JPH10193589A - Image recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate blur of an image even if ink jet recorded image is held at high temperature and moisture by providing an ink absorption layer containing pseudo boehmite and mordant on a support. SOLUTION: An ink absorption layer containing pseudo-Borhmite and mordant is provided on a support. The boehmit is colloidal aggregate of boehmite crystal. Preferably, it contains binder. As its pore characteristics, mean pore size is preferably 30 to 100Å and pore volume is preferably 0.5 to 1.0cc/g. The boehmite preferably contains a coating amount of 5 to 30g/m<2> . As the composition of the coating liquid, 5 to 50 pts.wt. of binder is contained to 100 pts.wt. of the boefmite solid content, and its entire solid concentration is preferably 5 to 30wt.% for use.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an image recording medium which is excellent in gradation, color reproduction and granularity. Further, the present invention relates to a recording medium excellent in photographic quality in ink jet recording or the like.

[0002]

2. Description of the Related Art In recent years, with the spread of personal computers, printers such as ink-jet printers have rapidly become widespread. Further, with the spread of photographic image scanners, photo CDs, and digital cameras, the demand for a printing system for printing digitized photographic images is rapidly increasing. Particularly, the spread of simple and inexpensive inkjet printers is remarkable, and the demand for the image quality of the image is increasing year by year. As a recording medium used in the ink jet recording method,
Heretofore, a recording sheet in which an ink receiving layer is provided on a support called ordinary paper or ink jet recording paper has been used. However, when these recording sheets are used, they cannot be used in the field of photographic images that require high resolution and gloss, such as bleeding of ink and low gloss.

As one means for solving the blur of an image, JP-A-3-215082 and JP-A-7-31488 have been proposed.
A recording sheet using an ink-absorbing layer containing an alnamisol (so-called pseudoboehmite) described in Japanese Patent Application Laid-open No. 2 (Kokai) No. 2 is known. This recording sheet has high ink absorbency and is excellent. However, even if this recording sheet is used, there is a problem that the printed image blurs when stored at high temperature and high humidity (40 ° C. or higher, 80% RH or higher) after recording.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a recording medium which does not cause blurring of an image recorded by ink jet recording even when stored at high temperature and high humidity.

[0005]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems by using an image recording medium provided with an ink absorbing layer containing pseudo-boehmite and a mordant on a support.

[0006] The pseudo-boehmite of the present invention is a colloidal aggregate of boehmite (composition formula: AlOOH) crystals. It preferably contains a binder. Its pore characteristics include an average pore radius of 30 to 100 ° and a pore volume of 0.5 to 1.0 cc.
/ G is preferable.

[0007] The pseudo-boehmite has a coating amount of 5 to 30 g / m ^2.
Is preferably within the range. If the coating amount is less than 5 g / m ² , the ink absorbency may be reduced, or the gloss may be deteriorated due to the influence of the unevenness of the substrate, which is not preferable. If the coating amount exceeds 30 g / m ² , not only is pseudo-boehmite unnecessarily consumed, but also the strength of pseudo-boehmite may be reduced, which is not preferable.

[0008] The composition of the pseudo-boehmite coating solution preferably contains 5 to 50 parts by weight of a binder with respect to 100 parts by weight of solids of pseudo-boehmite, and has a total solids concentration of 5 to 3 parts.
Those having 0% by weight can be suitably used. As a solvent for the coating liquid, an aqueous solvent is preferable from the viewpoint of handleability. As the binder, an organic binder comprising a polymer compound such as starch or a modified product thereof, polyvinyl alcohol and a modified product thereof, SBR latex, NBR latex, carboxymethylcellulose, hydroxymethylcellulose and polyvinylpyrrolidone can be preferably used.

The mordant can be arbitrarily selected from commonly used mordants, and among them, a polymer mordant is particularly preferred. Here, the polymer mordant includes a polymer containing a tertiary amino group, a polymer having a nitrogen-containing heterocyclic moiety, and a polymer containing these quaternary cationic groups. Preferred specific examples of homopolymers and copolymers containing a vinyl monomer unit having a tertiary amino group include the following. The number of the monomer unit represents mol% (the same applies hereinafter).

