JP2005280150A - Inkjet recording material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inkjet recording material which has high ink absorbency and high image density, and which has a muted and deep mat tint. <P>SOLUTION: In the inkjet recording material (1), at least 2 laminated ink absorbing layers are provided on a substrate, and an outermost layer of the ink absorbing layer contains a cationic water-soluble substance, a binder and a pigment. The inkjet recording material (1) is characterized in that the pigment contains 5-55 mass% colloidal particles and 45-95 mass% porous amorphous silica. In the inkjet recording material (2), the inkjet recording material is characterized as follows: a mean particle diameter, measured by a Coulter counter method, of the porous amorphous silica is 3 μm or less; and oil absorption based on JIS K5101 is 180 ml/100 g or more. In the inkjet recording material (3), the inkjet recording material (1) or (2) is characterized in that a value of 75° gloss of the outermost layer is less than 20%. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an ink jet recording material, and more particularly to a matte ink jet recording material having high ink absorbability and image density, and having a calm and deep feel.

  As a recording material used in the ink jet recording method, a porous ink receiving layer comprising a pigment such as amorphous silica and a hydrophilic binder such as polyvinyl alcohol on a support called ordinary paper or ink jet recording paper. The recording material provided is generally known.

  A recording material provided with a porous ink-receiving layer made of an inorganic pigment on a paper support mainly composed of natural pulp has the advantage of high ink absorbency, but on the other hand, high gloss is obtained. Absent. On the other hand, a recording material in which an ink receiving layer containing inorganic fine particles having an average secondary particle diameter of less than 1 μm is provided on a polyolefin resin-coated paper as a recording material capable of obtaining photo-like high gloss is known. There remains a problem in terms of absorption capacity.

  Accordingly, an ink jet recording material is proposed in which an ink receiving layer made of an inorganic pigment is provided on a paper support mainly composed of natural pulp, and a glossy expression layer containing alumina or colloidal silica is formed on the ink receiving layer. (For example, Patent Documents 1 and 2).

  As described above, high gloss is generally demanded, but on the other hand, there is also a demand for a recording material from which a deep and calm image can be obtained. In order to obtain such a recording material, the gloss must be kept low and the image density must be increased, but the image density tends to decrease as the glossiness is lowered.

In recent years, inks composed of water-soluble dyes (dye inks) and inks composed of colored pigments (aqueous pigment inks) have been used as inks for inkjet recording. There was no recording material that could not be obtained and could reproduce a calm image with a deep matte tone.
Japanese Patent Laid-Open No. 7-101142 JP 2001-96908 A

  Accordingly, an object of the present invention is to provide an ink jet recording material which has a high ink absorbability, can provide a matte tone and a deep and calm image. In particular, an object of the present invention is to provide an ink jet recording material that can sufficiently satisfy the above-described characteristics for pigment ink as well as dye ink.

The above object of the present invention has been basically achieved by the following ink jet recording material.
(1) An ink jet recording material having an ink receiving layer having at least two layers laminated on a support, wherein the outermost layer of the ink receiving layer contains a cationic water-soluble substance, a binder, and a pigment, An ink jet recording material, wherein the pigment contains 5 to 55% by mass of colloidal particles and 45 to 95% by mass of porous amorphous silica.
(2) The ink jet recording according to claim 1, wherein the porous amorphous silica has an average particle size of 3 μm or less by a Coulter counter method and an oil absorption by JIS K5101 of 180 ml / 100 g or more. material.
(3) The ink jet recording material according to claim 1 or 2, wherein the outermost layer has a 75 degree gloss value of less than 20%.

  According to the ink jet recording material of the present invention, a calm image having high image density, matte tone and depth can be obtained. It is particularly suitable for pigment ink.

  Examples of natural pulp used in the paper support of the present invention include hardwood bleached sulfite pulp (LBSP), hardwood bleached kraft pulp (LBKP), softwood bleached sulfite pulp (NBSP), and softwood bleached kraft pulp (NBKP). It is advantageously used. In addition to wood pulp, non-wood pulp, synthetic pulp, synthetic fiber, or recycled pulp may be used as necessary.

