JP2003005435A - Recording material and method and device for removing image forming material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording material which is formed by using plain paper having high versatility and of which the image forming materials can be easily peeled by a peeling liquid essentially consisting of an aqueous solvent and a method and device for removing the image forming materials. SOLUTION: The recording material characterized in that the image forming material films distributed with the water absorptive microregions to a sea-and- island state is formed in the image forming material films, the method of removing the image forming materials comprising supplying the aqueous peeling liquid to the image forming material films distributed to the sea-and-island state in the image forming materials and removing the image forming materials from an image holding body by weakening its adhesive strength and the device of removing the image forming materials which bonds the peeling member to the image forming materials on the image holding body and removes the image forming material from the image holding body by providing the device with peeling means for separating the peeling member bonded to the image forming materials and the image holding body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording material and a method and an apparatus for removing an image-forming substance, and more specifically, an image on which an image-forming substance is stably attached by an image-forming device such as a copying machine, a facsimile, a printer or the like. From the surface of the holder,
The present invention relates to a recording material for removing an image forming substance, a method and an apparatus for removing the image forming substance.

[0002]

2. Description of the Related Art The basic system of an electrostatic electrophotographic copying machine is classified into three systems of electrofax, xerography and NP. However, since the electrofax system requires photosensitive paper for copying, it is currently common. Paper-usable systems, especially xerographic systems, are the mainstream.
A plain paper copier (PPC) is characterized in that there are no restrictions on the copy paper, the running cost is low due to the use of plain paper, and the copying speed can be easily increased.

Due to the recent OA, a large amount of printer paper and copying paper, which are image carriers, have come to be used. Therefore, the problem of deteriorating the global environment due to deforestation has come to be caused. Conventionally, to solve this problem, there is only a method in which ink or the like which is an image forming substance on a sheet of paper that has been used once is taken, crushed, plowed again, and recycled to a paper called old paper. However, recently, the character image on the used paper was removed by cleaning,
Recording materials and methods that can be reused for copying or printing have been proposed.

Specifically, an image carrier (paper, OHP substrate, etc.)
Related to image forming substances (toner, etc.),
Furthermore, a peeling method, a peeling liquid required according to the peeling method,
Items related to auxiliary members such as release materials have been proposed.

Regarding the image carrier, JP-A-7-3115
23, JP-A-6-222604, JP-A-1
In JP-A-1-174709, a recording medium is used in which a hydrophilic resin is crosslinked as a swelling layer, or a swelling layer formed on the surface of a recording material is swelled by wetting with water or the like. A method of removing an image recorded on a recording material has been proposed.

Further, Japanese Patent Laid-Open No. 4-67043 discloses that
It has been proposed to use a support (erasable paper) which has been subjected to a release treatment on the surface of the support on the sheet, in particular, on one side so that the toner can be easily peeled off.

However, in these proposals, since the image carrier is restricted to the designated paper, a copying machine using a plain paper (PP) is used.
It has the drawback of limiting the characteristics of C) that there is no restriction on copying paper and that the running cost is low due to the use of plain paper, and the versatility of the technology is greatly narrowed.

On the other hand, as an image forming substance, Japanese Patent No. 29 is used.
No. 60229 or the like, a photochemically decolorizable toner (cyanine dye and organic boronic acid ammonium salt) or the toner described in JP-A-4-356086 is biodegradable plastic or photodegradable. Those containing a special material such as plastic have been proposed. Further, the hydrophilicity of the toner resin described in JP-A-8-146648 combined with a stripping solution having a toner resin swelling component is defined by OHV and AV, and JP-A-8-146.
Japanese Patent Application Laid-Open No. 650647/1990 proposes a toner having a specified specific surface area in order to ensure hydrophilicity, and Japanese Patent Application Laid-Open No. 8-146647 / 1990 containing a hydrophilic fine particle.

However, in the decolorized toner, the decolorized toner resin component remains on the recording medium, and the surface smoothness of the image carrier is remarkably deteriorated when reused as compared with the unused image carrier. However, since a limited color material is used as the toner, there is a problem of image quality deterioration due to insufficient color reproducibility, and when degradable plastic is used, it is difficult to completely remove the toner from an image with a large amount of adhered toner. There was a problem that was.

Further, a proposal of a toner in combination with a peeling liquid having a component that dissolves or swells a toner resin has been proposed.
The safety of the stripper (in consideration of safety, it is not preferable to add a solvent that easily dissolves the toner resin), the charging characteristics of the toner (the charging characteristics are deteriorated due to water absorption of the toner, and therefore the water absorption is positively improved). Therefore, the swelling and dissolution rate of the toner resin and the amount of absorption are limited, and the peeling ability is insufficient with only the desired effect of the toner alone. Therefore, as described in these patents,
It is indispensable to positively utilize the swelling effect of the paper substrate due to the water component of the stripping solution, but as a result, there is a great deal of paper reuse due to the elongation of the paper after drying, jams during re-copying, etc. Will have side effects.

The above-mentioned Japanese Patent Laid-Open No. 8-146647 discloses that
Although a substance containing hydrophilic fine particles is disclosed, the hydrophilic fine particles are an inorganic substance and do not dissolve or swell when absorbing water (function as a water absorption point). The side effect of the hydrophilic inorganic fine particles due to hydrophilic water absorption corresponds to the added amount, but the allowable range of the added amount was narrow.

As the peeling method, a method of directly applying a physical force by a brush, a removing blade or the like to the image holding member and the image forming substance to remove it, and by heating the peeling material and the image forming substance together, both are removed. A method of generating an adhesive force between the image holding member and the image forming substance by the adhesive force, or directly or indirectly after weakening the adhesive force between the image holding member and the image forming substance by an auxiliary member such as a peeling liquid. There has been proposed a method and the like for performing the manual peeling.

However, in either the direct or indirect peeling, the removal without weakening the adhesive force between the image support and the image-forming material cannot be expected because a high removal rate of the image-forming material cannot be expected. Increasing the rate leads to damage of the image carrier such as paper peeling when removing the image-forming substance, which is not preferable from the main purpose of reusing the image carrier.

Further, although peeling with a peeling liquid is preferable because it does not damage the paper and dramatically improves the peeling rate, excessive shearing liquid supply (paper swelling) causes shearing force between the paper and the toner. To generate and reduce the adhesive force,
Since the paper swells once, the paper is stretched even after drying, and it is easy for jams and the like to occur in the copying machine when the paper is reused or re-copied. Since it is a non-aqueous resin, it is difficult to permeate into the toner film even if it is a release liquid containing a surfactant, and as a result it is difficult to supply the release liquid component between the paper and the toner unless the level is soaked It has drawbacks such as

Under such circumstances, in a recording material method and apparatus which can remove an image-forming substance such as a character image on an image support such as paper once used for cleaning and reuse it for copying or printing, There is a demand for a method that does not impose any restrictions on the holder and the image-forming substance, and weakens the adhesive force between the image-supporting member and the image-forming substance with a small amount of peeling liquid that does not affect the image support such as paper. It was rare.

