JP3483935B2 - Method for regenerating recording material and image removal accelerating liquid composition used for the method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic copying machine in which a thermoplastic or heat-meltable image-forming substance is provided near the surface of a recording material, which is a layer in which at least an image-forming surface is swollen with a liquid containing water. , A printer, a thermal transfer printer, or a remelting method for making a recording material image-fixed by a hot melt ink jet image reusable, and an image removal accelerating liquid used in the regenerating method.

[0002]

2. Description of the Related Art Due to recent OA, printer paper and copying paper have come to be used in large quantities. As a result, the problem of deteriorating the global environment due to deforestation has become a problem. Conventionally, in order to solve this problem, the ink etc. on the used paper is removed (deinking),
The only option was to pickle it up, drain it again, and use it as recycled waste paper. However, as pointed out by Iwasaki et al. [Paper and Pulp Technology Times, 33 , 6 (1990)], OA waste paper is difficult to deink or bleach because the printing method is different from normal printing, and it is difficult to use conventional recycling technology alone. , Toner deinking is being studied [Tappi Journal
al, March, 102 (1986)], and there is a problem that the system is large and the cost is high.
However, recently, a paper has been developed in which a character image on a used paper can be removed by cleaning and reused for copying or printing. For example, Japanese Unexamined Patent Publication No. 4-67043 discloses that the surface of a sheet-like support, particularly one surface, is subjected to a release treatment, and the recording material subjected to the release treatment is marked to distinguish it from plain paper. Has been done. However, this is a special paper and has problems such as poor fixability, and thus there is a problem in using it as general copying paper. Further, JP-A-1-101576 and JP-A-1-101579 disclose that an image is removed by ultrasonically treating a toner on a recording material in an organic solvent that dissolves the toner. However, there are problems with pollution due to organic solvents, ignition and toxicity, and there is a problem with using it in general offices and homes. Japanese Patent Laid-Open No. 1-297294
In the publication, image recording materials such as plastic, metal,
The image formed on the recording material is heated with a heat-meltable peeling body interposed, and the image is peeled from the recording material by using paper or ceramic having poor liquid permeability. Although a cleaning method is disclosed, a special paper having a release treatment on its surface must be used. Therefore, the applicant of the present invention immerses a toner image obtained by an ordinary copying machine and other printing means without using a special paper in advance in an image removal accelerating liquid containing water, and peels off the image. We proposed reusable copying and printing paper by heating and erasing together with the body. However, since the image removal accelerating liquid is insufficiently wetted and penetrated into the recording material and the image forming substance such as the toner, reproduction failure may occur.

[0003]

[Object] An object of the present invention is to provide an image removal accelerating liquid having improved removal characteristics of an image forming substance mainly formed of a thermoplastic resin such as a toner or a heat melting resin. Another object of the present invention is to provide a method for reproducing a recording material, which comprises applying the image removal promoting liquid to the recording material and then removing the image without damaging the recording material.

[0004]

