JP2003266930A - Method for manufacturing ink jet recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing an ink jet recording sheet which is outstanding in glossiness, coloring property, water resistance, high print density, ink absorbability and high fineness. <P>SOLUTION: When an ink jet recording medium with an ink receiving layer formed on a support, one or more layers are constituted as an ink receiving layer and at least one of the layers is a layer which contains silica containing secondary particles with an average particle diameter of 10 to 150 nm formed of flocculated primary particles with a particle diameter of 3 to 40 nm and/or alumina silicate fine particles and a water-soluble resin, and has a peak of the distribution curve of surface pore radii substantially adjusted to 40 nm or less. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an ink jet recording material, and more particularly, to high glossiness, ink absorption,
The present invention relates to a method for producing an inkjet recording material that is excellent in water resistance, weather resistance, high print density, and color development.

[0002]

2. Description of the Related Art The ink jet recording system is a system for recording ink droplets ejected at high speed from a nozzle by adhering it to a recording material, and has features such as easy full colorization and low printing noise. . In this method, since the ink used contains a large amount of solvent, it is necessary to use a large amount of ink in order to obtain a high recording density. In addition, since the ink droplets are continuously ejected, the next droplet is ejected before the first droplet is absorbed, and the ink droplets are likely to be fused to join the ink dots. Therefore, as a recording sheet used in this inkjet recording system, the density of print dots is high,
It is required that the color tone is bright and vivid, and that the ink does not bleed even when printing dots overlap due to fast ink absorption.

In general coated paper, a pigment having pores as a coating layer is provided as an ink receiving layer (one layer or multiple layers) to control the color quality and sharpness that determine the image quality, and the color reproducibility and The image reproducibility has been improved. For example, JP-B-5-071394 (Patent Document 1), JP-A-62-111782 (Patent Document 2), and JP-A-62.
No. 169680 (Patent Document 3), JP-A-62-227.
As disclosed in 684 (Patent Document 4), JP-A-63-013776 (Patent Document 5), and JP-A-1-097678 (Patent Document 6), primary particles or secondary particles having pores are prepared. An ink jet recording material which is used as a pigment (generally silica, alumina, etc.) and which is provided with a binder to provide an ink receiving layer is exemplified. Furthermore, for the purpose of improving the printing quality, Japanese Examined Patent Publication No. 63-22977.
As disclosed in Japanese Patent Publication (Patent Document 7), in order to increase the ink absorption rate, the uppermost layer of the ink receiving layer may have a thickness of 0.2-10.
For example, a fine pore having a peak at μm may be provided, and the absorbed ink may be introduced into a void having a pore diameter of 0.05 μm or less to provide an inkjet recording material with higher image quality. However, in response to the rapid spread of ink jet printers, there is a demand for high-gloss photographic-like recorded images for various publications and applications such as packaging. In particular, in the case of color recording, there is a strong need for films and coated paper types in terms of dot shape (roundness), dot sharpness, ink absorption, fixing speed, ink acceptability such as ink absorption capacity. . Since the ink receiving layer shown above has porosity, it is necessary to increase the size of the pigment itself or the size of the secondary particles (on the order of micron). However, when the pigment becomes large, not only the smoothness of the surface of the ink receiving layer cannot be obtained, but also the transmission of light is prevented, the ink receiving layer becomes opaque, and it has high gloss, and a recorded image similar to a photograph is obtained. There wasn't.

Many ink jet recording sheets coated with a resin that absorbs ink by dissolving or swelling for the purpose of imparting gloss are commercially available, but it is attempted to absorb the ink by dissolving or swelling such a resin. In the present case, although some gloss can be obtained, the drying speed of the ink is slow and the moisture resistance and water resistance are not good.

In order to obtain smoothness and glossiness, recently, it has been proposed that the ink receiving layer be composed of two or more layers and the upper layer be a gloss developing layer (for example, JP-A-3-215080 (Patent Document 8)). JP-A-3-256785 (Patent Document 9), JP-A-7-89220 (Patent Document 10), JP-A-7-101142 (Patent Document 11), and JP-A-7-1.
17335 (patent document 12) etc.). Colloidal silica or a composite of colloidal silica is used as the main component of these glossy layers. The gloss-developing layer that is generally used is obtained by a casting treatment (where the gloss-developing layer is in a wet state and is pressed to a heated mirror-finish roll to give a mirror-finish gloss). Pores on the surface are relatively large (on the order of microns) in order to obtain the cast surface and the ink passage speed. When the surface pores become large, the periphery of the dot of the obtained ink becomes jagged and becomes far from the perfect circle. The image is then considerably less sharp. 360 dpi x 360 dpi
720 dp, although there is no particular problem at the print level of i
At high density recording of i × 720 dpi or more, the dots were large, so the dots were joined together and a delicate image could not be obtained. In addition, since the ink fixing layer below the gloss developing layer of this type uses a pigment of several microns, there is no transparency at all and it is not possible to obtain a glossy luster.

In order to obtain smoothness and transparency, the ink receiving layer is composed of pseudo-boehmite and a binder and has a radius of 4.0.
The total volume of pores having less than 10.0 nm is 0.1
There is a proposal to provide pores of 0.4 ml / g (Japanese Patent Laid-Open No. 2-276670 (Patent Document 13)), but since the pigment used is pseudo-boehmite particles, an ink having a poor coloring property with alumina ( For example: Not suitable for Acid Red 52 (red color such as Edible Red No. 106)). In addition, the pseudo-boehmite layer itself has a problem that it tends to yellow over time. Pseudo-boehmite also has a drawback that it is not suitable for general use because of its high cost. Further, since the pseudo-boehmite particles used are primary colloidal particles, the pore volume of the entire ink receiving layer is small, and a satisfactory ink absorption rate and ink absorption capacity cannot be obtained. Therefore, JP-A-5-32037 (Patent Document 1)
4), as disclosed in JP-A-6-199034 (Patent Document 15), secondary particle aggregates of pseudo-boehmite having a particle size of 100 to 500 nm are used, and the average pore radius is 3.0 to.
Some ideas such as provision of an ink receiving layer by controlling the thickness to 10.0 nm can be seen, but since the pigment used is pseudoboehmite, the above pseudoboehmite has the drawback. Although the ink absorption capacity was improved to some extent by using secondary particles, the pore volume of the ink receiving layer obtained from the secondary particles of pseudo-boehmite was not yet sufficient, and the amount of ink ejected from the printer was large. 720 dpi x 720 dpi
In the case of the above high-definition printing, it is difficult to completely absorb the ink.

