JPH1039702A - Image removal accelerating liquid and method for regenerating material to be recorded by using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image removal accelerating liquid which is capable of sufficiently peeling and removing hydrophobic images from materials to be recorded which have the hydrophobic images formed by thermally flexible or thermally softenable image forming materials by using the liquid in a small amt. and obviates the occurrence of elongation, waving, curing, etc., in the regenerated material to be recorded and a method for regenerating material to be recorded by using the same. SOLUTION: This image removal accelerating liquid consists of an aq. soln. contg. a water-soluble material which is solid at ordinary temp. and has a m.p. of 30 to 160 deg.C and a surfactant. The image removal accelerating liquid is applied to the materials to be recorded with are formed of the thermally flexible or thermally softenable image forming materials and have the hydrophobic images. The hydrophobic images and a peeling member are then brought into contact with each other under heating and pressure to transfer the hydrophobic images to the peeling member, by which the hydrophobic images are peeled and removed from the materials to be recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reproducing a recording material by peeling and removing a hydrophobic image from a recording material having a hydrophobic image formed of a thermoflexible or thermosoftening image forming substance. The present invention relates to an image removal accelerating liquid used in the method and a method for reproducing a recording material using the image removal accelerating liquid.

[0002]

2. Description of the Related Art Recently, OA has increased the use of printer paper and copy paper in large quantities, and the deforestation of forests has caused a problem of deterioration of the global environment due to the production of large quantities of paper. ing. In addition, a large amount of waste paper has been generated from offices, and most of the paper has been wasted. In order to solve this problem and to recycle paper, for example, Japanese Patent Application Laid-Open No. Hei 7-13383 discloses that at least a part of a paper layer mainly composed of cellulose fiber is used, A recording material on which a hydrophobic image formed of ink (toner) is formed is impregnated with an image removal accelerating liquid such as water or an aqueous solution of a surfactant and / or a water-soluble polymer, and the hydrophobic image is formed on the image peeling member. A method of reproducing a recording material in which a hydrophobic image is removed from a paper layer by transferring is disclosed. This reproduction method is a very effective method for reproducing a recording material because it can remove a hydrophobic image without damaging the recording material. However, since a large amount of an image removal accelerating liquid is used, the reproduced recording material is used. Elongation, wrinkling, waving, curling, and the like may occur in the material.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve such a problem and to use a small amount of a hydrophobic image formed by a thermo-flexible or thermo-softening image-forming substance. An object of the present invention is to provide an image removal accelerating liquid which can sufficiently peel off and remove a hydrophobic image from a recording material and does not stretch, wrinkle, wavy or curl the reproduced recording material. Another object of the present invention is to provide a recording material reproducing method for reproducing a recording material suitable for reuse in image formation such as copying or recording using the image removal accelerating liquid. .

[0004]

An object of the present invention is to provide an image removal accelerating liquid comprising an aqueous solution containing a water-soluble substance having a melting point of 30 ° C. to 160 ° C. and a surfactant at room temperature. Achieved by Further, the object of the present invention is to apply an image removal accelerating liquid to a recording material having a hydrophobic image formed of a thermo-flexible or thermo-softening image forming substance, and to form a hydrophobic image and a peeling member. In a method for reproducing a recording material, in which the hydrophobic image is transferred to a release member by peeling off the recording material by contacting the recording medium under heating and pressure, the image removal accelerating liquid is solid at room temperature and has a melting point of 30 ° C.
This is achieved by a method for reproducing a recording material, which is an aqueous solution containing a water-soluble substance and a surfactant at a temperature of up to 160 ° C.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
Representative examples of the water-soluble substance which is solid at ordinary temperature and has a melting point of 30 ° C to 160 ° C are shown below, but are not limited thereto. In addition, the parenthesis shows the melting point.

That is, typical examples of water-soluble substances which are solid at ordinary temperature and have a melting point of 30 to 160 ° C. include camphoric acid (106 to 107 ° C.), 9,10-dihydroxystearic acid (99 to 100 ° C.) β, β-dimethylacrylic acid (69-70 ° C), α, β-cis-dimethylacrylic acid (45 ° C), α, β-trans-dimethylacrylic acid (64-65 ° C), sodium formate (124 ° C),
Glycolic acid (78-81 ° C), glyoxylic acid (98
° C), 2-hydroxybutyric acid (41 ° C), 3-hydroxybutyric acid (49 ° C), α-hydroxy-iso-valeric acid (8
6 ° C), monomethyloxalic acid (37 ° C), sulfoacetic acid 2
Hydrate (84-86 ° C), 2-butyric acid (78 ° C), pivalic acid (41 ° C), methoxyacetic acid (77 ° C), acetoacetic acid (37 ° C), crotonic acid (71.5-71.7) C)), a monocarboxylic acid and a salt thereof, butylmalonic acid (1
01.5 ° C.), 2,2-dimethylsuccinic acid (144
° C), α-ethylglutaric acid (60.5 ° C), β-ethylglutaric acid (73 ° C), ethylmalonic acid (115
° C), ethylsuccinic acid (98 ° C), glutaric acid (98 ~
99 ° C.), 3-hydroxyglutaric acid (95 ° C.), malonic acid (135 ° C.), citric acid monohydrate (100-132)
° C), α-methyladipic acid (64 ° C), β-methyladipic acid (93-94.5 ° C), α-methylglutaric acid (78-80 ° C), β-methylglutaric acid (86-87).
C), n-propylmalonic acid (96C), iso-propylmalonic acid (87C), n-propylsuccinic acid (92C).
-93 ° C), methyl succinic acid (111-112 ° C), sugar acid (saccharic acid) (125-126 ° C), methoxysuccinic acid (88-90 ° C), l-malic acid (100
C), α-ketoglutaric acid (115.5 ° C), citraconic acid (92.8-93.8 ° C), mesoxalic acid (119
-120 ° C.), tropine (63 ° C.), 1,10-decanediol (72-73 ° C.), 2,3-hexanediol (60 ° C.
C), pinacol (41-43), 2,3-butanediol (34.4C), 2-butyne-1,4-diol (58C), 1,6-hexanediol (42.8).
° C), 1,8-octanediol (59-61 ° C), α
Alcohols such as sorbitol (110-112 ° C), esters such as glycerol diacetate (40 ° C), glycolide (86-87 ° C), diacetylacetone (49 ° C), dihydroxyacetone (83 ° C), N,
N'-dimethylthiourea (56-58 ° C), N, N'-
Dimethylurea (108 ° C), N-ethylthiourea (11
4 ° C.), N-ethylurea (92 ° C.), hydroxyiminoacetone (69 ° C.), N-methylthiourea (120.5
-121 ° C), N-methylurea (101-102 ° C),
Nn-propyl urea (107 ° C.), N, N, N′-trimethyl urea (75.5 ° C.), trans-thioacetaldehyde trimer (81 ° C.), cis-thioacetaldehyde trimer (126 ° C.) , Ketones such as lactaldehyde dimer (105 ° C), thioketones or aldehydes, formylhydrazine (54 ° C), glycerol diamine (42 ° C), glycinamide (65-67 ° C), glycolamide (120 ° C), heptano Ick amide (95-96 ° C), 1,6-hexanediamine (45-
46 ° C.), hexamethylene diamine (34.2 ° C.), imino-diacet-dinitrile (78 ° C.), lactamide (79 ° C.), methyl-iso-propylketone semicarbazone (110-114 ° C.), ethyl oxamate ( 1
14-115 ° C), propionic aldehyde semicarbazone (88-89 ° C), propionamide (79-8)
0 ° C), n-propyl carbamate (60-61 ° C),
Pyruvamide (124-125 ° C), semicarbazide (96 ° C), thioacetamide (115-116 ° C),
Urethane (49-50 ° C), acetamide (82 ° C),
3-aminopyridine (65 ° C), 2-aminopyridine (58 ° C), diacetamide (78-79 ° C), guanidine (50 ° C), capromamide (101.5 ° C), methyl carbamate (58-56 ° C) ), Caprolactan (69.2 ° C), ethylamine hydrochloride (107-108)
C)), amines or amides such as formamide oxime (114C), or glycolic anhydrides (128-1
30 ° C.), methyl ethyl sulfone (36 ° C.), pyrazine (57 ° C.), pyrazole (70 ° C.), pyridine hydrochloride (82 ° C.) or imidazole (90 ° C.). These can be used alone or as a mixture of several types. Solid at normal temperature, melting point 30 ~ 160 ℃
Is preferably dissolved in water at room temperature in an amount of 10% by weight or more.