[0016]

In view of the above situation, the present invention uses a highly versatile plain paper and mainly uses a safe aqueous solvent by using an image forming substance capable of achieving high image quality. With the stripping solution as a component, the image-forming substance can be easily stripped even in a solid image without positively swelling and damaging the image carrier, and side effects due to water absorption can be prevented. It is an object of the present invention to provide a recording material, a method and an apparatus for removing an image forming substance that can be used.

[0017]

In order to solve the above problems, the present inventor has conducted intensive studies by paying attention to the formation state of the image forming substance film, and as a result, completed the present invention.

That is, according to the present invention, firstly, an image-forming substance film comprising at least a hydrophobic resin and a colorant is fixed on an image-holding member, and an image-forming substance film adhered and formed on the surface of the image-holding member is formed. A recording material which is removed from the image carrier by supplying an aqueous stripping solution, characterized in that an image forming substance film in which minute regions of water absorption are distributed in a sea-island state is formed in the image forming substance film. Recording material is provided.

According to the first invention, the following (1) to (1
The recording material described in 5) is included. (1) A recording material which is obtained by externally adding water-absorbent resin fine particles to the image-forming substance. (2) The content of the water-absorbent resin fine particles is such that the image-forming substance 1
The recording material is 1 to 50 parts by weight with respect to 00 parts by weight. (3) A recording material in which the water-absorbent resin particles are a compound containing at least a carboxyl group or a crosslinked product thereof. (4) A recording material in which the water-absorbent resin particles are a compound containing at least a carboxyl group or a carboxyl group inorganic salt or a cross-linked product thereof. (5) A recording material in which a part of the hydrophilic groups of the water-absorbent resin particles forms a salt with a modifying agent composed of a modifying group that ionically bonds with the hydrophilic group and a lipophilic group. (6) A recording material in which a part of the hydrophilic groups of the water-absorbent resin particles form a hydrogen bond with a modifier consisting of a modifying group forming a hydrogen bond with the hydrophilic group and a lipophilic group. (7) A recording material in which the modifier contains a lipophilic group having a C6 to C22 alkyl group. (8) A recording material in which the modifier contains a lipophilic group having a dialkyl group. (9) A recording material in which the modifier contains a lipophilic group having at least one benzene ring. (10) 20 to 95% of the hydrophilic groups of the water absorbent resin particles are
A recording material that has been treated with a modifier. (11) A recording material in which 2 to 50% of the hydrophilic groups of the water absorbent resin particles are treated with a modifier. (12) A recording material in which the diameter of the water-absorbent resin particles is 0.1 to 10 μm. (13) A recording material, wherein the aqueous stripping solution is an aqueous solution containing 0.1 to 50 parts by weight of a surfactant with respect to 100 parts by weight of the aqueous stripping solution. (14) The critical surface tension of the aqueous stripper is 30 dyn /
Recording material that is less than or equal to cm. (15) A recording material in which the water-based stripping solution contains an anionic compound.

According to the present invention, secondly, an image in which water-soluble or water-absorbing microscopic regions formed of at least a hydrophobic resin and a colorant fixed on the surface of the image carrier are distributed in a sea-island state in the image-forming substance film. The water-based stripping solution is supplied to the film-forming material film, and the water-absorbent resin fine particles that have absorbed the stripping solution are interposed at the interface between the image carrier and the image-forming material to weaken the adhesive force between the two and hold the image-forming material as an image. A method of removing an image-forming substance is provided which comprises removing it from the body.

Further, according to the present invention, thirdly, an adhesive force larger than the adhesive force between the image carrier and the image forming substance weakened by the supply of the peeling liquid can be exerted on the image forming substance. An image is formed by adhering a peeling member made of a material to an image forming substance on the image carrier, and providing peeling means for separating the peeling member and the image carrier, which are bonded to the image forming substance. An apparatus for removing an image-forming substance is provided which is characterized in that the substance is removed from an image carrier.

[0022]

DETAILED DESCRIPTION OF THE INVENTION In the present invention, an image-forming substance consisting of at least a hydrophobic resin and a colorant is fixed on an image-holding member, and the image-forming substance film adhered and formed on the surface of the image-holding member is treated with an aqueous stripping solution. In the recording material to be removed from the image carrier by supplying the image-forming substance film, the water-absorbing microscopic regions are distributed in a sea-island state in the image-forming substance film, thereby forming an adhesion film on the surface of the image carrier. Even in the solid image area where the peeling liquid is most likely to be repelled through the water-absorbing microscopic areas scattered in a sea-island shape in the image-forming substance film, the peeling liquid passes through the water-absorbing microscopic areas scattered in the film. Water and a release agent such as a surfactant are dispersed at the interface between the image carrier and the image-forming substance with a small amount of a release liquid (without positively swelling paper etc.) in a short time, and Weaken the adhesion of the image forming material To ease. Further, the re-fixing of the image-forming substance on the image holding member during peeling heating is also prevented by the presence of water and a surfactant at the interface between the image holding member and the image forming substance.

By externally adding the water-absorbent resin fine particles to the image-forming substance, the image-forming substance and the water-absorbent resin fine particles necessary for the peeling process can be independently selected, and a conventional image-forming substance suitable for conventional image quality is used. At the same time, since the fine particles function more efficiently than the internal addition, the addition amount can be kept low, and the influence of the addition of the resin fine particles on the image quality can be minimized.

Further, when the content of the water-absorbent resin fine particles is 1 to 50 parts by weight with respect to 100 parts by weight of the image-forming substance, a good effect of the water-absorbent resin can be obtained, and side effects can be kept at a level without problems. Is possible.

When the water-absorbent resin particles are a compound containing at least a carboxyl group and a crosslinked product thereof, the absorption capacity of the particles for the stripping solution is improved by the carboxyl groups of the hydrophilic groups, and the water-absorbent resin fine particles of the crosslinked product absorb water. By swelling the volume of time by several tens of times or more, the diffusion area of the stripping solution is greatly expanded, and the absorption capacity of the image-forming substance film is further increased. By giving a swelling strain to the film, a deformation such as a crack is generated in the film, so that an effect equivalent to the swelling effect of the conventional image carrier is generated without swelling the image carrier, and peeling is promoted. .

Further, since the water-absorbent resin particles are a compound containing at least a carboxyl group and a carboxyl group inorganic salt and a cross-linked product thereof, the water absorbing ability (speed) is improved by the carboxyl group inorganic salt more than the carboxyl group.

Further, the aqueous solution containing the surfactant in an amount of 0.1 to 50 parts by weight improves the wettability to the image forming substance and the water-absorbent resin fine particles and improves the water absorbing ability of the image forming substance film. . Further, due to the action of the lipophilic group of the surfactant, the peeling liquid is adsorbed to the image-forming substance instead of inside the paper at the interface between the image-forming substance and the image-holding member and stays at the interface between the image-holding member and the image-forming substance. This makes it possible not only to release the image-forming substance from the image support but also to prevent re-fixation of the image-forming substance to the image-holding member during heating for peeling.