[0007]

[Patent Document 1] Japanese Patent Publication No. 5-071394

[Patent Document 2] Japanese Patent Laid-Open No. 62-111782

[Patent Document 3] Japanese Patent Laid-Open No. 62-169680

[Patent Document 4] Japanese Patent Laid-Open No. 62-227684

[Patent Document 5] Japanese Patent Laid-Open No. 63-013776

[Patent Document 6] Japanese Unexamined Patent Publication No. 1-097678

[Patent Document 7] Japanese Patent Publication No. 63-22977

[Patent Document 8] Japanese Patent Application Laid-Open No. 3-215080

[Patent Document 9] Japanese Patent Laid-Open No. 3-256785

[Patent Document 10] Japanese Patent Laid-Open No. 7-89220

[Patent Document 11] JP-A-7-101142

[Patent Document 12] JP-A-7-117335

[Patent Document 13] Japanese Patent Laid-Open No. 2-276670

[Patent Document 14] JP-A-5-32037

[Patent Document 15] Japanese Patent Laid-Open No. 6-199034

[0008]

The inventors of the present invention previously reported that an ink jet recording material having high gloss can be obtained by controlling the pore diameter to 2 to 100 nm by using colloidal silica (Japanese Patent Application No. Hei 10 (1999) -135242). 7-343835
No.). Since the colloidal silica is the primary particles, the ink absorbing portion is only between the particles, so that a high coating amount is required to obtain a high ink absorbing capacity,
There is also a problem that the coating film may crack and the coating process becomes complicated. The present invention solves the above-mentioned problems and provides a method for producing an inkjet recording material which has better color development with ink, weather resistance, water resistance, ink absorbency, high gloss, and high print density. The present invention provides a method for producing a high-gloss inkjet recording material, which has a high ink absorption speed, a large ink absorption capacity, and good ink fixability and printability.

[0009]

[Means for Solving the Problems] Some bubbles may be mixed in the ink receiving layer depending on the coating conditions, and there are variations in measuring equipment. There may be peaks,
These are all smaller than the peak of 40 nm or less. A small peak may be observed in a region where the pore radius exceeds about 6 μm, but in the ink-receiving layer pore radius distribution curve of the present invention, the peak has a peak at 40 nm or less, and a region exceeding 40 nm and up to 6 μ. Uses fine particles having substantially no peak. The pore volume having a pore radius of 40 nm or less obtained here is at least 40% or more, preferably 65% or more of the pore volume of the entire ink receiving layer. The peak of the pore distribution curve as referred to in the present invention is a peak having approximately 10% or more of the height of the maximum peak on the pore distribution curve. Exclude from peak.

General commercially available silica is a powder having a diameter of several microns and has a high ink absorbency, but it has no transparency and can be used as a general coated paper, but it can give a high print density and print gloss. It is impossible. Also, since the particle size is large,
The surface is very rough and difficult to smooth.
In the method of the present invention, silica and alumina silicate fine particles composed of secondary particles having an average particle diameter of 10 to 150 nm are used as the pigment of the ink receiving layer, and a water-soluble resin is selected as an adhesive and applied to obtain an ink receiving layer. By controlling the peak of the layer pore radius distribution curve to 40 nm or less, design a porous layer with good gloss and transparency, excellent ink absorption capacity and ink absorption rate, and the dots obtained are perfect circles. I succeeded in doing so. In particular, since the method of the present invention uses silica and alumina silicate, it is possible to obtain an ink jet recording material having a coloring property, a weather resistance and a high ink absorbability which pseudo-boehmite does not have.

The silica and alumina silicate fine particles used in the method of the present invention must be colloidal particles composed of secondary particles formed by substantially agglomerating primary particles. Ink absorbed between secondary particles having pores has relatively small pores 1
It is possible to obtain an inkjet recording material which is reabsorbed between the secondary particles and has an excellent ink absorption speed and ink absorption capacity. In the case of colloidal particles in which primary particles are monodispersed (for example: general commercially available colloidal silica), the porous layer obtained by coating the base material becomes relatively dense, and the ink is formed between primary particles. However, large primary particles must be used in order to have an ink absorption rate and an ink absorption capacity. When the particle size is large, the transparency tends to be lost, and a high coating amount is unavoidable in order to have ink absorbability. When the coating amount is high, the coating film is likely to be cracked and the coating process tends to be complicated. Of course, the fine particles of the present invention may partially contain primary particles.

Preferably, the ink receiving layer has a pore volume of 0.6.
ml / g or more, more preferably 0.7 ml / g or more, and the pore volume in the pore radius range of 3 to 20 nm is 0.3.
When it is at least ml / g, more preferably at least 0.4 ml / g, the transparency of the ink receiving layer is remarkably improved, and an ink jet recording material having a high printing density and a high gloss having an excellent ink absorption capacity and ink absorption rate is obtained. To be There is no upper limit to the pore volume of the ink receiving layer, but it can be obtained up to about 2.5 ml / g. Also, there is no upper limit for the pore volume in the pore radius range of 3 to 20 nm, but it is possible to obtain up to about 2.0 ml / g.
Further, since the entire ink receiving layer is transparent, it can be used as an OHP sheet or the like. Furthermore, when the ink receiving layer of the present invention is applied to the molding surface to form a film and then transferred onto a support through an intermediate layer, the gloss is remarkably improved, and an ink jet recording material having higher smoothness and higher gloss can be obtained. .

According to the method for producing an ink jet recording material of the present invention, at least one layer of synthetic ink and / or synthetic amorphous silica is used in forming an ink receiving layer having a layer structure of one or more layers on a support. Aggregates of particles of alumina silicate are subjected to mechanical fragmentation treatment in an aqueous medium,
A coating solution containing fine particles of synthetic amorphous silica and / or synthetic alumina silicate composed of secondary particles having an average particle size of 10 to 150 nm, which are formed by aggregating primary particles having a particle size of 3 to 40 nm, and an aqueous resin. Formed using at least one of
It is characterized in that the pore structure of the layer is controlled so that the peak of the pore radius distribution curve obtained by the mercury intrusion method is substantially 40 nm or less.