  Pulp is usually beaten by a beating machine such as a double disc refiner in order to improve paper properties, such as paper properties such as strength, smoothness, and uniformity of formation.

  The beaten pulp slurry is made by a paper machine such as a long paper machine, a twin wire paper machine, or a round paper machine. At this time, various additives such as a dispersion aid, a dry paper strength enhancer, a filler, a sizing agent, and a fixing agent can be added as necessary. Furthermore, if necessary, pH adjusting agents, dyes, colored pigments, fluorescent brighteners, and the like can be added.

  A size press or an anchor coat layer with starch, polyvinyl alcohol, or the like can be provided on the paper that has been made. The ink receiving layer may be provided directly on the base paper (paper support) produced in this manner, but for the purpose of smoothing the base paper surface in advance, a calendar process such as a machine calendar, a TG calendar, a soft calendar is performed. Is preferred.

  The surface on which the ink receiving layer of the paper support used in the present invention is coated is preferably smooth, the Beck smoothness is preferably 30 seconds or more, and more preferably 50 seconds or more. The upper limit is about 200 seconds. These Beck smoothnesses can be obtained by adjusting the type of pulp, the fiber length, and the type and amount of the filler, but are preferably calendered as described above. By increasing the smoothness of the surface of the paper support on which the ink receiving layer is applied, it is preferable because the image density, particularly the image density of the pigment ink, can be increased.

  The above-mentioned Beck smoothness is the time required for 10 ml of air to pass through as determined by JIS-P8119 “Smoothness test method using paper and paperboard Beck tester”. The smoothness increases as this time increases.

In the ink jet recording material of the present invention, at least two or more layers of the ink receiving layer are laminated on the support, and the outermost ink receiving layer contains at least a cationic water-soluble substance, a binder, and a pigment, The pigment contains 5 to 55 mass% colloidal particles and 45 to 95 mass% porous amorphous silica.
The porous amorphous silica has an average particle size of 3 μm or less by the Coulter counter method and an oil absorption by JIS K5101 of 180 ml / 100 g or more.
Further, the 75 ° gloss value of the outermost layer is less than 20%.
By using the ink jet recording material as described above, a mat-like material having a high image density can be obtained regardless of differences in ink jet recording methods such as dye ink and water-based pigment ink.

When only one ink-receiving layer is provided on the support, the image density with the pigment ink is good, but the image density with the dye ink is poor due to insufficient ink absorption speed and ink absorption capacity.
If the outermost ink-receiving layer does not contain a cationic water-soluble substance, the dye ink is not fixed, not only the image coloring property is deteriorated but also the water resistance is deteriorated. Moreover, if a binder is not included, the adhesiveness of a coating layer and a support body will deteriorate, and depending on the case, a coating layer may peel from on a support body. Further, if the pigment is not included, the ink absorbability deteriorates, and a high image density cannot be obtained.

In the present invention, the pigment contained in the outermost ink receiving layer contains 5 to 55% by mass of colloidal particles and 45 to 95% by mass of porous amorphous silica.
If the colloidal particles are less than 5% by mass, the adsorption of the pigment particles in the aqueous pigment ink cannot be expected, and the image density in the aqueous pigment ink is lowered.
If it exceeds 55% by mass, the glossiness of the surface of the ink receiving layer is increased, and a glare is produced, and the matte surface quality is lost.
If the porous amorphous silica is less than 45% by mass, the absorbability of the dye ink is lowered and the image density of the dye ink is inferior. If it exceeds 95% by mass, the coating layer strength is deteriorated. Absorption becomes excessive, pigment particles in the aqueous pigment ink sink without being adsorbed on the outermost surface, and the image density in the aqueous pigment ink decreases.

