JPH09179306A - Image forming material, image receiving sheet and production of releasable cushion layer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the approximate characteristic with printed matter by incorporating a specific ratio of polyolefin specified in a number average mol.wt. with a releasable cushion layer. SOLUTION: The polyolefin having the number average mol.wt. of 1000 to 15000 is incorporated at 5 to 40wt.% with the releasable cushion layer of the image forming material which is constituted by successively coating the surface of a base with at least the releasable cushion layer capable of releasing an image forming layer and the image forming layer and of which the image forming layer is transferable. The release property from image receiving paper is improved without impairing a single cushion characteristic (follow-up characteristic to the ruggedness the paper surface) by using such releasable cushion layer. The formation of the proofing images having the excellent approximation characteristic to printed matter exposed with the paper surface of non-image parts in thus made possible by using more kinds of paper as image receiving paper without the requirement for a severe management of the environment and the equipment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image-forming material, an image-receiving sheet material and a method for producing a releasable cushion layer suitable for producing a color proof for color proofing in color printing. The present invention relates to an image-forming material, an image-receiving sheet material, and a mold-releasing cushion layer manufacturing method which are excellent in closeness, have a wide image transfer temperature latitude, have good image area transferability, and are excellent in moldability of mold-releasing cushion layer.

[0002]

BACKGROUND OF THE INVENTION JP-A-59-97140 discloses a light-sensitive material and a material for a release layer having the same constitution as in the present invention. However, the preferred condition of the release layer is that the adhesive strength to the support is weak, and only the method of transferring the release layer together with the image at the time of transfer to the image receiving sheet is described. In this method, the transferred image is finally covered with this release layer resin film, and the surface of the printing paper is not exposed in the non-image area like the printed material. Is a poor material in image reproducibility.

In this respect, Japanese Patent Laid-Open No. 3-148248 discloses that
Only the image part by the direct transfer method is disclosed,
Further, Japanese Patent Laid-Open No. 4-369691 discloses transfer of only an image portion by an indirect transfer method.

According to these techniques, the paper surface of the non-image area is exposed, so that an image very similar to a printed matter can be obtained. However, since the release layer directly contacts the paper, it depends on the type of image receiving paper. The transferable temperature / pressure condition range is extremely narrow, and the transfer of the image area and the releasability of the non-image area may not be able to be stably balanced. That is, there is an inconvenience that strict management of the environment and equipment is required, and the work load is large.

Japanese Patent Application Laid-Open No. 61-189535 discloses that since the non-image area does not directly contact the paper surface, it is easy to balance the transfer and the releasability by adjusting the temperature and pressure conditions during the transfer. Is coated with an organic polymer, so that the similarity to printed matter is poor. On the other hand, as a method for producing a multilayer type releasable cushion layer, Japanese Patent Laid-Open No. 1-155348 (two layers by coextrusion) is known, but one layer has a thickness of 20.
If the thickness is less than μm, a stable film thickness cannot be obtained, and the performance varies depending on the place.

Further, Japanese Patent Laid-Open No. 3-54562 (two-layer coating by applying a resin solution) is also known, but since a resin which is poorly soluble in an organic solvent is used, it is difficult to handle since it is necessary to keep the temperature of the resin solution. Further, since the interlayer adhesion is not strong, the upper layer may be blown off or peeled off at the time of applying the image forming layer or transferring.

[0007]

SUMMARY OF THE INVENTION According to the present invention, the finished quality is close to that of a printed matter and the transferred image has excellent image reproducibility, that is, whether the finished proofing sheet can be faithfully reproduced on the original. An image forming material not only having no image defect such as transfer failure in the evaluation but also having no coating on the non-image part surface and having excellent closeness to a printed matter,
A first object of the present invention is to provide an image-receiving sheet material and a method for producing a releasable cushion layer, and an image formation having a wide image transfer temperature latitude, good image area transferability, and excellent releasability cushion layer production suitability. A second object is to provide a material, an image receiving sheet material and a method for producing a releasable cushion layer.

[0008]

To achieve the above object, the present invention has the following constitution.

1: At least an image-releasing cushion layer capable of peeling an image-forming layer and an image-forming layer are sequentially coated on a support, and in the image-forming material to which the image-forming layer can be transferred, Number average molecular weight of the cushion layer is 1,0
5 to 40 wt% of 0 to 15,000 polyolefin
An image forming material comprising:

2. The image forming material according to claim 1, wherein the releasable cushion layer contains 50 wt% or more of a thermoplastic resin having a VICAT softening temperature (JIS-K7206) of 65 ° C or lower.

3: The image forming material according to claim 2, wherein the thermoplastic resin has a melt flow rate (JIS-K7210: 190 ° C, 2.16 kgf) of 50 or less.

4: The melt flow rate (JIS-K7210: 190 ° C., 2.16 kgf) of the thermoplastic resin is Y, and the amount of polyolefin added (w) in the releasable cushion layer.
The image forming material according to claim 3, wherein Y ≦ (25 / e ^0.06X ), where t%) is X.

5: The image forming material according to claim 2, wherein the thermoplastic resin has a polymerized unit derived from ethylene.

6: The softening temperature (JIS-K2207) of the polyolefin contained in the releasable cushion layer is 100 ° C.
The image forming material according to claim 1, which is the above.

7: The image forming material according to claim 1, wherein the polyolefin contained in the releasable cushion layer is polyethylene and / or polypropylene.

8: An image-receiving sheet material having a releasable cushion layer on a support capable of receiving the image layer formed on the image-forming material and retransferring only the received image layer. Polyolefin having a number average molecular weight of 1,000 to 15,000 is added to the moldable cushion layer in an amount of 5 to 40.
An image receiving sheet material characterized by containing wt%.

9: The image-receiving sheet material according to claim 8, wherein the releasable cushion layer contains 50 wt% or more of a thermoplastic resin having a VICAT softening temperature (JIS-K7206) of 65 ° C or lower.

10. The image-receiving sheet material according to claim 9, wherein the thermoplastic resin has a melt flow rate (JIS-K7210: 190 ° C., 2.16 kgf) of 50 or less.

11: Y of thermoplastic resin melt flow rate (JIS-K7210: 190 ° C., 2.16 kgf), amount of polyolefin added (w) in releasable cushion layer
The image receiving sheet material according to claim 10, wherein Y ≦ (25 / e ^0.06X ) when X is (t%).

12: The image-receiving sheet material according to claim 9, wherein the thermoplastic resin has a polymerized unit derived from ethylene.

13: The softening temperature (JIS-K2207) of the polyolefin contained in the releasable cushion layer is 100.
9. The image-receiving sheet material according to claim 8, which has a temperature of not less than ° C.

14: The image-receiving sheet material according to claim 8, wherein the polyolefin contained in the releasable cushion layer is polyethylene and / or polypropylene.

15: At least an image-releasing cushion layer capable of peeling an image-forming layer and an image-forming layer are sequentially coated on a support, and the image-forming layer is transferable to the image-forming material. An image forming material, wherein the functional cushion layer contains a cross-linked product of an organic polymer having a carbon-carbon double bond in a main chain or a side chain.

16: The image-forming material according to claim 15, wherein the organic high-molecular polymer has a polymerized unit derived from a diene compound.

17: The image forming material according to claim 16, wherein the releasable cushion layer contains a metal salt of a long-chain organic acid.

(18) The long-chain organic acid metal salt contains at least one of a long-chain organic acid cobalt salt and a long-chain organic acid manganese salt.
The image forming material described.

