JP2002103801A - Ink jet recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink jet recording medium having a touch similar to that of an offset or gravure printing sheet in the medium itself, relatively higher glossiness of a printed part than that of an unprinted part, a texture looking similar to that of an offset or gravure printed product of an obtained image and excellent color reproducibility by ink jet recording. SOLUTION: The ink jet recording medium comprises an intermediate layer and a dye fixing layer provided on a support. The intermediate layer contains a PVA or the like and a filler. The dye fixing layer contains a water soluble or hydrophilic resin. The surface of the support has a lightness index L of CIELAB of 83 or more and a perception indexes (a) of a range of -5 to +5 and (b) of a range of -7 to +7. The surface of the dye fixing layer has the index L of 85 or more and (a) of a range of -4 to +4 and the (b) of a range of -5 to +5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recording information such as images and characters by ink-jet printing, particularly when recording images and characters with ink, which is excellent in glossiness and good in appearance. The present invention relates to an ink jet recording medium suitable for recording a high-quality image or the like with good coloration of a portion.

[0002]

2. Description of the Related Art In recent years, various types of printers for computer output have become widespread. Above all, an ink jet printer is excellent in quietness, cost, and image quality, can reproduce a full-color image with high quality, has excellent performance not found in other systems, and can be expected to spread further. Especially in recent years,
With the control of ink droplets, the development of light and shade inks, and the improvement of the performance of the dye image receiving layer, the technology has advanced until an image equivalent to a silver halide photograph can be obtained. In the above-mentioned ink jet recording system, it is common to use an aqueous ink as the ink and use a recording paper having a dye receiving layer formed on a support as a recording paper.

[0003] Here, a general technical example of a recording medium is as follows. By providing a receiving layer in which porous silica is dispersed in polyvinyl alcohol and adding a cation component as a recording medium, a physical effect is obtained. A method of chemically fixing a dye by absorbing ink into silica pores and adding a cationic component, or a method of chemically fixing a dye with alumina while physically absorbing the ink using an alumina sol. Or a method of using a cationic resin to chemically fix a dye by a cation portion while physically absorbing the ink by swelling.

However, many of such general recording media have been developed for the purpose of improving image quality, glossiness, drying properties, and water resistance, targeting silver halide photography. Therefore, many of these characteristics can be satisfied, but not only printed matter but also the recording medium itself has a texture similar to silver halide photographic paper, and it is different from printing paper used for offset printing and gravure printing. The texture is different. Further, with respect to the printed matter, a uniform glossiness such as a photograph can be obtained, but it is different from a texture such as a normal offset printed matter or a gravure printed matter.

Further, in Japanese Patent Application Laid-Open No. Hei 9-156210, from the viewpoint that the swollen resin lowers the gloss of the printed portion, more than 40% of the filler (pigment) to be blended is B.
The porous silica having an ET surface area of 200 to 600 m ² / g, and further defining the compounding ratio of casein and urethane resin,
There is disclosed an ink jet recording medium in which the gloss of a printed portion is not reduced by applying a cast coat when applying and drying this material. However, the printed matter of the recording medium obtained by this method using an ink-jet method has a low rise rate of the Gs (60 °) glossiness of the printed portion.
The difference in Gs (60 °) gloss between the printed portion and the unprinted portion is small, and has a texture different from that of a printed matter.

Further, in Japanese Patent Application Laid-Open No. 11-288405, the outermost layer of the coating layer has an average primary particle diameter of 3 to 4
Description of an ink jet recording medium comprising silica fine particles having a secondary particle average particle diameter of 10 to 300 nm at 0 nm, providing an outermost layer, and heating and pressing with a heat calender having a mirror roll to finish. However, this also has a small difference in glossiness between the printed portion and the unprinted portion, and the obtained image also has a texture different from that of the printed matter.

[0007]

That is, in the prior art, although it is suitable for obtaining the texture and printed matter of a recording medium similar to a silver halide photograph, it is not suitable for expressing printed matter of offset printing or gravure printing. In terms of appearance, the texture of the recording medium itself is different from that of the printing paper, and the difference in gloss between the printed portion and the unprinted portion is small.Also, the color reproducibility by inkjet recording should never be satisfied. Was.