In the present invention, the porous amorphous silica has an average particle size of 3 μm or less by the Coulter counter method and an oil absorption by JIS K5101 of 180 ml / 100 g or more.
If the average particle diameter of the porous amorphous silica exceeds 3 μm, the colloidal particles used together adversely affect the adsorption of the pigment particles in the aqueous pigment ink on the outermost surface, and the image density is lowered.
As the porous amorphous silica, when the oil absorption amount according to JIS K5101 is less than 180 ml / 100 g, the coating layer strength is high, and the image density with the aqueous pigment ink is high, but the ink absorption ability is favorable. The image density in the case of dye ink is lowered.

  In the present invention, the 75 ° gloss value of the outermost layer is less than 20%. If the 75 ° gloss value is 20% or more, the glossiness of the surface is conspicuous and the matte surface quality is impaired, which is not preferable.

  The aqueous pigment ink referred to in the present invention is a recording liquid comprising a pigment, an aqueous medium, and other additives, and the additives can be appropriately selected within a range that does not adversely affect the recording properties that are the purpose of the ink. is there. Among the pigments, pigments used as black ink include C.I. I. Examples of pigments used as cyan ink, such as Pigment Black 7, include C.I. I. PigmentBlue1, C.I. I. PigmentBlue 2, C.I. I. PigmentBlue 15: 3, C.I. I. Examples of pigments used as magenta ink such as Pigment Blue 16 include C.I. I. PigmentRed5, C.I. I. PigmentRed 48: 2, C.I. I. PigmentRed 57: 1, C.I. I. PigmentRed 112, C.I. I. Examples of pigments used as yellow ink, such as Pigment Red 122, include C.I. I. Pigment Yellow 1, C.I. I. Pigment Yellow 3, C.I. I. Pigment Yellow 13, C.I. I. Pigment Yellow 83 or the like is a representative example, but is not particularly limited as long as it is a pigment capable of forming a water-based ink.

As the aqueous medium, water and a water-soluble organic solvent, a dispersant, and other additives mixed as necessary are used, but as water in this case, tap water containing various ions, etc. Instead, it is preferable to use ion-exchanged water that has been subjected to deionization treatment.
Examples of the water-soluble organic solvent include methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol, tert-butyl alcohol, and other alkyl alcohols having 1 to 4 carbon atoms; ethylene glycol , Propylene glycol, butylene glycol, diethylene glycol, triethylene glycol, etc., alkylene glycols having an alkylene group containing 2 to 6 carbon atoms, polyhydric alcohols such as glycerin, polyalkylene glycols, amides, ethers, etc. Is mentioned.

The dispersant is not particularly limited as long as it is a water-soluble resin. Specific examples include styrene- (meth) acrylic acid copolymers, alkylstyrene- (meth) acrylic acid copolymers, and styrene- (meth). Acrylic resins such as acrylic acid- (meth) acrylic acid alkyl ester copolymers, (meth) acrylic acid- (meth) acrylic acid alkyl ester copolymers, and alkali neutralized water-soluble synthetic resins such as salts thereof , Water-soluble resins such as polyvinyl alcohol, polyvinyl pyrrolidone and carboxymethyl cellulose, alkali-neutralized water-soluble natural resins such as rosin, shellac and casein, and various surfactants. These may be used alone or in combination of two or more. Can be used.
Moreover, as an additive, it is possible to use a pH adjuster, an antifoamer, a preservative, etc. as needed.

  In the ink jet recording material of the present invention, the ink-receiving layer contains, in addition to the pigment used for ink absorption, an adhesive, a cationic resin, and other additives such as a pigment dispersant, an additive. Sticky agent, fluidity improver, surfactant, antifoaming agent, antifoaming agent, mold release agent, foaming agent, penetrating agent, coloring dye, coloring pigment, fluorescent whitening agent, UV absorber, antioxidant, antiseptic An agent, an antibacterial agent, a waterproofing agent, a wet paper strength enhancer, a dry paper strength enhancer, and the like can be appropriately blended.