Further, the critical surface tension of the stripping solution is 40 dyn.
/ Cm or less, it becomes easy to wet with the water-absorbent resin fine particles, and when it is 30 dyn / cm or less, the wettability to the image forming substance is significantly improved, and the repellency of the peeling liquid from the image forming substance is improved.

Further, part of the hydrophilic groups of the water absorbent resin particles are
By forming a salt with a modifier consisting of a modifying group that ionically bonds with a hydrophilic group and a lipophilic group, the hydrophilic group of the water-absorbent resin is sealed in moisture resistance during storage, and a stable dispersion state (water-absorbing property) is obtained. (Agglomeration prevention due to moisture absorption of resin fine particles) can be maintained.

This water absorption is caused by a part of the hydrophilic group of the resin particles,
By forming a hydrogen bond with a modifier consisting of a modifying group that forms a hydrogen bond with a hydrophilic group and a lipophilic group, the moisture resistance during storage was stabilized by restraining the hydrophilic group of the water-absorbing polymer. Maintain the dispersed state (prevention of aggregation of water-absorbent resin fine particles due to moisture absorption). Furthermore, when the stripping solution is supplied, the hydrophilic group is immediately opened due to the weak hydrogen bond, and the stripping solution is quickly absorbed.

The modifier of claim 10 used in the present invention is C6.
By containing a hydrophobic long-chain group having a C22 alkyl group, it inhibits the infiltration of moisture into the water-absorbent resin fine particles during storage, and even if the water-absorbent resin fine particles absorb a small amount of moisture, contact between the particles occurs. To prevent agglomeration. Further, it also prevents interfacial contact between the image-forming substance and the water-absorbent resin fine particles.

Since the modifier contains a plurality of hydrophobic long chain groups having a dialkyl group, the lipophilic group more effectively inhibits moisture from penetrating into the water absorbent resin fine particles during storage,
Even if the water-absorbent resin fine particles absorb a small amount of moisture, contact between the particles is prevented and aggregation is prevented. Further, it also prevents interfacial contact between the image-forming substance and the water-absorbent resin fine particles.

Further, since the modifying agent contains a hydrophobic long-chain group having at least one benzene ring and which is difficult to bend, the lipophilic group can more effectively infiltrate moisture into the water-absorbent resin fine particles during storage. Further, even if the water-absorbent resin fine particles absorb a small amount of moisture, contact between the particles is prevented and aggregation is prevented. Further, it also prevents interfacial contact between the image-forming substance and the water-absorbent resin fine particles.

Since 20 to 95% of the hydrophilic groups of the water-absorbent resin particles are treated with the modifier, the hydrophilic groups that contribute to moisture absorption are bound by hydrogen bonds, and the lipophilic groups are effectively protected from moisture during storage. It inhibits the infiltration of the water-absorbent resin fine particles to prevent the water-absorbent resin fine particles from aggregating. Further, the weak binding force and the degree of modification are well balanced, and the absorption rate of the stripping solution is hardly reduced.

In addition, the hydrophilic group of the water-absorbent resin particles should be 2-50.
% Of the water-absorbent resin fine particles of the moisture during storage when the lipophilic group is effectively stored with almost no decrease in the absorption rate of the stripping solution due to being treated with the modifier by the ionic bond. It is possible to prevent the water-absorbent resin fine particles from aggregating by inhibiting the infiltration into

Further, since the water-absorbent resin particles have a particle size of 0.1 to 10 μm, preferably 0.1 to 5 μm, they can be uniformly mixed with the image-forming substance and, at the same time, the side effect on the image density due to the finer particles. It should be kept to a minimum.

Further, since the stripping solution contains the anionic compound, the absorption rate of the stripping solution is hardly reduced even in the cationic water-absorbing modified resin.

A water-based stripping solution is supplied to the image-forming substance film in which the water-soluble or water-absorbing microscopic regions consisting of at least the hydrophobic resin and the colorant fixed on the surface of the image carrier are distributed in a sea-island state. By interposing the water-absorbent resin fine particles that have absorbed the peeling liquid at the interface between the holding body and the image-forming substance, and removing the image-forming substance from the image-holding body by weakening the adhesive force between the two, a highly versatile plain paper, By using an image-forming substance that achieves high image quality, the image-forming substance can be easily removed even in a solid image without causing swelling and damage to the image carrier with a stripping solution centered on a safe water solvent. It can be peeled off.

On the image holding member, a peeling member made of a material capable of exerting an adhesive force on the image forming substance that is greater than the adhesive force between the image holding member and the image forming substance weakened by the supply of the peeling liquid is provided. By providing a peeling member that is adhered to the image forming substance and separates the image holding member and the peeling member that is adhered to the image forming substance, the strong adhesion between the peeling member and the image forming substance allows The image-forming substance can be reliably peeled off from the image carrier.

The image carrier in the present invention is a general paper made of fibrous material used for ordinary copying machines, printers, etc.,
The film is a plastic film such as OHP, but is not limited thereto.

The image forming substance is composed of at least a colorant and a binder resin, and includes various toners used for electrophotographic copying, powder inks such as solid ink jets, thermal transfer wax, resin substance inks and general printing inks. .

An example of the electrostatic charge image developing toner represented by the image forming substance of the present invention will be described. Usually, the components used in the toner, that is, containing a thermoplastic binder resin and a colorant, if desired, a charge control agent, a release agent, etc.
It may have a toner property improving agent. When finally obtaining a magnetic toner, magnetic powder may be added. Further, the toner surface may be treated with a post-treatment agent for the purpose of improving fluidity and the like.

As the thermoplastic binder resin constituting the toner, those usually used in toner can be used. For example, styrene acrylic resin, styrene resin, (meth) acrylic resin, olefin resin, polyester resin, amide resin, polycarbonate resin, polyether resin, polysulfone resin, epoxy resin, urea resin Examples thereof include resins, thermoplastic resins such as urethane resins, and copolymers or blends thereof.

The molecular weight is Mn 6,000 to 20,
Those of about 000 are generally used. Mw / Mn is about 2-100. However, it is not always necessary to pay attention to these numerical values, and there is no particular limitation as long as the required performance as a toner is satisfied.

As the colorant constituting the toner,
The toner is not particularly limited as long as it is used in a normal toner, and for example, organic or inorganic pigments and dyes of various colors as described below can be used.

Examples of black pigments include carbon black, copper oxide, manganese dioxide, aniline black, activated carbon, non-magnetic ferrite, magnetic ferrite, magnetite and the like.

Examples of yellow pigments include yellow lead, zinc yellow, cadmium yellow, yellow iron oxide, mineral fast yellow, nickel titanium yellow, navels yellow, naphthol yellow S, hanzer yellow G, hanzer yellow 10G, and benzidine yellow G. , Benzidine yellow GR, quinoline yellow lake, permanent yellow NCG, tartrazine lake and the like.

Examples of the orange pigment include red yellow lead, molybdenum orange, permanent orange GTR, pyrazolone orange, vulcan orange, induslen brilliant orange RK, benzidine orange G, induslen brilliant orange GK and the like.

