JPS63127241A - Dye fixing element - Google Patents

Abstract

PURPOSE:To obtain color transparency which has good image quality and is suitable for an OHP or the like by providing a dye receptive layer on a transparent base to form a dye fixing element and transferring a diffusive dye image formed by heat development thereto from a photosensitive material. CONSTITUTION:This dye fixing element is used to receive thereon the diffusible dye formed or released from a heat developable color photosensitive element contg. at least silver halide and dye donative material when said element is subjected to heat development after or simultaneously with image exposing. Said dye fixing element is formed by providing the dye receptive layer consisting of a polymer, etc., on the transparent base and is provided with a protective layer, released layer, etc., thereon at need. The photosensitive element 3 delivered from a photosensitive material preserving part 4 is exposed in an exposing part and is sent to a developing and transferring part 7, where the element is superposed on the dye fixing element 2 sent from a dye fixing element supplying device 1 and is heated. The image is thus transferred to the dye fixing element 2. The photosensitive element 3 is thrown into a photosensitive material throwing box 30 via a photosensitive material conveying part 20.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a dye fixing element for receiving a diffusible dye image obtained by heat development to obtain a color image, and particularly for an overhead projector (hereinafter referred to as OHP). Color transbearing range suitable for projection observation such as
This invention relates to a dye fixing element that can be used as a dye fixing element.

(Prior art and its problems) Regarding the method of obtaining a color image by heat development,
Many methods have been proposed. A method for forming a yellow image by combining an oxidized developer with a fogger is described in U.S. Patent No. J, JT3/Cort.
p-amine phenolic reducing agents in U.S. Pat. No. 3,7t/270;
2. J/2 and Research Disclosure Magazine/Research Disclosure/Research Disclosure/Research Disclosure/Research Disclosure/Research Disclosure/Research Disclosure/Research Disclosure/Research Disclosure/Research Disclosure/Research Disclosure/Research Disclosure/Research Disclosure/Research Disclosure/Research Disclosure/Research Disclosure/Research Disclosure/Research Disclosure/Research Disclosure/Research Combinations of reducing agents and participating couplers have been proposed.

However, in this method, a reduced silver image and a color image are simultaneously generated in the exposed area after thermal development, resulting in a problem that the color image becomes cloudy.

To solve this problem, the silver image can be removed by liquid processing, or only the dye can be transferred to other layers, such as the image-receiving layer.
There is a method of transferring the dye to a supporting sheet, but it suffers from the disadvantage that it is not easy to distinguish between the unreacted material and the dye and transfer only the dye.

Furthermore, the above methods generally require a relatively long time for development.
- In short, the resulting images also had the drawbacks of only high capri and low image density.

In order to improve these drawbacks, a method is proposed in which a diffusible dye is released in an image-like manner by heating, and the diffusible dye is transferred to a dye fixing element having a mordant using a solvent such as water or a high-boiling organic solvent. a method of transferring to a dye-fixing element using a solvent;
A method of transferring to a dye fixing element using a hydrophilic thermal solvent incorporated in the dye fixing element, a method in which a diffusible dye is heat diffusible or sublimable, and a dye fixing element is transferred by thermal diffusion or sublimation. A method of transferring has been proposed6 (U.S. Pat. No. ≠).

e4J, No. 07, No. Hiroshi, $74c, No. rj7, No. 1I, No. 1171r, No. 927, No. 1I, ! 07,3
No. 10, No. A, Zoo, No. 621, No. 1, No. 11
3, P/'I No.; Unexamined Japanese Patent Publication No. Sho JR-14Iyo4tt, No. JR-/4T90147, Same! Tar 1zaua.

Issue, same jter/j4L14ej issue, same! Tarlbujll
) No. 14, same! Tar1ror! Same issue! tar/j14
I39, same jter/744132, same! Tar/74
AI3J issue, same! Tar/74crJII, same! 77 Hirot Jr., etc.) These methods require high temperatures to carry out development in a short period of time, and are accompanied by drawbacks such as an increase in photoresistance. For this reason, it has been proposed to incorporate a base or a base molecule into a thermophotographic material, but this has the drawback of impairing the stability of the photosensitive element over time. Therefore, U.S. Pat.
≠3, European patent/Z! , jJ1, U.S. Patent p, 4
cPri, No. 772, Tokukai Sho! Tar 110. ! No. 37,%
Hope! Tar204. No. rJJ discloses a base precursor that is active and has good stability over time.

In the above method, the development temperature is still high and the stability of the photosensitive material over time is not sufficient. Therefore, by heat developing in the presence of a small amount of water and further transferring the released dye]
A method of accelerating development, lowering the developing temperature, and simplifying processing is disclosed in JP-A-J Turco TR.