According to the present invention, at least the vicinity of the surface on which an image is formed is composed of a layer which swells with a liquid containing water (image removal accelerating liquid), and the layer exhibits thermoplasticity or heat melting property. The image-removing accelerating liquid is applied to the recording material on which the image-forming substance in the form of a sheet is adhered, the adhesive force between the film-shaped image of the recording material and the recording material is weakened, and the adhesive force is reduced. In a method for reproducing a recording material, wherein a hydrophobic image is peeled off from a paper-like layer by an image peeling means, an image removal promoting liquid containing at least one polyoxyethylene alkyl ether carboxylate as a surfactant is used. A method for reproducing a recording material, characterized by using
And an image removal promoting liquid containing at least one kind of polyoxyethylene alkyl ether carboxylate used in the reproducing method and water. The present invention relates to a recording material having a layer swelling with an image removal accelerating liquid at least in the vicinity of the surface on which an image is formed Toner, thermal transfer ink, hot-melt ink jet ink, or other thermoplastic or heat-meltable image-forming substance to form an image in the form of a film, that is, not substantially permeating the paper layer fiber wall. By applying an image removal accelerating liquid containing water as a main component and swelling the paper layer, the adhesiveness between the recording material and the image forming substance is weakened by utilizing the difference in swelling with the image forming substance. A method of scraping with a blade or a method of removing the image forming substance without damaging the surface layer of the recording material by contacting or press-contacting a member having higher adhesiveness with the image forming substance than the paper layer under heating. By image And removing. The recording material to be reproduced by the reproducing method of the present invention is a layer swelling with an image removal promoting liquid containing water at least in the vicinity of the surface on which an image is formed,
For example, it is composed of a paper layer whose main component is a polysaccharide natural polymer such as cellulose fiber, and mainly includes copying or printing paper, but not limited to these, and cellulose fiber can be used as a sheet-shaped member. It is not necessary that all the recording layers are paper layers as long as the recording material can form an image with a paper layer. The applicant of the present invention uses electrophotographic toner, thermal transfer ink, hot melt ink, etc. from a recording material containing cellulose fibers as a main component by an image removal accelerating liquid consisting of an aqueous solution containing a surfactant and / or a water-soluble polymer. Although a method of removing the formed film-like image-forming substance and reusing it is proposed by the present inventors, a polyoxyethylene alkyl ether carboxylate is added as a surfactant to the image-removal promoting liquid in the above method. The inventors have found that the image can be removed from the recording material by using it without damaging the surface of the recording material, and the present invention has been reached. This is because the polyoxyethylene ether carboxylate has a high wettability with respect to an image forming substance such as a toner and a high permeability with respect to a recording material.

As the polyoxyethylene alkyl ether carboxylic acid salt used in the present invention, those represented by the following formula (1) are preferable.

Embedded image R—O— (CH ₂ CH ₂ O) _m CH ₂ COOM (1) (In the formula, R is an optionally branched alkyl group having 6 to 14 carbon atoms, M is an alkali metal ion, Quaternary ammonium, quaternary phosphonium, alkanolamine cation, m: 1 to 10) Further, M in the above formula (1) is sodium ion, lithium ion, quaternary ammonium represented by the following formula (2), Four
A polyoxyethylene alkyl ether carboxylic acid salt selected from the group consisting of a primary phosphonium and an alkanolamine cation is more preferable because the release characteristics can be improved by improving the solubility of the surfactant.

[Chemical 4] (X: nitrogen or phosphorus, R ₃ to R _6: hydrogen, carbon atoms 1-4
Is at least one kind of group selected from the group consisting of an alkyl group, a hydroxyalkyl group and a halogenated alkyl group. )

Specific examples of the surfactant used in the present invention are shown below in the free acid form, but the surfactant used in the present invention is not limited to the following.

[Chemical 5] Further, these surfactants may be used alone or in combination of two or more. Commercially available surfactants containing the compound of formula (1) as a main component include:
ECTD3NEX available from Nikko Chemicals Co., Ltd.
(Trade name) [in the above formula (1), R: tridecyl group,
m: 3, M: Na], ECT3 (trade name) [Formula (1)
, R: tridecyl group, m: 3, M: H], EC
TD6NEX (trade name) [in the above formula (1), R: tridecyl group, m: 6, M: Na] and the like. The amount of these surfactants added is 0.01 to 20% by weight, preferably 0.1 to 5% by weight.

The image removal accelerating liquid used in the present invention is not limited to the polyoxyethylene alkyl ether carboxylic acid salt alone or a mixture of a plurality of these polyoxyethylene alkyl ether carboxylic acid salts. It is also possible to use a mixture of the other surfactants. Preparation of the polyoxyethylene alkyl ether carboxylic acid salt used in the present invention can be introduced, for example, by adding sodium hydroxide and lithium hydroxide to the corresponding free acid in the case of sodium salt and lithium salt, respectively. In addition, a quaternary ammonium salt,
In the case of a phosphonium salt or an alkanolamine cation, the corresponding free acid, for example, the following (2-1) to (2-
It can be introduced by adding the hydroxide and alkanolamine shown in 8).

[Chemical 6]

[Chemical 7] In order to reduce the dissolution stability and physical properties of the surfactant over time, the amounts of hydroxides and alkanolamines represented by the above formulas (2-1) to (2-8) should be the same as those in the above formula (1). It is preferably added in an amount of 30% by weight or more, more preferably 50% by weight or more, based on the number of moles of the compound.