In the method for producing an ink jet recording material of the present invention, the pore structure of at least one layer constituting the ink receiving layer has a total volume of all pores of 0.6 ml / g.
It is preferable that the total volume of the pores having the pore radius of 3 to 20 nm is 0.3 ml / g or more. In the method for producing an inkjet recording material of the present invention, the ink receiving layer is formed on the support by an ink receiving lower layer containing a pigment and an adhesive, and the silica fine particles and / or the alumina silicate fine particles are formed thereon. It is preferable to form an upper layer structure by forming an ink receiving upper layer containing the aqueous resin. In the method for producing an inkjet recording body of the present invention, the ink receiving layer is coated on the molding surface to form a film, and an intermediate layer having adhesiveness or adhesiveness is separately formed on the support, and the support is formed on the support. It is preferable to transfer and bond the ink receiving layer on the molding surface via the intermediate layer.

In the method for producing an ink jet recording material of the present invention, it is preferable that the aqueous resin is polyvinyl alcohol. In the method for producing an inkjet recording material of the present invention, it is preferable that the ink receiving layer contains a cationic resin.

In the method for producing an ink jet recording material of the present invention, it is preferable that the ink receiving layer has at least two peaks of the pore radius distribution curve at 40 nm or less, and one peak at 5 nm or less. In the method for producing an inkjet recording material of the present invention, the intermediate layer is at least 1 selected from a thermoplastic resin, an adhesive and a pressure-sensitive adhesive.
It is preferable to include one. In the method for producing an inkjet recording material of the present invention, the molding surface is preferably a film having a highly smooth surface, laminated paper, glassine paper, inorganic glass or a metal surface.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The measurement of the pore radius distribution in the method of the present invention will be described. In the present invention, in order to avoid the influence of the support, after the ink receiving layer was provided on the film, the ink receiving layer was peeled off with a cutter or the like and used for the measurement. Alternatively, the ink-receiving layer may be provided on the film and measured as it is. In this case, a film whose pore distribution of the film itself can be ignored is used. The pore size distribution is, for example, Micrometrics
Pore sizer 9320 (manufactured by Shimadzu Corporation) can be used to calculate the pore size distribution (differential curve) from the void volume distribution curve obtained by the mercury porosimetry. The pore diameter was measured by the mercury porosimetry by using the following formula (1), which was derived assuming that the cross section of the pore was circular. R = −2γCOSθ / P where R: pore radius, γ: surface tension of mercury, θ: contact angle, and P: pressure, respectively.

The surface tension of mercury is 482.536 dyn /
cm, the contact angle used is 130 °, and the mercury pressure is in the low pressure part (0 to 30 psia, measured pore radius: 180 to 3 μm).
m) and a high pressure part (0 to 30,000 psia, measurement pore radius: 3 μm to 3 nm). The pore volume of the ink receiving layer is calculated from the previously measured weight of the ink receiving layer and the void volume distribution curve.

In the method of the present invention, examples of the support include films such as cellophane, polyethylene, polypropylene, soft polyvinyl chloride, hard polyvinyl chloride and polyester, fine paper, art paper, coated paper, cast coated paper. Paper such as foil paper, kraft paper, polyethylene laminated paper, impregnated paper, vapor-deposited paper, water-soluble paper, and sheets such as metal foil and synthetic paper are appropriately used.

Next, the ink receiving layer formed by the method of the present invention will be described in detail. First, in the method of the present invention, the layer containing silica or alumina silicate fine particles as a main component, which constitutes the ink receiving layer, will be described.

The silica fine particles used in the method of the present invention can be obtained by applying a strong force to a commercially available synthetic amorphous silica (several microns) by mechanical means. That is, break
It is obtained by the ing down method (method of subdividing the lump raw material). Of course, the silica fine particles used in the method of the present invention may be colloidal particles or a slurry. The silica may be cation-modified silica modified with a cationic compound such as alumina. The alumina silicate fine particles used in the method of the present invention are composite fine particles synthesized by a hydrolysis method using aluminum alkoxide and silicon alkoxide as main components, and the alumina (Al ₂ O ₃ ) component and the silica component (Si ₂ O ₃ ) are contained in the particles.
₂ ) and are contained so that they cannot be taken out separately. The molar ratio of the alumina component to the silica component is about 6: 2, but since it has an amorphous structure, it is 1: 4 to
It is also possible to synthesize in the range 4: 1 and these can also be used in the method according to the invention. Alternatively, various metal alkoxides other than alumina and silica may be appropriately added to produce various metal alkoxides composed of three components and used as the alumina silicate fine particles of the present invention. Although the alumina silicate fine particles used in the method of the present invention are synthesized in an alcohol atmosphere, they are obtained as micron-order aggregates (secondary particles) after the synthesis reaction is completed. Average particle size 1
In order to obtain a secondary particle dispersion having a particle size of 0 to 150 nm, for example, the agglomerates can be obtained by dispersing them in an aqueous solution by mechanical means.

As the mechanical means, an ultrasonic homogenizer, a high-speed rotary mill, a roller mill, a container driving medium mill, a medium stirring mill, a jet mill, a mortar, a crusher (a crushed material in a bowl-shaped container is punched and stirred). A mechanical method such as a device for grinding and kneading with a rod) or a sand grinder can be used. The average particle diameter in the present invention is a particle diameter observed by an electron microscope (SEM and TEM) (taken an electron microscope photograph of 10,000 to 400,000 times and measured and averaged the Martin diameter of particles in a 5 cm square). "Particle Handbook", Asakura Shoten, p52, 1
See 991). The average particle size of silica and alumina silicate (substantially secondary particles) used in the present invention is 10 to 15.
It is adjusted to 0 nm, preferably 20 to 100 nm. When it exceeds 150 nm, the peak of the pore radius distribution curve obtained also appears in a portion larger than 40 nm, the transparency of the ink receiving layer is remarkably lost, and the printing density is remarkably lowered.
In addition, problems such as a decrease in dot roundness occur, and an ink jet recording material having desired high gloss after printing cannot be obtained.

The average particle diameter of the primary particles constituting the silica and alumina silicate fine particles used in the ink receiving layer is 3
The average particle size is adjusted to a range of nm to 40 nm, preferably 5 to 30 nm. If the average particle diameter is less than 3 nm, the voids between the primary particles become extremely small, and the ability to absorb the solvent in the ink or the ink is significantly reduced. On the other hand, 1
When the average particle size of the secondary particles exceeds 40 nm, the particles agglomerate.
The secondary particles become large and the transparency of the ink receiving layer decreases.