Examples of red pigments include red iron oxide, cadmium red, red lead, mercury sulfide, cadmium, permanent red 4R, resole red, pyrazolone red, watching red, calcium salt, lake red C, lake red D, brilliant carmine 6B, eoxy lake. , Rhodamine Rake B, Alizarin Rake, Brilliant Carmine 3B and the like.

Examples of purple pigments include manganese purple, fast violet R, methyl violet lake and the like.

Examples of blue pigments are navy blue, cobalt blue, alkali blue lake, Victoria blue lake,
Phthalocyanine blue, metal-free phthalocyanine blue,
Examples include phthalocyanine blue partially chlorinated compounds, fast sky blue, induslen blue BC, and the like.

Examples of green pigments include chrome green, chrome oxide, pigment green B, malachite green lake, and final yellow green G.

As white pigments, zinc white, titanium oxide,
Examples thereof include antimony white and zinc sulfide.

Examples of extender pigments include barite powder, barium carbonate, clay, silica, white carbon, talc, and alumina white.

Examples of various dyes such as basic dyes, acid dyes, dispersion dyes and direct dyes include nigrosine, methylene blue, rose bengal, quinoline yellow and ultramarine blue.

These colorants may be used alone or in combination of two or more. The amount of these colorants added is 1 to 20 parts by weight, and more preferably 2 to 10 parts by weight, based on 100 parts by weight of the binder resin. If it is less than 1 part by weight, the desired image density cannot be obtained, and if it is more than 20 parts by weight, the fixing property of the toner is deteriorated, which is not preferable.

When used as a light-transmitting color toner, pigments and dyes of various colors as described below may be used as the colorant.

Examples of the yellow pigment include C.I. I. 10316
(Naphthol yellow S), C.I. I. 11710 (Hansa Yellow 10G), C.I. I. 11660 (Hansa Yellow 5G), C.I. I. 11670 (Hansa Yellow 3
G), C.I. I. 11680 (Hansa Yellow G), C.I.
I. 11730 (Hansa Yellow GR), C.I. I. 11
735 (Hansa Yellow A), C.I. I. 11740 (Hansa Yellow RN), C.I. I. 12710 (Hansa Yellow R), C.I. I. 12720 (Pigment Yellow L), C.I. I. 21090 (Benzisine yellow),
C. I. 21095 (Benzisine Yellow G), C.I.
I. 21100 (Benzisine Yellow GR), C.I. I.
20040 (Permanent Yellow NC), C.I. I. Two
1220 (Vulcan Fast Yellow 5), C.I. I. Two
1135 (Vulcan Fast Yellow R) and the like.

As the red pigment, C.I. I. 12055
(Stalin I), C.I. I. 12075 (permanent orange), C.I. I. 12175 (Resor Fast Orange 3GL), C.I. I. 12305 (Permanent Orange GTR), C.I. I. 11725 (Hansa Yellow 3R), C.I. I. 21165 (Vulcan Fast Orange GG), C.I. I. 21110 (benzidine orange G), C.I. I. 12120 (Permanent Red 4
R), C.I. I. 1270 (Para Red), C.I. I. 12
085 (Fire Red), C.I. I. 12315 (Brilliant Fast Scarlet), C.I. I. 1231
0 (Permanent Red F2R), C.I. I. 12335
(Permanent Red F4R), C.I. I. 12440
(Permanent Ent Red FRL), C.I. I. 124
60 (Permanent Red FRLL), C.I. I. 124
20 (Permanent Red F4RH), C.I. I. 124
50 (light fast red toner B), C.I. I. 12
490 (Permanent Carmine FB), C.I. I. 158
50 (Brilliant Carmine 6B) and the like.

As the blue pigment, C.I. I. 741
00 (metal-free phthalocyanine blue), C.I. I. 741
60 (phthalocyanine blue), C.I. I. 74180
(Fast Sky Blue) and the like.

These colorants may be used alone or in combination. The amount of these colorants added is 1 to 10 parts by weight, and more preferably 2 to 5 parts by weight, relative to 100 parts by weight of the binder resin contained in the toner particles. If it is less than 1 part by weight, the desired image density may not be obtained, and if it is more than 10 parts by weight, the fixing property and translucency of the toner are deteriorated, which is not preferable.

Further, the releasing agent (offset preventing agent) constituting the toner is not particularly limited as long as it is used in a normal toner. For example, low molecular weight polyethylene wax, low molecular weight oxidized polyethylene wax, low molecular weight polypropylene wax, low molecular weight oxidized polypropylene wax, candelilla wax, carnauba wax, rice wax, montan wax (derivative), paraffin wax (derivative), microcrystalline Examples thereof include wax (derivative), (oxidized) sazol wax, hydrogenated castor oil (derivative), 12-hydroxystearic acid, higher fatty acid wax, and higher fatty acid ester wax. These release agents are
You may use individually or in combination of multiple. The amount of these release agents added is 1 to 10 parts by weight, and more preferably 2 to 5 parts by weight for 100 parts by weight of the binder resin contained in the toner particles in the case of an oilless heat roll fixing device. If the amount is less than 1 part by weight, the fixability of the toner will decrease, and
When the amount is more than 0 parts by weight, the fixing property and the charging property of the toner are deteriorated, which is not preferable. Further, as long as it is a fixing device other than the oilless heat roll fixing device, it is not necessary to pay particular attention to the amount.

As the magnetic powder constituting the toner,
The toner is not particularly limited as long as it is used in a normal toner. For example, aluminum, cobalt,
Iron, lead, magnesium, nickel, zinc, antimony,
Examples thereof include metals such as beryllium, bismuth, cadmium, calcium, manganese, selenium, titanium, tungsten, and vanadium, alloys thereof, mixtures thereof, oxides, fired bodies (ferrite), and the like.

These magnetic materials may be used alone or in combination. The amount of the magnetic material added is 1 to 80 parts by weight, and more preferably 5 to 60 parts by weight, based on 100 parts by weight of the binder resin contained in the toner particles. If less than 1 part by weight, the effect of magnetic powder cannot be obtained,
If it is more than 80 parts by weight, the charging property will be deteriorated, which is not preferable.

As the charge control agent constituting the toner, the charge control agent used in ordinary toner can be used. Examples of the negative charge control agent that can be used include chromium complex salt type azo dyes S-32 and 33,
34, 35, 37, 38, 40 (manufactured by Orient Chemical Industry Co., Ltd.), Eisenspiron Black TRH, BHH (manufactured by Hodogaya Chemical Co., Ltd.), Kayaset Black T-22,004
(Nippon Kayaku Co., Ltd.), copper phthalocyanine dye S-39
(Manufactured by Orient Chemical Industry Co., Ltd.), chromium complex salt E-81 (manufactured by Orient Chemical Industry Co., Ltd.), zinc complex salt E-84 (manufactured by Orient Chemical Industry Co., Ltd.), aluminum complex salt E-86 (manufactured by Orient Chemical Industry Co., Ltd.), and calixarene. System compounds and the like. Examples of the positive charge control agent that can be used include Bontron N-01, Bontron P-51 (manufactured by Orient Chemical Industry Co., Ltd.), and imidazole compounds.