The surfactant used in the present invention may be any of anionic, cationic, nonionic and amphoteric surfactants, and specific examples thereof include polyoxyethylene alkyl ethers. , Polyoxyethylene alkylphenyl ethers, polyoxyethylene alkyl esters, polyoxyethylene alkyl sorbitan esters, polyoxyethylene alkylamines, glycerin fatty acid esters, decaglycerin fatty acid esters, polyglycerin fatty acid esters, sorbitan fatty acid Esters, propylene glycol fatty acid esters, polyethylene glycol fatty acid esters, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene polyoxypropylene block Nonionic surfactants such as polymers, perfluoroalkyl phosphates, polyoxyethylene-modified polydimethylsiloxanes, higher fatty acid salts, N-acyl amino acid salts, polyoxyethylene alkyl ether carboxylate, acylated peptides, alkyl Sulfonate, alkylbenzene sulfonate, alkylnaphthalene sulfonate, mono- or dialkyl sulfosuccinate, α-olefin sulfonate, N-acyl sulfonate, alkyl sulfate, polyoxyethylene alkyl ether sulfate, poly Oxyethylene alkyl aryl ether sulfate, alkyl amide sulfate, monoalkyl phosphate, dialkyl phosphate, trialkyl phosphate, monopolyoxyethylene alkyl ether phosphate,
Bispolyoxyethylene alkyl ether phosphate, tris polyoxyethylene alkyl ether phosphate, polyoxyethylene alkyl aryl ether phosphate, perfluoroalkyl carboxylate, perfluoroalkyl sulfonate, perfluoroalkenyl aryl sulfonate, N -Perfluorooctanesulfonylglutamate, perfluoroalkyl-N-ethylsulfonylglycine salt, 3- (ω-fluoroalkanoyl-N-ethylamino) -1-propanesulfonate, perfluoroalkylethylphosphate, carboxylic acid Anionic surfactants such as modified polydimethylsiloxane and sulfonic acid-modified polydimethylsiloxane; higher alkylamine salts; higher alkyl quaternary ammonium salts; alkylbenzeneamine salts; Kirubenzen quaternary ammonium salts, cationic surfactants such as alkyl heterocyclic quaternary ammonium salts, betaines, and the like ampholytic surface active agents such as amino acids.

Of these, compounds having a sulfosuccinic acid alkyl ester structure are particularly preferable because they are excellent in peeling and removing a hydrophobic image from a recording material. Examples of such compounds include surfactants having a mono- or dialkylsulfosuccinic acid alkyl ester salt structure, and compounds having a sulfosuccinic acid alkyl ester structure isolated as an acid by exchanging counter ions of these surfactants. be able to.

The image removal accelerating liquid of the present invention can be easily obtained by dissolving a water-soluble substance having a melting point of 30 ° C. to 160 ° C. in water at room temperature and then mixing and dissolving a surfactant in the solution. be able to. At room temperature, it is solid and has a melting point of 3.
By using a water-soluble substance at 0 ° C. to 160 ° C., an image removal accelerating liquid comprising an aqueous solution containing a surfactant in a high concentration can be obtained.

The content of the water-soluble substance which is solid at ordinary temperature and has a melting point of 30 ° C. to 160 ° C. in the image removal accelerating liquid of the present invention is preferably 1 to 60% by weight, particularly preferably 10 to 50% by weight. If the amount is less than 1% by weight, it becomes difficult to dissolve and contain the surfactant at a high concentration, and it becomes impossible to sufficiently peel and remove the hydrophobic image from the recording material.
If it exceeds 60% by weight, the surfactant can be dissolved and contained at a higher concentration, but the water-soluble substance remains on the surface or inside of the reproduced recording material, and the reproduced When the recording material is reused for image formation such as copying or recording, the fixability of the formed image is adversely affected.

The content of the surfactant in the image removal accelerating solution of the present invention is preferably from 10 to 70% by weight, particularly preferably from 20 to 60% by weight. When the content of the surfactant is small, it cannot affect the peeling of the hydrophobic image. When the content of the surfactant is large, the viscosity of the image removal accelerating liquid increases and the recording material forming the hydrophobic image is formed. It becomes difficult to apply to the recording medium, and the amount of the surfactant remaining on the reproduced recording material by peeling off and removing the hydrophobic image increases,
As a result, when the reproduced recording material is reused for image formation such as copying or recording, the fixability of the formed image is adversely affected.

The image removal accelerating solution of the present invention may contain a small amount of an organic solvent in order to dissolve a surfactant which is hardly soluble in water. As such an organic solvent, a nonvolatile organic solvent is preferable. For example, ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol, 1,5-pentanediol, 2-methyl-2,
Polyhydric alcohols such as 4-pentanediol, propylene glycol, dipropylene glycol, glycerin, etc., ethylene glycol monoethyl ether, ethylene glycol monomethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, triethylene glycol monomethyl ether, tetraethylene glycol monomethyl ether Ethers of polyhydric alcohols such as propylene glycol monomethyl ether, diethylene glycol monoethyl ether, triethylene glycol monoethyl ether, tetraethylene glycol monoethyl ether, and propylene glycol monoethyl ether; N-methyl-2-pyrrolidone; -Heterocyclic such as dimethylimidazolidinone, ε-caprolactam Such compounds, and the like.

Further, by adding a preservative such as dehydroacetate, sorbate, benzoate and pentachlorophenol to the image removal accelerating solution of the present invention, the preservability of the image removal accelerating solution is improved. Is preferred.

Next, a method of reproducing a recording material using the above-described image removal accelerating liquid of the present invention will be described. The method for reproducing a recording material of the present invention comprises applying an image removal accelerating liquid to a recording material having a hydrophobic image formed of a thermoflexible or thermosoftening image forming substance, And contacting the film under heat and pressure, and transferring the hydrophobic image to the peeling member to thereby peel off the recording material, wherein the image removal accelerating liquid is solid at room temperature and has a melting point of 30 ° C. or more. A recording material reproducing method, which is an aqueous solution containing a water-soluble substance and a surfactant at 160 ° C.

According to this method of reproducing a recording material, an image removal accelerating liquid containing a surfactant in a high concentration and obtained by using a water-soluble substance having a melting point of 30 ° C. to 160 ° C. at room temperature is used. By applying a small amount, the hydrophobic image can be sufficiently peeled and removed from the recording material, and the reproduced recording material can be reproduced without occurrence of elongation, wrinkling, waving, curling, or the like. It can be carried out.
Further, according to the present invention, the amount of the surfactant remaining on the surface of the reproduced recording material by peeling off and removing the hydrophobic image becomes extremely small, and the reproduced recording material is copied or recorded. When it is reused for forming an image, an image having good fixability can be formed.

