JPH03114057A - Image receiving sheet element - Google Patents

Abstract

PURPOSE:To prevent the generation of static electricity on a cover sheet and to improve the handling of an image receiving sheet by incorporating an antistatic agent into the cover sheet or forming a layer contg. the antistatic agent on the cover sheet. CONSTITUTION:An antistatic agent is incorporated into a cover sheet or a layer contg. the antistatic agent is formed on the cover sheet. For example, a polyethylene terephthalate film is coated with a coating soln. and dried to form an image receiving layer of 28mum thickness and a polyethylene cover sheet of 30mum thickness contg. 1% triethanolamine of dialkylphosphoric ester is laminated on the image receiving layer to produce an image receiving sheet element. The generation of static electricity on the cover sheet can be prevented and the handling of the image receiving sheet can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an image-receiving sheet element used primarily in the preparation of color proofs for color proofing.

``Prior art'' After forming an image on the release layer by exposing and developing a photosensitive 81-layer product consisting of a temporary support and a release layer made of an organic polymer and a photosensitive resin layer, an arbitrary The method of transferring onto a support is known and is described in Japanese Patent Publications Nos. 46-15326 and 49-4.
It is described in No. 41 etc. These methods have the advantage that they can be used for both overlay type and subprint type as color blueprints, but the process is complicated because adhesive is used each time, and the process is complicated when transferring each color. The disadvantage is that the precision of positioning is difficult.

As a method to eliminate the complexity of these processes, a method was proposed in Japanese Patent Application Laid-open No. 4 (1973) in which, after forming an image, the image is attached to an image-receiving sheet using ffi, and the image is transferred onto the image-receiving sheet by applying heat and pressure.
No. 7-41830, No. 48-93337, No. 51-5
It is described in No. 101. Especially JP-A-51-5101
No. 1 describes a method of providing a heat-meltable polymer layer as an adhesive on a permanent support, and JP-A-47-4
No. 1830 also describes a method for transferring images directly to a permanent support such as art paper or coated paper.

However, these methods have the following drawbacks: one is that the final image is left and right with respect to the original, and the other is that when hot-melting polymers are used, ,
In general, since the melting point is high and the transfer temperature becomes high, the dimensional stability of the support is affected by heat, and the positioning of each color σ) pattern b)
(i: rf) - 151 in JP-A No. 59-97140, which has drawbacks.
In 1-, before transferring each color image onto a permanent support, a photopolymerizable image-receiving layer is provided, and an image-receiving layer is provided. A method is disclosed in which images of each color are transferred onto a sheet, then retransferred onto a permanent support, and the photopolymerizable image receiving M is made uniform by further overall exposure.

13. with this method. A normal image is formed on the mask original, and the photopolymerizable image-receiving layer itself is soft because it contains an ethylenic multifunctional polymer, and it can be transferred at a low temperature during transfer. Since the photopolymerizable image-receiving layer is hardened by subsequent exposure, it has good adhesion and is resistant to scratches, and most of the drawbacks of Moeki are eliminated.

However, when using a conventional cover sheet,
When removing the cover sheet from the image receiving sheet, static electricity builds up and causes the cover sheet to peel off.1. The image receiving sheet 11 support,
[Problems to be Solved by the Invention 1] Purpose of the Invention 31. Preventing the generation of static electricity on the cover sheet 1. 6. To improve the handling of the machine.

[Means for Solving the Problems 1] An object of the present invention is to provide an image-receiving sheet element comprising an image-receiving layer and a removable cover sheet provided on a flexible support. The invention has been achieved by an image-receiving sheet element characterized in that an antistatic agent is internally added to the image receiving sheet element and/or a layer containing an antistatic agent is provided.

Below, the image receiving sheet element of the present invention will be explained in detail.

As the image-receiving layer of the image-receiving sheet element of the present invention, a known layer having the property of receiving an image can be used. In particular, in order to increase the strength of both images after the image is transferred, hardening 1. An image-receiving layer imparted with a photopolymerizable property (hereinafter referred to as a photopolymerizable image-receiving layer) is useful. Another effect of adding photopolymerizability is that the image transferred to the receiving layer becomes a reverse image and is finally retransferred to white paper such as that used in printing. However, when the image-receiving layer IJ is hardened by exposure to light, the adhesion with the support described in the shell becomes weak (so that when retransferred to white paper, the image-receiving layer is removed from the support. The term "photopolymerizable" here refers to the fact that upon irradiation with ultraviolet rays, the molecular weight of at least one portion of the photosensitive layer changes to the optical and thermal behavior of the exposed portion. It means a system that increases enough to produce 1.