Among the above charge control agents, those having a large particle size are preferably used after being subjected to a process such as crushing in advance to have a desired particle size.

As the post-treatment agent added to the toner surface, any post-treatment agent used in ordinary toners can be used without particular limitation. For example, silicon carbide, boron carbide, titanium carbide, zirconium carbide,
Hydrophobic compounds of various carbides such as hafnium carbide, vanadium carbide, tantalum carbide, niobium carbide, tungsten carbide, chromium carbide, molybdenum carbide, calcium carbide and diamond carbon random, various nitrides such as boron nitride, titanium nitride and zirconium nitride, boro Hydrophobates of various boride compounds such as zirconium oxide, hydrophobized products of various oxides such as aluminum oxide, titanium oxide, iron oxide, chromium oxide, calcium oxide, magnesium oxide, zinc oxide, copper oxide, silica, molybdenum disulfide, etc. Hydrosulfides of sulfides, magnesium fluoride, fluorides such as carbon fluoride, aluminum stearate, calcium stearate, zinc stearate, various metal soaps such as magnesium stearate, talc, bentonite, and further cobalt, iron, nickel, Arminiu , Lead, magnesium, zinc, antimony, beryllium, bismuth, cadmium, calcium, manganese, selenium, titanium, tungsten, various inorganic fine particles such as alloys or alloys thereof or emulsion polymerization method, soap-free emulsion polymerization method, Styrene-based, (meth) acrylic-based, olefin-based, fluorine-containing (meth) acrylic-based, nitrogen-containing (meth) acrylic-based, epoxy, silicon granulated by a wet polymerization method such as a non-aqueous dispersion polymerization method or a gas phase method , Various organic fine particles such as benzoguanamine, melamine, and copolymers thereof. These may be used alone or in combination.

The amount of these post-treatment agents added is such that the toner 10
It is 0.01 to 5 parts by weight, more preferably 0.1 to 3 parts by weight, relative to 0 parts by weight. If it is less than 0.01 parts by weight, the effect of addition is not obtained, and if it is more than 5 parts by weight, the fluidity is adversely affected, which is not preferable.

The above toner can be manufactured by a conventionally known method for manufacturing toner particles. Examples thereof include a pulverization method, a granulation polymerization method such as emulsion polymerization and suspension polymerization, an emulsion dispersion granulation method, a wet granulation method such as a spray drying method, and a microencapsulation method. The particle size of the toner is 3 to
The thickness is 20 μm, preferably 4 to 15 μm, and more preferably 6 to 12 μm. If it is less than 3 μm, the electrification and fluidity are adversely affected and fog occurs, and
If it is larger than m, a high quality image cannot be obtained.

Further, the hydrophilicity of the recording material can be improved by adding a predetermined amount of a surfactant to the recording material at a level at which there is no practical problem in storage properties and charging characteristics. That is, the surfactant has both a hydrophilic group and a hydrophobic group in the structure, and is well adsorbed on the two-phase interface due to the balance between hydrophilicity and hydrophobicity, and the free energy or surface tension of the interface is significantly reduced. It shows the action. By this action, when a predetermined amount of surfactant is added, the hydrophilicity of the recording material is enhanced, and a recording material excellent in releasability can be obtained.

Examples of the surfactant that can be used include sodium laurate, sodium stearate, sodium oleate, sodium lauryl sulfate, sodium cetyl sulfate, sodium stearyl sulfate, sodium oleyl sulfate, sodium lauryl ether sulfate. , Sodium dodecylbenzene sulfonate, lauryl trimethyl ammonium chloride, lauryl dimethyl benzyl ammonium chloride, sodium lauryl amino propionate, lauryl dimethyl betaine, nonyl phenyl polyethylene glycol ether, stearic acid EO adduct,
Examples thereof include lauric acid monoglyceride, sorbitan stearic acid triester, and the like, but are not limited thereto.

The method of adding the surfactant may be either external addition or internal addition, but external addition is preferable because affinity with the stripping solution can be obtained with a smaller addition amount. This also applies to the addition of water-absorbent resin fine particles to the image-forming substance described later.

The external addition is to adhere or fix the surface active agent to the surface of the recording material particles. As a method,
For example, a method of adhering or sticking a surfactant to the particles of a recording material after it is manufactured, that is, a surface modifier such as a hybridizer or Ongmill on the surface of the recording material, or a mixer such as a Henschel mixer or Hi-X. The method of attaching or fixing is mentioned.

The internal addition is to add the components so that the constitutional components have the same form in any part of the recording material. As the method, for example, a method of adding a surfactant together with other recording material constituents at the time of manufacturing a recording material, that is, a surfactant is added together with recording material constituents such as a resin, a coloring material, a wax, and a charge control agent. Examples thereof include a method of compounding, kneading, pulverizing, classifying or compounding, and emulsifying and dispersing and granulating. Further, a surfactant may be added when the resin is produced by the suspension polymerization method.

In the present invention, the amount of the surfactant added to the recording material varies depending on the addition method, but is 0.02 in the case of external addition with respect to 100 parts by weight of the binder resin used in the printing material. ~ 2 parts by weight, 1 for internal addition
It is preferably from 10 to 10 parts by weight. In the external addition,
If it is less than 1 part by weight in 0.02 parts by weight of internal addition, the affinity for the stripping solution is deteriorated, and if it is more than 2 parts by weight in external addition and more than 10 parts by weight in internal addition, the degree of hydrophilicity is high. It is not preferable because the temperature becomes too high, the moisture is easily adsorbed, and the environmental property at the time of charging the printing material is deteriorated.

The peeling liquid used in the present invention has an effect of aggregating the recording material after peeling in order to prevent water, a surfactant, a water-soluble polymer, and the recording material peeled off if desired from adhering again to the paper. It may contain a certain component or the like.

The molecule of the surfactant is generally composed of a combination of a lipophilic group and a hydrophilic group.
Table 2 shows examples of hydrophilic groups. However, the lipophilic group and hydrophilic group of the surfactant are not limited to these.

[0078]

[Table 1]

[0079]

[Table 2]

Although many kinds of surfactants have been disclosed, generally, anionic (anionic) surfactants such as fatty acid derivative sulfuric acid ester, sulfonic acid type and phosphoric acid ester type, and quaternary surfactants. Ammonium salt, heterocyclic amine,
Cationic (cationic) surfactants such as amine derivatives,
Amphoteric surfactants, nonionic surfactants, and the like,
These representative surfactants are shown in Tables 3 to 7. However, the surfactant used in the present invention is not limited to these.

[0081]

[Table 3]

[0082]

[Table 4]

[0083]

[Table 5]

[0084]

[Table 6]

[0085]

[Table 7]

The amount of the surfactant added is based on the stripping solution.
It is desirable to be in the range of 0.1 to 50% by weight, preferably 0.1 to 5% by weight. When it is less than 0.1% by weight,
The above effects cannot be obtained, and when it is more than 50% by weight, bubbles and the like increase and handling is difficult.