19: The image forming material according to claim 16, wherein the crosslinked product is an oxidatively crosslinked product.

20: The image forming material according to claim 16, wherein the releasable cushion layer contains an antioxidant in an amount of 1 to 5 wt%.

21: The antioxidant has at least one or more phenolic hydroxyl groups.
The image forming material described in 0. 22: The image forming material according to claim 16, wherein the organic high molecular polymer is polybutadiene.

23: An image-receiving sheet having a releasable cushion layer on a support capable of receiving the image layer formed on the image-forming material and retransferring only the received image layer, wherein the release The image-receiving sheet material, wherein the functional cushion layer contains a cross-linked product of an organic polymer having a carbon-carbon double bond in the main chain or side chain.

24: The image-receiving sheet material according to claim 23, wherein the organic high-molecular polymer has a polymerized unit derived from a diene compound.

25: The image-receiving sheet material according to claim 24, wherein the releasable cushion layer contains a long-chain organic acid metal salt.

26: The long-chain organic acid metal salt contains at least one of a long-chain organic acid cobalt salt and a long-chain organic acid manganese salt.
The image-receiving sheet material described.

27: The image-receiving sheet material according to claim 24, wherein the crosslinked product is an oxidatively crosslinked product.

28: The image-receiving sheet material according to claim 24, wherein the releasable cushion layer has an antioxidant of 1 to 5 wt%.

(2) The antioxidant has at least one or more phenolic hydroxyl groups.
The image-receiving sheet material described.

30: The image-receiving sheet material according to claim 24, wherein the organic high molecular weight polymer is polybutadiene.

31: In the method for producing a releasable cushion layer capable of peeling an image forming layer on a support, a releasable mold containing an organic polymer having a carbon-carbon double bond in its main chain or side chain Of a releasable cushion layer comprising melting the organic cushion layer composition at a temperature not lower than the thermal stability limit temperature of the organic polymer and coating or laminating it on a support in the presence of oxygen. Method.

32: The release cushion layer composition contains 1 to 5 wt% of an antioxidant.
The method for producing a releasable cushion layer as described above.

33: The method for producing a releasable cushion layer according to claim 31, wherein the organic high molecular polymer has a polymerized unit derived from a diene compound.

34: 170 ° C. of a releasable cushion layer composition containing 1 to 5 wt% of polybutadiene and an antioxidant
A method for producing a releasable cushion layer, which comprises coating or laminating on a support in a molten state at ˜250 ° C.

35: A method for producing a releasable cushion layer from which the image forming layer can be peeled off, by applying a solution of the releasable cushion layer composition dissolved in an organic solvent and / or water on a support. In the main chain or side chain carbon-
After the release cushion layer composition containing an organic polymer having a carbon double bond is applied or at the same time, heat treatment is performed at a temperature of 100 ° C. to 130 ° C. in the presence of oxygen on the surface of the release cushion layer. A method for producing a releasable cushion layer, the method comprising:

36: The method for producing a releasable cushion layer according to claim 35, wherein the organic high molecular polymer has a polymerized unit derived from a diene compound.

37: The method for producing a releasable cushion layer according to claim 35, wherein the releasable cushion layer composition contains a long-chain organic acid metal salt.

38: A releasable cushion layer composition, which contains 1 to 5 wt% of an antioxidant.
The method for producing a releasable cushion layer as described above.

[0046]

In the conventional technique for transferring only the image onto the final support (image-receiving paper), the transferable condition range, that is, the transfer of the image area, when the paper having large unevenness such as matte paper is used as the image-receiving paper There is a problem in that the temperature / pressure condition range that satisfies both (conformability to unevenness) and releasability of the non-image area from the image receiving paper is narrow, and strict environment / device management is required, resulting in a heavy work load. This defect is improved by the present invention, that is, the temperature / pressure condition range in which the transfer of the image part (following unevenness) and the releasability of the non-image part from the image receiving paper are compatible can be widened.
Work load can be greatly reduced.

More specifically, by using the releasable cushion layer of the present invention, an image can be received with a single releasable cushion layer composition without impairing the cushioning property of the releasable cushion layer. Improves releasability from paper,
It has become possible to obtain a proofing image excellent in printed matter approximation in which the paper surface of the non-image area is exposed, without using strict management of environment and equipment, by using more kinds of paper as the image receiving paper.

As a transfer method, a direct transfer method in which an image formed on an image forming material is directly transferred to a final support (image receiving paper), and a formed image is temporarily transferred to an image receiving sheet or the like, and then transferred from the image receiving sheet. Although there is an indirect transfer method for retransferring to the final support (image-receiving paper), the present invention is effective for both the direct transfer method and the indirect transfer method when applied to the releasable cushion layer when transferring to the final support. Is.

[0049]

DETAILED DESCRIPTION OF THE INVENTION The present invention is described in detail below.
In the image forming method of the present invention, an image portion is formed by performing image exposure and development on an image forming material having a photosensitive composition or the like, and the image portion is transferred to a final support (for example, printing actual paper) to form a transfer image. Is what you get. When the image forming method of the present invention is embodied as, for example, a multicolor image forming method, the basic method is as follows.

In the case of the direct transfer system, the first color colored image is formed on the first color colored image forming material, the colored image is transferred onto the final support, and the support is peeled off. Further, after forming the second color colored image on the second color colored image forming material, the second color register image formed thereby is registered with the first color register image of the final support, The second color image is transferred onto the one color image, and the support is peeled off.
Obtain color-matched images. Similarly, the third color and the fourth color
The colored image is also transferred onto the final support to obtain a multicolor image. This type of method is disclosed in Japanese Patent Application Laid-Open No. 47-41830.
Nos. 59-97140, 60-28649 and U.S. Pat. No. 3,775,113.

Although the image forming materials of the present inventions 1 to 7 and 15 to 22 can be used in an image forming method of an indirect transfer system, they are mainly used in a direct transfer system. Invention 8 to 1
The image receiving sheet materials of Nos. 4, 23 to 30 are used in the image forming method of the indirect transfer system.

In the image forming method of the present invention, the image forming material is usually imagewise exposed through a color separation mask or the like and then developed to form an image. At this time, from the image obtained on the support, only the image portion is directly or indirectly transferred and laminated on the final support. In this case, the releasable cushion layer according to the present invention is provided on the surface of the support in order to efficiently perform the transfer to the final support and facilitate the peeling of the support after the image transfer.

The resin used in the releasable cushion layer of the present invention preferably has a VICAT softening temperature of -30 to 65 ° C. The VICAT softening temperature here is JI.
The value measured by the A method shown in S-K7206-1991. The value obtained by making and measuring a test piece having a thickness of 3 mm is V
Let ICAT softening temperature.