A photopolymerizable image-receiving layer suitable for the present invention comprises (a) at least one polyfunctional vinyl or vinylidene compound capable of forming a photopolymer by 41 polymerization, cb > 111 polymeric binder, and ri ( e)
It contains a photopolymerization initiator activated by actinic rays, and a thermal polymerization inhibitor if necessary.

Suitable vinyl homo/mer or vinylidene compounds for use in the invention are, for example, unsaturated esters of polyols, especially esters of acrylic acid or methacrylic acid. Examples include ethylene glycol diacrylate, glycerin Triacrylate, polyacrylate, cochilene glycol dimethacrylate, 1,3-propanedio,-dimethacrylate 11 polyethylene glycol methacrylate, 1,2,4-butanetriol I, remethacrylate, trimethylolethane triacrylate, pentaerylene Trit dimethacrylate, pentaerythritol trimethacrylate, pentaerythritol tetramethacrylate, pentaerythritol diacrylate, pentaerythritol triacrylate, pentaerythritol triacrylate, dipentaerythritol polyacrylate, 1,3-brobanediol diacrylate ), 1,5-pentane 7-ol methacrylate, bisacrylates or bismethacrylates of polyethylene glycol with a molecular weight in the range from 200 to 400 and similar compounds; May be a,
These include, but are not limited to, unsaturated amides of acrylic or methacrylic acid with ω-noamines and ethylene bis-methacrylamide.

As the photopolymerization initiator, those with low absorption in the visible region are more preferable, such as benzo7ene, Michler's ketone [4,4'-bis(dimethylamino/)benzo7
E/one 1.4.4'-bis(diethylamide/)benzo 7
Aromatic ketones such as enanthraquinone, 4-methoxy-4'-dimethylamino/benzophenone, 2-ethylanthraquinone, 7-enanthraquinone, and other aromatic ketones; benzoin, benzoin methyl ether, benzoin ethyl ether, and benzoin Benzoin ethers of phenyl ether; methylbenzoin, ethylbenzoin and other benzoins; and 2-(
0-chlorophenyl)-4゜5-diphenylimigzole dimer, 2-(o-chlorophenyl)-4,5-(
+-methoxyphenyl) imiguzole dimer, 2- (
o -fluorophenyl)-4,5-diphenylimiguzole dimer, 2-(O-methoxyphenyl)-4,5
-diphenylimigsol dimer, 2(p-methoxyphenyl)-4,5-nophenylimigsol dimer, 2
, 4-no(p-nodoxyphenyl)-5-phenylimigsol dimer, 2-(2゜4-dimethoxyphenyl)-4,5-nophenylimigsol dimer, 2-(p-nodoxyphenyl)-5-phenylimigsol dimer,
-methylmerka7tophenyl)-4,5-diphenylimiguzole dimer, and U.S. Pat. No. 3,479,185
No. 3.784,557, British Patent No. 1,047,5
2,4.5- as described in each specification of No. 69
Mention may be made of, but not limited to, triaryl imiguzole dimers.

As the organic polymer binder, vinyl-based polymeric substances are particularly preferable due to their thermoplasticity to obtain good image transferability and 7α compatibility with the above-mentioned moamer compound and photopolymerization initiator. Examples include polyvinyl chloride, polyacrylic acid, polymethyl acrylate, polyethyl acrylate, polybutyl acrylate, polymethacrylic acid, polymethyl methacrylate, polyvinyl ether, polyvinyl acetal, and copolymers thereof. These include, but are not limited to.

Here, the appropriate mixing ratio of the monomer compound and the organic polymer binder (baingu) varies depending on the combination of the monomer compound and the organic polymer binder used, but - within the shell, the monomer: baingu Ratio is 1=10~2
:1 (weight ratio), and in this case, the amount of photopolymerization initiator added is preferably in the range of 0.01 to 20% by weight based on the weight of the monomer compound used.

Examples of thermal polymerization inhibitors include p-methoxyphenol, hydroquinone, alkyl- or aryl-substituted hydroquinone, tert-butylcatechol, pyrogallol, naphthylamine, β-su7tol, 7-enathiacin, pyridine, nitrobenzene, Mention may be made of, but not limited to, aryl phosphites.

