JP2004155077A - Recording medium for ink jet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording medium for an ink jet which has a fine sight, is free from occurrence of oozing or cockling, especially wide in a color area reproduction range in a recording section, excellent in color stability and suitable as print proof reading service at recording information such as an image, a letter and the like by an ink jet printer. <P>SOLUTION: In the recording medium for the ink jet wherein an ink receptive layer is provided on at least one side of a base material, at least an intermediate layer and a dye fixing layer are provided on the ink receptive layer and at least a cathionic dry silica, an alumina anhydride synthesized by baking and a binder are used in the dye fixing layer. <P>COPYRIGHT: (C)2004,JPO

Description

【００８７】
【発明の効果】
以上のように、本発明によると、インクジェットプリンターによって画像や文字などの情報を記録する場合に、美観が良好で滲みやコックリングの発生もなく、オフセット印刷やグラビア印刷のもつ色域再現範囲を十分に満たすことができ、かつ印画後の色安定性に優れ、印刷校正用途としても十分使用可能なインクジェット用記録媒体を得ることができた。
【図面の簡単な説明】
【図１】本発明のインクジェット用記録媒体の一実施例を示す縦断面図。
【符号の説明】
１・・・インクジェット用記録媒体
２・・・インク受容層
３・・・染料定着層
４・・・中間層
５・・・支持体[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention, when recording information such as images and characters by an ink jet printer, good appearance, no bleeding or cockling, especially the wide color gamut reproduction range of the recording part, and color stability after printing The present invention relates to an ink jet recording medium which is excellent in printability and suitable for use in print proofreading.
[0002]
[Prior 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, simplicity, and image quality, can reproduce a full-color image with high quality, has excellent performance not found in other methods, and is expected to be further popularized. In particular, in recent years, with the control of ink droplets, the development of dark and light inks, and the improvement of the performance of recording media, the technology has progressed until images equivalent to silver halide photographs can be obtained.
[0003]
With the development of such technology, an ink jet printer is increasingly used for print proofing of offset printing and gravure printing. The printing proofreading by the ink-jet printer not only enables proofreading on demand, but also realizes a remote proof system, thereby enabling quick proofreading.
[0004]
In the above-described ink jet recording system, it is common to use an aqueous ink in which a dye is dissolved as the ink, and use a recording medium having an ink receiving layer formed on a support as a recording medium.
[0005]
Here, a general technical example of a recording medium is as follows. By using a recording medium in which porous silica is dispersed in polyvinyl alcohol and a cation component is added and provided as an ink receiving layer, the ink is silica finely formed by a physical action. A method of chemically fixing a dye by absorbing it into pores and adding a cationic component, or a method of chemically fixing a dye with alumina while physically absorbing ink using an alumina sol, or There is a method in which a cationic resin is used to chemically fix a dye by a cationic portion while physically absorbing the ink by swelling.
[0006]
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 photographs. Therefore, many of these characteristics can be satisfied, but the color gamut cannot satisfy the color gamut of offset printing or gravure printing, which is not practical for print proofing. In addition, since the dye gradually fixes after printing, the color changes over time, especially within a few hours after printing, are large, which is unsuitable for print proofreading applications where color stability is important.
[0007]
According to the prior art, many ink jet recording media having fine pores formed by inorganic fine particles having good characteristics in ink absorption, ink drying, and image quality have been proposed (for example, see Patent References 1 to 4).
[0008]
However, in these examples, the color gamut does not satisfy the color gamut in offset printing or gravure printing because the dye penetrates into the pores and develops a color, which is insufficient for print proofing applications. Met. Further, since the dye is gradually fixed in the pores, the color stability cannot be said to be good, and the value of the hue change (ΔE) one day after 30 minutes after printing is a high value, and This point was not sufficient for calibration use.
[0009]
[Patent Document 1]
JP-A-11-348409
[Patent Document 2]
Japanese Patent Application Laid-Open No. 2000-94830
[Patent Document 3]
JP 2000-309157 A
[Patent Document 4]
JP 2001-96911 A
In the case of an ink jet recording medium that absorbs ink by swelling, a transparent resin can be used to obtain a color close to the original hue of the dye, and the color gamut reproduction range is widened. The ink absorption speed is slow in order to absorb ink, and high image quality cannot be obtained with a recent high-speed ink jet printer.
