JP2002067233A - Image recording body and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image recording body which has a performance of causing no phenomenon of toner blister or paper blister and enabling printing of an image at a high speed and sufficient fixation of a toner image in an electrophotographic method and which is excellent in ink absorbing properties and color developing properties and has a performance of being capable of preventing blotting of ink in an ink jet recording method, and a manufacturing method of the image recording body. SOLUTION: The image recording body has a constitution wherein an image receiving layer constituted at least of resin particles of a hot-melt resin and of a bonding resin for bonding the resin particles to the surface of a base is formed on the surface of the base. The manufacturing method of the image recording body has a process of forming the image receiving layer by coating the surface of the base with a coating solution constituted at least of the resin particles of the hot-melt resin, the bonding resin for bonding the resin particles and a solvent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an image recording medium suitably used for an image forming apparatus of an electrophotographic recording system or an ink jet recording system, and a method of manufacturing the same.

[0002]

2. Description of the Related Art As an image forming method by an image forming apparatus, there are an electrophotographic recording method and an ink jet recording method. In an image forming method using an electrophotographic recording method, a surface of an image carrier (photoreceptor) is charged, an exposure process and a development process are performed to form a toner image, and the toner image is transferred to a transfer material surface each time the toner image is obtained. The process is repeated to obtain a toner image on the surface of the transfer material. When a color image is obtained, this step is repeated a plurality of times. Finally, by applying heat and pressure, the toner on the transfer material is fixed and fixed on a recording material as an image recording medium.

As an image recording medium used in the electrophotographic recording system, generally, plain paper or a transparent sheet for overhead projector (OHP) (hereinafter, “OHP sheet”) is used.
Etc.). The properties required for the image recording medium are that the recording material has a commonality with a conventional recording medium; that it does not change due to heat, pressure, etc. applied in the electrophotographic recording process; Good transportability of the recording medium; Fixing and fixing of the toner image on the image recording medium so that it can be used and stored for a long time as a recording medium; High-quality image that faithfully reflects the original is obtained That the load on the global environment is small when finally discarded; In addition, O used for presentation as a recording medium
In the case of an HP sheet, in addition to this, light transmittance and the like are required.

On the other hand, recently, an environment in which a color image can be easily used has been prepared, and an electrophotographic recording system has been widely used because of high productivity and high image quality. Many studies have been made on OHP sheets for color images used for presentations in order to meet the demand for higher image quality. For example, to form an image receiving layer having a high affinity for toner on the surface of the base material or to prevent a decrease in transmittance due to irregular reflection at an interface between the toner image and the image receiving layer, the compatibility with the toner is reduced. For example, thickening of high resin is performed.

In particular, in the case of a color image, various pigments of cyan, magenta, and yellow are mixed in the color toner, and the image density is higher than that of a black-and-white image, so that the color developing property of the color toner is improved. It is necessary to sufficiently melt and mix the toner.

Generally, in a fixing step of melting toner in an electrophotographic recording system, a sufficient fixing temperature and pressure are applied by a heating roll, and a color image toner resin having high color development and excellent melting properties is used. It is known that since the glass transition temperature (T _g ) is relatively low, a phenomenon of fusing to the fixing roll (hot offset) and a phenomenon of adhering to the fixing roll when the fixing temperature is low (cold offset) occur. . In order to prevent these problems, in an electrophotographic recording system, a releasing agent such as silicone oil is impregnated, applied, or added to a fixing roll.

However, when silicone oil is added to the fixing roll, the silicone oil adheres to the image recording medium, so that the writability on the image is reduced, the adhesion of the adhesive tape is poor, and the texture due to stickiness is reduced. This causes various problems such as deterioration, reduction in the permeability of the OHP sheet, and reduction in the wear strength of the fixing roll due to oil impregnation.

Therefore, conventionally, in order to impart oil-less performance to the fixing device and to prevent offset by the toner resin, organic waxes such as polyethylene wax and polypropylene wax and natural waxes such as carnauba wax have been used. A method of mixing various release agents into toner has been proposed.

Such mixing of the release agent is present at the interface with the fixing roll due to the precipitation of the release agent on the surface of the image recording medium or the toner, and lowers the affinity between the fixing roll and the toner. Accordingly, it is intended to prevent the toner from being fused or adhered to the fixing roll.

However, when these release agents are deposited on the surface of the image recording material or the toner, the color developing property of the color toner is reduced, and if the release agent remains on the surface of the image recording material, an unpleasant touch is felt. This causes problems such as occurrence of printing, poor printing of the aqueous ink on the image recording medium, and inhibition of sticking of a sticky note or an adhesive tape. In particular, in the case of an OHP sheet, since measures such as increasing the thickness of the image receiving layer and lowering the glass transition temperature (T _g ) are taken for the purpose of improving the image quality, the adhesion to the fixing roll further increases. And
In addition, the presence of the release agent in the vicinity of the image recording material or the toner and the image recording material causes problems such as not only image deterioration such as color developability but also remarkable decrease in transmittance.

It has been reported that the incorporation of a release agent into the toner changes the charging performance of the toner and degrades the powder fluidity and thermal stability of the toner. It is required that the mixing amount of the release agent be reduced or not mixed. Due to such problems, in printing by an electrophotographic recording method, addition of silicone oil or the like to a fixing roll is reduced as much as possible (oil-less), and the glass transition temperature (T _g ) is reduced to improve image quality. It is required to use a low toner resin. That is, it is desired to form a high quality image without using a toner resin having a low glass transition temperature (T _g ) and fusing the toner to the fixing member.

On the other hand, in the case of an OHP sheet for a color image in which an image receiving layer having a high affinity for toner is formed on the surface of the base material, not only the entire surface of the image recording material comes into contact with the fixing roll but also the light transmitting property. In order to improve the toner, the fixing temperature is increased or the fixing speed is decreased to improve the melting characteristics of the toner, so that the offset phenomenon to the fixing roll is more likely to occur.

Further, an increase in energy consumption due to an increase in the fixing temperature and a decrease in productivity due to a decrease in the fixing speed are serious problems in color copiers and color printers.

In the case of a color image OHP sheet, if the fixing speed is increased to the same level as that of plain paper, air existing in the toner layer constituting the unfixed image is fixed in the color image portion having a high image density. In the process (fixing nip), the toner cannot be discharged, so that air bubbles are left behind at the end of the fixed image, and as a result, a phenomenon (toner blister) that causes fogging of the transmitted image may occur.