[0010]

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Specific examples of homopolymers and copolymers containing a vinyl monomer unit having a tertiary imidazole group are described in US Pat. Nos. 4,282,305 and 4,11.
No. 5,124, No. 3,148,061, JP-A-60
-118834, 60-122941, JP-A-6
The following may be mentioned, including the mordants described in JP-A-2-244403 and JP-A-62-244036.

[0012]

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[0013]

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[0014]

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Preferred specific examples of homopolymers and copolymers containing a vinyl monomer unit having a quaternary imidazolium salt include British Patent Nos. 2,056,101, 2,093,041, and 1,594. U.S. Pat. Nos. 4,124,386 and 4,115,12.
No. 4, No. 4,273,853, No. 4,450, 2
The following may be mentioned, including the mordants described in JP-A No. 24 and JP-A-48-28325.

[0016]

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Other preferred examples of homopolymers and copolymers containing a vinyl monomer unit having a quaternary ammonium salt include US Pat. No. 3,709,690.
No. 3,898,088, No. 3,958,99
No. 5, JP-A-60-57836 and JP-A-60-60643.
No. 60-122940, No. 60-122942
And mordants described in JP-A-60-235134 and the like.

[0018]

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[0019]

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In addition, US Pat. No. 2,548,564
No. 2,484,430 and 3,148,16
No. 3,756,814 and the like, vinylpyridine polymer and vinylpyridinium cationic polymer; US Pat. No. 3,625,694
No. 3,859,096, No. 4,128,53
No. 8, No. 1,277,453, and the like, polymer mordants crosslinkable with gelatin and the like; US Pat. Nos. 3,958,995 and 2,721,85
No. 2,798,063, JP-A-54-115
No. 228, No. 54-145529, No. 54-2602
No. 7,898,088; water-insoluble mordant disclosed in U.S. Pat. No. 3,898,088; U.S. Pat. No. 4,168,976 (Japanese Unexamined Patent Publication No. No. 137333) Reactive mordants capable of forming a covalent bond with the dyes disclosed in the specification and the like; further, U.S. Patent Nos. 3,709,690 and 3,788,855;
No. 3,642,482, No. 3,488,706
No. 3,557,066, No. 3,271,14
7, No. 3,271,148, JP-A-50-713.
No. 32, No. 53-30328, No. 52-155528
And mordants disclosed in JP-A Nos. 53-125 and 53-1024.

In addition, US Pat. No. 2,675,316
And the mordants described in JP-A-2,882,156. The molecular weight of the polymer mordant of the present invention is suitably from 1,000 to 1,000,000, and particularly preferably from 10,000 to 200,000.

As the hydrophilic colloid, a hydrophilic colloid described later, a superabsorbent polymer or both of them can be used, and gelatin is most typical. The mixing ratio between the polymer mordant and the hydrophilic colloid, and the amount of the polymer mordant applied, are easily determined by those skilled in the art according to the amount of the dye to be morded, the type and composition of the polymer mordant, and the image forming process used. The mordant / hydrophilic colloid ratio is 20/80 to 80/20 (weight ratio), and the mordant application amount is suitably 0.2 to 15 g / m ² , preferably 0.5 to 8 g / m ^2. preferably used in m ^2. The above-mentioned polymer mordant can be used as a part of the binder of the pseudo-boehmite coating solution. Further, an aqueous solution of a polymer mordant may be applied on the pseudo-boehmite layer. Further, an aqueous solution containing a polymer mordant and a hydrophilic colloid may be applied on the pseudo-boehmite layer.

The polymer mordant of the present invention can be obtained by performing polymerization using polymerization techniques such as solution polymerization, suspension polymerization, emulsion polymerization, and precipitation polymerization, which are well known. Synthetic polymer ”, Volume 1, 246-290
Page 3, volume 3, pages 1 to 108, and the like.