Since silica and alumina silicate produced by the method of the present invention themselves do not have a good film-forming property, an aqueous resin is usually added as an adhesive (binder) when they are provided as an ink receiving layer. As the water-based resin, a water-soluble resin is preferable, for example, polyvinyl alcohol (hereinafter P
VA), polyvinylpyrrolidone, casein, soybean protein, synthetic proteins, starch, and cellulose derivatives such as carboxymethyl cellulose and methyl cellulose. A water-dispersible adhesive such as polymer latex or synthetic resin emulsion may be added. These may be used in combination of two or more. Various polyvinyl alcohols are most preferable from the viewpoint of dispersion suitability and paint stability. In particular, in order to obtain dispersibility and ink absorbency, PVA having a polymerization degree of 2000 or more is preferably used as a binder. Moreover, in order to obtain water resistance, PV with a saponification degree of 95% or more is used.
A is valid.

The solid content weight ratio of silica, alumina silicate fine particles and adhesive produced by the method of the present invention is not particularly limited, but is about 10/1 to 10/10, preferably 10/2 to.
It is adjusted to the range of 10/6. If the amount of the adhesive added is large, the pores between the particles become small, and the ink absorption speed may not be obtained. On the other hand, when the amount of the adhesive is small, the coated layer may be cracked and the peak of the pore radius distribution curve may be in the micron order, so that a delicate printed image may not be obtained.

Of course, if necessary, other pigments may be blended in addition to the specific silica and alumina silicate / adhesive (binder). For example, colloidal silica, kaolin, clay, calcined clay, zinc oxide, tin oxide, magnesium sulfate, aluminum oxide, aluminum hydroxide, calcium carbonate, satin white, aluminum silicate, smectite, zeolite, magnesium silicate, magnesium carbonate, magnesium oxide, Various publicly known pigments in the general coated paper field such as diatomaceous earth, styrene-based plastic pigments, urea resin-based plastic pigments, and benzoguanamine-based plastic pigments can be used as long as the effects of the present invention are not impaired. However, in order to make the peak of the surface pore radius distribution curve of the coating layer substantially 40 nm or less, the amount of other pigment used is adjusted to 20% or less with respect to the silica or alumina silicate fine particles of the present invention. Is preferred. Further, the average particle size of the pigment added together in the silica and / or alumina silicate sol in order to maintain the transparency of the ink receiving layer is preferably 2 μm or less.

In the method of the present invention, a cationic resin may be added to the ink receiving layer for use. Thereby, the ink fixability can be improved. Examples of the cationic resin include polyalkylenepolyamines such as polyethyleneamine and polypropylenepolyamine, or derivatives thereof, acrylic resins having a tertiary amino group or quaternary ammonium group, and diacrylamine.
The cationic resin is added in an amount of 1 to 30 parts by weight, preferably 5 to 20 parts by weight, based on 100 parts by weight of the pigment. In addition, various auxiliaries such as a dispersant, a thickener, a defoaming agent, a colorant, an antistatic agent and an antiseptic agent used in the production of general coated paper are appropriately added.

The coating amount is not particularly limited, but is 1
To 100 g / m ^2, preferably about adjusted to 5 to 60 g / m ^2. If the amount is small, it is difficult to obtain a uniform coating film, and if the amount is large, the effect is saturated and the coating film is likely to be cracked. 1
In order to obtain a high coating amount of 5 g / m ² or more, in addition to adjusting the viscosity of the coating liquid and increasing the concentration, it can be achieved by coating twice or more.

In the method of the present invention, the layer containing fine particles of silica or alumina silicate has been described, but the ink receiving layer may be a single layer or a multilayer. When the ink receiving layer is composed only of a layer containing silica and alumina silicate fine particles, color developability, print density, gloss feeling,
Highest quality with transparency. For the purpose of obtaining excellent gloss, the specific ink receiving layer is preferably provided on the recording surface side (upper layer). However, when the particle size of silica or alumina silicate fine particles used in the method of the present invention is small and the ink discharge amount is considerably large, a high coating amount (20 g / m ²
Above) is inevitable. If the coating amount is large, the coating film may crack, but as a countermeasure to that, for example, a silica or alumina silicate coating layer is provided on the upper layer, that is, the peak of the pore radius distribution curve of the coating layer surface is substantially 40 nm. Control to the following and provide another ink receiving layer on the lower layer.
By dividing into layers, an ink jet recording material having good ink absorption rate, color developability, high print density, high gloss, weather resistance and water resistance, which is the object of the present invention, can be obtained. When the ink receiving layer has a two-layer structure, the specific silica or alumina silicate fine particle-containing layer may be provided as a lower layer. A layer containing a porous pigment and an adhesive may be provided as the lower layer. Even in such an embodiment, the lower layer contains the pigment and the adhesive. In order to maintain the gloss and the shiny feeling after printing, the coating amount of the layer containing silica and / or alumina silicate fine particles as a main component is adjusted to the range of 50 to 100% by weight with respect to the entire ink receiving layer. Is preferred. When it is 50% or more, it has an extremely high gloss equivalent to that of a photograph,
A feeling of shinyness is obtained.

Next, the other ink receiving layer will be specifically described. As pigments used in other ink receiving layers (in order to obtain the ink absorption amount, the average particle size is preferably 0.5 μm or more), synthetic amorphous silica (also referred to as synthetic amorphous silica), clay, alumina, Various pigments publicly known and used in the general coated paper field such as smectite are appropriately used.
Synthetic amorphous silica is preferably used from the viewpoints of color developability and print density. As an adhesive (binder),
Examples of water-soluble resins such as PVA, casein, and starch described above, and latexes, water-dispersible resins such as synthetic resin emulsions, and the like are conventionally known. The amount of the adhesive added is adjusted to 5 to 150 parts by weight, preferably 10 to 50 parts by weight, based on 100 parts by weight of the pigment. In addition, examples of the cation resin used for the purpose of improving the ink fixability include the amine resins described above. The amount of the cationic resin added is 1 with respect to 100 parts by weight of the pigment.
-30 parts by weight, more preferably 5-20 parts by weight. In addition, various auxiliaries such as a dispersant, a thickener, a defoaming agent, a colorant, an antistatic agent and an antiseptic agent used in the production of general coated paper are appropriately added.