From the function of the stripping solution, it is preferable that the stripping solution actively wets the recording material. For that purpose, it is desired that the critical surface tension of the solution is lower than that of the recording material.
cm or less, preferably 30 dyn / cm or less.

The water-soluble polymer can make contact such as cellulose fiber / thermoflexible ink (toner) image / water-soluble polymer / release material when the recording material is isolated in the concave portion of the paper, and its adhesion The force allows the heat-flexible ink (toner) image to be peeled off without damaging the paper quality. Representative examples of such water-soluble polymers include, but are not limited to, the polymers shown in Table 8.

[Table 8]

The concentration of the water-soluble polymer in the peeling liquid containing the water-soluble polymer and the image carrier capable of carrying the hydrophobic image is preferably 0.1 to 20%, more preferably 0.5 to 10%. Is. The concentration of water-soluble polymer
If it is too high, the viscosity becomes high and the penetration into the paper is delayed, which is not preferable.

The above-mentioned surfactants and water-soluble polymers used in the present invention are used as paper sizing agents and the like in the paper manufacturing industry. Therefore, even if they are used, the surface of paper is damaged. Rather, it has the effect of improving the surface of the paper. In order to prevent the peeled recording material from adhering to the paper again, examples of the component having an action of aggregating the peeled recording material include a surfactant, a higher fatty acid and a higher fatty acid ester.

Examples of higher fatty acids include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, ricinoleic acid, linoleic acid, linolenic acid, eleostearic acid, arachidonic acid, arachidonic acid. , Behenic acid, erucic acid, abietic acid, rosin acid, coconut oil, linseed oil, beef oil, tall fatty acid, phytic acid and the like.

Examples of the higher fatty acid ester include the above-mentioned higher fatty acid and a hydroxy compound, for example, methyl alcohol,
Ester compounds with alcohols such as ethyl alcohol, propyl alcohol and butyl alcohol, and polyhydric alcohols such as ethylene glycol, glycerin, pentaerythritol, sorbitol, diethylene glycol and dipropylene glycol are preferable. Higher fatty acid and /
Alternatively, the higher fatty acid ester has an effect of aggregating the recording material after deinking and preventing the recording material from being redeposited on the recording medium.

The higher fatty acid and / or higher fatty acid ester is added in an amount of 5 to 95% by weight, preferably 20 to 80% by weight, based on the stripping solution. If it is less than 5% by weight, the aggregating effect is lowered, and if it is more than 95% by weight, the effects of other components may be lowered.

The release agent of the present invention may be, for example, methanol, ethanol or n-, within a range that does not impair the effects of the present invention.
Butanol, isopropanol, ethoxyethanol and the like may be added.

Examples of the water-absorbent resin fine particles include starchy substances (branch starch, potato starch, tapioca starch, wheat starch, corn starch, etc.), mannan (konjac, etc.), seaweeds (funnel, agar, sodium alginate, etc.), plants Natural polymers such as mucilages (Trolloiye, tragacanth, gum arabic, etc.), microbial mucilages (dextran, levan, etc.), proteins (such as glue, gelatin, casein, collagen, etc.),
Cellulose type (viscose, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, etc.), starch type (soluble starch,
Carboxymethyl starch, dialdehyde starch, etc.)
Examples thereof include fine particles of semi-synthetic polymer, synthetic polymer (polyvinyl alcohol, sodium polyacrylate, polyethylene oxide, isobutylene-maleic anhydride, etc.), but are not limited thereto.

As a particularly preferable water-absorbent resin, one defined as a water-absorbent polymer obtained by crosslinking a part of a water-soluble resin that is gelled and swells when absorbing water, which is now being used in paper diapers and the like, has recently been attracting attention. All of them can be used, for example, poly N-vinylacetamide or a crosslinked compound of a carboxyl group represented by the following formulas (1) to (3), more specifically, represented by the following formulas (4) to (9) It is desirable that the polymer is made of any one of polyacrylic acid, polyacrylamide, sodium polyacrylate, or a copolymer of each of them. However, n and p are integers of 50 or more, m, o,
m ′ and m ″ represent integers of 1 or more.

[0097]

[Chemical 1]

[Chemical 2]

[Chemical 3]

[Chemical 4]

[Chemical 5]

[Chemical 6]

[Chemical 7]

[Chemical 8]

[Chemical 9]

Although these exhibit the above-mentioned functions as the behavior in peeling, they have a problem in moisture resistance during storage and have a problem that they adversely affect aggregation of particles during storage. Therefore, improvement by limiting the addition amount is not preferable because the desired stripping effect is reduced and becomes insufficient, and ideal water such as water or stripping aqueous solution actively absorbs water and keeps moisture out during storage. While not absorbing or suppressing the amount of moisture absorption as much as possible, the non-contact method of the moisture absorption interface, which is a side effect of moisture absorption, is studied by modifying the water absorbent resin, and normally the hydrophilic group of the water absorbent resin is ionically bonded to the hydrophilic group, A hydrophilic group is sealed or constrained by a modifier having a hydrogen-bonding modifying group and a long-chain group that is a hydrophobic group, and when the aqueous solution is supplied, the sealing group is dissociated to provide a modification. Has been resolved.

Specifically, the modifier for sealing the hydrophilic group of the water-absorbing particles is composed of a group forming an ionic bond or a hydrogen bond with the hydrophilic group and a lipophilic group such as an alkyl group. Preferred are those which form a hydrogen bond, and an alcohol group, a diol group, a carboxyl group, an ester group, an ether group, an amide group or a benzenecarboxylic acid group is bonded to a lipophilic group such as an alkyl compound shown in Table 1. Those that are preferred are. Specifically, it is a material represented by the following formulas (10) to (22) (where n is 6 to 22, R1 is CH3, C2H5, C3H7), and an amide group or benzene is used as an atomic group constituting the ionic bond. An amide group or a benzylamine group in which an alkyl compound is bonded, and a group for hydrogen bonding converted to a group for ionic bonding are preferable.

[Chemical 10]

[Chemical 11]

[Chemical 12]

[Chemical 13]

[Chemical 14]

[Chemical 15]

[Chemical 16]

[Chemical 17]

[Chemical 18]

[Chemical 19]

[Chemical 20]

[Chemical 21]

[Chemical formula 22]

Further, in order to enhance the moisture resistance effect, the modifier contains a lipophilic group having an alkyl group of C6 or more, preferably C2 to C22, so that the moisture-absorbing resin fine particles that absorb moisture during storage can be prevented. It is preferable because it has the function of inhibiting the infiltration and preventing the particles from contacting each other even if the water-absorbent resin fine particles absorb a small amount of moisture, thereby preventing aggregation. If it is less than C6, the effect of preventing infiltration of moisture is weak, and the effect of preventing aggregation cannot be obtained.
In addition, modification with C23 or higher significantly reduces hydrophilicity,
Absorption of the stripper becomes undesired.