[0014]
For this reason, there is a strong demand for an ink jet recording medium which can be sufficiently used especially for a printing configuration. That is, it is an ink jet recording medium that not only has excellent ink absorbency but also satisfies the color reproduction range of printing and has high color stability after printing.
[0015]
[Problems to be solved by the invention]
In other words, the conventional technique is suitable for obtaining a texture or printed matter similar to a silver halide photograph, but the color gamut reproduction range is insufficient for the color gamut reproduction range of offset printing or gravure printing. . Further, the color stability was not satisfactory for use in proofreading.
[0016]
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, so that most of the dyes and pigments, which are coloring components, also remain on the surface. In addition, the original hue of the dye or pigment is sufficiently exhibited.
[0017]
On the other hand, in printing by ink jet, ink jet ink basically penetrates into a coating layer called an ink receiving layer, so that a dye is also fixed in the ink receiving layer and develops a color. Therefore, in addition to the transparency of the film of the ink receiving layer, the refractive index, and the like, the color development is also affected by components other than the dye in the ink, that is, the residual solvent and the residual additive, and the hue inherent in the dye is not sufficiently expressed. Often.
[0018]
For this reason, when an ink jet printer is used for color proofing of offset printing or gravure printing, the color reproduction range of offset printing or gravure printing can be improved even with a conventional ink jet recording medium, even if the image quality and the bleeding of characters are excellent. It was narrower than that of and was not practical enough.
[0019]
In addition, it took time for the ink-jet ink to penetrate into the inside of the receiving layer, during which time the dye was not completely fixed, and the color change in the early stage of printing was large. Therefore, when used for calibration, calibration cannot be performed for several hours until the color is stabilized to some extent after printing, which is not practical. For use in printing proofreading, it is required that the dye is fixed immediately after printing and the color change in the early stage of printing is stabilized as soon as possible, and that the color changes over time afterwards are small.
[0020]
The present invention has been made in view of such problems of the conventional technology, that is, when recording information such as images and characters by an ink jet printer, good appearance, blur and cockling. The present invention relates to an ink jet recording medium which has no occurrence, in particular, has a wide color gamut reproduction range of a recording portion, has excellent color stability, and is suitable for use in print proofreading.
[0021]
[Means for Solving the Problems]
The present invention has been made to achieve the above object, and in an ink jet recording medium provided with an ink receiving layer on at least one surface of a support, the ink receiving layer has at least an intermediate layer and a dye fixing layer. Are provided in this order from the support, and the dye fixing layer comprises at least cationic dry silica, anhydrous alumina synthesized by calcining, and a binder.
[0022]
By using anhydrous alumina synthesized by firing, the dye fixing speed is increased and the color stability is improved. Anhydrous alumina is an θ-alumina ink jet recording medium, which makes it possible to obtain an ink jet recording medium having an excellent balance between ink absorption and dye fixability, and having excellent color stability after printing. .
[0023]
Further, according to an ink jet recording medium having a specific surface area of 20 to 150 m ² / g, the above characteristics are more effectively achieved, which is preferable.
[0024]
Furthermore, by using a cationic dry silica having an average primary particle diameter of 20 nm or less, a dye fixing layer having excellent transparency is formed, and a wide color reproduction range and high gloss ink jet recording are provided. You can get the medium.
[0025]
Further, if the proportion of alumina having strong cationicity is too large, the color reproduction range is narrowed. Therefore, the mixing ratio of alumina and silica is set to a weight ratio of silica to alumina 10 of from 20 to 120, so that the color reproduction range and An ink jet recording medium having an excellent balance of dye fixability can be obtained.
[0026]
Further, when the dye fixing layer contains an alkylamine or alkyldiamine type quaternary ammonium salt polymer in an amount of 2 to 10% by weight, an ink jet recording medium having a high dye fixing speed can be achieved.
[0027]
Further, in an ink jet recording medium in which an ink receiving layer is provided on at least one surface of the support, the ink receiving layer has at least an intermediate layer and a dye fixing layer provided in this order from the support. Contains at least cationic fumed silica and an alkylamine or alkyldiamine type quaternary ammonium salt polymer and a binder, wherein the alkylamine or alkyldiamine type quaternary ammonium salt polymer is used for fixing the dye. Even with an ink jet recording medium characterized by being contained in the layer in an amount of 2 to 10% by weight, the dyeing and fixing speed is increased, and the color stability is improved.
[0028]
In particular, it is more preferable that the support is non-coated paper because the color reproduction range is widened.