The amount of the image removal accelerating liquid applied to the recording material in the present invention is 0.05 to 0.5 g / A4 (A4
(The weight of the liquid contained in the printing paper) is preferable, and particularly preferably 0.1%.
1 to 0.4 g / A4 is preferred. When the applied amount of the image removal accelerating liquid is less than 0.05 g / A4, the peeling and removal of the hydrophobic image becomes insufficient, and when it exceeds 0.5 g / A4, it is generally used as a recording material. Paper, etc., causing wrinkles, waving, curling, etc., and the amount of surfactants remaining on the reproduced recording material increases, and the reproduced recording material is copied or recorded. When it is reused for forming an image, the fixability of the image is adversely affected.

To apply the image removal accelerating liquid to the recording material, for example, the image removing accelerating liquid is sprayed or applied to the hydrophobic image forming surface of the recording material, or the image removing accelerating liquid has a hydrophobic image. It may be applied by a method such as immersing the recording material.

Further, the image removal accelerating liquid containing the surfactant at a high concentration may be applied only once, or after the image removing accelerating liquid having a low surfactant concentration is applied to the recording material, After applying an image removal accelerating liquid containing a surfactant at a high concentration, or applying an image removal accelerating liquid containing a surfactant at a high concentration to a recording material, subsequently, the concentration of the surfactant is low. Such as applying an image removal accelerating liquid,
The image removal accelerating liquid may be applied plural times.

According to the method of applying an image removal accelerating liquid having a low concentration of a surfactant and then applying an image removal accelerating liquid containing a high concentration of a surfactant, the amount of the high concentration of the image removal accelerating liquid applied is reduced. Even if the amount is smaller, the hydrophobic image can be sufficiently separated and removed from the recording material, and the recording material can be reproduced without stretching, wrinkling, waving, curling, etc. of the recording material. it can. Further, surfactants remaining on the surface of the recording material reproduced by peeling off and removing the hydrophobic image, water-soluble substances which are solid at normal temperature and have a melting point of 30 ° C. to 160 ° C., and non-volatile organic solvents The amount becomes very small,
When the reproduced recording material is reused for image formation such as copying or recording, an image having good fixability can be formed without any influence on image formation.

When the low-concentration image removal accelerating liquid is applied after the application of the image-concentration accelerating liquid containing the surfactant at a high concentration, the amount of the high-concentration image removal accelerating liquid applied is as described above. More than in the case, when a low-concentration image removal accelerating liquid is applied, a surfactant remaining on the recording material by the application of the high-concentration image removal accelerating liquid,
A water-soluble substance which is solid at ordinary temperature and has a melting point of 30 ° C to 160 ° C,
Non-volatile organic solvents are absorbed by the low-concentration image removal accelerating liquid and are removed from the recording material, so if the reproduced recording material is reused for image formation such as copying and recording, An image having good fixability can be formed without any influence.

Further, when the image removal accelerating liquid containing a surfactant at a high concentration is applied only once, the surfactant remaining on the reproduced recording material is solid at room temperature and has a melting point. Water-soluble substances at 30 ° C. to 160 ° C., non-volatile organic solvents, etc. are used for post-treatment of reproduced recording materials containing water or alcohols such as methyl alcohol, ethyl alcohol, propyl alcohol, etc. with water as a main component. It can be removed by processing with a liquid, and when the recording material is reused for image formation such as copying or recording, an image with good fixability is formed without affecting the image formation at all. Can be. In this case, the applied amount of water or a post-treatment liquid containing water as a main component to the recording material is 0.08.
~ 0.3 g / A4 is preferred.

As the peeling member used in the method for reproducing a recording material of the present invention, a material exhibiting a certain degree of adhesiveness or heat resistance to a hydrophobic image is preferable. Examples of the material include isoprene rubber, neoprene rubber, Synthetic rubbers such as chloroprene rubber, silicone rubber, butadiene rubber, and fluoro rubber, natural rubber, epoxy resins such as bisphenol / epichlorohydrin condensate, alkyd resins, urea formaldehyde resin, butyl urea formaldehyde resin, butylated melamine formaldehyde resin, benzoguanamine formaldehyde Amino resins such as resins, phenolic thermosetting resins such as terpene phenol resins, phenol ether resins, and phenol resins, polyvinyl chloride, polyvinylidene chloride, and vinylidene chloride-acrylonitrile copolymer Vinyl chloride - vinyl acetate copolymer,
Ethylene-vinyl acetate copolymer, ethylene-tetrafluoroethylene copolymer, vinyl copolymers such as polyvinylidene fluoride, vinyl polymers such as polyvinyl butyral, polyvinyl formal, polypropylene, and polyethylene, polybutyl acrylate, polymethacrylic acid , Acrylic resin such as polymethyl methacrylate, polyimide, polyamide such as 6,6-nylon, 6-nylon, polycarbonate, polyether sulfone, polyether ether ketone, polyethylene terephthalate,
Polyethylene naphthalate, polyesters such as aromatic polyester, polyphenylene sulfide, polyparabalic acid, polyether nitrile, thermoplastic or thermosetting synthetic resins such as aramid, nickel, stainless steel, metals such as aluminum and oxides thereof,
Ceramic materials and the like can be mentioned.

These materials can be used alone, but they can also be used in combination by laminating, alloying, or adding other additives such as glass fiber, whisker, carbon, silica, and titanium oxide. Repeated use of the peeling member is advantageous in various points, such as lowering the recycling cost, and in that case, relatively high heat resistance and surface stability are required. Examples of particularly preferred release members from the image removal characteristics and durability, polyethylene terephthalate, polyethylene naphthalate, polyether ether ketone, polyphenylene sulfide,
Polyparabalic acid, polyether nitrile, aramid,
Examples include polyimide, polyetherimide, stainless steel, nickel, and alumite.

The recording material suitable for use in the method for reproducing a recording material of the present invention includes a recording material in which at least a hydrophobic image forming surface is formed of a layer which swells with water. As such a recording material, at least the hydrophobic image forming surface is formed of a paper-based layer mainly composed of cellulose fibers, and at least the hydrophobic image forming surface is mainly composed of a water-soluble polymer substance and has a crosslinked structure. And a recording material comprising a layer having the same. More specifically, commercially available paper such as general copy paper or recording paper containing cellulose fiber as a main component, a paper layer containing cellulose fiber as a main component or a water-soluble polymer on at least a hydrophobic image forming surface of a plastic film. Examples include a layer in which a substance is used as a main component and a layer having a crosslinked structure is stacked.

Examples of the water-soluble polymer having a cross-linked structure and forming a layer which swells with water include acrylic acid, methacrylic acid, vinyl alcohol, hydroxyethyl methacrylate, dihydroxypropyl methacrylate, acrylamide-2-methylpropanesulfonic acid, Acrylamide, methacrylamide, N, N-dimethylacrylamide, N-acrylylglycinamide, N-isopropylacrylamide, N, N-dimethylaminopropylacrylamide, vinylpyrrolidone, N, N-dimethylaminoethyl acrylate, N, N-dimethyl Examples include homopolymers, copolymers, and copolymers with substances other than the above, such as aminoethyl methacrylate, allylamine or salts thereof, quaternized amino groups, and polyethylene glycol. As a crosslinking agent for crosslinking these water-soluble polymer substances, an epoxy crosslinking agent, an isocyanate crosslinking agent, a radiation crosslinking agent, or the like can be used.