The thermoplastic resin used in the releasable cushion layer of the present invention has a softening point of an organic polymer substance of about 65 ° C. or lower, preferably 60 ° C. or lower, according to the VICAT method.
Particularly preferably, it is 50 ° C. or less. Softening point is about 6
Specific examples of those having a temperature of 5 ° C. or less include polyolefins such as polyethylene and polypropylene, ethylene copolymers such as ethylene and vinyl acetate or ethylene and acrylate, polyvinyl chloride, and vinyl chloride copolymers such as vinyl chloride and vinyl acetate. Coalesce, polyvinylidene chloride, vinylidene chloride copolymer, polystyrene, styrene copolymer such as styrene and (meth) acrylic acid ester, polyvinyltoluene, vinyltoluene copolymer such as vinyltoluene and (meth) acrylic acid ester, poly (Meta)
Acrylic ester, copolymer of butyl (meth) acrylate and (meth) acrylic acid ester such as vinyl acetate, vinyl acetate copolymer nylon, copolymerized nylon, polyamide resin such as N-alkoxymethylated nylon, synthetic rubber , At least one selected from organic polymer substances such as chlorinated rubber is preferable, but "Handbook of Plastic Performance" (edited by Japan Plastics Industry Federation, All Japan Plastics Molding Federation, published by Industrial Research Board, 1968, 10)
It is possible to use an organic polymer substance having a softening point of about 65 ° C. or less (issued on May 25th). It is also possible to add various plasticizers compatible with the polymer substance to these organic polymer substances to lower the substantial softening point. Furthermore, by adding a plasticizer compatible with an organic polymer substance having a softening point of 65 ° C. or higher, the softening point is substantially increased to 6
It is possible to lower the temperature to 5 ° C or lower.

Particularly in the present inventions 1 to 14, the melt flow rate (JIS-K7210: 19) is selected from the above.
A thermoplastic synthetic resin having a temperature of 0 ° C. and 2.16 kgf) of 50 or less is preferably used. Further, in particular, the melt flow rate of the thermoplastic resin (JIS-K7210: 190 ° C.,
When 2.16 kgf) is Y and the additive amount (wt%) of polyolefin in the release cushion layer is X, Y ≦ (25
/ E ^0.06X ) It is preferable to determine the amount of polyolefin added so as to satisfy the condition. And, in the thermoplastic resin, having a polymerized unit derived from ethylene,
The softening temperature (JIS-K2207) of the polyolefin contained in the releasable cushion layer is 100 ° C. or higher,
The polyolefin contained in the releasable cushion layer is preferably polyethylene and / or polypropylene.

The polyolefin having a number average molecular weight of 1,000 to 15,000 used in the release cushion layers of the present invention 1 to 14 is, for example, a (co) polymer of ethylene, propylene, butene, pentene or the like. Specific examples include polyethylene, polypropylene, ethylene-propylene copolymers, ethylene-butene copolymers, and the like.

[Diene Compound] The crosslinked product of the organic high molecular polymer having a carbon-carbon double bond in the main chain or the side chain used in the releasing cushion layer of the present invention 15 to 38 is an organic high polymer. It is preferable to have a polymer derived from a diene compound in the coalescence. The diene compound is a compound having two carbon-carbon double bonds in the same molecule, and specific examples thereof include butadiene, isoprene, chloroprene and isobutylene. As the polymer having these as polymerized units, polybutadiene, polyisoprene, polychloroprene, styrene-butadiene copolymer, isobutylene-isoprene copolymer, acrylonitrile-butadiene copolymer, ethylene-propylene-butadiene copolymer, etc. Is mentioned.

[Long-Chain Organic Acid Metal Salt] The releasable cushion layers of the present inventions 15 to 38 preferably contain a long-chain organic acid metal salt. As the long-chain organic acid species of the long-chain organic acid metal salt, naphthenic acid, octylic acid, octenoic acid, octoeic acid, etc. are used, and as the metal species, cobalt, manganese, lead, calcium, cerium, zirconium, zinc, iron, Copper or the like is used, and cobalt and manganese are particularly preferable.

[Antioxidant] The antioxidant in the inventions 15 to 38 is a radical chain inhibitor (primary antioxidant).
Alternatively, it refers to a peroxide decomposing agent (secondary antioxidant). As a radical chain inhibitor, 2,6-di-t-butyl-p
-Monolephenols such as cresol, 2,6-di-t-butyl-4-ethylphenol, stearyl-β- (3,5-di-t-butyl-4-hydroxyphenyl) propionate, 2,2-methylene -Bis- (4-methyl-
6-t-butylphenol), 4,4′-thiobis-
Bisphenol-based compounds such as (3-methyl-6-t-butylphenol), 1,1,3-tris- (2-methyl-4-)
Polymeric phenolic compounds such as hydroxy-5-t-butylphenyl) butane, tetrakis- [methylene-3- (3 ', 5'-di-t-butyl-4'-hydroxyphenyl) propionate] methane, 1- Examples include amine-based compounds such as (N-phenylamino) -naphthalene. Examples of the peroxide decomposer include sulfur-based agents such as dilauryl thiodipropionate and dimyristyl thiodipropionate, and phosphorus-based agents such as triphenyl phosphite and diphenyl isodecyl phosphite.

The method for providing the releasable cushion layer on the support is as follows: (1) A solution prepared by dissolving a resin in an organic solvent is applied on the support, dried with hot air or heat, and then covered with a cover sheet. , So-called dry laminating method of laminating by pressure bonding under heating (2) While heating the resin as it is and keeping it in a molten state,
So-called hot melt, which is applied on a support by a doctor blade method, roll coating method, gravure method, reverse roll method, etc., immediately adheres a cover sheet, heats it if necessary at a high temperature, and then cools it. Lamination method (3) While heating the resin as it is and keeping it in a molten state,
Extruded on a support by an extruder, and while this is in a molten state, the cover sheet is pressed and laminated,
So-called extrusion laminating method (4) Using a plurality of extruders or an extruder having a plurality of extrusion ports on a support by the melt extrusion method,
A so-called co-extrusion method in which a layer made of two or more types of resin is formed on a support by one molding, and a cover sheet is similarly pressed and laminated while this is in a molten state. A solution dissolved in a solvent or water is applied on a support and dried by hot air or heating. A so-called solution coating method. (6) The resin is dissolved while heating in an organic solvent that does not dissolve the resin at room temperature, and the resin is cooled. Thus, a method in which a resin solid dispersion in an organic solvent is obtained, coated on a support, dried, and calendered as necessary, thereby fusing the resin solid fine particles to form a layer, etc. As the cover sheet used in (1) to (4), those similar to those used for a support described later can be used.

In the case of producing a releasable cushion layer containing a crosslinked product of an organic polymer having a carbon-carbon bond in the main chain or side chain of the present inventions 15 to 30, a releasable cushion layer composition is prepared. Is melted at a temperature not lower than the thermal stability limit temperature of the organic high molecular weight polymer and coated or laminated on a support in the presence of oxygen, or a releasable cushion layer composition is treated with an organic solvent. And / or after the solution dissolved in water is applied onto the support or at the same time, the surface of the releasable cushion layer is subjected to heat treatment at a temperature of 100 to 130 ° C. It is preferable to use this method. Further, it is preferable that the releasable cushion layer composition contains 1 to 5 wt% of an antioxidant, and in the case of a production method in which a heat treatment is carried out after coating or at the same time, a long-chain organic acid metal is further added. It is preferable to include a salt.

Which of the above-mentioned methods is used to manufacture the releasable cushion layer of the present invention is preferably appropriately selected depending on the properties of the resin and the releasable cushion layer composition.

The releasable cushion layer of the present invention has a thickness of 20.
˜70 μm is preferable, and 25 to 50 μm is more preferable.

The material of the support used in the image-forming material of the present invention and the image-receiving sheet material of the present invention is arbitrary, but a polyester film, particularly a biaxially stretched polyethylene terephthalate film, has strength, dimensional stability against water and heat, It is preferable in terms of economy. In addition, acetate film,
A polyvinyl chloride film, a polyethylene film, a polypropylene film or the like can be used. The thickness is not particularly limited, but when used as a support, it is preferably about 20 to 150 μm, and particularly preferably about 20 to 50 μm from the viewpoints of workability, economy and the like.

