1 g Borax 4 g Hydroxylamine Sulfate 2 g Disodium Ethylenediaminetetraacetate 2 g Dihydrate S, 4-Amino-3-methyl-N-ethyl-N-(J3- 4 g hydroxyethyl) aniline Monosulfate SWater to make 1 a 4 4' SStopping Bath: Sodium Thiosulfate 10 g Ammonium Thiosulfate (70 wt% aq. soln.) 30 ml Acetic Acid 30 ml t Sodium Acetate 5 g Potash Alum 15 g t Water to make 1 2 0 4 54 r; 1 1:1 Bleaching Solution: Iron(III) Sodium Ethylenediaminetetra- 100 g acetate Dihydrate Potassium Bromide 50 g Ammonium Nitrate 50 g Borax 5 g Aqueous Ammonia to adjust pH to Water to make 1 Fixing Solution: o Sodium Thiosulfate 150 g :o .Sodium Sulfite 15 g Borax 12 g Glacial Acetic Acid 15 ml Oa 0 a o Potash Alum 20 g Water to make 1 0o00 0 Stabilizing Bath: So,' Borax 5 g a*",Oo Sodium Citrate 5 g 0 0 Sodium Metaborate (tetrahydrate) 3 g Potash Alum 15 g Sa Water to make 1 The curling state after development processing was as follows. Light-sensitive materials containing a commercially available PET film as a support failed to extinguish curling properties, whereas light-sensitive 55 materials containing polyester film of the present invention.scarcely curled.

The light-sensitive material of the present invention contains as a support a polyester film with an excellent mechanical strength, and enables removal of curling properties while maintaining the mechanical properties.

COMPARATIVE EXAMPLE 1 A 50-gm thick biaxially stretched S polyester film having an intrinsic viscosity of S*0.67 was prepared in the same manner as described in oooo Example 1 except that 10 parts by weight of polyethylene c00 00 o. glycol having a molecular weight of 4,000 was used in place of the same'amount of dimethyl adipate. The resulting film had a haze of a breaking strength of a a 2 2 8 kg/mm an initial modulus of 320 kg/mm and very poor transparency. When this film was not subjected to a heat Sotreatment for the measurement of haze, it had a high transparency and had a haze of o A light-sensitive material was prepared in the a same manner as described in Example 1 using the biaxially stretched, polyester -film obtained above. After development treatment, the exposed part of the film became opaque and developed images were not sharp. It is clear from the above that the polyester -film 56 prepared in Comparative Example 1 above is not useful as a support for a light-sensitive material.

Since the light-sensitive materials of the present invention have excellent mechanical properties and enable easy extinguishing of curling, they permit a marked reduction in the thickness of the support even when used as roll films and therefore render the size cf the cartridge compact or, in using the-same cartridge, enable loading of longer film. The polyester film of the 0090 o0 present invention can be produced at a low casting 0 temperature and is not broken upon stretching and, in on spite of its high water content, it maintains the 0 0 essential merits of polyester film.

In addition, it suffers extremely less precipitation of oligomers in spite of the high water 0 content, thus suffering no detrimental influences on photographic properties.

o 9 Further, it enables reduction of the humidity of the wrapping case of light-sensitive materials, and 0o0g hence photographic properties change less with time 0 While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.

57

Claims (17)

1. A photographic light-sensitive material, which comprises a polyester film support having provided thereon at least one light-sensitive silver halide emulsion layer, said polyester film having a haze of up to a water content of from 0.5 wt% to 5.0 wt%, a curl-extinguishing ratio of 50% or more, and containing as predominant constituents a terephthalic acid component and a glycol component, said polyester film further comprising an aliphatic dicarboxylic acid component having 4 to 20 carbon atoms as a copolymerization component in an amount of from 3 to 25 mol% based on the terephthalic acid component, wherein the haze is measured t in accordance with ASTM D1003-52 after heat treatment of I the film at a temperature of 150 0 C for ten minutes, the water content is measured after first moisture- Sconditioning the film under conditions of 23 0 C and 30% RH Sfor three hours, next dipping the film in distilled water at 23 0 C for fifteen minutes and then measuring the water content using a micro-moisture meter at a drying temperature of 150 0 C and the curl-extinguishing ratio is measured after first dipping the film in distilled water at 40 0 C for fifteen minutes, and then drying for three minutes in air in a thermostatic chamber maintained at 55 0 C while applying a load of