All of the cation ions of the polyoxyethylene alkyl ether carboxylate salt used in the present invention are selected from the group consisting of alkali metals, quaternary ammonium, quaternary phosphounimes and alkanolamine cations. It is not necessary that some of the cations be cations other than those in the above groups. As the other surfactant, it is preferable to add one having high stability of dispersion or dissolution in water. Specific examples of the anionic surfactant include soap, N-acyl amino acid salt, alkyl ether acetate, carboxylate such as acylated peptide, alkyl sulfonate, alkyl benzene sulfonate, alkyl naphthalene sulfonate, and sulfo. Sulfonates such as succinates, α-olefin sulfonates, N-acyl sulfonates, sulfated oils, sulfates such as alkyl sulfates, alkyl ether sulfates and alkylamide sulfates, alkyl phosphates , Phosphoric acid ester salts such as alkyl ether phosphates and alkyl aryl phosphates. Examples of cationic surfactants include aliphatic amine salts, alkyl quaternary ammonium salts, aromatic quaternary ammonium salts, and heterocyclic quaternary ammonium salts. Examples of the amphoteric surfactant include betaine types such as carboxybetaine and sulfobetaine, aminocarboxylic acid salts, and imidazoline derivatives. As the nonionic surfactant, polyoxyethylene alkyl and aryl ethers, polyoxyethylene styrene ethers, polyoxyethylene lanolin derivatives, ethylene oxide derivatives of alkylallyl formaldehyde condensates,
Polyoxyethylene polyoxypropylene block copolymer, ether type such as polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene glycerin fatty acid ester, polyoxyethylene sorbitan fatty acid ester, ether ester type such as polyoxyethylene sorbitol fatty acid ester, Ester systems such as polyethylene glycol fatty acid ester, fatty acid monoglyceride, polyglycerin fatty acid ester, sorbitan fatty acid ester, propylene glycol fatty acid ester, sucrose fatty acid ester, aliphatic alkanolamide, polyoxyethylene fatty acid amide, polyoxyethylene alkylamine, alkylamine oxide And the like nitrogen-containing systems. Examples of the fluorinated surfactants include anionic ones such as fluoroalkylcarboxylic acid salts and fluoroalkylsulfonic acid salts, amphoteric ones such as fluoroalkyl-introduced betaine, nonionic ones and cationic ones. Examples of the silicone-based surfactant include polyoxyalkylene-modified siloxane and carboxylated polyoxyalkylene-modified siloxane. The amount of each surfactant added is in the range of 0.01 to 10% by weight so as not to impair the effect of the polyoxyethylene alkyl ether carboxylate surfactant.

A water-soluble polymer is added to the image removal accelerating liquid together with a surfactant for the purpose of improving the peeling property utilizing the adhesiveness and improving the reproduction condition such as the strength of the recording material. As a water-soluble polymer that can be added to the image removal accelerating liquid, in natural systems, gum arabic, traggan gum, guar gum, karaya gum, locust bean gum, arabinogalactone, pectin, quince seed starch and other plant polymers, alginic acid, carrageenan. , Seaweed macromolecules such as agar, and fungi, animal macromolecules such as gelatin, casein, albumin, collagen, microbial macromolecules such as xanthene gum and dextran, and methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropyl for semi-synthetic systems Cellulose, fibrin-based polymers such as carboxymethyl cellulose, soluble starch,
Carboxymethyl starch (CMS), dialdehyde starch, starch-based polymers such as sodium starch glycolate and starch phosphate sodium, seaweed-based polymers such as sodium alginate and propylene glycol alginate, polyvinyl alcohol in pure synthetic system, Polyvinylpyrrolidone, polyvinyl polymers such as polyvinyl methyl ether, non-crosslinked polyacrylamide,
Polyacrylic acid and its alkali metal salts, acrylic resins such as water-soluble styrene acrylic resin, water-soluble styrene maleic acid resin, water-soluble vinyl naphthalene acrylic resin,
Water-soluble vinyl naphthalene maleic acid resin, polyvinyl pyrrolidone, polyvinyl alcohol, β-naphthalene sulfonic acid formalin condensate alkali metal salt, a polymer compound having a salt of a cationic functional group such as quaternary ammonium or amino group in the side chain, Examples include natural polymer compounds such as shellac. The amount of the water-soluble polymer added to the image removal accelerating liquid varies depending on the method of applying the image removal accelerating liquid to the recording material, but is in the range of 0.1 to 20% by weight, preferably 0.1 to 10% by weight. Is added in. A pH adjusting agent is added to the other image removal promoting liquid. By setting the pH of the image removing solution to 6 or more, the storage stability of the solution can be improved. Any pH adjusting substance can be used as long as it can adjust the pH to 6 or more without adversely affecting the image removal promoting liquid.