The recording medium of the present invention has a diameter of 3 μm
It is desirable to contain a matting agent having a size of not less than 30 μm. More preferably, the particle size of the matting agent is from 10 μm to 30 μm. As the matting agent added to the recording medium of the present invention, conventionally known matting agents can be used. Matting agents are well known in the photographic art and can be defined as discrete solid particles of an inorganic or organic material dispersible in a hydrophilic organic colloid binder. Examples of inorganic matting agents include oxides (eg, silicon dioxide, titanium oxide, magnesium oxide, aluminum oxide, etc.) and alkaline earth metal salts (eg, sulfates and carbonates, specifically barium sulfate, carbonate Examples thereof include calcium, magnesium sulfate, calcium carbonate, etc., silver halide grains which do not form an image (silver chloride, silver bromide, etc., and a small amount of iodine atom as a halogen component may be added), glass, and the like.

In addition, West German Patent 2,529,321
Nos., British Patent Nos. 760,775 and 1,260,77
No. 2, U.S. Pat. Nos. 1,201,905 and 2,19
2,241, 3,053,662 and 3,06
2,649, 3,257,206, 3,32
2,555, 3,353,958, 3,37
No. 0,951, 3,411,907, 3,43
7,484, 3,523,022 and 3,61
5,554, 3,635,714, 3,76
9,020, 4,021,245, 4,02
No. 9,504 and the like can also be used.

Examples of the organic matting agent include starch, cellulose ester (eg, cellulose acetate propionate, etc.), cellulose ether (eg, ethyl cellulose, etc.), and synthetic resin. Examples of synthetic resins are water-insoluble or poorly soluble synthetic polymers, such as alkyl (meth) acrylate, alkoxyalkyl (meth) acrylate, glycysilyl (meth) acrylate, (meth) acrylamide, vinyl ester (eg, vinyl acetate), Acrylonitrile, olefins (eg, ethylene, etc.), styrene, benzoguanamine / formaldehyde condensate alone or in combination, or acrylic acid, methacrylic acid, α, β-unsaturated dicarboxylic acid, hydroxyalkyl (meth) acrylate, sulfoalkyl ( A polymer having a combination of meth) acrylate, styrene sulfonic acid and the like as a monomer component can be used.

Other epoxy resin, nylon, polycarbonate, phenol resin, polyvinyl carbazole,
Polyvinylidene chloride can also be used. In addition, British Patent No. 1,055,713 and US Patent No. 1,9
39,213, 2,221,873, 2,26
8,662, 2,322,037, 2,37
No. 6,005, No. 2,391,181, No. 2,70
Nos. 1,245, 2,992,101, 3,07
9,257, 3,262,782, 3,44
3,946, 3,516,832, 3,53
9,344, 3,591,379, 3,75
Nos. 4,924, 3,767,448 and JP-A-49-49.
Organic matting agents described in 106821, 57-14835 and the like can be used.

Among them, polymethyl methacrylate, benzoguanamine / formaldehyde condensation polymer (benzoguanamine resin, specifically represented by the following formula, for example, trade name: Eposter: Nippon Shokubai Chemical Industry Co., Ltd .: existing chemical substances 7-31, etc. ), Polyolefin (for example, flow beads LE-1080, CL-2080, H
E-5023; manufactured by Iron and Steel Chemical Co. or trade name Chemipearl V
-100; manufactured by Mitsui Petrochemical)

[0029]

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Preferred are polystyrene beads (manufactured by Moritex), nylon beads (manufactured by Moritex), AS resin beads (manufactured by Moritex), epoxy resin beads (manufactured by Moritex), polycarbonate resins (manufactured by Moritex), and the like.

