JP4033825B2 - Peeling member for removing recording material, removal method using the same, removal apparatus, and image forming apparatus - Google Patents

Description

  The present invention relates to a peeling member for removing a recording material, a removal method using the same, a removal apparatus, and an image forming apparatus. More specifically, the present invention relates to general printing (such as relief printing, planographic printing), electrophotography, inkjet, thermal recording, Is a peeling member for removing a recording material from the surface of an image support on which an image forming substance formed by a writing instrument such as a crayon or a marker pen is stably attached, and a removing method and removing apparatus using the same. And an image forming apparatus.

Currently, a large amount of hard output is used as a means of displaying information in society, and this hard output method includes general printing (such as letterpress, lithographic printing), electrophotography, ink jet, thermal recording, as well as crayons and marker pens. However, there are no restrictions on the copy paper, the running cost of using plain paper is low, and it is easy to increase the copy speed. There is.
However, as a result of this hard output, a large amount of paper has been consumed, which has led to the problem of deterioration of the global environment due to deforestation.

  Conventionally, the problem of deterioration of the global environment has only been taken by removing the ink etc., which is the recording material on the paper once used, crushing it, re-making it, and recycling it to paper called waste paper Met. Recently, however, recording materials and methods have been proposed that can remove character images on paper once used for cleaning and reuse them for copying or printing. In particular, copying (electrophotography) that consumes a large amount of paper. In connection with this, many proposals have been made regarding the removal of toner as a recording material.

  Specifically, proposals related to image supports (paper, OHP substrates, etc.), recording materials (toner, etc.), and further, related to secondary methods such as release methods, release solutions used in release methods, release materials, etc. Has been.

With respect to the image support, the recording medium can be recorded by using a recording medium with a hydrophilic layer crosslinked, or by swelling the swelling layer formed on the surface of the recording material with water or the like. A method for removing an image recorded on a material has been proposed (see Patent Documents 1 to 3).
In addition, it has been proposed to use a support (erasable paper) that has been release-treated on the surface of the support on the sheet, in particular, one side in advance so that the toner is easily peeled off (see Patent Document 4).

  However, these proposals say that the image support is restricted to the designated paper, so there is no restriction on the copy paper of the plain paper use copying machine (PPC), and the running cost by using the plain paper is low. The feature was limited, and the versatility of the technology was greatly reduced.

On the other hand, as a recording material, a photochemically decolorable toner (cyanine dye and organic boronic acid ammonium salt: see, for example, Patent Document 5) or a toner contains a special material such as a biodegradable plastic or a photodegradable plastic. (See Patent Document 6) and the like have been proposed.
Further, in combination with a release liquid having a toner resin swelling component, toner resin hydrophilicity is defined by OHV and AV (see Patent Document 7), and toner specific surface area is defined to ensure hydrophilicity ( Patent Literature 8), those containing hydrophilic fine particles (see Patent Literature 9), and those containing a surfactant for ensuring water absorption (see Patent Literature 10) have been proposed.

  However, the decolored toner retains the decolored toner resin component on the recording medium, and the surface smoothness of the image support is significantly reduced when reused as compared to the unused image support. Since limited color materials are used, image quality degradation due to insufficient color reproducibility becomes a problem, and it is difficult to completely remove toner from an image with a large amount of toner adhesion when using degradable plastic. There was a problem.

Further, a proposal for improving the water absorption of a release liquid such as a toner containing a surfactant, which requires the combined use with a release liquid having a component that dissolves or swells the toner resin described in Patent Document 10, From the viewpoint of the safety of the stripping solution, it is not preferable to use a stripping solution containing a solvent that easily dissolves the toner resin, and further, the paper due to the elongation of the paper after drying due to the absorption and swelling of the paper substrate of the stripping solution. It has serious side effects such as reuse of paper and jam at the time of re-copying.
Therefore, when the effect of the release of the surfactant-containing toner alone was confirmed, the purpose of the surfactant is to improve the water absorption of the release liquid. Therefore, the release function cannot be achieved by itself. It was impossible.

  In addition, a proposal has been made to include a surfactant in an image material or an image support for the purpose of weakening the interface between the recording material and the image support during heat peeling. Although peeling is possible, the interface with the peeling member is weak, and practically sufficient peeling performance has not been obtained.

  Also, as a peeling method, a physical force by a brush, a removing blade or the like is directly applied to the image support and the recording material for removal, and the peeling material and the recording material are overlapped and heated so that the adhesive force between the two is increased. A method of removing the recording material from the image support by the adhesive force, a method of performing direct or indirect peeling after weakening the adhesive force between the image support and the recording material by an auxiliary member such as a peeling solution, etc. Has been proposed.

  However, in either direct or indirect peeling, removing without weakening the adhesion between the image support and the recording material does not allow a high removal rate of the image-forming substance, and forcibly increases the removal rate. This is not preferable from the viewpoint of reuse of the image support because the image support is damaged such as paper peeling when the recording material is removed.

  In addition, although peeling with a peeling liquid is preferable because it does not damage the paper and dramatically improves the peeling rate, an excessive peeling liquid supply (paper swelling) generates a shearing force between the paper and the toner, Reducing the adhesive force causes the paper to swell once, which causes the paper to stretch even after drying, which can easily cause jams in the copying machine when the paper is reused or re-copied. Since the toner resin is a non-aqueous resin, it is difficult for the toner film to penetrate into the toner film even if it is a surfactant-containing release liquid. However, it is difficult to supply between the toner and the toner.

In Patent Document 11, a heat-fusible ink is obtained by heating with an image-recording material on which an image is formed with a heat-meltable ink by interposing a heat-meltable release body, stacking a peeling substrate, cooling and peeling off. Is described.
In Patent Document 12, a heat-meltable resin layer is provided on the surface of a base material, and this resin is heated and brought into contact with printed erasable paper to remove and remove the toner image formed on the surface of the erasable paper. It is described.
In Patent Document 13, an image peeling member having an image peeling layer made of a heat-meltable resin on the peripheral surface of a base material is heated and separated from an image recording material to which an image forming material is adhered. An image forming material removing apparatus is described in which a forming material is transferred to an image peeling member.

