JP2002127594A - Ink for forming ink jet acceptive layer and recording sheet using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink capable of easily forming an ink jet ink acceptive layer at a necessary position of a base having excellent water resistance of printed ink, high print quality of printing without bleeding of a print image and excellent printing ink suitability. SOLUTION: The ink for forming the ink jet acceptive layer comprises a cationic resin of a state of an aqueous solution, or water dispersing liquid blended with porous fine particles of 5 to 60 mass pts. with 5 to 12 mass pts., as its resin content to 100 mass pts. of a vehicle containing a glycol solvent having a boiling point of 100 deg.C or higher as a main component. The ink preferably further comprises a binder resin to be blended.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an ink for forming an ink jet receiving layer and a recording sheet using the same.

[0002]

2. Description of the Related Art Conventionally, an ink-jet printer using an ink-jet ink has many advantages such as easy colorization, low cost, high resolution, and excellent storability. However, when printing on high-quality paper, the fixability of the ink is inferior, and the printed ink remains on the surface of the base material.Therefore, there is a problem that the guide roll becomes dirty or the printed image becomes dirty when printing is continuously performed. In addition, there were problems that ink jet printing blurred and water resistance was poor. In particular, when used in the information industry field, barcodes printed with ink-jet printing are blurred and difficult to read, mail items printed with ink-jet are exposed to rain outdoors, or accidentally splashed with water. In some cases, there is a problem that the printed content is melted and the printed content becomes invisible.

An ink jet recording sheet used in an ink jet recording system has a high density of print dots,
It is required that the color tone be bright and vivid, that the ink be absorbed quickly and that the diffusion of print dots in the horizontal direction be not unnecessarily large and that the periphery be smooth and not blurred. . Many techniques have been conventionally proposed to solve these problems. For example, JP-A-52-53012 discloses an ink jet recording sheet obtained by moistening a paint for surface processing on a paper-size base paper, and JP-A-55-5830 discloses an ink-absorbing coating layer on the surface of a support. JP-A-56-157 discloses an ink-jet recording sheet containing non-colloidal silica powder as a pigment in a layer to be coated. JP-A-57-107878 discloses an inorganic pigment and an organic pigment. An ink jet recording paper using a pigment is disclosed in
Japanese Patent No. 10287 discloses an ink jet recording paper having two pore distribution peaks, and Japanese Patent Application Laid-Open No. 62-111782 discloses an ink jet recording paper comprising two upper and lower porous layers. , JP 59
JP-A-123696 and JP-A-60-18383 disclose an ink jet recording sheet having an irregular crack, which is disclosed in JP-A-61-135786 and JP-A-61-18686.
JP-A-148092 and JP-A-62-149475 disclose an ink jet recording sheet having a fine powder layer, which is disclosed in JP-A-63-252779 and JP-A-1-10.
JP-A-8083, JP-A-2-136279, JP-A-3-65376 and JP-A-3-27976 disclose an ink jet recording paper containing a pigment having specific physical properties and fine particle silica. 57-14
No. 091, JP-A-60-219083, JP-A-60-219084, JP-A-61-20797
JP, JP-A-61-188183, JP-A-5-188183
514703, JP-A-5-278324,
JP-A-6-92011, JP-A-6-183134
JP, JP-A-7-137431 and JP-A-7-137431
JP-A-276789 and JP-A-3-276789 disclose ink jet recording paper containing fine particle silica such as colloidal silica. 25
JP-A-1488, JP-A-4-67986, JP-A-4-263983, and JP-A-5-16517 propose ink jet recording paper containing alumina hydrate fine particles. However, when the ink receiving layer is composed of only a layer having many voids for absorbing and holding ink, the ink receiving layer having many voids has many microscopic irregularities on an interface with air and a film surface. In other words, light incident on the ink receiving layer is scattered or transmission is impeded, so that gloss is hardly produced or opaque. In addition, the formation of voids has the disadvantage that the smoothness of the film surface is reduced due to the unevenness of the pigment itself and the unevenness of the secondary aggregates of the pigment, resulting in poor gloss. Therefore, for the purpose of imparting gloss, JP-A-7-101142 discloses a method of sequentially laminating a gloss expression layer composed of colloid particles having an average particle diameter of 300 nm or less typified by amorphous silica alumina as a main component in an ink receiving layer, Japanese Patent Application Laid-Open No. HEI 7-117335 discloses a technique for imparting high glossiness by further calendering thereafter, but this method is not sufficient because ink absorption and glossiness conflict with each other. . Furthermore, it is difficult for light to reach the ink that has penetrated into the voids, which makes the image whitish, and has disadvantages such as reduced color reproducibility and color density.The ink-receiving layer with many voids has high gloss and transparency. It is difficult to obtain an image with high color reproducibility and high color density while maintaining image quality. Also, JP-A-11-321084 and JP-A-2000-4339.
Japanese Patent Application Publication No. 8 (1994) discloses an ultraviolet curable resin as a binder, but has a problem that water resistance is not sufficient.

