JPS6214655A - Light transmitting recording material and image formation by using it - Google Patents

Abstract

PURPOSE:To prevent scratching due to traveling or the like and attachment of dust and deterioration of image quality by incorporating fine particles or a hardening agent in the outermost layer on the side of a photosensitive layer, and at least fine particles in the backside layer. CONSTITUTION:The photosensitive layer of the light transmitting photosensitive recording material composed of the photosensitive layer, a support, the backside layer, and so on, contains the fine particles or the hardening agent, and the backside layer contains the fine particles. The fine particles have, preferably, an average particle diameter of <=5mum, and they are added to the photosensitive layer, preferably, in an amount of 1-30wt% of the solid component of the photosensitive layer, and the backside layer is prepared by dispersing the fine particles into a binder resin, and coating the support with it, and drying it, and they are added, preferably, in an amount of 5-30wt% of the solid matter of the backside layer, and as these fine particles, silica, alumina, and the like can be enumerated.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a long roll-shaped light-transmitting photosensitive recording material and an image forming method using the same.

The present invention relates to a photosensitive recording material and an image forming method that make it possible to always form high-quality images in a system that forms images at arbitrary positions at any time within the same recording material.

“Conventional technology” In recent years, the amount of documents generated in offices, etc. is extremely large.
There is a strong desire to develop a system that can record and reproduce this information at any time.

Conventionally, translucent photosensitive materials used in long lengths (here, long length refers to recording materials with a length-to-width ratio of /:20 or more) and roll-like forms include... Motion picture films using silver oxide, microfilms, reproduction films using diazo compounds, etc. are known. Using these recording materials, an image is formed at an arbitrary position on the same recording material by image exposure and development, and then an image is formed at another position on the recording material by repeating the same operation. In order to do this, extremely complicated processes and equipment are required, and it is extremely difficult in practice to use these recording materials to form images at arbitrary positions at any time, and to repeatedly search, project, and read out images as needed. there were.

In principle, as a system that allows images to be formed at arbitrary positions on a recording material at any time, it is possible to use an electrophotographic recording material, a heat-developable photosensitive material, or a post-activated dry image forming material. It will be done. However, a system that can form images at arbitrary positions on the same photosensitive material at any time and perform searching, projection, and readout as needed has not yet been realized. In this way, the same #LVC
Various problems occur in systems that form images at any time and repeatedly perform operations such as searching, projecting, reading, and copying images at arbitrary positions as needed.

For example, in a system using a long recording material, it is necessary to run the recording material, and when running a long roll of recording material, contact between the front and back sides of the recording material, Due to contact between the material and the rollers or guide pins necessary for running, scratches etc. may occur on the surface of the photosensitive layer.
Transfer of substances from various places, such as transfer from the back side in contact with the photosensitive layer surface, transfer of the photosensitive layer surface transferred to the back side to the photosensitive layer surface, transfer of material transferred to the guide roller and retransfer to the photosensitive layer, photosensitive layer Physical defects such as surface blocking or subtle changes in surface condition occur, and when a new image is formed after running, the quality of the image is significantly lower than the image formed before running. I found out.

Also, long recording materials can be stored in roll form for long periods of time.
(Then, direct contact between the front and back surfaces of the recording material (due to occurrence of blocking, etc.) caused drawbacks such as a reduction in image quality.

In particular, in the case of recording materials that record images in reduced size, reading by enlarging and projecting is required, which magnifies the various defects described above, which poses a serious problem.

In the case of electrophotographic recording materials, the condition of the surface of the photosensitive layer is extremely important in the image forming process, as is well known. That is, in the electrophotographic process, first, the surface of the photosensitive layer is uniformly charged, then imagewise exposed, and toner development is performed. Therefore, the physical properties or state VC of the surface of the photosensitive layer
If a slight change occurs in %, it will greatly affect the quality of the image formed.It has not been known until now to add a curable compound or fine particles to the photosensitive layer or surface protective layer of electrophotographic materials. ing. It has been known to provide surface protective layers containing curable compounds or particulates. Examples of adding a curable compound include JP-A-30-30!21 and JP-A-3-3! 3
F, JP-A Shoj&-/A32, JP-A Sho-yo 6-≠θg32
As an example of adding fine particles, see Tokkosho! 0-31
123, Japanese Patent Application Publication No. Shojλ-26.225 Japanese Patent Application Publication No. Shoj4-310
j≠, Japanese Patent Application Publication No. 2003-120003, J71, etc. are known. However, these are all related to non-light-transmitting photosensitive materials, and are subject to wear and tear due to contact with paper, which is the transfer target.
The purpose was to prevent scratches from contact with toner particles or during the cleaning process, and to improve performance in repeated use of the same photoreceptor.

In the case of commonly used PPC copying, a toner image formed on a photosensitive recording material is transferred again to paper or the like to form an image. Therefore, the final image is free from minute scratches, dust, and defects due to microscopic physical properties or conditions on the surface of the photosensitive layer.