As examples thereof, amines such as diethanolamine and triethanolamine, hydroxides of alkali metal elements such as lithium hydroxide, sodium hydroxide and potassium hydroxide, ammonium hydroxide, quaternary ammonium hydroxide, and Examples thereof include quaternary phosphonium hydroxide, carbonates of alkali metals such as lithium carbonate, sodium carbonate and potassium carbonate. As the antiseptic / antifungal agent, sodium dehydroacetate, sodium sorbate, sodium 2-pyridinethiol-1-oxide, sodium benzoate, sodium pentachlorophenol and the like can be used in the present invention. Examples of the chelating agent that is added as a peeling aid with a sealing agent for heavy metal ions include sodium ethylenediaminetetraacetate, sodium nitrilotriacetate, sodium hydroxyethylethylenediaminetriacetate, sodium diethylenetriaminepentaacetate, and sodium uramildiacetate. . As the rust preventive, for example, acidic sulfite,
There are sodium thiosulfate, ammonium thiodiglycolate, diisopropylammonium nitrite, pentaerythritol tetranitrate, dicyclohexylammonium nitrite and the like. Further, a bleaching agent can be added for the purpose of improving the whiteness of the recording material after reproduction. Specific examples of the oxidative bleaching agent include hydrogen peroxide, sodium peroxide, sodium percarbonate, sodium hypochlorite and the like. Fluorescent dyes, bluing dyes, enzymes, etc. can also be added.
The contact angle of the image removal accelerating liquid with an image forming substance such as toner is preferably 90 degrees or less, more preferably 5 degrees.
It is 0 degrees or less. The surface tension is 70 mN / m.
(Dyne / cm) or less, more preferably 50 mN /
m or less. The permeation rate of the image removal promoting liquid into the recording material is 10 ml / m ² or more, preferably 12 ml / m ² or more at t (contact time between the liquid containing water and the recording material) = 0.4 seconds. . The image is peeled off from the recording material by pressing, heating or contacting the recording material impregnated with the image removal promoting liquid with the image transfer body.

Incidentally, as shown in FIG. 2, a preferable thermoplastic or heat-melting substance as an image forming substance for forming a film-like image which does not substantially penetrate the paper fiber wall is polystyrene, alkyl polyacrylate, polyalkyl methacrylate. , Styrene-acrylonitrile copolymer, styrene-acryl copolymer, styrene-butadiene copolymer, polyamide, polyethylene, polypropylene, alkyd resin, epoxy resin, polyvinyl acetate, ethylene vinyl acetate copolymer (EVA), It is preferable to contain at least one kind of thermoplastic resin such as saturated polyester, polyvinyl chloride and silicone resin. Examples of the coloring material include inorganic and organic pigments such as carbon black, quinacridone derivatives, phthalocyanine derivatives, benzidine yellow, and oil-soluble dyes. Further, a charge control agent is added in the electrophotographic system, various waxes are added as a vehicle, and a rosin (abietic acid) derivative is added as an adhesive, which contains various additives depending on the image forming method. In the present invention, the shape of the peeling member that transfers the image forming substance from the recording material may be belt-like or roll-like, and examples of the material thereof include various polymers and metals such as aluminum and nickel. Also, a structure in which a metal and a polymer are laminated can be used. Examples of the polymer sheet include polyethylene terephthalate, polyimide, polyether sulfone, polycarbonate, polyarylate, aramid, and polyether ether ketone. These may contain an inorganic filler such as carbon, calcium carbonate, or titanium oxide for the purpose of improving durability.