[0031] As an alkali-soluble matting agent,
No. 7231, No. 58-66937, No. 60-889
No. 4, an alkali-soluble matting agent such as an alkyl methacrylate / methacrylic acid copolymer described in JP-A-58-166.
No. 341, an alkali-soluble polymer having an anionic group can also be used. These matting agents may be used in combination. (For example, the combination use of two or more kinds of fine particle powders having different Mohs hardness described in JP-A-58-145935, the combination use of two or more kinds of spherical matting agents having different average particle sizes described in JP-A-59-149356, (An irregular matting agent such as silica is used for the dye fixing layer and a spherical matting agent such as polymethyl methacrylate is used for the back layer.)

In the hydrophilic colloid layer of the present invention, a coating aid,
Various surfactants may be included for various purposes such as antistatic, improving slipperiness, emulsifying and dispersing, preventing adhesion, and improving photographic properties (eg, development acceleration, high contrast, sensitization). For example, saponins (steroids), alkylene oxide derivatives (eg, polyethylene glycol, polyethylene glycol / polypropylene glycol condensate, polyethylene glycol alkyl ethers or polyethylene glycol alkyl aryl ethers, polyethylene glycol esters, polyethylene glycol sorbitan esters, polyalkylene glycol) Nonionic surfactants such as alkylamines or amides, polyethylene oxide adducts of silicone, glycidol derivatives (eg, alkenyl succinic acid polyglycerides, alkylphenol polyglycerides), and alkyl esters such as fatty acid esters of polyhydric alcohols. Agent: alkyl carboxylate, alkyl sulfonate, alkyl benzene sulf Phosphonates, alkyl naphthalene sulfonates, alkyl sulfates, alkyl phosphates, N-acyl-N-alkyl taurates, sulfosuccinates, esphoalkyl polyoxyethylene alkyl phenyl ethers, polyoxy Carboxy groups such as ethylene alkyl eicosanoates,
Anionic surfactants containing an acidic group such as a sulfo group, a phospho group, a sulfate group, and a phosphate group; amino acids;
Amphoteric surfactants such as aminoalkylsulfonic acids, aminoalkylsulfuric acid or phosphoric acid esters, alkylbetaines and amine oxides; alkylamine salts, aliphatic or aromatic quaternary ammonium salts, and complex compounds such as pyridinium and imidazolium Cationic surfactants such as cyclic quaternary ammonium salts and aliphatic or heterocyclic containing phosphonium or sulfonium salts can be used.

A slipping agent may be added to the recording medium of the present invention. Examples of the slipping agent include higher alkyl sodium sulfate, higher fatty acid higher alcohol ester, carbowax, higher alkyl phosphate ester, and silicon compounds. In particular, the compounds described in U.S. Pat. Nos. 2,882,157, 3,121,060, 3,850,640 and JP-A-51-141623 may be used alone or in combination of two or more. This is particularly effective. Also, French Patent No. 2,180,465 and British Patent No. 955,06
No. 1, No. 1, 143, 118, No. 1, 270, 578
Nos. 1,320,564 and 1,320,757
And JP-A-49-5017 and JP-A-51-141623.
No. 54-159221, No. 56-81841,
Research Disclosure
No. 13,969, U.S. Pat. Nos. 1,263,722, 2,588,765, 2,739,891, 3,018,178, 3,042,522, and 3,080, Nos. 317, 3,082,087, 3,121,060, 3,222,178, 3,295,979, 3,489,567 and 3,516,832 And 3,658,573, 3,679,411, and 3,870,521. The application amount of the sliding agent is
About 5-200 mg / m ² is suitable.

The constituent layers (including the back layer) of the recording medium of the present invention may contain silica, particularly colloidal silica, for the purpose of improving adhesion resistance, improving film strength, and improving curl balance. . Colloidal silica has an average particle size of 7
The main component is silicon dioxide in the range of mμ to 120 μm, and may contain alumina or sodium aluminate as a minor component. Further, these colloidal silicas may contain inorganic bases such as sodium hydroxide, potassium hydroxide, lithium hydroxide and ammonium hydroxide and organic salts such as tetramethylammonium ion as stabilizers. In particular, as a stabilizer for colloidal silica, colloidal silica comprising potassium hydroxide or ammonium hydroxide is preferable. These colloidal silicas are described, for example, in Egon Matievik.
jevic) Hen, Surface and Colloid Science
(Surface and Colloid Science) Volume 6, 3-100
(1973, John Willy and Sans (J
ohn Wiley & Sons).