In many cases, it is not enlarged and transferred and does not cause any major drawback in practice.

Also, PPC or CP that does not provide toner image transfer.
Even in the case of C copying, there is usually no need to enlarge and project the photoreceptor itself during reading (the various minute defects mentioned above are often not a major drawback in practice.

However, when using a light-transmitting photosensitive recording material and using the image formed on the recording material as it is without a transfer process, the above-mentioned minute defects become a big problem. In particular, in systems that use light-transmitting photosensitive recording materials to reduce and record images, the images are projected and enlarged again to be read out, so if there are various minute defects on the surface of the photosensitive layer, it may be difficult for practical use. It becomes a big problem.

When an image is formed on a translucent photosensitive recording material using the electrophotographic process as described above, the condition of the surface of the photosensitive layer is important. In other words, if an image is formed at a desired position on a recording material and the image is run several dozen to several thousand times or more, or if the image is formed again after being stored in a roll for a long period of time,
In addition to defects such as scratches on the surface of the photosensitive layer, minute spot-like or image-like density unevenness and lack of toner in the image area were observed. Furthermore, linear or dotted scratches were generated on the back side of the electrophotographic recording material after running, damaging the background. If an image is formed on a recording material with these defects, this results in a reduction in character legibility, resolution, or continuous tone image quality, especially when using translucent electrophotographic recording materials. In the micro system, the quality of the image deteriorated significantly, and it could not be put to practical use. This is partly due to scratches, dirt, blocking, etc. that occur during travel or storage in roll form.
In addition to these surface defects, defects that are thought to be caused by subtle physical properties or state changes on the surface of the photosensitive layer that cannot be observed even by microscopic observation occur, and it is extremely important in practice to prevent these defects. It is. The present inventors have proposed an image forming method in which an elongated, roll-shaped light-transmitting photosensitive recording material is used, and an image is formed on the photosensitive recording material two or more times through steps including at least exposure and development. It was proposed that the various defects mentioned above can be significantly improved by providing a surface protective layer containing fine particles or a curable compound on the surface of the photosensitive layer (Patent Application Shoto-Ta R7).
λ1, patent application Shoto-Tata Oli No.1). Indeed, these surface protective layers were found to have a remarkable effect on images formed after running the photosensitive material. however,
The image created before the trip showed some toner missing, and a decrease in quality was observed when compared with the image before the trip. Furthermore, by providing the above-mentioned protective layer, the scratches on the surface of the photosensitive layer side were significantly reduced, but many scratches occurred on the surface of the support opposite to the photosensitive layer, making it difficult to enlarge the image with transmitted light. When reading, scratches were visible on the screen, and image quality was degraded. Furthermore, it has been observed that when an image is formed on a photosensitive material provided with the above-mentioned surface protective layer after being stored in roll form for a long period of time, very slight blocking-like density unevenness occurs in the continuous tone image. The above-mentioned problems had to be overcome in a system for running light-transmitting photosensitive recording materials.

"Problems to be Solved by the Present Invention" The purpose of the present invention is to solve the following problems when forming an image by a process including at least exposure and development two or more times using a long roll-shaped light-transmitting photosensitive recording material. The objective is to prevent scratches and dust from adhering to the image forming apparatus due to running, etc. before the λth and subsequent image formations, and to prevent the image quality from deteriorating from the second and subsequent image formations.

Another object of the present invention is to prevent deterioration in the quality of images formed before driving.

A further object of the present invention is to prevent scratches, dirt, etc. from occurring on the support opposite to the photosensitive layer due to running or the like.

"Means for Solving the Problems" The inventors of the present invention aimed to form an image at least twice at any time and at any position within the same recording material, including exposure and appearance (images). As a result of intensive research in order to solve the above-mentioned image defects that occur after running a long roll of light-transmitting photosensitive recording material many times or storing it in a roll for a long period of time, we have found that the outermost layer on the photosensitive layer side In other words, the light-transmitting photosensitive recording material contains at least fine particles or a curable compound in the photosensitive layer, and the back layer contains at least fine particles, or the surface protective layer contains at least fine particles or a curable compound. We have discovered that the various defects described above can be significantly improved by a light-transmitting photosensitive recording material containing at least fine particles or a curable compound, and containing at least fine particles in the back layer, and have thus arrived at the present invention. Specifically, the present invention includes the following (1) to (4).

(1) A translucent photosensitive recording material comprising at least a photosensitive layer, a support, and a back layer, characterized in that the photosensitive layer contains at least fine particles or a curing agent, and the back layer contains at least fine particles. Translucent photosensitive recording material.

(2) In a light-transmitting light-sensitive photosensitive recording material comprising at least a surface protective layer, a photosensitive layer, a support, and a back layer, the surface protective layer contains at least fine particles or a curing agent, and the back layer contains at least fine particles. A translucent photosensitive recording material characterized by containing.