  However, in any method, when actually performed, because the interface between the recording material and the image recording material is strong, the recording material is broken and cannot be completely removed, or the image recording material is broken (for example, If the image recording material is paper, a phenomenon such as tearing of the paper) often occurs, and the image cannot be reused.

  Under such circumstances, in a method and apparatus that can remove a recording material such as a character image on an image support such as paper once used by cleaning and reuse it for copying or printing, the image support and recording material However, there has been a demand for a method of peeling without weakening the adhesive force between the image support and the recording material without using any restrictions, without using a stripping solution that affects the image support such as paper.

Japanese Unexamined Patent Publication No. 7-311523 JP-A-6-222604 JP-A-11-174709 JP-A-4-67043 Japanese Patent No. 2960229 Japanese Patent Laid-Open No. 4-356086 JP-A-8-146648 JP-A-8-146650 JP-A-8-146647 JP-A-8-146649 JP-A-1-29729 Japanese Patent No. 2584112 JP 2000-267525 A

  In view of such a current situation, the present invention uses a highly versatile plain paper, uses a recording material that can achieve high image quality, and does not use a stripping solution (thus, swells the image support). It is an object of the present invention to provide a recording material peeling member, a removing method, a removing apparatus, and an image forming apparatus capable of easily peeling a recording material even in a solid image without damaging paper. Is.

  In order to solve the above-mentioned problems, the present inventor has intensively studied paying attention to the adhesive force between the recording material and the peeling member when peeling the recording material from the image support. Arrived.

That is, according to the present invention, the above problem can be achieved by the following configuration.
(1) An image recorded by using a recording material on an image support is heated in contact with a peeling member without being immersed in a liquid in advance, and then the recording material is imaged by peeling the peeling member from the image support. in recording material removal method for removing from the support,該剥away member is provided on the substrate and the substrate surface consists of a surface layer made of a material containing a thermoplastic resin that is deformed at the time of peeling the heating, the recording material is heated A recording material removing method, characterized in that the recording material is a recording material in which core fine particles encapsulating a substance capable of lowering the adhesive strength before heating is later added or added externally .
(2) An image recorded using a recording material on an image support is heated by bringing it into contact with a peeling member in advance without being immersed in a liquid, and then the peeling member is peeled off from the image support. In the recording material removing method for removing from a support, the peeling member comprises a base material and a surface layer made of a material containing a thermoplastic resin that is deformed during peeling heating, provided on the surface of the base material. Adhesion before or after heating the adhesive strength after heating, wherein the core fine particles added with a substance capable of lowering the adhesive strength after heating is lower than the adhesive strength before heating A method for removing a recording material, characterized in that a hydrophilic group of a substance that can be reduced below the force and at least a part of a hydrophilic group of a core particle form a salt by ionic bonding.
(3) An image recorded by using a recording material on an image support is heated by bringing it into contact with a peeling member in advance without being immersed in a liquid, and then peeling the peeling member from the image support to image the recording material. In the recording material removing method for removing from a support, the peeling member comprises a base material and a surface layer made of a material containing a thermoplastic resin that is deformed during peeling heating, provided on the surface of the base material. Adhesion before or after addition of core fine particles to which a substance capable of lowering the adhesive strength after heating is added or added to the core is added. A method for removing a recording material, wherein a hydrophilic group of a substance capable of lowering than the force and at least a part of a hydrophilic group of a core particle form a hydrogen bond.
( 4 ) The recording material removing method as described in any one of (1) to (3) above, wherein the recording material contains a thermoplastic resin.
( 5 ) The method for removing a recording material as described in ( 4 ) above, wherein the thermoplastic resin in the surface layer is the same as the thermoplastic resin in the recording material.
( 6 ) The recording material removing method according to any one of (1) to ( 5 ), wherein the material of the surface layer is the same material as the recording material.
( 7 ) The recording material removing method according to any one of (1) to ( 6 ), wherein the surface layer is heat-fixed on the substrate surface.
( 8 ) The recording material removing method according to any one of (1) to ( 7 ), wherein the recording material includes a material having at least a lipophilic group.
( 9 ) The recording material removing method according to any one of (1) to ( 8 ), wherein the recording material is a material mainly composed of a thermoplastic resin.
(10) The recording material according to (1), wherein the recording material is a recording material in which core fine particles including a substance capable of lowering the adhesive strength after heating is lower than the adhesive strength before heating are internally added. The recording material removing method according to any one of (4) to (9).

(11) The recording material according to (1), characterized in that the recording material is a recording material externally added with nuclear fine particles enclosing a substance capable of lowering the adhesive strength after heating than the adhesive strength before heating. ), The recording material removing method according to any one of (4) to (9).
(12) The recording material removing method as described in any one of (1) to (11) above, wherein the peeling temperature is equal to or higher than the fixing temperature at the time of image formation .
(13) A recording material removing apparatus for removing a recording material by using the recording material removing method according to any one of (1) to (12).
(14) The recording material removing apparatus according to the above (13), further comprising means for regenerating the peeling member.
(15) An image forming apparatus including at least charging, exposing, developing, transferring, and fixing steps, and having the function of the recording material removing apparatus described in (13) and (14) above. Image forming apparatus.
(16) The image forming apparatus as described in (15) above, further comprising means for heat-fixing a surface layer made of a thermoplastic resin or a material containing a thermoplastic resin on a substrate to produce a peeling member.

  According to the present invention, a highly versatile plain paper is used, and a recording material that can achieve high image quality is used without using a stripping solution or the like, and thus without swelling the image support, even in a solid image. A peeling member capable of powerfully peeling and removing a recording material, a recording material removing method and removal apparatus using the peeling member, and an image forming apparatus are provided, and contributes to the image forming field such as a copying machine, a facsimile, and a printer. Is extremely large.

  In the present invention, a recording material fixed on a solid image support in a solid state is separated by heating and separating a peeling member provided on the surface with a thermoplastic resin or a material containing a thermoplastic resin. The recording material is peeled off the image support by softening and generating an adhesive force with the peeling member.

Specifically, during heating for peeling, the thermoplastic resin or material containing the thermoplastic resin provided on the surface of the peeling member is deformed and closely adheres so as to wrap the recording material. It is possible to obtain peeling with little residual image on the support.
That is, at the time of peeling, peeling can be achieved by satisfying the relationship of (adhesive force between recording material and peeling member)> (adhesive force between recording material and image support).