Further, in order to reduce the fluctuation of the image density due to the unevenness of the surface of the image recording medium, a coated paper in which the surface of the image recording medium is coated with an inorganic pigment or an organic pigment is conventionally used for the purpose of improving the surface smoothness. Have been. Although such coated paper can provide high image quality, by increasing the amount of coating, air existing in the image recording body cannot be escaped in the fixing step, and the coating layer is not removed when air escapes. Phenomena (paper blister) may occur.

Conventionally, the only way to prevent "toner blister" or "paper blister" on coated paper, OHP film, or the like, is to reduce the process speed (fixing speed).

In Japanese Patent Application Laid-Open No. 9-325631, a coated paper (coated paper) judging means is provided before passing through a fixing nip formed in a press-contact area of a heat fixing member and a press-contact member. If it is determined that the temperature of the image recording medium is preheated to 60 ° C. or more, the above problem can be solved.

However, such means not only significantly lowers the copying and printing speed and lowers the productivity, but also necessitates a two-mode speed, complicates the process itself, and increases the cost of the image forming apparatus. Cost will increase.

Since the surface of the coated paper has less surface irregularities than the plain paper, the glossiness is generally high. When the toner image is fixed on the coated paper surface, the toner image density is high (solid image)
The portion has a higher gloss than the surface of the coated paper, but the portion having a low image density (a so-called highlight image) tends to have a lower gloss than the surface of the coated paper due to scattering of light by an isolated image or the like. In such an image, the glossiness greatly changes depending on the image density, and the glare of the solid image portion is emphasized.

On the other hand, in the ink jet recording system, ink droplets are made to fly by various operating principles and adhere to an image recording medium such as paper to form dots and perform recording. The ink jet recording method has characteristics such as high speed, low noise, and easy multi-coloring; great flexibility in recording patterns; no need for development and fixing; In the field of information equipment such as a hard copy device for color images and the like, it is rapidly spreading. In an office or the like, an ink jet recording system is used for multicolor printing or simple printing of a small number of copies, and a copier or the like of an electrophotographic recording system is used for copying or high-speed monochrome printing. It has been done.

From the above background, the quality and performance required for the image recording medium of the ink jet recording system are not the same as the quality and performance required for the image recording body of the electrophotographic recording system. Therefore, they are manufactured and sold individually. If devices that use different image recording media due to differences in recording methods are installed in the same place, image recording media that have no apparent difference must be individually stored and managed, and must be set in the device without error when used.
For this reason, there has been a problem that erroneous setting frequently occurs and printing is not performed properly if an image recording medium is selected incorrectly. In addition, the manufacturer of the image recording medium also has to produce various types of recording medium in accordance with the recording method, which leads to an increase in production cost.

The recording paper (image recording medium) for ink jet manufactured and sold is roughly classified into a coated paper type recording paper and a general high quality paper type recording paper. Coated paper type recording paper is mainly formed such that a coating layer coated with a filler or the like and a binder is formed on the surface of the paper, and ink is absorbed in fine gaps between the coating layers. Due to the formation of the coating layer, the spread of the ink dots is small, the shape is close to a circle, and the resolution is good, but the amount of ink absorbed is reduced and the ink absorption speed is reduced. However, it is unsuitable for multicolor printing using, and the cost is high. Then, when writing on a printed sheet with a writing tool such as a pencil or a fountain pen, the ink receiving layer on the surface of the recording sheet was scraped, and writing could not be performed normally. Further, at the time of paper feeding, the coating layer was broken due to friction in the recording device, a part where good printing could not be performed due to paper dusting occurred, the environment was deteriorated, and sometimes the equipment was broken. .

Further, the recording paper of the general high-quality paper type absorbs ink in the cellulose fibers themselves, or between the fibers or the gap formed by the filler and the fibers. This is apparently similar to plain paper (PPC), but is usually kept low in size to improve ink absorption. Therefore, the ejected ink does not stay near the recording surface of the recording paper, but penetrates deeply into the paper layer, and the color density tends to be low due to the scattering of light in the upper layer of the recording paper, and the ink has a low density. In some cases, it reaches the back surface and causes strikethrough. In addition, the ink
The ink penetrates in the depth direction and bleeds in the horizontal direction at the same time, so that the ink dot diameter increases and the resolution decreases. Conversely, when the size is increased, the recording density and resolution are improved, but the ink absorbency is reduced.

In recent years, as devices such as various types of printers, facsimile machines, and copiers using the ink jet recording system have become widely available on the market, higher quality recording papers have been demanded. . In other words, the ink ejection speed has been increased, and the amount of ink per dot has been increased, so that a recording sheet having more excellent ink absorbability and excellent ink drying and fixing properties is required.

By the way, various kinds of recording paper for ink jet are known. For example, Japanese Unexamined Patent Publication No. 53-49113 discloses a high-quality paper type in which a water-soluble polymer is impregnated in a sheet containing a urea-formalin resin powder and improves ink absorbency. However, it is easy to blur around the dots, and it is difficult for the ink to penetrate deeply into the paper layer, so that the ink density is hard to come out. Printing with proper ink density is not possible. In addition, since it is intended for ink jet recording, the suitability for the electrophotographic recording method is not considered. Particularly, since the urea-formalin resin used as the internal additive is a thermosetting resin, Problems may be considered, such as affecting the affinity for the toner (heat-fusible resin), which is an image forming material of the photographic recording system, and the fixing characteristics.

Japanese Patent Application Laid-Open Nos. 5-117921 and 5-221 disclose recording sheets having characteristics that can be used in both the electrophotographic recording method and the ink jet recording method.
No. 113 is known. Japanese Patent Laid-Open No. 5-
No. 117921 discloses a base paper containing a calcium carbonate as a filler and containing an alkyl ketene dimer or an alkenyl succinic anhydride as an internal sizing agent, and having a Stekigt sizing degree of 10 to 20 seconds. The recording paper is characterized in that the surface is coated with a surface sizing agent containing at least one of a styrene-acryl copolymer, a nonanol-based or a nonylphenol-based penetrant, and a water-soluble polymer. JP-A-5-221113 discloses a base paper having a Stockigt sizing degree of 2 to 15 seconds containing calcium carbonate as a filler and a cationic sizing agent as an internal sizing agent. Agent is a copolymer of styrene or a derivative thereof and an acrylate or methacrylate, and the base paper surface is coated with a surface sizing agent and a surface sizing agent comprising a water-soluble polymer. Characteristic recording paper. They are,
Although intended to be used as electrophotographic copying paper and ink jet recording paper,
It does not fully satisfy all the required items such as prevention of "bleeding of image" and "through print" and proper printing of ink density.

Under such circumstances, development of an image recording medium suitable for an electrophotographic recording system and usable for an inkjet recording system device is required.