On the other hand, paper (ink-jet paper) or film (OHP film) having an ink-jet ink receiving layer formed thereon has been devised (JP-A-6-18313).
No. 5, JP-A-6-297830, Japanese Patent Publication No. Hei 8-297.
22608, JP-A-8-72390, JP-A-8-291496, etc.). However, these inks have improved ink absorbency, but have a problem that the cost is high because the ink jet ink receiving layer is provided on the entire surface of the base material, and that they are not suitable for offset printing because they affect the H liquid. Was.

[0005]

SUMMARY OF THE INVENTION It is a first object of the present invention to solve the conventional problems, to have excellent ink-jet ink absorbability in an ink-jet ink receiving layer formed on a substrate, and to provide a printed ink-jet ink having a high water resistance. An ink for forming an ink-jet ink receiving layer, which can improve the printability and improve the print quality of the ink-jet printing by preventing bleeding of the printed image. A second object of the present invention is to provide an ink for forming an ink-jet ink-receiving layer that can easily form an ink-jet ink-receiving layer at a predetermined location. It is another object of the present invention to provide a recording sheet having an ink-jet ink receiving layer formed in the above-described manner.

[0006]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, have used a vehicle mainly containing a specific solvent, and a specific cationic resin and a porous resin for the vehicle. The present inventors have found that the problem can be solved by using an ink for forming an ink jet receiving layer containing a specific amount of fine particles, and have completed the present invention.

That is, the ink for forming an ink jet receiving layer according to the first aspect of the present invention is in the form of an aqueous solution or an aqueous dispersion with respect to 100 parts by weight of a vehicle containing a glycol solvent having a boiling point of 100 ° C. or higher as a main component. 5 to 120 parts by mass of the cationic resin and 5 to 60 parts by mass of the porous fine particles as the resin component.

[0008] By using an ink for forming an ink jet receptive layer in which a specific amount of a cationic resin and a porous fine particle in the form of an aqueous solution or an aqueous dispersion are blended with a vehicle containing a specific solvent as a main component, a special drying is achieved. No equipment is required, and the ink-jet ink receiving layer formed on the base material has excellent ink-jet ink absorption properties, does not cause bleeding of the printed image, and can improve the water resistance of the printed ink-jet ink. Quality can be improved. Furthermore, because of the excellent printing ink suitability, an ink-jet ink receiving layer can be easily formed at a predetermined portion of the base material, so that the cost can be reduced and the offset printing is not affected.

According to a second aspect of the present invention, there is provided the ink for forming an ink jet receiving layer according to the first aspect of the invention, wherein a vehicle further containing a binder resin is used. Further, by blending a binder resin, the ink-jet ink receiving layer formed on the base material becomes more resistant to rubbing, so that the porous fine particles do not separate or the ink-jet ink receiving layer does not peel even when rubbed with an OCR reader or the like.

According to a third aspect of the present invention, there is provided a recording sheet comprising an ink-jet ink receiving layer formed on at least a predetermined portion of at least one surface of a substrate by using the ink for forming an ink-jet receiving layer according to the first or second aspect. It is characterized by having a layer.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS It is essential that the ink for forming an ink jet receiving layer of the present invention uses a vehicle mainly containing a glycol solvent having a boiling point of 100 ° C. or higher.
A specific amount of the cationic resin and the porous fine particles in the form of an aqueous solution or aqueous dispersion is blended with the vehicle. The use of such a glycol solvent eliminates the need for a special drying device.

The glycol-based solvent used in the present invention is a medium- and high-boiling solvent (having a boiling point of 100 ° C. or higher) that can be mixed with water. Specifically, for example, glycol (glycerin, ethylene glycol, diethylene glycol, Triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol)
And glycol derivatives (ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monoethyl acetate Butyl ether acetate), and mixtures of two or more thereof.