For the image forming layer in the image forming material of the present invention, a photosensitive composition having a sensitivity to actinic rays can be used. The structure may be a one-layer structure or a multilayer structure of two or more layers. In the case of a multilayer structure, at least one or more layers may have an image forming ability. Colorants such as dyes can be included.

As the photosensitive composition used in the image forming layer of the present invention, a known positive type photosensitive composition / negative type photosensitive composition can be used. It is preferable to use a photosensitive composition containing a quinonediazide compound. The o-quinonediazide compound is
Any substance can be used as long as it can function as a photosensitizer. Specifically, for example, 1,2-benzoquinonediazide-4-sulfonyl chloride, 1,2-naphthoquinonediazide-4-sulfonyl chloride, 1,2-naphthoquinonediazide-5-sulfonylchloride,
A compound obtained by condensing 2-naphthoquinonediazide-6-sulfonyl chloride and a compound containing a hydroxyl group and / or an amino group is preferably used.

Examples of the hydroxyl group-containing compound include trihydroxybenzophenone, dihydroxyanthraquinone, bisphenol A, phenol novolac resin, resorcin benzaldehyde condensation resin and pyrogallol acetone condensation resin. Examples of the amino group-containing compound include aniline, p-aminodiphenylamine,
There are p-aminobenzophenone, 4,4'-diaminodiphenylamine, 4,4'-diaminobenzophenone and the like.

With regard to the quinonediazide compounds, including the ones described here, see J. Koser (J. Kosa)
r) "Light Sensitive System" (Light
Sensitive System (New York City, John Wiley and Sons, 1965), and Nagamatsu, Inui co-authored "Photosensitive Polymers" (Kodansha, 1
1977).

As the negative photosensitive composition, a photopolymerizable photosensitive composition is preferable. Specifically, for example, as the photopolymerizable compound, any of those generally used can be arbitrarily used. For example, at least one compound arbitrarily selected from the compound group consisting of acrylic acid, methacrylic acid, acrylic acid ester and methacrylic acid ester can be used. For example, ethylene glycol diacrylate, glycerin triacrylate, polyacrylate, ethylene glycol dimethacrylate, 1,3
-Propanediol dimethacrylate, 1,2,4-butanetriol trimethacrylate, polyethylene glycol dimethacrylate, trimethylolethane triacrylate, pentaerythritol dimethacrylate,
Pentaerythritol trimethacrylate, pentaerythritol tetramethacrylate, pentaerythritol diacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol polyacrylate, 1,3-propanediol diacrylate, 1,5-pentanediol dimethacrylate, polyethylene Examples thereof include, but are not limited to, glycol bisacrylate and bismethacrylate.

A photopolymerization initiator may be contained in the negative photosensitive composition. In this case, the photopolymerization initiator is optional, but a photopolymerization initiator having less absorption in the visible region is more preferable, and examples of such a photopolymerization initiator include the following compounds. However, it is not limited to these. That is, benzophenone, Michler's ketone [4 ', 4'-bis (dimethylamino) benzophenone], 4,4'-bis (diethylamino) benzophenone, 4-methoxy-
Aromatic ketones such as 4'-dimethylaminobenzophenone, 2-ethylanthraquinone, phenanthraquinone, and other aromatic ketones, benzoin ethers such as benzoin, benzoin methyl ether, benzoin ethyl ether and benzoin phenyl ether. , Methylbenzoin, ethylbenzoin and other benzoins, and 2- (o-chlorophenyl)-
4,5-Diphenylimidazole double body, 2- (o-chlorophenyl) -4,5- (m-methoxyphenyl) imidazole double body, 2- (o-fluorophenyl)-
4,5-diphenylimidazole double body, 2- (o-methoxyphenyl) -4,5-diphenylimidazole double body, 2- (p-methoxyphenyl) -4,5-diphenylimidazole double body, 2,4-di (P-Methoxyphenyl) -5-phenylimidazole double body, 2-
(2,4-Dimethoxyphenyl) -4,5-diphenylimidazole duplex, 2- (p-methylmercaptophenyl) -4,5-diphenylimidazole duplex, and U.S. Pat. No. 3,479,185, British Patent 1 , 047,
Mention may be made of 2,4,5-triacrylimidazole duplexes, such as the similar duplexes described in US Pat. No. 569 and US Pat. No. 3,784,557.

Other photopolymerizable compounds include 2,4-
Thioxanthones such as diethylthioxanthone can also be used. In this case, known compounds such as p-dimethylaminobenzoic acid isoamyl ester, p-dimethylaminobenzoic acid ethyl ester, N-methyldiethanolamine, and bisdiethylaminobenzophenone can be used as the photopolymerization accelerator.

Next, the photosensitive composition of the present invention can contain known polymer compounds and synthetic resins, and has a polymer having a carboxylic acid vinyl ester polymerization unit represented by the following general formula in its molecular structure. It is preferable to contain a compound.

[0073]

Embedded image

However, R represents an alkyl group, and also includes an alkyl group having a substituent. Any polymer compound having the structure as described above can be used arbitrarily, but as the carboxylic acid vinyl ester monomer for constituting the polymerized unit represented by the above general formula, the following examples are preferable. The name and chemical formula are shown together.

1 vinyl acetate CH ₃ COOCH = CH ₂ 2 vinyl propionate CH ₃ CH ₂ COOCH = CH ₂ 3 vinyl butyrate CH ₃ (CH ₂ ) ₂ COOCH = CH ₂ 4 vinyl pivalate (CH ₃ ) ₃ CCOOCH = CH ₂ 5 vinyl caproate _{CH 3 (CH 2) 4 COOCH} = CH 2 6 caprylic vinyl _{CH 3 (CH 2) 6 COOCH} = CH 2 7 capric acid vinyl _{CH 3 (CH 2) 8 COOCH} = CH 2 8 vinyl laurate CH ₃ (CH ₂ ) ₁₀ COOCH = CH ₂ 9 vinyl myristate CH ₃ (CH ₂ ) ₁₂ COOCH = CH ₂ 10 vinyl palmitate CH ₃ (CH ₂ ) ₁₄ COOCH = CH ₂ 11 vinyl stearate CH ₃ (CH ₂ ) ₁₆ COOCH = _CH 2 12 Sachikku acid vinyl

[0076]

Embedded image

(R ¹ and R ² are alkyl groups, and the sum of the carbon atoms thereof is 7. That is, R ¹ + R ² = C ₇ H ₁₆ is obtained.) The polymer compound is a carboxylic acid vinyl ester of 1 The polymer may be a polymer obtained by polymerizing a seed, or a polymer obtained by copolymerizing two or more kinds of carboxylic acid vinyl ester, and may be any component ratio of the carboxylic acid vinyl ester and another monomer copolymerizable therewith. May be a copolymer of