The disclosure source is No. 113 and Japanese Patent Application Nos. 1986-7 and 70. These methods use a base built into the dye-fixing element, but there are concerns about deterioration of membrane quality and safety issues. A method for generating this is disclosed.

By the way, in the above-mentioned heat-developable color image forming method, the purpose of which is usually to obtain a color print, a white reflective support is used as the support for the dye-fixing element. Therefore, in conventional dye fixing elements, C
) It was not possible to obtain accuracy in a color transformer used for the purpose of projection observation such as HP.

(Object of the Invention) An object of the present invention is to provide a dye-fixing element that can receive a diffusible dye image formed by thermal development and obtain a color transbearing range with good image quality. It is in. Another object of the present invention is to provide a dye fixing element that can be used without any problem in a heat-developable color image forming apparatus.

(Structure of the Invention) An object of the present invention is to receive a diffusible dye produced or released by thermally developing a heat-developable color photosensitive element rich in at least silver halide and a dye-donating substance after imagewise exposure or simultaneously with imagewise exposure. This has been achieved by a dye fixing element characterized in that it comprises a dye receiving layer on a transparent support.

The dye fixing element of the present invention is photosensitive -j! It has a support different from that of the photosensitive element, or at least can be separated from the photosensitive element after the image forming process and handled independently.

The transparent support used in the dye fixing element of the present invention is preferably! ! 30% or more, especially 30% for OTM light
It is a film-like material having a transmittance of the above. Preferably, it is a flexible support with high smoothness.

Useful are films made of semi-synthetic or synthetic polymers such as cellulose nitrate, cellulose acetate, cellulose acetate butyrate, polystine, polyvinyl chloride, polyethylene terephthalate, polycarbonate, and the like. The surface of these supports may be primed to improve adhesion to the dye-receiving layer. The surface of the support may be subjected to glow discharge, corona discharge, ultraviolet irradiation, flame treatment, etc. before or after the undercoating treatment.

In the present invention, the dye-receiving layer includes a polymer mordant and JP-A-Sho! 7-7 r≠! Dye-receptive polymers such as those described in this issue can be used. Here, the polymer mordant is a polymer containing a tertiary amino group, a polymer having a nitrogen-rich heterocyclic moiety, a polymer having a J-class cation group, etc., and preferably other hydrophilic polymers (such as gelatin). ) is used in combination with

For vinyl monomer units with tertiary amino groups t[, JP-A-40-406≠3, JP-A-40-406≠1.0
-! Specific examples of polymers containing one unit of a vinyl monomer having a tertiary imidazole group include JP-A No. 60-//113≠, JP-A No. 60-/Coater≠1, and U.S. Patent No. 1LL. , No. 212.3or, No. μ, //r, /kohiro, No. 3. /Hiroa', o6i
No. 17/10/1987, same a/-r'yiri
It is written in the number etc.

Preferred specific examples of polymers containing one vinyl monomer unit having a quaternary imidanium salt include British Patent No. 2,0
36, 10/No. 2. Ori 3゜0hiro No. 7, same No. 1.
! Tada, 5'l/No., U.S. Pat.
No., Kodai Hiro, ≠jO, 2ko≠, JP-A-Shogu l-2,r
, No. 223, etc.

Other preferred specific examples of polymers containing one vinyl monomer unit containing a quaternary ammonium salt include U.S. Pat. No., JP-A No. 6 O-J-7136, JP-A No. 60-2311341, JP-A No. 60-/2 Kota YO, JP-A No. 60-2311341, etc.

The polymer mordant is mixed with a binder such as gelatin and applied. The light-sensitive element may be coated integrally with the dye-fixing element in releasable form, or the light-sensitive element may be coated on a separate support.

The polymer particularly preferably used in the present invention is a heat-resistant organic polymer substance having a glass transition temperature of 30° C. or higher and λzo0c or lower. There are many points that are not clear regarding the mechanism by which the dye released from the compound of the present invention penetrates into the polymer. It is generally believed that at processing temperatures above the glass transition point, the thermal motion of polymer chains is large and that dyes can enter the resulting gaps between chain molecules. This friend has a glass transition temperature of ≠7
By using a layer made of an organic polymer substance of 70C or more and 1.2J00C or less as the dye fixing layer, the compound of the present invention and the dye can be distinguished, and a clear image can be formed in which only the dye enters the dye fixing layer. be able to.