The present invention has been made in view of the above-mentioned problems of the prior art, that is, the recording medium itself has a texture similar to that of offset printing or gravure printing paper and has a printing quality. The glossiness of the part is higher than the glossiness of the unprinted part, the resulting image has a texture similar to the printed matter of offset printing or gravure printing, and the color reproducibility by inkjet recording is excellent. A recording medium is provided.

[0009]

Means for Solving the Problems The present invention has been made to achieve the above object, and the invention according to claim 1 has at least an intermediate layer and a dye fixing layer on a support in this order. The intermediate layer contains at least a polyvinyl alcohol and a filler; the dye fixing layer contains at least either a water-soluble or hydrophilic resin; Surface is CIELAB
In the lightness index L and the perception indices a and b, L is 8
3 or more, a is -5 to +5, and b is -7 to +7.

According to this, when the dye fixing layer is made of a material other than the polyvinyl alcohol used for the intermediate layer, and a water-soluble or hydrophilic resin (acrylic resin) is used as a main material, the printing portion of the printing portion is not formed. The glossiness is higher than the glossiness of the unprinted portion, and has a texture similar to that of a printed matter, which is preferable. Further, by providing the intermediate layer,
It is preferable because the solvent and additives of the ink are well absorbed in the intermediate layer rather than in the dye fixing layer, and the drying property of the image recorded by inkjet is improved. Regarding the lightness index and the perception index of the support, if L is 8
If a is less than 3, a is less than -5 or greater than +5, or b is less than -7 or +7
If it is larger, the texture of the printing paper is different in any case, which is not preferable.

The invention of claim 2 is that the dye fixing layer comprises:
2. The ink jet recording medium according to claim 1, wherein either a water-soluble or hydrophilic acrylic resin is used.

According to this, when the dye fixing layer is made of a material other than the polyvinyl alcohol used for the intermediate layer, and a water-soluble or hydrophilic acrylic resin is used as a main material, particularly, the gloss of the printed portion is particularly high. The degree is preferably higher than that of the glossiness of the unprinted area and has a texture similar to that of the printed matter.

According to a third aspect of the present invention, at least an intermediate layer and a dye fixing layer are provided in this order on a support, and at least either a water-soluble or hydrophilic acrylic resin is used for the dye fixing layer. And the surface of the dye fixing layer has a lightness index L and a perception index a and b in CIELAB, L is 85 or more, a is -4 to +4, and b
Is an ink-jet recording medium characterized by having a value of -5 to +5.

According to this, the dye fixing layer is preferable because it has a texture similar to that of the printed matter as described above. Also,
The intermediate layer is formed of a material different from that of the dye fixing layer as a whole, and uses at least a filler and a water-soluble or hydrophilic resin. This is preferable because the solvent and additives of the ink are well absorbed in the intermediate layer rather than in the dye fixing layer, and the drying property of the image recorded by the ink jet is improved. Regarding the lightness index and the perception index on the surface of the dye fixing layer, if L is 8
If a is less than 5, a is less than -4 or greater than +4, or b is less than -5 or +5
If it is larger, the texture of the printing paper will be different in any case, which is not preferable.

According to a fourth aspect of the present invention, there is provided the ink jet recording medium according to the third aspect, wherein at least the polyvinyl alcohol and a filler are used in the intermediate layer.

According to this, the intermediate layer is formed by using at least a polyvinyl alcohol and a filler.
It is preferable because the drying property is further improved.

[0017] In any one of claims 1 to 4,
In addition to the resins, a filler may be appropriately contained in the dye fixing layer. According to this, it is preferable in that the drying property of the printing portion is improved.

The invention according to claim 5 is the ink jet recording medium according to any one of claims 1 to 4, wherein the dye fixing layer does not contain a filler.

According to this, it is preferable not to include a filler in the dye fixing layer, because the gloss of the printed portion is further increased.

According to a sixth aspect of the present invention, at least the intermediate layer, the dye fixing layer, and the protective layer are provided in this order on the support, and the protective layer has a thickness of the intermediate layer or the dye. Compared to the thinner one of the fixing layers, it is equivalent or thinner, and the protective layer uses at least a filler and a water-soluble or hydrophilic resin, and furthermore, the protective layer contains The inkjet recording medium according to any one of claims 1 to 4, wherein the content of the filler in the protective layer is higher than the content of any of the fillers.