  In the present invention, as the pigment used in the ink receiving layer other than the outermost layer and the support, one or more known white pigments can be used. For example, light calcium carbonate, heavy calcium carbonate, kaolin, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc sulfide, zinc carbonate, satin white, aluminum silicate, diatomaceous earth, calcium silicate, magnesium silicate, synthetic non White inorganic pigments such as crystalline silica, colloidal silica, colloidal alumina, pseudoboehmite, aluminum hydroxide, alumina, lithopone, zeolite, hydrohalloysite, magnesium carbonate, magnesium hydroxide, styrene plastic pigment, acrylic plastic pigment, polyethylene, Organic pigments such as microcapsules, urea resins, and melamine resins can be used. Among the above-mentioned pigments, porous inorganic pigments are preferable, and examples include porous synthetic amorphous silica, porous magnesium carbonate, and porous alumina, and porous synthetic amorphous silica having a large pore volume is particularly preferable.

  In the present invention, it is also possible to use inorganic ultrafine particles as pigments used in the ink receiving layer other than the outermost layer and the support. The inorganic ultrafine particles in the present invention are inorganic fine particles having a primary particle diameter of 100 nm or less. For example, JP-A-1-97678, 2-275510, 3-281383, 3-285814, 3-285815, 4-92183, 4-267180 Pseudo boehmite sols proposed in Japanese Laid-Open Patent Publication No. 4-27517, etc., Japanese Patent Laid-Open Nos. 60-219083, 61-19389, 61-188183, 63-178074, Colloidal silica as described in JP-A-5-51470, etc., silica / alumina hybrid sol as described in JP-B-4-19037, JP-A-62-2286787, JP-A-10-119423 High-speed homogenization of ultrafine silica as described in JP-A-10-217601. Typical examples include smectite clays such as silica sol, hectite, and montmorillonite (JP-A-7-81210), zirconia sol, chromia sol, yttria sol, ceria sol, iron oxide sol, zircon sol, antimony oxide sol, etc. As mentioned. Gas phase method silica can also be used.

  Examples of the aqueous polymer binder that can be used as the adhesive contained in the ink receiving layer of the present invention include starch derivatives such as oxidized starch, etherified starch, and phosphate esterified starch; carboxymethylcellulose, hydroxyethylcellulose, and the like. Cellulose derivatives: conjugated diene copolymer latex such as casein, gelatin, soybean protein, polyvinyl alcohol, various modified polyvinyl alcohols, polyvinylpyrrolidone, maleic anhydride resin, styrene-butadiene copolymer, methyl methacrylate-butadiene copolymer Acrylic polymer latex such as acrylic acid ester and methacrylic acid ester polymer or copolymer; vinyl copolymer latex such as ethylene-vinyl acetate copolymer; or various copolymers thereof. Functional group-modified copolymer latex with functional group-containing monomers such as carboxy groups; aqueous adhesives such as thermosetting synthetic resins such as melamine resin and urea resin; acrylic acid esters and methacrylates such as polymethyl methacrylate Polymer or copolymer resin latex; polyurethane resin, unsaturated polyester resin, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral, alkyd resin latex and the like.

  The support in the present invention includes chemical pulps such as LBKP and NBKP, mechanical pulps such as GP, PGW, RMP, TMP, CTMP, CMP, and CGP, wood pulp such as waste paper pulp such as DIP, or kenaf, bagasse, Mainly non-wood pulp such as cotton and one or more kinds of conventionally known pigments, binders, sizing agents, fixing agents, yield improving agents, cationizing agents, paper strength enhancing agents, toning dyes and the like. It is a support produced by various devices such as a long net paper machine, a circular net paper machine, a twin wire paper machine, and art paper, coated paper having a coating layer on the base paper, It is also possible to use coated paper such as cast coated paper. Such a base paper and coated paper may be provided with an ink receiving layer as they are, or a calendar device such as a machine calendar, a TG calendar, or a soft calendar may be used to control flattening.

  In the present invention, a water-resistant opaque support can also be used. Examples of the water-resistant opaque support include synthetic paper, resin-coated paper, pigmented opaque film, and foam film. As the resin-coated paper, resin-coated paper obtained by coating the base paper or coated paper with resin can also be used.

Although the basic weight of the support body of this invention is not specifically limited, It is 50-350 g / m < ² >. In consideration of transportability, paper passing property, and the like in the printer device, it is particularly preferably 70 to 270 g / m ² .