Examples of organic polymeric substances used in the present invention include the following. To list them, the molecular weight λOOOO~rz
ooo polystyrene, polystyrene derivatives with substituents having less than a carbon number, polyvinylcyclohexane, polyallylbenzene, polyvinylpyrrolidone, polyvinyl carbazole, polyallylbenzene, polyvinyl alcohol,
Polyacetals such as polyvinyl formal and polyvinyl butyral, polyvinyl chloride, chlorinated polyethylene, polybutylene trichloride, polyacrylonitrile, BoIJ-N, N-dimethylallylamide, p-cyanophenyl group, hantachlorophenyl group, □x,
Polyacrylate having lI-dichlorophenyl group, polyacrylchloroacrylate, polymethyl methacrylate, polyethyl methacrylate, polypropyl methacrylate, polyimpropyl methacrylate, polyisobutyl methacrylate, polytert-butyl methacrylate, polycyclohexyl methacrylate,
Polyethylene glycol dimethacrylate, Poly J-
Examples include polyesters such as cyanoethyl methacrylate and polyethylene terephthalate, polysulfone, bisphenol A polycarbonate, polycarbonates, polyanhydrides, polyamides, and cellulose acetates. In addition, J. Brandrup, E.H., Immergt (J. Brandrup, E.H., Immergt.
ut) m1John Wiley &5ons
Glass transition temperature uo″c or higher as stated in the publication, 2
Synthetic polymers below 10°C are also useful. These polymeric substances may be used alone or in combination, or may be used as a copolymer by combining two or more of them. These polymers may also serve as a support applied to the photographic element described below, or may form a layer independent of the support. For example, these polymers can be used as a support for the photosensitive material of the present invention, and this support can also function as a dye fixing layer (in this case, the photosensitive element is provided in a removable manner). The polymer can be used as a dye fixing layer of a dye fixing material independent of the light-sensitive material, or the support of the dye fixing material can also serve as the dye fixing layer.

The dye-fixing element may be provided with a protective layer, a release layer, an anti-curling layer, and an auxiliary layer as required.

It is particularly useful to provide a rattan protection layer. One of the above layers'1
Next, multiple layers include a hydrophilic heat solvent, a plasticizer, an anti-fading agent, a U absorbent, a slip agent, a matting agent, an antioxidant, and a dispersion vinyl compound that increases dimensional stability. A surfactant, etc. may also be included. Specific examples of these additives are described in JP-A-47-112J6.

Any of a variety of thermal development apparatuses can be used to obtain color images using the dye fixing element of the present invention and the heat-developable color photosensitive element. For example, Tokukai Akira! Turf Yo 2 Hiro No. 7, same! Tar/77Jf-7, same! Tar/I/J! Preferably, the apparatuses described in No. J, No. 40-/1?11, Utility Model Application No. 60-/147317, and the like are used.

A schematic diagram showing seven embodiments of the apparatus used in the present invention when the dye-fixing element and the exposed light-sensitive element are superimposed and developed and transferred is shown in 1Q.

As shown in FIG. 1, the photosensitive element 3 is stored in a photosensitive material storage section, and the photosensitive material 3 is sent out as required. This photosensitive material X3 may be in the form of a roll or a cut sheet, but if it is in the form of a roll, it may be cut to the required length by a photosensitive material cutter. After that, it is sent to the exposure section t, and exposed to the exposure drum j/
The light source 4J is wound around the light source 4J and is conveyed by rotation to the exposure source 4J.

The illuminance and exposure time may be determined by adjusting the amount of light from the light source and the rotational speed t of the exposure drum.

As a light source in this case, radiation including visible light and infrared rays can be used. In general, various light sources such as tungsten lamps, halogen lamps such as mercury lamps and iodine lamps, xenon lamps, laser light sources, CRT light sources, fluorescent tubes, and light emitting diodes (LEDs) are used in addition to the light sources used for normal color printing. be able to.

The exposed photosensitive element 3 rotates in the opposite direction to the rotation when it is wound around the exposure drum 6, and is sent to the development transfer section 7. If the photosensitive element 3 requires water application, the exposed area t
The water application section t may be interposed between the development transfer section 7 and the development transfer section 7.

In the above, the conveyance speed of the photosensitive material 3 is imitation! ~λjm/s
It is sufficient to set the degree. - Then, when a sensor (not shown) detects that the photosensitive element 3 is in a predetermined position, the pickup row of the dye fixing element supply device 1, 7-/
- begins to rotate, and the dye fixing element is sent to the development and transfer section 7.

The dye fixing element 2 sent out as described above is superimposed on the photosensitive element 3 conveyed as described above in the development transfer section 7, and after being heated and developed and transferred, it is conveyed to the peeling section 2 where the dye is removed. The photosensitive element 3 is peeled off from the fixing element.