[0029]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the inkjet recording medium of the present invention will be described in detail.
[0030]
The inkjet recording medium according to the present invention is an inkjet recording medium having a wide color gamut reproduction range that is sufficiently practical for use in print proofing of offset printing and gravure printing.
[0031]
The ink receiving layer in the present invention is a layer capable of sufficiently absorbing the ink ejected from the ink jet printer, and is composed of at least an intermediate layer and a dye fixing layer. The dye fixing layer is a layer that can mainly fix the dye in the ink, and the intermediate layer is a layer that can mainly absorb the solvent, additives and the like in the ink. The support is a base material on which an ink receiving layer can be formed on at least one surface.
[0032]
According to this, it is possible to obtain an ink jet recording medium having excellent color developability by imparting sufficient ink absorbency to the intermediate layer and fixing more dye to the portion in the ink receiving layer near the surface in the dye fixing layer. I can do it.
[0033]
The anhydrous alumina synthesized by calcination in the present invention is an anhydrous alumina usually obtained by heat-treating alumina hydrate. By using anhydrous alumina synthesized by firing, the dye fixing speed is increased and the color stability is improved.
[0034]
Various crystal systems such as meta-stable species θ-alumina, δ-alumina, γ-alumina, η-alumina and the like generated during the heat treatment process are known from α-alumina completely dehydrated by heat treatment. I have.
[0035]
Usually, when fired at a high temperature, small pores inside the particles are lost, and alumina particles having a small specific surface area are obtained. For example, α-alumina has a specific surface area of several m ² / g, but in this case, the fixability of the dye is reduced or the ink absorbency is insufficient. For this reason, a larger amount of alumina is required. However, increasing the amount of alumina tends to make the film surface brittle and easily cause powder dropping.
[0036]
Conversely, when alumina particles having a large specific surface area are used, the weather resistance of ultraviolet rays, ozone, and the like deteriorates. Therefore, it is necessary to select an appropriate specific surface area of the particles in consideration of the balance between the ink absorbency, the dye fixing property, and the weather resistance.
[0037]
Here, by mainly using θ-alumina, it is possible to obtain an ink jet recording medium having an excellent balance between ink absorbency and dye fixability.
[0038]
In addition, by using alumina containing mainly θ-alumina and appropriately mixed with other crystalline alumina, it is possible to obtain an ink jet recording medium suitable for the ink discharge amount and speed of the printer to be used. In that case, it is more preferable that the specific surface area of the alumina is 20 to 150 m ² / g. The proportion of the .theta.-alumina to be mixed is not particularly limited, but is preferably at least 50% of the total alumina in consideration of the balance between dyeability and ink absorbability.
[0039]
Dry silica is also referred to as fumed silica, and is generally silica produced by burning silicon tetrachloride with hydrogen and oxygen, and is characterized by its extremely fine particles. Here, from the viewpoint of the transparency of the dye fixing layer and the gloss of the surface of the ink receiving layer, those having an average primary particle diameter of 20 nm or less are more preferably used. According to this, an ink jet image receiving layer having a wide color reproduction range is achieved.
[0040]
The cationic dry silica in the present invention is obtained by cationizing the surface of dry silica with a cationic compound. Normally, untreated fumed silica has an anionic surface and cannot fix anionic dye. Therefore, in order to fix the dye, it is necessary to separately add a cationic additive or to make the surface of the silica cationic.
[0041]
When adding a cationic additive separately, there are many problems such as the difficulty of preparation and stability after preparation. Compared to the method of directly treating the silanol group of silica with a cationic compound to make it cationic It is easy.
[0042]
Organic compounds and inorganic compounds are not limited as the cationic compound. For example, a method of cationizing the surface of dry silica by performing a surface treatment with an organic compound or polymer having a quaternary ammonium salt, or performing a surface treatment of the dry silica with an organic compound or polymer having an amine, and then forming an alkyl halide or A method of cationizing as an amine salt by treating with a Lewis acid or the like, or a method of cationizing by performing a surface treatment of dry silica with an inorganic compound of alumina, titanium, and magnesium or an oxide thereof, to an organic compound or polymer having an amino group. Surface treatment of fumed silica, dispersing in water, and electrolyzing amino groups to cationize the surface.
[0043]
In the method of cationizing the surface by electrolysis, the pH of the colloidal dispersion of dry silica needs to be sufficiently lower than the pH of the isoelectric point. Here, a method of treating an amine by hydrolysis or the like to make it cationic under acidity is simpler and more excellent in stability, and thus is considered suitable for the present invention.