Specific examples of the colloidal silica include:
Ludox AM, Ludox AS, Ludox LS, Ludox TM, Ludox HS from DuPont (EIdu pont de Nemours & Co. (USA))
Monsanto Co. (US) from Nissan Chemical Co., Ltd. (Japan, Tokyo) under the trade name of Snowtex 20, Snowtex C, Snowtex N, Snowtex O, etc.
A) from Syton C-30, Syton 200, etc.
Also, Nalcoag 1030, Na
Examples include those commercially available under the trade names such as lcoag 1060 and Nalcoag ID-21-64. The preferred use amount of the colloidal silica is 0.05 to 1.0, particularly preferably 0.2 to 0.7, by dry weight ratio to gelatin used as a binder.

In the present invention, it is preferable to use a germicidal and antibacterial agent for the recording medium in order to prevent decay of the dispersion or coating solution of various chemicals. The antibacterial and antibacterial agent used in the present invention may be any water-soluble one,
Specifically, thiazolyl benzimidazole compounds, isothiazolone compounds, chlorophenol compounds, bromophenol compounds, thiocyanic acid and isothionic acid compounds, acid azide compounds, diazine and triazine compounds, thiourea compounds, Alkyl guanidine compounds, quaternary ammonium salts, organotin and organozinc compounds,
Cyclohexylphenol compounds, imidazole and benzimidazole compounds, sulfamide compounds,
There are various antibacterial agents and fungicides such as active halogen compounds such as chlorinated isocyanuric acid and sodium, chelating agents, sulfite compounds, and antibiotics represented by penicillin. Also other LE West, "Water Quality Criteri
a ") Phot.Sci.and Eng., Vol 9, No. 6 (1965)
Fungicides described in JP-A-57-8542 and 58-10
Nos. 5145, 59-126, 533, 55-11
Various antibacterial agents described in U.S. Pat. Nos. 1,942 and 57-157244; antibacterial and antifungal agents described in Hiroshi Horiguchi, "Bacterial and antifungal chemistry" (published by Sankyo in 1982) can be used.

The hardener used in the recording medium of the present invention is not particularly limited, and known hardeners such as aldehydes (formaldehyde, glyoxal, glutaraldehyde, etc.) and aziridines (eg, PB Report 1)
9,921, U.S. Pat. Nos. 2,950,197, 2,964,404, 2,983,611 and 3,271,175, JP-B-46-40.
No. 898, those described in JP-A-50-91315), isoxazoles (for example, US Pat.
No. 1,609), an epoxy system (for example,

[0038]

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For example, see US Pat. No. 3,047,394.
No. 1, West German Patent 1,035,663, British Patent No. 1,
No. 033,518, JP-B-48-35495.
Publication), vinyl sulfone type (for example,
1,3,5-triacryloyl-hexahydro-s-triazine, bis (vinylsulfonyl) methyl ether,
N, N'-ethylene-bis (vinylsulfonylacetamide) ethane, N, N'-trimethylene-bis (vinylsulfonylacetamide) and the like, for example, PB Report 19,920, West German Patent No. 1,100, No. 942, No. 2,337,412, No. 2,545,722, No. 2,635,518, No. 2,742,308, No. 2,749,260, British Patent No. 1,251, 091
No., Japanese Patent Application No. 45-54236, 48-110996
No. 3,539,644, US Pat.
0,911), acryloyl series (for example, those described in Japanese Patent Application No. 48-27949, U.S. Pat. No. 3,640,720), carbodiimide series (for example, U.S. Pat. No. 2,938,892.
Nos. 4,043,818 and 4,061,499, Japanese Patent Publication No. 46-38715, Japanese Patent Application No. Sho 4
9-15095), triazines (for example, 2,4-dichloro-6-hydroxy-s-triazine and the like, and also, for example, West German Patent 2,410,9).
Nos. 73 and 2,553,915; U.S. Pat.
No. 5,287, those described in JP-A-52-12722), N-methylols (dimethylol urea, methylol dimethylhydantoin, etc.), dioxane derivatives (2,3-dihydroxydioxane, etc.), muco It is possible to use a hardening agent of a halogen acid type (mucochloric acid, mucofenoxycyclolic acid, etc.), dialdehyde starch, 1-chloro-6-hydroxytriazinylated gelatin, maleimide type, acetylene type, methanesulfonic acid ester type. it can.