(3) A long roll-shaped translucent photosensitive recording material comprising at least a photosensitive layer, a support, and a back layer, wherein the photosensitive layer contains at least fine particles or a hardening agent, and the back layer contains at least fine particles. An image forming method comprising repeatedly forming an image two or more times at an arbitrary position on the same recording material using a light-transmitting photosensitive recording material containing the same.

(4) In a long roll-shaped light-transmitting photosensitive recording material comprising at least a surface protective layer, a photosensitive layer, a support, and a back layer, the surface protective layer contains at least fine particles or a curing agent, and the back layer An image characterized by repeatedly forming an image at an arbitrary position on the same recording material two or more times by using a light-transmitting photosensitive recording material containing at least fine particles therein by a process including at least exposure and development. Formation method.

The present invention relates to a long and roll-shaped light-transmitting photosensitive recording material, in which an image is formed at any position within the same recording material two or more times by a process including at least exposure and development, that is, an electrophotographic recording material; It can be advantageously used in heat-developable photosensitive recording materials or post-activated dry image forming materials, and particularly in electrophotographic recording materials.

The present invention was developed by Tokukai Sho! I-/'A9j7.2, Tokukai Sho! Turco J3tj, Tokukai Akira! Tar210≠Kota,
, as described in Japanese Patent Application Laid-Open No. 2003-120001-16 Hiro θ, etc. (,
Recording material during image formation in a system in which image formation is repeated at any given position two or more times within the same photosensitive recording material using an electrophotographic recording method, a heat development type photosensitive recording method, or a post-activation type dry image forming method. It can be further advantageously used in methods for storing images or observing images that have already been formed. In particular, it can be advantageously used in electrophotography.

In the present invention, "at any time" means that there is no time constraint on the operation when performing image forming operations by exposure and development two or more times, and "any position" means that when image forming operations are performed twice or more, "at any position" Any position in the length direction of the translucent photosensitive recording material it, = r
This means that images can be formed in an irregular order.

In a preferred embodiment, a magnetic or optical mark indicating the position is provided along the length of the recording material, which can be used to designate the position where an image is to be formed and to search for the formed image.

Next, the present invention will be described in detail.

In the present invention, the layer provided on the surface of the photosensitive layer side is abbreviated as a "surface protective layer", and the layer provided as the outermost layer on the back side of the support is abbreviated as a "back layer". The improved light-transmitting photosensitive recording material of the present invention comprises at least a photosensitive layer, a support, a back layer and, if necessary, a surface protective layer.

The support used in the present invention is not particularly limited as long as it is transparent and flexible, but in the case of an electrophotographic recording material, it requires further conductive treatment. Specific conductive treatments include aluminum, gold, baladium,
A method of vapor depositing metals such as chromium, or In 203,
By a method of vapor depositing a metal oxide such as S n O2, a method of dispersing metal powder and a metal oxide, etc. in a binder polymer and applying it, or a method of dissolving and applying an organic quaternary salt compound etc. together with a binder polymer. , a conductive transparent plastic film can be used.

Various types of substantially translucent photoreceptors can be used in the present invention. For example, when using an electrophotographic recording material, the following organic photoconductors can be preferably used. Specifically, polyvinylcarbazole, polyvinylpyrene, polyvinyl-anthracene, poly-2-vinyl-a-(1-dimethylaminophenyl)-5-phenyloxazole, z+)-J-vinyl-N-ethylcarbazole, polyacena Ptyrene, polyindene, pyrene
Formaldehyde resin, ethylcarbazole-formaldehyde resin, JP-A-16-/A/r! Triphenylmethane polymer, etc. described in No. O and various polymer compounds that are derivatives thereof, triazole derivatives, oxadiazole derivatives, imidazole derivatives, polyarylalkane derivatives, pyrazoline derivatives, pyrazolone derivatives, phenylenediamine derivatives, arylamine derivatives , amine-substituted chalcone derivatives, N,N-vicarbasil derivatives,
Examples include various low-molecular compounds such as oxazole derivatives, styryl anthracene derivatives, fluorenone derivatives, benzidine derivatives, hydrazone derivatives, and phthalocyanine derivatives, but are not particularly limited thereto. Also, a combination of a vapor deposited thin film such as selenium and an organic photoconductor can be used.

When the organic photoconductor is a low-molecular compound, a high-molecular compound having suitable film properties can be used as a binder. Specifically, polyamide, polyurethane, polyester, epoxy resin, polyketone, styrenic polymer and copolymer, poly-vinylcarbazole, polycarbonate, polyester carzenate, polysulfone, vinyl chloride resin, vinylidene chloride resin, vinyl acetate. Examples include various polymer compounds such as resins and acrylic resins. When the organic photoconductor is a polymer compound,
Although it has a coating property by itself, the above-mentioned polymer compound may be added as needed.