The thickness of the photopolymerizable image-receiving layer should be at least enough to embed and transfer the four-color images from the image-forming material.The coating amount of the photopolymerizable image-receiving layer varies depending on the film thickness of the color image, but is 4g/Ill 2~40g
/so2 is suitable. Regarding such a photopolymerizable image-receiving layer, reference may be made to the description in JP-A-59-97140.

Also useful is a two-layered image-receiving layer disclosed in JP-A-61-189535. For details, the description in the same publication can be referred to.

A cover sheet is provided over the image-receiving layer. The cover sheet is made of a high polymer, which has a high degree of dimensional stability.
%, Z1. Thickness IJ of cover sheet: 6 μm or more, preferably 1. Ri is 200
/jm or less.

A particularly preferred cover seal l- is 6 = 200 μ
The polyethylene is glossy, preferably 20 to 50 μm thick.

In the present invention, the above-mentioned cover sheet is internally added with an @electric protection 1L agent and/or provided with a layer containing an antistatic agent.

Antistatic agent and 1. (A variety of commercially available materials are available,
For example, the materials described in "Static Electricity Handbook" (Published by The Society of Polymer Science and Technology, Jihekyokan, 1976 edition, pp. 365-376) may be mentioned.

As the material for the support, a substance that is chemically and thermally stable and has flexibility is used.

If necessary, it may be transparent to chemical light #i. Both.

Physically, polyolefins such as polyethylene and polypropylene, polyvinyl chlorides such as polyvinyl chloride and polyvinylidene chloride, cellulose derivatives such as cellulose acetate, nitrocellulose, and cellophane, polyamides, polystyrene, and polycarboky 11 polyimide The sheets of these laminates resemble ferophils. Among these, particularly preferred is a biaxially oriented polyethylene l/ntele 7 tallate film which has excellent f'y in dimensional stability and Cf transparency.

In order to prevent the generation of static electricity during use, it is preferable to impart conductivity by coating the support with a conductive layer or kneading a conductive substance into it. [1. ,: In the case of , increase the adhesive strength with the conductive layer.
Surface treatment such as ultraviolet M irradiation, -9, Unguto 1
- both are possible.

It is also possible to knead fine particles or the like into the support for the purpose of matting the surface. The thickness of the support is 50-3
Approximately 75-1, preferably 75-1
It is about 50/j.

The process of transferring the image formed on the image-forming sheet element according to the present invention, and the process of re-transferring the image transferred onto the image-receiving sheet onto a permanent support such as art paper or coated paper. 1i, known methods are used, e.g.
The image-receiving sheet element of the present invention to which the method described in Japanese Patent Application No. 1 No. 59-97140-d can be applied is easy to peel off since no W electricity is generated when the cover sheet is peeled off from the image-receiving sheet; There is no chance of static electricity clinging to the support of the image-receiving sheet, people's hands, etc., and ease of handling is improved.

The present invention will be described in detail below with reference to Examples, but the present invention is not limited thereto.

[Example 1 Example 1 Polyethylene terephthalate film (thickness: 100
A coating solution having the following composition was coated and dried on the surface of the image-receiving layer having a dry film thickness of 28 μm, and on top of this, a 30 μm thick coating containing 1% dialkyl phosphate triethanolamine was formed. Receiving sheet elements were prepared by laminating polyethylene cover sheets of .

Methyl methacrylate polymer 90g (average molecular weight 1oooooo, manufactured by Wayo Pure Chemical Industries, Ltd.) Pentaerythritolte I-? 908 acrylate Michler's ketone 0.51H benzophenone 3.18g paramethoxy7e7
-ru 0.09g methyl ethyl ketone
220゜Meanwhile, a release layer and a photosensitive layer ("
(6-polyethylene film made from an image-forming material with a fat layer as shown below) (/!7:
A coating solution having the following composition was applied and dried on the sample (3:100 µm) to provide a release layer having a dry film thickness of 0.5 µm.

