Photothermographic material

a technology of photothermographic materials and materials, applied in the field of photothermographic materials, can solve the problems of dye decolorization, unsolved problems not seen in wet developing treatment, and none of these meet the requirements of medical image output systems

Inactive Publication Date: 2006-03-16
FUJIFILM HLDG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0202] Preferred as R21 to R23 is an alkyl group, an aryl group, an alkoxy group, or an aryloxy group. Concerning the effect of the invention, it is preferred that at least one or more of R21 to R23 are an alkyl group or an aryl group, and more preferably, two or more of them are an alkyl group or an aryl group. From the viewpoint of low cost availability, it is preferred that R21 to R23 are of the same group.
[0203] Specific examples of hydrogen bonding compounds represented by formula (D) of the invention and others are shown below, but it should be understood that the invention is not limited thereto.
[0204] Specific examples of hydrogen bonding compounds other than those enumerated above can be found in those described in EP No. 1096310 and in JP-A Nos. 2002-156727 and 2002-318431.
[0205] The compound expressed by formula (D) used in the invention can be used in the photothermographic material by being incorporated into the coating solution in the form of solution, emulsion dispersion, or solid fine particle dispersion similar to the case of reducing agent, however, it is preferred to be used in the form of solid dispersion. In the solution, the compound expressed by formula (D) forms a hydrogen-bonded complex with a compound having a phenolic hydroxyl group or an amino group, and can be isolated as a complex in crystalline state depending on the combination of the reducing agent and the compound expressed by formula (D).
[0206] It is particularly preferred to use the crystal powder thus isolated in the form of solid fine particle dispersion, because it provides stable performance. Further, it is also preferred to use a method of leading to form complex during dispersion by mixing the reducing agent and the compound expressed by formula (D) in the form of powders and dispersing them with a proper dispersion agent using sand grinder mill or the like.
[0207] The compound expressed by formula (D) is preferably used in a range from 1 mol % to 200 mol %, more preferably from 10 mol % to 150 mol %, and further preferably, from 20 mol % to 100 mol %, with respect to the reducing agent. (Photosensitive Silver Halide) 1) Halogen Composition

Problems solved by technology

However, none of these satisfy the requirements for medical image output systems.
However, unsolved problems not seen in wet developing treatment exist in heat developing treatment.
One of these problems is a problem concerning decoloring of a dye.
In heat developing treatment, on the other hand, removal of the dye poses a significant problem.
Problems posed when using a discoloring mechanism are that a dye is insufficiently discolored or, on the contrary, the stability of a dye is insufficient so that the dye is discolored while the photothermographic material is stored.
Also, when using a polymethine dye, the decomposed products of the dye left after the dye is discolored have the capability of slightly absorbing light, posing a problem concerning the residual color of an image (particularly in the highlight portion).
There is also a problem concerning recoloring (particularly when the dye is brought into contact with an acid) after heat developing and there are cases where byproducts generated after the complicated reaction processes deteriorate the handling characteristics of the light-sensitive material after the photosensitive material is treated.
However, this method has the problem that because the coating solution has no setting ability, the formed film is disturbed by dry air after it is applied, causing drying unevenness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

(Preparation of PET Support)

(1) Film Manufacturing

[0387] PET having IV (intrinsic viscosity) of 0.66 (measured in phenol / tetrachloroethane=6 / 4 (weight ratio) at 25° C.) was obtained according to a conventional manner using terephthalic acid and ethylene glycol. The product was pelletized, dried at 130° C. for 4 hours, melted at 300° C. Thereafter, the mixture was extruded from a T-die and rapidly cooled to form a non-tentered film.

[0388] The film was stretched along the longitudinal direction by 3.3 times using rollers of different peripheral speeds, and then stretched along the transverse direction by 4.5 times using a tenter machine. The temperatures used for these operations were 110° C. and 130° C., respectively. Then, the film was subjected to thermal fixation at 240° C. for 20 seconds, and relaxed by 4% along the transverse direction at the same temperature. Thereafter, the chucking part was slit off, and both edges of the film were knurled. Then the film was rolled up at...

example 2

[0439] A magenta dye was further added to the sample 4 in Example 1 as shown in Table 2 to make a sample. The obtained sample was evaluated in the same manner as in Example 1. The results are shown in Table 2.

TABLE 2Magenta dyePhotographicAmount toperformanceSamplebe addedSensi-Sharp-No.Type(mg / m2)FoggingtivitynessTint4——0.17−0.010.95417Formula100.18−0.010.955(IV)-(1)18Formula100.18−0.010.955(IV)-(4)19Formula100.18−0.010.955(IV)-(25)

[0440] The combined use of a magenta dye resulted in the production of a photothermographic material having a more preferable tint.

example 3

[0441] A mordant was further added to the sample 17 in Example 2 as shown in Table 3 to make a sample. The obtained sample was evaluated in the same manner as in Example 1. The results are shown in Table 3.

TABLE 3MordantPhotographicAmount toperformanceSamplebe addedFogg-Sensi-Sharp-No.Type(mg / m2)ingtivitynessTintRemarks4——0.17−0.010.954Presentinvention17——0.17−0.010.955Presentinvention20B-1900.17−0.010.985Presentinvention21B-2900.17−0.010.975Presentinvention22B-3900.17−0.010.985Presentinvention

[0442] The combined use of a mordant resulted in the production of a photothermographic material having higher sharpness.

[0443] Mordant in the Invention

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Abstract

Disclosed is a photothermographic material comprising an image forming layer containing at least a light-sensitive silver halide, a light-insensitive organic silver salt, a reducing agent and a binder and a non-image forming layer on at least one surface of a support, wherein 50% by weight or more of the binder is a hydrophilic binder, the light-sensitive material further comprising a metal phthalocyanine compound represented by the following formula (PC-1): wherein M represents a metal atom, R1, R4, R5, R8, R9, R12, R13 and R16 respectively represent a hydrogen atom or a substituent where at least one of R1, R4, R5, R8, R9, R12, R13 and R16 is an electron attractive group and R2, R3, R6, R7, R10, R11, R14 and R15 respectively represent a hydrogen atom or a substituent.

Description

CROSS-REFERENCE TO RELATED APPLICATION [0001] This application claims priority under 35 USC 119 from Japanese Patent Application No. 2004-270389, the disclosure of which is incorporated by reference herein. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to a photothermographic material, and in particular, relates to a photothermographic material using a hydrophilic binder as an image forming layer binder. [0004] 2. Description of the Related Art [0005] In recent years, in the field of medicine, there has been a strong desire for reductions in the amount of process waste fluids in view of environmental protection and space saving. There is therefore a need for development of technologies concerning photothermographic materials for medical diagnosis and for photographic technology use which can be efficiently exposed using a laser image setter or laser imager and enable the formation of a clear black image having high resolution and s...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G03C1/00
CPCG03C1/49845G03C1/49854G03C1/49863G03C1/04
Inventor NAKAGAWA, HAJIMEYAMAMOTO, SEIICHITANIGUCHI, MASAHIKO
Owner FUJIFILM HLDG CORP
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