[0044]
However, when the amine is treated, the amine cannot have cationicity depending on the pH, and the dye fixability at the moment when the ink jet ink is injected may be weak. Therefore, by adding cationic alumina at the same time to form a mixed material of alumina and silica, a dye fixing layer excellent in ink fixing property is achieved.
[0045]
However, on the other hand, there is a drawback that the color reproduction range of the recording medium is narrowed by increasing the proportion of alumina. Is preferred.
[0046]
A desirable use range in consideration of the balance between the dye fixing property and the color reproduction range is preferably such that cationic silica is used in a ratio of 20 g to 120 g with respect to 10 g of alumina.
[0047]
Further, any binder is used in the present invention. Generally, polyvinyl alcohols, urethane resins, acrylic resins, ester resins are used by dissolving them in a solvent, or self-emulsifying or emulsifying with an emulsifier. Used.
[0048]
At that time, it is important to select a binder that does not cause aggregation of the cationic dry silica. Above all, when polyvinyl alcohols are used, not only can an ink jet recording medium having a high image quality and a wide color gamut reproduction range be manufactured at low cost, but also the dye fixing with excellent dispersion stability of cationic dry silica and excellent coating stability. A layer coating solution can be obtained.
[0049]
In order to further enhance the stability, the pH of the coating solution for the dye fixing layer is preferably adjusted to 6.0 or less, and more preferably 5.0 or less.
[0050]
In addition, the degree of polymerization of the alkylamine or alkyldiamine type quaternary ammonium salt polymer in the present invention is not particularly limited, but a relatively low molecular weight polymer is used in consideration of the stability of the coating solution after the preparation. Can be This results in higher color stability. If the addition ratio is too small, the effect is low, and if it is too large, the stability of the coating liquid is deteriorated, and the color gamut reproduction range may be narrowed, which is not preferable.
[0051]
The non-coated paper in the present invention is paper whose surface is not coated, and high-quality paper and medium-quality paper are used. The sizing degree and whiteness are not particularly limited, but it is preferable to add a sizing agent internally and to use a Skecht sizing degree of about 15 seconds or more because the ink receiving layer application step becomes easier. On the other hand, if the degree of Stigecht sizing is too high, the absorptivity decreases, and bleeding and the color gamut reproducible range decrease.
[0052]
Although the material used for the intermediate layer is not particularly limited, a material mainly containing an inorganic filler having a relatively large water absorption is usually used from the viewpoint of ink absorption. From the viewpoint of availability and cost, wet silica having a particle diameter of about 1 to 10 μm is used. Preferably, the ratio of binder / inorganic filler is about 1/10 to 30/10, more preferably about 2/10 to 5/10. Also, the presence or absence of surface treatment does not matter.
[0053]
The mixing ratio between the fine filler such as cationic dry silica and alumina and the binder in the dye fixing layer is not particularly limited, but usually, the ratio of binder / fine filler is about 10/30 to 10/150, preferably about 10/30. / 40 to about 10/120. When the proportion of the fine filler is increased, the strength of the coating film is reduced, causing problems such as powder dropping, and cracks on the film surface are conspicuous and the appearance is impaired. In addition, when the ratio of the binder is increased, the absorbability is reduced, the occurrence of bleeding is increased, and the color gamut reproduction range is narrowed.
[0054]
The coating amount of the intermediate layer is usually about 10 to 40 g / m ² , preferably about 15 to 30 g / m ² . If the thickness is too small, the ink absorbency decreases, and bleeding occurs on the surface of the ink receiving layer, the drying property is slow, and cockling occurs. On the other hand, if the thickness is too large, the cost increases and curling occurs, which is not preferable.
[0055]
The coating amount of the dye fixing layer is usually about 3 g to 20 g / m ² , preferably about 5 g to 15 g / m ² . If the thickness is too thin, the dye fixing ability is insufficient, and bleeding is observed or the color gamut is narrowed.On the other hand, if the thickness is too thick, the cost increases and curling occurs, which is not preferable. .
[0056]
It is usually preferable to use a support of about 80 to 200 g / m ² for good transportability to an ink jet printer.
[0057]
In the present invention, if necessary, a crosslinking agent, a dye fixing agent, a tendency brightening agent, a surfactant, an antifoaming agent, a pH adjusting agent, a preservative, an ultraviolet absorber, a dispersant, etc. The additive may be arbitrarily selected from conventionally known additives and contained therein as long as the object of the present invention is not prevented.