A sensitizing dye, a chemical sensitizer, etc. can be used in the organic photoconductor, if necessary.

As for the sensitizing dye,
(Society of Photography
cScientists and Engineers
rs), mul.

≦0-44t(/ri7ri, ``Applied Optics J,!O(/y
ty, United States Patent (USP) J, 037, rti, U
SPJ, 2!0, ≦/j% USPj
, 7/λ.

lr//, British Patent 1,333,24u, 'Research
Disclosure J (Re5earchDiscl
osure) #/ 0231 (10ri, 1273 J issue, page t2 onwards)% u3pJ, /Hiro/, 700%US
PJ, y3r, 291k, Tokkai ShojA-/Hiroshi! tO
, JP-A-74-/lI-yo-4/, JP-A-Sho! B-l-ri! !
≦, Tokukai Shojt-Kota! ♂7, Tokukai Shoj A-triej
, Tokukai Akira Jr! -//u2Ji9, JP-A-31
Various sensitizing dyes disclosed in /u/ etc. can be mentioned. These known sensitizing dyes and other dyes that can increase the sensitivity of the organic photoconductor can be appropriately selected and used, but the dyes are not limited thereto.

A chemical sensitizer can be used in the recording material of the present invention, and examples of the chemical sensitizer include electron-withdrawing compounds such as trinitrofluorenone, chloranil, and tetracyanoethylene; Hiro 32, Tokukai Shoj! -10
Examples include compounds described in 223 et al. However, it is not particularly limited to these.

To prepare the photosensitive layer of the translucent electrophotographic recording material used in the present invention, if necessary, the above-mentioned components are dispersed or dissolved in a desired ratio to prepare a dispersion or a uniform solution.
It is then formed by coating and drying on a support having a suitable conductive surface.

The thickness of the photosensitive layer is 7 to 10 μm, preferably 3 to 10 μm.
It is in the μm range.

In the present invention, the fine particles contained in the surface protection 1-1 photosensitive layer or the back layer include various inorganic and organic fine particles. For example, inorganic insulating fine particles such as silica, calcium carbonate, mica, clay, boron nitride, and molybdenum disulfide, fine particles of metal oxides such as titanium oxide, aluminum oxide, and zinc oxide, and long-chain organic acid metal soaps. Examples include fine particles and fine particles of various polymers. These fine particles can be used not only alone but also in combination of two or more types.

The average particle size of the fine particles is not particularly limited, but 1
It is 0 μm or less, preferably 55 m or less. If the average particle diameter is too large, it is not preferable because it impairs the quality of the recording material, such as the required light transmittance and the resolution of the image formed. The amount of fine particles to be added can be determined within a range that does not impair the quality of the recording material, such as the required light transmittance and the resolution of the image formed.

When these fine particles are used in the photosensitive layer, they are used in the range of 0.5 to 10% by weight of the solid component of the photosensitive layer, especially l to ioz@%.
A range of is suitable.

When a fine particle-containing surface protective layer is provided on the recording material of the present invention, it is provided by dispersing one or more of the above-mentioned fine particles in a binding resin and coating it on the photosensitive layer. Binder resins used include polyester carbonate, polysulfone, polyether, polyester, polycarbonate, polyamide, polyimide, polyurethane,
Acrylic acid ester polymers and copolymers, methacrylic acid ester polymers and copolymers, styrene resins, polyvinyl acetals, polyvinyl carbazole, vinyl chloride resins, vinylidene chloride resins, chlorinated polyolefins, vinyl acetate resins, alkyds resin, xylene resin,
Examples include, but are not limited to, ketone resins and celluloses. These resins can be used alone or in combination of two or more.

The fine particles are generally in the range l-♂j% by weight of the solid component of the surface protective layer, especially! A range of 10% by weight can be preferably used.

In the present invention, the thickness of the surface protective layer is o, oi to j μm.
, preferably 0.1 to 3 μm, particularly preferably 0.1 to 3 μm. /-
/μm is good. If it is thinner than the above range, the protective effect will be reduced, and if it is thicker, it will cause factors such as a decrease in sensitivity, an increase in residual potential, and a decrease in resolution, which is not desirable (゛・
1. The back surface II containing fine particles of the present invention is prepared by dispersing one or more of the above fine particles in a binding resin.

It is provided by coating and drying on a support.

The binder resin to be used is not particularly limited as long as it is a general-purpose film-forming resin, but the resins exemplified for the surface protective layer described above can be used. The amount of fine particles added is not limited as long as it does not impair the required light transmittance of the recording material, but it is
! A range of Q weight f%, particularly a range of 1 to 30% by weight, is preferably used.