According to the sixth aspect, the dye fixing layer is preferable because it has a texture similar to that of a printed matter as described above. Further, the intermediate layer is preferable because the drying property is improved as described above. As the protective layer, a filler and a resin are used. However, by increasing the content of the filler and making the thickness extremely thin, a highly transparent film is obtained. Since the print density of the portion is very small and the surface strength is high, it is desirable because the trace of spurs of the paper feeding portion of the ink jet printer hardly adheres to the recording medium and the surface is less sticky.

In addition, the protective layer receives ink flying at the time of recording by ink-jet recording, and at the same time, has a property that the ink is quickly passed through a dye fixing layer or an intermediate layer disposed on the lower layer side. In order to impart the property of retaining the dye on the fixing layer side and to maintain the gloss of the printing portion, the thickness of the intermediate layer or the dye fixing layer is equal to or thinner than the thinner one. Yes, and regarding the material composition, at least a filler and a water-soluble or hydrophilic resin are used, and the content of the filler is higher than the content of the filler in the dye fixing layer. .

According to a seventh aspect of the present invention, the protective layer is made of colloidal silica as a filler and polyvinyl alcohols as a hydrophilic resin. It is a recording medium for inkjet described in the above.

According to this, a highly transparent film is obtained particularly by using colloidal silica and polyvinyl alcohol as the material of the protective layer, so that a high effect is obtained in that the print density of the print portion is not reduced. Also, in particular, by using colloidal silica, since the surface strength is increased, the spur marks of the paper feeding portion of the ink jet printer are hardly attached to the recording medium, and the stickiness of the surface is further reduced because it is further reduced. preferable.

[0025] The invention of claim 8 is that the water-soluble or hydrophilic resin of the dye-fixing layer is a copolymer unit comprising a cationic monomer represented by the chemical formula 1 or a betaine monomer or both. The inkjet recording medium according to any one of claims 1 to 8, wherein the recording medium is an acrylic resin.

[0026]

Embedded image

Wherein R _{1 to} R ₄ are H or C _n H _{2n + 1} , Q is O or NH, and R ₅ is C _n H
_2n represents an anion, and X ^- represents an anion. In the chemical formulas, n is 1 for R ₁ , 1 or 2 for R _{2 to} R ₄ , and an integer of 1 to ₅ for R ₅ . )

According to this, the fixation of the anionic dye is improved by the action of the cation portion of the acrylic resin, and bleeding and bleeding do not occur even after long-term storage, which is preferable. Even when an acrylic resin having a betaine portion is used, the effect is not so high as that of the cation portion, but the fixability of the dye is improved.
According to this, the drying property is improved by including the filler in the acrylic resin. Further, by making the ratio of the filler of the protective layer higher than the ratio of the dye fixing layer,
It is preferable because the dye stays on the surface of the ink receiving layer and maintains the gloss of the printed portion.

[0029] The invention according to claim 9 is that, in the dye fixing layer,
The inkjet recording medium according to any one of claims 1 to 9, wherein the recording medium contains at least both a polyvinyl alcohol and the hydrophilic acrylic resin.

According to this, the addition of polyvinyl alcohol is preferable because the water absorption is improved and the stickiness of the surface is reduced.

[0031]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The ink jet recording medium of the present invention will be described below in detail. Generally, in offset printing or gravure printing, image information is recorded by applying ink on a dedicated printing paper based on the image information, and drying and curing the ink. At that time, a part of the printing ink penetrates into the paper, but most of the printing ink usually stays on the surface of the paper, and the ink film remaining on this surface develops gloss.

On the other hand, in ink-jet printing, the ink of the ink-jet basically penetrates into the inside of a coating layer called a receptor layer to develop color and dry. Therefore, the gloss of the printing portion is not positively increased. Therefore, an image formed by the inkjet method has a different texture from an image printed by offset printing or gravure printing.

In order for an ink-jet printed material to have a texture similar to a printed material, the glossiness of the printed portion needs to be higher than the glossiness of the unprinted portion. Further, by setting the texture of the recording medium itself to a texture similar to the printing paper of offset printing or gravure printing, the texture is more similar to a printed matter.