[0058]
The ink-receiving layer can be provided on one side or both sides of the support. However, if provided on one side, a back surface may be provided on the opposite side of the ink-receiving layer as needed to prevent curling and improve transportability to a printer. Layers can be provided.
[0059]
In preparing the inkjet recording medium of the present invention, a conventionally known method of dispersing, mixing, or dissolving a filler, a binder, and an additive using a disperser or the like may be used.
[0060]
In the case of coating, it is applied to 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.
[0061]
<Action>
As described above, according to the ink jet recording medium of the present invention, when recording information such as images and characters by an ink jet printer, the appearance is good, there is no occurrence of bleeding or cockling, and particularly, the color of the recording portion is It is possible to obtain an ink jet recording medium having a wide range reproduction range and excellent color stability and suitable for use in print proofing.
[0062]
【Example】
Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples. The weight values in the text are based on solid content.
[0063]
<Support>
The following paper was used for the support.
[0064]
Support A
OK Prince Fine (Oji Paper) 127.9 g / m ²
Support B
OK Topcoat N (manufactured by Oji Paper) 127.9 g / m ²
[0065]
<Intermediate layer>
The ink used for the intermediate layer was prepared by dispersing glass beads with the following composition.
[0066]
Middle layer A
Calcium carbonate μ-POWDER 3N (Bihoku Powder Chemical Industry Co., Ltd.) 12g
Silanol-modified polyvinyl alcohol R-1130 (Kuraray) 4 g
84 g of water
Middle layer B
10 g of wet silica X-37B (manufactured by Tokuyama Corporation)
Silanol-modified polyvinyl alcohol R-1130 (Kuraray) 4 g
86 g of water
[0067]
<Dye fixing layer>
The ink used in the dye fixing layer was prepared with the following composition.
[0068]
Dye fixing layer A
70 g of cationic dry silica A (average primary particle diameter 7 nm)
Theta-alumina AKP-G008 (Sumitomo Chemical Co., Ltd.) 20 g
Polyvinyl alcohol PVA-617 (Kuraray) 10 g
410 g of water
[0069]
Dye fixing layer B
70 g of cationic dry silica A (average primary particle diameter 7 nm)
α-Alumina AKP-30 (Sumitomo Chemical Co., Ltd.) 20 g
Polyvinyl alcohol PVA-617 (Kuraray) 10 g
410 g of water
[0070]
Dye fixing layer C
20 g of cationic dry silica A (average primary particle diameter 7 nm)
Theta-alumina AKP-G008 (Sumitomo Chemical Co., Ltd.) 70 g
Polyvinyl alcohol PVA-617 (Kuraray) 10 g
410 g of water
[0071]
Dye fixing layer D
20 g of cationic dry silica B (average primary particle diameter 25 nm)
Theta-alumina AKP-G008 (Sumitomo Chemical Co., Ltd.) 70 g
Polyvinyl alcohol PVA-617 (Kuraray) 10 g
410 g of water
[0072]
Dye fixing layer E
70 g of cationic dry silica A (average primary particle diameter 7 nm)
Theta-alumina AKP-G008 (Sumitomo Chemical Co., Ltd.) 20 g
Polyvinyl alcohol PVA-617 (Kuraray) 10 g
Polyallylamine hydrochloride PAA-HCl-3L (Nitto Boseki) 5g
450 g of water
[0073]
Dye fixing layer F
90 g of cationic dry silica A (average primary particle diameter 7 nm)
Polyvinyl alcohol PVA-617 (Kuraray) 10 g
450 g of water
[0074]
Dye fixing layer G
θ-alumina AKP-G008 (Sumitomo Chemical Co., Ltd.) 90 g
Polyvinyl alcohol PVA-617 (Kuraray) 10 g
450 g of water
[0075]
<Production method of Examples and Comparative Examples>
The intermediate layer was coated on the support using a wire bar so that the dry coating amount was 20.0 g / m ^2, and dried at 100 ° C. for 5 minutes. Thereafter, the dye fixing layer was applied using a wire bar so that the dry coating amount was 10 g / m ^2, and dried at 100 ° C. for 3 minutes to obtain an ink jet recording medium. The used ink is a genuine product ink.
[0076]
An evaluation image was formed on the obtained inkjet recording medium using a Canon inkjet printer (product name: BJ-F870), the color gamut reproduction range was confirmed, and the image quality, bleeding, and cockling were evaluated.