Further, since the modifier contains a lipophilic group having a dialkyl group or contains a lipophilic group having at least one benzene ring, the water-absorbent resin fine particle interfaces can be formed from the steric effect of a long chain group. In addition, contact with the interface of the image forming substance is prevented, which is more preferable.

The modification ratio of the water-absorbent resin particles with the modifier for forming hydrogen bonds is 20 to 95 of the hydrophilic groups of the water-absorbent resin.
%, The absorption rate of the stripping solution is hardly decreased, and the infiltration of moisture into the water-absorbent resin fine particles during storage is inhibited by restraining the hydrophilic groups by hydrogen bonds, which is preferable. If it is less than 20%, the binding amount of hydrophilic groups is small and the effect of preventing moisture absorption is weak, and if it exceeds 95%, the absorbency of the stripping solution of the water-absorbent polymer is lowered and it takes an excessively long time, which is not preferable.

The modification ratio of the water-absorbent resin particles by the modifier forming the ionic bond is from 2 to 50 of the hydrophilic groups of the water-absorbent resin.
%, The absorption rate of the stripping solution is hardly reduced, and the infiltration of moisture into the water-absorbent resin fine particles during storage is inhibited by blocking the hydrophilic group by an ionic bond, which is preferable. If it is less than 2%, the amount of the hydrophilic group bound is small and the effect of preventing moisture absorption is weak, and if it exceeds 50%, the absorbing ability of the water-absorbent polymer for the stripping solution decreases, which is not preferable because it takes too long.

The particle size of the water-absorbent resin particles varies depending on the particle size of the image-forming substance to be externally added, but considering a general toner, it is 0.1 to 10 μm, preferably 0.1 to 5 μm. As a result, it is possible to uniformly mix with the image-forming substance and, at the same time, side effects can be minimized in the image density due to the formation of fine particles. If it is less than 0.1 μm, it is difficult to fulfill the required function of forming an absorption path. Not preferable.

The water-absorbing polymer obtained by modifying the ionic bond generally exhibits a cationic property, and the absorption rate is slow in the nonionic stripping solution. As an improvement, the stripping solution contains sulfonate, carboxylate, etc. It is preferable to contain an anionic compound or an anionic surfactant in order to improve the stripping solution absorption rate of the water-absorbent polymer.

If necessary, a charge control agent may be added to the water-absorbing polymer, and the method can be easily achieved by containing the charge-controlling agent aqueous solution or dispersion in the water-absorbing polymer and drying. To be done.

The water-absorbing polymer can be modified by a general modification method. For example, the water-absorbing polymer is dispersed in toluene or the like as a poor solvent to have a chemical bond interaction with an acid group. Then, a desired amount of the modifier compound considered to be added is added, and the mixture is reacted with stirring in a warm bath at 90 to 95 ° C. for several hours. Then, the contents are transferred to an eggplant type flask or the like, and the poor solvent such as toluene is distilled off under reduced pressure under aspirator reduced pressure. The modified water-absorbent resin fine particles can be obtained by, if necessary, subjecting the reaction solid matter to a modified powder by mixing with a mixer or the like.

The peeling member is constituted by using this peeling roller, peeling film or the like. Specifically, a toner component resin whose surface of the peeling member is the same as or similar to the above toner, a component resin of an adhesive, a heat resistant resin film, or the like can be used.
Further, a metal material such as an aluminum-based material, a copper-based material, a nickel-based material, or an iron-based material can be used, but the material is not limited to these. The resin may be water-soluble or water-insoluble.

As the component resin of the adhesive, there are protein-based adhesives such as glue, gelatin, albumin and casein,
Carbohydrate-based adhesives such as starch-based, cellulose-based, complex polysaccharide-based (Arabic gum, tragacanth gum, etc.), vinyl acetate polymers and copolymers, acrylics, ethylene copolymers, polyamide, polyester, polyurethane, etc. Plastic adhesive, polychloroprene type, nitrile rubber type,
Rubber adhesives such as recycled rubber, SBR, natural rubber, etc.,
Pressure-sensitive adhesives such as rubber-based or acrylic-based, polyethylene terephthalate (PET) in which titanium oxide is dispersed, and further polyether ether ketone of resin film alone,
Examples thereof include, but are not limited to, polysulfone, polyether sulfone, polyetherimide, polyethylene terephthalate, and aromatic polyamide film. Further, when the above resin is used, it is more preferable to have a multi-layer structure of at least two layers of a holder and a surface layer from the viewpoints of preventing elongation due to tension and heat, durability and the like.

[0110]

The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.

FIG. 1 is a sectional view showing an outline of a recording material reproducing apparatus used in Examples and Comparative Examples. In FIG. 1, a recording material 1 having a hydrophobic image formed of a heat-flexible or heat-softening image forming substance is fed from a paper feed tray 2 to a coating roller 5 by a paper feed roller 3 and a guide plate 4. Then, the image peeling liquid 6 is applied to the surface of the recording material 1 having the hydrophobic image at 1.0 g / m ² . The recording material 1 to which the image peeling liquid 6 is applied is a 100 μm thick polyetheretherketone film (Sumilite FS-, which is supported and rotated by a transport roller 8 having a heating element 7 inside, a support roller 9 and an elastic roller 14. 1100C (manufactured by Sumitomo Bakelite Co., Ltd.) and a heating roller 11 having a heating element 7 inside which rotates in contact with the peeling member at a position facing the transport roller 8 while being heated. Be transported. A temperature measuring element 13 for measuring the temperatures of the heating roller 11 and the transport roller 8 and controlling the heating temperature is in contact with the heating roller 11 and the transport roller 8. The temperature of the heating roller 11 is about 100 ° C., the temperature of the transport roller 8 is about 130 ° C.,
The feeding speed of the recording material 1 is about 20 mm / sec.

As a result, the heat-flexible or heat-softenable image-forming substance forming the hydrophobic image is transferred from the recording material 1 to the peeling member 10 and peeled and removed from the recording material. A pressing roller 12 for tensioning the peeling member 10 is in contact with the rotating peeling member 10, and a cleaning member 15 for removing the image forming substance transferred to the peeling member 10. Is in contact with the elastic roller 14 at a position facing the elastic roller 14. The recording material from which the image forming substance has been removed is separated from the peeling member 10, and is between the drying roller 16 having the heating element 7 therein and the belt 18 which is in contact with the drying roller 16 and is supported by the support roller 17 and rotates. It is sandwiched between and conveyed while being heated and dried.

Example 1 A normal PPC copying machine (FT2200 manufactured by Ricoh Co., Ltd.) was mixed with a toner for FT2200 manufactured by Ricoh Co., Ltd. and 1 micron fine particles of a water-soluble resin polyvinyl alcohol as water-absorbing fine particles in a weight ratio of 25%, and PPC paper ( Ricoh type 620
A toner image was formed on 0). As a result of observing the surface of the toner image with a scanning electron microscope at a magnification of 500, a favorable sea-island state due to the water-absorbent polymer was observed in the toner image. The PPC sheet was regenerated by removing the toner from the PPC sheet having the toner image by using the recording material reproducing apparatus described in FIG. 1 and the image peeling liquid A described below.

