JPS6199151A - Electrophotographic sensitive film - Google Patents

Abstract

PURPOSE:To facilitate formation of a color negative or an image by forming a photosensitive layer composed of a colorant and a photopolymer on one side of a plastic film having a heat resistant temp. of >=100 deg.C, and forming another transparent peelable layer on this layer or the reverse side. CONSTITUTION:The photosensitive layer composed essentially of a colorant and a photopolymer is formed on one side of the plastic film having a heat resistant temp. of >=100 deg.C, such as biaxially stretched polyester film, resistant to heat at the time of electrophotographic copying or projection of an overhead projector. Further, the transparent peelable layer is formed on this layer or the reverse side to form an electrophotographic sensitive film. As this photopolymer, a compsn. of a photosensitive ferric salt producing ferrous ions on exposure, such as ferric ammonium citrate or ferric ammonium oxalate, and a hydrophilic polymer, such as gelatin or glue, or the like compsns. are enumerated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a photosensitive film for forming a color image on a plastic film using electrophotography or the like.

[Conventional technology]

Generally, a film on which images such as drawings or characters are formed using an electrophotographic copying machine or the like is transferred to an overhead projector.
(abbreviated as OHP) is used to enlarge and project images and is widely used in education, conferences, etc. In the past, it was mainstream to express images in black on transparent film, but in recent years there has been a strong demand for expression in color.

Requests for colorization can be roughly divided into requests for simply coloring OHP films and classifying them by purpose in an easy-to-understand manner, requests for forming a color negative image (white blank image on a color background), and making it easier to see. Furthermore, there are various demands such as the desire to express drawings, characters, etc. in color positive images.

[Problem that the invention seeks to solve]

Methods for colorizing images include electrophotography using color toner, inkjet recording, and thermal transfer recording, but translucent substrates, such as those for OHP, generally have poor or no ink absorption. Since there are many materials that absorb ink, it has been pointed out that it is difficult to create transmission images using inkjet recording methods or thermal transfer recording methods. Also, in the electrophotographic method using Kalani toner, it is easy to create a positive image, but in order to form a negative image, a negative original is required, and due to the adhesion of the toner, it is difficult to create a clear negative image. It is difficult.

[Means for solving problems]

In response to these demands, the present inventors have developed a heat-resistant temperature of 100°C.
After coating and drying a photosensitive layer mainly consisting of a colorant and 7 otobolimer on one side of the above plastic film,
The process of forming a black image on the beer layer using a photosensitive film having a transparent and releasable beer layer on the opposite side using an electrophotographic copying machine or the like. A color negative image or a positive image that can be used as an OHP film can be easily obtained through the steps of exposing the photosensitive layer by applying actinic rays through the black image, and developing the photosensitive layer after peeling off the beer layer. I discovered that.

(Function and effects of the present invention) According to the present invention, by selecting the photopolymer to be used, for example, in the case of a negative type photopolymer, an image reversed from a positive original can be obtained; In this case, a positive color image can be obtained from a positive original. Furthermore, if used with a black image formed on the beer layer using an electrophotographic copying machine or the like, the OHP film will have a black image on a color background. As described above, the photosensitive film of the present invention has a 0. This satisfies various requirements for colorizing HP films.

The present invention will be explained in more detail below.

The plastic film having a heat resistance temperature of 100° C. or higher used in the present invention is not particularly limited as long as it can withstand heat during electrophotographic copying or OHP projection.

Generally, for this purpose, a two-wheel stretched polyester film (polyethylene terephthalate film) or the like is preferably used. 1 Next, the photopolymer contained in the photosensitive layer applied to the present invention undergoes changes such as polymerization, crosslinking, dimerization, decomposition of broken links, and rearrangement due to light irradiation, and its solubility in the solvent increases or decreases. It is a photosensitive material with the property of oxidation, and is conventionally called an organic photosensitive agent for plate making, an i-free photosensitive agent, a photosensitive resin, a photoresist, etc. Examples include the following:

1. From photosensitive ferric salts that provide ferrous ions upon exposure, such as ferric ammonium citrate, ferric ammonium oxalate, and ferric oxalate soda, and hydrophilic polymers such as gelatin and glue. composition.

2. Hydrophilic polymers such as gelatin, fish glue, gum arabic, polyvinyl alcohol, polyacrylamide, carboxymethyl cellulose, human oxyethyl cellulose, a copolymer of polyvinyl methyl ether and maleic anhydride, and p-aminodiphenylamine.

A composition comprising a tetrazonium salt of a diamino compound such as benzidine, cyanidine, toluidine, etc. or a diazo resin obtained by condensing p-diazophenylamine with paraformaldehyde.

3. A composition comprising a diazo resin obtained by condensing a diazo compound such as p-diazophenylamine with paraformaldehyde.