[0028]

The present invention has printing suitability for both the electrophotographic recording system and the ink jet recording system, and particularly, in the electrophotographic system, a toner blister or a paper blister phenomenon occurs. It is capable of printing images at high speed without any need, and has the ability to fix toner images sufficiently. In the case of the ink jet recording system, it has excellent ink absorbency and color development, and has the ability to prevent ink bleeding. It is an object to provide a recording medium and a method for manufacturing the image recording medium.

[0029]

In order to obtain an image recording medium having printability in both the electrophotographic recording system and the ink jet recording system, it is necessary to have a high affinity for the toner and the surface of the image recording body. It is necessary to give the surface layer a sizing property such that the ink adhered to the paper layer does not spread in the plane direction on the surface of the paper layer, and to give the image recording medium such that the ink is absorbed sufficiently quickly in the thickness direction of the paper.

As a result of extensive studies, the present inventor has found that a toner image as an image forming material can be sufficiently formed on an image recording medium such as a plain paper recording paper, a processed paper, and a polyester film used for an OHP sheet. In order to fix and obtain a high quality image with high productivity (high speed), the air existing in the toner layer constituting the unfixed image or the paper in the image receiving layer formed on the surface of the image recording medium is required. Turned out to be as quick as possible. Further, it has been found that it is necessary to impart low adhesion to the fixing member in order to prevent the image recording medium from adhering to the fixing member.

Therefore, the present inventor has proposed a resin particle made of a hot-melt resin, a binder resin for adhering the resin particle to the surface of the base material,
Found that it is possible to form an image-receiving layer having many voids between resin particles by applying a coating liquid comprising on the substrate surface and forming a film while maintaining the shape of the resin particles. Was. Many small voids in the image receiving layer can prevent "toner blister" and "paper blister" by allowing air in the toner layer forming an unfixed image to escape backward in the process direction. Furthermore, it has been found that even when paper is used as the base material, air in the paper is released through these minute voids. The present invention has been completed based on these findings. That is, the present invention provides: <1> an image receiving layer formed of at least resin particles made of a heat-fusible resin and a binder resin for bonding the resin particles to the surface of the base material; An image recording medium characterized by being processed.

<2> The image recording body according to <1>, wherein the resin particles are produced by kneading, pulverizing, and classifying a hot-melt resin.

<3> The image recording medium according to <1>, wherein the resin particles are produced by a polymerization method.

<4> The image recording body according to <1>, wherein the resin particles are produced by a solution emulsification method.

<5> The resin particles according to <1>, wherein the resin particles contain a surfactant and / or a charge control agent.
> To <4>.

<6> The image recording body according to any one of <1> to <5>, wherein the resin particles contain a release agent.

<7> The image recording body according to any one of <1> to <6>, wherein the image receiving layer contains white metal oxide fine particles or a white pigment.

<8> The image recording material according to any one of <1> to <7>, wherein the substrate is a paper or a plastic film.

<9> Further, a conductive layer is provided between the base material and the image receiving layer.
8>.

<10> An image recording material according to any one of <1> to <9>, wherein the image receiving layer of the image recording material contains a matting agent.

[0041] <11> 25 ° C., is an image recording material according to <1> to <10>, wherein the surface electric resistance of 65% RH is ^{1 × 10 8 ~1 × 10 1} 4 Ω .

<12> The method for producing an image recording medium according to any one of <1> to <11>, wherein at least resin particles made of a heat-meltable resin and a binder for bonding the resin particles. A method for producing an image recording body, comprising a step of applying a coating liquid comprising a resin and a solvent to a surface of a base material to form an image receiving layer.

<13> The method for producing an image recording medium according to <12>, wherein the resin particles made of the heat-fusible resin are produced by a solution emulsification method.

[0044]

BEST MODE FOR CARRYING OUT THE INVENTION The image recording medium of the present invention comprises at least resin particles composed of a heat-meltable resin and a binder resin for bonding the resin particles to the substrate surface. An image receiving layer is formed. Hereinafter, the image recording body of the present invention and the method of manufacturing the same will be described. Further, a method of forming an image using the image recording body of the present invention by taking an electrophotographic recording method as an example will be described.

{Image Recording Body} The image recording body 1 of the present invention comprises:
As shown in FIG. 1, it is composed of at least a substrate 2 and an image receiving layer 3 provided on the surface. If necessary, a conductive layer (not shown) may be provided between the base material 2 and the image receiving layer 3. Hereinafter, the substrate 2, the image receiving layer 3, and the conductive layer will be described.

<1. Image receiving layer 3> Image receiving layer 3 provided on the surface of base material 2 includes at least binder resin 4
And resin particles 5 made of a heat-meltable resin, and there are many voids between the resin particles 5.

(1. Resin particles 5 made of hot-melt resin)
The resin particles 5 made of a heat-fusible resin (hereinafter, may be simply referred to as “resin particles”) are preferably made of a heat-fusible resin that is in a hot-melt state in a fixing temperature range in a fixing nip. It is preferable to use the binder resin 4 used for the image forming material because of the variety of selection, stability, cost, ease of the manufacturing process and the like. The molecular weight of the resin particles 5 is preferably about 1,000 to 1,000,000.

In the fixing step, the resin particles 5 are heat-melted at the same time as the image forming material (toner) and are fixed to the image recording body 1, so that the obtained fixed image has a sufficient strength. Further, even if fluctuations that affect the toner fixability such as image density, fixing conditions (process speed, fixing temperature), and environmental fluctuations occur, the resin particles 5 behave in the same manner as the toner. Has uniformity without gloss variation.

The heat-fusible resin constituting the resin particles 5 can be used without any particular limitation as long as it is used as an image forming material. Specifically, styrenes such as styrene, vinyl styrene, and chlorostyrene; monoolefins such as ethylene, propylene, butylene, and isobutylene;
Vinyl esters such as vinyl acetate, vinyl propionate, vinyl benzoate and vinyl butyrate; methyl acrylate, ethyl acrylate, butyl acrylate, dodecyl acrylate, octyl acrylate, phenyl acrylate, methyl methacrylate, ethyl methacrylate Esters of α-unsaturated fatty acid monocarboxylic acids such as butyl methacrylate and dodecyl methacrylate; vinyl ethers such as vinyl methyl ether, vinyl ethyl ether and vinyl butyl ether; vinyl methyl ketone, vinyl hexyl ketone,
Vinyl ketones such as vinyl isopropenyl ketone; homopolymers or copolymers obtained by polymerizing one or more diene monomers such as isoprene and 2-chlorobutadiene; and the like. Among these, styrenes, α
-Esters of unsaturated fatty acid monocarboxylic acids and the like are preferably used. Further, polyester, polyurethane resin and the like can be used alone or in a mixed form.