An example of an apparatus using the peeling member used in the present invention is shown in FIG. A guide plate by a paper feed roller 2 from a paper feed tray 1 that supplies a recording material having a surface layer that swells with a liquid containing water such as cellulose on which a film-shaped image forming substance such as electrophotographic toner and thermal transfer ink is formed. Three
The sheet is guided to the peeling roller 5 by the transport roller 4 through. An image removal promoting liquid 7 is applied to the surface of the peeling roller 5 by a liquid supply roller 6, and the recording material conveyed from the conveying roller 4 is coated and impregnated with the image removal promoting liquid 7. The image-removal promoting liquid 7 is applied and impregnated, and the recording material in contact with the peeling member is heated and pressure-contacted by the heating roller 8, and then the separating member 9 separates the peeling member from the recording material. The separated peeling member is cleaned from the surface of the peeling roller 5 by the image forming substance cleaning unit 10 such as toner, and again from the surface of the peeling roller 5, and the image removal promoting liquid is applied to the surface of the peeling roller 5 again. To be done. Further, in the above apparatus, at least one heat roller capable of retransferring the image forming substance of the peeling roller 5 is provided adjacent to the peeling roller 5, and at least one of the heat rollers is retransferred onto the roller. By providing a blade capable of scraping off the image forming substance and scraping off the image forming substance by the blade, the peeling roller 5 can be cleaned. On the other hand, the image of the recording material separated by the separation claw 9 is erased, guided by the conveying roller 11 onto the drying belt 12, and dried. The image-free recording material that has been dried is ejected to the paper ejection tray 13 by the conveyance roller 11,
A recording material that can be re-copied and re-printed can be obtained. Next, examples of the present invention will be specifically described.

[0013]

EXAMPLES Examples of the present invention will be specifically described below. Example 1 A composition having the following formulation was dissolved by stirring and adjusted to a pH of 8 with a 10% lithium hydroxide solution to prepare an image removal promoting liquid a. Compound (1-1) 1% Na dehydroacetate 0.1% Lithium hydroxide 0.1% Pure water Remaining amount Styrene acrylic copolymer (glass transition temperature: 60
(° C): 90% by weight, carbon black: 5% by weight, and a metal-containing azo dye as a charge control agent: 5% by weight, and a commercially available high-quality paper (Ricoh PPC paper type) in an electrophotographic PPC copier. An image was formed on 6200 (trade name), and the image removing liquid a was used to heat and press contact with a peeling member made of PET, and the image was erased by the apparatus shown in FIG. The obtained recycled paper had a high whiteness and no residual image of toner was observed. When it was reused in the above copying machine, a beautiful copied image could be obtained. Similarly, the reproduction state of the recording material was examined for Examples 2 to 7 and Comparative Examples 1 to 7.

Example 2 An image removal accelerating liquid b was prepared by stirring and dissolving with the following formulation and adjusting the pH to 9 with sodium hydroxide. Compound (1-5) 2% Specific example (2-1) 25% liquid 0.8% Na sorbate 0.1% Pure water Remaining amount Example 1 except using a toner in which the styrene acrylic copolymer was changed to polyester When an image was erased on a commercially available high-quality paper in the same manner as in, the whiteness was high and re-copying was possible.

Example 3 An image removal accelerating liquid c was prepared by stirring and dissolving with the following formulation and adjusting the pH to 9 with lithium hydroxide. Compound (1-7) 0.5% Softanol 70 0.5% (Nippon Shokubai Co., Ltd .: polyoxyethylene secondary alkyl ether surfactant trade name) Specific example (2-3) 25% liquid 0.1% Benzo Acid Na 0.1% pure water Remaining amount When the image was erased in the same manner as in Example 1, there was no toner residual image, and re-copying was possible.

Example 4 An image removal accelerating liquid d was prepared by dissolving with stirring with the following formulation and adjusting the pH to 8 with lithium hydroxide. Compound (1-9) 0.3% Softanol 120 0.5% (Nippon Shokubai Co., Ltd .: polyoxyethylene secondary alkyl ether surfactant trade name) Pentachlorophenol Na 0.1% Pure water Remainder Example 2 When the image was erased in the same manner as above, there was no residual image of toner and it was reusable.