4.4.4'-Diazidostilbene-2.2'Sodium disulfonate, 1.5-Diazidonaphthalene-3
・Sodium 7-disulfonate, 3'-azido-4-4
- Sodium azidobenzalacetophenone-2-sulfonate, sodium 4,4'-diazidostilbene-α-carboxylate, sodium di(4-amido-2'-hydroxybenzal)acetone-2-sulfonate, Sodium 4-azidobenzalacetophenone-2-sulfonate.

Azide compounds such as sodium 4.4'-diazidiphenyl-3.3'-disulfonate, polyacrylamide, and polyvinylpyrrolidone.

A composition comprising polymers such as polyacrylic acid, gelatin, casein, albumin, gum arabic, CMC, hydroquine ethyl cellulose, and soluble nylon.

5.4. Azide compounds such as 4'-diazidostilbene, 4,4'-diazidochalcone, and 4,4'-diazidodibenzalacetone, and cyclized rubbers, synthetic rubbers, and polymers soluble in organic solvents. A composition consisting of

6. A composition of a quinone diazide compound such as naphthoquinone-1,2-diazide sulfonic acid ester or sulfonic acid and an alkali-soluble resin.

7. A composition consisting of a polymer in which a cinnamic acid group is introduced into the molecule, such as cinnamic acid ertel of polyvinyl alcohol, and a sensitizer such as 5-nitroacenaphthene, 1,2-penzanthraquinone, Micheler's ketone, etc. .

8. A composition comprising an ester obtained from acrylic acid or α-alkyl acrylic acid and polyglycols, a polymerization initiator such as 9/10-anthraquinone, and a filler.

9. Acrylamide, calcium acrylate.

Ethylenically unsaturated compounds such as N-N'-methylenebisacrylamide, photosensitive ferric salts such as ferric ammonium citrate, ferric sodium oxalate, and ferric ammonium oxalate, gelatin, and polyvinyl alcohol. A composition consisting of a wood-loving polymer such as.

10. Ethylenically unsaturated monomers such as acrylamide, methacrylamide, and acrylic acid and ethylene blue;
Rose Bengal, phloxine, erythrosin, eosin, fluorescein, acriflavin, thionin, riboflavin, chlorophyll, brilliant green.

Photoreducible dyes such as methylene green, ascorbic acid, and droxyamine, and thiourea.

Organic or inorganic substances with reducing action such as glutathione, ethylenediamine-sodium tetraacetate, ferrous sulfate, gelatin, polyvinyl alcohol, polyacrylamide,
A composition comprising a hydrophilic polymer such as CM-C and optionally a crosslinking agent such as calcium acrylate or N,N'-methylenebisacrylamide.

Turtle 11, bis-(3-aldehyde-4-nitrophenyl)
-Positive photosensitizers having an O-nitropenzamphito group such as -phthalate, 3-aldehyde-4-nitrophenyl carbonate.

Although typical examples have been described above, the present invention is not limited to these, and various known methods can be used for image formation.

Various pigments and dyes can be used as the coloring agent contained in the photosensitive layer. Especially when used for OH2, various color tones are required. Therefore, the material or dye may be selected depending on the desired color tone and the photopolymer used. As the pigment, inorganic pigments, organic pigments, etc. are used in the form of water dispersion, acid dispersion, or solvent dispersion. As the dye, various oil-soluble dyes, water-soluble dyes, spirit dyes, and dispersed dyes are used depending on the purpose. In the case of OH2, there may be problems such as turbidity of the projected image, so it is better to select a coloring agent that is as transparent and clear as possible.

In the present invention, the transparent and releasable beer layer to be provided on the photosensitive layer or on the opposite side includes polystyrene,
Polyvinyl acetate, polyacrylate, copolymer of methyl methacrylate and acrylate, copolymer of methyl methacrylate and vinyl acetate, polyvinyl chloride, copolymer of vinyl chloride and vinyl acetate, polyvinylidene chloride, vinylidene chloride and acetic acid Vinyl copolymer.

Depending on the type of support and photosensitive layer, select from film-forming polymeric substances such as polyvinyl butylade, cellulose, acetate, phthalate, natural rubber, cyclized rubber, synthetic isoprene rubber, polyvinyl formal, polyester, and nylon. They are selected and used alone or in combination.

Furthermore, the toner should be suitable for electrophotographic copying machines, that is, it should not only have excellent adhesion with the toner, but also have high image density, no double feeding, good runnability, and no problems caused by static electricity. It is further effective to appropriately add resins with good adhesive properties, matting agents, antistatic agents, etc. to the legal beer layer.

Resins with good adhesion to toner include organic solvent-soluble polyester resins, acrylic ester resins, methacrylic ester resins, or styrene and acrylic ester resins.
There are copolymers of styrene and metal grilled esters, and if a resin having the same composition as the toner is added and mixed with the beer layer, the toner will be more firmly attached during heat fixing.

In addition, as matting agents, inorganic pigments such as talc, clay, carbonaceous, silica, titanium, and polyethylene, polypropylene, and polystyrene are used.

Polyamide, polyester, phenolic resin.