Also, polyester can be suitably used as the heat-fusible resin. The polyester which can be used as the hot-melt resin can be produced by reacting a polyhydroxy compound with a reactive acid such as a polybasic carboxylic acid or a reactive acid derivative thereof. As the polyvalent hydroxy compound constituting the polyester,
For example, ethylene glycol, diethylene glycol,
Diols such as triethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, and 1,4-butanediol; bisphenols such as hydrogenated bisphenol A, polyoxyethylenated bisphenol A, and polyoxypropylene-modified bisphenol A A alkylene oxide adducts; dihydric phenols such as bisphenol A; other divalent hydroxy compounds;

The polybasic carboxylic acids include, for example, malonic acid, succinic acid, adipic acid, sebacic acid, alkyl succinic acid, maleic acid, fumaric acid, mesaconic acid,
Citraconic acid, itaconic acid, glutaconic acid, cyclohexanedicarboxylic acid, phthalic acid, isophthalic acid, divalent carboxylic acids such as terephthalic acid, or anhydrides thereof;
Reactive acid derivatives such as alkyl esters and acid halides are exemplified.

In order to make the polymer non-linear to these divalent hydroxy compounds and divalent carboxylic acids to the extent that tetrahydroxyfuran insolubles do not occur, trivalent or higher polyvalent hydroxy compounds and / or trivalent or higher trivalent hydroxy compounds are used. Polybasic carboxylic acids can be added. Among these polyesters, a linear polyester resin comprising a polycondensate containing bisphenol A and an aromatic polycarboxylic acid as main monomer components can be particularly preferably used.

The properties of the polyester include a softening point of 90
To 150 ° C, glass transition temperature 50 to 80 ° C, number average molecular weight 2000 to 6000, weight average molecular weight 8000 to 15
000, an acid value of 5 to 30, and a hydroxyl value of 5 to 40 are particularly preferable.

In order to prevent the image recording medium from adhering to and wrapping around the fixing member, the resin particles 5 contain a release agent such as a natural wax, a synthetic wax, or a release resin, which is a material having low adhesion to the fixing member. It is preferred that

Specific examples of the natural wax include carnauba wax, beeswax, montan wax, paraffin wax, and microcrystalline wax. Specific examples of the synthetic wax include low molecular weight polyethylene wax and low molecular weight oxidized polyethylene wax. Low-molecular-weight polypropylene wax, low-molecular-weight oxidized polypropylene wax, higher fatty acid wax, higher fatty acid ester wax, sasol wax and the like. These may be used alone or in combination of two or more.

Specific examples of the release resin include a silicone resin; a fluorine resin; a modified silicone resin which is a modified product of a silicone resin and various resins, such as a polyester-modified silicone resin, a urethane-modified silicone resin, and an acrylic resin. Modified silicone resin, polyimide-modified silicone resin, olefin-modified silicone resin, ether-modified silicone resin, alcohol-modified silicone resin,
Modified silicone resins such as a fluorine-modified silicone resin, an amino-modified silicone resin, a mercapto-modified silicone resin, and a carboxy-modified silicone resin; a thermosetting silicone resin; a photocurable silicone resin;
The modified silicone resin has a high affinity for the toner resin or the resin particles 5 as an image forming material, and is appropriately mixed, compatible and melt-mixed, so that the pigment contained in the toner is excellent in color development, and at the same time, Due to the release property of silicone resin,
This is preferable in that the fixing member and the image recording medium can be prevented from adhering during thermal melting.

In order to further reduce the adhesion to the fixing member, a reactive silane compound and a modified silicone oil may be mixed into the resin particles 5. The reactive silane compound undergoes a curing reaction with the resin constituting the image receiving layer 3 and is firmly fixed in the image receiving layer 3 as a release agent, so that the reactive silane compound falls off due to mechanical abrasion, solvent extraction, or the like. Nothing. In addition, the reactive silane compound reacts with the modified silicone oil to act as a mold release agent that further improves the performance of the silicone oil as a liquid lubricant.

These release agents such as wax and release resin may be coexisted in the form of particles, as in the case of the resin particles 5 made of the heat-fusible resin, but are preferably added to the heat-fusible resin. However, it is preferable to use the resin particles in a state of being dispersed and compatible with the resin particles 5.

The image recording medium of the present invention comprises at least resin particles 5 made of the above-mentioned hot-melt resin, a resin for bonding the resin particles 5 to the surface of the base material 2 (binder resin 4 described later), Is applied to the surface of the substrate 2 to form a coating while maintaining the shape of the resin particles 5. The image receiving layer 3 has a large number of minute voids, and if the binder resin 4 is made hydrophilic, when the image recording medium 1 of the present invention is used for ink jet, sufficient ink absorbing property is obtained. And ink drying property is exhibited.

(2. Binder resin 4) Image recording body 1 of the present invention
The binder resin 4 used for the image receiving layer 3 is for adhering the resin particles 5 to the surface of the base material 2 and is preferably a hydrophilic one. Specifically, various modified starches such as oxidized starch, phosphate esterified starch, cationized starch, self-modified starch; polyethylene oxide, polyacrylamide, sodium polyacrylate, sodium alginate, hydroxyethyl cellulose, methylcellulose, polyvinyl alcohol or the like And water-soluble polymers such as derivatives; Further, the water-soluble polymer can be used by mixing several kinds of resins according to the purpose. Specifically, it does not dissolve the resin particles 5 made of a heat-fusible resin, such as alcohols such as methyl alcohol, ethyl alcohol, and isopropyl alcohol; acetates such as ethyl acetate and butyl acetate; ethers such as diethyl ether; A resin that can be dissolved in a solvent and bind the resin particles 5 to the surface of the base material 2 can be used. More specifically, polyacetates such as vinyl acetate and polybutyl acetate can be used. The content of the binder resin 4 is preferably 1 to 300% by weight based on the resin particles 5, and is preferably 1 to 300% by weight.
The content is more preferably 0 to 150% by weight.

(3. Other Components) When a plastic film is used as the base material 2 of the image recording medium 1, the surface resistance of the surface layer is set to 25 ° C. in order to prevent image deterioration due to environment such as temperature and humidity. , 65% RH (relative humidity), preferably in the range of 1 × 10 ⁸ to 1 × 10 ¹⁴ Ω. As a method for setting the content within this range, it is preferable to add a surfactant, conductive oxide fine particles, and the like to the image receiving layer 3. Further, in order to improve the transportability, the image receiving layer 3 preferably contains a matting agent.