2. The photographic light-sensitive material as claimed in claim 1, wherein the polyester film in addition to the terephthalic acid component contains an aromatic dicarboxylic acid having a metal sulfonate as a copolymerization component.

3. The polygraphic light-sensitive material as claimed in claim 2, wherein said aromatic dicarboxylic acid having a metal sulfonate is selected from the group consisting of 5-sodium sulfoisophthalic acid, sulfoisophthalic acid, 5-lithium sulfoisophthalic acid, 2-sodium sulfoterephthalic acid, 2-potassium sulfoterephthalic acid, 2-lithium sulfoterephthalic acid,

4-sodium sulfophthalic acid, 4-potassium sulfophthalic NT207399.8.91 402/20739A/9.8.91 59 acid, 4-lithium sulfophthalic acid, 4-sodium sulfo-2,6- naphthalenedicarboxylic acid, 4-potassium sulfo-2,6- naphthalenedicarboxylic acid, and 4-lithium sulfo-2,6- naphthalenedicarboxylic acid. 4. The photographic light-sensitive material as claimed in claims 2 or 3, wherein said polyester film mainly comprises terephthalic acid as a dicarboxylic acid component, and the copolymerization amount of said aromatic dicarboxylic acid component having metal sulfonate group is 2 to 15 mol% based on the terephthalic acid component.

The photographic light-sensitive material as claimed in any one of claims 1 to 3, wherein said polyester film is a copolymerized polyethylene terephthalate film.

6. The photographic light-sensitive material as claimed in. any one of claims 1 to 5, wherein the polyester film has a breaking strength of from 8-25 kg/mm 2 and an initial modulus of from 200 to 500 kg/mm 2

7. The photographic light-sensitive material as claimed in any one of claims 1 to 6, wherein said aliphatic dicarboxylic acid component is selected from the group consisting of succinic acid, adipic acid and sebacic acid.

8. The photographic light-sensitive material as claimed in any one of claims 1 to 7, wherein the glycol is a polyalkylene glycol and is used as an additional copolymerizable component.

9. The photographic light-sensitive material as claimed in any one of claims 1 to 8, wherein said i polyester film contains a dye.

The photographic light-sensitive material as claimed in any one of claims 1 to 9, wherein said polyester film has a subbing layer on its surface, between the film and the silver halide emulsion layer.

11. The photographic light-sensitive material as claimed in claim 10 wherein the subbing layer is comprised of: 402/20739A/9.8.91 60 a polymerlatex composed of styrene-butadiene type copolymer or a vinylidene chloride copolymer; or a hydrophilic binder.

12. The photographic light-sensitive material as claimed in claim 11 wherein the hydrophilic binder is gelatin.

13. The photographic light-sensitive material as claimed in any one of claims 1 to 12, wherein said light- sensitive material is a roll film.

14. The photographic light sensitive material as claimed in any one of claims 1 to 13, wherein said polyester film has a curl-extinguishing ratio of 80% or more.

15. The photographic light-sensitive material as claimed in any one of claims 1 to 14, wherein said polyester film has a thickness of from 25 to 250 gm. S,

16. The photographic light-sensitive material as claimed in claim 15, wherein said polyester film has a S 20 thickness of from 40 to 150 lm.

17. A photographic light-sensitive material substantially as herein described with reference to Example 1 and not including the Comparative Example. Dated this 12th day of August 1991 FUJI PHOTO FILM CO., LTD. and TORAY INDUSTRIES, INCORPORATED By their Patent Attorneys GRIFFITH HACK CO 402/20739A/9.8.91