The hydrophobic image suitable for peeling and removing by the recording material reproducing method of the present invention includes ordinary electrophotographic methods, thermal transfer methods, ink jet methods using hot melt inks, and printing methods. And a hydrophobic image formed by using a heat-flexible or thermo-softening image formed product (dry toner or wet toner for developing an electrostatic latent image, hot-melt ink sheet, hot-melt ink, etc.).

When the image removal accelerating liquid is applied to a recording material having a hydrophobic image as described above, for example, an image is removed at the interface between the recording material, which is a paper material layer mainly containing cellulose fibers, and the hydrophobic image. The accelerating liquid permeates and the cellulose fibers swell and deform with water. This reduces the contact area and contact area between the cellulose fiber and the hydrophobic image and reduces the adhesive force between the hydrophobic image and the recording material, so that the hydrophobic image is easily peeled off from the recording material, The hydrophobic image can be peeled off from the recording material by bringing the hydrophobic image into contact with the peeling member under heat and pressure and transferring the hydrophobic image to the peeling member.

A recording material having a hydrophobic image which is particularly suitable for reproduction by the method for reproducing a recording material of the present invention as described above has a hydrophobic image formed using toner by electrophotography. It is a recording material.

As is conventionally known, the toner is mainly composed of a resin component, a colorant, a polarity controlling agent and the like.

The resin component includes, for example, styrene resin, acrylic resin, methacrylic resin, styrene-acrylic copolymer resin, styrene-butylacrylic copolymer resin, styrene-methacrylic copolymer resin, styrene -It is made of a thermoplastic resin or a thermosetting resin of a butadiene copolymer resin, a polyester resin or an epoxy resin, or a mixture of two or more of these resins. These resins have a glass transition point of 55 to 70 ° C. and a softening point of 8
It is 0 to 140 ° C. and generally shows hydrophobicity insoluble in water.

As the colorant, various pigments and dyes are used. For example, as a black colorant, carbon black, copper oxide, manganese dioxide, aniline black, activated carbon, ferrite, magnetite, etc., and as a yellow colorant, cadmium yellow, Graphite, zinc yellow, mineral fast yellow, navel yellow, banza yellow G, banza yellow 10G, quinoline yellow lake, yellow iron oxide, nickel titanium yellow, naphthol yellow S,
Benzidine Yellow G, Benzidine Yellow GR, Permanent Yellow NCG, Tartrazine Lake, etc., as red colorants, red lead, molybdenum orange, permanent orange GTR, pyrazolo orange, balkan orange, indanthrene brilliant orange RK,
Benzidine Orange G, Indanthrene Brilliant Orange GK, Bengala, Cadmium Red, Lead Red, Permanent Red 4R, Risor Red, Pyrazolone Red, Watching Red, Lake Red C, Lake Red D, Brilliant Carmine 6B, Eosin Lake, Rhodamine Lake B , Alizarin Lake, Brilliant Carmine 3B, Vulcan Fast Orange GG, Permanent Red F4RH, Permanent Carmine FB, etc.
As the blue colorant, navy blue, cobalt blue, alkali blue lake, Victoria blue lake, phthalocyanine blue and the like are used.

The polarity control material includes a positive charge control agent and a negative charge control agent. The positive charge control agents include nigrosine base EX, quaternary ammonium salts, polyamine compounds, imidazole compounds, and negative charge control agents. Chromium complex salt type azo dye, copper phthalocyanine dye,
Chromium complex salts, zinc complex salts, aluminum complex salts, calixarene compounds and the like are known.

When the hydrophobic image formed by the toner is peeled off from the recording material using the image removal accelerating liquid of the present invention, a small amount of the image removal accelerating liquid is applied to convert the hydrophobic image from the recording material. The recording material can be sufficiently peeled and removed, and does not cause elongation, wrinkling, waving, curling, or the like on the recording material. In addition, when a toner image is formed again by copying or recording using the reproduced recording material, the toner image has good fixability, and the same quality of toner as when a new unused recording material is used. Images can be obtained.

Next, an example of an apparatus used in the method for reproducing a recording material of the present invention will be described with reference to the drawings. FIG. 1 is a schematic sectional view showing an example of a recording material reproducing apparatus. FIG.
The recording material having a hydrophobic image formed of a thermo-flexible or thermo-softening image forming material is supplied from a paper feed tray 1 to a guide plate 3, an application roller 7, and a transport roller 8 by a paper feed roller 2. Sent. The image removal accelerating liquid 5 containing a surfactant at a low concentration in the liquid container 4 is pumped up by a pumping roller 6 and applied to a hydrophobic image forming surface of the recording material by an application roller 7. Next, the recording material is sent to the application roller 12 and the conveyance roller 13,
An image removal accelerating liquid 10 containing a surfactant at a high concentration is applied by a pumping roller 11 and an application roller 12 to the surface of the recording material to which the low concentration image removal accelerating liquid has been applied.

The recording material to which the image removal accelerating liquid has been applied is
A contact roller 14; a plurality of heating rollers 18 and a rotator 19 which are in continuous contact and arranged in a zigzag form; a belt-like peeling member 16 which rotates in contact with the separating roller 23 and which rotates; and a contact roller 15 The hydrophobic image is transferred to the peeling member while being sandwiched and conveyed between the heating roller 18, the rotating body 19, and the belt-like peeling member 17 that rotates in contact with the separating roller 22 and rotates. You.

The recording material having a hydrophobic image is conveyed while being tightly sandwiched between the belt-like peeling member 17 and the belt-like peeling member 16 and wound around the plurality of heating rollers 18 and the rotating body 19. Is naturally pressed by the tension of the belt-shaped peeling member,
8 to transfer the hydrophobic image to the release member. In addition, heating can also be performed by heating the atmosphere using the heaters 20 and 21. The recording material on which the hydrophobic image has been transferred to the peeling member and the belt-like peeling member 17 are separated by separation rollers 22 and 23, and the separation claws 24 and 2 are separated.
5 completely separates. The belt-like peeling member 17 to which the hydrophobic image has adhered by transfer is the cleaning blade 2
6 and is used again for peeling off the hydrophobic image.

The hydrophobic image forming substance peeled from the peeling member by the cleaning is accumulated in the container 27. on the other hand,
The surface of the recording material separated by the separation rollers 22 and 23 and the separation claws 24 and 25 no longer has a hydrophobic image. The recording material reproduced in this way is conveyed to the post-processing unit by the conveyance roller 28, and the post-processing liquid 30 in the post-processing liquid container 29 is regenerated by the pumping roller 31 and the application roller 32. Is given to
As a result, water-soluble substances, surfactants, nonvolatile organic solvents, etc., which are solid at room temperature and have a melting point of 30 ° C. to 160 ° C., are removed from the surface of the recording material. You. Next, the recording material is dried by a conveying roller 33 and, if necessary, by a drying belt 34 (normally, there is no need to dry the recording material).
6 is discharged. In this way, the hydrophobic image is sufficiently peeled and removed, and there is no elongation, wrinkling, waving, curling, or the like, and a recorded image capable of forming an image having good fixability when used again for copying or recording. The wood is regenerated.