The ink receiving layer according to the present invention is provided with an intermediate layer and a dye fixing layer from the side closer to the support, wherein the intermediate layer contains at least polyvinyl alcohol and a filler, and the dye fixing layer At least a water-soluble or hydrophilic acrylic resin is used. By using a water-soluble or hydrophilic acrylic resin for the dye fixing layer, when printing is performed by inkjet, the glossiness of the printed portion becomes higher than the glossiness of the unprinted portion.

Although the details of the mechanism have not yet been elucidated, when the ink is ejected from the nozzle and adheres to the dye fixing layer, the resin in the portion receiving the ink swells, At present, it is presumed that this is due to slight dissolution and further improvement in surface smoothness. Also, when an acrylic resin is used for the dye fixing layer, the physical absorption rate is simply lower than that of the ink image receiving layer formed of alumina sol or silica, but the dye stays on the surface, so that the glossiness of the printing part is high. It is estimated that it will rise at present.

However, if it is used as an ink receiving layer composed of a single layer of an acrylic resin alone, the physical absorption rate is low, the drying property is low, and the printing section is tacky, and the printing section is gently touched after printing. The ink sticks to the finger just by touching. In addition, ink solvents and additives that cannot be absorbed by the acrylic resin are absorbed by the support,
Cockling occurs. Therefore, by providing an intermediate layer using at least a polyvinyl alcohol and a filler on the support side from the dye fixing layer, the solvent and additives of the ink are absorbed by the intermediate layer, and the drying property is improved. It is also effective in preventing ink solvent from penetrating into the support and preventing cockling.

Further, there are many types of printing paper for offset printing and gravure printing. However, as a result of our sincere consideration, the surface of the support was found to have an L of 83
As described above, when a is in the range of -5 to +5 and b is in the range of -7 to +7, an inkjet recording medium having a hue similar to many printing papers can be obtained. Further, even when the support is not in the above range, if the surface of the dye fixing layer has L of 85 or more, a of -4 to +4, and b of -5 to +5,
An ink jet recording medium having a hue similar to many printing papers can be obtained.

Further, a protective layer is provided if necessary. By providing at least a protective layer using colloidal silica and polyvinyl alcohol, a highly transparent film is obtained. Therefore, the printing density of the printing section is not reduced. Although the strength of the ink receiving layer is limited due to the use of resin, the surface strength is improved by using a protective layer, and traces of spurs at the paper feed section of the inkjet printer are recorded on the recording medium. It becomes difficult to stick. Also, the stickiness of the surface is reduced.

Even when a protective layer is used, an ink jet recording medium having a hue similar to many printing papers can be obtained as long as the hue of the support is in the above range. Even when the support is not in the above range, the surface of the protective layer has an L of 8
When a is 5 or more, a is within a range of -4 to +4, and b is within a range of -5 to +5, an inkjet recording medium having a hue similar to many printing papers can be obtained.

As the support described in the present invention, a support of any available material can be used. For example,
For various kinds of paper such as synthetic paper, high quality paper, art paper, coated paper, cast coated paper or paperboard, and resins such as polyethylene terephthalate, polyethylene naphthalate, polyvinyl chloride, polycarbonate, cellophane, or polyethylene Resin, the above-mentioned papers and films were combined by lamination, etc.
Glass, wood, etc. are used as appropriate. In particular, the use of printing paper such as coated paper is preferable because the texture of the recording medium is more similar to the texture of the printing paper. The surface of the support may be subjected to a corona discharge treatment or a known easy adhesion treatment such as an anchor layer made of a polyurethane resin or the like for the purpose of improving the adhesion of the ink image receiving layer. The smoothness of the support is not questionable, and the hardness is not specified.

The polyvinyl alcohols described in the present invention are polyvinyl alcohol and modified polyvinyl alcohol, and their saponification degree, polymerization degree, PH and the like are not particularly limited. Specific examples of the modification of the polyvinyl alcohol include silanol modification, carboxyl modification,
Cationic modification and the like. In particular, the intermediate layer has a silanol modification or a repeating ethylene unit in the structure for reasons of water resistance and film strength, and the dye-fixing layer or the protective layer has the ink absorption rate or tack prevention. Therefore, it is preferable to use those having a saponification degree of 90% or more and a polymerization degree of 1000 or more.