  Furthermore, in order to strengthen the adhesive force between the recording material and the peeling member, the recording material and the peeling member are made closer to each other by adding a resin having a SP value close to that of the peeling member surface, and Alternatively, the adhesive force between the recording material and the image support can be increased by incorporating a substance (hereinafter referred to as “release agent”) that can reduce the adhesive force between the recording material and the image support by heating at the time of peeling. By weakening, peeling using the peeling member proposed by the present invention is more effective.

  In addition, the adhesive force between the recording material and the image support shown in the present specification is measured with a tacking tester (TACKINES TESTER MODEL TAC-II, manufactured by Reska Co., Ltd.), and is bonded at room temperature. The force is obtained by adhering double-sided tape to the tip of the probe (φ5 mm), the probe lowering speed: 120 mm / min, the lifting speed: 600 mm / min, the pressing pressure: 500 gf / φ5 mm, and the pressing pressure time: 10 sec. The peel force that is visually judged as peeled is defined as the adhesive force.

  In addition, the adhesive strength at the time of heat peeling is the polyether ether ketone, PEEK (Sumilite FS-1100C, manufactured by Sumitomo Bakelite Co., Ltd., 100 micron thickness) of a peeling member in which a thermoplastic resin is previously bonded to the surface of the probe at the tip of the probe. ) Is defined as the adhesive strength measured and evaluated under the same conditions at a predetermined peeling temperature. Actually, it was confirmed that when the release agent described later is contained in the recording material, the adhesive strength is lowered at the release temperature.

  In the present invention, an image recorded with a recording material used for forming and recording an image on an image support is brought into contact with a peeling member without being presoaked in a liquid having an effect of promoting the removal of the recording material. In a recording material removal method in which the recording material is removed from the image support by separating the peeling member and then heating, peeling is performed by providing a surface layer made of a thermoplastic resin or a material containing a thermoplastic resin on the substrate surface By using the member, the thermoplastic resin of the surface layer wraps the recording material at the time of peeling heating, so that the adhesive force between the peeling member and the recording material becomes strong. It is possible to greatly reduce the amount of recording material remaining on the recording medium.

  In addition, since the peeling performance is improved to a practical level by using this peeling member, a process that may cause disadvantages such as deterioration of paper after drying, such as immersing the image support in a liquid that promotes peeling. There is no need to do.

  When the recording material contains a resin component, the sp value between the thermoplastic resin and the recording material can be made closer by incorporating the resin component of the recording material into the thermoplastic resin of the peeling member, so that the peeling The adhesive force between the member and the recording material can be further strengthened. As a result, it is possible to further ensure the reduction in the amount of the recording material that remains on the image support without being completely adhered to the peeling member at the time of peeling.

  When the material containing the thermoplastic resin of the peeling member is the same material as the recording material, for example, when the recording material is a toner, the toner itself is used so that the state of the surface of the peeling member after the peeling of the recording material is recorded. Since it becomes the same as before peeling, the peeling member can be reused, and the cost for each peeling can be suppressed. In addition, it is not necessary to purchase a thermoplastic resin separately, and consumables costs can be reduced.

  By using heat fixing as a method of providing a thermoplastic resin or a material containing a thermoplastic resin on the surface of the peeling member, it is possible to produce the peeling member in the same process as when recording the recording material on the image support. Therefore, it is not necessary to prepare the peeling member production unit separately from the image production unit, and the apparatus can be made compact. Further, it becomes possible to produce a peeling member in the apparatus, and it becomes unnecessary to purchase a peeling member to which a thermoplastic resin is bonded, so that the cost of consumables can be reduced.

  By using a material having a lipophilic group as the recording material, the recording material is likely to be bound to the thermoplastic resin of the peeling member at the time of peeling heating, and remains on the image support without being able to adhere to the peeling member at the time of peeling. A reduction in the amount of recording material can be further ensured.

  By using a thermoplastic resin as the main component of the recording material, the anchor effect between the recording material and the image support can be reduced during peeling heating, and the peeling ability of the peeling member can be effectively exhibited. it can.

  By using a recording material with a release agent added internally and / or externally, an image that does not peel off due to rusting or the like is usually obtained with sufficient adhesion between the recording material and the image support. In addition, due to a decrease in the adhesive force between the recording material and the image support only at the time of peeling heating, coupled with an increase in the adhesive force between the recording material and the peeling member by the peeling member provided with the thermoplastic resin, And the adhesive strength of the peeling member)> (adhesive strength of the recording material and the image support) are further achieved.

  Further, by adding a release agent to the core fine particles and adding the core fine particles therein, the release agent can be mixed with the raw material of the recording material in a state of good fluidity when producing the recording material. The dispersion state in the recording material is improved, and the recording material can be peeled off from the image support without unevenness even in a solid image.

  By adding a release agent to the core particles and externally adding the core particles, the release agent can be added to the surface of the recording material with good fluidity, and the release agent should be uniformly present on the surface of the recording material. Thus, the effect of the release agent can be exhibited more effectively.

  By enclosing the release agent internally added to the recording material with core fine particles, the release agent changes in quality due to the influence of the recording material raw material during the production of the recording material, thereby improving the adhesive force between the recording material of the release agent and the image support. It can prevent that the effect to reduce falls.

  By enclosing the release agent externally added to the recording material with core fine particles, blocking due to deterioration of the heat-resistant storage stability during storage of the recording material by the release agent can be prevented, and the release agent is buried inside the agglomerate by blocking. And the effect of reducing the adhesive force between the recording material of the release agent and the image support can be prevented from being lowered.

  Either the hydrophilic group of the release agent and at least a part of the core fine particles form a salt by ionic bond, or the hydrophilic group of the release agent and at least a part of the core fine particle form a hydrogen bond. Thus, the release agent is bound to the core fine particles during storage, and side effects on the recording material due to addition of the release agent, such as a decrease in adhesive force during storage, can be improved.

  In particular, with regard to moisture resistance during storage, the moisture resistance of the core particles and release agent can be improved by sealing the nucleus particles and release agent amphiphilic groups, and the release agent is buried inside the agglomerates by blocking. And the effect of reducing the adhesive force between the recording material of the release agent and the image support can be prevented from being lowered.