By adding a surfactant or a conductive oxide fine particle as a charge controlling agent to the image receiving layer 3 of the image support of the present invention, the surface resistance as an image recording body required in the electrophotographic recording system can be reduced. Can be secured. When a surfactant is added, the absorptivity of the inkjet ink, the spread of the ink, and the bleeding can be controlled by the surfactant. When a conductive inorganic oxide is added, further improvement in ink absorbency is expected due to voids present on the surface.

As the surfactant, for example, an ethylene oxide nonionic surfactant is used. As the material of the conductive oxide fine particles, ZnO, TiO, Ti
O ₂ , SnO ₂ , A1 ₂ O ₃ , In ₂ O ₃ , SiO, Si
O ₂ , MgO, BaO and MoO ₃ can be mentioned. These may be used alone or a composite oxide thereof may be used. In addition, the conductive oxide fine particles,
Those further containing a different element are preferable, for example, Zn
Al, In etc. for O; Nb, Ta for TiO
Sb, Nb, halogen element, etc. with respect to SnO ₂ ;
Is preferable (doping). Among these, SnO ₂ doped with Sb is particularly preferable because the change in conductivity with time is small and the stability is high.

As the matting agent contained in the image receiving layer 3, a resin having lubricity can be used. Examples of the lubricating resin used as the matting agent include polyolefins such as polyethylene; fluororesins such as polyvinyl fluoride, polyvinylidene fluoride, and polytetrafluoroethylene (Teflon (registered trademark));
And the like.

As an example of the fluororesin, a polytetrafluoroethylene (PTFE) dispersion can be mentioned. Further, when the matting agent is a fluororesin, the volume average particle diameter is preferably in the range of 0.1 to 10 μm, particularly 1 to 5 μm.
The range of m is preferred. The volume average particle diameter is preferably larger, but if it is too large, the matting agent is detached from the image receiving layer 3 to cause a powder falling phenomenon, and the surface is easily worn and damaged,
The above range is preferable because haze (haze degree) further increases. In this case, the content of the matting agent is preferably from 0.1 to 10% by weight, more preferably from 0.5 to 5% by weight, based on the total solid content of the image receiving layer 3. Here, the matting agent protrudes from the surface of the image receiving layer 3 in a convex shape,
It is preferable that the surface of the image receiving layer 3 has irregularities as a whole. Other than the above, SiO ₂ , A
inorganic fine particles such as l ₂ O ₃ , talc, kaolin, etc .;
Bead-shaped plastic powders such as MMA (polymethyl methacrylate), polycarbonate, polyethylene terephthalate, and polystyrene may be used in combination.

(4. Conductive Layer) In order to prevent image deterioration due to environment such as temperature and humidity and to set the surface resistance of the image recording body 1 within a predetermined range, as described above, the image A surfactant or conductive oxide fine particles may be added, but instead of adding a surfactant or conductive oxide fine particles, a conductive layer is provided between the substrate 2 and the image receiving layer 3. You may. Further, a conductive layer may be provided between the image receiving layer 3 to which the surfactant and the conductive oxide fine particles are added and the substrate 2.

The conductive layer is preferably formed by dispersing the above-mentioned surfactant, conductive oxide fine particles and the like in a binder resin. As the binder resin constituting the conductive layer, a conventionally known binder resin can be used, but the image receiving layer 3 provided on the conductive layer can be used.
It is preferable to use a resin having the same physical properties as the resin forming the resin, and specific examples thereof include a polyester resin and an acrylic resin. In addition, the thickness of the conductive layer is 0.1 mm.
The thickness is preferably 1 to 10 μm. The conductive layer can be formed by a known method in which a solution in which the surfactant, the conductive oxide fine particles, and the like are dissolved is applied using an applicator or the like.

<2. Substrate 2> The substrate 2 that can be used in the image recording medium 1 of the present invention includes plain paper recording paper used in an electrophotographic recording system; inkjet recording paper used in an inkjet recording system; Processed paper and lightly coated paper; transparent films such as polyester films and styrene-acrylic resins used in OHP sheets and the like; and white films in which white pigments and the like are added thereto. In addition to paper and plastic films such as plain paper and coated paper, metal and ceramics formed into a film shape can be used.

When paper is used for the base material 2, the pulp used for paper includes, for example, chemical pulp and waste paper pulp. As the chemical pulp, for example, hardwood bleached kraft pulp, hardwood unbleached kraft pulp, hardwood bleached sulphite pulp, softwood bleached kraft pulp, softwood unbleached kraft pulp, softwood bleached sulphite pulp, wood and other fiber materials such as soda pulp Virgin bleached chemical pulp that has been chemically treated and made through a bleaching step is preferred, and those with high whiteness are particularly preferred. Further, as the waste paper pulp, for example, unprinted waste paper such as cut-off, waste paper, width-reduced waste paper, white paper, special white paper, medium white paper, white paper loss, etc. generated in bookbinding, printing plants, cutting shops, etc. is dissociated. Waste paper pulp,
Printing of lithographic, letterpress, intaglio, etc. on high quality paper, high quality coated paper, medium quality paper, medium quality coated paper, reprinted paper, etc., electrophotographic recording, ink jet recording, thermal recording, thermal transfer recording, etc., pressure recording Old paper printed on paper, carbon paper, etc .;
Waste paper pulp that has been de-inked with an optimal method for each waste paper after dissociating waste paper written with water-based, oil-based ink or pencil; newspaper waste paper; etc., and lithographically printed waste paper pulp that is relatively easy to deink Among them, waste paper pulp having high whiteness and low in impurities is preferred.

The paper as the base material 2 is porous and easily penetrates the liquid. Therefore, in order to apply the coating liquid for forming the image receiving layer 3 uniformly and thinly, the paper is subjected to a filling treatment. May go. As a filling treatment, a solution in which each of polyethylene, clay binder, polyvinyl alcohol (PVA), starch, carboxymethyl cellulose, etc. is dissolved or dispersed is applied to paper in advance and dried to form respective coatings. It is performed by

When there is a concern that the resin film as the image receiving layer 3 makes the paper transparent and impairs the feeling and whiteness of the paper, it is preferable to use a white metal oxide such as silicon oxide, titanium oxide or calcium carbonate. The whiteness of the paper can be maintained by adding fine particles or white pigments to the image receiving layer.