The coating amount of the other ink receiving layer is not particularly limited, but is usually adjusted to ³ to 30 g / m ² .
If the amount is too small, it is meaningless to provide the ink receiving layer. On the other hand, if the amount is too large, the effect is saturated and it is meaningless.

As a coating coater for obtaining any ink receiving layer, various known coaters such as a blade coater, an air knife coater, a roll coater, a bar coater, a gravure coater, a rod blade coater, a lip coater, a curtain coater and a die coater are known. A coating device may be used.

The ink receiving layer can be formed on the support by a coating device. In addition, an ink receiving layer is formed on the molding surface, an intermediate layer having adhesiveness or adhesiveness is provided on the support (or the ink receiving layer), and the intermediate layer and the ink receiving layer (or the support) are adhered to each other. The ink receiving layer can be provided by peeling only the ink receiving layer. When the ink receiving layer is formed using the molding surface as described above, more excellent glossiness can be obtained. Next, a detailed description will be given of a mode in which the ink receiving layer is coated on the molding surface to form a film, the support is provided with an intermediate layer, the ink receiving layer and the intermediate layer are bonded so as to face each other, and the molding surface is peeled off. As a bonding method, a laminating method (dry laminating method, wet laminating method,
Known publicly known laminating methods such as a hot melt laminating method and an extrusion laminating method are effective). Wet laminate, dry laminate,
In the hot melt laminating method, the support is coated with an adhesive resin or a pressure-sensitive adhesive to provide an intermediate layer, and the intermediate layer and the ink receiving layer are bonded so that they face each other and pressure-bonded, and then the molding surface is peeled off, The inkjet recording material of is obtained. In the extruder laminating method, 280-3 in the melt extruder.
After polyethylene melted by heating at 20 ° C. (similar method is used when other resin is used) is flown on the surface of the support, laminated with a molding having an ink receiving layer, cooled and pressure-bonded by a cooling roll. Then, the molded body is peeled off to obtain a desired inkjet recording body.

When a pressure-sensitive adhesive is used as the intermediate layer, a publicly known coating method such as a bar coater, a roll coater or a lip coater is used, and after coating and drying the support, it is attached to the ink receiving layer. After combining, the molding surface can be peeled off to obtain a desired inkjet recording sheet.

The coating amount of the intermediate layer is not particularly limited as long as the ink receiving layer and the support can be adhered, but it is 2 to 2 regardless of whether a thermoplastic resin, an adhesive or a pressure sensitive adhesive is used.
About 50 g / m ² is preferable. When the coating amount is small, it is difficult to obtain a sufficient adhesive force, and when the coating amount is large, the effect is saturated, which is meaningless.

The polymer resin used for the intermediate layer is a thermoplastic resin (for example: ethyl cellulose, vinyl acetate resin and its derivatives, polyethylene, ethylene vinyl acetate copolymer, polyvinyl alcohol, acrylic resin, polystyrene and its copolymer). , Various publicly known thermoplastic resins such as polyisobutylene, hydrocarbon resin, polypropylene, polyamide resin, polyester resin, etc., adhesives (thermosetting resins such as urea resin, phenol resin, epoxy resin, polyisocyanate resin) , Polyvinyl acetal / phenolic resin, rubber / phenolic resin, epoxy / nylon resin and other composite polymer type adhesives, latex type rubber base and other rubber base adhesives, starch, glue, hydrophilic natural polymer adhesives such as casein Various publicly known adhesives such as Pressure sensitive adhesive (including various publicly known pressure sensitive adhesives such as solvent type pressure sensitive adhesive, emulsion type pressure sensitive adhesive, hot melt type pressure sensitive adhesive and delayed type pressure sensitive adhesive). Are used as appropriate.

Materials used for the molding surface include cellophane having high surface smoothness, films such as polyethylene, polypropylene, soft polyvinyl chloride, hard polyvinyl chloride, polyester, polyethylene laminated paper, glassine paper, and impregnated paper. Paper such as vapor-deposited paper, flexible foil such as metal foil and synthetic paper, and plates having a high smooth surface such as inorganic glass, metal, and plastic are appropriately used. In particular, from the viewpoints of coating suitability and suitability for peeling of the ink receiving layer from the molding surface, a polymer film (polyethylene, polypropylene, polyester, etc.), polyethylene laminated paper, glassine paper, inorganic glass, or metal surface is preferable.

It is preferable that the molding surface is smooth in terms of glossiness. The surface roughness (JISB0601) of the molding surface is Ra
Is preferably 0.5 μm or less, and more preferably Ra is 0.05 μm or less. The molding surface may be left untreated, but in order to improve the releasability between the molding surface and the ink receiving layer, the coating surface of the molding surface may be coated with a releasable resin such as silicone or fluororesin. It can be used. From the viewpoint of coatability (repellency, etc.), it is also effective to make the molding surface hydrophilic by corona discharge or plasma treatment.

The coating process of the ink receiving layer when transferring to the support through the intermediate layer is the reverse of the general coating process.
That is, the uppermost layer of the ink receiving layer is first coated on the molding surface,
Another ink receiving layer is sequentially coated on it. The ink receiving layer of the inkjet recording material obtained by transferring to the support has a lamination order similar to that of the coated sheet in order from the recording surface side to the uppermost layer and the other ink receiving layers.

The ink used in the ink jet recording method using the recording material obtained by the method of the present invention includes:
A dye for forming an image and a liquid medium for dissolving or dispersing the dye are essential components, and if necessary, various dispersants, surfactants, viscosity modifiers, resistivity adjusters, pH adjusters, anti-reflective agents. It is adjusted by adding a fungicide, a recording agent dissolution or dispersion stabilizer, or the like.

The recording agents used in the ink include direct dyes, acid dyes, basic dyes, reactive dyes, food dyes, disperse dyes, oil dyes and various pigments, but conventionally known ones are particularly limited. Can be used without. The content of such a dye is determined depending on the type of liquid medium component, the properties required for the ink, etc., but in the case of the ink of the present invention, the formulation as in the conventional ink, that is, There is no particular problem when used in a proportion of about 0.1 to 20% by weight.