Among the fine particles mentioned above, silica, aluminum oxide, titanium oxide, metal soap, and fine particle polymers are particularly preferably used as the fine particles added to each of these layers. For example, examples of silica include Aerosil/30, Aerosil 200, Aerosil 300, Aerosil 310°Aerosil Q') (!0.Aerosil') manufactured by Nippon Aerosil Co., Ltd.
1"1'-, go, Aerosil R 72, Fuji Devin Thyroid 2bu≦, Thyroid 2 Hiroμ, Thyroid 211° Thyroid 30t, Toxil GV made by Tokuyama Soda Co., Ltd., Carplex made by Geotsugi Pharmaceutical Co., Ltd. , De
Examples of aluminum oxide include EC-Ko1 manufactured by Soto Chemical Company, etc.; examples of aluminum oxide include aluminum oxide C manufactured by Nippon Aerosil; examples of titanium oxide include titanium oxide Pcoj manufactured by Nippon Aerosil; Nippon Aerosil's MOXI, a silica mixture
Examples include, but are not limited to, O, MOX/70% coKtμ, etc.

Metal soaps include sodium laurate, calcium laurate, barium laurate, magnesium laurate, lead laurate, zinc laurate, aluminum laurate, lithium laurate, sodium stearate, calcium stearate, barium stearate, and stearin. Magnesium acid, lead stearate,
Zinc stearate, aluminum stearate, lithium stearate, sodium myristate, calcium myristate, barium myristate, magnesium myristate, lead myristate, zinc myristate,
Aluminum myristate, lithium myristate, sodium behenate, calcium behenate, barium behenate, magnesium behenate, lead behenate, zinc behenate, aluminum behenate, lithium behenate, lithium l-cohydroxystearate, sodium oleate , stearyl acid phosphate, magnesium stearyl acid phosphate, aluminum stearyl anrad phosphate, calcium stearyl anrad phosphate, zinc stearyl acid phosphate, barium stearyl acid phosphate, aluminum lauryl acid phosphate, zinc lauryl acid phosphate, sodium lauryl sulfonate,
Examples include sodium stearyl sulfonate, zinc lauryl sulfonate, zinc stearyl sulfonate, calcium lauryl sulfonate, calcium stearyl sulfonate, barium lauryl sulfonate, barium stearyl sulfonate, but are not particularly limited.

Examples of the particulate polymer include polypropylene, polyethylene, polyamide, polyvinylidene fluoride, polytetrafluoroethylene, polyethylene, and the like.

For example, as polyethylene fine particles, Frozen UF
-to (manufactured by Seitetsu Kagaku Kogyo ■), Micro Square (manufactured by Nisshin Kasei ■), Microballoon FTD-2oλ (manufactured by Toyo 1Tatsu ■), 1 Micro Balloon IG-10/ (manufactured by Toyo Soda ■), Polyethylene (Applied Chemically, polyethylene (Bokusui, manufactured by Braum) was used as fine particles of polytetrafluoroethylene such as Lubron L-5,
LeBlon L-2, LeBlon I, D-/, LeBlon I, D
Examples of fine particles of polyvinylidene fluoride include, but are not limited to, polyvinylidene fluoride (manufactured by Kureha), etc.

Various compounds can be used as the curable compound contained in the surface protective layer or photosensitive layer of the present invention. For example, compounds described in the Crosslinking Agent Handbook (published by Taiseisha, 1996) can be used.

For example, natural or synthetic rubber, unsaturated polyester,
Oxidize various resins with unsaturated bonds such as alkyd resins, or use polymerization initiators in the presence of unsaturated monomers.
A method of curing by light, heat, etc. A method of curing epoxy group-containing resins such as yjf oxy resins or epoxy group-containing acrylic resins with polyamines, polyamides, polycarboxylic anhydrides, etc., and methods of curing resins containing hydroxyl groups, carboxyl groups, amino groups, etc. with various polyisocyanates. Method of curing from reactive VC, self-crosslinking polyinsyanate,! : 9 curing method, crosslinking method by reaction of organic acid or acid anhydride with polyaquine, etc., but are not particularly limited thereto.

In the present invention, various crosslinking methods as described above can be used, but a crosslinking agent containing an incyanate group as a crosslinkable component is advantageously used. Examples of curing agents containing incyanate groups include triphenylmethane triisocyanate, diphenylmethane diisocyanate, toluylene diisocyanate, 2゜hiro-tolylene diisocyanate dimer, naphthylene-/, j-diisocyanate), and o-tolylene diisocyanate. , polymethylene polyphenyl incyanate, polyisocyanate types such as methylene diisocyanate, trimethylolpro/isoadduct of tolylene diisocyanate, adduct of oxnamethylene diisocyanate and water, trimethylolpropane and Examples include polyisocyanate adduct types such as adducts with xylylene diinocyanate. These can be used alone or in combination of λ or more types. these are,
Although it can be used as a moisture-curing type, it can also be used by mixing it with a compound containing other reactive groups such as hydroxyl group, carboxyl group, and amino group. For example, 71μm butanediol, ethylene glycol,
Polyether holi? Examples include polyol, polyester type polyol, acrylic type polyol, epoxy resin type polyol, μ, μ'-me, tylene bis(J-l loloaniline), hydroxypropylated ethylenediamine, and the like.