When a plastic film is used as the substrate 2, the light-transmitting film that can be used particularly for the OHP sheet includes an acetate film, a cellulose triacetate film, a nylon film, a polyester film, a polycarbonate film, and a polystyrene film. It is preferable to use a film, a polyphenylene sulfide film, a polypropylene film, a polyimide film, a cellophane, etc.
From a comprehensive viewpoint such as physical and chemical properties and processability, a polyester film, particularly, a biaxially stretched polyethylene terephthalate film is preferably used.

{Method of Manufacturing Image Recording Body 1} The method of manufacturing the image recording body 1 of the present invention includes at least resin particles 5 made of a heat-meltable resin and a binder resin 4 for bonding the resin particles 5. And a step of applying a coating liquid comprising a solvent and a solvent to the surface of the substrate 2 to form the image receiving layer 3.

The method for obtaining the resin particles 5 is as follows.
There are two ways. The first method is to mix additives such as a hot-melt resin and a charge control agent, a release agent, and knead, pulverize,
The resin particles 5 are produced by classification or the like. This is a so-called pulverized toner manufacturing method, and a conventionally known pulverized toner manufacturing method can be applied as it is, except for the materials used.

The second method is to produce resin particles 5 by a polymerization method. The polymerization method is a polymerization method used when producing a general toner excluding a colorant, and includes a suspension polymerization method and an emulsion polymerization method. In the case of the suspension polymerization method, a mixed solution is prepared by mixing a heat-meltable resin monomer and a polymerization initiator in an aqueous solvent, and polymerized by heat or light to obtain a solution in which the resin particles 5 are dispersed. In the case of the emulsion polymerization method, an emulsifier is added to the mixed solution, and emulsion polymerization is performed to obtain a solution in which the resin particles 5 are dispersed. In any of the polymerization methods, the particle size of the resin particles 5 can be controlled by adjusting the polymerization conditions such as the polymerization initiator concentration, the polymerization temperature, and the polymerization time. These methods are so-called wet methods for producing a toner, and a conventionally known wet method can be applied as it is.

A third method is a dissolution emulsification method (melt dispersion method). First, a hot-melt resin is dissolved in an organic solvent, and the resulting solution is dropped into an aqueous solution. The solvent is removed to produce the resin particles 5. At this time, a dispersant or the like may be added. Examples of the organic solvent used include esters such as ethyl acetate and butyl acetate. The particle size of the resin particles 5 can be controlled by adjusting conditions such as a shearing force, a reaction temperature, and a concentration of a dispersant. This method also
This is a so-called wet manufacturing method of the toner, and a conventionally known wet manufacturing method can be applied as it is.

In the second or third method, the resin particles 5 containing the additive can be produced by polymerizing and synthesizing the additive (other components) in a mixed state. In these methods, the resin particles 5 can be prepared in an aqueous solution. Therefore, even if the resin particles 5 are not taken out again, by adding the binder resin 4 (water-soluble resin) or the like to the aqueous solution, the coating can be performed. It can be a liquid. On the other hand, the coating liquid containing the resin particles 5 prepared by the first method can be obtained by dispersing the resin particles 5 in water or an organic solvent and dissolving the binder resin 4 in the dispersion. In addition, as the organic solvent used, methyl alcohol, ethyl alcohol,
Alcohols such as isopropyl alcohol; acetic esters such as ethyl acetate and butyl acetate; ethers such as diethyl ether;

In the coating liquid, the resin particles 5 and the binder resin 4
And the mixing weight ratio (resin particles 5 / binder resin 4) is 100
/ 1/1/300 is preferred, and 10/1 to 100/15
0 is more preferred. The solid content (resin particles 5 + binder resin 4) concentration in the coating liquid is preferably 1 to 50% by weight, more preferably 5 to 30% by weight.

In the method (first method) by kneading, pulverizing, classifying, etc., the toner size (volume average particle size is about several μm to several tens μm, from the viewpoint of the production efficiency of the resin particles 5,
Although it is preferable to obtain the resin particles 5 having a particle size of 3 to 20 μm), in the second method and the third method, by adjusting the synthesis conditions, the resin particles 5 having a wide particle size distribution can be obtained.
Can be manufactured, and shape control and the like are easy. The volume average particle diameter of the resin particles 5 produced by the second method or the third method is preferably from 1 to 50 μm, more preferably from 3 to 20 μm.

In order to form the image receiving layer 3 by applying a coating liquid containing the resin particles 5 and the like prepared by any one of the first to third methods to the surface of the substrate 2, the coating liquid It is preferable to adopt a method of applying or impregnating the surface of the substrate 2. As a method of applying or impregnating, a commonly used method such as a blade coating method, a wire bar coating method, a spray coating method, a dip coating method, a bead coating method, an air knife coating method, a curtain coating method, and a roll coating method is employed. Is done. At this time, the thickness of the image receiving layer 3 is preferably 0.1 μm or more for the stability of the film formation, and more preferably 0.5 μm or more for the stable formation of minute voids.

The size of the minute gap is adjusted by the shape, particle size, filling rate (the amount of the resin particles 5 formed in the image receiving layer 3) of the resin particles 5 constituting the image receiving layer 3 of the image recording medium 1, and the like. The voids become smaller as the shape of the resin particles 5 is closer to a sphere, the particle size is smaller, and the filling rate is higher. Also, the size of the void can be adjusted by adjusting the amount of the binder resin 4 that binds the resin particles 5.

The drying after the image receiving layer 3 is provided on the surface of the substrate 2 may be air drying, but drying can be easily performed by heat drying. As a drying method, a commonly used method such as a method of placing in an oven, a method of passing through an oven, or a method of contacting with a heating roller is employed.

{Image Forming Method} A method of forming an image using the image recording medium of the present invention, taking an electrophotographic method as an example, will be described below.

An image is formed on paper as an image recording medium by an electrophotographic method by uniformly charging and charging the surface of an electrophotographic photosensitive member, and exposing the surface to image information.
An electrophotographic latent image corresponding to the exposure is formed. Next, toner is supplied to the electrophotographic latent image on the surface of the photoreceptor from a developing device to visualize and develop the electrophotographic latent image with the toner. Further, the electrophotographic latent image is transferred to a recording medium such as paper. The toner is fixed to the image recording body by heat, pressure, or the like from the member, and an image is formed.

At the time of fixing, heat and pressure are simultaneously applied to the toner, and the toner is fixed on recording paper as an image recording medium.
At the same time, the toner contacts the fixing member. If the toner has a low viscosity or has a high affinity for the fixing member, the toner partially migrates to the fixing member and remains as an offset in the fixing member, causing deterioration of the fixing member. Is shortened. Therefore, as an image recording body,
It is necessary to obtain sufficient fixability of the toner image and releasability from the fixing member.