[0077]
To check the gloss, the gloss of the surface of the receiving layer was measured using a 60 ° gloss meter.
[0078]
Spectrolino manufactured by Gretag Macbeth was used to confirm the color gamut reproduction range.
[0079]
The evaluation criteria are as follows.
[0080]
(Glossiness)
The glossiness of the image receiving layer surface in the unprinted area was measured.
A: The glossiness is 10% or more, and it has the same glossiness as coated paper for printing.
B: The glossiness is 5% to 10% and has a glossiness close to that of coated paper for printing.
C: The glossiness is less than 5%, and has the same glossiness as matte coated paper for printing.
[0081]
(Bleeding)
Several types of character patterns were printed and evaluated visually.
：: Sharp characters without blurring and characters with a background are not blurred.
Δ: Some characters are blurred in a blank character or a character with a background, but the character can be recognized.
×: Bleeding was observed in a single character, which was insufficient for practical use.
[0082]
(Cock ring)
A solid pattern having a high density was printed on one surface of the recording medium, and cockling was evaluated.
：: No cockling was observed.
×: The paper was wavy, and cockling was observed.
[0083]
(Color gamut)
A color gamut confirmation chart was printed, the hue was measured, and it was confirmed whether the color gamut reproduction range of offset printing or gravure printing could be covered.
A: The color gamut is sufficiently wide and sufficiently satisfies the color gamut reproduction range of printing.
B: The color gamut of printing can be satisfied.
C: The color gamut is narrow and cannot satisfy the color gamut of printing.
[0084]
(Color stability)
Solid patterns of Y, M, C, R, G, B, and Bk were printed, and the hue was measured 30 minutes and 1 day after printing, and ΔE was calculated 1 day later based on 30 minutes after printing.
A: The average value of ΔE is 3 or less, the color stability is excellent, and the level can be sufficiently used for print proofreading.
B: The average value of ΔE is 5 or less, and the color stability is moderate, but it is limited for print proof use.
C: The average value of ΔE exceeds 5, poor in color stability, and difficult to use for print proofing.
[0085]
The results are shown in (Table 1).
[0086]
[Table 1]

[0087]
【The invention's effect】
As described above, according to the present invention, when recording information such as images and characters by an ink jet printer, the appearance is good, there is no blurring or cockling, and the color gamut reproduction range of offset printing or gravure printing is improved. An ink jet recording medium which can be sufficiently satisfied, has excellent color stability after printing, and can be sufficiently used for print proofreading 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 receiving layer 3 ... Dye fixing layer 4 ... Intermediate layer 5 ... Support

Claims (8)

In an ink jet recording medium in which an ink receiving layer is provided on at least one surface of a support, at least an intermediate layer and a dye fixing layer are provided in this order on the ink receiving layer, and at least the dye fixing layer is provided on the dye fixing layer. An ink jet recording medium comprising cationic dry silica, anhydrous alumina synthesized by firing, and a binder. 2. The ink jet recording medium according to claim 1, wherein the anhydrous alumina contains at least [theta] -alumina. The recording medium for inkjet according to claim 1, wherein the anhydrous alumina has a specific surface area of 20 to 150 m ² / g. 4. The mixing ratio of anhydrous alumina and cationic dry silica synthesized by baking in the dye fixing layer, wherein the weight ratio of silica to alumina 10 is 20 to 120. Inkjet recording medium. The ink jet according to any one of claims 1 to 4, wherein the dye fixing layer contains a quaternary ammonium salt polymer of an alkylamine or alkyldiamine type in an amount of 2 to 10% by weight. Recording media. In an ink jet recording medium in which an ink receiving layer is provided on at least one surface of the support, at least an intermediate layer and a dye fixing layer are provided in this order on the ink receiving layer, and at least the dye fixing layer is provided on the dye fixing layer. It contains cationic fumed silica and an alkylamine or alkyldiamine type quaternary ammonium salt polymer and a binder,
An ink jet recording medium, wherein the alkylamine or alkyldiamine type quaternary ammonium salt polymer is contained in the dye fixing layer in an amount of 2 to 10% by weight. The ink-jet recording medium according to any one of claims 1 to 6, wherein the cationic dry silica has an average primary particle diameter of 20 nm or less. The inkjet recording medium according to any one of claims 1 to 7, wherein the support is non-coated paper.

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