The filler described in the present invention is a commonly used filler, and is not particularly limited. Examples are porous silica made by gel method or precipitation method, fumed silica made by dry method, kaolin, clay, calcium carbonate, titanium oxide, zinc oxide, magnesium oxide, magnesium hydroxide, aluminum hydroxide, etc. Is raised. Among them, the use of porous silica having an average particle size of 1 to 20 μm is preferable because physical absorption is obtained and drying property is improved. Further, these porous silicas are inexpensive and are desirable in terms of cost.

The water-soluble or hydrophilic acrylic resin described in the present invention is a polymer composed of acrylic monomers such as acrylic ester, methacrylic ester acrylic acid derivative, methacrylic acid derivative, and
It refers to a polymer that is water-soluble or hydrophilic.

Typical examples of the acrylate or methacrylate include acrylic acid, methyl methacrylate, ethyl methacrylate, tetrahydrofurfuryl methacrylate, 2-hydroxyethyl methacrylate, N, N-dimethylaminoethyl acrylate,
Examples thereof include acrylamide, methacrylamide, and diacetone acrylamide, but are not limited thereto. Above all, a resin obtained by copolymerizing an acrylic monomer having an amide group and a hydrophobic acrylic monomer in combination is favorable because it has both hydrophilicity and water resistance. It is also an effective method to synthesize a resin using an acrylic monomer having a crosslinkable component as a functional group, and use the resin in combination with a crosslinking agent. In particular,
It is preferable to use a crosslinked resin obtained by adding adipic dihydrazide to an acrylic resin having diacetone acrylamide for the dye fixing layer, since the dye fixing ability and the absorption rate are not reduced and the water resistance is improved.

The colloidal silica described in the present invention is 1
It refers to silica particles in which secondary particles are dispersed in a colloidal form without agglomeration, and the shape may be spherical, chain, or pearl necklace. In addition, ammonia, calcium,
Those modified with ions or compounds such as alumina can also be used.

The cationic monomer described in the present invention is:
It is a monomer having a structure represented by [Chemical Formula 1]. The method of introducing the tertiary nitrogen atom-containing acrylic monomer is a method of copolymerizing an acrylic monomer having a tertiary nitrogen atom as one component to obtain an acrylic resin, and then quaternizing with an alkyl halide, Lewis acid, or the like. Is preliminarily quaternized with an alkyl halide, Lewis acid or the like and then copolymerized. The structure of the betaine monomer is not particularly limited.

The mixing ratio between the polyvinyl alcohol and the filler in the intermediate layer is not particularly limited. However, from the viewpoint of ink absorption, the ratio of the polyvinyl alcohol / filler is usually about 1/10 to 30/10, preferably 2 / 10-5 /
It is about 10. When the proportion of the polyvinyl alcohol increases, the ink absorbency deteriorates, and as a result, the drying property of the ink image receiving layer deteriorates. When the proportion of the filler increases, the strength of the coating film decreases, and as a result, the surface strength of the ink receiving layer decreases.

The mixing ratio of colloidal silica and polyvinyl alcohol in the protective layer is not particularly limited, but usually, colloidal silica / polyvinyl alcohol is 10%.
/ 10 to 70/10, preferably 20/10 to 60
It is about / 10. If the proportion of the colloidal silica is increased, the strength of the coating film is reduced, and marks of holes due to spurs are easily formed. Further, the transparency is reduced, the printing density is reduced, and the gloss of the printed portion is lost. Also, if the amount of polyvinyl alcohol increases, the surface becomes sticky, and the trace of transfer of the ink due to spurs tends to be formed.

The thickness of the intermediate layer is usually 10 to 40 g / m
^{It is} about ² and preferably about 15 to 30 g / m ² . If the thickness is too thin, the ink absorbency is reduced, and bleeding occurs on the surface of the ink receiving layer, the drying property is slow, and cockling occurs, which is not preferable. On the other hand, if the thickness is too large, the cost increases, curling occurs, and the texture of the printing paper becomes different, which is not preferable.