[0038]

According to the present invention, by using a water-soluble substance which is solid at room temperature and has a melting point of 30 ° C. to 160 ° C., an image removal accelerating liquid comprising an aqueous solution containing a surfactant in a high concentration can be obtained. The image removal accelerating liquid can be applied to a recording material having a hydrophobic image formed of a thermo-flexible or thermo-softening image forming substance, and the hydrophobic image and the peeling member are heated and pressed under heat and pressure. By contacting and transferring the hydrophobic image to a peeling member and peeling off the recording material, the hydrophobic image is sufficiently peeled and removed, and the recording material without stretching, wrinkling, waving, curling, etc. is reproduced. can do. Solid at normal temperature, melting point 30 ~ 160 ℃
By using this water-soluble substance, the water-soluble substance is first dissolved in water, and a surfactant, for example, a sulfo-succinic acid, which is excellent in removing and peeling off a hydrophobic image formed particularly on a recording material, is added to the aqueous solution. When the surfactant, which is a compound having an acid alkyl ester structure, is dissolved, the surfactant is dissolved in the water-soluble substance and water, so that the surfactant is dissolved and contained at a very high concentration. An image removal accelerating liquid can be obtained.

When the image removal accelerating liquid containing the surfactant dissolved at a high concentration is applied to a recording material having a hydrophobic image formed of a thermoflexible or thermosoftening image forming substance, Since the concentration of the activator is high and there is a water-soluble substance having a melting point of 30 ° C. to 160 ° C. which is solid at room temperature, the image removal accelerating liquid does not penetrate much inside the recording material, and the image of the hydrophobic image The image removal accelerating liquid adheres to the surface of a so-called solid image having a large image area as well as a so-called fine character image having a small area. When the release member is brought into close contact with the hydrophobic image surface of the recording material in such a state and heated and pressed,
A water-soluble substance having a melting point of 30 ° C. to 160 ° C. which is solid at room temperature is melted to become a liquid, which dissolves a surfactant, and the melted solution penetrates from the surface of the hydrophobic image to form a hydrophobic image. The image removal accelerating liquid reaches the interface between the sheet and the recording material. As a result, the adhesive force between the hydrophobic image and the recording material is weakened, and the hydrophobic image is easily transferred to the peeling member,
It is sufficiently peeled from the recording material.

The image removing accelerating liquid of the present invention, which acts as described above, can sufficiently remove and peel off the hydrophobic image from the recording material by applying a small amount to the recording material having the hydrophobic image. Since the amount of moisture imparted to the material can be reduced, it is possible to reproduce a recording material free from elongation, wrinkling, waving, curling, and the like. In addition, when the reproduced recording material after the hydrophobic image is peeled off and cooled is cooled to room temperature, a water-soluble substance having a melting point of 30 ° C. to 160 ° C., which is solid at room temperature and remains on the surface of the reproduced recording material, The recording material is solidified to form a so-called dry state, whereby the occurrence of elongation, wrinkling, waving, curling, and the like in the reproduced recording material can be suppressed.

Further, the reproduced recording material obtained in a dry state can be immediately reused for image formation such as copying and recording. Further, according to the present invention, when the amount of the surfactant remaining on the surface of the reproduced recording material is extremely small, and the reproduced recording material is reused for image formation such as copying or recording, Thus, an image having good fixability can be formed.

Incidentally, it is solid at normal temperature and has a melting point of 30 ° C. to 16 ° C.
If the water-soluble substance or surfactant at 0 ° C. imparts conductivity to the reproduced recording material or adversely affects the fixability of an image formed on the reproduced recording material, the reproduction is performed. The water-soluble substance and the surfactant can be easily removed by treating the recording material with water or a post-treatment liquid containing water as a main component. As a result, when the reproduced recording material is reused for forming an image by copying or recording, the image transfer is good as in the case of using new copy paper or recording paper, and the hydrophobic property with good fixability. An image can be formed on a recording material.

It is solid at ordinary temperature and has a melting point of 30 ° C. to 16 ° C.
As the water-soluble substance at 0 ° C, particularly, the melting point is about 40 ° C to 1 ° C.
Compounds at 50 ° C. are preferred. If the melting point is lower than 30 ° C., after removing the hydrophobic image from the recording material, a part of the water-soluble substance will remain as a liquid on the surface and inside of the reproduced recording material. In particular, the water-soluble substance that permeates and remains inside the reproduced recording material cannot be sufficiently removed by treating the reproduced recording material with water or the like, and the reproduced recording material is copied. When it is reused for image formation such as printing or recording, the transfer charge to the recording material becomes insufficient, so-called image riding is deteriorated, or the fixability of a hydrophobic image to the recording material is deteriorated. Will occur. When the melting point exceeds 160 ° C., the heating temperature range (usually 80 to 80) in the operation of peeling and removing the hydrophobic image from the recording material.
In the range of about 130 ° C.), the water-soluble substance does not melt and remains in a solid state even if there is a freezing point depressing action in the mixture, so that a molten solution with a surfactant cannot be formed, and It is difficult to make the removal accelerating liquid permeate the interface between the hydrophobic image and the recording material.

[0044]

EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited thereto.

Example 1 1,6-hexanediol was dissolved in water, and then a dialkyl sulfosuccinate salt surfactant (Aerosol OT-100, manufactured by Mitsui Cytec) and perfluorooctanoic acid were added to the solution. And agitated to dissolve the dialkyl sulfosuccinate salt surfactant (trade name: Aerosol OT-100, manufactured by Mitsui Cytec) 45% by weight, perfluorooctanoic acid 2.5% by weight and 1,6-hexane An image removal accelerating liquid comprising an aqueous solution containing 20% by weight of a diol was prepared. Then, an electrophotographic copying machine (RICOPY FT-6)
500, manufactured by Ricoh Co., Ltd.) on the toner image forming surface of a PPC copy sheet having a toner image formed thereon, using the reproducing apparatus shown in FIG.
(Per four sides). In the playback device shown in FIG.
A belt made of polyetheretherketone was used as the belt-like peeling member 17, and the temperature of the heating roller A was 139 ° C.
The temperature of the heating roller B was set to 94 ° C., and the temperatures of the heating rollers C, D and E were set to 86 ° C., and the PPC copy paper to which the image removal accelerating liquid was applied was belt-like peeling member 16 and belt-like peeling member 17. , And conveyed at a speed of 51 mm / sec.
5, the PPC copy paper was separated from the belt-shaped peeling member 17, and the post-treatment was performed by applying 0.1 g (per A4 surface) of a post-treatment liquid using water by the application roller 32. The sheet was transferred to the member and peeled off from the PPC copy sheet, and a plain PPC copy sheet free of paper elongation, wrinkles, waving, curling and the like was obtained. An electrophotographic copier (RICOP) using recycled PPC copying paper
YFT-6500 (manufactured by Ricoh Co., Ltd.), a toner image was formed again. As a result, a toner image having good fixability was obtained as in the case of using new unused PPC copy paper. Using a regenerated PPC copy sheet, a toner image was formed with the above-described electrophotographic copying machine, and then the operation of applying the above-described image removal accelerating liquid and again removing and removing the toner image was repeated five times. The toner image is always sufficiently removed, the plain PPC copy paper free of paper elongation, wrinkles, waving, curling, etc. is reproduced, and the same quality toner image as when a new unused copy paper is used. was gotten.

Comparative Example 1 In Example 1, aerosol OT- was used without using 1,6-hexanediol and perfluorooctanoic acid.
When only 100 was dissolved maximally in water to prepare an image removal accelerating solution, the content of the aerosol OT-100 was about 2% by weight. When the PPC copy paper was regenerated in the same manner as in Example 1 using this image removal accelerating liquid, the peeling and removal of the toner image was not sufficiently performed, and the toner image remained.