When the peeling temperature is equal to or higher than the fixing temperature at the time of image formation , the recording material can be surely softened in a rubber state during peeling heating, and the thermoplastic resin on the surface of the peeling member can easily catch the recording material.

  The recording material removing device has a function of producing a peeling member having a surface provided with a thermoplastic resin or a material containing a thermoplastic resin, thereby recording without separately preparing a peeling member having a surface provided with a thermoplastic resin. The material can be peeled off.

  By providing the image forming apparatus with the function of a recording material removing device, the devices can be combined into one, and the size of the device can be made compact.

  When the image forming step (the step of bonding the peeling member and the recording material) is performed by fixing, the image forming step is a step of providing a thermoplastic resin or a material containing a thermoplastic resin on the substrate surface of the peeling member. By using the same as the above, it is possible to produce a peeling member using the same apparatus. By producing the peeling member with the image forming apparatus, the apparatuses can be combined into one, and the size of the apparatus can be made compact.

  The image support in the present invention is a general paper made of a fiber used for a normal copying machine, a printer, or the like, or a plastic film such as an OHP, but is not limited thereto. The recording material is composed of at least a colorant and a binder resin, and includes various toners used for electrophotographic copying, powder ink such as solid ink jet, thermal transfer wax, resin substance ink, and general printing ink.

The present invention will be described below by taking as an example the case where an electrostatic charge image developing toner is used as a recording material.
The toner for developing an electrostatic image contains components usually used in the toner, that is, a thermoplastic binder resin and a colorant, and optionally has a charge control agent, a release agent, a toner property improving agent and the like. Also good. Further, when it is finally desired to obtain a magnetic toner, magnetic powder may be added. Further, for the purpose of improving fluidity and the like, the toner surface may be treated with a post-treatment agent.

(Binder resin)
As the thermoplastic binder resin constituting the toner, those used in ordinary toners 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 And thermoplastic resins such as urethane resins and copolymers or blends thereof.

  The molecular weight is generally about Mn 6,000 to 20,000. Mw / Mn is about 2 to 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.

  Further, the colorant constituting the toner is not particularly limited as long as it is used in ordinary toners. For example, various organic or inorganic pigments and dyes as shown below are used. Is possible.

(Coloring agent)
Examples of the black pigment include carbon black, copper oxide, manganese dioxide, aniline black, activated carbon, nonmagnetic ferrite, magnetic ferrite, and magnetite.

  Yellow pigments include yellow lead, zinc yellow, cadmium yellow, yellow iron oxide, mineral fast yellow, nickel titanium yellow, navel yellow, naphthol yellow S, Hansa yellow G, Hansa yellow 10G, benzidine yellow G, benzidine yellow GR, Examples include quinoline yellow lake, permanent yellow NCG, and tartrazine lake.

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

  Examples of red pigments include bengara, cadmium red, red lead, mercury sulfide, cadmium, permanent red 4R, risor red, pyrazolone red, watching red, calcium salt, lake red C, lake red D, brilliant carmine 6B, Eoxy lake, rhodamine lake. B, alizarin lake, brilliant carmine 3B and the like.

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

  Examples of blue pigments include bitumen, cobalt blue, alkali blue lake, Victoria blue lake, phthalocyanine blue, metal-free phthalocyanine blue, phthalocyanine blue partially chlorinated, first sky blue, and induslen blue BC.

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

Examples of white pigments include zinc white, titanium oxide, 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, acidic, disperse, and direct dyes include nigrosine, methylene blue, rose bengal, quinoline yellow, and ultramarine blue.

These colorants may be used alone or in combination.
Moreover, the addition amount of these coloring agents is 1-20 weight part with respect to 100 weight part of binder resin, More preferably, it is 2-10 weight part.
If the amount is less than 1 part by weight, a desired image density cannot be obtained. If the amount is more than 20 parts by weight, the toner fixing property is lowered, which is not preferable.

When used as a translucent color toner, pigments and dyes of various colors as shown below may be used as the colorant.
Examples of yellow pigments include C.I. I. 10316 (Naphthol Yellow S), C.I. I. 11710 (Hansa Yellow 10G), C.I. I. 11660 (Hanza Yellow 5G), C.I. I. 11670 (Hanza Yellow 3G), C.I. I. 11680 (Hansa Yellow G), C.I. I. 11730 (Hansa Yellow GR), C.I. I. 11735 (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 (Benzicin Yellow), C.I. I. 21095 (Benzicin Yellow G), C.I. I. 21100 (Benzicin Yellow GR), C.I. I. 20040 (Permanent Yellow NC), C.I. I. 21220 (Vulcan Fast Yellow 5), C.I. I. 21135 (Vulcan Fast Yellow R) and the like.

  Examples of red pigments include C.I. I. 12075 (permanent orange), C.I. I. 12175 (Risor 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 4R), C.I. I. 12070 (Para Red), C.I. I. 12085 (Fire Red), C.I. I. 12315 (Brilliant Fast Scarlet), C.I. I. 12310 (Permanent Red F2R), C.I. I. 12335 (Permanent Red F4R), C.I. I. 12440 (Permanent Entred FRL), C.I. I. 12460 (Permanent Red FRLL), C.I. I. 12420 (Permanent Red F4RH), C.I. I. 12450 (Light Fast Red Toner B), C.I. I. 12490 (Permanent Carmine FB), C.I. I. 15850 (brilliant carmine 6B) and the like.

  Examples of blue pigments include C.I. I. 74100 (metal-free phthalocyanine blue), C.I. I. 74160 (phthalocyanine blue), C.I. I. 74180 (Fast Sky Blue).

These colorants may be used alone or in combination.
The addition amount of these colorants is 1 to 10 parts by weight, more preferably 2 to 5 parts by weight, with respect to 100 parts by weight of the binder resin contained in the toner particles.
If the amount is less than 1 part by weight, a desired image density may not be obtained.

(Release agent)
Further, the release 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 type) sazol wax, hydrogenated castor oil (derivative), 12-hydroxystearic acid, higher fatty acid wax, higher fatty acid ester wax and the like.