In addition to the above-mentioned moisture curing type and two-component mixture type incyanate compounds, blocked isocyanates blocked with phenols such as phenol and cresol, and alcohols can also be used.

When providing the improved surface protective layer, photosensitive layer, and back layer according to the present invention, conventional additives (plasticizers, etc.) may be added, if necessary, to improve the physical properties of these films.

The various curing agents described above can be further added to the back layer of the present invention, if necessary.

In the light-transmitting photosensitive recording material of the present invention, other layers may be provided between the support and the photosensitive layer, between the photosensitive layer and the surface protective layer, and between the support and the back layer, if necessary.

In addition to the above-mentioned electrophotographic recording materials, the technique for improving image defects of the present invention can be applied to
≠Octopus No. 1, Tokko Sho≠3-Hiroshi 22μ, Tokko Shoj≠-J
14Alr No. 41, JP-A No. 3-24R7, etc., or JP-A No. 33-2-ORR, JP-A-Sho! j-/! No. 3937, JP-A-Sho It-
It can be substantially applied to various photosensitive recording materials such as post-activated dry image forming materials described in No. A71rlAI and the like.

"Example" Examples of the present invention are shown below, but the present invention is not limited thereto.

Example 1 3 g of zinc phosphate, triacetylcellulose/! 1
1 methylene chloride j00rrtl in a ball mill
The mixture was dispersed for 0 hours to create a uniform dispersion.

The back surface of a commercially available conductive film TJ-100 (manufactured by Imajin) was subjected to discharge treatment, and the above dispersion was applied thereon to form a 0.1μ
A back layer of m was provided. Next, organic photoconductor (I)/l',
Sensitizing dye C■) 0.1g, polycarbonate (product name:
Regisan/2/-///JG, E, Co., Ltd. Hairy, polyester resin (trade name "Pylon 200" manufactured by Toyobo ■) 211 is dissolved in methylene chloride itoml, and this solution is poured onto the conductive layer of the above support. ! It was coated to a thickness of μm. Next, 10 g of silica (product name [Sairoitoko Hiro≠] manufactured by Fuji Davidson ■), polymethyl methacrylate (product name "Dyanal BR-IO" manufactured by Mitsubishi Kasei ■)
2 og of methyl ethyl ketone and 1 rooka of methyl ethyl ketone were uniformly dispersed in a ball mill for 10 hours.

This dispersion was applied onto the above photosensitive layer so that the film thickness after drying was 78 m, and dried to form a surface protective layer.

(I) (If) Cut the transparent electrophotographic film prepared as above,
After creating a long film with a width of /Amm, the long film was charged to +700V and a reduced image was exposed using a reflective original.
It was developed using Ricoh ##) and heat-fixed. After running this back and forth 2,000 times at a speed of '/m/sec in the running test device shown in Figure 1, a new Images were created using line drawings and continuous tone manuscripts. When these images were enlarged and projected 22 times and observed, it was found that the images formed after running had image defects or minute spots even in originals mainly consisting of line drawings such as characters and originals with continuous tone. There is no density unevenness, etc.
It was of extremely good quality. In addition, the images formed before the running test were found to maintain good quality with no toner missing or scratches on the back layer due to running.

Examples 2 to 4 The same procedure as in Example 1 was performed except that the fine particles, curing agent, and resin shown in Table 1 were used in place of Thyroid-2μ≠ and polymethyl methacrylate used in the surface protective layer of Example 1. An electrophotographic film was produced, and images formed before and after running were evaluated. In any electrophotographic film,
The images formed before the running test maintained good quality with no missing toner or scratches on the back layer due to running, and at the same time, the images formed after running were extremely clean and free of the various image defects mentioned above. The images were of good quality.

Table 1 Examples 5 to 7 Zinc stearate used in the back layer of Example 1.

An electrophotographic film was prepared in the same manner as in Example 1, except that the fine particles and resin shown in Table 1 were used instead of triacetyl cellulose, and the images before and after running were evaluated. For both electrophotographic films, the images formed before the running test maintained good quality, with no toner missing or scratches on the back layer due to running, and at the same time, the images formed after running were as good as those mentioned above. The image was of extremely good quality and free of various image defects.

Table 2 Example 8 Zinc laurate 3g, triacetylcellulose/! y,
A uniform coating solution was prepared by dispersing methylene chloride zooaa in a ball mill for 700 hours.

The back side of a commercially available conductive film 'l'J-100 (manufactured by Teishi ■) was subjected to discharge treatment, and a coating liquid was applied thereon, (1)
A back layer of jμ was provided. Next, the organic photoconductor (I) log used in Example 1, 0.1 g of the sensitizing dye (■), and polycarbonate (trade name "Lexa 7/21-///JG
Company E H) irg, z+) Ester resin (Product name "Byron-00" Toyobo ■W) 2. fi', 1 g of silica ("Aerosil R 71" manufactured by Nippon Aerosil ■) was dispersed in a ball mill for 5 hours to obtain a uniform coating solution. This coating solution was coated on the conductive layer of the support and dried to prepare a translucent electrophotographic film having a thickness of is μm. This film was cut to create a long film with a width of l≦7nrn.