Embodiment 2 A PP having a toner image using the reproducing apparatus shown in FIG.
0.10 g of water only on the toner image forming surface of C copy paper
(Per A4 surface), then peeling and removing the toner image in the same manner as in Example 1 except that 0.20 g (per A4 surface) of the image removal accelerating liquid prepared as in Example 1 was applied. As a result of the processing, the toner image on the PPC copy paper was transferred to a peeling member and peeled off from the PPC copy paper to obtain a plain PPC copy paper free of paper elongation, wrinkles, waving, curling, and the like. An electrophotographic copier (RICOP) using recycled PPC copying paper
YFT-6500 (manufactured by Ricoh Co., Ltd.), a toner image was formed again. As a result, a toner image having good fixability was obtained as in the case of using new unused PPC copy paper. Further, after forming a toner image with the electrophotographic copying machine using the regenerated PPC copying paper, the operation of applying the image removal accelerating liquid in the same manner as described above and peeling and removing the toner image again is repeated five times. When the test was performed, the toner image was always sufficiently removed, the plain PPC copy paper without paper stretching, wrinkles, waving, curl, etc. was reproduced, and the same quality as when using a new unused copy paper was used. Was obtained.

Embodiment 3 Using the reproducing apparatus shown in FIG. 1, a PP having a toner image
Except that 0.25 g (per A4 surface) of the image removal accelerating liquid prepared in the same manner as in Example 1 was applied to the toner image forming surface of C copy paper, and then 0.15 g (per A4 surface) of water alone was applied. Performed peeling and removal of the toner image in the same manner as in Example 1 (however, no post-processing was performed). However, the toner image of the PPC copy paper was transferred to a release member, peeled and removed from the PPC copy paper, and the paper stretched. A plain PPC copy sheet free of wrinkles, wrinkles, curls and the like was obtained. When a toner image was formed again using an electrophotographic copying machine (RICOPY FT-6500, manufactured by Ricoh Co., Ltd.) using the regenerated PPC copying paper, the fixability was good as in the case of using new unused PPC copying paper. A good toner image was obtained. Further, after forming a toner image with the electrophotographic copying machine using the regenerated PPC copying paper, the operation of applying the image removal accelerating liquid in the same manner as described above and peeling and removing the toner image again is repeated five times. When the test was performed, the toner image was always sufficiently removed, the plain PPC copy paper without paper stretching, wrinkles, waving, curl, etc. was reproduced, and the same quality as when using a new unused copy paper was used. Was obtained.

Example 4 Glycolic acid and 1,6-hexanediol were dissolved in water, and a dialkyl sulfosuccinate salt surfactant (Aerosol OT-100, manufactured by Mitsui Cytec Co., Ltd.) was added to the solution and stirred. 25% by weight of a dialkyl sulfosuccinate salt surfactant (Aerosol OT-100, manufactured by Mitsui Cytec Co., Ltd.)
An image removal accelerating liquid comprising an aqueous solution containing 38% by weight of glycolic acid and 12% by weight of 1,6-hexanediol was prepared. Then, an electrophotographic copier (RICOPY)
FT-2200 (manufactured by Ricoh Co., Ltd.), the above-mentioned image removal accelerating liquid was applied to a toner image forming surface of a PPC copy sheet having a toner image by using a reproducing apparatus shown in FIG.
0 g (per A4 face) was applied. In the reproducing apparatus shown in FIG. 1, a belt made of polyetheretherketone was used for the belt-like peeling member 17, and the temperature of the heating roller A was set to 1
The temperature of the heating rollers B, C, D, and E was set to 93 ° C., and the PPC copy paper to which the image removal accelerating liquid was applied was sandwiched between the belt-like peeling member 16 and the belt-like peeling member 17. The PPC copy paper is separated from the belt-shaped peeling member 17 by the separation rollers 22 and 23 and the separation claws 24 and 25, and the post-treatment liquid using water is reduced to 0 by the application roller 32. .1 g (per A4 surface) and post-processed, the toner image was transferred to a peeling member and peeled off from the PPC copy paper, and plain PPC free of paper elongation, wrinkling, waving, curling, etc. Copy paper was obtained. An electrophotographic copying machine (RICOPY FT-22) is used by using the regenerated PPC copying paper.
00, manufactured by Ricoh Co., Ltd.), a toner image having good fixability was obtained as in the case of using new unused PPC copy paper. Using a regenerated PPC copy sheet, a toner image was formed with the above-described electrophotographic copying machine, and then the operation of applying the above-described image removal accelerating liquid and again removing and removing the toner image was repeated five times. The toner image is always sufficiently removed, the plain PPC copy paper free of paper elongation, wrinkles, waving, curling, etc. is reproduced, and the same quality toner image as when a new unused copy paper is used. was gotten.

Embodiment 5 Using the reproducing apparatus shown in FIG. 1, a PP having a toner image
0.10 g of water only on the toner image forming surface of C copy paper
(Per A4 surface) and then peeling and removing the toner image in the same manner as in Example 4 except that 0.20 g (per A4 surface) of the image removal accelerating liquid prepared in the same manner as in Example 4 was applied. As a result of the processing, the toner image on the PPC copy paper was transferred to a peeling member and peeled off from the PPC copy paper to obtain a plain PPC copy paper free of paper elongation, wrinkles, waving, curling, and the like. An electrophotographic copier (RICOP) using recycled PPC copying paper
(YFT-2200, manufactured by Ricoh Co., Ltd.) to form a toner image again. As a result, a toner image having good fixability was obtained as in the case of using new unused PPC copy paper. Further, after forming a toner image with the electrophotographic copying machine using the regenerated PPC copying paper, the operation of applying the image removal accelerating liquid in the same manner as described above and peeling and removing the toner image again is repeated five times. When the test was performed, the toner image was always sufficiently removed, the plain PPC copy paper without paper stretching, wrinkles, waving, curl, etc. was reproduced, and the same quality as when using a new unused copy paper was used. Was obtained.

Embodiment 6 Using the reproducing apparatus shown in FIG. 1, a PP having a toner image
Except that 0.30 g (per A4 surface) of the image removal accelerating liquid prepared in the same manner as in Example 4 was applied to the toner image forming surface of the C copy paper, and then 0.15 g (per A4 surface) of water alone was applied. Performed peeling and removal of the toner image in the same manner as in Example 4 (however, no post-processing was performed). However, the toner image of the PPC copy paper was transferred to a peeling member, peeled and removed from the PPC copy paper, and the paper stretched. A plain PPC copy sheet free of wrinkles, wrinkles, curls and the like was obtained. When a toner image was formed again using an electrophotographic copying machine (RICOPY FT-2200, manufactured by Ricoh Co., Ltd.) using the regenerated PPC copying paper, the fixability was good as in the case of using a new unused PPC copying paper. A good toner image was obtained. Further, after forming a toner image with the electrophotographic copying machine using the regenerated PPC copying paper, the operation of applying the image removal accelerating liquid in the same manner as described above and peeling and removing the toner image again is repeated five times. When the test was performed, the toner image was always sufficiently removed, the plain PPC copy paper without paper stretching, wrinkles, waving, curl, etc. was reproduced, and the same quality as when using a new unused copy paper was used. Was obtained.