There are organic polymer powders such as urea resin, melamine resin, Epoquin resin, and phenoxy resin. The particle size and addition amount of the matting agent are selected in consideration of transparency and surface condition.

When applying the photosensitive layer and the beer layer, they are applied in a state in which they are dissolved or dispersed in water or a solvent, and the coating methods include bar coating, blade coating,
Any known coating method such as roll coating, spinner coating, curtain coating, or gravure coating may be used, and the solvent used is appropriately selected depending on the types of the photosensitive layer and the beer layer.

〔Example〕

The present invention will be explained below with reference to examples, but the present invention is not limited to the following examples.

Both commercial capitals refer to Chongzengbu.

Example (1) Gelatin 20g (parts) Ferric ammonium oxalate 6.3g (parts) Water
400g (parts) of fish glue in a solution of 5g (parts) of phthalocyanine blue 59 (parts) of water
A photosensitive solution was prepared by adding a dispersion prepared by processing 45 g (parts) in a ball mill, and this was
A photosensitive layer with a thickness of 2 microns was prepared by coating and drying on a 0 micron transparent polyester film.Vinyl chloride-vinyl acetate copolymer 15 parts (Vinyrite VYHH, manufactured by UCC) Methyl ethyl ketone 45 parts Toluene
A beer layer consisting of 40 parts was coated and dried on the photosensitive layer so that the thickness after drying was 6 μm. The photosensitive film thus obtained was transferred to Xerox 3
500 (Fuji Xerox Co., Ltd.) to copy black letters onto the beer layer.

Thereafter, the photocopied text was exposed to light for about 3 minutes from a 30 ampere arc lamp at a distance of 60 cm. After exposure, the beer layer was peeled off and immersed in a 1% Hz Oz aqueous solution at 18°C for 1 minute to make the exposed portion of the photosensitive layer sufficiently insoluble in water, and then immersed in water at 37°C to remove the photosensitive layer. The uncured portion of the film was dissolved and removed to create a cyan negative. When this negative image is projected with 014P, it becomes a vivid cyan background.
White blank letters were projected.

Example 2 Polyvinyl alcohol (degree of polymerization 1700-2400°, degree of saponification 98.5±0.5) 100 parts of 10% aqueous solution p-
Diazodiphenylamine-formaldehyde condensate
0.8 part permanent carmine FB
20% water dispersion 4 parts water
A magenta-colored photosensitive solution consisting of 100 parts isopropyl alcohol and 10 parts was coated on a 100μ transparent polyester film and dried to form a 2 micron thick photosensitive layer, followed by 15 parts formal resin (Denka Polmar #30 Denki Kagakusha (manufactured by) methanol
25 parts toluene
A beer layer consisting of 75 parts was coated and dried on the photosensitive layer so that the thickness after drying was 6 μm. The photosensitive film thus obtained was used as Ricobee DT5700Rb.
(Ricoh) to copy the black letters on the beer horse. Thereafter, the photosensitive layer was exposed to light by passing it through a Ricoh So-1oo (Ricoh) so as to be exposed to light from the side of the copied characters, and then the beer layer was peeled off and the photosensitive layer was developed with water. After drying, magenta negative characters were obtained. When projected using an OHP, the blank white letters appeared clearly on a magenta background.

Example 3 Alkali-soluble cresol novolac resin 10 parts 1,2-naphthoquinonediazide-(2) - Condensate of 5-sulfonyl chloride and alkali-soluble phenol novolak resin 5 parts Dye Varifaxtoble 16
05 (manufactured by Orient Chemical Co., Ltd.) 2 parts methyl ethyl ketone 60 parts ethyl cellosolve acetate 30 parts butyl acetate
A positive photosensitive liquid consisting of 10 parts was coated on a 100μ transparent polyester film and dried to form a photosensitive layer with a thickness of 2μ. Vinyl chloride/vinyl acetate copolymer 15 parts (Vinyrite VYHH, manufactured by UCC) Methyl ethyl ketone 45 parts toluene
A beer layer consisting of 40 parts was applied to the opposite side of the photosensitive layer to a dry thickness of 10 microns. Using the thus obtained photosensitive film, black characters were copied onto the beer layer using Xerox 3500 (Fuji Xerox). From the black character side, use Meishi printer p-607 (Dainippon Screen Manufacturing) to print 5
After exposure for 0 seconds, the beer layer was peeled off and 0.5% Na
The photosensitive layer was developed with an OH aqueous solution. After drying, a clear blue character image was obtained by subjecting it to legal exposure for 20 seconds using a similar printer.

(In this case, the beer layer may be peeled off after development or after secondary exposure.) Procedural Amendment Import) February 6, 1985

Claims (1)

[Claims] A photosensitive layer consisting mainly of a colorant and a photopolymer is provided on one side of a plastic film with a heat resistance temperature of 100°C or higher, and a transparent and removable beer layer is provided on the photosensitive layer or the opposite side. A photosensitive film for electrophotography characterized by the following.