Examples of the monomer unit which can be used in combination with the polymer unit represented by the above general formula include ethylenically unsaturated olefins such as ethylene, propylene, isobutylene, butadiene and isoprene, for example, styrene and α-methyl. Styrene, p-methylstyrene, p-
Styrenes such as chlorostyrene, acrylic acids such as acrylic acid and methacrylic acid, for example itaconic acid, maleic acid, unsaturated aliphatic dicarboxylic acids such as maleic anhydride, such as diethyl maleate, dibutyl maleate,
Diesters of unsaturated dicarboxylic acids such as di-2-ethylhexyl maleate, dibutyl fumarate, di-2-ethylhexyl fumarate, for example, methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, acrylic acid Phenyl, α-methyl methyl acrylate, methyl methacrylate, α-methylene aliphatic monocarboxylic acid esters such as ethyl methacrylate, for example, acrylonitrile, nitriles such as methacrylonitrile, for example, amides such as acrylamide, for example, acrylanilide Anilides such as p-chloroacrylanilide, m-nitroacrylanilide and m-methoxyacrylanilide, for example, methyl vinyl ether, ethyl vinyl ether, isobutyl vinyl ether, β-chloroethyl vinyl ether Vinyl ethers, vinyl chloride, vinylidene chloride, vinylidene cyanide, such as 1-methyl-1-methoxyethylene, 1,1-dimethoxyethylene, 1,2-ethylene, 1,1
Ethylene derivatives such as dimethoxycarbonylethylene and 1-methyl-1-nitroethylene, for example, N-vinyl such as N-vinylpyrrole, N-vinylcarbazole, N-vinylindole, N-vinylpyrrolidene and N-vinylpyrrolidone There are vinyl monomers such as compounds. These monomer units have a structure in which the unsaturated double bond is cleaved and are present in the polymer compound.

Particularly preferred as the polymer compound used in the image forming layer of the present invention is one having a vinyl acetate polymer unit in the molecular structure. Among these, those having 40 to 95% by weight of vinyl acetate polymer units, those having a number average molecular weight (MN) of 1,000 to 60,000 and those having a weight average molecular weight (MW) of 500 to 150,000 are preferable. .

More preferably, a polymer compound having a vinyl acetate polymer unit (particularly 40 to 95% by weight) and a carboxylic acid vinyl ester polymer unit having a longer chain than vinyl acetate is preferable, and particularly, a number average molecular weight (MN). Is 2,000
0-60,000, weight average molecular weight (MW) of 10,000
It is preferably from 00 to 150,000.

In this case, the monomer constituting the polymer compound having vinyl acetate polymerized units by copolymerization with vinyl acetate may be any monomer as long as it can form a copolymer. You can choose it from your body.

The copolymers that can be used as the polymer compound in the image forming layer of the invention are listed below by showing the monomer components. However, as a matter of course, the present invention is not limited to the following example.

1 vinyl acetate-ethylene 2 vinyl acetate-styrene 3 vinyl acetate-crotonic acid 4 vinyl acetate-maleic acid 5 vinyl acetate-2-ethylhexyl acrylate 6 vinyl acetate-di-2-ethylhexyl maleate 7 vinyl acetate-methyl vinyl ether 8 Vinyl Acetate-Vinyl Chloride 9 Vinyl Acetate-N-Vinyl Pyrrolidone 10 Vinyl Acetate-Vinyl Propionate 11 Vinyl Acetate-Vinyl Pivalate 12 Vinyl Acetate-Varsatic Acid Vinyl 13 Vinyl Acetate-Vinyl Laurate 14 Vinyl Acetate-Vinyl Stearate 15 Vinyl acetate-vinyl versatate-ethylene 16 Vinyl acetate-vinyl versatate-2-ethylhexyl acrylate 17 Vinyl acetate-vinyl versatate-vinyl laurate 18 Vinyl acetate-bar Vinyl tic acid - crotonic acid 19 vinyl propionate - vinyl versatate 20 vinyl propionate - vinyl versatate - crotonic acid 21 pivalate - vinyl stearate - maleic acid

The photosensitive composition of the present invention can be used as an image forming material. For example, it can be used as a colored image forming material for use as a color proof. In this case, the image forming layer of the colored image forming material, that is, the colored photosensitive layer, is removed in an image form by development following imagewise exposure to form a colored image portion.

Dyes and / or pigments are added as colorants in the colored photosensitive layer. In particular, when used for color proofing, pigments and dyes having the same color as the required ordinary colors, that is, yellow, magenta, cyan, and black are required, but other metal powders, white pigments, and fluorescent pigments are required. Also used. When applying the present invention to a color proof, many pigments and dyes known in the art can be used, as described below.

(C.I means color index). Victoria Pure Blue (CI 42595) Auramine (CI 41000) Katilon Brilliant Flavin (CI Basic 1)
3) Rhodamine 6GCP (CI 45160) Rhodamine B (CI 45170) Safranine OK 70: 100 (CI 50240) Erioglaucin X (CI 42080) Fast Black HB (CI 26150) No. 1201 Lionol Yellow (CI 2109
0) Lionol Yellow GRO (CI 21090) Shimla First Yellow 8GF (CI 2110
5) Benzidine Yellow 4T-564D (CI 2109)
5) Shimla Fast Red 4015 (CI 1235)
5) Lionol Red 7B4401 (CI 15830) Fastgen Blue TGR-L (CI 7416)
0) Lionol Blue SM (CI 26150) Mitsubishi Carbon Black MA-100 Mitsubishi Carbon Black # 30, # 40, # 50

When a colorant is used in the present invention, the ratio of the colorant / components other than the colorant in the colored photosensitive layer may be determined by those skilled in the art in consideration of the target optical density and the removability of the colored photosensitive layer from a developing solution. It can be determined by a known method. For example, in the case of a dye, its content is preferably 5% by weight.
In the case of a pigment, the content is preferably 5% to 90% by weight.

The film thickness of the colored photosensitive layer is determined by a method known to those skilled in the art according to the target optical density, the type of coloring agent (dye, pigment, carbon black) used in the colored photosensitive layer and the content thereof. but it is, preferably typically the is used in the range of ^{0.1g / m 2 ~5g / m 2} .

In carrying out the present invention, a plasticizer, a coatability improver and the like may be further added to the photosensitive composition, if necessary. Examples of the plasticizer include various low molecular compounds such as phthalates, triphenyl phosphates and maleates, and examples of the coating improver include surfactants such as a fluorine-based surfactant and ethyl cellulose polyalkylene ether. Nonionic activators and the like.

A protective layer may be used in the image forming material of the present invention, if necessary. Any known protective layer can be used. It is preferable to dissolve or disperse in a developer during development. Specifically, polyvinyl alcohol, celluloses and the like can be used.
However, the gas permeability is appropriately selected according to the type of the image forming layer to be used. That is, when a photosensitive composition that generates gas upon exposure, such as o-quinonediazide, is used for the image forming layer, it is preferable to provide a protective layer having good gas permeability, and a photopolymerizable photosensitive composition In the case of using an image-forming layer such as an object whose image formation is inhibited by oxygen in the air at the time of exposure, it is preferable to provide a protective layer having low gas permeability.

The thickness of the protective layer is about 0.01 to 5 μm, particularly 0.03 to 1 μm, because of its effect and influence on the developing solution.
About m is preferable.

As the developer used for developing the image forming material of the present invention, any developer can be used as long as it has a developing action for developing the image forming material. Specific examples thereof include the developing solution and the developing treatment method described in Japanese Patent Application No. 5-233759.

[0093]

EXAMPLES Examples of the present invention will be described below together with comparative examples. However, the present invention is not limited by the examples described below. <Production of Support Having Releasable Cushion Layer> Tables 1 to 3
The releasable cushion layer composition having the contents shown in Table 1 is the one described in Table 2 and Table 3 by the melt extrusion laminating method (resin temperature = 235 ° C., discharge rate = 50 kg / H). Was manufactured according to the method described in each table.