The cationic resin used in the present invention is an oligomer or polymer of a primary to tertiary amine or quaternary ammonium salt in the form of an aqueous solution or an aqueous dispersion. Specific examples of particularly preferred cationic resins include, specifically, for example, dimethylamine / epichlorohydrin polycondensate, acrylamide / diallylamine copolymer, polyvinylamine copolymer, and the like, or a mixture of two or more of these. it can. As the cationic resin in the present invention, a commercially available resin can be suitably used.

Specific examples of commercially available cationic resins in the form of an aqueous solution or aqueous dispersion include, for example, an aqueous solution such as Sunfix PRO-10 manufactured by Sanyo Chemical Industries, Ltd.
0 (polyamine-based aqueous solution), Sunfix 70 (dicyandiamide-based aqueous solution), Kachiogen L (quaternary ammonium salt aqueous solution) manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd., Sharol D
C-303P (polydimethyldiallylammonium chloride aqueous solution), Charol DC-902P (polydimethyldiallylammonium chloride aqueous solution), Epomin P-1000 (polyethyleneimine) manufactured by Nippon Shokubai Co., Ltd., PAA-HCI- manufactured by Nitto Boseki Co., Ltd. 3L (polyallylamine hydrochloride), PAA-HCI-10L (polyallylamine hydrochloride) and the like can be mentioned. Also,
Examples of the aqueous dispersion include Sunstat 1200 (a quaternary ammonium salt type) manufactured by Sanyo Kasei Kogyo Co., Ltd., Nikka Silicon AMZ (amino-modified silicon emulsion) manufactured by Nikka Chemical Co., Ltd., and Nikka Silicon AM-202 (amino-modified silicon). Emulsion), Nikka Silicon AMZ-3 (amino-modified silicone emulsion) and the like.

The proportion of the cationic resin in the form of the aqueous solution or aqueous dispersion used in the present invention is such that the resin content is 5 to 120 parts by mass with respect to 100 parts by mass of the vehicle containing a glycol solvent as a main component. It is necessary to mix it. If the amount is less than 5 parts by mass, the water resistance may not be improved. If the amount is more than 120 parts by mass, the water resistance is improved, but the printability is deteriorated.

The porous fine particles used in the present invention are not particularly limited, and hydrophilic porous fine particles, hydrophobic porous fine particles and a mixture thereof can be used. The amount of the porous fine particles used in the present invention is 5 to 60 parts by mass, preferably 10 to 10 parts by mass, based on 100 parts by mass of the vehicle.
It is desirable to add 50 parts by mass. If the amount is less than 5 parts by mass, water resistance and bleeding of a printed image may not be improved.
If it exceeds 0 parts by mass, there is a possibility that the suitability for printing ink may be deteriorated, and thus both are not preferred.

Specific examples of the porous fine particles used in the present invention include, for example, silica fine particles and hydrophobic fine particles.
(Nipsil SS-10F, S
S-15, SS-10A, SS-20, SS-30P,
SS-30S, SS-40, SS-50, SS-50
A, SS-60, SS-70, SS-100, SS-1
0F, SS-50F, SS-50B, SS-50C, S
S-72F, SS-170X, SS-178B etc.),
In the case of hydrophilic ones, Tokuyama Fine Seal A,
B, USF, E50, E70, T32, X12, X3
0, X37, X37B, X40, X45, X60, X7
0, X80, RX70, K41, F80, F80B, P
8, CMF, etc.), and further, porous fine particles such as titanium dioxide (Nippon Aerosil T805), alumina fine particles, natural zeolite, synthetic zeolite, calcium carbonate, activated clay, glass, and shirasu balloon.
These may be used alone or in combination of two or more.

In the present invention, a vehicle further containing a binder resin can be used if necessary. By further blending the binder resin, the formed inkjet ink receiving layer becomes stronger against abrasion,
Even if rubbed with an OCR reader or the like, it is preferable because the porous fine particles do not separate or the ink jet ink receiving layer does not peel off.