Examples of the polymer hardener include a polymer having an aldehyde group described in US Pat. No. 3,396,026 (for example, a copolymer of acrolein) and the like.
No. 3,362,827, Research Disclosure No. 17333 (1978), etc., polymers having a dichlorotriazine group, U.S. Pat.
No. 878, a polymer having an epoxy group, Research Disclosure 16725 (1978), U.S. Pat. No. 4,161,407, JP-A-54-6503.
No. 3, 56-142524 and the like, and a polymer having an active vinyl group or a group which can be a precursor thereof, and a polymer having an active ester group described in JP-A-56-66841. The addition amount of the hardening agent is optional, but about 0.1 to 30 wt.
%, Especially 0.5 to 10% by weight, is suitable.

The support is made of chemical pulp such as LBKP and NBKP, GP, PGW, RMP, TMP, CTMP, CM
P, CGP and other mechanical pulp, DIP and other used paper pulp and the like, and if necessary, conventional known pigments, binders,
Additives such as a sizing agent, a fixing agent, a cationic agent, and a paper strength enhancer are mixed, and those manufactured by various apparatuses such as a fourdrinier paper machine and a circular net paper machine can be used. In addition to these supports, any of resin-coated paper such as polyethylene, synthetic paper, and plastic film sheets such as polyester films may be used. The support has a thickness of 10 to 250 μm and a basis weight of 10
~250g / m ² is desirable. The support may be provided with the ink receiving layer and the back coat layer as they are, or after providing a size press or an anchor coat layer with starch, polyvinyl alcohol or the like, the ink receiving layer and the back coat layer may be provided. Further, the support may be subjected to a flattening treatment by a calender device such as a machine calender, a TG calender, and a soft calender.

The reflective support that can be used in the present invention includes, for example, the following. For example, a paper or plastic support having both surfaces laminated with a polyolefin (eg, a homopolymer such as polyethylene, polystyrene, polyethylene terephthalate, or polybutene, or a copolymer of any combination thereof) (provided that titanium oxide, zinc oxide, and the like are included in the polyolefin) It is preferable that a coloring pigment such as a white pigment, cobalt blue, ultramarine blue, neodymium oxide or the like is contained).

The thickness of the polyolefin layer is not particularly limited, but is preferably from 10 to 100 microns, particularly preferably from 15 to 50 microns, more preferably from 20 to 35 microns. The surface shape of the polyolefin may be any shape such as a mirror surface, a surface having regular irregularities, and a surface having irregular irregularities, but the surface side is preferably a mirror surface. The surface of the polyolefin layer is subjected to a surface activation treatment such as a corona discharge treatment or a flame treatment, and an undercoat layer is provided if necessary, and a photographic emulsion layer is coated thereon and used. There is no particular limitation on the white pigment that can be contained in the surface-side polyolefin, but titanium oxide and zinc oxide are preferable, and anatase-type titanium oxide is particularly preferable. To improve dispersibility, 50% or less of zinc oxide is used. It is preferable to use them in combination. The amount of the white pigment contained in the polyolefin is preferably 5% by weight or more, and more preferably 10 to 50% by weight.
% By weight, especially 15% to 30%.