Thereafter, images before and after running were evaluated in the same manner as in Example 1. Images formed before the running test maintained good quality with no toner missing or scratches on the back layer due to running, and at the same time, images formed after running were extremely good without any of the various image defects mentioned above. It was a high quality image.

Example 9 Silica (trade name “Aerosil R-27, 2J manufactured by Nippon Aerosil ■) / !ir, diacetyl cellulose ta I
A uniform coating solution was prepared by dispersing 300 ml of methylene chloride in a Zeel mill for io hours. One side of the PET film was subjected to discharge treatment, and the above coating solution was applied and dried on it to form a layer of 7,j μm.Next, on the side opposite to this layer, nitrocellulose 109 was coated with acetone J 00rdVC.
The dissolved coating solution was applied and dried to provide an intermediate layer of 0.3 μm door. Silver behenate 3y was added to 20 g of toluene/methyl ethyl ketone (volume ratio: 1:2) and dispersed in a ball mill for about λO hours to prepare a uniform silver behenate suspension.

A silver behenate emulsion was prepared by adding the following composition (IJ) to 5 g of silver behenate suspension. This behenate emulsion was applied onto the intermediate layer of the above support through a 100 μm orifice and dried. Next, the following composition (II) is applied on top of this.
Approximately 2 g of the reducing agent-containing solution was applied through a 7-μm orifice and dried to prepare a post-activated dry image-forming photosensitive film.

Composition [■] Methyl ethyl keto/solution of polyvinyl butyral (10% by weight) 2.09 mercury acetate methanol solution (10O In973cc) 0,
/ jmlα, α, α′, α′-tetrabromo-0-xylene Kojdatriphenylphosphite 3~iodine
tIn9 diphenylbromomethane l1my gonolin
3θ da composition (IIJ cellulose acetate t, Jl12
, λ'methylenebis(≠-ethyl-4-t-butylphenol) 3#fl phthalazinone / , 2g acetone 131 Next, polyvinyl butyral (trade name "Denka Butyral 2000-LJ")
(manufactured by Denki Kagaku Kogyo ■) 4g, toluylene diinicyanate/9, silica (trade name "Aerosil R-72") l,
! fi, dispersion diameter of methyl ethyl ketone j00rrl,
It was coated on the photoreceptor to form a surface protective layer of about 1 μm. This film was cut to a width of 4 rntn K to create a long film. This film was heated at 1000C for 3 seconds, exposed to a reduced image using a reflective original, and further heated at /20'C for 3 seconds. After this film was run back and forth 2000 times using the apparatus shown in FIG. 1, an image was formed again in the same manner as above. There were no scratches or the like due to running on both the front and back sides of the recording material (the images formed after running were of extremely good quality without the various image defects described above).

Comparative Example 1 The electrophotographic film without the protective layer used in Example I was evaluated for images before and after running in the same manner as in Example 1. The images formed after running had various density unevenness. When this image was enlarged and projected, some of the characters in the image were missing and became unreadable, making it unsuitable for practical use.

Comparative Example 2 In place of the surface protective layer used in Example 1, polymethyl methacrylate (trade name ``Dyanal B-to'' manufactured by Mitsubishi Kasei ■) 209. Images before and after running were evaluated in the same manner as in Example 1, except for layer Vc obtained by coating and drying 1zoaa of methyl ethyl ketone. The quality of the image after running was the same as that of Comparative Example 1, and was not suitable for practical use.

Comparative Example 3 The electrophotographic film used in Example 1 without the back layer was evaluated using the same method as in Example 1. Images before and after running were evaluated. Linear or dotted scratches occurred on the film after running. did.

The low-density areas of the toner image formed before traveling are affected by traveling.
Missing toner and the occurrence of linear or dotted scratches on the back surface of the support were observed. When this was enlarged and read, the minute scratches mentioned above were magnified and the quality was extremely low.

Example 10 The long films prepared in Example 1, Comparative Example 1, and Comparative Example 3 were wound on a reel with a core diameter of 20 mm at a tension of y4c 00.
It was wrapped for 11 days and stored for u months at 0°CfO%RH. After that, each film was charged to +700V, exposed to a reduced image using a reflective original, and then a liquid developer (
Developed using the product name [Ricoh MRPJ manufactured by Ricoh ■],
Heat fixing was performed.

When observed by enlarging and projecting 22 times, the image of the long film created in Example 1 was of good quality, but compared to Comparative Example 1.
In all images of the long film prepared in Comparative Example 3, density unevenness due to blocking was observed.