These release agents may be used alone or in combination.
The amount of these releasing agents added is 1 to 10 parts by weight, more preferably 2 to 5 parts by weight, in the case of an oilless hot roll fixing device, with respect to 100 parts by weight of the binder resin contained in the toner particles. When the amount is less than 1 part by weight, the toner fixing property is lowered, and when the amount is more than 10 parts by weight, the toner fixing property and charging property are deteriorated.
Further, if it is a fixing device other than the oilless heat roll fixing device, there is no need to pay particular attention to the amount.

(Magnetic powder)
Further, the magnetic powder constituting the toner is not particularly limited as long as it is used in normal toner.
For example, metals such as aluminum, cobalt, iron, lead, magnesium, nickel, zinc, antimony, beryllium, bismuth, cadmium, calcium, manganese, selenium, titanium, tungsten, panadium, alloys thereof, mixtures thereof, oxides, firing Body (ferrite) and the like.

These magnetic materials may be used alone or in combination.
Further, the addition amount of the magnetic substance is 1 to 80 parts by weight, more preferably 5 to 60 parts by weight with respect to 100 parts by weight of the binder resin contained in the toner particles.
If the amount is less than 1 part by weight, the effect of the magnetic powder cannot be obtained, and if it exceeds 80 parts by weight, the chargeability is lowered, which is not preferable.

(Charge control agent)
Further, as the charge control agent constituting the toner, a charge control agent used in normal toners can be used.
Usable negative charge control agents include, for example, chromium complex salt type azo dyes S-32, 33, 34, 35, 37, 38, 40 (manufactured by Orient Chemical Co., Ltd.), Eisenspiron Black TRH, BHH (retainer). Manufactured by Tsuchiya Chemical Co., Ltd.), Kayaset Black T-22,004 (manufactured by Nippon Kayaku Co., Ltd.), copper phthalocyanine dye S-39 (manufactured by Orient Chemical Co., Ltd.), chromium complex salt E-81 (manufactured by Orient Chemical Industrial Co., Ltd.), Examples thereof include 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 compounds.

Examples of positive charge control agents that can be used include Bontron N-01, Bontron P-51 (manufactured by Orient Chemical Industries), and imidazole compounds.
In addition, about the thing with a large particle size among the said charge control agents, it is preferable to use what adjusted the desired particle size by giving the process of grinding | pulverization etc. previously.

(Post-treatment agent)
The post-treatment agent added to the toner surface can be used without particular limitation as long as it is used in ordinary toners.
For example, hydrophobized and nitrided various carbides such as silicon carbide, boron carbide, titanium carbide, zirconium carbide, hafnium carbide, vanadium carbide, tantalum carbide, niobium carbide, tungsten carbide, chromium carbide, molybdenum carbide, calcium carbide, diamond carbon random, etc. Various nitrides such as boron, titanium nitride and zirconium nitride, hydrophobized products of various borides such as zirconium boride, aluminum oxide, titanium oxide, iron oxide, chromium oxide, calcium oxide, magnesium oxide, zinc oxide, copper oxide, silica Hydrophobized products of various oxides, such as sulfides such as molybdenum disulfide, hydrophobized products of fluorides such as magnesium fluoride and carbon fluoride, various metals such as aluminum stearate, calcium stearate, zinc stearate, magnesium stearate Soap, Various metals such as stone, bentonite, cobalt, iron, nickel, aluminum, lead, magnesium, zinc, antimony, beryllium, bismuth, cadmium, calcium, manganese, selenium, titanium, tungsten, vanadium or alloys thereof Styrenic, (meth) acrylic, olefinic, fluorine-containing (meth) acrylic granulated by inorganic fine particle or emulsion polymerization method, soap-free emulsion polymerization method, wet polymerization method such as non-aqueous dispersion polymerization method, gas phase method etc. Examples thereof include various organic fine particles such as a system, nitrogen-containing (meth) acrylic, epoxy, silicone, benzoguanamine, melamine, and copolymers thereof.
These may be used alone or in combination.

The amount of these post-treatment agents added is 0.01 to 5 parts by weight, more preferably 0.1 to 3 parts by weight with respect to 100 parts by weight of the toner.
If the amount is less than 0.01 parts by weight, the effect of addition cannot be obtained. If the amount is more than 5 parts by weight, the fluidity and the like are adversely affected.

(Toner production method)
The above toner can be produced by a conventionally known method for producing toner particles.
For example, granulation polymerization methods such as pulverization method, emulsion polymerization, suspension polymerization, etc., wet granulation methods such as emulsion dispersion granulation method, spray drying method, microencapsulation method and the like can be mentioned.
The particle size of the toner is 3 to 20 μm, preferably 4 to 15 μm, and more preferably 6 to 12 μm. If it is smaller than 3 μm, the chargeability and fluidity are adversely affected, fogging occurs, and if it is larger than 20 μm, a high-quality image cannot be obtained.

(paint remover)
The substance (release agent) that reduces the adhesive force between the recording material and the image support melts when heated and flows out between the recording material such as toner and the image support such as paper, or exists between the two during image formation. Any material can be used as long as it stays at the interface between the image support and the image-forming substance and intervenes between them to reduce the adhesive force between them.

  When the recording material such as toner is oleophilic, if a release agent having at least a hydrophilic group is used, the release agent has a low affinity with the oleophilic recording material when melted. Is eliminated and remains between the recording material and the image support. Further, if the image support has a hydrophilic group such as cellulose, the recording material and the image support are subjected to binding force such as hydrogen bonding with the hydroxyl group of the cellulose and do not penetrate into the image support. It intervenes between. Then, when the release agent is interposed between the recording material and the image support, the adhesive force between them can be effectively reduced, and good peeling can be achieved.

  In addition, when the thermoplastic resin of the recording material to be removed and the peeling member has a lipophilic group, a release agent having a hydrophilic group and a lipophilic group is used as the peeling agent. In addition to the effect of the above hydrophilic group, the toner is removed from the image support together with the recording material such as toner, and the release agent remaining on the image support is reduced and reused. The effect of preventing poor fixing of a new image due to the remaining release agent is exhibited.