The coloring pigment which can be contained in the polyolefin on the surface side is not particularly limited, but those which can withstand a coating temperature of 300 ° C. or more, such as cobalt blue, ultramarine blue and neodymium oxide, are desirable. The amount of the tinting pigment used is 0.1 to 3% by weight based on the white pigment. In order to realize the surface reflection characteristics aimed at by the present invention, the selection and the amount of the tinting pigment are particularly important. Even in pigments referred to as ultramarine blue, colors vary greatly depending on manufacturers and product numbers. Therefore, it is desirable to mix and use various pigments so as to obtain the surface reflection characteristics of the present invention. When the support is a polyethylene laminated paper containing a white pigment such as titanium oxide, the back layer is preferably designed to have an antistatic function and to have a surface resistivity of 10 ¹² Ω · cm or less.

The image recording medium of the present invention may contain an anti-fading agent. Examples of the anti-fading agent include antioxidants,
There are UV absorbers or some metal complexes. Examples of the antioxidant include chroman compounds, coumaran compounds, phenol compounds (eg, hindered phenols), hydroquinone derivatives, hindered amine derivatives, and spiroindane compounds. In addition, Japanese Unexamined Patent Publication
The compounds described in 1-159,644 are also effective. Examples of ultraviolet absorbers include benzotriazole-based compounds (such as U.S. Pat. No. 3,533,794), 4-thiazolidone-based compounds (such as U.S. Pat. No. 3,352,681), and benzophenone-based compounds (Japanese Unexamined Patent Publication No. 2,784), and JP-A Nos. 54-48,535 and 62-1.
36, 641 and 61-88, 256. Further, ultraviolet absorbing polymers described in JP-A-62-260152 are also effective. Examples of metal complexes include U.S. Pat. Nos. 4,241,155 and 4,245.
No. 018, columns 3-36, No. 4,254,195, No. 3
Columns 8 to 8, JP-A-62-174,741 and JP-A-61-8
8, 256, pages 27-29, 63-199,248
And compounds described in JP-A Nos. 1-75,568 and 1-74,272.

The water-soluble dye contained in the aqueous ink used for the recording medium of the present invention may be any dye having at least one sulfo group in the molecule. For example, JP-A-49-
89534, JP-B-54-16243, JP-B-54
No. 16244, Japanese Patent Publication No. 54-16245, Japanese Unexamined Patent Publication No.
The following dyes can be used in addition to the dyes disclosed in JP-A-2-96105, JP-A-52-146307, JP-A-53-77706, JP-B-54-21765, and JP-A-54-89811. .

[I] Direct dye CIDirect Yellow 27 (CI 13950) CIDirect Yellow 28 (CI 19555) CIDirect Yellow 33 (CI 29020) CIDirect Yellow 39 CIDirect Yellow 58 CIDirect Yellow 86 CIDirect Yellow 100 CIDirect Red 63 〃 〃 75 (CI 25380) 〃 〃 79 (CI 29065) 〃 〃 80 (CI 35780) 〃 〃 83 (CI 29225) 〃 〃 ９９ 99 〃 〃 ２２０ 220 〃 〃 ２４ 224 CIDirect Vlolet 47 (CI 25410) 〃 〃 ４８ 48 (CI 29125) 〃 〃 ５１ 51 (CI 27905) 〃 〃 ９０ 90 〃 〃 〃 94

CIDirect Blue 1 (CI 24410) ８ 〃 8 〃 〃 71 (CI 34140) 〃 〃 76 (CI 24411) 〃 〃 78 (CI 34200) 〃 〃 ８０ 80 〃 〃 ８６ 86 (CI 74180) (〃 〃 ９０ 90 〃 〃 １０６ 106 (CI 51300) 〃 〃 108 (CI 51320) 〃 〃 １２３ 123 (CI 26705) CI 〃 １６ 163 (CI 33560) 〃 〃 １６ 165 CIDirect Black 19 (CI 35255) 〃 ３８ 〃 38 (CI 30235) 〃 〃 71 (CI 25040) 〃 〃 74 (CI 34180) 〃 〃 〃 75 (CI 35870) 〃 〃 １１２ 112 〃 〃 117