The thickness of the ink fixing layer is usually 3 to 30 g.
/ M ² , preferably about 8 to ²⁰ g / m ² . If the thickness is too thin, the glossiness of the printing area will decrease,
The glossiness of the surface of the ink receiving layer also decreases, which is not preferable.
On the other hand, if the thickness is too large, the cost is increased, the drying property is reduced, and tack is generated, which is not preferable. The thickness of the protective layer is usually about 0.1 to 10 μm, preferably about 0.2 to 5 μm. If the thickness is too thin, the drying property is reduced, the surface strength is weakened, and spur marks of the ink jet printer are generated, which is not preferable. Also, if the thickness is too thick, the glossiness of the printing portion is reduced,
It is not preferable because haze is generated in the printing portion.

Further, in order to obtain an ink jet recording medium particularly similar to the texture of a specific printing paper, a pigment is mixed with the intermediate layer to adjust the color. The pigment to be used is not particularly limited, but the kind and amount of the pigment which does not deviate from the original purpose of the intermediate layer are selected. For example, titanium yellow is used as the yellow pigment, Ben pattern is used as the magenta pigment, and cobalt blue is used as the cyan pigment.

In the present invention, if necessary, a crosslinking agent, a dye fixing agent, a tendency brightener, a surfactant, an antifoaming agent, a pH adjuster, a preservative, an ultraviolet absorber, a dispersant may be added to the receptor layer. And the like may be arbitrarily selected from conventionally known additives and contained therein as long as the object of the present invention is not prevented. In preparing the inkjet recording medium of the present invention, a resin and a filler and additives are dispersed using a disperser or the like, mixed,
Alternatively, a conventionally known method of dissolving may be used.

In coating, the material is coated on the surface of the support by a known method, for example, a roll coater method, a flade coater method, an air knife coater method, a gate roll coater method, a size press coater method, or the like. Thereafter, drying is performed using a hot-air drying furnace, a hot drum, or the like, to obtain the inkjet recording medium of the present invention.

<Operation> As described above, according to the ink jet recording medium of the present invention, when printing is performed by the ink jet method, the printed matter has glossiness similar to that of offset printed or gravure printed matter. In addition, since the printing paper has a texture similar to that of the printing paper, the texture is similar to that of the printed matter of offset printing or gravure printing.

[0055]

The present invention will be described below more specifically with reference to examples and comparative examples. In the description, "parts" are based on weight and solids unless otherwise specified. <Support> The paper used for the support is the printing paper shown in Table 1.

[0056]

[Table 1]

<Synthesis of Acrylic Resin> A total of 20 g of a monomer was introduced into a flask equipped with a stirrer, a nitrogen inlet tube and a reflux condenser so as to have a composition ratio shown in [Table 2], and 10 g of ethanol and 30 grams of water was added to dissolve and stirred under an atmosphere of nitrogen on an oil bath. 0.1
The polymerization is started by adding 6 g of α, α'-azobisisobutyronitrile, and the polymerization reaction is continued by heating and stirring for about 8 hours on a 60 ° C. oil bath to obtain a colorless and viscous polymer solution. I got

[0058]

[Table 2]

<Intermediate Layer> The ink used in the intermediate layer was prepared with the following composition. Intermediate layer A Silica: X-37B (manufactured by Tokuyama Corporation) 10 parts Polyvinyl alcohol: PVA-217 (manufactured by Kuraray Co., Ltd.) 4 parts Water 86 parts Intermediate layer B The one with a 05% ben pattern. Intermediate layer C A layer obtained by adding 0.05% of titanium yellow to the silica part by weight of the intermediate layer A.

<Protective Layer> The ink used in the protective layer was prepared with the following composition. Colloidal silica: Snowtec PS-MO (manufactured by Nissan Chemical Industry Co., Ltd.) 4 parts (however, solid content conversion) Polyvinyl alcohol: PVA-217 (manufactured by Kuraray Co., Ltd.) 1 part Water 30 parts

<Examples and Comparative Examples> Intermediate layer on support
Is 20.0 g / m^TwoTo be a wire
It was applied using a bar and dried at 100 ° C. for 5 minutes. So
After that, a dye fixing layer is obtained by performing synthesis according to the method described above.
Acrylic resin was applied at a dry application amount of 15 g / m ^TwoTona
Using a wire bar and apply at 100 ° C for 5 minutes
It was dried to obtain an ink jet recording medium. In addition,
When a protective layer is provided,
Using a via coater so that the film thickness becomes 0.4 to 0.6 μm
Was applied. The support in each of the examples,
The combinations of the interlayer, the dye fixing layer and the protective layer are shown in [Table 3].
You.