As the solvent of the ink used for ink jet recording of the recording material obtained by the method of the present invention, water and various water-soluble organic solvents such as methyl alcohol,
C1-C4 alkyl alcohols such as ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, isobutyl alcohol, ketones or ketone alcohols such as acetone and diacetone alcohol, polyethylene glycol, polypropylene glycol, etc. Polyalkylene glycols, ethylene glycol, propylene glycol, butylene glycol, triethylene glycol, thiodiglycol,
Alkylene glycols having 2 to 6 alkylene groups such as hexylene glycol and diethylene glycol, amides such as dimethylformamide, ethers such as tetrahydrofuran, glycerin, ethylene glycol methyl ether, diethylene glycol methyl (ethyl) ether, triethylene glycol monomethyl Examples include lower alkyl ethers of polyhydric alcohols such as ether.

[0043]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.
Further, unless otherwise specified, parts and% in the examples are solid contents excluding water and represent parts by weight and% by weight, respectively. The inkjet recording materials obtained in the present invention were all processed by a super calendar (linear pressure: 20 Kg / cm) and then used for evaluation.

[Silica fine particles A] Synthetic amorphous silica having an average secondary particle diameter of 2 μm (manufactured by Nippon Silica Industry Co., Ltd., trade name: Nipsil HD, average primary particle diameter: 13 n
m) is dispersed by a sand grinder, then further dispersed by an ultrasonic homogenizer, and the dispersion operation of the sand grinder and the ultrasonic homogenizer is repeated until the average particle size of the secondary particles becomes 40 nm, and an 8% aqueous solution is produced as a trial. did. [Silica fine particles B] The average particle diameter of the secondary particles is 2.2 μm.
Synthetic amorphous silica (manufactured by Nippon Silica Industry Co., Ltd., trade name: N
ipsil K-300, average primary particle size: 15 nm)
Was dispersed by a sand grinder, then further dispersed by an ultrasonic homogenizer, and the dispersion operation of the sand grinder and the ultrasonic homogenizer was repeated until the average particle size of the secondary particles became 90 nm, to prepare a 12% aqueous solution.

[Silica fine particles C] Synthetic amorphous silica (manufactured by Nippon Silica Industry Co., Ltd.) having an average particle size of secondary particles of 1.5 μm
(Trade name: Nipsil E-1011, average primary particle diameter: 24 nm), and after dispersing with a sand grinder, further disperse with an ultrasonic homogenizer until the average particle diameter of the secondary particles reaches 120 nm. Repeat the dispersion operation of the sonic homogenizer to
% Aqueous solution was manufactured. [Silica fine particles D] Synthetic amorphous silica having an average secondary particle diameter of 2 μm (manufactured by Nippon Silica Industry Co., Ltd., trade name: Nips)
il HD, average primary particle diameter: 13 nm) and then dispersed by a sand grinder, and then further dispersed by an ultrasonic homogenizer, and a dispersion operation of a sand grinder and an ultrasonic homogenizer until the average particle diameter of secondary particles reaches 250 nm. By repeating the above procedure, a 15% aqueous solution was produced as a trial.

[Alumina silicate fine particles] 100 g of isopropyl alcohol was placed in a glass reaction container (separable flask, stirring blade, thermometer) having a capacity of 2 liters.
Was charged, and the liquid temperature was heated to 60 ° C. with an oil bath heater. 100r stirring blade (3cm diameter, 3 blades)
While rotating at pm and stirring, 5 g of aluminum isopropoxide (manufactured by Wako Pure Chemical Industries, Ltd.) was added, and then 1.0 g of acetic acid (manufactured by Wako Pure Chemical Industries, Ltd.) was added as an acid catalyst to keep the temperature. While refluxing for 24 hours. Separately, 100 g of ion-exchanged water was charged into the same glass reaction vessel as above, heated to 60 ° C., and added with 1.8 g of ethyl orthosilicate (manufactured by Wako Pure Chemical Industries), and then nitric acid as an acid catalyst. 1 g (manufactured by Wako Pure Chemical Industries, Ltd.) was added and refluxed for 24 hours while maintaining the temperature. Then, the above-mentioned ethyl orthosilicate-nitric acid-ion exchange aqueous solution was added to the aluminum isopropoxide-acetic acid-isopropyl alcohol solution,
The stirring was continued at 60 ° C. for 6 hours to produce alumina silicate fine particles. Then, the mixture was heated to 60 ° C. and concentrated by an evaporator to obtain an alumina silicate aggregate. The composition ratio of the obtained particles of alumina: silica was 3: 2, and the average particle size of the primary particles was 10 nm. Next, water is added to the agglomerate, and after dispersing with a sand grinder, further dispersed with an ultrasonic homogenizer, repeating the dispersing operation of the sand grinder and the ultrasonic homogenizer until the average particle size of the secondary particles becomes 60 nm, An 8% aqueous solution was made as a prototype.

Example 1 PVA (manufactured by Kuraray Co., Ltd., trade name: PVA-135H, degree of polymerization: 3500, degree of saponification: 100 parts of silica fine particles A)
Commercially available coated paper (manufactured by Shin Oji Co., Ltd., trade name: OK coat, 127.9 g /) so that a coating amount of 8% aqueous solution mixed with 40 parts of 99% or more) is 20 g / m ² with a Mayer bar.
m ² ) coated with polyethylene (15 µm polyethylene laminated on the surface of the coated paper by the extrusion lamination method, hereinafter referred to as laminated coated paper) and dried to produce the inkjet recording material of the present invention. did. The peak of the pore radius distribution curve of the obtained ink receiving layer is 8 nm (the pore measuring apparatus used in this experiment has a measurable minimum pore radius of 3 nm, and therefore the pore peaks below 3 nm have Measurement is not possible. It is estimated that Example 1 has pores with a size of 3 nm or less between the primary particles. The following Examples 2, 4, and 5 are considered to be the same). The pore volume of the ink receiving layer is about 0.86 ml / g,
The pore volume in the pore radius range of 3 to 20 nm is about 0.6 ml /
(See FIG. 1. The left axis shows the cumulative volume of pores in the ink receiving layer as 0.8619 ml / g. From the cumulative volume of pores corresponding to a pore radius of 20 nm, The difference in pore volume integrated value corresponding to a radius of 3 nm is about 0.
It can be read as 6 ml / g).