The development and transfer may be carried out in a manner in which the development step and the transfer step are carried out simultaneously or consecutively, or separately, and these may be selected as appropriate. This will be explained in detail later.

Then, after the image is formed, the dye fixing element is transferred to the drying section IO.
transported to and dried. Further, the photosensitive element 3 is disposed of in the photosensitive material waste box 3o via the photosensitive material transport section λO.

In Fig. 1, A-i is an optical cell, and color S
A warning is issued when the dye fixing element runs out in the fixing element supply device. Further, A-λ is a similar optical sensor that detects whether the dye fixing element has come to or passed a predetermined position on the transport path.

As described above, in thermal development color image forming apparatuses, optical sensors are often used to detect the presence of dye fixing elements.

However, when the dye fixing element is made of a transparent support as described above, it is not detected by this optical sensor.

Therefore, in the present invention, a portion that is opaque to light of the wavelength used by the optical sensor (preferably a portion whose transmittance for that light is `t--〇% or less) is placed at a position commensurate with the detection position of the optical sensor. )'t-provided on the dye fixing element. An example is shown in FIG. Figure 1 (a) shows an example in which an opaque portion 21 is provided over the entire end of the dye fixing element, and Figure 2 (b)
indicates the side in which only a portion of the end portion is made opaque. Here, the opaque portion may be provided by printing on a transparent support, or may be provided by dipping or applying a dye or pigment to a part of the coating layer. The simplest and cheapest method is to affix opaque labels to the necessary areas.

In addition to the above-mentioned purpose, or independently of the above-mentioned purpose, in order to facilitate the discrimination between the front and back sides of the dye-fixing element, the color of the front side and the back side of the label are changed, the dye or It is also possible to provide the pigment in a layered λ layer and change the color of the front layer and the color of the back layer71) (for example, by layering a titanium dioxide layer and a carbon black layer).
. Preferably, the color of the front side and the back side are changed so that the color difference is 3.0 or more, or more simply, on at least one side of said label, it is indicated whether it is the front side or the back side. Symbols and characters may also be printed.

As described above, since the dye-fixing element of the present invention has a dye-receiving layer on a transparent support, it is suitable for projection observation such as OHP. Second, since a portion thereof has an opaque portion t-i for detection by an optical sensor, there is no problem at all when it is used in a thermal development color image forming apparatus.

The heat-developable light-sensitive materials to be used in combination with the dye-fixing element of the present invention include heat-developable color light-sensitive materials that form or release diffusible (including sublimable) dyes by exchange heat development, as listed in the prior art section. Either can be used.

(Effects of the Invention) Since the dye-fixing element of the present invention has a dye-receiving layer on a transparent support, the dye image formed by heat development and diffusible is simply transferred from the light-sensitive material (this transfer can be done by heat development). (may be performed at the same time) A beautiful color transbare range suitable for OHP etc. can be obtained. ! Since the dye-fixing element of the present invention is provided with a portion that is opaque to the wavelength of light used for the optical sensor at a suitable height (preferably at the end), a means for observing the conveyance state using the optical sensor is provided. It can be used without any problems with the thermal development transfer device used.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the 1B side of an apparatus used when a dye-fixing element is exposed to light and is completely overlapped with a photosensitive element for development and transfer. Figure tJcla and Figure 2b are drawings showing embodiments of the dye fixing element of the present invention. Explanation of symbols l...Dye fixing element supply device, l/...Storage section, ///...locking part, /Co...Pickup roller, Co...Dye fixing element, 3... Photosensitive element, da...
Sensitive Materials Preservation Department! ...Sensitive material cutter, 6...Exposure section, 61...Exposure drum, 6...Exposure source, 7...Development transfer section, r...Water application section, T...Peeling Part, 10...Drying part,
KO...Sensitive material transport section, 30...Sensitive material waste box, A
- / 3r No. 2, title of the invention, dye fixing element 3, person making corrections. Relationship to the case Patent application human hair Target of amendment The "Detailed Description of the Invention" section of the specification and "Drawings" 5. Contents of the amendment (1) The description in the "Detailed Description of the Invention" section of the specification Correct as shown below. l) Correct “thermophotonic material” in line I to “photosensitive material”. 2) Insert K ", more preferably to% or more" after "!0chi or more" on the 1st line of page 1. , (If) Replace the fat diagram with the one on the attached sheet.

Claims (1)

[Claims] A dye-fixing element that receives a diffusible dye produced or released by thermally developing a heat-developable color photosensitive element containing at least silver halide and a dye-donating substance after or simultaneously with imagewise exposure, the dye-fixing element being arranged on a transparent support. A dye-fixing element comprising a dye-receiving layer.