[0062]

[Table 3]

The obtained ink-jet recording medium was applied to a Canon ink-jet printer (product name: B
J-F8500) to form an evaluation image. With respect to the ink jet recording medium obtained as described above, L, a, and b of the unprinted portion on the surface of the ink image receiving layer are represented by:
It was measured using a color difference meter Spectrolino manufactured by Gretag Macbeth. In addition, the glossiness of the printed portion and the visual evaluation of the recording medium were also evaluated. The results are shown in [Table 4].

[Glossiness of Printed Area] The printed area was visually observed and its glossiness was observed. ；: The glossiness increases in the unprinted area and the printed area, and resembles printed matter. Δ: The glossiness is not changed between the unprinted area and the printed area, but there is glossiness. ×: Glossiness is not changed between the unprinted portion and the printed portion, and there is no glossiness.

[0065]

[Table 4]

[0066]

As described above, in the ink jet recording medium according to the present invention, the glossiness of the printed portion is higher than the glossiness of the non-printed portion, and an image similar to a printed matter of offset printing or gravure printing is obtained. As a result, since the texture is similar to the texture of many general printing papers, an ink jet recording medium having a texture similar to the printed matter of offset printing or gravure printing can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of an ink jet recording medium of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Ink-jet recording medium 2 ... Ink image receiving layer 3 ... Support 4 ... Intermediate layer 5 ... Ink dyeing layer 6 ... Protective layer

Claims (9)

[Claims] At least an intermediate layer and a dye fixing layer are provided on a support in this order, at least a polyvinyl alcohol and a filler are used in the intermediate layer, and at least Either a water-soluble or hydrophilic resin is used, and the surface of the support has a lightness index L and a perception index a and b in CIELAB, where L is 83 or more, and a is-
5 to +5, and b is from -7 to +7. 2. The ink jet recording medium according to claim 1, wherein said dye fixing layer is made of either a water-soluble or hydrophilic acrylic resin. 3. At least an intermediate layer and a dye fixing layer are provided in this order on a support, and at least either a water-soluble or hydrophilic acrylic resin is used for the dye fixing layer, and When the surface of the dye fixing layer has a lightness index L and a perception index a and b in CIELAB, L is 85 or more, a
Is -4 to +4, and b is -5 to +5. 4. The ink jet recording medium according to claim 3, wherein the intermediate layer contains at least a polyvinyl alcohol and a filler. 5. The ink jet recording medium according to claim 1, wherein said dye fixing layer contains no filler. 6. On the support, at least the intermediate layer,
The dye fixing layer and the protective layer are provided in this order, and the protective layer has a thickness equal to or smaller than that of the intermediate layer or the dye fixing layer, whichever is thinner. In the layer, at least a filler and a water-soluble or hydrophilic resin are used, and the content of the filler in the protective layer is higher than the content of the filler in the dye fixing layer. The inkjet recording medium according to any one of claims 1 to 4, wherein: 7. The ink jet recording medium according to claim 6, wherein said protective layer is made of colloidal silica as a filler and polyvinyl alcohols as a hydrophilic resin. 8. An acrylic resin in which the water-soluble or hydrophilic resin of the dye fixing layer has a cationic unit represented by the chemical formula 1 or a betaine monomer or both in a copolymer unit. The inkjet recording medium according to any one of claims 1 to 7, wherein: Embedded image [Wherein R _{1 to} R ₄ are H or C _n H _{2n + 1} , Q is O or NH, and R ₅ is C _n H
_2n represents an anion, and X ^- represents an anion. In the chemical formulas, n is 1 for R ₁ , 1 or 2 for R _{2 to} R ₄ , and an integer of 1 to ₅ for R ₅ . ) 9. The ink jet recording medium according to claim 1, wherein the dye fixing layer contains at least both polyvinyl alcohols and the hydrophilic acrylic resin. .