Example 1 A colored photosensitive layer (image forming layer) dispersion having the following composition was prepared. For the dispersion, use a valve homogenizer at 5 kgf /
It was carried out by passing it under the condition of cm ² .

[Colored Photosensitive Layer Dispersion] -Esterification product of p-cresol novolac resin and naphthoquinone-1,2-diazide-4-sulfonic acid chloride 0.616 g-Vinyl acetate-vinyl versatic acid copolymer (weight) Ratio 80:20, weight average molecular weight = 50,000, 50% methanol solution) 8.768 g-the following pigments <the following amount> -methyl ethyl ketone 35.2 g

<Pigment> Black: Carbon black MA-100 (manufactured by Mitsubishi Chemical Co., Ltd.) 0.99 g Cyan: Lionol Blue FG-7330 (manufactured by Toyo Ink Co., Ltd.) 0.55 g Magenta: Lionol Red 6BFG- 4219X (manufactured by Toyo Ink Co., Ltd.) 0.68 g Yellow: Rionol Yellow No. 1206 (manufactured by Toyo Ink Co., Ltd.) 0.68g

The prepared support No. On the releasable cushion layer of the support having the releasable cushion layer of No. 1, the above dispersion liquid was applied so that the film thickness after drying was 1.8 μm.
After drying, a 4-color positive working type photosensitive colored image-forming material was obtained. The releasable cushion layer does not change even when the colored photosensitive layer dispersion liquid is applied and dried.
There was no problem in manufacturing. Further, the surface of the releasable cushion layer did not change even when methyl ethyl ketone, which is a solvent for the colored photosensitive layer dispersion, was dropped and allowed to stand for 5 minutes and then wiped off.

On the polyethylene terephthalate film surface of the obtained 4-color photosensitive colored image-forming material, a color-separating network positive film of each color was adhered so that the image after development would be a reverse image when viewed from the photosensitive layer side, and 4 kw 5 with metal halide lamp
Image exposure was performed for about 60 seconds from a distance of 0 cm, further immersed in the following developer at 32 ° C. for 30 seconds, and developed by rubbing with a sponge to obtain a colored image of four colors from which the exposed portions were removed.

[Developer] -Konica PS plate developer SDP-1 (manufactured by Konica Corporation) 40 ml-Perex NB-L (surfactant: manufactured by Kao Atlas Co., Ltd.) 100 ml-Distilled water 400 ml Next, yellow The image surface of the color image and the matte paper (New Age: manufactured by Shin Oji Paper Co., Ltd.) are brought into close contact with each other, and a pair of nip rolls heated to 80 ° C. is pressed under a pressure condition of 3.5 kgf / cm ² . 0.5 m / min. After passing through at a speed of, the support was immediately peeled off. Peeling was easily performed at the interface between the cushion layer and the colored image, and the yellow image was transferred onto the matte paper. Continue to magenta, cyan,
The colored images were transferred in the order of black, and the entire surface was exposed with a 4 kW metal halide lamp from a distance of 50 cm for about 120 seconds to obtain a proofing image of four colors formed on the matte paper.

Only the colored image portion was transferred onto the matte paper. That is, the paper surface of the non-image portion was exposed, and no background stain was observed in the non-image portion. Even if the temperature of the nip roll at the time of transfer was 85 ° C, an image was obtained which was the same as that at 80 ° C.

Expert skilled in printing 15 of the difference between this color proofing image and a printed matter using the same original document / paper.
Evaluation results of printed matter approximation by humans, evaluation results of image transfer temperature stability during proofing image production (70 ° C, 75 ° C,
Table 4 shows the production suitability evaluation results of the releasable cushion layer used (80 ° C, 85 ° C, 90 ° C).

Examples 2-31 and Comparative Examples 1-27 A photosensitive image forming material was obtained in the same manner as in Example 1 except that the support having releasability used was changed as shown in Table 4. Was used to transfer at a temperature shown in Table 4 to obtain a proofing image. The proofing image and the releasable cushion layer were also evaluated in the same manner as in Example 1. Table 4 shows the results.

Examples 32 to 62, Comparative Examples 28 to 54 A polyethylene terephthalate film having a thickness of 75 μm (Lumirror T-60: manufactured by Toray Industries, Inc.) was used, and a thickness of 30 was applied.
A support No. having a releasable cushion layer formed by extruding a polypropylene (Hypol J800: manufactured by Mitsui Petrochemical Co., Ltd.) having a thickness of μm and having a releasable cushion layer. I got 33.

The support having releasability used was No. 33
A four-color photosensitive image-forming material was obtained in the same manner as in Example 1 except that the color-separating net positive film of each color was applied to the polyethylene terephthalate film surface of the obtained four-color photosensitive colored image-forming material. The developed image was closely contacted so as to be a normal image when viewed from the photosensitive layer side, image exposure was performed with a 4 kw metal halide lamp from a distance of 50 cm for about 60 seconds, and development processing was performed in the same manner as in Example 1, and the exposed portion was exposed. A removed colored image was obtained.

Then, the image surface of the black color image and the support having the releasable cushion layer shown in Table 5 were used as an image receiving sheet, and the releasable cushion layer surface was brought into close contact with the support and heated to 80 ° C. 3.5kgf / cm between the pair of nip rolls
0.5m / min in ² of pressure conditions. After passing through at a speed of 2, the support of the photosensitive image forming material was peeled off. Peeling was easily performed at the interface between the cushion layer of the photosensitive image forming material and the colored image, and the black image was transferred onto the image receiving sheet. Subsequently, the colored images were transferred in the order of cyan, magenta, and yellow to form 4 on the image receiving sheet.
A colored image consisting of colors was obtained.

Subsequently, the colored image of four colors formed on the image receiving sheet and the matte paper (New Age: manufactured by Shin Oji Paper Co., Ltd.) were brought into close contact with each other and heated to the temperature shown in Table 1. 0.5 m / min between pairs of nip rolls at pressure conditions of 3.5 kgf / cm ^2. Immediately after passing at a speed of, the support was peeled in a direction in which the angle with the peeling surface was 150 degrees or more. Peeling is easily performed at the interface between the cushion layer of the image receiving sheet and the colored image, and the
A colored image of color was transferred. The entire surface was exposed with a 4 kW metal halide lamp from a distance of 50 cm for about 120 seconds to obtain a proofing image of four colors formed on the matte paper. The proofing image and the releasable cushion layer were also evaluated in the same manner as in Example 1. Table 5 shows the results.

Measuring method and measuring equipment-Softening temperature (applied to polyolefin having Mn = 1,000 to 15,000) Method: According to JIS-K2207. Vicat softening temperature (Mn = 1,000 to 15,000)
Other than the polyolefin of)) Method: According to JIS-K7206. Test load = 1.0
0 to 1.05 kgf-Melt flow rate (MFR) Method: According to JIS-K7210. Test temperature = 190
C, test load = 2.16 kgf Printed matter Printing machine-Mitsubishi DAIYA (manufactured by Mitsubishi Heavy Industries, Ltd.) Ink-Mark Five New (Toyo Ink Co., Ltd.)
Paper-New Age (Shin Oji Paper Co., Ltd.)