[II] Acid Dye CI Acid Yellow 17 (CI 18965) １９ 〃 19 〃 〃 (25 (CI 18835) 〃 〃 ２９ 29 (CI 18900) 〃 〃 ３８ 38 (CI 25135) 〃 〃 ４９ 49 〃 ５９ 59 〃 〃 ６１ 61 〃 〃 ７２ 72 CI Acid Red 1 (CI 18050) 〃 〃 ８ 8 (CI 14900) 〃 〃 32 (CI 17065) 〃 〃 〃 37 (CI 17045) 〃 〃 (42 (CI 17070) ５７ 〃 ５７ 57 〃 〃 〃 115 (CI 27200) 〃 〃 119 〃 〃 131 〃 〃 133 (CI 17995) 〃 〃 〃 134 (CI 24810) 〃 〃 154 (CI 24800) 〃 〃 186 (CI) 18810) 〃 〃 〃 249 (CI 18134) 〃 〃 〃 254 〃 〃 ５６ 256

CI Acid Violet 11 (CI 17060) 〃 ３４ 34 (CI 61710, 61800) 〃 ７５ 75 CI Acid Blue 29 (CI 20460) 〃 〃 １２６ 126 〃 〃 171 〃 〃 〃 175 〃 〃 183 CI Acid Black 1 (CI 20470) 〃 〃 24 (CI 26370) 〃 〃 26 (CI 27070) 〃 〃 ４８ 48 (CI 65005) 〃 〃 ５２ 52 (CI 15711) 〃 〃 〃 58 〃 〃 ６０ 60 〃 〃 〃 107 〃 １０９ 109 〃 〃 119 〃 〃 １３１ 131 〃 〃 〃 155

Further, the aqueous ink that can be used in the present invention can contain various oxidizing agents that can be used in aqueous inks, such as wetting agents, solubilizing agents, and surfactants. The first advantage of the present invention is that ink jet recording having high water absorption can be easily obtained.
High resolution, high image density without ink bleeding or bleeding during inkjet recording, third, good color transparency, and fourth, high-density, glossy images. is there.

[0052]

【Example】

Comparative Example-A Aggregated Particles of Sol Particles 13 parts by weight of polyvinyl alcohol were added to 100 parts by weight (solid content) of boehmite sol (AS-3, manufactured by Catalyst Kasei Co., Ltd.) having a diameter of 150 nm, and water was further added to obtain a solids concentration of 15 parts by weight. % Of the coating solution was prepared. This coating solution was applied to a 100 μm thick polyethylene terephthalate (P
ET) The film was coated using a bar coater such that the coating amount was 15 g / m ² in terms of solid content. The water content immediately after the coating was (566%) in terms of (water / solid content). This was dried to reduce the water content to 350%.

Examples 1 to 10 The samples of Comparative Examples-A were overcoated with the polymer mordant solution shown in Table 1 and dried to prepare Examples 1 to 10. The amount of the polymer mordant was 3 g / m ² as a solid component. Using these samples, printing was performed with an inkjet printer “Kaleida” of Fuji Photo Film.
The printed sample was placed in an incubator controlled at 40 ° C. and 90% RH for 2 weeks, taken out, and the bleeding state of the printed image was visually observed. "〇" indicates that the bleeding is almost the same as immediately after printing, and "△" indicates that the bleeding is slightly different.
In Table 1, those with severe bleeding are indicated by "x" and described in Table 1.

[0054]

[Table 1]

[0055]

From the results shown in Table 1, it is understood that the recording medium of the present invention has improved bleeding of printed images during storage.

Claims (1)

[Claims] 1. An image recording medium having an ink absorbing layer containing a pseudo-boehmite and a mordant on a support.