The binder resin used in the present invention is not particularly limited as long as it can be used together with the glycol solvent. Specifically, for example, albumin, gelatin, casein, starch, gum arabic, natural resins such as sodium alginate, carboxymethyl cellulose, cellulose derivatives such as hydroxyethyl cellulose, polyamide, polyacrylamide, polyhydroxyethyl methacrylate, polyphenylacetoacetal, Polyethylene imine, polyvinyl pyrrolidone, polyvinyl pyridium halide, melamine resin, polyurethane, polyvinyl alcohol and its derivatives, polyester, polyacrylic acid soda, synthetic resin such as acrylate copolymer, dimethylamine / epichlorohydrin polycondensate, acrylamide Diallylamine copolymer, polyvinylamine copolymer, dicyandiamide, dimethyl
Cationic resin such as a compound containing diallyl ammonium chloride as a main component or a mixture of two or more of these, electron beam curable ink, ultraviolet curable ink, sulfonic acid group, carboxyl group, sulfate group,
Anionic resins such as rosin-modified maleic acid having an anionic group such as a phosphate group can be exemplified.

Known additives can be added to the ink for forming an ink jet receiving layer of the present invention, if necessary. Examples of the additive include a viscosity adjuster, an antioxidant, a pH adjuster, an antifoaming agent, various stabilizers, a colorant, and a roll transferability improver such as glycerin.

The ink for forming an ink jet receiving layer of the present invention is applied to a predetermined portion of at least one surface of a substrate by a coating means such as a gravure coater, flexo, air knife coater, bar coater, etc. A recording sheet having the same can be formed. Therefore, in the present invention, no special drying device is required.

As the substrate used in the present invention, in addition to ordinary paper, synthetic paper or a synthetic film of polyethylene, transparent polyethylene terephthalate, polypropylene, vinyl chloride or the like can be used. When using these synthetic films, the surface of the substrate is preferably subjected to a surface treatment such as a mat treatment or a corona treatment. The coating amount of the ink on the substrate surface is not particularly limited, but is, for example, 0.5 to 30 g / m ² , preferably 3 to 20 g / m ² .
g / m ^2, further preferably 5 to 15 g / m ^2.

As the ink-jet ink used in the present invention, for example, JP-A-7-228808,
No. 7,228,809 can be used. In particular, at least one anionic selected from the group consisting of anthraquinone, benzoquinone, naphthoxyquinone, xanthene, triphenylmethane, quinoline, indigoid, azine, oxazine, thiazine and methine dyes Ink is preferably used. These specific examples are described in JP-A-7-2288.
No. 09, paragraph No. 0015. As a medium used for this ink, a mixed solvent of water and a water-soluble organic solvent can be used. In addition, a pH adjuster, a viscosity adjuster, a surface tension adjuster and the like can be contained.

FIG. 1 is an explanatory diagram illustrating an embodiment of the recording sheet of the present invention. In FIG. 1, a recording sheet 1 of the present invention has an ink-jet ink receiving layer 3 formed at a predetermined position on the upper surface of a substrate 2 using the ink for forming an ink-jet ink receiving layer of the present invention. Reference numeral 4 denotes printing printed on the inkjet ink receiving layer 3 by an inkjet printer (not shown).

[0025]

The present invention will be described in more detail with reference to the following Examples and Comparative Examples, but the present invention is not limited to these Examples. (Example 1) 5 parts by mass of rosin-modified maleic acid (trade name: Tespol 1152 (manufactured by Hitachi Chemical Co., Ltd.)) is dissolved in 95 parts by mass of propylene glycol. 20 parts by mass of synthetic hydrophilic silica fine particles (trade name: Nipsil E-200 (manufactured by Nippon Silica Industry Co., Ltd.)) are kneaded with 100 parts by mass of the obtained vehicle liquid. Subsequently, 20 parts by mass of synthetic hydrophobic silica fine particles (trade name: Nipsil SS-15 (manufactured by Nippon Silica Industry Co., Ltd.)) are kneaded. Further, a dicyandiamide-based cationic resin in the form of an aqueous solution as a water resistance improver (trade name: Sunfix 70 (resin content 52%))
(Manufactured by Sanyo Chemical Industries, Ltd.)> 38.5 parts by mass (20 parts by mass as resin). To this, 10 parts by mass of glycerin was added as a roll transferability improver, and a three-roll mill was used to prepare an ink for forming an inkjet receiving layer of the present invention. The obtained ink for forming an ink jet receiving layer of the present invention is subjected to offset printing on a high quality paper (70 kg continuous mass) using a resin relief plate so as to have a density of 1.5 g / m ² to have an ink jet ink receiving layer. A recording sheet of the present invention was made. After printing (black, red, blue, and green dye inks) on the inkjet ink receiving layer of the obtained recording sheet of the present invention with a Cytex inkjet printer, the water resistance and STI grade (% ) (Print quality) was evaluated. Table 1 shows the evaluation results.