Preferable specific examples of the release agent include hydrophilic groups such as carboxylic acid, hydroxycarboxylic acid, sulfonic acid, phosphonic acid, phosphinic acid, diol, quaternary ammonium salt, etc., and hydrocarbon-based lipophilic groups, more specifically. Specific examples thereof include, but are not limited to, compounds composed of n-alkyl series, branched chain alkyl series, aromatic substituted alkyl series, partially fluorinated, fully fluorinated alkyl series, and the like.
These may be used singly or as a mixture of several kinds.

Specific examples of the release agent include the following compounds, but are not limited thereto.
_{C 17 H 35 PO 3 H 2} , C 16 H 32 Diol, C 21 H 43 COOH, C 18 H 37 NH 2, (C 18 H 37) 2 PO 2 H, (OH) 3 ArCOOC 18 H 37, C 12 H ₂₅ PO ₃ H, (C ₈ H ₁₇ O) ₂ PO ₂ H, C ₁₀ H ₂₁ OPO ₃ H ₂ , C ₂₁ H ₂₃ COOH, CH ₃ (CH) ₁₅ CHOHCOOH, C ₉ F ₁₉ COOH, HF ₂ C (CF ₂ ) ₈ COOH, CH ₃ (CH) ₁₁ CHOHCHOH, CH ₃ (CH) ₁₅ SO ₃ HCHCOOR, CH ₃ (CH ₂ ) ₁₅ (CH ₃ ) ₃ NX

  The release agent may be added either externally or internally, but external addition is preferable because it exhibits the required function with a small addition amount. The same applies to the addition of nuclear fine particles to the recording material described later.

External addition refers to attaching or fixing a release agent to the surface of an image forming substance such as toner.
As the method, for example, a method of attaching or fixing a release agent to the particles after manufacturing the recording material, that is, a surface reformer such as hybridization or angmill on the surface of the recording material, a mixer such as Henschel mixer, Hi-X, etc. And a method of attaching or fixing the release agent.

The internal addition means that the constituent components are added in the same form regardless of the portion of the recording material, and more preferably, the release agent is added to the outermost shell so as to be distributed at a high concentration. It is.
As the method, for example, a method of adding a release agent together with other recording material components during the production of the recording material, that is, a release agent is prepared together with a recording material component such as resin, color material, wax, charge control agent, Examples of the method include kneading, pulverizing, classifying, or preparing and emulsifying dispersion granulation.
Further, a release agent may be added when the resin is produced by the suspension polymerization method.

The amount of the release agent added is not particularly specified, but is preferably as follows. In the case of external addition, the addition amount of the release agent is 1 to 50% by weight, preferably 5 to 20% by weight, based on the total amount of the release agent and the image forming substance. If the adhesive strength lowering function cannot be exhibited and the amount exceeds 50% by weight, the adhesive strength decreasing function is excessively exhibited and fixing failure occurs.
The addition amount of the release agent in the case of internal addition is 5 to 75% by weight, preferably 10 to 30% by weight, and preferably less than 5% by weight with respect to the total amount of the release agent and the image forming substance. If the adhesive strength lowering function cannot be exhibited, and the amount exceeds 75% by weight, the adhesive strength decreasing function is excessively exhibited and fixing failure occurs.

(Nuclear fine particles)
Examples of the core fine particles to which a release agent is added or included include, for example, silicon carbide, boron carbide, titanium carbide, zirconium carbide, hafnium carbide, vanadium carbide, tantalum carbide, niobium carbide, tungsten carbide, chromium carbide, molybdenum carbide, calcium carbide, Hydrophobized products of various carbides such as diamond carbon random, various nitrides such as boron nitride, titanium nitride and zirconium nitride, hydrophobized products of various borides such as zirconium boride, aluminum oxide, titanium oxide, iron oxide, chromium oxide, oxidation Hydrophobized products of various oxides such as calcium, magnesium oxide, zinc oxide, copper oxide and silica, sulfides such as molybdenum disulfide, hydrophobized products of fluoride such as magnesium fluoride and carbon fluoride, aluminum stearate, calcium stearate Zinc stearate, Various metal soaps such as magnesium stearate, talc, bentonite, cobalt, iron, nickel, aluminum, lead, magnesium, zinc, antimony, beryllium, bismuth, cadmium, calcium, manganese, selenium, titanium, tungsten, vanadium, etc. Various inorganic fine particles such as various metals or alloys thereof, emulsion polymerization method, soap-free emulsion polymerization method, wet polymerization method such as non-aqueous dispersion polymerization method, styrene type granulated by gas phase method, (meth) acrylic type, Olefin, fluorine-containing (meth) acrylic, nitrogen-containing (meth) acrylic, epoxy, silicon, benzoguanamine, melamine, starch (sweet potato starch, potato starch, tapioca starch, wheat starch, corn starch, etc.), mannan (konnyaku etc.) ), Seaweed (funari, cold , Sodium alginate, etc.), plant mucilage (troloaia, tragacanth gum, gum arabic, etc.), microbial mucilage (dextran, levan, etc.), natural polymers such as glue, gelatin, casein, collagen, etc. Course, methylcellulose, ethylcellulose, hydroxyethylcellulose, carboxymethylcellulose, etc.), starch-based (soluble starch, carboxymethyl starch, dialdehyde starch, etc.) semi-synthetic polymers and synthetic polymers (polyvinyl alcohol, sodium polyacrylate, poly N-vinyl) Fine particles such as various organic fine particles such as acetamide, polyacrylic acid, polyacrylamide, polyethylene oxide, isobutylene-maleic anhydride) and copolymers thereof. However, it is not limited to these. These may be used alone or in combination.

The core fine particles are more preferably fine particles having hydrophilic groups that form ionic bonds or hydrogen bonds with the release agent, or those having a hollow inside and enclosing the release agent.
Since the core fine particles are hollow, even if a large amount of release agent is added, the release agent is not constrained by the core fine particles during storage, causing no side effects such as a decrease in adhesion, and release of the release agent during heating. Is done well.

  Although these exhibit the above-mentioned functions as behavior at the time of peeling, the fine particles having a hydrophilic group generally have a problem in moisture resistance during storage, and have problems such as aggregation of particles during storage. Was. And the improvement which restrict | limits the addition amount is unpreferable since the desired peeling effect falls and becomes inadequate. Therefore, as an improvement, the hydrophilic groups of the core fine particles and the release agent are sealed or restrained by ionic bonds and hydrogen bonds to improve moisture resistance. By lowering or dissociating, the problem of having a hydrophilic group was solved by exerting a desired function.