Further, the non-image portion of the image recording medium comes into contact with the fixing member in the fixing step, so that the same performance as that of the toner is required. In the image recording medium of the present invention, the same shape as the toner, the resin particles having the same heat melting properties are contained in the image receiving layer, preferably by including a release agent as an additive, The transfer performance in the electrophotographic recording system can be maintained by preventing adhesion to the fixing member in the fixing step, and more preferably by adding a charge control agent. Also, in the ink jet recording method, it is possible to ensure sufficient ink absorption and color development by the minute voids formed by the coating of the resin particles, the ink absorbency of the charge control agent added as needed, and the drying property. it can.

According to the present invention, since minute voids are present in the image receiving layer formed on the surface of the image recording medium, high-speed image printing can be performed without generating toner blisters or paper blisters. High quality electrophotography by using resin particles having the same shape and heat melting properties as toner to achieve sufficient fixability and avoiding problems caused by image quality fluctuations such as image density, fixing conditions, environmental fluctuations, etc. Images can be obtained.

As described above, by forming an image using the image recording body of the present invention in which an image receiving layer containing resin particles and having minute voids is formed, a conventional electrophotographic recording system can be used. It is possible to cope with high image quality by color images, digitization, and the like without changing the conditions. It also solves new problems such as toner blisters and paper blisters that cause image quality deterioration, wrapping of an image recording medium around a fixing member, and lowering of coloring properties, transparency, and running properties. It is possible to provide an image recording medium having no gloss fluctuation due to fluctuation. Furthermore, the image recording medium of the ink jet recording system can achieve both ink absorbability and color development, and can be used as an image recording medium for both the electrophotographic recording system and the ink jet recording system.

[0089]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto. In the examples and comparative examples, “parts” means “parts by weight”.

Example 1 (1) Preparation of Resin Particles: Polyester resin synthesized by copolymerization of a propylene oxide adduct of bisphenol A and a terephthalic acid derivative (T _m (softening point) = 100)
℃, T _g = 63 ℃, acid value 13) 80 parts Low molecular weight polyethylene wax (Mitsui socks 2203A: Mitsui Petrochemical Industries, Ltd.) 10 parts surfactant (Elegan 264W
(AX: manufactured by NOF Corporation) was melt-kneaded with a Banbury mixer, cooled, pulverized by a jet mill, and classified to prepare resin particles having a volume average particle size of 6.5 μm.

(2) Preparation of coating solution for image receiving layer: 10 parts of the resin particles prepared as described above were used as binder resin, 100 parts of a 10% by weight aqueous solution of polyvinyl alcohol, 80 parts of water, and 10 parts of ethyl alcohol. And then sufficiently stirred with a homomixer to prepare a coating liquid for an image receiving layer in which resin particles are dispersed in water.

(3) Preparation of image recording medium: This image receiving layer coating solution was coated on J paper manufactured by Fuji Xerox Co., Ltd. with a wire bar so that the dry weight became 1.5 g / m ² , ° C
After drying for 10 minutes, machine calendering was performed to produce an image recording medium.

(4) Evaluation of image recording medium: (Evaluation when image recording medium is used in electrophotographic recording system) Color copying made by Fuji Xerox Co., Ltd., in which a fixing unit has been removed from this image recording medium in advance. Machine A Co
With lor935, a color image including a solid image is printed,
A sample having an unfixed image formed on an image recording medium was prepared. Thereafter, the image recording medium on which the image in the unfixed state is formed is fixed on an oil-less fixing bench having only a fixing unit (a fixing unit offline bench without an oil supply system, which is removed from the A Color 935). As described below, (i) running property of the image recording medium, (ii) fixing property of the image, (iii) change in gloss, (iv) winding around the fixing roll (peeling property),
(V) The degree of toner blister generation was measured, and the performance as an image recording medium was confirmed. Table 1 shows the results.

(I) Runnability of the image recording body: The runnability of the image recording body was evaluated as follows: を when no paper jam or the like occurred, Δ when almost none but one in ten sheets occurred,
The case where the paper was not fed was marked as x.

(Ii) Fixing property of image: To evaluate the fixing property of the toner on the image recording medium, the image fixed by the above-mentioned electrophotographic apparatus was measured using an X-Rite 938 densitometer (manufactured by X-Rite).
In a solid image portion having a density of about 1.8 measured in
A cellophane adhesive tape (mm width: Nichiban Co., Ltd .: Cellotape) was applied at a linear pressure of 300 g / cm and 10 m / sec.
c. The ratio of the image density after peeling to the image density before peeling at the time of peeling at the following speed (hereinafter abbreviated as “OD ratio”) was evaluated as an index. The OD ratio is (image density after peeling) /
(Image density before peeling), and an image recording body for electrophotography having sufficient fixability requires an OD ratio of 0.8 or more.

(Iii) Gloss change: Gloss change is observed when a solid image portion, a highlight image portion, and a background portion without an image are observed, and when the gloss difference in the image portion is hardly conspicuous, there is no practical problem. Indicates a case where there is a slight difference in gloss between the image portion and the other portion, and indicates a case where the gloss difference is conspicuous throughout the image.

(Iv) Wrapping around the fixing roll (peeling property): Wrapping around the fixing roll is indicated by を when there is almost no winding, Δ when there is no practical problem, and X when winding around the fixing roll. did.

(V) Degree of toner blister generation: The toner blister was observed when the solid image surface was observed and almost no blister was generated. A case where a problematic toner blister occurred was evaluated as x.

(Evaluation when the image recording medium is used in the ink jet recording system) Ink jet printer (D
ekjet850c (manufactured by Hewlett-Packard Company), and the performance (optical density, ink bleeding) as an ink-jet recording paper (image recording medium) was evaluated as follows. Table 1 shows the results.

(Vi) Optical density: The optical density (hereinafter referred to as “ink O.D.
D. ”) Was measured and evaluated.

(Vii) Bleeding of ink: Immediately after printing, the image portion formed on the image recording body was immediately overwritten with a highlighter pen to evaluate whether or not bleeding occurred. ○, those that hardly bleed
A sample having no practical problem was evaluated as Δ, and a sample in which the ink bleed and the white paper portion was stained was evaluated as ×.

Example 2 (1) Preparation of release agent dispersion: 30 parts of carnauba wax (manufactured by Toa Kasei Co., Ltd.) were added to 70 parts of ethyl acetate, and the mixture was filled in a pressure vessel equipped with a stirrer and heated to 100 ° C. After warming and stirring with high shear, the mixture was rapidly cooled to prepare a release agent dispersion. The volume average particle size is 0.2
μm, and the maximum particle diameter was 1 μm.