The coating amount of the ink receiving layer is preferably determined based on the ink absorption capacity of the ink receiving layer and the adhesive strength between the ink receiving layer and the support that can withstand practical use, and the dry coating amount is 2. A range of 5 to 40 g / m ² is preferable. If the dry coating amount is less than 2.5 g / m ² , it is difficult for the coating layer that is an ink receiving layer to completely cover the support surface, and the ink absorption by the coating layer is not sufficient, Absorption unevenness or the like occurs, and the ink jet printing performance is adversely affected. In addition, when the dry coating amount exceeds 40 g / m ² , the adhesive strength between the ink receiving layer and the support becomes a level that cannot be practically used, and peeling of the coating layer from the support, which is called powdering off, occurs. Cause serious problems.

  As an ink jet recording material in the present invention, a coating layer may be provided on a support, and the coating layer may be used as an ink receiving layer as it is without post-treatment. The surface roughness may be controlled. Specific examples of the calendar include an embossed calendar, a machine calendar, a TG calendar, a super calendar, and a soft calendar. However, the calendar is not limited thereto, and the selection of the calendar may be appropriately performed depending on the material related to the surface structure of the sheet. .

  The colloidal particles in the present invention are colloidal particles suspended and dispersed in water. For example, alumina sol such as colloidal silica, boehmite, pseudoboehmite, etc., colloidal alumina, cationic aluminum oxide or hydrate thereof, or colloidal silica particle surface as disclosed in Japanese Patent Publication No. 47-26959 is alumina. Inorganic particles such as coated particles, conjugated diene copolymers such as polystyrene, methyl methacrylate, styrene-butadiene copolymer, methyl methacrylate-butadiene copolymer, polymers or copolymers of acrylic acid esters and methacrylic acid esters Organic polymer fine particles such as microcapsules, urea resins, and melamine can be used, and two or more of these can be used in combination.

  Further, the binder used in the ink receiving layer of the present invention includes starch derivatives such as oxidized starch, etherified starch and phosphate esterified starch, cellulose derivatives such as carboxymethylcellulose and hydroxyethylcellulose, casein, gelatin, soy protein, polyvinyl Alcohol or its derivatives, polyvinyl pyrrolidone, maleic anhydride resin, styrene-butadiene copolymer, conjugated diene copolymer latex such as methyl methacrylate-butadiene copolymer, polymer or copolymer of acrylate ester and methacrylate ester Functional group modification with functional group-containing monomers such as carboxyl groups of various polymers such as acrylic polymer latex such as acrylic polymer, vinyl polymer latex such as ethylene vinyl acetate copolymer, etc. Polymer Latec , Water-based adhesives such as thermosetting synthetic resins such as melamine resins and urea resins, polymers or copolymer resins of acrylic esters and methacrylic esters such as polymethyl methacrylate, polyurethane resins, unsaturated polyester resins, vinyl chloride Examples thereof include synthetic resin adhesives such as vinyl acetate copolymer, polyvinyl butyral, and alkyd resin.

  The blending amount of the binder is 5 to 70 parts by mass, preferably 5 to 50 parts by mass with respect to 100 parts by mass of the pigment. If the amount is less than 5 parts by mass, the coating strength of the glossy layer is insufficient, and 70 parts by mass. If it exceeds, the ink absorbability is lowered.

  Furthermore, in the ink receiving layer, as additives, pigment dispersants, thickeners, fluidity improvers, antifoaming agents, antifoaming agents, mold release agents, foaming agents, penetrating agents, colored dyes, colored pigments, fluorescent Brightening agents, ultraviolet absorbers, antioxidants, antiseptics, antibacterial agents, water resistance agents, wet paper strength enhancers, dry paper strength enhancers, and the like can also be appropriately blended.

  Examples of the ink receiving layer coating apparatus include a cast coater, various blade coaters, a roll coater, an air knife coater, a bar coater, a rod blade coater, a curtain coater, a short dwell coater, and a size press. Further, after the ink receiving layer is applied, it is possible to correct the curl by spraying humidified air and humidified steam on the back surface of the ink receiving layer with the support interposed therebetween.