[0108]

[Table 1]

* 1-Viscole 330-P only GPC
Method, others are vapor osmotic pressure method * 2-Value of Y in the following calculation formula (2 significant digits) when X is the amount of addition of polyolefin (wt%) in the mold release cushion layer Calculation formula Y = (25 / e ^0.06X ) EVAFLEX P-1207, EVAFLEX P-
1407, EVAFLEX P-2505, EVAFL
EX-EEA A-702 (manufactured by Mitsui DuPont Polychemical Co., Ltd.) Mitsubishi Polyethylene EVA V401S, Mitsubishi Polyethylene EVA
V501H (manufactured by Mitsubishi Chemical Corporation) Petrosen 356 (manufactured by Tosoh Corporation) Sun Wax 151-P, Sun Wax 161-
P, Sun Wax LEL-250, Viscole 66
0-P, Viscor 330-P (Sanyo Chemical Co., Ltd.)
Made) Paraffin wax N-30 (135 paraffin)
(Made by Nippon Wax Co., Ltd.) Processing conditions-melt extrusion laminating method: resin temperature = 23
5 ° C., discharge rate = 50 kgf / H Softening temperature (applied to polyolefin with Mn = 1,000 to 15,000) Method: According to JIS K2207. Vicat softening temperature (Mn = 1,000 to 15,000)
Other than the polyolefin of)) Method: According to JIS-K7206. Test load = 1.0
0 to 1.05 kgf-Melt flow rate (MFR) Method: According to JIS-K7210. Test temperature = 190
℃, test load = 2.16kgf

[0110]

[Table 2]

* 1-The difference between the VICAT softening temperature (JIS-K7206) before heating and after heating in air for 3 minutes is 2
Temperature above 0 ° C * 2-Addition amount as metal content (to resin) * 3-Addition amount to resin JSR RB820, RB835 (Nippon Synthetic Rubber Co., Ltd.)
(Made by) EVAFLEX P-1407, EVAFLEX P-
1907 (manufactured by Mitsui DuPont Polychemical Co., Ltd.) Toughprene 315 (manufactured by Asahi Kasei Co., Ltd.) Sumilizer BHT <2,6-di-t-butyl-p-cresol> (manufactured by Sumitomo Chemical Co., Ltd.) Irganox 1010 <tetrakis- [Methylene-
3- (3 ', 5'-di-t-butyl-4'-hydroxyphenyl) propionate] methane> (manufactured by Ciba Geigy) Ionox 330 <1,3,5-trimethyl-2,
4,6-Tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene> (Shell Chemical Co., Ltd.)

[0112]

[Table 3]

* 1-Addition amount as metal content (to resin) * 2-To resin addition amount JSR RB820 (manufactured by Japan Synthetic Rubber Co., Ltd.) Tuftec H1052, Tuffprene 315 (manufactured by Asahi Kasei Co., Ltd.) Sumilizer BHT <2 , 6-Di-t-butyl-p-cresol> (Sumitomo Chemical Co., Ltd.) Irganox 1010 <tetrakis- [methylene-
3- (3 ', 5'-di-t-butyl-4'-hydroxyphenyl) propionate] methane> (manufactured by Ciba Geigy) Ionox 330 <1,3,5-trimethyl-2,
4,6-Tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene> (Shell Chemical Co., Ltd.)

[0114]

[Table 4]

[0115]

[Table 5]

Printed matter Printing machine-Mitsubishi DAIYA (manufactured by Mitsubishi Heavy Industries, Ltd.) Ink-Mark Five New (Toyo Ink Co., Ltd.)
Paper-New Age (Shin Oji Paper Co., Ltd.)

<< Evaluation / Rating Scale >><Evaluation of Suitability for Releasing Cushion Layer> Evaluation of Solvent Resistance (Methylethylketone) ○ -No change is observed on the surface even if the dropped solvent is wiped off with a cloth. When wiped off with a cloth, the surface properties such as gloss are changed. × -Wipe off the dropped solvent with a cloth to remove part or all of the releasable cushion layer. Manufacturing process load (upper layer coating solution heat retention) ○ -Upper layer No need to keep the coating solution warm (heating) during coating × − It is necessary to keep the coating solution warm (heating) during upper layer coating

<Proofing Image (Printed Material Similarity) Evaluation> (Evaluation was carried out on images prepared at the transfer temperatures shown in Table 1) Subjective evaluation (average opinion score) Same as each of the four color images obtained The difference from the printed matter obtained from the original document was evaluated by 15 printing experts based on the following scale, and the average value thereof is shown in the table as an average opinion score.

[Rating Scale] 5-Don't know the difference with the printed matter ... (Detection limit) 4-You can see the difference with the printed matter, but don't worry ...・ ・ (Allowable limit) 3-I am worried about the difference with the printed matter, but it does not get in the way ... ・ (Patience limit) 2-The difference with the printed matter is disturbing 1-The difference with the printed matter is very disturbing become

[0120]

<Evaluation of Image Transfer Temperature Stability (Transfer Temperature Latitude)> Image Part Transferability <Examples 1 to 31 and Comparative Examples 1 to 27> First, of the colored image forming materials obtained in each Example and Comparative Example. Of these, 40% flat screen image (175
L / inch), and subjected to image exposure and development processing under the same conditions as in Example 1 to form an image.

Image receiving paper (New Age, 110k)
(g, Shin-Oji Paper Co., Ltd.) under the temperature conditions shown in Table 4, the average number of halftone dot transfer defects occurring in 10 cm × 10 cm (5 arbitrary places).

<Examples 32 to 62 and Comparative Examples 28 to 5
4> First, of the colored image-forming materials obtained in each of Examples and Comparative Examples, a 40% flat screen image (175 L / inch) was brought into close contact with a black-colored image-forming material, and the image was formed under the same conditions as in Example 1. Form an image by exposing and developing.

This was brought into close contact with the image-receiving sheet material shown in Table 5,
3.5kg between a pair of nip rolls heated to 80 ℃
0.5 m / min. under a pressure condition of f / cm ² . After passing through the image forming material, the support of the image forming material was peeled off to transfer the image onto the image receiving sheet, and the image was transferred onto the image receiving paper (New Age, 110 kg, Shin Oji Paper Co., Ltd.) under the temperature conditions shown in Table 5. When transferred with, 10cm x 10cm (5 arbitrary places)
Average number of halftone dot transfer defects

Non-image area releasability <Examples 1 to 31 and Comparative Examples 1 to 27> First, among the colored image forming materials obtained in Examples and Comparative Examples, the black image forming material was compared with Example 1. The entire surface is exposed and developed under the same conditions to form the entire non-image area.

This is the image receiving paper (New Age, 110k
g, Shin-Oji Paper Co., Ltd.) and the ease of peeling when transferred under the temperature conditions shown in Table 4 and the surface property of the non-image area of the image receiving paper are evaluated by the following rating scale.

<Examples 32 to 62 and Comparative Examples 28 to 5
4> The image-receiving sheet material shown in Table 5 was transferred to an image-receiving sheet (New Age, 110 k
g, Shin-Oji Paper Co., Ltd.) and the ease of peeling when transferred under the temperature conditions shown in Table 5 and the surface property of the non-image area of the image receiving paper are evaluated by the following rating scale.