Example 5 An image removal promoting liquid e was prepared according to the following formulation. Compound (1-8) 1% Compound (1-12) 0.2% Sodium percarbonate 0.1% 2-Pyridinethiol-1-oxide Na 0.1% Pure water Remaining amount Carnauba wax: 30% by weight, Paraffin wax: 20% by weight, EVA: 30% by weight, carbon black: 10% by weight, Nigrosine: 10% by weight of thermal transfer ink and an ink ribbon of a polyester base film on a commercial high-quality thermal transfer paper using a thermal head of 300 dpi. An image was formed on the sample and the image was erased using the image removing liquid e in the same manner as in Example 1. As a result, the whiteness was high and re-recording was possible.

Example 6 An image removal accelerating liquid f was prepared by stirring and dissolving with the following formulation and then adjusting the pH to 8 with sodium hydroxide. ECTD3NEX (trade name, manufactured by Nikko Chemicals Co., Ltd.) 1% Polyvinyl alcohol 0.5% Pentachlorophenol Na 0.1% Pure water Remaining amount When image erasing was performed in the same manner as in Example 5, there was no afterimage of the image and re-copying. It was possible.

Example 7 An image removal accelerating liquid g was prepared according to the following formulation. ECTD6NEX (Nikko Chemicals product name) 0.5% Softanol 120 0.5% (Nippon Shokubai: polyoxyethylene alkyl ether surfactant product name) Benzoic acid Na 0.1% CMC 0.2% Pure water residue When the image was erased in the same manner as in Example 1, there was no toner residual image and re-copying was possible.

Comparative Example 1 The same as Example 1 except that the compound (1-1) of the image removal accelerating liquid a was replaced with BT5 (manufactured by Nikko Chemicals: pentaoxyethylene secondary alkyl ether type surfactant). When the image removal accelerating liquid h was similarly erased on the type 6200 paper, a slight residual image of the toner image was observed.

Comparative Example 2 Except that the compound (1-5) of the image removal accelerating liquid b of Example 2 was removed and changed to Softanol 300 (manufactured by Nippon Shokubai: polyoxyethylene secondary alkyl ether type surfactant). Similarly, when image erasing was performed on commercially available high-quality paper as the image removal accelerating liquid i, a slight residual image of the toner image was recognized.

Comparative Example 3 Image erasing on commercial high-quality paper was performed in the same manner as image removal accelerating liquid j except that (1-7) of image removal accelerating liquid c of Example 3 was removed. An afterimage of the toner image was observed on the.

Comparative Example 4 Image erasing on commercial high-quality paper was performed in the same manner as image removal accelerating liquid k except that (1-9) of image removal accelerating liquid d of Example 4 was removed. An afterimage of the toner image was observed on the.

Comparative Example 5 When image erasing was performed on commercially available high-quality paper as image removal accelerating solution l in the same manner except that ECTD3NEX of image removal accelerating solution f in Example 6 was removed, a slight residual image of the toner image was observed. Was given.

[0025]

【effect】

(1) According to the present invention, by adding a polyoxyethylene alkyl ether carboxylic acid salt to an image removal accelerating liquid, wetting of a recording material and electrophotographic toner, thermal transfer ink, and other film-like image-formed products. By improving the property, it is possible to provide an image removal promoting liquid having excellent image removal properties. (2) According to the present invention, the compound (1) as a polyoxyethylene alkyl ether carboxylic acid salt is added to an image removal promoting liquid to provide an image removal promoting liquid having improved image removing properties and peeling properties. You can (3) According to the present invention, by selecting the cation of the compound (1), it is possible to provide an image removal accelerating liquid which is excellent in stability of image removal over time. (4) According to the present invention, by adding a water-soluble polymer to the image removal accelerating liquid of (1) to (3), the peeling property is improved and the properties such as the strength of the recording material after reproduction are improved. It is possible to spread the use of reuse. (5) According to the present invention, there is provided a peeling member which is easily adhered to the film-like image formed product which is more thermoplastic or heat-meltable than the recording material after the image removal promoting liquid is applied to the recording material. In a method of reproducing a recording material in which an image is removed under heating or under pressure by using an image removal accelerating liquid containing polyoxyethylene alkyl ether carboxylate, the surface of the recording material is not damaged without being damaged. The recording material can be reproduced well. Therefore, according to the present invention, a film-like image-forming substance such as toner formed by a copying machine or a printer can be erased without damaging the surface of the recording material, and the whiteness can be increased to improve re-copying and re-printing properties. Since good recycled paper can be obtained, the effect of reducing paper consumption can be further enhanced.