(Evaluation method) <Water resistance> The printed portion is washed away with running water for a certain period of time, or a water droplet is dropped on the printed portion for a certain period of time, and then wiped off to visually determine the state of the ink. When the print completely remained, it was judged as ◎, when the print almost completely remained, as ○, when the print became slightly thinner, as Δ, and when the print became thinner, as ×.

<STI Grade (%) (Print Quality)> A bar code is printed by an ink jet printer, and the read quality is checked with a bar code tester (LASER CHEK).
In II), evaluation was made by measuring the STI grade (%). In general, STI grade 50
% Or more can be evaluated as standard good quality.

(Example 2) The ink jet receiving layer of the present invention was prepared in the same manner as in Example 1 except that the cationic resin used in Example 1 was changed to 19.2 parts by mass (10 parts by mass as a resin component). After preparing the forming ink, a recording sheet of the present invention having an ink jet ink receiving layer was prepared in the same manner, and the water resistance and the STI grade (%) (print quality) were evaluated. Table 1 shows the evaluation results.

Example 3 An ink jet receiving layer of the present invention was prepared in the same manner as in Example 1 except that the cationic resin used in Example 1 was changed to 57.7 parts by mass (30 parts by mass as a resin component). After preparing the forming ink, a recording sheet of the present invention having an ink jet ink receiving layer was prepared in the same manner, and the water resistance and the STI grade (%) (print quality) were evaluated. Table 1 shows the evaluation results.

Example 4 40 parts by mass of the cationic resin used in Example 1 (trade name: Sanfixus PRO-100 (resin content: 50%) (manufactured by Sanyo Chemical Industries, Ltd.)) (20 parts by mass as resin content) ) Was prepared in the same manner as in Example 1 except that the recording sheet of the present invention having an ink-jet ink-receiving layer was prepared in the same manner as in Example 1;
The I grade (%) (print quality) was evaluated. Table 1 shows the evaluation results.

(Example 5) 39.2 parts by mass of the cationic resin used in Example 1 (trade name: Sharol DC-902P (resin content 52%) (Daiichi Kogyo Seiyaku Co., Ltd.)) Example 1 except that the amount was changed to 20 parts by mass).
After preparing the ink for forming an ink-jet receiving layer of the present invention in the same manner as described above, a recording sheet of the present invention having an ink-jet ink-receiving layer is similarly prepared, and the water resistance and STI grade (%) (print quality) are obtained. An evaluation was performed.
Table 1 shows the evaluation results.

Comparative Example 1 An ink for forming an ink-jet receiving layer for comparison was prepared in the same manner as in Example 1 except that the cationic resin used in Example 1 was not added. Make recording sheet with layer, water resistance and STI grade (%)
(Print quality) was evaluated. Table 1 shows the evaluation results.

Comparative Example 2 The procedure of Example 1 was repeated except that the cationic resin used in Example 1 was not added and the synthetic hydrophilic silica fine particles were changed to alumina fine particles (trade name: aluminum oxide (manufactured by Nippon Aerosil Co., Ltd.)). After preparing an inkjet receiving layer forming ink for comparison in the same manner as in 1,
Similarly, a recording sheet having an inkjet ink receiving layer was prepared, and the water resistance and STI grade (%) (print quality) were evaluated. Table 1 shows the evaluation results.

Comparative Example 3 Synthetic hydrophilic silica fine particles (trade name: Nipsil E-200 (manufactured by Nippon Silica Industry Co., Ltd.)) 24 parts by mass and a dicyandiamide-based cationic resin as a water resistance improver (trade name: Sunfixus 70)
(Resin content: 52%) (manufactured by Sanyo Chemical Industries, Ltd.)> 23.1 parts by mass (12 parts by mass as resin portion) of UV varnish <trade name: Silver varnish (manufactured by T & K TOKA)> Kneading was performed using this roll mill to obtain an ink for forming an inkjet ink receiving layer for comparison. Using a resin letterpress, the obtained ink for forming an ink-jet ink receiving layer was coated on a high-quality paper (70 kg continuous weight) at 1.5 g /
Dry offset printing (curing with a high-pressure mercury lamp) was performed so as to obtain m ^2, and a recording sheet for comparison was prepared. Printing (black, red, blue, and green dye inks) was performed on the inkjet receiving layer of the obtained recording sheet with an inkjet printer manufactured by Cytex Corporation, and water resistance and STI grade (%) (print quality) were obtained in the same manner as in Example 1. ) Was evaluated. Table 1 shows the evaluation results.