  Specifically, as the release agent for sealing the hydrophilic group of particles having a hydrophilic group, those composed of a hydrophilic group and a group that forms an ionic bond or hydrogen bond and an oleophilic group such as an alkyl group are preferable, As what forms a hydrogen bond, what combined lipophilic groups, such as an alkyl compound, with an alcohol group, a diol group, a carboxyl group, an ester group, an ether group, an amide group, and a benzenecarboxylic acid group is preferable.

  Furthermore, the modifier contains a lipophilic group having a dialkyl group or contains a lipophilic group having at least one or more benzene rings, so that the water-absorbent resin fine particle interfaces or the like due to the steric effect of the long chain group Contact with the recording material interface is prevented, which is more preferable.

  Further, as a means for adding and enclosing the release agent to the core fine particles, it can be carried out by a general modification method. For example, the core fine particles are dispersed in a poor solvent such as toluene, and the chemical interaction with the acid group. A desired amount of a release agent compound, which is considered to have, is added and reacted, for example, in a warm bath at 90 to 95 ° C. with stirring for several hours. Thereafter, the content is transferred to an eggplant type flask or the like, and a poor solvent such as toluene is distilled off under reduced pressure under reduced pressure of an aspirator. Moreover, the target fine particles can be obtained by applying the reaction solid to a modified core fine particle powder as necessary using a mixer or the like.

Although the content of the release agent in the case of adding the release agent to the core fine particles is not particularly specified, it is preferably as follows.
The content of the release agent in the core fine particles to which the release agent has been added is 10 to 90% by weight, and if it is less than 10% by weight, the desired adhesive strength reduction function cannot be exhibited. The lowering function is exerted too much, resulting in poor fixing.
When the core fine particles to which the release agent is added are externally added to the image forming substance, the content of the core fine particles to which the release agent is added is 1 to 50% by weight based on the total amount of the core fine particles and the image forming substance. The content is preferably 5 to 30% by weight. Similarly, when internally added, the content is 5 to 75% by weight, preferably 10 to 40% by weight.
If it is less than these numerical ranges, the desired adhesive strength reduction function cannot be exhibited, and if it exceeds the numerical ranges, the adhesive strength reduction function is excessively exhibited, resulting in poor fixing.

(Base material)
The base material of the peeling member is constituted by using a peeling roller, a peeling film or the like, and a thermoplastic resin is provided on the surface. As a constituent material of the base material, a heat-resistant resin film or a metal material such as aluminum, copper, nickel, or iron can be used, but is not limited thereto. The resin film may be water-soluble or water-insoluble. Moreover, the thermoplastic resin on the surface of the peeling member may also serve as the resin film. Furthermore, an adhesive for adhering the thermoplastic resin on the surface of the peeling member and the base material may be included as a constituent material.

  Specific materials for the base material and adhesive include protein substances such as glue, gelatin, albumin and casein, carbohydrate substances such as starch, cellulose, and complex polysaccharides (such as gum arabic and tragacanth), acetic acid Vinyl polymers and copolymers, acrylics, ethylene copolymers, thermoplastics such as polyamide, polyester, polyurethane, rubbers such as polychloroprene, nitrile rubber, recycled rubber SBR, natural rubber Substances, pressure sensitive substances such as rubber and acrylic, vinyl acetate polymers and copolymers, acrylic, ethylene copolymers, polyamide, styrene acrylic resins, styrene resins, (meth) acrylic resins, olefins Resin, polyester resin, amide resin, polycarbonate resin, polyether resin, polysulfone Polyethylene terephthalate in which titanium oxide is dispersed, including thermoplastic resins such as epoxy resins, epoxy resins, urea resins, urethane resins, and resins having the same or similar affinity as toners such as copolymers or blends thereof (PET) and, further, polyether ether ketone, polysulfone, polyether sulfone, polyether imide, polyethylene terephthalate, aromatic polyamide film and the like of a resin film alone are included, but are not limited thereto.

(Thermoplastic resin)
As the thermoplastic resin, it is desirable to use a thermoplastic binder resin used in toner, for example, styrene acrylic resin, styrene resin, (meth) acrylic resin, olefin resin, polyester resin, amide resin. , Polycarbonate resins, polyether resins, polysulfone resins, epoxy resins, urea resins, urethane resins, and other thermoplastic resins, and copolymers or blends thereof, but are not limited thereto. Absent.

(Recording material removal device)
The recording material removing apparatus of the present invention will be described with reference to the drawings.
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 an image formed of a recording material is fed from a paper feed tray 2 to a removal unit by a paper feed roller 3 and a guide plate 4.

The recording material 1 is supported by a heating / conveying roller 8 having a heating element 7 therein, a support roller 9 and an elastic roller 14 and rotates. The surface of the recording material 1 has a thickness of 100 μm provided with a thermoplastic resin or a material containing a thermoplastic resin. A polyether ether ketone film (Sumilite FS-1100C manufactured by Sumitomo Bakelite Co., Ltd .: hereinafter referred to as “PEEK film”) is rotated in contact with the peeling member 10 at a position facing the peeling member 10 and its heating and conveying roller 8. It is sandwiched between the rollers 11 and conveyed while being heated.
A temperature measuring element 13 for measuring the temperature of the heating and conveying roller 8 and controlling the heating temperature is in contact with the heating and conveying roller 8.

  With the same configuration, the peeling member is removed, and the heating and conveying roller 8 is changed to a fixing roller used in a general copying machine, thereby fixing as an image fixing device.

As a result, the recording material is transferred from the recording material 1 to the peeling member 10 and peeled off from the recording material.
The rotating peeling member 10 is in contact with a pressing roller 12 for imparting tension to the peeling member 10. The image support from which the recording material has been removed is separated from the peeling member 10 and discharged.

Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to these examples.
First, evaluation methods in Examples and Comparative Examples will be described.
The evaluation levels are as follows.

(Peeling performance)
5: The entire surface is peeled off.
4: The entire surface is almost peeled off and some unpeeled portions are present.
3: An unpeeled part exists.
2: There is a considerable unexfoliated part.
1: Almost no peeling.
X: The PPC paper cannot be recycled because the PPC paper is torn.