  Examples of the present invention will be described below, but the present invention is not limited to these examples. Further, “parts” and “%” shown in the examples indicate parts by mass and mass% unless otherwise specified.

<Production of support>
After beating a mixed pulp consisting of 85% hardwood bleached kraft pulp and 15% softwood bleached sulfite pulp to 300 CSF, 3 parts cationized starch, 0.2 parts anionized polyacrylamide, A stock slurry was prepared by adding 0.3 part of an alkyl ketene dimer emulsion (as ketene dimer) and 0.4 part of polyamide epichlorohydrin resin. Thereafter, the stock slurry was formed on a paper web using a long paper machine, wet-pressed with a wet part, then treated with a smoothing roll, pressed with a subsequent drying part, and then dried. Thereafter, size drying is performed with a carboxy-modified polyvinyl alcohol solution in the middle of drying, the solid content adhesion amount is 2.0 g / m ^2, and drying is performed so that the base paper moisture finally obtained is 8% with absolutely dry moisture, Machine calendering was performed to obtain a support having a basis weight of 200 g / m ² .

<Ink-receiving layer coating liquid A (all solids are displayed below)>
Porous synthetic amorphous silica 100 parts Optical brightener 0.2 parts Silanol modified polyvinyl alcohol 15 parts Polyvinyl alcohol 15 parts Ethylene-vinyl acetate copolymer latex emulsion 15 parts Cationic resin 10 parts The coating solution concentration was adjusted to 15%.

<Ink-Receiving Layer Coating Liquid B (All solid contents are shown below)>
0.5 parts of nitric acid porous synthetic amorphous silica (average particle size 1.7 μm, oil absorption 355 ml / 100 g)
50 parts Colloidal particles (alumina sol) 50 parts Boric acid 0.2 parts Polyvinyl alcohol 15 parts Cationic resin 5 parts The above was mixed to adjust the coating solution concentration to 13%.

On one side of the support, the ink-receiving layer coating solution A was applied and dried so that the dry coating amount was 9 g / m ² . Next, the ink-receiving layer coating liquid B is applied and dried so as to have a dry coating amount of 3.5 g / m ^2, and supercalendering is performed for the purpose of smoothing the surface. Obtained material.

On one side of the support, the ink-receiving layer coating solution A was applied and dried so that the dry coating amount was 9 g / m ² . Next, the ink-receiving layer coating liquid B is applied and dried so as to have a dry coating amount of 8 g / m ^2, and supercalender treatment is performed for the purpose of smoothing the surface, whereby the ink jet recording material of Example 2 is obtained. Obtained.

(Comparative Example 1)
After coating and drying only the ink receiving layer coating liquid B of Example 1 on the support with a dry coating amount of 8 g / m ² , supercalender treatment was performed for the purpose of smoothing the surface, and the inkjet of Comparative Example 1 A recording material was obtained.

<Ink-Receiving Layer Coating Liquid C (All solid contents are shown below)>
0.5 parts of nitric acid porous synthetic amorphous silica (average particle size 1.7 μm, oil absorption 355 ml / 100 g)
25 parts Colloidal particles (alumina sol) 75 parts Boric acid 0.2 parts Polyvinyl alcohol 15 parts Cationic resin 5 parts The above was mixed to adjust the coating solution concentration to 13%.

(Comparative Example 2)
An ink jet recording material of Comparative Example 2 was obtained in exactly the same manner as in Example 1 except that the ink receiving layer coating liquid B of Example 1 was changed to the ink receiving layer coating liquid C.

<Ink-Receiving Layer Coating Liquid D (All solid contents are shown below)>
Nitric acid 0.5 parts Colloidal particles (alumina sol) 100 parts Boric acid 0.2 parts Polyvinyl alcohol 15 parts Cationic resin 5 parts The above was mixed to adjust the coating solution concentration to 13%.

(Comparative Example 3)
An ink jet recording material of Comparative Example 3 was obtained in the same manner as in Example 1 except that the ink receiving layer coating liquid B of Example 1 was changed to the ink receiving layer coating liquid D.