Alcohol-soluble polyamide 762g (CM-
8000,20″C- η in 10wt% methanol solution: 23CIl19 To 1- Co., Ltd.) polyhydroxystyrene 1.8 g (Lenone M, average molecular weight = 5°500 Marukubi Sekiyu Co., Ltd.) Meta /-le 00g Methyl cellosolve 10011 Then, on this release layer, the four types (Y, M
, C, and B) were applied and dried to produce glossy coatings with a dry film thickness of 2.4 μm colored yellow (Y), magenta (M), cyan (C), and black (B), respectively. A photosensitive resin layer was provided.

Furthermore, a coating solution with the following composition was applied and dried on each photosensitive resin layer to form a protective layer with a dry film thickness of 1.5 μm, and four types of images of Y, M, C, and B were formed. A forming material (for negative/positive use) was manufactured.

Polyvinyl alcohol 60° (GL-
05, manufactured by Nippon Gosei Kagaku Kogyo Co., Ltd.) Water
970g methanol 30g
Negative masks corresponding to the four types of image forming materials were positioned and overlapped using register bins, and exposure was performed from a distance of 50 cm using a 2 km ultra-high pressure mercury lamp. Thereafter, each exposed transfer sheet was developed at 35° C. for 15 seconds using a developer having the following composition to form a positive image on the release layer of each transfer sheet, and four types (four colors) were formed. Color proofing sheets were obtained.

Na 2COa 15g Butyl cellosolve 1g Water
1N Next, the cover sheet is peeled off from the image-receiving sheet element, and the image-forming material with the black image is precisely superimposed on the image-receiving sheet using a register bin so that it is in contact with the image-receiving layer of the image-receiving sheet. Laminator 8
Pressure 2 using B-550-80, manufactured by Taisei Shoji Co., Ltd.
Crowbar, roller temperature 120℃, conveyance speed 900cm-7
A black image was obtained on the image-receiving sheet by peeling off the support of the image-forming material laminated under the same conditions as above.The same process was then repeated for the remaining three color image-forming materials. An image receiving sheet with black, cyan, magenta and yellow images transferred thereto was obtained.

Using the image-receiving sheet having the four-color transfer image described above, a color test sheet for the sub-print method was prepared as follows.

An image-receiving sheet having four-color transferred images was stacked on white art paper so that the image-receiving layer side was in contact with the sheet, and this was sandwiched between an aluminum plate and a polyethylene terephthalate film, and lamination was performed under the same conditions as described above.

Next, when the support of this image-receiving sheet and the white art paper were peeled off, peeling occurred at the interface between the support of the image-receiving sheet and the image-receiving layer, and an image very similar to the printed matter was obtained.

In the above operation, no difficulty in peeling due to static electricity was observed when peeling the cover sheet from the image-receiving layer.

On the other hand, when the cover sheet did not contain an antistatic agent, the cover sheet adhered to the support of the image-receiving sheet element due to generation of static electricity, resulting in poor workability.

Example 2 The image-receiving layer had a two-layer structure with an adhesive surface and having a dry film thickness of 20 μ- and 1.5 μ-, respectively, by sequentially applying coating solutions A and B having the following compositions. An image receiving sheet was created.

Ethylene-vinyl acetate copolymer 15g (weight ratio:
81% ethylene.

Vinyl acetate 19%, Mitsui Polychemical Co., Ltd. 91 “Eva 7 Rex #410”) Chlorinated polyethylene 0.075 g (Yamaba Kokusaku Pulp Co., Ltd., “Super Chron 907 LTA”) Fluorine surfactant 0.25゜ (manufactured by 3M Co., Ltd., "70 Lard FC-430") Toluene 100cci1 Toei Polyvinyl Butyral 4g (manufactured by Denki Kagaku Kogyo Co., Ltd., '$2000-L'I) 7-Track System Surfactant 0.05B (3M Methanol 50ee Methyl Ethyl Ketone 20cc Methyl +/- Rosolvate) 20cc This -J- was added with a 40 μ-thick polyethylene cover sheet containing 1% of the anti-static agent of Example 1. were laminated to create an image receiving sheet element.

As in Example 1, 1. Then, a color proofing image was formed on white art paper.As in Example 1, the removability of the cover sheet was good.

However, when a polyethylene cover sheet containing an antistatic agent was used, the handling properties were poor.

Claims (1)

[Claims] An image-receiving sheet element comprising an image-receiving layer provided on a flexible support and a removable cover sheet, wherein the cover sheet is internally loaded with an antistatic agent and/or provided with a layer containing an antistatic agent. An image receiving sheet element characterized by: