JP2006215494A - Image receiving sheet for electrophotography and image forming method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image receiving sheet for electrophotography excellent in planarity and glossiness after image formation, free from blister and relief, excellent also in water resistance and adhesion resistance, and enabling a high-quality image excellent in aesthetic property to be recorded thereon, and to provide an image forming method. <P>SOLUTION: The image receiving sheet for electrophotography includes at least a support having at least one polymer coating layer on both faces of a white plastic film, and a toner image receiving layer containing at least one selected from aromatic polyester resins and acrylic resins on the support. The image forming method includes a toner image forming step of forming a toner image on the image receiving sheet for electrophotography, and an image surface smoothing and fixing step of smoothing a surface of the toner image formed by the toner image forming step. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is excellent in flatness and gloss after image formation, has no blister and relief, is excellent in water resistance and adhesion resistance, and can record a high quality image excellent in texture and image It relates to a forming method.

  Conventionally, as a support for various image recording materials such as an electrophotographic image receiving sheet, a heat sensitive material, an ink jet recording material, a sublimation transfer material, a heat developing material, a silver salt photographic material, and a heat transfer material, for example, base paper, synthetic paper Synthetic resin sheets, coated paper, laminated paper, and the like are used.

As the electrophotographic image-receiving sheet, a proposal using a support made of coated paper in which a cast coat layer containing a specific pigment is formed on a base paper from the viewpoint of improving the glossiness and non-blister property of an image (Patent Document 1) See), a proposal using a coated paper coated with a coating containing an electron beam curable resin on a base material such as a base paper (see Patent Document 2), and a support made of a base paper soaking the resin of the toner image receiving layer There have been proposals (see Patent Document 3).
However, in the electrophotographic image receiving sheets of Patent Documents 1 and 2, when a toner image is formed, the embedding of the toner becomes insufficient, and the unevenness of the uneven portion between the portion with and without the toner is large. May occur and the planarity may be inferior. On the other hand, in Patent Document 3, there is a disclosure of relief evaluation and it can be seen that it is excellent in non-relief properties, but there is no disclosure about non-blister properties, water resistance, adhesion resistance, etc., and the degree of image quality is unknown. there were.

Further, Patent Document 4 proposes an electrophotographic image-receiving sheet in which a polymer coating layer is provided on both sides of a base paper to improve water resistance and image quality, but there is no disclosure of non-relief property or adhesion resistance. Since the base paper is used for the base material, there is a possibility that the non-relief property cannot be improved.
Also, a heat-sensitive recording material using a white plastic film as a support (see Patent Document 5), an ink jet recording material using a support provided with a polymer coating layer on both sides of a base paper or a white film (see Patent Documents 6 and 7). However, there is no disclosure of an electrophotographic image-receiving sheet, and there is no disclosure of flatness or non-relief properties.
Patent Document 8 proposes a support using a base paper or a plastic film, a support using a coated paper obtained by coating a resin on a plastic film, or a laminate using a base paper laminated with a resin. However, the proposal of laminating the resin on the plastic film is not disclosed, and the non-blister property is disclosed, but the non-relief property, the adhesion resistance and the like are not disclosed.

  Therefore, high-quality images with polymer coating layers on both sides of the plastic film, excellent flatness and gloss after image formation, no blisters and relief, excellent water resistance and adhesion resistance, and excellent texture A support for an image recording material capable of recording the above and a method for producing the same have not yet been obtained, and it is desired to provide them promptly.

JP-A-5-19522 JP-A-5-241364 JP 2003-5419 A Japanese Patent Laid-Open No. 8-21645 JP-A-5-58029 JP-A-8-174992 JP 2001-1632 A JP 2004-191602 A

  An object of the present invention is to solve the conventional problems and achieve the following objects. That is, the present invention is an electrophotographic image-receiving sheet that is excellent in flatness and gloss after image formation, has no blisters and reliefs, has excellent water resistance and adhesion resistance, and can record high-quality images with excellent texture. And an image forming method using the electrophotographic image-receiving sheet.

Means for solving the problems are as follows. That is,
<1> A support having at least one polymer coating layer on both sides of a white plastic film containing a white pigment, and at least one selected from an aromatic polyester resin and an acrylic resin on the support And a toner image-receiving layer.
<2> The electrophotographic image-receiving sheet according to <1>, wherein the white plastic film is at least one selected from a polyester resin film and a polypropylene resin film.
<3> The electrophotographic image-receiving sheet according to any one of <1> to <2>, wherein the white plastic film has a thickness of 20 to 300 μm.
<4> The electrophotographic image-receiving sheet according to any one of <1> to <3>, wherein the white plastic film has a whiteness of 80 to 100%.
<5> The electrophotographic image-receiving sheet according to any one of <1> to <4>, wherein the white pigment content is 1 to 40% by mass.
<6> The above <1> to <5>, wherein the polymer coating layer on the surface on which the toner image-receiving layer of the white plastic film is provided contains 50% by mass or more of low density polyethylene resin having an average density of less than 0.93 g / cm ³ . The electrophotographic image-receiving sheet according to any one of the above.
<7> The electrophotography according to any one of <1> to <5>, wherein the polymer coating layer on the surface on which the toner image-receiving layer of the white plastic film is provided contains 5 to 60% by mass of an amorphous polypropylene resin. This is an image receiving sheet.

<8> A toner image forming step for forming a toner image on the electrophotographic image-receiving sheet according to any one of <1> to <7>, and a surface of the toner image formed by the toner image forming step is smoothed And an image surface smoothing and fixing step.
<9> In the image surface smoothing and fixing step, the toner image is heated and pressed using an image surface smoothing and fixing processor having a heating and pressing member, a belt member, and a cooling device, and then cooled and peeled. 8>.
<10> The image forming method according to <9>, wherein the belt member has a fluorocarbonsiloxane rubber-containing layer formed on a belt support.
<11> The image forming method according to <9>, wherein the belt member includes a silicone rubber-containing layer formed on a belt support and a fluorocarbonsiloxane rubber-containing layer formed on a surface of the silicone rubber-containing layer.
<12> The image forming method according to any one of <10> to <11>, wherein the fluorocarbonsiloxane rubber in the fluorocarbonsiloxane rubber-containing layer has at least one of a perfluoroalkyl ether group and a perfluoroalkyl group in the main chain. It is.

  The electrophotographic image-receiving sheet of the present invention is a support having at least one polymer coating layer on both sides of a white plastic film, and at least one selected from an aromatic polyester resin and an acrylic resin on the support. A toner image-receiving layer containing at least. Thereby, it is possible to provide an electrophotographic image-receiving sheet that is excellent in flatness and glossiness, has no blisters and reliefs, is excellent in water resistance and adhesion resistance, and can record a high-quality image excellent in texture.

  The image forming method of the present invention comprises a toner image forming step for forming a toner image on the electrophotographic image receiving sheet of the present invention, and an image surface smoothing and fixing for smoothing the surface of the toner image formed by the toner image forming step. Process. As a result, it is excellent in flatness and gloss, has no blisters and reliefs, is excellent in water resistance and adhesion resistance, can record high quality images with excellent texture, and is suitable for an electrophotographic image receiving sheet. Can provide.

  According to the present invention, it is possible to solve the conventional problems, excellent in flatness and gloss after image formation, no blisters and reliefs, excellent in water resistance and adhesion resistance, and excellent in texture. An electrophotographic image-receiving sheet that can be recorded and an image forming method using the electrophotographic image-receiving sheet can be provided.

(Electrophotographic image-receiving sheet)
The electrophotographic image-receiving sheet of the present invention has at least a support and a toner image-receiving layer on the support, and other layers appropriately selected as necessary, such as a surface protective layer and a back layer. An intermediate layer, an undercoat layer, a cushion layer, a charge control (prevention) layer, a reflection layer, a color control layer, a storage stability improving layer, an adhesion prevention layer, an anti-curl layer, and a smoothing layer. Each of these layers may have a single layer structure or a laminated structure.

[Support]
The support has at least one polymer coating layer on both sides of a white plastic film.

<White plastic film>
There is no restriction | limiting in particular as said white plastic film, According to the objective, it can select suitably, What formed the synthetic resin in the sheet form etc. are mentioned, For example, a polypropylene resin film, a stretched polyethylene resin film, a stretched polypropylene, etc. Examples include resin film, polyester resin film, stretched polyester resin film, nylon resin film, cellulose ester resin film such as cellulose acetate and cellulose acetate butyrate, polysulfone resin film, polyimide resin film, polyamide resin film, etc. A stretched polyester resin film and a stretched polypropylene resin film are preferable.
The method for producing the white plastic film is not particularly limited and may be appropriately selected depending on the intended purpose. A method for containing a white pigment in the resin, a method for applying a white pigment on the surface of the resin film, a resin Examples thereof include a method of containing microvoids inside. These methods may be used individually by 1 type, and may combine 2 or more types.
As thickness of the said white plastic film, 20-300 micrometers is preferable and 50-230 micrometers is especially preferable. If the thickness is less than 20 μm, the rigidity of the electrophotographic image-receiving sheet may be reduced, causing curling problems. If the thickness exceeds 300 μm, the electrophotographic image-receiving sheet may be poorly conveyed during image formation. Sometimes.

<White pigment>
The white pigment is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include titanium dioxide, calcium carbonate, zinc oxide, zinc sulfide, barium sulfate, calcium silicate, talc, and kaolin. . Among these, titanium dioxide is preferable, and the titanium dioxide may be either anatase type or rutile type.
As content of the said white pigment, 1-40 mass% is preferable, and 5-20 mass% is especially preferable. When the content is less than 1% by mass, the white plastic film may have too low whiteness, which may make it difficult to form a clear image. May occur.
In addition, a colored pigment, a fluorescent whitening agent, an antioxidant and the like as shown in a toner image receiving layer described later may be further added to the white plastic film.
The whiteness of the white plastic film formed by including the white pigment and other additives is preferably 80 to 100%, particularly preferably 85 to 100%. If the whiteness is less than 80%, whiteness of the white plastic film is too low, and it may be difficult to form a clear image.

<Microvoid>
Microvoids can be easily contained in the resin film by forming a large amount of fine bubbles including a gas that totally reflects incident visible light in the resin film. The diameter of the microvoid is preferably 10 μm or less from the viewpoint of improving whiteness.
As a method for forming the microvoids in the resin, for example, it can be easily formed by biaxially stretching a thermoplastic resin such as a polypropylene resin. The thermoplastic resin can be easily manufactured by mixing an inorganic filler, a dispersant, a heat resistance improver, or the like. The inorganic filler is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include calcium carbonate, talc, clay, silica, titanium oxide, and the like. The whiteness of the film can be improved. Moreover, by containing a microvoid, the addition amount of the said inorganic filler can be decreased compared with the white plastic film containing the said white pigment.
Examples of the dispersing agent include diphenylsilane diol, molecular chain terminal hydroxyl group-blocked dimethylpolysiloxane having a low polymerization degree, and hexamethyldisilazane. Examples of the heat resistance improver include ferrous oxide, ferric oxide, cerium oxide, and iron octylate.
Another microvoid formation method can be easily performed by polymerizing the resin together with a foaming agent or by melt-kneading. The foaming agent is not particularly limited and may be appropriately selected depending on the intended purpose. Zid, paratoluenesulfonylacetone hydrazone, hydrazodicarbonamide, and the like.

<Polymer coating layer>
The polymer coating layer is provided on at least one layer on both sides of the white plastic film. As a result, it is possible to obtain a support that is excellent in flatness and glossiness, can prevent the generation of blisters and reliefs, has excellent water resistance and adhesion resistance, and can record high-quality images with excellent texture.

  As thickness of the said polymer coating layer, 2-50 micrometers is preferable and 6-30 micrometers is more preferable. When the thickness is less than 2 μm, the non-relief property may be lowered, and when it exceeds 50 μm, the productivity may be lowered due to the restriction of the melt discharge amount of the resin.

The polymer coating layer is not particularly limited and can be appropriately selected according to the purpose.
A polyolefin resin is preferred.
The polymer coating layer made of polyolefin resin is generally formed using a low density polyethylene resin, but in order to improve the heat resistance of the support, polypropylene resin, a blend of polypropylene resin and polyethylene resin, high density It is preferable to use a polyethylene resin, a blend of a high density polyethylene resin and a low density polyethylene resin, or the like. In particular, it is most preferable to use a blend of a high-density polyethylene resin and a low-density polyethylene resin from the viewpoints of cost, suitability for lamination, and the like.
The high-density polyethylene resin and the low-density polyethylene resin have a blend ratio (mass ratio) of preferably 1/9 to 9/1, more preferably 2/8 to 8/2, and 3/7 to 7/3. Further preferred. When the polymer coating layer is formed on both sides of the white plastic film, the back surface of the white plastic film is formed using, for example, a high density polyethylene resin or a blend of a high density polyethylene resin and a low density polyethylene resin. preferable. The molecular weight of the polyethylene resin is not particularly limited, but the melt index is between 1.0 and 40 g / 10 minutes for both high-density polyethylene resin and low-density polyethylene resin, and is suitable for extrusion. Those having the following are preferred.

Among the polyolefin resins, an embodiment containing 50% by mass or more of low density polyethylene resin having an average density of less than 0.93 g / cm ³ from the viewpoint of non-relief, The aspect containing 60 mass% etc. are preferable.
In the embodiment containing the low density polyethylene resin having an average density of less than 0.93 g / cm ³ , the content of the low density polyethylene resin is preferably 50% by mass or more, particularly preferably 65% by mass or more. When the content is less than 50% by mass, the non-relief property may be deteriorated.
In the aspect containing the amorphous polypropylene resin, the content of the amorphous polypropylene resin is preferably 5 to 60% by mass, particularly preferably 10 to 40% by mass. When the content is less than 5% by mass, the non-relief property may be deteriorated, and when it exceeds 60% by mass, the adhesion resistance may be deteriorated.

The polymer coating layer may be treated to give white reflectivity. As such a processing method, for example, a method of blending the pigment such as titanium dioxide in these sheets or films can be mentioned. The content of the polymer coating layer such as titanium dioxide is preferably 5 to 30% by mass.
The polymer coating layer may contain any one of an organic pigment other than the titanium dioxide and an inorganic pigment.
The organic pigment is not particularly limited and may be appropriately selected from known ones according to the purpose. Examples thereof include ultramarine blue, ceria blue, phthalocyanine blue, cobalt violet, fast violet, and manganese violet. .
There is no restriction | limiting in particular as said inorganic pigment, According to the objective, it can select suitably according to the objective, For example, a calcium carbonate, a talc, a stearamide, a zinc stearate etc. are mentioned.

  The method for forming the polymer coating layer is not particularly limited and may be appropriately selected depending on the purpose. Usually, a laminating method, a sequential laminating method, or a single block type such as a foot block type, a multi-manifold type, or a multi-slot type may be used. It is formed by coating by a layer or multilayer extrusion die, a laminating method using a laminator or the like, or a coextrusion coating method in which multiple layers are extrusion coated simultaneously. There is no restriction | limiting in particular as a shape of the die | dye for the said single layer or multilayer extrusion, According to the objective, it can select suitably, For example, a T die, a coat hanger die, etc. are mentioned suitably.

  The thickness of the support is preferably 25 μm to 300 μm, more preferably 50 μm to 260 μm, and still more preferably 75 μm to 220 μm. Various stiffnesses can be used according to the purpose, and the support for a photographic image receiving sheet for electrophotography is close to a support for color silver halide photography. Those are preferred.

[Toner image receiving layer]
The toner image receiving layer is a toner image receiving layer for receiving color toner or black toner and forming an image. The toner image-receiving layer has a function of receiving toner that forms an image from a developing drum or an intermediate transfer member by (static) electricity, pressure, or the like in a transfer process, and fixing it by heat, pressure, or the like in a fixing process. Have

The toner image-receiving layer is preferably a low-transparency toner image-receiving layer having a light transmittance of 78% or less in view of making the electrophotographic image sheet of the present invention feel close to a photograph, and the light transmittance is 73%. The following is more preferable, and 72% or less is still more preferable.
The light transmittance can be measured by separately forming a coating film having the same thickness on a polyethylene terephthalate film (100 μm) and using the direct reading haze meter (Suga Test Instruments HGM-2DP). .

  The toner image-receiving layer contains at least one selected from water-dispersible aromatic polyester resins and acrylic resins, and if necessary, other thermoplastic resins, and further the thermodynamic characteristics of the toner image-receiving layer. Various additives that are added for the purpose of improving the properties, for example, release agents, plasticizers, colorants, fillers, crosslinking agents, charge control agents, emulsifiers, dispersants, and the like.

-Aromatic polyester resin-
There is no restriction | limiting in particular as said aromatic polyester resin, According to the objective, it can select suitably. The polyester resin is produced by condensation polymerization of an acid component and an alcohol component. The acid component is not particularly limited and may be appropriately selected depending on the intended purpose. For example, maleic acid, fumaric acid, citraconic acid, itaconic acid, glutaconic acid, phthalic acid, terephthalic acid, isophthalic acid, succinic acid , Adipic acid, sebacic acid, azelaic acid, malonic acid, n-dodecenyl succinic acid, isododecenyl succinic acid, n-dodecyl succinic acid, isododecyl succinic acid, n-octenyl succinic acid, n-octyl succinic acid, isooctenyl succinic acid , Isooctyl succinic acid, trimellitic acid, pyromellitic acid, acid anhydrides thereof, or lower alkyl esters thereof.
There is no restriction | limiting in particular as said alcohol component, According to the objective, it can select suitably, For example, bivalent alcohol is preferable. Examples of the aliphatic diol include ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, 1,4-butanediol, neopentyl glycol, 1,4-butenediol, , 5-pentanediol, 1,6-hexanediol, 1,4-cyclohexanedimethanol, dipropylene glycol, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, and the like. Examples of the alkylene oxide adduct of bisphenol A include polyoxypropylene (2.2) -2,2-bis (4-hydroxyphenyl) propane and polyoxypropylene (3.3) -2,2-bis. (4-hydroxyphenyl) propane, polyoxyethylene (2.0) -2,2-bis (4-hydroxyphenyl) propane, polyoxypropylene (2.0) -polyoxyethylene (2.0) -2, Examples thereof include 2-bis (4-hydroxyphenyl) propane, polyoxypropylene (6) -2,2-bis (4-hydroxyphenyl) propane, and the like.

-Acrylic resin-
There is no restriction | limiting in particular as said acrylic resin, According to the objective, it can select suitably, For example, polyacrylic acid or its ester, polymethacrylic acid or its ester, polyacrylonitrile, polyacrylamide etc. are mentioned. .
Examples of the esters of polyacrylic acid include homopolymers and multi-component copolymers of esters of acrylic acid. Examples of the ester of acrylic acid include methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, dodecyl acrylate, n-octyl acrylate, 2-ethylhexyl acrylate, 2-chloroethyl acrylate, And phenyl acrylate, methyl α-chloroacrylate, and the like.
Examples of the polymethacrylic acid esters include homopolymers and multi-component copolymers of methacrylic acid esters. Examples of the methacrylic acid ester include methyl methacrylate, ethyl methacrylate, and butyl methacrylate.

-Other thermoplastic resins-
There is no restriction | limiting in particular as said thermoplastic resin, According to the objective, it can select suitably, (1) Polyolefin-type resin, (2) Polystyrene-type resin, (3) Polyvinyl acetate or its derivative (s), (4) Examples thereof include polyamide resins, (5) polycarbonate resins, (6) polyether resins (or acetal resins), and (7) other resins. These may be used individually by 1 type and may use 2 or more types together. Among these, a styrene resin having a large cohesive energy is particularly preferably used from the viewpoint of embedding toner.

Examples of the polyolefin-based resin (1) include polyolefin resins such as polyethylene and polypropylene resins, and copolymer resins of olefins such as ethylene and propylene and other vinyl monomers. Examples of the copolymer resin of the olefin and another vinyl monomer include an ethylene-vinyl acetate copolymer and an ionomer resin that is a copolymer of acrylic acid or methacrylic acid. Examples of the polyolefin resin derivative include chlorinated polyethylene and chlorosulfonated polyethylene.
Examples of the polystyrene-based resin (2) include polystyrene resin, styrene-isobutylene copolymer, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), and polystyrene-anhydrous. A maleic acid resin etc. are mentioned.
Examples of the polyvinyl acetate or derivative thereof (3) include polyvinyl acetate, polyvinyl alcohol obtained by saponifying polyvinyl acetate, and polyvinyl alcohol as an aldehyde (for example, formaldehyde, acetaldehyde, butyraldehyde, etc.). And polyvinyl acetal resin obtained by reaction.
The polyamide-based resin (4) is a polycondensate of diamine and dibasic acid, and examples thereof include 6-nylon and 6,6-nylon.
The polycarbonate resin (5) is generally a polycarbonate obtained from bisphenol A and phosgene.
Examples of the polyether resin (or acetal resin) of (6) include polyether resins such as polyethylene oxide and polypropylene oxide, and acetal resins such as polyoxymethylene as a ring-opening polymerization system.
Examples of the other resin (7) include polyaddition polyurethane resins.

  The thermoplastic resin is preferably one that can satisfy the following properties of the toner image-receiving layer with the toner image-receiving layer formed, and more preferably one that can satisfy the properties of the toner-image-receiving layer described later even with the resin alone. It is also preferable to use two or more resins having different physical properties of the toner image-receiving layer in combination.

  As the thermoplastic resin, those having a larger molecular weight than the thermoplastic resin used in the toner are preferable. However, the molecular weight described above is not always preferable depending on the relationship between the thermodynamic characteristics of the thermoplastic resin used in the toner and the thermoplastic resin in the toner image receiving layer. For example, when the softening temperature of the thermoplastic resin in the toner image receiving layer is higher than the thermoplastic resin used in the toner, the molecular weight is the same or the thermoplastic resin in the toner image receiving layer is smaller. It may be preferable.

It is also preferable to use a mixture of resins having the same composition and different average molecular weights as the thermoplastic resin of the toner image-receiving layer. Further, as the relationship with the molecular weight of the thermoplastic resin used in the toner, the relationship disclosed in JP-A-8-334915 is preferable.
The molecular weight distribution of the thermoplastic resin in the toner image-receiving layer is preferably wider than the molecular weight distribution of the thermoplastic resin used in the toner.
As the thermoplastic resin of the toner image receiving layer, JP-A-5-127413, JP-A-8-194394, JP-A-8-334915, JP-A-8-334916, JP-A-9-171265. Those satisfying the physical properties disclosed in JP-A-10-221877 are preferred.

  The thermoplastic resin for the toner image-receiving layer is excellent in environmental suitability and work suitability because (i) the organic solvent is not discharged in the coating and drying step. (Ii) Many release agents such as wax are difficult to dissolve in a solvent at room temperature, and are often dispersed in a solvent (water, organic solvent) in advance. In addition, the water dispersion form is more stable and more suitable for the manufacturing process. Furthermore, water-dispersible polymers and water-soluble coatings can be obtained because water-based coating is more likely to cause bleeding of the wax on the surface during coating and drying, and the effects of a release agent (offset resistance, adhesion resistance, etc.) can be easily obtained. A water-based resin such as a polymer is preferably used.

  The water-based resin is not particularly limited in terms of its composition, bond structure, molecular structure, molecular weight, molecular weight distribution, form, etc., as long as it is either a water-dispersible polymer or a water-soluble polymer. Examples of the water-based group of the polymer include a sulfonic acid group, a hydroxyl group, a carboxylic acid group, an amino group, an amide group, and an ether group.

Examples of the water-dispersible polymer include resins, emulsions, copolymers and mixtures of the aromatic polyester resin, the acrylic resin, and the thermoplastic resins (1) to (7) dispersed in water. , And a cation-modified product, and may be used alone or in combination of two or more.
As the water-dispersible polymer, an appropriately synthesized product or a commercially available product may be used. Examples of the commercially available products include polyester-based water-dispersible polymers such as Vironal series manufactured by Toyobo Co., Ltd., Pesresin A series manufactured by Takamatsu Yushi Co., Ltd., Tufton UE series manufactured by Kao Corporation, Nippon Synthetic Chemical Co., Ltd. Polyester WR series manufactured by Kogyo Co., Ltd., Eritel series manufactured by Unitika Ltd., and the like. Examples of the acrylic water-dispersible polymer include Hiros XE, KE, PE series manufactured by Seiko Chemical Industry Co., Ltd. and Jurimer ET series manufactured by Nippon Pure Chemical Co., Ltd.

The water dispersible emulsion is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a water dispersible polyurethane emulsion, a water dispersible polyester emulsion, a chloroprene emulsion, a styrene-butadiene emulsion, a nitrile- Butadiene emulsion, butadiene emulsion, vinyl chloride emulsion, vinylpyridine-styrene-butadiene emulsion, polybutene emulsion, polyethylene emulsion, vinyl acetate emulsion, ethylene-vinyl acetate emulsion, vinylidene chloride emulsion, methyl methacrylate Examples thereof include butadiene-based emulsions. Among these, a water dispersible polyester emulsion is particularly preferable.
The water-dispersible polyester emulsion is preferably a self-dispersing water-based polyester emulsion, and among them, a carboxyl group-containing self-dispersing water-based polyester resin emulsion is particularly preferable. Here, the self-dispersing aqueous polyester emulsion means an aqueous emulsion containing a polyester resin that can be self-dispersed in an aqueous solvent without using an emulsifier. The carboxyl group-containing self-dispersing aqueous polyester resin emulsion means an aqueous emulsion containing a polyester resin that contains a carboxyl group as a hydrophilic group and can be self-dispersed in an aqueous solvent.

The self-dispersing water-dispersible polyester emulsion preferably satisfies the following characteristics (1) to (4). Since this is a self-dispersion type that does not use a surfactant, it has low hygroscopicity even in a high humidity atmosphere, and there is little decrease in the softening point due to moisture, and it is possible to suppress occurrence of offset at the time of fixing and adhesion failure between sheets at the time of storage. Moreover, since it is water-based, it is excellent in environmental performance and workability. In addition, since a polyester resin with a high cohesive energy and a molecular structure is used, it has a sufficient hardness in the storage environment, but it becomes a low elasticity (low viscosity) molten state in the electrophotographic fixing process, and the toner receives an image. Sufficient image quality can be achieved by embedding in the layer.
(1) The number average molecular weight (Mn) is preferably 5,000 to 10,000, and more preferably 5,000 to 7,000.
(2) The molecular weight distribution (weight average molecular weight / number average molecular weight) is preferably 4 or less, and more preferably Mw / Mn ≦ 3.
(3) The glass transition temperature (Tg) is preferably 40 to 100 ° C, and more preferably 50 to 80 ° C.
(4) The volume average particle diameter is preferably 20 to 200 nm, more preferably 40 to 150 nm.
The content of the water-dispersible emulsion in the toner image-receiving layer is preferably 10 to 90% by mass, and more preferably 10 to 70% by mass.

The water-soluble polymer is not particularly limited as long as the weight average molecular weight (Mw) is 400,000 or less, and can be appropriately selected according to the purpose. For example, polyvinyl alcohol, carboxy-modified polyvinyl alcohol, carboxymethyl cellulose, hydroxyethyl cellulose, cellulose sulfate, polyethylene oxide, gelatin, cationized starch, casein, sodium polyacrylate, styrene-maleic anhydride copolymer Examples thereof include sodium combined and sodium polystyrene sulfonate. Among these, polyethylene oxide is preferable.
Commercially available products of the water-soluble polymer include water-soluble polyesters plus various coats manufactured by Kureai Chemical Industry Co., Ltd., Finetex ES series manufactured by Dainippon Ink and Chemicals, and Nippon Pure Chemical Co., Ltd. as water-soluble acrylic. Jurimer AT series, Dainippon Ink and Chemicals Finetex 6161, K-96; Seiko Chemical Industry Co., Ltd. high loss NL-1189, BH-997L, etc. are mentioned.
Examples of the water-soluble polymer include Research Disclosure No. 17,643, page 26, Research Disclosure No. 18,716, page 651, Research Disclosure No. 307,105, pages 873-874, and JP-A 64- The thing described in 13546 gazette is mentioned.

The content of the water-soluble polymer in the toner image-receiving layer is not particularly limited and can be appropriately selected according to the purpose, and is preferably 0.5 to ² g / m ² .

Although the said thermoplastic resin can also be used together with another polymer material, in that case, generally it is used so that content may become larger than another polymer material.
The content of the thermoplastic resin for the toner image-receiving layer in the toner image-receiving layer is preferably 10% by mass or more, more preferably 30% by mass or more, still more preferably 50% by mass or more, and particularly preferably 50 to 90% by mass. .

-Release agent-
The release agent is blended in the toner image receiving layer in order to prevent the toner image receiving layer from being offset. The release agent used in the present invention is heated and melted at the fixing temperature, deposited on the surface of the toner image-receiving layer, unevenly distributed on the surface of the toner image-receiving layer, and further cooled and solidified to form the surface of the toner image-receiving layer. The type of the release agent material is not particularly limited as long as it forms a layer of the release agent material, and can be appropriately selected according to the purpose.
Examples of the release agent include at least one selected from a silicone compound, a fluorine compound, a wax, and a matting agent.

  As the mold release agent, for example, compounds described in Sachishobo "Revised Wax Properties and Applications", a silicone handbook published by Nikkan Kogyo Shimbun, Ltd. can be used. Also, Japanese Patent Publication No. 59-38581, Japanese Patent Publication No. 4-32380, Japanese Patent No. 2838498, Japanese Patent No. 2949558, Japanese Patent Application Laid-Open No. 50-117433, Japanese Patent Application Laid-Open No. 52-52640, Japanese Patent Application Laid-Open No. 57-148755, JP 61-62056, JP 61-62057, JP 61-118760, JP 2-42451, JP 3-41465, JP 4-212175, JP 4-214570. JP-A-4-263267, JP-A-5-34966, JP-A-5-119514, JP-A-6-59502, JP-A-6-161150, JP-A-6-175396, JP-A-6-219040. JP-A-6-230600, JP-A-6-295093, JP-A-7-36210, JP-A-7-43940, JP-A-7-56387. JP-A-7-56390, JP-A-7-64335, JP-A-7-199681, JP-A-7-223362, JP-A-7-287413, JP-A-8-184992, JP-A-8-227180, Special Kaihei 8-248671, JP-A-8-248799, JP-A-8-248801, JP-A-8-278663, JP-A-9-152727, JP-A-9-160278, JP-A-9-185181, JP-A-9-185181 No. 9-319139, JP-A-9-319143, JP-A-10-20549, JP-A-10-48889, JP-A-10-198069, JP-A-10-207116, JP-A-11-2917, JP-A-11-11. -44969, JP-A-11-65156, JP-A-11-73049, JP-A-11-194542 Silicone compound used in the toner, fluorine compounds or waxes can also be preferably used. Further, a plurality of these compounds can be used in combination.

  There is no restriction | limiting in particular as said silicone type compound, According to the objective, it can select suitably, For example, silicone oil, silicone rubber, silicone microparticles | fine-particles, a silicone modified resin, a reactive silicone compound, etc. are mentioned.

The silicone oil is not particularly limited and may be appropriately selected depending on the intended purpose.For example, non-modified silicone oil, amino-modified silicone oil, carboxy-modified silicone oil, carbinol-modified silicone oil, vinyl-modified silicone oil, Examples thereof include epoxy-modified silicone oil, polyether-modified silicone oil, silanol-modified silicone oil, methacryl-modified silicone oil, mercapto-modified silicone oil, alcohol-modified silicone oil, alkyl-modified silicone oil, and fluorine-modified silicone oil.
The silicone-modified resin is not particularly limited and may be appropriately selected depending on the intended purpose.For example, olefin resin, polyester resin, vinyl resin, polyamide resin, cellulose resin, phenoxy resin, vinyl chloride-vinyl acetate resin, Examples thereof include urethane resins, acrylic resins, styrene-acrylic resins, or resins obtained by modifying these copolymer resins with silicone.

  The fluorine compound is not particularly limited and may be appropriately selected depending on the purpose. For example, fluorine oil, fluorine rubber, fluorine-modified resin, fluorine sulfonic acid compound, fluorosulfonic acid, fluoric acid compound or a salt thereof, And inorganic fluorides.

The wax can be roughly classified into natural wax and synthetic wax.
The natural wax is preferably at least one selected from plant waxes, animal waxes, mineral waxes and petroleum waxes, and among these, plant waxes are particularly preferable. The natural wax is particularly preferably a water-dispersed wax from the viewpoint of compatibility when an aqueous resin is used as the polymer for the toner image-receiving layer.

There is no restriction | limiting in particular as said plant-type wax, It can select suitably from well-known things, A commercial item may be sufficient and what was synthesize | combined suitably may be sufficient. Examples of the plant wax include carnauba wax, castor oil, rapeseed oil, soybean oil, wood wax, cotton wax, rice wax, sugarcane wax, candelilla wax, Japan wax, jojoba oil, and the like.
Examples of the commercially available carnauba wax include EMUSTAR-0413 manufactured by Nippon Seiki Co., Ltd., and Cellosol 524 manufactured by Chukyo Yushi Co., Ltd. As a commercial item of the said castor oil, the refined castor oil by Ito Oil Co., Ltd., etc. are mentioned.
Among these, in particular, it has an excellent offset resistance, adhesion resistance, paper permeability, glossiness, is resistant to cracking, and can provide an electrophotographic image-receiving sheet capable of forming a high-quality image. Is particularly preferably a carnauba wax having a temperature of 70 to 95 ° C.

  There is no restriction | limiting in particular as said animal-type wax, It can select suitably from well-known things, For example, beeswax, lanolin, spermaceti, stew wax (whale oil), wool wax, etc. are mentioned.

There is no restriction | limiting in particular as said mineral-type wax, It can select suitably from well-known things, A commercial item may be sufficient and what was synthesize | combined suitably may be sufficient. Examples thereof include montan wax, montan ester wax, ozokerite, ceresin and the like.
Among these, in particular, it has an excellent offset resistance, adhesion resistance, paper permeability, glossiness, is resistant to cracking, and can provide an electrophotographic image-receiving sheet capable of forming a high-quality image. Is particularly preferably a montan wax having a temperature of 70 to 95 ° C.

  There is no restriction | limiting in particular as said petroleum wax, It can select suitably from well-known things, A commercial item may be sufficient and what was synthesize | combined suitably may be sufficient. Examples thereof include paraffin wax, microcrystalline wax, petrolatum, and the like.

The content in the toner image-receiving layer of the natural wax is preferably ^{0.1~4g / m 2, 0.2~2g / m} 2 is more preferable.
When the content is less than 0.1 g / m ² , offset resistance and adhesion resistance may be particularly insufficient. When the content exceeds 4 g / m ² , the amount of wax is excessive, and an image is formed. May have poor image quality.

  The melting point (° C.) of the natural wax is particularly preferably 70 to 95 ° C. and more preferably 75 to 90 ° C. from the viewpoint of offset resistance and paper passing.

  The synthetic wax is classified into synthetic hydrocarbons, modified waxes, hydrogenated waxes, and other oil-based synthetic waxes. These waxes are preferably water-dispersed waxes in terms of compatibility when a water-based thermoplastic resin is used as the thermoplastic resin of the toner image-receiving layer.

Examples of the synthetic hydrocarbon include Fischer-Tropsch wax and polyethylene wax.
Examples of the oil-based synthetic wax include acid amide compounds (such as stearamide) and acid imide compounds (such as phthalic anhydride imide).

  The modified wax is not particularly limited and may be appropriately selected depending on the intended purpose. For example, amine-modified wax, acrylic acid-modified wax, fluorine-modified wax, olefin-modified wax, urethane-type wax, alcohol-type wax, etc. Is mentioned.

  The hydrogenated wax is not particularly limited and may be appropriately selected depending on the intended purpose.For example, hydrogenated castor oil, castor oil derivative, stearic acid, lauric acid, myristic acid, palmitic acid, behenic acid, sebacic acid, Examples include undecylenic acid, heptylic acid, maleic acid, highly maleated oil, and the like.

The melting point (° C.) of the release agent is preferably 70 to 95 ° C., and more preferably 75 to 90 ° C., particularly in terms of offset resistance and paper passing properties.
As the release agent added to the toner image-receiving layer, derivatives, oxides, purified products, and mixtures thereof can also be used. Moreover, these may have a reactive substituent.

The content of the release agent is preferably 0.1 to 10% by mass, more preferably 0.3 to 8.0% by mass, and more preferably 0.5 to 5.0 based on the mass of the toner image-receiving layer. More preferred is mass%.
When the content is less than 0.1% by mass, the offset resistance and the adhesion resistance may be insufficient. When the content exceeds 10% by mass, the amount of the release agent is excessively large. Image quality may be degraded.

-Plasticizer-
There is no restriction | limiting in particular as said plasticizer, The plasticizer for well-known resin can be suitably selected according to the objective. The plasticizer has a function of adjusting the flow or softening of the toner image receiving layer by heat or pressure when fixing the toner.
Examples of the plasticizer include “Chemical Handbook” (edited by the Chemical Society of Japan, Maruzen), “Plasticizer—its theory and application” (written by Koichi Murai, Koshobo), “Research on plasticizers”, “Research on plasticizers” "Lower" (edited by Polymer Chemistry Association) and "Handbook Rubber / Plastic Compounded Chemicals" (edited by Rubber Digest Co., Ltd.).

Examples of the plasticizer include those described as high-boiling organic solvents and thermal solvents. For example, JP-A-59-83154, JP-A-59-178451, JP-A-59-178453, JP 59-178454, JP 59-178455, JP 59-178457, JP 62-174754, JP 62-245253, JP 61-209444, JP Described in JP-A-61-200538, JP-A-62-2145, JP-A-62-2348, JP-A-62-2247, JP-A-62-136646, JP-A-2-235694, etc. Esters such as phthalates (eg, phthalates, phosphates, fatty acid esters, abietic acid esters, adipic acid esters, sebacic acid esters) Azelaic acid esters, benzoic acid esters, butyric acid esters, epoxidized fatty acid esters, glycolic acid esters, propionic acid esters, trimellitic acid esters, citric acid esters, sulfonic acid esters, carboxylic acid esters Succinic acid esters, maleic acid esters, fumaric acid esters, phthalic acid esters, stearic acid esters, etc.), amides (for example, fatty acid amides, sulfoamides, etc.), ethers, alcohols, lactones , Polyethyleneoxy compounds, and the like.
These plasticizers can be used by mixing with a resin.

Further, as the plasticizer, a relatively low molecular weight polymer can be used. The molecular weight of the plasticizer is preferably lower than the molecular weight of the binder resin to be plasticized, and the molecular weight is preferably 15000 or less, more preferably 5000 or less. In the case of a polymer plasticizer, the polymer is preferably the same type as the binder resin to be plasticized. For example, a low molecular weight polyester is preferable for plasticizing a polyester resin. Furthermore, oligomers can also be used as plasticizers.
In addition to the compounds listed above, commercially available products include, for example, Adekasizer PN-170, PN-1430 (all manufactured by Asahi Denka Kogyo Co., Ltd.), PARAPLEX-G-25, G-30, G-40 (any C.P.HALL), ester gum 8L-JA, ester R-95, pentalin 4851, FK115, 4820, 830, Louisol 28-JA, picorastic A75, picotex LC, crystallx 3085 (all rationalized) Hercules).

The plasticizer reduces stress and strain generated when toner particles are embedded in the toner image-receiving layer (physical strain such as elastic force and viscosity, strain due to material balance such as molecules, binder main chain, and pendant portion). Can be used arbitrarily to alleviate.
The plasticizer may be in a micro-dispersed state in the toner image-receiving layer, in a micro-phase-separated state in a sea-island shape, or in a sufficiently mixed and dissolved state with other components such as a binder. .
The content of the plasticizer in the toner image-receiving layer is preferably 0.001 to 90% by mass, more preferably 0.1 to 60% by mass, and still more preferably 1 to 40% by mass.
The plasticizer adjusts smoothness (improves transportability due to reduced frictional force), improves fixing unit offset (detachment of toner and layers from the fixing unit), adjusts curl balance, and adjusts charging (toner electrostatic image It may be used for purposes such as formation).

-Colorant-
There is no restriction | limiting in particular as said coloring agent, According to the objective, it can select suitably, A fluorescent whitening agent, a white pigment, a colored pigment, dye, etc. are mentioned.
The fluorescent brightening agent is not particularly limited as long as it is a known compound that absorbs in the near ultraviolet region and emits fluorescence at 400 to 500 nm, and can be appropriately selected from known compounds. Preferable examples include compounds described in “The Chemistry of Synthetic Dies”, Volume V, Chapter 8, edited by Veen Rataraman. The fluorescent whitening agent may be a commercially available product, or may be appropriately synthesized. For example, stilbene compounds, coumarin compounds, biphenyl compounds, benzoxazoline compounds, naphthalimide compounds , Pyrazoline compounds, carbostyryl compounds, and the like. Examples of the commercially available products include white fur fur PSN, PHR, HCS, PCS, B (all manufactured by Sumitomo Chemical Co., Ltd.), UVITEX-OB (manufactured by Ciba-Geigy), and the like.

  There is no restriction | limiting in particular as said white pigment, According to the objective, it can select suitably according to the objective, For example, inorganic pigments, such as titanium dioxide and a calcium carbonate, can be used.

The colored pigment is not particularly limited and may be appropriately selected from known ones according to the purpose. For example, various pigments, azo pigments, and many pigments described in JP-A-63-44653. Examples thereof include cyclic pigments, condensed polycyclic pigments, lake pigments, and carbon black.
Examples of the azo pigment include azo lake (for example, Carmine 6B, Red 2B), insoluble azo pigment (for example, monoazo yellow, disazo yellow, pyrazolo orange, vulcan orange), and condensed azo pigment (for example, chromophthal yellow, chromo). Phthared).
Examples of the polycyclic pigment include phthalocyanine pigments such as copper phthalocyanine blue and copper phthalocyanine green.
Examples of the condensed polycyclic pigment include dioxazine pigments (eg, dioxazine violet), isoindolinone pigments (eg, isoindolinone yellow), selenium pigments, perylene pigments, perinone pigments, thioindigo pigments. And pigments.
Examples of the lake pigment include malachite green, rhodamine B, rhodamine G, and Victoria blue B.
Examples of the inorganic pigment include oxide (for example, titanium dioxide, bengara, etc.) sulfate (for example, precipitated barium sulfate), carbonate (for example, precipitated calcium carbonate), and oxalate (for example, water-containing material). Succinate, anhydrous succinate, etc.), metal powder (for example, aluminum powder, bronze powder, zinc dust, chrome lead, bitumen), and the like.
These may be used alone or in combination of two or more.

There is no restriction | limiting in particular as said dye, According to the objective, it can select suitably according to the objective, For example, an anthraquinone type compound, an azo type compound, etc. are mentioned. These may be used alone or in combination of two or more.
Examples of water-insoluble dyes include vat dyes, disperse dyes, and oil-soluble dyes. Examples of the vat dyes include C.I. I. Vat violet 1, C.I. I. Vat violet 2, C.I. I. Vat violet 9, C.I. I. Vat violet 13, C.I. I. Vat violet 21, C.I. I. Vat Blue 1, C.I. I. Vat Blue 3, C.I. I. Vat Blue 4, C.I. I. Vat Blue 6, C.I. I. Vat Blue 14, C.I. I. Vat Blue 20, C.I. I. Vat blue 35 and the like. Examples of the disperse dye include C.I. I. Dispers Violet 1, C.I. I. Disperse Violet 4, C.I. I. Disperse Violet 10, C.I. I. Disperse Blue 3, C.I. I. Disperse Blue 7, C.I. I. Disperse Blue 58, etc. Examples of the oil-soluble dye include C.I. I. Solvent Violet 13, C.I. I. Solvent Violet 14, C.I. I. Solvent Violet 21, C.I. I. Solvent Violet 27, C.I. I. Solvent Blue 11, C.I. I. Solvent Blue 12, C.I. I. Solvent Blue 25, C.I. I. Solvent Blue 55, and the like.
In addition, a colored coupler used in silver salt photography can also be suitably used.

Of the colorant, the content in the toner image-receiving layer is preferably ^{0.1~8g / m 2, 0.5~5g / m} 2 is more preferable.
When the content of the colorant is less than 0.1 g / m ² , the light transmittance in the toner image-receiving layer may be increased. When the content exceeds 8 g / m ² , handling properties such as cracking and adhesion resistance are increased. May be inferior.
Among the colorants, the amount of the pigment added is preferably 40% by mass or less, more preferably 30% by mass or less, and further preferably 20% by mass or less based on the mass of the thermoplastic resin constituting the toner image receiving layer. preferable.

As said filler, an organic or inorganic filler is mentioned, A well-known thing can be used as a reinforcing agent for binder resin, a filler, and a reinforcing material. The filler should be selected with reference to "Handbook Rubber / Plastic Compounding Chemicals" (edited by Rubber Digest Co., Ltd.), "New Edition Plastic Compounding Agent Basics and Applications" (Taiseisha), "Filler Handbook" (Taiseisha), etc. Can do.
Moreover, an inorganic filler or an inorganic pigment can be used as the filler. Examples of the inorganic filler or inorganic pigment include silica, alumina, titanium dioxide, zinc oxide, zirconium oxide, mica-like iron oxide, lead white, lead oxide, cobalt oxide, strontium chromate, molybdenum-based pigment, smectite, magnesium oxide, Examples include calcium oxide, calcium carbonate, mullite, and the like. Among these, silica and alumina are particularly preferable. These may be used alone or in combination of two or more. The filler preferably has a small particle size. If the particle size is large, the surface of the toner image-receiving layer tends to be roughened.

  The silica includes spherical silica and amorphous silica. The silica can be synthesized by a dry method, a wet method, or an airgel method. The surface of the hydrophobic silica particles may be surface-treated with a trimethylsilyl group or silicone. As the silica, colloidal silica is preferable. The silica is preferably porous.

The alumina includes anhydrous alumina and alumina hydrate. As the crystal form of the anhydrous alumina, α, β, γ, δ, ζ, η, θ, κ, ρ, or χ can be used, and alumina hydrate is preferable to anhydrous alumina. As the alumina hydrate, monohydrate or trihydrate can be used. The monohydrate includes pseudo boehmite, boehmite and diaspore. The trihydrate includes dibsite and bayerite. The alumina is preferably porous.
The alumina hydrate can be synthesized by a sol-gel method in which ammonia is added to an aluminum salt solution to precipitate or a method in which an alkali aluminate is hydrolyzed. The anhydrous alumina can be obtained by dehydrating alumina hydrate by heating.

  The amount of the filler added is preferably 5 to 2000 parts by mass with respect to 100 parts by mass of the dry mass of the binder of the toner image receiving layer.

The cross-linking agent can be blended for adjusting the storage stability and thermoplasticity of the toner image-receiving layer. As the crosslinking agent, a compound having two or more known reactive groups in the molecule as the reactive group, such as an epoxy group, an isocyanate group, an aldehyde group, an active halogen group, an active methylene group, an acetylene group, or the like is used.
As the crosslinking agent, a compound having two or more groups capable of forming a bond by a hydrogen bond, an ionic bond, a coordinate bond, or the like can be used.
As the crosslinking agent, for example, known compounds can be used as a coupling agent for resin, a curing agent, a polymerization agent, a polymerization accelerator, a coagulant, a film-forming agent, a film-forming auxiliary, and the like. Examples of the coupling agent include chlorosilanes, vinyl silanes, epoxy silanes, aminosilanes, alkoxyaluminum chelates, titanate coupling agents, etc., and "Handbook Rubber / Plastic Compounding Chemicals" (Rubber Digest Co., Ltd.) Ed) and the like can be used.

The toner image receiving layer preferably contains a charge adjusting agent in order to adjust the transfer or adhesion of the toner or to prevent the toner image receiving layer from being charged and adhered.
The charge control agent is not particularly limited, and various conventionally known charge control agents can be appropriately used according to the purpose. For example, a cationic surfactant, an anionic surfactant, an amphoteric surfactant, In addition to surfactants such as nonionic surfactants, polymer electrolytes, conductive metal oxides, and the like can be used. Specifically, cationic antistatic agents such as quaternary ammonium salts, polyamine derivatives, cation-modified polymethyl methacrylate, and cation-modified polystyrene, anionic antistatic agents such as alkyl phosphates and anionic polymers, fatty acid esters, polyethylene oxide Nonionic antistatic agents such as
In the case where the toner has a negative charge, for example, a cation or a nonion is preferable as the charge adjusting agent blended in the toner image receiving layer.
Examples of the conductive metal oxide include ZnO, TiO ₂ , SnO ₂ , Al ₂ O ₃ , In ₂ O ₃ , SiO ₂ , MgO, BaO, and MoO ₃ . These may be used alone or in combination of two or more. Further, the conductive metal oxide may further contain (doping) a different element, for example, Al, In, etc. with respect to ZnO, Nb, Ta, etc. with respect to TiO ₂ , SnO ₂ . On the other hand, Sb, Nb, a halogen element, etc. can be contained (doping).

-Other additives-
The material that can be used for the toner image-receiving layer may contain various additives for improving the stability of the output image and improving the stability of the toner image-receiving layer itself. Examples of the additive include various known antioxidants, antioxidants, deterioration inhibitors, ozone deterioration inhibitors, ultraviolet absorbers, metal complexes, light stabilizers, preservatives, and fungicides.

  The antioxidant is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include chroman compounds, coumaran compounds, phenol compounds (eg, hindered phenols), hydroquinone derivatives, hindered amine derivatives, spiroindane compounds, Etc. The antioxidant is described in JP-A No. 61-159644.

  There is no restriction | limiting in particular as said anti-aging agent, According to the objective, it can select suitably, For example, it describes in "Handbook rubber and plastic compounding chemicals revised 2nd edition" (1993, Rubber Digest company) p76-121. Can be mentioned.

  There is no restriction | limiting in particular as said ultraviolet absorber, According to the objective, it can select suitably, For example, a benzotriazole compound (refer U.S. Pat. No. 3,533,794), 4-thiazolidone compound (U.S. Pat. No. 3,352,681) And benzophenone compounds (see JP-A No. 46-2784), and UV-absorbing polymers (see JP-A No. 62-260152).

There is no restriction | limiting in particular as said metal complex, According to the objective, it can select suitably, For example, U.S. Pat. No. 4,241,155, U.S. Pat. No. 4,245,018, U.S. Pat. Those described in JP-A-61-88256, JP-A-62-174741, JP-A-63-199248, JP-A-1-75568, and JP-A-1-74272 are suitable. .
Further, ultraviolet absorbers and light stabilizers described in "Handbook Rubber / Plastic Compounding Chemicals Revised 2nd Edition" (1993, Rubber Digest Co., Ltd.) p122 to 137 can also be suitably used.

  Note that, as described above, known photographic additives can be added to the material that can be used for the toner image-receiving layer, if necessary. Examples of the photographic additive include Research Disclosure Magazine (hereinafter abbreviated as RD) No. 17643 (December 1978), RD No. 18716 (November 1979) and RD No. 307105 (November 1989), and the corresponding parts are summarized in the following table.

  The toner image-receiving layer is provided by applying a coating solution containing the toner image-receiving layer thermoplastic resin on the support with a wire coater or the like and drying. The film forming temperature (MFT) of the thermoplastic resin is preferably room temperature or higher for storage before printing, and preferably 100 ° C. or lower for fixing toner particles.

The toner image-receiving layer, the coating weight after drying, for example, preferably ^{1~20g / m 2, 4~15g / m} 2 is more preferable.
The thickness of the toner image-receiving layer is not particularly limited and may be appropriately selected depending on the intended purpose. For example, it is preferably 1/2 or more of the particle diameter of the toner used, and is 1 to 3 times thicker. More specifically, 1-50 micrometers is preferable, 1-30 micrometers is more preferable, 2-20 micrometers is still more preferable, and 5-15 micrometers is especially preferable.

[Physical properties of toner image-receiving layer]
The toner image-receiving layer has a 180 degree peel strength at a fixing temperature with the fixing member of preferably 0.1 N / 25 mm or less, and more preferably 0.041 N / 25 mm or less. The 180 degree peel strength can be measured according to the method described in JIS K6887 using the surface material of the fixing member.
The toner image receiving layer preferably has a high whiteness. The whiteness is preferably 85% or more as measured by the method defined in JIS P 8123. In addition, in the wavelength region of 440 nm to 640 nm, the spectral reflectance is preferably 85% or more, and the difference between the maximum spectral reflectance and the minimum spectral reflectance in the same wavelength region is preferably within 5%. Furthermore, the spectral reflectance is preferably 85% or more in the wavelength region of 400 nm to 700 nm, and the difference between the maximum spectral reflectance and the minimum spectral reflectance in the same wavelength region is more preferably within 5%.
As the whiteness, specifically, in the CIE 1976 (L ^* a ^* b ^* ) color space, the L ^* value is preferably 80 or more, more preferably 85 or more, and still more preferably 90 or more. The white color is preferably as neutral as possible. As a white color, in the L ^* a ^* b ^* space, the value of (a ^* ) ² + (b ^* ) ² is preferably 50 or less, more preferably 18 or less, and still more preferably 5 or less.

The toner image receiving layer preferably has high gloss after image formation. The glossiness is preferably 60 or more, more preferably 75 or more, and still more preferably 90 or more in the entire region from white without toner to black having the maximum density.
However, the glossiness is preferably 110 or less. If it exceeds 110, it becomes like metallic luster, which is not preferable as image quality.
Here, the glossiness can be measured based on, for example, JIS Z8741.

The toner image receiving layer preferably has high smoothness after fixing. As the smoothness, the arithmetic average roughness (Ra) is preferably 3 μm or less, more preferably 1 μm or less, and even more preferably 0.5 μm or less in the entire region from white without toner to black having the maximum density.
Here, the arithmetic mean roughness can be measured based on, for example, JIS B0601, JIS B0651, and JIS B0652.

The toner image-receiving layer preferably has a physical property of one item in the following items, more preferably has a physical property of a plurality of items, and further preferably has a physical property of all items.
(1) Tm (melting temperature) of the toner image-receiving layer is preferably 30 ° C. or higher, and preferably Tm + 20 ° C. or lower of the toner.
(2) The temperature at which the viscosity of the toner image-receiving layer becomes 1 × 10 ⁵ cp is preferably 40 ° C. or higher, and is preferably lower than that of the toner.
(3) The storage elastic modulus (G ′) at the fixing temperature of the toner image-receiving layer is 1 × 10 ² to 1 × 10 ⁵ Pa, and the loss elastic modulus (G ″) is 1 × 10 ² to 1 × 10 ⁵ Pa. preferable.
(4) The loss tangent (G ″ / G ′), which is the ratio of the loss elastic modulus (G ″) at the fixing temperature of the toner image receiving layer and the storage elastic modulus (G ′), is preferably from 0.01 to 10.
(5) The storage elastic modulus (G ′) at the fixing temperature of the toner image-receiving layer is preferably −50 to +2500 with respect to the storage elastic modulus (G ′) at the fixing temperature of the toner.
(6) The inclination angle of the molten toner on the toner image-receiving layer is preferably 50 degrees or less, and more preferably 40 degrees or less.
The toner image-receiving layer satisfies the physical properties disclosed in Japanese Patent No. 2788358, Japanese Patent Application Laid-Open No. 7-248637, Japanese Patent Application Laid-Open No. 8-305067, Japanese Patent Application Laid-Open No. 10-239889, and the like. preferable.

The surface electric resistance of the toner image-receiving layer is preferably in the range of 1 × 10 ⁶ to 1 × 10 ¹⁵ Ω / cm ² (under the condition of 25 ° C.-65% RH).
If the surface resistance is less than 1 × 10 ⁶ Ω / cm ² , the amount of toner when the toner is transferred to the toner image-receiving layer is not sufficient, and the density of the resulting toner image may tend to be low. If it exceeds × 10 ¹⁵ Ω / cm ² , an excessive charge is generated at the time of transfer, the toner is not sufficiently transferred, the density of the image is low, and electrostatic charge is generated during handling of the electrophotographic image receiving sheet. It becomes easy to adhere. Misfeeds, double feeds, discharge marks, toner transfer missing, etc. may occur during copying.
Here, the surface electrical resistance is based on JIS K6911, the sample is conditioned for 8 hours or more in an environment of a temperature of 20 ° C. and a humidity of 65%, and under the same environment, R8340 manufactured by Advantest Corporation is used. It can be obtained by measuring after one minute has passed after energization under the condition of an applied voltage of 100V.

[Other layers]
-Surface protective layer-
The surface protective layer is used for the purpose of protecting the surface of the electrophotographic image-receiving sheet, improving storability, improving handleability, imparting writing properties, improving instrument passability, and imparting anti-offset properties. It can be provided on the surface of the image receiving layer. The surface protective layer may be a single layer or may be composed of two or more layers. In the surface protective layer, various thermoplastic resins, thermosetting resins, and the like can be used as a binder, and it is preferable to use the same type of resin as the toner image receiving layer. However, thermodynamic characteristics, electrostatic characteristics, and the like do not need to be the same as those of the toner image-receiving layer, and can be optimized.

The surface protective layer may contain the various additives described above that can be used for the toner image-receiving layer. In particular, the surface protective layer can be blended with other additives such as a matting agent in addition to the release agent used in the present invention. In addition, as said mat agent, various well-known things are mentioned.
The outermost surface layer in the electrophotographic image-receiving sheet (for example, the surface protective layer when a surface protective layer is formed) preferably has good compatibility with the toner from the viewpoint of fixability. Specifically, the contact angle with the melted toner is preferably, for example, 0 to 40 degrees.

-Back layer-
In the electrophotographic image-receiving sheet, the back layer is provided on the opposite side of the toner image-receiving layer with respect to the support for the purpose of imparting backside output suitability, improving backside output image quality, improving curl balance, and improving device passage. It is preferred that
Although there is no restriction | limiting in particular as a color of the said back layer, When the said electrophotographic image receiving sheet is a double-sided output type image receiving sheet which forms an image also in a back surface, it is preferable that a back layer is also white. The whiteness and the spectral reflectance are preferably 85% or more like the surface.
Further, the back layer may have the same structure as that of the toner image receiving layer for improving the duplex output suitability. Various additives described above can be used for the back layer. As such an additive, it is particularly suitable to add a matting agent, a charge adjusting agent, or the like. The back layer may have a single layer configuration or a stacked configuration of two or more layers.
In order to prevent offset at the time of fixing, when a release oil is used for a fixing roller or the like, the back layer may be oil absorbing.
The thickness of the back layer is usually preferably from 0.1 to 10 μm.

-Adhesion improvement layer, etc.-
The adhesion improving layer is preferably formed for the purpose of improving the adhesion between the support and the toner image receiving layer in the electrophotographic image receiving sheet. The above-mentioned various additives can be blended in the adhesion improving layer, and it is particularly preferable to blend a crosslinking agent. The electrophotographic image-receiving sheet of the present invention preferably further comprises a cushion layer or the like between the adhesion improving layer and the toner image-receiving layer in order to improve toner acceptability.

-Intermediate layer-
The intermediate layer is formed, for example, between the support and the adhesion improving layer, between the adhesion improving layer and the cushion layer, between the cushion layer and the toner image receiving layer, and between the toner image receiving layer and the storage stability improving layer. Can do. Of course, in the case of an electrophotographic image-receiving sheet comprising a support, a toner image receiving layer, and an intermediate layer, the intermediate layer can be present, for example, between the support and the toner image receiving layer.

  The thickness of the electrophotographic image-receiving sheet of the present invention is not particularly limited and may be appropriately selected depending on the intended purpose. For example, 50 to 550 μm is preferable, and 100 to 350 μm is more preferable.

[toner]
The electrophotographic image-receiving sheet of the present invention is used by allowing the toner image-receiving layer to receive toner during printing or copying.
The toner contains at least a binder resin and a colorant, and further contains a release agent and other components as necessary.

-Toner binder resin-
The binder resin is not particularly limited, and can be appropriately selected from those usually used for toner according to the purpose. For example, styrenes such as styrene and parachlorostyrene; vinyl naphthalene, vinyl chloride Vinyl esters such as vinyl bromide, vinyl fluoride, vinyl acetate, vinyl propionate, vinyl benzoate, vinyl butyrate; methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, dodecyl acrylate, Methylene aliphatic carboxylic acid esters such as n-octyl acrylate, 2-chloroethyl acrylate, phenyl acrylate, methyl α-chloroacrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate; acrylonitrile, methacrylonitrile, Biacrylamide such as acrylamide Nitriles; vinyl ethers such as vinyl methyl ether, vinyl ethyl ether, vinyl isobutyl ether; N-vinyl compounds such as N-vinyl pyrrole, N-vinyl carbazole, N-vinyl indole, N-vinyl pyrrolidone; methacrylic acid, acrylic A homopolymer of vinyl monomers such as vinyl carboxylic acids such as acid and cinnamic acid or copolymers thereof, and various polyesters can be used, and various waxes can be used in combination.
Among these resins, it is preferable to use a resin of the same system as that used for the toner image receiving layer.

-Toner colorant-
The colorant is not particularly limited and can be appropriately selected from those used in normal toners according to the purpose. For example, carbon black, chrome yellow, hansa yellow, benzidine yellow, sren yellow, quinoline Yellow, Permanent Orange GTR, Pyrazolone Orange, Vulcan Orange, Watch Young Red, Permanent Red, Brilliantamine 3B, Brilliantamine 6B, Dapon Oil Red, Pyrazolone Red, Resol Red, Rhodamine B Lake, Lake Red C, Rose Bengal, Aniline Various pigments such as blue, ultramarine blue, calco oil blue, methylene blue chloride, phthalocyanine blue, phthalocyanine green, and malachite green oxalelate are listed. It is. Acridine, xanthene, azo, benzoquinone, azine, anthraquinone, thioindico, dioxazine, thiazine, azomethine, indico, thioindico, phthalocyanine, aniline black, polymethine, triphenyl Examples thereof include various dyes such as methane, diphenylmethane, thiazine, thiazole, and xanthene.
These colorants may be used alone or in combination of two or more.
There is no restriction | limiting in particular in content of the said coloring agent, According to the objective, it can select suitably, The range of 2-8 mass% is preferable. When the content of the colorant is less than 2% by mass, the coloring power may be weakened, and when it exceeds 8% by mass, the transparency may be impaired.

-Toner release agent-
The release agent is not particularly limited and may be appropriately selected from those usually used for toner according to the purpose. For example, a relatively low molecular weight highly crystalline polyethylene wax or Fischer-Tropsch wax is used. In particular, amide wax, polar wax containing nitrogen such as a compound having a urethane bond, and the like are particularly effective.
The molecular weight of the polyethylene wax is preferably 1000 or less, and more preferably 300 to 1000.
The compound having a urethane bond is suitable because even if it has a low molecular weight, the solid state can be maintained and the melting point can be set high for the molecular weight due to the strength of cohesive force due to the polar group. A preferable range of the molecular weight is 300 to 1,000. Raw materials are combinations of diisocyanate compounds and monoalcohols, combinations of monoisocyanic acid and monoalcohols, combinations of dialcohols and monoisocyanic acid, combinations of trialcohols and monoisocyanic acid, triisocyanic acid Various combinations such as combinations of compounds and monoalcohols can be selected. However, in order not to increase the molecular weight, it is preferable to combine a compound having a polyfunctional group and a monofunctional group, and an equivalent functional group. It is preferable to make it an amount.

Examples of the monoisocyanate compound include dodecyl isocyanate, phenyl isocyanate and derivatives thereof, naphthyl isocyanate, hexyl isocyanate, benzyl isocyanate, butyl isocyanate, allyl isocyanate, and the like.
Examples of the diisocyanate compound include tolylene diisocyanate, 4,4'diphenylmethane, toluene diisocyanate, 1,3-diisocyanate 1,3-phenylene, hexamethylene diisocyanate, 4-methyl-m-phenylene diisocyanate, and diisocyanate. Isophorone, and the like.
Examples of the monoalcohol include methanol, ethanol, propanol, butanol, pentanol, hexanol, heptanol, and the like.
Examples of the dialcohols include a number of glycols such as ethylene glycol, diethylene glycol, triethylene glycol, and trimethylene glycol; examples of the trialcohols include trimethylolpropane, triethylolpropane, and trimethanolethane. .

  These urethane compounds can be mixed with a resin and a colorant at the time of kneading and used as a kneaded and pulverized toner as in a normal release agent. Also, when used in the emulsion polymerization aggregation melting toner described above, it is dispersed in water together with a polymer electrolyte such as an ionic surfactant, a polymer acid or a polymer base, and heated to a melting point or higher to produce a homogenizer or pressure discharge. A fine dispersion is obtained by applying strong shearing with a mold disperser to prepare a release agent particle dispersion of 1 μm or less, which can be used together with a resin particle dispersion, a colorant dispersion and the like.

-Other components of toner-
The toner may contain other components such as an internal additive, a charge control agent, and inorganic fine particles. Examples of the internal additive include metals such as ferrite, magnetite, reduced iron, cobalt, nickel, and manganese, alloys, and magnetic materials such as compounds containing these metals.

  Examples of the charge control agent include various commonly used charge control agents such as quaternary ammonium salt compounds, nigrosine compounds, dyes made of complexes of aluminum, iron, chromium, and triphenylmethane pigments. can do. A material that is difficult to dissolve in water is preferable from the viewpoint of controlling the ionic strength that affects the stability during aggregation and melting and reducing wastewater contamination.

  Examples of the inorganic fine particles include silica, alumina, titania, calcium carbonate, magnesium carbonate, and tricalcium phosphate. Usually, all external additives on the toner surface can be used, and these can be used as ionic surfactants or polymer acids. It is preferable to use it dispersed in a polymer base.

  Furthermore, a surfactant can be used for emulsion polymerization, seed polymerization, pigment dispersion, resin particle dispersion, release agent dispersion, aggregation, and stabilization thereof. For example, anionic surfactants such as sulfate ester, sulfonate, phosphate, and soap, cationic surfactants such as amine salt type and quaternary ammonium salt type, polyethylene glycol type, alkylphenol It is also effective to use a nonionic surfactant such as an ethylene oxide adduct system or a polyhydric alcohol system in combination. As a dispersing means at that time, a general means such as a rotary shear type homogenizer, a ball mill having a media, a sand mill, a dyno mill or the like can be used.

An external additive may be further added to the toner as necessary. Examples of the external additive include inorganic particles and organic particles. Examples of the inorganic particles, for _{example, SiO 2, TiO 2, Al} 2 O 3, CuO, ZnO, SnO 2, Fe 2 O 3, MgO, BaO, CaO, K 2 O, Na 2 O, ZrO 2, CaO · _{SiO 2, K 2 O · (} TiO 2) n, Al 2 O 3 · 2SiO 2, CaCO 3, MgCO 3, BaSO 4, MgSO 4, and the like. Moreover, as said organic particle, fatty acid or its derivative (s), powders, such as these metal salts, resin powders, such as a fluorine resin, a polyethylene resin, an acrylic resin, etc. can be used, for example.
For example, the average particle diameter of these particles is preferably 0.01 to 5 μm, and more preferably 0.1 to 2 μm.

  The method for producing the toner is not particularly limited and may be appropriately selected depending on the purpose. (I) A step of forming aggregated particles in a dispersion obtained by dispersing resin particles to prepare an aggregated particle dispersion (Ii) adding and mixing a fine particle dispersion in which fine particles are dispersed in the aggregated particle dispersion to adhere the fine particles to the aggregated particles to form the adhered particles; and (iii) the attached particles. The toner is preferably manufactured by a method for manufacturing a toner comprising a step of heating and coalescing to form toner particles.

-Physical properties of toner-
The volume average particle diameter of the toner is preferably 0.5 μm or more and 10 μm or less.
If the volume average particle diameter of the toner is too small, there may be an adverse effect on toner handling (replenishability, cleaning properties, fluidity, etc.), and particle productivity may be reduced. On the other hand, if the volume average particle diameter of the toner is too large, the image quality and resolution due to graininess and transferability may be adversely affected.
The toner preferably satisfies the volume average particle size range of the toner and has a volume average particle size distribution index (GSDv) of 1.3 or less.
The ratio (GSDv / GSDn) of the volume average particle size distribution index (GSDv) to the number average particle size distribution index (GSDn) is preferably 0.95 or more.
Further, the toner preferably satisfies the volume average particle diameter range of the toner, and the average value of the shape factor represented by the following formula is preferably 1.00 to 1.50.
Shape factor = (π × L ² ) / (4 × S)
(However, L represents the maximum length of toner particles, and S represents the projected area of toner particles.)
When the toner satisfies the above conditions, it has an effect on image quality, particularly graininess and resolution, and it is difficult to cause omission and blur due to transfer, and handling properties are adversely affected even if the average particle size is not small. It becomes difficult.

The storage modulus G ′ (measured at an angular frequency of 10 rad / sec) at 150 ° C. of the toner itself is 1 × 10 ² to 1 × 10 ⁵ Pa, which improves image quality and offset property in the fixing process. It is appropriate in terms of prevention.

  The electrophotographic image-receiving sheet of the present invention is excellent in flatness and gloss after image formation, is free of blisters and reliefs, is excellent in water resistance and adhesion resistance, and can record high quality images with excellent texture. Is preferred.

(Image forming method)
The image forming method on the electrophotographic image receiving sheet of the present invention comprises a toner image forming step of forming a toner image on the electrophotographic image receiving sheet of the present invention, and a smooth surface of the toner image formed by the toner image forming step. An image surface smoothing and fixing step to be converted, and further a thermal fixing step and other means as necessary.

-Toner image forming process-
The toner image forming step is not particularly limited as long as it can form a toner image on an electrophotographic image-receiving sheet, and can be appropriately selected according to the purpose. The method used, for example, a direct transfer method in which a toner image formed on a developing roller is transferred to an electrophotographic image receiving sheet, or an intermediate transfer belt that is first transferred to an intermediate transfer belt and then transferred to an electrophotographic image receiving sheet A method is mentioned. Among these, the intermediate transfer belt method can be preferably used in terms of environmental stability and high image quality.
-Thermal fixing process-
A heat fixing step may be performed between the toner image forming step and the subsequent image surface smoothing fixing step. The thermal fixing step is a step of fixing the toner image formed by the toner image forming step by heating using any one of a fixing roller, a fixing belt, and a combination thereof.
There is no restriction | limiting in particular in the said heating, According to the objective, it can select suitably, Usually, it is preferable to carry out at 80-200 degreeC.

-Image surface smoothing and fixing process-
The image surface smoothing and fixing step is a step of smoothing the surface of the toner image formed by the toner image forming step. In the image surface smoothing and fixing step, the toner image is heated and pressed using an image surface smoothing and fixing processor having a heating and pressing member, a belt member, and a cooling device, and then cooled and peeled off.
The image surface smoothing and fixing processor includes a heating / pressurizing member, a belt member, and a cooling device, and includes a cooling / separating portion and, if necessary, other members.

The heating and pressing member is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a pair of heating rollers and a combination of a heating roller and a pressing roller.
There is no restriction | limiting in particular as said cooling device, According to the objective, it can select suitably, For example, a cooling device, a heat sink, etc. which can blow cold air and can adjust cooling temperature etc. are used.
The cooling and peeling portion is not particularly limited and can be appropriately selected according to the purpose. For example, the position near the tension roll that peels from the belt by the rigidity (waist strength) of the electrophotographic image-receiving sheet itself can be mentioned. It is done.

When the toner image is brought into contact with the heating and pressing member of the image surface smoothing fixing processor, it is preferable to apply pressure. There is no restriction | limiting in particular as this pressurization method, Although it can select suitably according to the objective, It is preferable to employ | adopt a nip pressure. The nip pressure is preferably 1 to 100 kgf / cm ² (9.8 to 980 N / cm ² ) from the viewpoint of forming an image having excellent water resistance and surface smoothness and good gloss, and 5 to 30 kgf / cm ² (49-294 N / cm ² ) is more preferable. Further, the heating in the heating and pressing member is a temperature equal to or higher than the softening point of the toner image-receiving layer polymer, and varies depending on the toner image-receiving layer polymer to be used. The cooling temperature in the cooling device is preferably 80 ° C. or less, more preferably 20 to 80 ° C., at which the toner image-receiving polymer layer is sufficiently solidified.

The belt member includes a heat resistant support film and a release layer formed on the support film.
The material of the support film is not particularly limited as long as it has heat resistance, and can be appropriately selected according to the purpose. For example, polyimide (PI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET) ), Polyether ether ketone (PEEK), polyether sulfone (PES), polyether imide (PEI), polyparabanic acid (PPA), and the like.

  The release layer preferably contains at least one selected from silicone rubber, fluorine rubber, fluorocarbon siloxane rubber, silicone resin and fluorine resin. Among these, the belt member has an aspect in which a fluorocarbon siloxane rubber-containing layer is provided on the belt support, has a silicone rubber-containing layer on the belt support, and contains a fluorocarbon siloxane rubber on the surface of the silicone rubber-containing layer. An embodiment in which a layer is provided is preferred.

The fluorocarbon siloxane rubber in the fluorocarbon siloxane rubber-containing layer preferably has at least one of a perfluoroalkyl ether group and a perfluoroalkyl group in the main chain.
As said fluorocarbon siloxane rubber, the hardened | cured material of the fluorocarbon siloxane rubber composition containing the following (A)-(D) component is suitable.
(A) a fluorocarbon polymer having a fluorocarbon siloxane represented by the following general formula (1) as a main component and having an aliphatic unsaturated group; (B) containing two or more ≡SiH groups in one molecule; At least one of organopolysiloxane and fluorocarbon siloxane having an ≡SiH group content of 1 to 4 times the molar amount of the aliphatic unsaturated group in the product, (C) a filler, and (D) effective Amount of catalyst.

  The (A) component fluorocarbon polymer is mainly composed of a fluorocarbon siloxane having a repeating unit represented by the following general formula (1) and has an aliphatic unsaturated group.

In the general formula (1), R ¹⁰ is an unsubstituted or substituted monovalent hydrocarbon group having 1 to 8 carbon atoms, and an alkyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 3 carbon atoms. A methyl group is preferable, and a methyl group is particularly preferable.
a and e each represents an integer of 0 or 1; b and d each represent an integer of 1 to 4. c represents an integer of 0 to 8. Further, x is preferably 1 or more, and more preferably 10-30.

As said (A) component, what is shown by following General formula (2) can be mentioned.

  In the component (B), examples of the organopolysiloxane having an ≡SiH group include organohydrogenpolysiloxanes having at least two hydrogen atoms bonded to silicon atoms in the molecule.

  In the fluorocarbon siloxane rubber composition, when the fluorocarbon polymer of the component (A) has an aliphatic unsaturated group, it is preferable to use the above-described organohydrogenpolysiloxane as the curing agent. . That is, a cured product is formed by an addition reaction that occurs between an aliphatic unsaturated group in the fluorocarbon siloxane and a hydrogen atom bonded to a silicon atom in the organohydrogenpolysiloxane.

  As the organohydrogenpolysiloxane, various organohydrogenpolysiloxanes used in addition-curable silicone rubber compositions can be used.

  In general, the number of ≡SiH groups in the organohydrogenpolysiloxane is preferably at least one with respect to one aliphatic unsaturated hydrocarbon group in the fluorocarbon siloxane as the component (A). It is preferable to mix | blend in the ratio which becomes an individual.

In addition, the fluorocarbon having an ≡SiH group may be a unit of the above general formula (1), or in the above general formula (1), R ¹⁰ is a dialkylhydrogensiloxy group, and a terminal is a dialkylhydrogensiloxy group or silyl group. Those having a ≡SiH group such as a group are preferred, and examples thereof include those represented by the following general formula (3).

  As the filler of the component (C), various fillers used in general silicone rubber compositions can be used. Examples of the filler include fumed silica, precipitated silica, carbon powder, titanium dioxide, aluminum oxide, quartz powder, reinforcing filler such as talc, sericite, bentonite, asbestos, glass fiber, and organic fiber. Examples thereof include fibrous fillers.

  As the catalyst of the component (D), chloroplatinic acid, alcohol-modified chloroplatinic acid, complexes of chloroplatinic acid and olefin, platinum black or palladium, which are known as addition reaction catalysts, alumina, silica, carbon, etc. And a compound of group VIII of the periodic table such as a complex of rhodium and olefin, chlorotris (triphenylphosphine) rhodium (Wilkinson catalyst), rhodium (III) acetylacetonate or the like. It is done. These complexes are preferably used by dissolving in a solvent such as an alcohol compound, an ether compound, or a hydrocarbon compound.

  There is no restriction | limiting in particular in the said fluorocarbon siloxane rubber composition, According to the objective, it can select suitably, A various compounding agent can be added. For example, diphenylsilane diol, low-polymerization degree molecular chain terminal hydroxyl-blocked dimethylpolysiloxane, dispersant such as hexamethyldisilazane, heat resistance improver such as ferrous oxide, ferric oxide, cerium oxide, iron octylate Further, colorants such as pigments can be blended as necessary.

  The belt member is obtained by coating the surface of the heat-resistant support film with the fluorocarbon siloxane rubber composition, followed by heat curing. If necessary, m-xylene hexafluoride, benzotrifluoride, etc. It can be applied by a general coating method such as spray coating, dip coating and knife coating. Moreover, the temperature and time of heat-curing can be selected suitably, and it selects according to the kind of a support body film, a manufacturing method, etc. in the range of temperature 100-500 degreeC and 5 second-5 hours.

  The thickness of the release layer formed on the surface of the heat-resistant support film is not particularly limited, but is 1 to 200 μm in order to obtain good image fixability by preventing toner releasability or toner component offset. Is preferable, and 5-150 micrometers is more preferable.

Here, an example of the image surface smoothing and fixing processor in the image forming apparatus of the present invention will be specifically described with reference to FIG.
First, the toner 12 is transferred to the electrophotographic recording material 1 by an image forming apparatus (not shown). The electrophotographic recording material 1 to which the toner 12 has adhered is conveyed to point A by a transport facility (not shown), passes between the heating roller 14 and the pressure roller 15, and is a toner image receiving layer or toner of the electrophotographic recording material 1. 12 is heated and pressurized at a temperature (fixing temperature) and a pressure at which 12 is sufficiently softened.

Here, the fixing temperature means the temperature of the surface of the toner image receiving layer measured at the position of the heating roller 14, the pressure roller 15, and the nip portion at point A, and is preferably 80 to 190 ° C., for example, 100 to 170 ° C. Is more preferable. Further, the pressure means the pressure on the surface of the toner image-receiving layer measured at the heating roller 14, the pressure roller 15, and the nip portion, and is preferably 1 to 10 kgf / cm ² (9.8 to 98 N / cm ² ), for example. ^{2~7kgf / cm 2 (19.6~68.6N / cm} 2) is more preferable.
The release agent (not shown) discretely present in the toner image-receiving layer while the electrophotographic recording material 1 was heated and pressurized in this manner and then conveyed to the cooling device 16 by the fixing belt 13. Is sufficiently heated and melted, and moves to the surface of the toner image-receiving layer. The released release agent forms a release agent layer (film) on the surface of the toner image-receiving layer. Thereafter, the electrophotographic recording material 1 is transported to the cooling device 16 by the fixing belt 13 and is, for example, below the softening point of the binder resin used for either the polymer or toner of the toner image receiving layer or the glass transition point + 10 ° C. The temperature is preferably cooled to 20 to 80 ° C, more preferably to room temperature (25 ° C). As a result, the release agent layer (film) formed on the surface of the toner image-receiving layer is cooled and solidified to form a release agent layer.
The cooled electrophotographic recording material 1 is further conveyed to point B by the fixing belt 13, and the fixing belt 13 moves on the tension roller 17. Therefore, the electrophotographic recording material 1 and the fixing belt 13 are peeled off at the point B. Note that it is preferable to set the diameter of the tension roller 17 small so that the electrophotographic image-receiving sheet is peeled off from the fixing belt 13 with its own rigidity (stretch strength).

Further, the image surface smoothing and fixing processor as shown in FIG. 3 is modified as a fixing unit of the electrophotographic apparatus shown in FIG. Can be used.
In FIG. 2, 200 is an image forming apparatus, 37 is a photosensitive drum, 19 is a developing device, 31 is an intermediate transfer belt, 18 is an electrophotographic recording material, and 25 is a fixing unit (image surface smoothing fixing processor). Show.
FIG. 3 shows a fixing unit (image surface smoothing fixing processor) 25 disposed in the image forming apparatus 200 of FIG.
As shown in FIG. 3, the image surface smoothing and fixing processor 25 includes a heating roller 71, a peeling roller 74 including the heating roller 71, an endless belt 73 rotatably supported by a tension roller 75, A pressure roller 72 is provided in pressure contact with the heating roller 71 via an endless belt 73.
A cooling heat sink 77 for forcibly cooling the endless belt 73 is disposed between the heating roller 71 and the peeling roller 74 on the inner surface side of the endless belt 73. 77 constitutes a cooling and sheet conveying section for cooling the electrophotographic recording material and conveying the sheet.

  Then, as shown in FIG. 3, the image surface smoothing and fixing processor 25 has an electrophotographic recording material having a color toner image transferred and fixed on the surface thereof, a heating roller 71 and an endless belt 73 attached to the heating roller 71. A color toner image is introduced into a pressure contact portion (nip portion) with the pressure roller 72 that is in contact with the pressure roller 72 so as to be positioned on the heating roller 71 side, and passes through the pressure contact portion between the heat roller 71 and the pressure roller 72. In the meantime, the color toner image is heated and melted and fixed on the electrophotographic recording material.

  Thereafter, at the pressure contact portion between the heating roller 71 and the pressure roller 72, for example, the toner is heated to a temperature of about 120 to 130 ° C. and melted to fix the color toner image on the toner image receiving layer. The electrophotographic recording material is conveyed together with the endless belt 73 with the toner image-receiving layer on the surface thereof kept in close contact with the surface of the endless belt 73. In the meantime, the endless belt 73 is forcibly cooled by a heat sink 77 for cooling, and the color toner image and the toner image receiving layer are cooled and solidified, and then the waist (rigidity) of the electrophotographic image receiving sheet itself by the peeling roller 74. Is peeled off.

  Incidentally, the surface of the endless belt 73 after the peeling process is completed is prepared for the next image surface smoothing and fixing process by removing residual toner and the like by a cleaner (not shown).

  According to the image forming method of the present invention, by using the electrophotographic image receiving sheet of the present invention, it is excellent in flatness and gloss after image formation, has no blisters and reliefs, and has water resistance and adhesion resistance. In addition, it is possible to record high-quality images with excellent texture.

  Examples of the present invention will be described below, but the present invention is not limited to these examples.

Example 1
-Production of support-
A white plastic film is used as the substrate. As the white plastic film, a polyethylene terephthalate resin (polyester resin) film containing 12% by mass of titanium dioxide and stretched to a thickness of 150 μm was used.
The white plastic film had a whiteness (Hunter whiteness) of 93%. The whiteness was measured by the method defined in JIS P 8123.
A polyethylene composition comprising low density polyethylene (LDPE) / high density polyethylene (HDPE) = 5/5 (mass ratio) on the side (front surface) of the white plastic film on which the toner image-receiving layer is provided has a thickness of 29 μm. Then, a melt two-layer coextrusion coating was performed using a coextruder to form a front surface polymer coating layer.
On the other hand, a polyethylene composition composed of low density polyethylene (LDPE) / high density polyethylene (HDPE) = 3/7 (mass ratio) is formed on the opposite surface (back surface) of the white plastic film on the side where the toner image receiving layer is provided. The melted two-layer coextrusion coating was carried out using a coextrusion machine to form a back surface polymer coating layer.
Thus, the support used in Example 1 was manufactured.

-Production of electrophotographic image-receiving sheet-
Using the support obtained above, an electrophotographic image-receiving sheet of Example 1 was produced by the following method.

-Titanium dioxide dispersion-
Nippon Seiki Seisakusho Co., Ltd. was mixed with 40.0 g of titanium dioxide (Typaque (registered trademark) A-220, manufactured by Ishihara Sangyo Co., Ltd.), 2.0 g of polyvinyl alcohol (PVA102, manufactured by Kuraray Co., Ltd.), and 58.0 g of ion-exchanged water. A titanium dioxide dispersion (with a titanium dioxide pigment content of 40% by mass) was prepared by dispersing using NBK-2.

-Preparation of coating solution for toner image-receiving layer-
15.5 g of the titanium dioxide dispersion, 15.0 g of carnauba wax dispersion (Cerosol 524, manufactured by Chukyo Yushi Co., Ltd.), polyester resin aqueous dispersion (solid content 30% by mass, KZA-7049, manufactured by Unitika Ltd.) 100 0.0 g, thickener (Alcox E30, manufactured by Meisei Chemical Co., Ltd.) 2.0 g, anionic surfactant (AOT) 0.5 g, and ion-exchanged water 80 ml are mixed and stirred to form a toner image-receiving layer coating solution. Was prepared.
The resulting toner image-receiving layer coating solution had a viscosity of 40 mPa · s and a surface tension of 34 mN / m.

-Preparation of coating solution for back layer-
The following components were mixed and stirred to prepare a back layer coating solution.
Acrylic resin water dispersion (solid content 30% by mass, Hiloss XBH-997L, manufactured by Seiko Chemical Industry Co., Ltd.) 100.0 g, matting agent (Techpomer MBX-12, manufactured by Sekisui Plastics Co., Ltd.) 5.0 g, release A mold (Hydrin D337, manufactured by Chukyo Yushi Co., Ltd.) 10.0 g, a thickener (CMC) 2.0 g, an anionic surfactant (AOT) 0.5 g, and 80 ml of ion-exchanged water are mixed and stirred. A coating solution for the back layer was prepared.
The viscosity of the obtained coating liquid for back layer was 35 mPa · s, and the surface tension was 33 mN / m.