(2) Preparation of resin particles: 30 parts of the obtained release agent dispersion, a polyester resin synthesized by copolymerization of an ethylene oxide adduct of bisphenol A and a succinic acid derivative (T _g = 66 ° C., T _m = 105 ° C) 100 parts,
Surfactant (Bionin B-144V, manufactured by Takemoto Yushi Co., Ltd.)
10 parts and 1.5 parts of ethyl acetate were mixed and stirred to prepare an oily phase. 2.5% aqueous solution of sodium carboxymethylcellulose (Cellogen BS-H, manufactured by Daiichi Kogyo Seiyaku) 10
0 parts were the aqueous phase. As a dispersion stabilizer, calcium carbonate (Luminous, manufactured by Maruo Calcium Co., Ltd.) was added to the aqueous phase so as to be 10% by weight. After adding the oily phase to the aqueous phase, the mixture was stirred to form fine particles, and then heated to remove the solvent in the oily phase. Further, after washing with an aqueous hydrochloric acid solution, washing with water was sufficiently performed, followed by filtration and drying. Release agent-containing resin particles having a volume average particle size of 7.6 μm were obtained. The release agent (carnauba wax) in the resin particles containing the release agent was 10% by weight in the solid content.

(3) Preparation of Coating Solution for Image Receiving Layer The above resin particles (10 parts) were combined with starch (10 parts) as a binder resin,
The mixture was added to a mixed solution consisting of 80 parts of water and 10 parts of isopropyl alcohol, and then sufficiently stirred with a homomixer to prepare a coating liquid for an image receiving layer in which resin particles were dispersed in water.

(4) Production and evaluation of image recording medium: This image-receiving layer coating solution was applied with a wire bar so as to be 1.0 g / m ² and dried at 80 ° C. for 10 minutes. An image recording body was produced by performing a machine calendar process. The performance of this image recording body as an image recording body was evaluated in the same manner as in Example 1. Table 1 shows the results.

Example 3 In place of the polyester resin of Example 1, a styrene-acrylic resin (T _g = 60 ° C., T _m
= 100 ° C), and resin particles having a volume average particle size of 5.2 µm were prepared in the same manner as in Example 1 except that the carnauba wax of Example 2 was used as a release agent. Using this,
An image recording body was prepared in the same manner as in Example 1, and the performance as the image recording body was evaluated in the same manner as in Example 1. Table 1 shows the results.

Comparative Example 1 An image was received from a mixed solution comprising 100 parts of a 10% by weight aqueous solution of polyvinyl alcohol, 80 parts of water, and 10 parts of ethyl alcohol as a binder resin without using the resin particles of Example 1. An image recording medium was produced in the same manner as in Example 1 except that a layer coating solution was prepared. The performance as an image recording medium was evaluated in the same manner as in Example 1. Table 1 shows the results.

(Comparative Example 2) An image-receiving layer coating solution was prepared from a mixed solution of 10 parts of starch, 80 parts of water and 10 parts of isopropyl alcohol as a binder resin without using the resin particles of Example 2. An image recording medium was produced in the same manner as in Example 2 except for the preparation. The performance as an image recording medium was evaluated in the same manner as in Example 1. Table 1 shows the results.

[0109]

[Table 1]

[0110]

As is clear from the examples, the image recording medium of the present invention has the following excellent effects. The present invention has an image receiving layer in which a resin particle made of a heat-meltable resin and a coating liquid made of a resin for binding the resin are applied to a substrate, and a film is formed in the form of the resin particles. It is an image recording medium characterized by the fact that there are a number of minute voids in the image receiving layer, these do not cause toner blister or paper blister phenomenon, enabling high-speed image printing, It has the performance as an image recording medium that sufficiently fixes a toner image. In addition, since these resin particles contain a wax for preventing adhesion to the fixing member, a charge control agent for stabilizing image transferability, and the like, image quality deterioration due to wrapping around the fixing member and poor transfer. Can also be prevented.

In the case of an ink jet recording type image recording medium, the presence of microvoids in the image receiving layer and the addition of a charge control agent improve the ink absorbency and color developability, and further prevent ink bleeding. It has helped you. Therefore, the image recording medium of the present invention can be used for both the electrophotographic recording system and the ink jet recording system.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an example of an image support of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Image support 2 ... Base material 3 ... Image receiving layer 4 ... Binder resin 5 ... Resin particles

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) // D21H 27/00 B41J 3/04 101Y F term (reference) 2C056 EA05 FC06 2H086 BA12 BA15 BA19 BA21 BA33 BA34 BA41 4F100 AA02C AJ11 AK00C AK04 AK21 AK44 AR00C AT00A BA03 BA07 BA10C CA18H CA21B CA22H DE01C DG10A GB90 JG01C JM01C YY00C 4L055 AG04 AG11 AG12 AG51 AG56 AG63 AG64 AG71 AG82 AG89 FA96 AGAA AGA A96H

Claims (13)

[Claims] 1. An image receiving layer comprising at least resin particles made of a heat-meltable resin and a binder resin for bonding the resin particles to the surface of the base material is formed on the surface of the base material. An image recording medium characterized by the following. 2. The method according to claim 2, wherein the resin particles knead a hot-melt resin,
The image recording body according to claim 1, wherein the image recording body is produced by pulverizing and classifying. 3. The image recording medium according to claim 1, wherein the resin particles are produced by a polymerization method. 4. The image recording medium according to claim 1, wherein said resin particles are produced by a solution emulsification method. 5. The method according to claim 1, wherein the resin particles contain a surfactant and / or a charge control agent.
5. The image recording body according to any one of 4. 6. The image recording medium according to claim 1, wherein said resin particles contain a release agent. 7. The image recording medium according to claim 1, wherein the image receiving layer contains white metal oxide fine particles or a white pigment. 8. The image recording medium according to claim 1, wherein the substrate is paper or a plastic film. 9. The image recording medium according to claim 1, further comprising a conductive layer between said base material and said image receiving layer. 10. An image recording material according to claim 1, wherein a matting agent is contained in the image receiving layer of the image recording material. 11. The image recording medium according to claim 1, wherein the surface electric resistance at 25 ° C. and 65% RH is 1 × 10 ⁸ to 1 × 10 ¹⁴ Ω. 12. The method for producing an image recording medium according to claim 1, wherein at least resin particles made of a heat-meltable resin and a binder resin for bonding the resin particles are used. A method of forming an image receiving layer by applying a coating liquid comprising a solvent and a solvent to a surface of a base material. 13. The method according to claim 12, wherein the resin particles made of the heat-fusible resin are produced by a solution emulsification method.