<Ink-Receiving Layer Coating Liquid E (All solid contents are shown below)>
Porous synthetic amorphous silica (average particle size 1.7 μm, oil absorption 355 ml / 100 g)
100 parts Silanol modified polyvinyl alcohol 40 parts Cationic resin 10 parts The above was mixed to adjust the coating solution concentration to 11%.

(Comparative Example 4)
An ink jet recording material of Comparative Example 4 was obtained in the same manner as in Example 1 except that the ink receiving layer coating solution B of Example 1 was changed to the ink receiving layer coating solution E.

<Ink-Receiving Layer Coating Liquid F (All solid contents are shown below)>
Nitric acid 0.5 parts Porous synthetic amorphous silica (average particle size 2.1 μm, oil absorption 115 ml / 100 g)
50 parts Colloidal particles (alumina sol) 50 parts Boric acid 0.2 parts Polyvinyl alcohol 15 parts Cationic resin 5 parts The above was mixed and adjusted to 13%.

(Comparative Example 5)
An ink jet recording material of Comparative Example 5 was obtained in the same manner as in Example 1 except that the ink receiving layer coating liquid B of Example 1 was changed to the ink receiving layer coating liquid F.

  For the various ink jet recording materials produced as described above, the ink jet recording aptitude (image bleeding, print density) of the surface having the ink receiving layer, the 75 degree glossiness, and the surface glare sensory evaluation were performed as follows. went. The results are shown in Table 1.

<Inkjet recording characteristics>
PM-4000PX (aqueous pigment ink) and PM-G800 (dye ink) manufactured by Seiko Epson, Inc. Solid printing was performed by a method of recording a solid color (red, green, blue) of a total of seven colors in a 2 cm × 2 cm square with a horizontal line arranged without gaps. Each color boundary portion of the printed portion of the PM-G800 (dye ink) printed matter was visually evaluated, and image bleeding was determined according to the following criteria.
A: Each color that touches the boundary is separated by a clean line, and one color does not ooze out to the other color side.
B: The boundary of each color is blurred, and one color is slightly exuded to the other color side.
C: The boundary of each color is not known and the bleeding to the adjacent color is large.
Other than A, a problem occurs in practice.
Next, the optical reflection density of the black printing part of PM-4000PX (aqueous pigment ink) and PM-G800 (dye ink) was measured using a reflection densitometer Macbeth RD919 type using the above pattern.

<75 degree gloss value>
Next, the 75-degree gloss value of each inkjet recording material was measured using a digital gloss meter GM-26D (75 ° -75 °) type (manufactured by Murakami Color Research Laboratory).
<Evaluation of surface glare>
Sensory evaluation about the glare on the surface was performed by 10 testers according to the following criteria.
A: 7 or more people do not feel glare on the surface.
B: Four to six people who do not feel glare on the surface.
C: Three or less people do not feel glare on the surface.
C was determined to have glare.

  As is apparent from the above results, the ink jet recording material of the present invention is a mat-like ink jet recording material having a high image density in the printed part and a calm and deep image in both ink jet recording methods using dye ink and aqueous pigment ink. is there. On the other hand, the inkjet recording material of the comparative example has a mat-like surface quality that is the object of the present invention because the image density of the printed portion is low, the ink absorbability is poor, or the surface is glaring due to the inkjet recording method. I can't.

Claims (3)

  An ink-jet recording material comprising an ink-receiving layer having at least two layers laminated on a support, wherein the outermost layer of the ink-receiving layer contains a cationic water-soluble substance, a binder, and a pigment, An ink jet recording material comprising 5 to 55% by mass of colloidal particles and 45 to 95% by mass of porous amorphous silica.   The ink jet recording material according to claim 1, wherein the porous amorphous silica has an average particle size of 3 µm or less by a Coulter counter method and an oil absorption by JIS K5101 of 180 ml / 100 g or more.   3. The ink jet recording material according to claim 1, wherein the outermost layer has a 75 degree gloss value of less than 20%.