Example 2 A 12% aqueous solution prepared by mixing 40 parts of PVA (manufactured by Kuraray Co., Ltd., trade name: PVA-135H) with 100 parts of silica fine particles B was coated with a Meyer bar so that the coating amount was 20 g / m ^2. The surface of a laminated coated paper similar to the above was coated and dried to produce the inkjet recording material of the present invention. The peak of the pore radius distribution curve of the obtained ink receiving layer is 18 nm.
The pore volume of the ink receiving layer was 0.95 ml / g, and the pore volume in the pore radius range of 3 to 20 nm was 0.35 ml / g. Example 3 A 12% aqueous solution prepared by mixing 100 parts of silica fine particles C with 40 parts of PVA (trade name: PVA-135H, manufactured by Kuraray Co., Ltd.) was laminated coated paper with a Mayer bar so that the coating amount was 20 g / m ^2. The ink-jet recording material of the present invention was manufactured by coating and drying the surface. The peak of the pore radius distribution curve of the obtained ink receiving layer is at two points of 4 nm and 35 nm. The pore volume of the ink receiving layer was about 1.1 ml / g, and the pore volume in the pore radius range of 3 to 20 nm was about 0.6 ml / g.

Example 4 PVA was added to 100 parts of the above-mentioned alumina silicate fine particles.
(Kuraray Co., Ltd., trade name: PVA-135H) An 8% aqueous solution mixed with 40 parts was coated with a Mayer bar at a coating amount of 20 g / m 2.
Apply ² to the surface of the laminated coated paper to dry it,
The inkjet recording material of the present invention was manufactured. The peak of the pore radius distribution curve of the obtained ink receiving layer is 10 nm. The pore volume of the ink receiving layer was 0.65 ml / g, and the pore volume in the pore radius range of 3 to 20 nm was 0.4 ml / g.

Example 5 100 parts of silica fine particles A and 40 parts of PVA (trade name: PVA-135H manufactured by Kuraray Co., Ltd.) were mixed to form an 8% aqueous solution with a Mayer bar so that the coating amount would be 20 g / m ^2. PET film used as a surface (Toray, 75μ
m, trade name: Lumirror T, surface roughness Ra = 0.02μ
m) was coated and dried. Next, an acrylic ester adhesive (manufactured by Nippon Carbide Industry Co., Ltd., trade name: A-02) was coated and dried on the surface of the laminated coated paper described above so that the coating amount was 10 g / m ² . Subsequently, the adhesive was attached so that it faced the ink receiving layer, and pressure-bonded with a calendar having a linear pressure of 20 kg / cm. Subsequently, the PET film was peeled off to manufacture the inkjet recording material of the present invention. The peak of the pore radius distribution curve of the obtained ink receiving layer is 8 nm.

Example 6 PVA (product of Kuraray Co., Ltd., product
Name: PVA-135H) 8% aqueous solution mixed with 40 parts
The coating amount is 10 g / m with the Mayer bar.² Molded to be
PET film used as a surface (Toray, 75μ
m, trade name: Lumirror T, surface roughness Ra = 0.02μ
m) was coated and dried. Furthermore, 100 parts of silica fine particles B
PVA (Kuraray Co., Ltd., trade name: PVA-135H)
12% aqueous solution mixed with 40 parts was coated with a Mayer bar.
Is 20 g / m ² Coating on the coating layer so that
It was Next, the acrylic acid coating on the surface of the laminated coated paper described above.
Stell adhesive (manufactured by Nippon Carbide Industry Co., Ltd., trade name: A-
02) with a coating amount of 10 g / m² To dry
It was Then, apply the adhesive so that it faces the ink receiving layer.
Together, crimp with a calendar with a line pressure of 20 kg / cm
It was Subsequently, the PET film was peeled off and the ink jet of the present invention was peeled off.
A dot recording body was manufactured. The obtained ink receiving layer (upper layer)
The peak of the pore radius distribution curve of is 8 nm.

Example 7 PVA (product of Kuraray Co., Ltd., product
Name: PVA-135H) 8% aqueous solution mixed with 40 parts
The coating amount is 20g / m with the Mayer bar.² Molded to be
PET film used as a surface (Toray, 75μ
m, trade name: Lumirror T, surface roughness Ra = 0.02μ
m) was coated and dried. Average particle size of secondary particles 4.5 μm
Synthetic amorphous silica (manufactured by Tokuyama Corp., trade name: F
Fine seal X-45, primary particle size: about 15 nm) 1
PVA (made by Kuraray Co., Ltd., trade name: PVA-11)
7, degree of polymerization: 1800, degree of saponification: 98.5%) 40 parts
The 15% aqueous solution mixed with is applied with a Mayer bar to a coating amount of 10
g / m ² Was coated on the coating layer and dried. Next
Acrylic ester on the surface of the laminated coated paper
Adhesive (Nippon Carbide Industry Co., Ltd., trade name: A-02)
Coating amount is 10 g / m² It was coated and dried. Continued
The adhesive so that the adhesive faces the ink receiving layer.
Then, they were pressure-bonded with a calendar having a linear pressure of 20 kg / cm. Continued
The PET film was peeled off and the inkjet recording of the present invention was performed.
Produced recording. Pore of the obtained ink receiving layer (upper layer)
The peak of the radius distribution curve is 8 nm.

Comparative Example 1 A 12% aqueous solution prepared by mixing 100 parts of silica fine particles D with 40 parts of PVA (Kuraray Co., Ltd., trade name: PVA-135H) was laminated with a Mayer bar so that the coating amount was 20 g / m ^2. The surface of coated paper was coated and dried to produce the inkjet recording material of the present invention. The peak of the pore radius distribution curve of the obtained ink receiving layer is 45 nm.

Comparative Example 2 Synthetic amorphous silica having an average secondary particle diameter of 4.5 μm (trade name: Fineseal X-, manufactured by Tokuyama Corp.)
45, average primary particle diameter: about 15 nm) 100 parts, PV
A (manufactured by Kuraray Co., Ltd., trade name: PVA-117, degree of polymerization: 1
800, saponification degree: 98.5%) 40 parts were mixed 15
% Aqueous solution, coating amount is 20 g / m ² with a Mayer bar
And coated on a laminated coated paper and dried to produce an inkjet recording material. The peaks of the pore radius distribution curve of the obtained ink receiving layer are 5 nm, 0.32 μm, 1.
It is 4 μm. The pore volume of the ink receiving layer is about 0.75 m
The pore volume in the range of 1 / g and the pore radius of 4 to 20 nm is about 0.
It was 09 ml / g.