[0114] [Image stripping solution A] Anionic surfactant Sodium dialkyl sulfosuccinate Aerosol OT-100 (Mitsui Cytec) 10 parts by weight 90 parts by weight of water (Critical surface tension: 30 dyn / cm or less)

Example 2 Water-absorbent resin fine particles which are cross-linked sodium polyacrylate polymer as water-absorbent fine particles Sunfresh ST-
Other than using 100 MPS [manufactured by Sanyo Kasei Co., Ltd.],
The PPC paper was recycled in the same manner as in Example 1.

Example 3 A PPC paper was prepared in the same manner as in Example 1 except that as the water-absorbing fine particles, water-absorbing resin fine particles which were cross-linked polyacrylic acid polymer, Carbopol ETD2050 [manufactured by Nikko Chemicals Co., Ltd.] was used. Played back.

Examples 4 to 16 Water absorbing resin fine particles as water absorbing fine particles, Carbopol E
PPC paper was recycled in the same manner as in Example 1 except that a modified product of TD2050 (manufactured by Nikko Chemicals Co., Ltd.) was used. In addition, in order to evaluate the peeling evaluation result and the moisture resistance of the water-absorbent polymer particles, only the particles were heated at 30 ° C. 90%.
Table 9 also shows the results of evaluating the degree of aggregation of the fine particles after leaving them in the constant temperature and humidity bath for 100 hours.

Comparative Example PPC paper was recycled in the same manner as in Example 1 except that the water absorbent resin fine particles were not mixed.

[0119]

[Table 9] In Table 9, Ar represents a benzene ring. The evaluation levels are as follows. (Peeling Degree) ◯: Almost the entire surface is peeled off. Δ: There are some unpeeled parts. X: Almost no peeling. (Humidity resistance) ○: Agglomeration is released by impact and the original powder property is restored. Δ: Most of the aggregates are released by impact or the like, but some aggregates are present. X: All are aggregates.

Example 17 PPC paper was recycled in the same manner as in Example 1 except that the image stripping solution B shown below was used. The results are shown in Table 10.

[0121] [Image stripping solution B]     Nonionic surfactant       Polyoxyethylene secondary alkyl ether       BT7 [manufactured by Nikko Chemical Co., Ltd.] 10 parts by weight     90 parts by weight of water     (Critical surface tension: 30 dyn / cm or less)

[0122]

[Table 10]

[0123]

According to the present invention, an image-retaining solution containing a safe aqueous solvent as a main component is prepared by using an image-forming substance capable of achieving high image quality by using plain paper having high versatility. A recording material and an image-forming substance capable of easily peeling off the image-forming substance even in a solid image without swelling the body oppositely and without damaging the body and preventing side effects due to water absorption. The removal method and apparatus are provided, and the contribution to the image forming field such as a copying machine, a facsimile, and a printer is extremely large.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an outline of a recording material reproducing apparatus used in Examples and Comparative Examples.

[Explanation of symbols]

1 Recording material 2 paper tray 3 paper feed rollers 4 guide plate 5 Application roller 6 Image stripper 7 heating element 8 transport rollers 9 Support roller 10 Peeling member 11 heating roller 12 Pressing roller 13 Temperature measuring element 14 Elastic roller 15 Cleaning member 16 drying roller 17 Support roller 18 belts

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2H005 AA08 AA29 CA03 CA17 EA05                       EA07                 2H134 PA02 PA08 PB04 PB06 PB07                       PB10 PB12 PB15 PB16 PB18                       PB22 PE02 PE05

Claims (18)

[Claims] 1. An image-forming substance comprising at least a hydrophobic resin and a colorant is fixed on an image-holding member, and the image-forming substance film adhered and formed on the surface of the image-holding member is supplied with an aqueous stripping solution. A recording material to be removed from an image carrier, wherein an image-forming substance film having water-absorbing minute regions distributed in a sea-island state is formed in the image-forming substance film. 2. The recording material according to claim 1, wherein water-absorbent resin fine particles are externally added to the image-forming substance. 3. The recording material according to claim 2, wherein the content of the water-absorbent resin fine particles is 1 to 50 parts by weight with respect to 100 parts by weight of the image forming substance. 4. The recording material according to claim 2, wherein the water-absorbent resin particles are a compound containing at least a carboxyl group or a crosslinked product thereof. 5. The recording material according to claim 2, wherein the water-absorbent resin particles are a compound containing at least a carboxyl group or a carboxyl group inorganic salt or a cross-linked product thereof. 6. The water-absorbent resin particles according to claim 2, wherein a part of the hydrophilic groups forms a salt with a modifying agent consisting of a modifying group that ionically bonds with the hydrophilic group and a lipophilic group. The recording material according to any one of the above. 7. The water-absorbent resin particles, wherein a part of hydrophilic groups form hydrogen bonds with a modifying group consisting of a modifying group forming a hydrogen bond with the hydrophilic group and a lipophilic group. The recording material according to any one of to 5. 8. The recording material according to claim 6, wherein the modifier contains a lipophilic group having a C6 to C22 alkyl group. 9. The recording material according to claim 6, wherein the modifier contains a lipophilic group having a dialkyl group. 10. The modifier contains a lipophilic group having at least one benzene ring.
Or the recording material according to 7. 11. The hydrophilic group of the water-absorbent resin particles has 20 to 9 hydrophilic groups.
5% is treated with a modifier.
11. The recording material according to any one of 10. 12. The hydrophilic group of the water absorbent resin particles is 2 to 50.
% Treated with a modifier.
The recording material according to any one of 1. 13. The water-absorbent resin particles have a diameter of 0.1 to 1
The recording material according to claim 2, which has a thickness of 0 μm. 14. The water-based stripping solution 100 is the water-based stripping solution.
The recording material according to claim 1, which is an aqueous solution containing 0.1 to 50 parts by weight of a surfactant with respect to parts by weight. 15. The critical surface tension of the aqueous stripper is 30.
The recording material according to any one of claims 1 to 14, which has a dyn / cm or less. 16. The recording material according to claim 1, wherein the aqueous stripping solution contains an anionic compound. 17. A water-based stripping solution is applied to an image-forming substance film, wherein water-soluble or water-absorbing microscopic regions comprising at least a hydrophobic resin and a colorant fixed on the surface of an image-bearing member are distributed in a sea-island state in the image-forming substance film. The image forming substance is removed from the image holding member by interposing water-absorbent resin fine particles having absorbed the peeling liquid at the interface between the image holding member and the image forming member, and weakening the adhesive force between them. A method for removing an image forming substance. 18. A peeling member made of a material capable of exerting an adhesive force on an image forming substance, which is larger than an adhesive force between an image holding body and an image forming substance weakened by supply of a peeling liquid. It is possible to remove the image-forming substance from the image-bearing member by providing a peeling member that adheres to the image-forming substance on the body and separates the peeling member and the image-bearing member that are adhered to the image-forming substance. A device for removing a characteristic image forming substance.