[Rating Scale] ○ -Easy peeling without change on the image receiving paper surface (peeling force 3 kgf
/ Less) ○ △ -Peeling is possible without change on the surface of the receiving paper, but somewhat difficult (peeling force 3 kgf / m or more) △ -Peeling is possible, but part of the surface of the receiving paper changes (surface peeling, roughening, etc.) △ × -Releasable, but part of the releasable cushion layer is transferred to the surface of the image receiving paper. × -Adhesion between the image receiving paper and the releasable cushion layer is strong and cannot be separated.

[0129]

Industrial Applicability The image forming material, the image-receiving sheet material and the releasable cushion layer which are excellent in print approximation, have a wide image transfer temperature latitude, have good image area transferability, and have excellent suitability for releasable cushion layer production. A method can be provided.

Claims (38)

[Claims] 1. An image forming material in which at least an image-forming layer capable of peeling a release cushion layer and an image-forming layer are sequentially coated on a support, and the image-forming layer is transferable to the image-forming material. Number average molecular weight of 1,000 to 1 in the elastic cushion layer
An image forming material comprising 5 to 40 wt% of 5,000 polyolefins. 2. The image forming material according to claim 1, wherein the releasable cushion layer contains 50 wt% or more of a thermoplastic resin having a VICAT softening temperature (JIS-K7206) of 65 ° C. or lower. 3. A melt flow rate of a thermoplastic resin (JI
The image forming material according to claim 2, wherein S-K7210: 190 ° C, 2.16 kgf) is 50 or less. 4. A melt flow rate of a thermoplastic resin (JI
S-K7210: 190 ° C., 2.16 kgf) Y, the amount of polyolefin added (wt%) in the releasable cushion layer
The image forming material according to claim 3, wherein Y ≦ (25 / e ^0.06X ) where X is X. 5. The image forming material according to claim 2, wherein the thermoplastic resin has a polymerized unit derived from ethylene. 6. The image forming material according to claim 1, wherein the polyolefin contained in the releasable cushion layer has a softening temperature (JIS-K2207) of 100 ° C. or higher. 7. The image forming material according to claim 1, wherein the polyolefin contained in the releasable cushion layer is polyethylene and / or polypropylene. 8. An image-receiving sheet material having a releasable cushion layer on a support, capable of receiving an image layer formed on an image-forming material and retransferring only the received image layer, wherein The mold cushion layer has a number average molecular weight of 1,000 to 1
An image receiving sheet material comprising 5 to 40 wt% of 5,000 polyolefins. 9. The image receiving sheet material according to claim 8, wherein the releasable cushion layer contains 50 wt% or more of a thermoplastic resin having a VICAT softening temperature (JIS-K7206) of 65 ° C. or lower. 10. A melt flow rate of a thermoplastic resin (J
IS-K7210: 190 ° C, 2.16 kgf) is 50
The image-receiving sheet material according to claim 9, wherein: 11. A melt flow rate of a thermoplastic resin (J
IS-K7210: 190 ° C, 2.16 kgf) Y,
Amount of polyolefin added to the releasable cushion layer (wt
The image receiving sheet material according to claim 10, wherein Y ≦ (25 / e ^0.06X ), where X is (%). 12. The image-receiving sheet material according to claim 9, wherein the thermoplastic resin has a polymerized unit derived from ethylene. 13. The image-receiving sheet material according to claim 8, wherein the polyolefin contained in the releasable cushion layer has a softening temperature (JIS-K2207) of 100 ° C. or higher. 14. The image-receiving sheet material according to claim 8, wherein the polyolefin contained in the releasable cushion layer is polyethylene and / or polypropylene. 15. An image-forming material to which at least an image-forming layer capable of peeling, a releasable cushion layer and an image-forming layer are sequentially coated on a support, and the image-forming layer is transferable, An image forming material, wherein the functional cushion layer contains a cross-linked product of an organic polymer having a carbon-carbon double bond in a main chain or a side chain. 16. An organic high-molecular polymer having a polymerized unit derived from a diene compound.
The image forming material described. 17. The image forming material according to claim 16, wherein the releasable cushion layer contains a metal salt of a long-chain organic acid. 18. The image forming material according to claim 17, wherein the long-chain organic acid metal salt contains at least one of a long-chain organic acid cobalt salt and a long-chain organic acid manganese salt. 19. The image forming material according to claim 16, wherein the crosslinked product is an oxidatively crosslinked product. 20. An antioxidant is added to the releasable cushion layer in an amount of 1 to
The image forming material according to claim 16, wherein the image forming material has 5 wt%. 21. The image forming material according to claim 20, wherein the antioxidant has at least one phenolic hydroxyl group. 22. The image forming material according to claim 16, wherein the organic high molecular polymer is polybutadiene. 23. An image receiving sheet having a releasable cushion layer on a support, the releasable cushion layer being capable of receiving an image layer formed on an image forming material and retransferring only the received image layer, The image-receiving sheet material, wherein the functional cushion layer contains a cross-linked product of an organic polymer having a carbon-carbon double bond in the main chain or side chain. 24. The organic high-molecular polymer has a polymerized unit derived from a diene compound.
The image-receiving sheet material described. 25. The image-receiving sheet material according to claim 24, wherein the releasable cushion layer contains a long-chain organic acid metal salt. 26. The image-receiving sheet material according to claim 25, wherein the long-chain organic acid metal salt contains at least one of a long-chain organic acid cobalt salt and a long-chain organic acid manganese salt. 27. The image-receiving sheet material according to claim 24, wherein the crosslinked product is an oxidatively crosslinked product. 28. An antioxidant is added to the releasable cushion layer in an amount of 1 to
25. The image-receiving sheet material according to claim 24, which has 5 wt%. 29. The image-receiving sheet material according to claim 28, wherein the antioxidant has at least one phenolic hydroxyl group. 30. The image-receiving sheet material according to claim 24, wherein the organic high molecular weight polymer is polybutadiene. 31. A method for producing a releasable cushion layer capable of peeling an image forming layer on a support, the method comprising a release comprising an organic polymer having a carbon-carbon double bond in a main chain or a side chain. Of a releasable cushion layer comprising melting the organic cushion layer composition at a temperature not lower than the thermal stability limit temperature of the organic polymer and coating or laminating it on a support in the presence of oxygen. Method. 32. The method for producing a releasable cushion layer according to claim 31, wherein the releasable cushion layer composition contains an antioxidant in an amount of 1 to 5 wt%. 33. An organic high molecular polymer having a polymerized unit derived from a diene compound.
The method for producing a releasable cushion layer as described above. 34. A polybutadiene and an antioxidant are added in an amount of 1 to
The releasable cushion layer composition containing 5 wt% is 170 ° C to 2
A method for producing a releasable cushion layer, which comprises coating or laminating on a support in a molten state at 50 ° C. 35. A method for producing a releasable cushion layer from which an image forming layer can be peeled off, by applying a solution of the releasable cushion layer composition dissolved in an organic solvent and / or water on a support. In the main chain or side chains after or simultaneously with the application of the release cushion layer composition containing an organic polymer having a carbon-carbon double bond, in the presence of oxygen on the surface of the release cushion layer, A method for producing a releasable cushion layer, which comprises performing heat treatment at a temperature of 100 ° C to 130 ° C. 36. An organic high molecular polymer having a polymerized unit derived from a diene compound.
The method for producing a releasable cushion layer as described above. 37. The method of producing a releasable cushion layer according to claim 35, wherein the releasable cushion layer composition contains a long-chain organic acid metal salt. 38. The method for producing a releasable cushion layer according to claim 35, wherein the releasable cushion layer composition contains 1 to 5 wt% of an antioxidant.