Comparative Example 3 Primary Particle Dispersion Average Particle Diameter 10 nm × 100 nm
Pseudo-boehmite sol (manufactured by Nissan Chemical Co., Ltd., trade name: AS
-520) PVA (manufactured by Kuraray Co., Ltd., trade name:
A 5% aqueous solution prepared by mixing 10 parts of PVA-135H) was applied onto a laminated coated paper with a Meyer bar so that the coating amount was 20 g / m ^2, and dried to produce an inkjet recording material. The peak of the pore radius distribution curve of the obtained ink receiving layer is 7 nm. Comparative Example 4 PVA (Kuraray Co., Ltd., trade name: PVA-135H) was added to 100 parts of anionic colloidal silica (Nissan Chemical Co., Ltd., trade name: Snowtex ZL) having an average particle size of 80 nm, which is a dispersion of primary particles. An ink jet recording material was manufactured by applying a 15% aqueous solution prepared by mixing 10 parts by a Mayer bar on the surface of the laminated coated paper so that the coating amount was 20 g / m ² . The peak of the pore radius distribution curve of the obtained ink receiving layer is 13 nm.

Comparative Example 5 Commercially available inkjet glossy paper GP-101 (manufactured by Canon Inc.) having a gloss developing layer and an ink fixing layer was used. The peak of the pore radius distribution curve of the obtained ink receiving layer is 5 μm.

[Evaluation Method] Examples 1 to 7, Comparative Examples 1 to 5
The coating film water resistance, ink absorbency, ink absorbency, etc. of the ink jet recording material obtained in 1. were evaluated by the following methods. Regarding gloss and ink absorbency, a commercially available inkjet printer (trade name: BJC-610, manufactured by Canon Inc.) is used.
J, 720 dpi × 720 dpi) shows the glossiness of the solid portion, ink absorbency, and print density. [Water resistance] A water drop was dropped on an inkjet recording sheet, and after 30 minutes, the water drop was wiped off, and a portion immersed in the water drop was rubbed by hand to evaluate water resistance in four steps. (⊚: No change was observed in the ink receiving layer. ◯: The ink receiving layer was slightly removed. Δ: The ink receiving layer was partially removed.
X: The ink receiving layer was completely removed. )

[Ink Absorption] a. (Ink absorption speed) Black, yellow, magenta, and cyan single colors are solidly printed, and every 5 seconds immediately after printing, high quality paper is stuck to the printed surface and it is observed whether the ink is transferred to the high quality paper. . Measure the time until no transfer occurs at all. The measured number of seconds was evaluated in four stages (⊚: 5 seconds or less, ◯: 5
10 seconds, Δ: 10 to 30 seconds, ×: 30 seconds or more). If the time until the ink dries is 10 seconds or less, the ink absorbency is excellent. b. (Ink Absorption Capacity) A 10 cm × 10 cm square inkjet recording material of the present invention is attached to the center of an A4 size PPC paper, and black ink is solidly printed on the sheet of the present invention so that the ink discharge amount is 30 g / m ^2. Then, observe whether the ink overflows from the coating layer. Immediately after printing, 1 minute, 2 minutes, 5
After a minute, a fine paper is attached to the printed surface, and it is observed whether the ink is transferred to the fine paper. The time until no transfer was performed at all was measured, and 4-stage evaluation was performed as follows. ◎: Less than 1 minute. ○: 1 minute or more and less than 2 minutes. Δ: 2 minutes or more and less than 5 minutes. X: 5 minutes or more.

[Printing Density] The printing density of a solid black portion was measured using a Macbeth reflection densitometer (Macbeth, RD-920). The numbers shown in the table are average values of 5 measurements. [Glossiness of Printed Area (Glossiness)] The glossy feeling of the printed area was visually evaluated from a lateral angle with respect to the printed area, and evaluated in four stages as follows. ⊚: It has the same level of shining as a silver salt type color photograph. ◯: It is inferior to the color photograph, but has a high feeling of light. Δ: Same as printed products of general coated paper. X: Same as general PPC paper.

[0060]

[Table 1]

[0061]

As is clear from Table 1, the ink jet recording material obtained by the method of the present invention has good ink absorbency and ink absorption capacity, and has high glossiness after receiving ink.
It is an inkjet recording material having a high printing density and suitable for obtaining a high-definition image. The ink jet recording material produced by the method of the present invention has high gloss and has excellent ink color development, ink jet recording (printing) suitability, high printing density and weather resistance.

[Brief description of drawings]

FIG. 1 shows a pore distribution curve of an ink receiving layer of an inkjet recording material of Example 1 of the present invention. 10 ⁺⁴ Å corresponds to 10 ³ nm. The left axis of the figure corresponds to the integrated value of the pore volume, and the right axis corresponds to the log differential value.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shunichiro Mukoyoshi             Made by Oji 1-10-6 Shinonome, Koto-ku, Tokyo             Paper Co., Ltd. Shinonome Research Center F-term (reference) 2C056 EA13 FC06                 2H086 BA12 BA16 BA33 BA35 BA41                       BA46

Claims (4)

[Claims] 1. When forming an ink receiving layer having a layer structure of one or more layers on a support, at least one layer of the ink receiving layer is formed of an aggregate of particles of synthetic amorphous silica and / or synthetic alumina silicate. Synthetic amorphous silica and / or synthetic alumina composed of secondary particles having an average particle size of 10 to 150 nm, which are formed by aggregating primary particles having a particle size of 3 to 40 nm by mechanical fragmentation treatment in an aqueous medium. The coating solution containing silicate fine particles and an aqueous resin is used to form the pore structure of at least one layer, and the peak of the pore radius distribution curve obtained by mercury porosimetry is substantially 40 nm.
A method for manufacturing an inkjet recording body, comprising controlling as follows. 2. The pore structure of at least one layer constituting the ink receiving layer has a total volume of all pores of 0.6 ml.
2. The method for producing an inkjet recording body according to claim 1, wherein the total volume of pores having a pore radius of 3 to 20 nm is controlled to 0.3 ml / g or more. 3. The ink receiving layer is formed by forming an ink receiving lower layer containing a pigment and an adhesive on the support, and containing the silica fine particles and / or alumina silicate fine particles and the aqueous resin thereon. 3. The method for producing an inkjet recording material according to claim 1, wherein the upper layer structure is formed by forming the ink receiving upper layer. 4. The ink receiving layer is coated on the molding surface to form a film, and an intermediate layer having tackiness or adhesiveness is separately formed on the support, and the intermediate layer is interposed on the support. 2. The ink receiving layer on the molding surface is transferred and joined together.
4. The method for manufacturing an inkjet recording body according to any one of items 1 to 3.