[Brief explanation of the drawing]

FIG. 1 shows a running test device for recording materials. The symbols in the figure have the following meanings. A1, A2: Recording material take-up roll (diameter λ0rI
LWL) B1, B2: Amendment document for roll procedures for running recording materials Showa to January 2017! p day 1, case description 1985 patent application No. 1J-31μ
No. 7, No. 3, Relationship with the case of the person making the amendment Patent applicant location 210 Nakanuma, Minamiashigara City, Kanagawa Prefecture Name (520) Fuji Photo Film Co., Ltd. Tun Target of amendment "Detailed description of the invention" column of the specification 5. The description in the "Detailed Description of the Invention" section of the description of the amendment is amended as follows. No.! Delete the lines from "hardening" on the 13th line of the page to "known" on the is line. Procedural amendment 1961 211 Commissioner of the Patent Office, 1st grade,
Indication of the case 1985 Patent Application No. 1!3jtμ7 No. 3, Relationship with the amended person case Patent applicant address 210 Nakanuma, Minamiashigara City, Kanagawa Prefecture Sekakuyu 106 Higashi 1; l
: 472 Nishima, Miyakominato-ku 'I' l 100-30・j Not yet amended Subject of amendment "Scope of Claims" of 11118
The statement in the column ``Detailed Description of the Invention'', Section 5, and ``Claims'' of the self-answered description of the amendment shall be amended as shown in the attached sheet. Note g in the "Detailed Description of the Invention" section of the specification is amended as follows. fil Correct [l:20J of the 1st line of the λth page to go'', l''. (2) In the third line of the page, after "It is possible.", the second paragraph says "The method for forming a squadron of the present invention can be carried out by a commonly known method depending on the recording material, but for example, for electrophotography. In case of "Electrography J (R, M, 5ch
by affert rElectrophoto-grap
by Fifth ImpressionJ (/rirOFocal Press London)J
This can be carried out by the method described on pages 7 to 3. That is, after the surface of the electrophotographic photosensitive material is positively or negatively charged using a corona charger or the like, 1. Due to IfIgI-like exposure, #electron mI3! form. Next, this is visualized by developing, and various developing methods can be used, such as various developing methods using dry toner, powder cloud methods, and methods using wet toner. In order to reproduce fine images or images with gradation, a liquid development method using wet toner is preferably used. Fixing methods include contact with hot air, heated rollers, etc., heat fixing by infrared rays, light, flash light, high frequency irradiation, etc., solvent theorem by contact with developer or vapor of the parent solvent of the photoreceptor, and pressure roller. A method such as the pressure theorem according to can be used. ” is inserted. (3) "Fuji Davison" described in Example 7 of Table λ on page 33 is corrected to "Fuji Davison." Attachment Claims fil A translucent photosensitive recording material comprising at least a photosensitive layer, a support, and a back layer, wherein the outermost layer on the side of the photosensitive layer contains at least fine particles or a curing agent, and the back layer contains at least fine particles. A translucent photosensitive recording material characterized by containing. (2) A long roll-shaped translucent photosensitive recording material comprising at least a photosensitive layer, a support, and a back layer, containing at least fine particles or a curing agent in the outermost layer on the side of the photosensitive layer;
Using a light-transmitting photosensitive recording material containing at least fine particles in the back layer, ILt is applied to an arbitrary position of the same recording material two or more times by a process including at least exposure and development.
An image forming method characterized by repeatedly performing image formation. (3) at least the surface f; ii a protective layer, a photosensitive layer, a support;
In a long roll-shaped light-transmitting photosensitive recording material comprising a back layer, the surface ev: protective layer contains at least fine particles or a curing agent in the middle layer, and the back layer contains at least fine particles. An image forming method characterized by using a recording material and repeatedly forming an image at an arbitrary position on the same recording material one or more times through steps including at least exposure and development.

Claims (3)

[Claims] (1) In a light-transmitting photosensitive recording material comprising at least a photosensitive layer, a support, and a back layer, the outermost layer on the side of the photosensitive layer contains at least fine particles or a curing agent, and the back layer contains at least fine particles. A translucent photosensitive recording material characterized by: (2) A long roll-shaped translucent photosensitive recording material comprising at least a photosensitive layer, a support, and a back layer, containing at least fine particles or a curing agent in the outermost layer on the side of the photosensitive layer;
Using a light-transmitting photosensitive recording material containing at least fine particles in the back layer, image formation is repeatedly performed at any position on the same recording material two or more times by a process including at least exposure and development. image forming method. (3) In a long roll-shaped light-transmitting photosensitive recording material comprising at least a surface protective layer, a photosensitive layer, a support, and a back layer, the surface protective layer contains at least fine particles or a curing agent, and the back layer Image formation characterized by repeatedly forming an image at any position on the same material two or more times by using a light-transmitting photosensitive recording material containing at least fine particles therein, through a process including at least exposure and development. Method.