-Coating of back layer and toner image-receiving layer-
The back layer coating liquid was applied to the surface (back surface) of the support where the toner image-receiving layer was not provided with a bar coater so that the dry mass was 9 g / m ² to form a back layer.
The toner image-receiving layer coating solution was applied to the front surface of each support with a bar coater so that the dry mass was 12 g / m ² , thereby forming a toner image-receiving layer. The pigment content in the toner image-receiving layer was 5% by mass relative to the thermoplastic resin.

The back layer and the toner image receiving layer were coated and then dried online with hot air. In the drying, the drying air volume and temperature were adjusted so that both the back layer and the toner image-receiving layer were dried within 2 minutes after coating. The drying point was the point at which the coating surface temperature was the same as the wet bulb temperature of the drying air.
Next, after drying, a calendar process was performed. The calendering process was performed under the condition of a nip pressure of 14.7 kN / cm ² (15 kgf / cm ² ) using a gloss calender and keeping the metal roller at 40 ° C.

(Examples 2-7 and Comparative Examples 1-5)
-Production of support for image recording material-
Example 1 is the same as Example 1 except that the base material of the support, the constitution of the front surface polymer coating layer and the back surface polymer coating layer, and the resin of the toner image receiving layer are as shown in Table 2. Similarly, image receiving sheets for electrophotography of Examples 2 to 7 and Comparative Examples 1 to 5 were produced.
In Examples 1 to 4, 6 and 7, the white pigment shown in Table 2 was included to form a white plastic film, but in Example 5, the white was obtained by adding microvoids in the polypropylene resin by biaxial stretching. A plastic film was used (YUPO FPG150, manufactured by YUPO Corporation).
In Comparative Example 5, a polypropylene resin film containing neither a white pigment nor microvoids was used.

＊ＰＥＴ：ポリエチレンテレフタレート樹脂
＊ＰＰ：基材用のポリプロピレン樹脂、ＭＦＲ＝４２ｇ／１０分、密度＝０．９０５ｇ／ｃｍ^３
＊結晶性ＰＰ：ポリマー被覆層用の結晶性ポリプロピレン樹脂、ＭＦＲ＝５．５ｇ／１０分、密度＝０．９０ｇ／ｃｍ^３
＊非晶質ＰＰ：ポリマー被覆層用の非晶質ポリプロピレン樹脂、ＭＦＲ＝３ｇ／１０分、密度＝０．８６ｇ／ｃｍ^３
＊ＬＤＰＥ：低密度ポリエチレン、ＭＦＲ＝３．５ｇ／１０分、密度＝０．９２４ｇ／ｃｍ^３
＊ＨＤＰＥ：高密度ポリエチレン、ＭＦＲ＝１５ｇ／１０分、密度＝０．９６８ｇ／ｃｍ^３
＊ＰＶＡ：ポリビニルアルコール樹脂、重合度４５００；ＰＶＡ４４０（（株）クラレ製）
＊シリカ微粒子：平均１次粒子径７ｎｍ；屈折率１．４５；エアロジルＡ３００（日本アエロジル（株）製）

* PET: Polyethylene terephthalate resin * PP: Polypropylene resin for base material, MFR = 42 g / 10 min, density = 0.905 g / cm ³
* Crystalline PP: Crystalline polypropylene resin for polymer coating layer, MFR = 5.5 g / 10 min, density = 0.90 g / cm ³
* Amorphous PP: Amorphous polypropylene resin for polymer coating layer, MFR = 3 g / 10 min, density = 0.86 g / cm ³
* LDPE: low density polyethylene, MFR = 3.5 g / 10 min, density = 0.924 g / cm ³
* HDPE: high density polyethylene, MFR = 15 g / 10 min, density = 0.968 g / cm ³
* PVA: polyvinyl alcohol resin, polymerization degree 4500; PVA440 (manufactured by Kuraray Co., Ltd.)
* Silica fine particles: average primary particle diameter 7 nm; refractive index 1.45; Aerosil A300 (manufactured by Nippon Aerosil Co., Ltd.)

<Image formation>
The obtained electrophotographic image-receiving papers of Examples 1 to 7 and Comparative Examples 1 to 5 were cut into A4 size, and the full color laser printer (DCC-500 manufactured by Fuji Xerox Co., Ltd.) shown in FIG. 3) was modified to the image surface smoothing fixing processor shown in FIG. 3 to form an image, and the fixing smoothing process was performed under the following conditions.

−Belt−
Belt support: polyimide (PI) film, width = 50 cm, thickness = 80 μm
Release layer material for belt: SIFEL610 (manufactured by Shin-Etsu Chemical Co., Ltd.), which is a fluorocarbonsiloxane rubber precursor, was vulcanized and cured to form a fluorocarbonsiloxane rubber with a film thickness of 50 μm.
-Heating and pressing process-
Temperature of heating roller: can be arbitrarily adjusted arbitrarily.
Nip pressure: 130 N / cm ²
-Cooling process-
Cooler: Heat sink length = 80mm
Conveyance speed: 53mm / sec

  About the obtained electrophotographic print of Examples 1-7 and Comparative Examples 1-5, non-blister property, non-relief property, water resistance, adhesion resistance, and image quality were evaluated as follows. The results are shown in Table 3.

<Blister evaluation>
For each electrophotographic image-receiving sheet, the temperature of the fixing belt at which blistering due to image formation began to occur was measured and evaluated according to the following criteria according to the temperature.
〔Evaluation criteria〕
5: The temperature at which blistering begins to occur is 140 ° C. or higher, and is very excellent in non-blistering properties.
4: The temperature at which blistering begins to occur is 135 ° C. or more and less than 140 ° C., and is excellent in non-blistering properties.
3: The temperature at which blistering begins to occur is 130 ° C. or higher and lower than 135 ° C., which is slightly inferior to non-blistering.
2: The temperature at which blistering begins to occur is 120 ° C. or more and less than 130 ° C., and is inferior in non-blister properties.
1: The temperature at which blistering begins to occur is less than 120 ° C., which is very poor in non-blistering properties.

<Evaluation of relief>
The relief of the obtained electrophotographic print (unevenness of the portion with and without toner) was visually observed by 30 people and evaluated based on the following criteria.
〔Evaluation criteria〕
5: Relief is not recognized at all, and the non-relief property is very excellent.
4: Depending on the angle, it is recognized and excellent in non-relief.
3: Relief is recognized, but the image quality is acceptable and the non-relief property is good.
2: Relief was recognized, and 1/3 or more observers evaluated that it was unacceptable as a photographic image quality, and it was inferior to non-relief property.
1: Relief is recognized, and all observers evaluate that it is unacceptable as photographic image quality, which is very poor in non-relief property.
0: The toner image-receiving layer or the toner partially peels, and the non-relief property cannot be evaluated.

<Water resistance>
Visually observe the penetration state, the degree of edge waves, the peeling state between the coating layer and the base paper, and the peeling state in the base paper after each electrophotographic image-receiving sheet cut to A4 size is immersed in water at 20 ° C. for 30 minutes. Based on the following criteria, the best water resistance was ranked 5 and then ranked 4, 3, 2, 1 and evaluated.
〔Evaluation criteria〕
5 ... Excellent water resistance and no problem.
4 ... Excellent water resistance and no problem.
3: Slightly inferior in water resistance and slightly problematic.
2 ... Poor water resistance and problematic.
1: Very inferior in water resistance.

<Evaluation of adhesion resistance>
Two substrates cut to a postcard size are laminated so that the front surface polymer coating layer and the back surface polymer coating layer face each other, and a 1 kg weight is placed thereon, and the condition is 40 ° C. and 80% RH. After standing for 1 month under the condition, the degree of adhesion between the front surface polymer coating layer and the back surface polymer coating layer was evaluated.
〔Evaluation criteria〕
5: There is no adhesion between the front surface polymer coating layer and the back surface polymer coating layer, and it is very effective as a support.
4 ... It has a very weak adhesion to a part and is effective as a support.
3 ... Although there is weak adhesion partially, it is within an allowable range as a support.
2 ... There is strong adhesion partially, and it is not suitable as a support.
1 ... There is strong adhesion on the whole surface, and it is extremely unsuitable as a support.

<Image quality>
The image quality of each electrophotographic print was visually observed for texture, hue, and sharpness, and evaluated based on the following criteria.
〔Evaluation criteria〕
5: Excellent image quality (very effective as an electrophotographic image receiving sheet).
4. Excellent image quality (effective as an electrophotographic image receiving sheet).
3: Medium image quality (acceptable as an electrophotographic image-receiving sheet).
2 ... Poor image quality (unacceptable as an electrophotographic image-receiving sheet).
1: Very poor in image quality (not acceptable as an electrophotographic image receiving sheet).

From the results shown in Table 3, Examples 1 to 7 of the present invention having a support having a polymer coating layer on both sides of a white plastic film and a toner image receiving layer containing a polyester resin and / or an acrylic resin on the support. The electrophotographic image receiving sheet has a high whiteness of less than 80%, excellent flatness and gloss after image formation, no blistering and no relief, and can record high quality images with excellent texture. It was. In addition, by using the support as described above, an electrophotographic image-receiving sheet having excellent water resistance, no sticking to a laser printer or other electrophotographic image-receiving sheet, etc., and excellent adhesion resistance is obtained. It was found that
In particular, in Examples 1 to 3, the front polymer coating layer contains 50% by mass or more of low-density polyethylene resin, and in Examples 4 to 5, it contains 5 to 60% by mass of amorphous polypropylene resin. Thus, an electrophotographic image-receiving sheet having particularly excellent adhesion resistance and image quality was obtained.
On the other hand, in Comparative Examples 1 to 5 in which base paper is used for the base material of the support, no polymer coating layer is provided, or a resin other than polyester resin and acrylic resin is used for the toner image receiving layer, blisters and reliefs are used. Or poor water resistance or adhesion resistance, and high-quality images could not be formed.

  The electrophotographic image-receiving sheet of the present invention is excellent in flatness and gloss after image formation, has no blister and relief, is excellent in water resistance and adhesion resistance, and can record a high-quality image excellent in texture, It can be suitably used for electrophotographic printing.

FIG. 1 is a schematic view showing an example of an image surface smoothing fixing processor according to the present invention. FIG. 2 is a schematic view showing an example of the image forming apparatus of the present invention. FIG. 3 is a schematic diagram showing an example of the image surface smoothing fixing processor in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electrophotographic material 12 Toner 13 Fixing belt 14 Heating roller 15 Pressure roller 16 Cooling device 17 Tension roller 18 Electrophotographic material 19 Developing device 25 Image surface smoothing fixing processor 31 Intermediate transfer belt 71 Heating roller 72 Pressure roller 74 Peeling Roller 75 Tension roller 73 Endless belt 77 Cooling heat sink 200 Image forming apparatus

Claims (8)

  A support having at least one polymer coating layer on both sides of the white plastic film, and a toner image receiving layer containing at least one selected from an aromatic polyester resin and an acrylic resin on the support; An electrophotographic image-receiving sheet comprising the electrophotographic image-receiving sheet.   The electrophotographic image-receiving sheet according to claim 1, wherein the white plastic film is at least one selected from a stretched polyester resin film and a stretched polypropylene resin film.   The electrophotographic image-receiving sheet according to claim 1, wherein the thickness of the white plastic film is 20 to 300 μm.   The electrophotographic image-receiving sheet according to any one of claims 1 to 3, wherein the white plastic film has a whiteness of 80 to 100%. The electron according to any one of claims 1 to 4, wherein the polymer coating layer on the side of the white plastic film on which the toner image-receiving layer is provided contains 50% by mass or more of low-density polyethylene resin having an average density of less than 0.93 g / cm ^3. Photographic image-receiving sheet.   The electrophotographic image-receiving sheet according to any one of claims 1 to 4, wherein the polymer coating layer on the surface on which the toner image-receiving layer of the white plastic film is provided contains 5 to 60% by mass of an amorphous polypropylene resin.   7. A toner image forming step for forming a toner image on the electrophotographic image-receiving sheet according to claim 1, and an image surface smoothing and fixing for smoothing the surface of the toner image formed by the toner image forming step. And an image forming method. The image surface smoothing and fixing step heats and pressurizes the toner image using an image surface smoothing and fixing processor having a heating and pressing member, a belt member, and a cooling device, and cools and peels off the toner image. Image forming method.

Images