(Storage stability of recording materials)
○: Good level △: Level with no practical problem ×: Level with practical problem

<Image formation>
[Examples 1-4 , Reference Examples 1-6 ]
(Peeling member)
As shown in Table 1, a release member was formed by forming the same material as the recording material as a surface layer on the surface of the PEEK film substrate.

(Recording material)
In the case of internal addition based on the composition of Ricoh's Imagio Toner Type 18, in the case of external addition, a release agent (X) or a core fine particle (A) to which a release agent is added is added at the toner production stage. Added a release agent (X) or core fine particles (A) to which a release agent was added to the toner to obtain a recording material as shown in Table 1.
A recording material containing no release agent (Comparative Examples 1 and 3) or a recording material containing release agents (Examples 1 to 10 and Comparative Example 2) on PPC paper (Ricoh type 6200) has a fixing roller temperature of about 130? Thus, a recording material was obtained by fixing and forming an image with toner image ID = 1.2 at a feeding speed of recording material 1 of about 30 mm / sec.

(Regeneration)
Using the recording material reproducing apparatus described in FIG. 1, the recording material is brought into contact with the peeling member at a temperature of about 140 ° C. of the conveying roller 8 and a feeding speed of about 30 mm / second, and the toner is peeled and removed from the PPC paper. Recycled PPC paper.
The evaluation results are shown in Table 1.

[Comparative Example 1]
The PPC paper was regenerated in the same manner as in Example 1 except that the release member was not provided with a thermoplastic resin and the toner was not formulated with a release agent.
[Comparative Example 2]
PPC paper was regenerated in the same manner as in Example 1 except that the release member was not provided with a thermoplastic resin.
[Comparative Example 3]
The PPC paper was regenerated in the same manner as in Example 1 except that no release agent was formulated in the toner.
The evaluation results are shown in Table 1 below.

  According to the present invention, it is easy to use general printing (such as relief printing, lithographic printing, etc.), electrophotography, ink jet, thermal recording method, and recording media recorded by writing tools such as crayons and marker pens without using a peeling solution. In addition, since the recording material can be peeled from the recording medium such as paper and the recording medium such as paper can be reused, the industrial utility is high.

It is sectional drawing which shows the outline | summary of the reproducing | regenerating apparatus of the recording material used in the Example and the comparative example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Recording material 2 Paper feed tray 3 Paper feed roller 4 Guide plate 7 Heat generating body 8 Heating conveyance roller 9 Support roller 10 Peeling member 11 Roller 12 Pressing roller 13 Temperature measuring element 14 Elastic roller

Claims (16)

An image recorded using the recording material on the image support is heated by bringing it into contact with the peeling member without being presoaked in a liquid, and then peeling the peeling member from the image support to remove the recording material from the image support. in recording material removal method for removing,該剥away member is provided on the substrate and the substrate surface consists of a surface layer made of a material containing a thermoplastic resin that is deformed at the time of peeling the heating, bonding the recording material after heating A recording material removing method, characterized in that the recording material is a recording material in which core fine particles enclosing a substance capable of lowering the adhesive strength before heating is added or added externally . An image recorded using the recording material on the image support is heated by bringing it into contact with the peeling member without being presoaked in a liquid, and then peeling the peeling member from the image support to remove the recording material from the image support. In the method for removing a recording material to be removed, the peeling member comprises a base material and a surface layer made of a material containing a thermoplastic resin that is deformed during peeling heating, provided on the surface of the base material. Internally or externally added to the core fine particles to which a substance capable of lowering the adhesive force before heating is added, and the adhesive force after heating is higher than the adhesive force before heating A method for removing a recording material, characterized in that a hydrophilic group of a substance that can be reduced and at least a part of a hydrophilic group of a core particle form a salt by ionic bonding. An image recorded using the recording material on the image support is heated by bringing it into contact with the peeling member without being presoaked in a liquid, and then peeling the peeling member from the image support to remove the recording material from the image support. In the method for removing a recording material to be removed, the peeling member comprises a base material and a surface layer made of a material containing a thermoplastic resin that is deformed during peeling heating, provided on the surface of the base material. Internally or externally added to the core fine particles to which a substance capable of lowering the adhesive strength before heating is added, the adhesive strength after heating being higher than the adhesive strength before heating A recording material removing method, wherein a hydrophilic group of a substance that can be lowered and at least a part of a hydrophilic group of a core particle form a hydrogen bond. Recording material removal method according to any one of claims 1-3, wherein the recording material is one that contains a thermoplastic resin. 5. The recording material removing method according to claim 4, wherein the thermoplastic resin in the surface layer is the same as the thermoplastic resin in the recording material. Recording material removal method according to any one of claims 1 to 5, wherein the material of said surface layer is the same material as the recording material. Recording material removal method according to any one of claims 1 to 6, characterized in that said surface layer is heated and fixed on the substrate surface. Recording material removal method according to any one of claims 1 to 7, wherein the recording material which comprises a material having at least lipophilic group. Recording material removal method according to any one of claims 1 to 8, wherein the recording material is a material mainly composed of thermoplastic resin. Claim wherein the recording material, characterized in that it is a recording material obtained by internally adding the fine core particles a substance inclusion complex which may be lower than the adhesive force before heating the adhesive strength after heating 1,4～ 10. The method for removing a recording material according to any one of 9 above. 5. The recording material according to claim 1, wherein the recording material is a recording material externally added with core fine particles that include a substance capable of lowering the adhesive strength after heating than the adhesive strength before heating. 10. The method for removing a recording material according to any one of 9 above. 12. The recording material removing method according to claim 1, wherein the peeling temperature is equal to or higher than a fixing temperature at the time of image formation . Recording material removing device and removing the recording material using a recording material removal method according to any one of claims 1 to 12. 14. The recording material removing apparatus according to claim 13, further comprising means for regenerating the peeling member. 15. An image forming apparatus comprising at least the steps of charging, exposing, developing, transferring and fixing, and further comprising the function of the recording material removing apparatus according to claim 13 or 14 . 16. The image forming apparatus according to claim 15 , further comprising means for heat-fixing a surface layer made of a thermoplastic resin or a material containing a thermoplastic resin on a substrate to produce a peeling member.

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