Example 7 Glycolic acid and 2-methyl-2,4-pentanediol were dissolved in water, and a dialkyl sulfosuccinate salt surfactant (trade name: Aerosol OT) was added to the solution.
-100, manufactured by Mitsui Cytec Co., Ltd.), stirred and dissolved, and 35% by weight of a dialkyl sulfosuccinate ester surfactant (trade name: Aerosol OT-100, manufactured by Mitsui Cytec Co., Ltd.), 20% by weight of glycolic acid, and 2-methyl An image removal accelerating liquid comprising an aqueous solution containing 5% by weight of -2,4-pentanediol was prepared. The above-mentioned image removal promoting liquid was used in place of the image removal promoting liquid in Example 4, the applied amount of the image removal promoting liquid was 0.30 g (per A4 surface), and the PPC copy to which the image removal promoting liquid was applied in the reproducing apparatus. The toner image of the PPC copy paper was transferred to a peeling member and peeled from the PPC copy paper when the peeling and removal of the toner image and the post-processing were performed in the same manner as in Example 4 except that the paper conveyance speed was set to 24 mm / sec. A plain PPC copy sheet free of paper elongation, wrinkles, waving, curling and the like was obtained. An electrophotographic copier (RICOPY FT-2) is used by using the regenerated PPC copy paper.
200 (manufactured by Ricoh Co., Ltd.), a toner image having good fixability was obtained as in the case of using new unused PPC copy paper. Further, after forming a toner image with the electrophotographic copying machine using the regenerated PPC copying paper, the operation of applying the image removal accelerating liquid in the same manner as described above and peeling and removing the toner image again is repeated five times. When the test was performed, the toner image was always sufficiently removed, the plain PPC copy paper without paper stretching, wrinkles, waving, curl, etc. was reproduced, and the same quality as when using a new unused copy paper was used. Was obtained.

Embodiment 8 Using the reproducing apparatus shown in FIG. 1, a PP having a toner image
0.10 g of water only on the toner image forming surface of C copy paper
(Per A4 surface), and then 0.20 g (per A4 surface) of the image removal accelerating liquid prepared in the same manner as in Example 7 was applied. Example 4 except that it was set to 24 mm / sec.
When the peeling removal and post-processing of the toner image were performed in the same manner as described above, the toner image of the PPC copy paper was transferred to a peeling member and peeled and removed from the PPC copy paper, and the paper stretched.
A plain PPC copy sheet free of wrinkles, undulations and curls was obtained. When a toner image was formed again using an electrophotographic copying machine (RICOPY FT-2200, manufactured by Ricoh Co., Ltd.) using the regenerated PPC copying paper, the fixability was good as in the case of using a new unused PPC copying paper. A good toner image was obtained. Also, the reproduced PPC
After forming a toner image with the above-described electrophotographic copying machine using the copy paper, the operation of applying the image removal accelerating liquid in the same manner as described above and peeling and removing the toner image again was repeated five times. Solid PPC from which image is sufficiently removed and no paper stretching, wrinkling, waving, curling, etc.
The copy sheet was reproduced, and a toner image of the same quality as that obtained when a new unused copy sheet was used was obtained.

Embodiment 9 Using the reproduction apparatus shown in FIG. 1, a PP having a toner image
0.25 g (per A4 surface) of the image removal accelerating liquid prepared in the same manner as in Example 7 was applied to the toner image forming surface of the C copy paper, and then 0.15 g (per A4 surface) of water alone was applied. Example 4 except that the conveyance speed of the PPC copy paper to which the image removal accelerating liquid was applied was set to 24 mm / sec.
The toner image of the PPC copy paper was transferred to a release member and peeled and removed from the PPC copy paper, and the paper was stretched, wrinkled, and wavy. A plain PPC copy sheet free of curl and the like was obtained. An electrophotographic copying machine (RICOPY FT-
2200, manufactured by Ricoh Co., Ltd.), a toner image having good fixability was obtained as in the case of using new unused PPC copy paper. Also,
Using the regenerated PPC copy paper, a toner image was formed by the above-described electrophotographic copying machine, and an operation of applying an image removal accelerating liquid in the same manner as described above and peeling and removing the toner image again was repeated five times. However, the toner image is always sufficiently removed, plain PPC copy paper free of paper elongation, wrinkles, waving, curl, etc. is reproduced, and toner of the same quality as when using a new unused copy paper is used. An image was obtained.

Example 10 Glycolic acid and α-methyladipic acid were dissolved in water, and a dialkyl sulfosuccinate ester surfactant (trade name: Aerosol OT-100, manufactured by Mitsui Cytec) was added to the solution, followed by stirring. After dissolving, 30% by weight of a dialkyl sulfosuccinate salt surfactant (trade name: Aerosol OT-100, manufactured by Mitsui Cytec), 30% by weight of glycolic acid, and α-methyladipic acid 15
An image removal accelerating liquid consisting of an aqueous solution containing the weight% was prepared. Then, an electrophotographic copying machine (RICOPY FT-
2200, manufactured by Ricoh Co., Ltd.) on the toner image forming surface of a PPC copy sheet having a toner image formed thereon by the use of the reproducing apparatus shown in FIG.
(Per A4 surface). In the reproducing apparatus shown in FIG. 1, a belt made of polyetheretherketone was used for the belt-shaped peeling member 17, and the temperature of the heating roller A was set to 130.
° C, the temperature of the heating roller B is 95 ° C, and the heating rollers C, D,
The temperature of E was set to 90 ° C., and the PPC copy sheet to which the image removal accelerating liquid was applied was sandwiched between the belt-shaped stripping member 16 and the belt-shaped stripping member 17 and was conveyed at a speed of 35 mm / sec. Separating rollers 22, 23 and separating claw 2
4 and 25, the PPC copy paper is removed from the belt-like peeling member 17.
The toner image is transferred to a peeling member and peeled off from the PPC copy paper when the post-treatment is performed by applying 0.1 g (per A4 surface) of a post-treatment liquid using water by the application roller 32. As a result, a plain PPC copy sheet free of paper elongation, wrinkles, waving, curling and the like was obtained. An electrophotographic copier (RI) using recycled PPC copying paper
When the toner image was formed again by COPY FT-2200 (manufactured by Ricoh Co., Ltd.), a toner image having good fixability was obtained as in the case of using new unused PPC copy paper. Also, using the reproduced PPC copy paper,
After forming the toner image with the above-mentioned electrophotographic copying machine, the operation of applying the image removal accelerating liquid in the same manner as above and performing the peeling and removing of the toner image again and again was repeated five times, and the toner image was always sufficiently removed. , Paper stretch, wrinkles, wavy,
A plain PPC copy sheet without curl or the like was reproduced, and a toner image of the same quality as when a new unused copy sheet was used was obtained.

Example 11 Glycolic acid and isopropyl malonic acid were dissolved in water, and then a dialkyl sulfosuccinate ester surfactant (trade name: Aerosol OT-100, manufactured by Mitsui Cytec Co., Ltd.) was added to the solution, followed by stirring to dissolve. 35% by weight of dialkyl sulfosuccinate salt surfactant (trade name: Aerosol OT-100, manufactured by Mitsui Cytec), 25% by weight of glycolic acid and 20% of isopropyl malonic acid
An image removal accelerating liquid consisting of an aqueous solution containing the weight% was prepared. The above-mentioned image removal accelerating liquid was used in place of the image removal accelerating liquid in Example 10, and the applied amount of the image removal accelerating liquid was 0.1%.
30 g (per A4 surface), and the conveying speed of the PPC copy sheet to which the image removal accelerating liquid is applied in the reproducing apparatus is 30 m.
The toner image was peeled and removed and post-processed in the same manner as in Example 10 except that m / sec was used.
The toner image on the copy sheet was transferred to a peeling member and peeled off from the PPC copy sheet to obtain a plain PPC copy sheet free of paper elongation, wrinkles, waving, curling and the like. An electrophotographic copier (RI) using recycled PPC copying paper
When the toner image was formed again by COPY FT-2200 (manufactured by Ricoh Co., Ltd.), a toner image having good fixability was obtained as in the case of using new unused PPC copy paper. Also, using the reproduced PPC copy paper,
After forming the toner image with the above-mentioned electrophotographic copying machine, the operation of applying the image removal accelerating liquid in the same manner as above and performing the peeling and removing of the toner image again and again was repeated five times, and the toner image was always sufficiently removed. , Paper stretch, wrinkles, wavy,
A plain PPC copy sheet without curl or the like was reproduced, and a toner image of the same quality as when a new unused copy sheet was used was obtained.