[Brief description of drawings]

FIG. 1 is a schematic view of an apparatus used in the reproducing method of the present invention.

FIG. 2 is a diagram schematically showing a cross section of a recording material.

[Explanation of symbols]

1 Paper tray 2 paper feed rollers 3 guide plates 4 Conveyor rollers 5 peeling roller 6 Liquid supply roller 7 Image removal promoting liquid 8 heating roller 9 separate nails 10 Image forming substance cleaning section 11 Conveyor roller 12 Drying belt 13 Output tray 14 Conveyor rib 15 Collection container for collected image-forming substances 16 Image-formed product formed in film form 17 Recording material

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-6-206358 (JP, A) JP-A-7-121072 (JP, A) JP-A-4-300395 (JP, A) JP-A-3- 249661 (JP, A) JP 4-91298 (JP, A) JP 7-152290 (JP, A) JP 57-125962 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G03G 7/00 G03G 21/00 B41M 5/26

Claims (8)

(57) [Claims] 1. A film-like film having a layer swelling at least in the vicinity of the surface on which an image is formed, swelled by a liquid containing water (image removal accelerating liquid), and showing thermoplasticity or heat melting property in the layer. After the image removal promoting liquid is applied to the recording material to which the image forming substance is fixed to weaken the adhesive force between the film-shaped image of the recording material and the recording material, and the adhesive force is reduced, In a method of reproducing a recording material, which is characterized in that an image is peeled from a paper-like layer by an image peeling means,
A method for reproducing a recording material, wherein the image removal promoting liquid contains at least one kind of polyoxyethylene alkyl ether carboxylate and water. 2. The method for reproducing a recording material according to claim 1, wherein the polyoxyethylene alkyl ether carboxylate is represented by the following formula (1). Embedded image R—O— (CH ₂ CH ₂ O) _m CH ₂ COOM (1) (R: optionally branched alkyl group having 6 to 14 carbon atoms, M: alkali metal ion, quaternary Ammonium, quaternary phosphonium, alkanolamine cation, m:
1-10) 3. The method for reproducing a recording material according to claim 2, wherein in the polyoxyethylene alkyl ether carboxylate, M in the above formula (1) is represented by sodium ion, lithium ion and the following formula (2). A method for reproducing a recording material selected from the group consisting of quaternary ammonium and quaternary phosphonium. [Chemical 2] (X: nitrogen or phosphorus, R ₃ to R _6: hydrogen, carbon atoms 1-4
Is at least one kind of group selected from the group consisting of an alkyl group, a hydroxyalkyl group and a halogenated alkyl group. ) 4. A film-like image-forming substance having thermoplasticity or heat-melting property, which comprises at least one polyoxyethylene alkyl ether carboxylic acid salt and water. An image removal accelerating liquid used in a method of reproducing a recording material. 5. The image removal promoting liquid according to claim 4, wherein the polyoxyethylene alkyl ether carboxylate is represented by the above formula (1). 6. The image removal accelerating liquid according to claim 5, wherein the polyoxyethylene alkyl ether carboxylate is a quaternary compound in which M in the above formula (1) is sodium ion, lithium ion, or the above formula (2). An image removal promoting liquid selected from the group consisting of ammonium and quaternary phosphonium. 7. The image removal promoting liquid according to claim 4, 5 or 6, which contains a water-soluble polymer. 8. The image removal promoting liquid according to claim 4, 5, 6 or 7, wherein the concentration of the polyoxyethylene alkyl ether carboxylate is 0.01 to 20% by weight.