Comparative Example 4 60 parts by mass of a rosin-modified phenolic resin varnish and 11 parts by mass of linseed oil varnish were mixed.
6 parts by mass of wood wax (baltimic acid glyceride) and 3 parts by mass of a dryer were mixed. The resulting varnish contains 25 parts by mass of synthetic hydrophilic silica fine particles (trade name: Nipsil E-200 (manufactured by Nippon Silica Industry Co., Ltd.)) and a dicyandiamide-based cationic resin as a water resistance improver (trade name: Sunfixus 70 (resin content 52) %) (Manufactured by Sanyo Chemical Industries)> 2
4 parts by mass (12.5 parts by mass as the resin component) were added, and an ink for forming an inkjet ink receiving layer for comparison was prepared using a three-roll mill. The obtained ink was applied to high quality paper (70 kg continuous weight) using a resin relief printing plate.
Dry offset printing was performed at 5 g / m ² to prepare a recording sheet for comparison. After printing (black, red, blue, and green dye inks) on the inkjet ink receiving layer of the obtained recording sheet using an inkjet printer manufactured by Cytex Corporation, water resistance and STI grade (%) were obtained in the same manner as in Example 1. (Print quality) was evaluated.
Table 1 shows the evaluation results.

[0036]

[Table 1]

The inks for forming the ink-jet receiving layer of Examples 1 to 5 are excellent in printing ink suitability and, as shown in Table 1, the water resistance and STI of the prints (black, red, blue and green dye inks) printed by the ink-jet printer. grade(%)
(Print quality) is excellent. On the other hand,
The inks for forming the ink-jet ink receiving layer of Comparative Examples 1 to 4 had water resistance and STI grade (%) (print quality).
Inferior.

[0038]

The ink for forming an ink-jet receiving layer according to the first aspect of the present invention solves the problems of the conventional ink for forming an ink-jet receiving layer and can be used with a vehicle containing a specific glycol-based solvent as a main component. Therefore, it is an ink containing a specific amount of a cationic resin and a porous fine particle in the form of an aqueous solution or aqueous dispersion, so that it does not require a special drying device, exhibits high ink absorbency, and has an ink jet formed on a substrate. Excellent water resistance of the inkjet ink printed on the ink receiving layer, no bleeding of the printed image, high print quality of the print, and excellent print ink suitability, so that the ink can be easily inkjetted only at the required place on the base material. Since the ink receiving layer can be formed, the cost can be reduced and the remarkable effect of not affecting the offset printing can be obtained. To.

The ink for forming an ink jet receiving layer according to the second aspect of the present invention is formed on a base material because a vehicle further containing a binder resin is used in the ink for forming an ink jet receiving layer according to the first aspect. The ink-jet ink receiving layer becomes resistant to rubbing, and even if rubbed with an OCR reader or the like, inorganic porous fine particles are detached,
This has a remarkable effect that the inkjet ink receiving layer does not peel off.

According to a third aspect of the present invention, there is provided a recording sheet formed by using the ink for forming an inkjet receiving layer according to the first or second aspect on a predetermined portion of at least one surface of a substrate. With layers
The ink has high ink absorbency, has excellent water resistance of the inkjet ink printed on the inkjet ink receiving layer, does not cause bleeding of a printed image, and has a remarkable effect of high printing quality.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating an embodiment of a recording sheet of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Recording sheet of this invention 2 Substrate 3 Ink jet ink receiving layer 4 Printing

Claims (3)

[Claims] 1. A resin containing a cationic resin in the form of an aqueous solution or an aqueous dispersion in an amount of 5 to 120 parts by mass based on 100 parts by mass of a vehicle containing a glycol solvent having a boiling point of 100 ° C. or higher as a main component. 5-6 fine particles
An ink for forming an inkjet receptive layer, wherein 0 parts by mass are blended. 2. The ink for forming an ink jet receiving layer according to claim 1, wherein a vehicle further containing a binder resin is used. 3. A recording sheet having an ink-jet ink receiving layer formed by using the ink for forming an ink-jet receiving layer according to claim 1 or 2 on a predetermined portion of at least one surface of a substrate.