Example 12 1,6-hexanediol and diacetamide were dissolved in water, and a dialkyl sulfosuccinate salt surfactant (trade name: Aerosol OT-100, trade name) was added to this solution.
Mitsui Cytec Co., Ltd.) was added and stirred to dissolve. Dialkyl sulfosuccinate salt surfactant (Aerosol OT-100, manufactured by Mitsui Cytec Co., Ltd.) 40% by weight, 1,6-hexanediol 10% by weight, and diacetamide An image removal accelerating liquid comprising an aqueous solution containing 25% by weight was prepared. The PPC copy to which the image removal accelerating liquid was applied in the reproducing apparatus by using the image removal accelerating liquid in place of the image removal accelerating liquid in Example 10, setting the applied amount of the image removal accelerating liquid to 0.30 g (per A4 surface). When peeling and removal of the toner image and post-processing were performed in the same manner as in Example 10 except that the paper conveyance speed was set to 30 mm / sec, the toner image of the PPC copy paper was transferred to the peeling member and peeled from the PPC copy paper. Removed, paper stretch, wrinkles,
A plain PPC copy sheet free of occurrence of waving, curling, etc. was obtained. An electrophotographic copying machine (RICOPY FT-2200, manufactured by Ricoh Co., Ltd.) using recycled PPC copying paper
As a result, a toner image having good fixability was obtained as in the case of using new unused PPC copy paper. Further, after forming a toner image with the electrophotographic copying machine using the regenerated PPC copying paper, the operation of applying the image removal accelerating liquid in the same manner as described above and peeling and removing the toner image again is repeated five times. When the test was performed, the toner image was always sufficiently removed, the plain PPC copy paper without paper stretching, wrinkles, waving, curl, etc. was reproduced, and the same quality as when using a new unused copy paper was used. Was obtained.

Example 13 1,6-hexanediol and hexamethylenediamine were dissolved in water, and a dialkyl sulfosuccinate salt surfactant (trade name: Aerosol OT-
100, manufactured by Mitsui Cytec Co., Ltd.), stirred and dissolved, and a dialkyl sulfosuccinate ester surfactant (trade name: Aerosol OT-100, manufactured by Mitsui Cytec Co., Ltd.) 40% by weight, 1,6-hexanediol 10% by weight
And an aqueous solution containing 35% by weight of hexamethylenediamine was prepared. Then, the above-described image removal accelerating liquid was applied to the toner image forming surface of a PPC copy sheet having a toner image formed by an electrophotographic copying machine (RICOPY FT-2200, manufactured by Ricoh Co., Ltd.) using a reproducing apparatus shown in FIG. .40 g (per A4 face). In the reproducing apparatus shown in FIG. 1, a belt made of polyetheretherketone is used as the belt-shaped peeling member 17, the temperature of the heating roller A is set to 125 ° C., the temperature of the heating roller B is set to 95 ° C., and the heating rollers C, D, and E are used. Is set to 90 ° C., and the PPC copy sheet to which the image removal accelerating liquid is applied is sandwiched between the belt-like member 16 and the belt-like peeling member 17 and transported at a speed of 51 mm / sec. The PPC copy sheet is separated from the belt-like peeling member 17 by the separation rollers 22 and 23 and the separation claws 24 and 25,
When a post-treatment was performed by applying 0.1 g (per A4 surface) of a post-treatment liquid using water, the toner image was transferred to a peeling member and peeled off from the PPC copy paper.
Plain P without paper stretch, wrinkles, waving, curl, etc.
PC copy paper was obtained. An electrophotographic copier (RICOPY FT-220) is used by using the regenerated PPC copy paper.
0, manufactured by Ricoh Co., Ltd.), a toner image having good fixability was obtained as in the case of using new unused PPC copy paper. Further, after forming a toner image with the electrophotographic copying machine using the regenerated PPC copying paper, the operation of applying the image removal accelerating liquid in the same manner as described above and peeling and removing the toner image again is repeated five times. When the test was performed, the toner image was always sufficiently removed, the plain PPC copy paper without paper stretching, wrinkles, waving, curl, etc. was reproduced, and the same quality as when using a new unused copy paper was used. Was obtained.

[0059]

According to the present invention, a hydrophobic image can be sufficiently peeled off from a recording material having a hydrophobic image formed by a thermoflexible or thermosoftening image forming substance by using a small amount thereof. Can be extended to the reproduced recording material,
An image removal accelerating liquid that does not generate wrinkles, waving, curling, or the like can be obtained. Further, according to the present invention, a hydrophobic image is sufficiently peeled off from a recording material having a hydrophobic image formed of a thermo-flexible or thermo-softening image-forming substance, and is stretched, wrinkled, wavy or curled. Therefore, it is possible to reproduce a recording material suitable for reuse in image formation such as copying or recording.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an example of a reproducing apparatus used for a method of reproducing a recording material according to the present invention.

[Explanation of symbols]

 5 Image Removal Acceleration Liquid 6 Pumping Roller 7 Application Roller 10 Image Removal Acceleration Liquid 12 Application Roller 14 Adhesion Roller 15 Adhesion Roller 16 Belt-like Release Member 17 Belt-like Release Member 18 Heating Roller 19 Rotating Body 22 Separation Roller 24 Separation Claw 30 Post-treatment liquid 31 Pumping roller 32 Coating roller

Claims (8)

[Claims] 1. Solid at normal temperature, melting point of 30 ° C. to 160 ° C.
An image removal accelerating liquid comprising an aqueous solution containing a water-soluble substance and a surfactant. 2. The image removal accelerating liquid according to claim 1, wherein the surfactant has a sulfosuccinic acid alkyl ester structure. 3. Solid at normal temperature, melting point of 30 ° C. to 160 ° C.
3. The image removal accelerating liquid according to claim 1, wherein the content of the water-soluble substance is 1 to 60% by weight. 4. A surfactant content of 10% by weight to 7% by weight.
The amount is 0% by weight.
The image removal accelerating liquid according to the above. 5. An image removal accelerating liquid is applied to a recording material having a hydrophobic image formed of a heat-flexible or heat-softening image forming substance, and the hydrophobic image and the peeling member are heated and heated.
In a method for reproducing a recording material, in which a hydrophobic image is transferred to a release member by peeling off the recording material by contacting the recording material under pressure, the image removal accelerating liquid is solid at room temperature and has a melting point of 30.
A method for reproducing a recording material, wherein the recording material is an aqueous solution containing a water-soluble substance and a surfactant at a temperature of from 160C to 160C. 6. The method according to claim 5, wherein the surfactant has a sulfosuccinic acid alkyl ester structure. 7. Solid at normal temperature, melting point of 30 ° C. to 160 ° C.
7. The method for reproducing a recording material according to claim 5, wherein the content of the water-soluble substance is 1% by weight to 60% by weight. 8. A surfactant content of 10% by weight to 7% by weight.
8. The composition according to claim 5, wherein the amount is 0% by weight.
The method for reproducing the recording material according to the above.