JPH10329405A - Inkjet recording sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain good recording characteristics even in both of water soluble dye and water pigment ink by preparing anionic fluorine interfacial active agent containing a polymer with a compound having a perfluoroalkyl group in the hydrophobic portion and having an ethylene oxide polymer and anionic functional group in the hydrophilic portion. SOLUTION: By blending anionic fluorine interfacial active agent composed of a polymer with a compound having perfluoroalkyl group in the hydrophobic portion and ethylene oxide polymer and anionic functional group in the hydrophilic portion in an ink receptacle layer, good recording properties can be obtained even in both of water soluble dye and water pigment ink. Herein, such a compound having an anionic functional group can be reacted directly and indirectly with an OH group of ethylenic oxide and, in addition, it has a functional group such as a carboxylic group or sulfonic group or salt thereof after reaction, thereby representing an anionic property of fluorine interfacial active agent itself. Thus, it has an excellent transparency and glossiness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet for ink-jet recording, which is excellent in ink-jet recording suitability, and particularly excellent in gloss and transparency of an ink receiving layer. The present invention relates to an inkjet recording sheet suitable for a transparent inkjet recording sheet.

[0002]

2. Description of the Related Art Recording by an ink-jet printer is used in various fields because of low noise, high-speed recording, and easy multi-color printing. by the way,
In recent years, with the expansion of applications such as high-speed inkjet recording, higher definition of recorded images, and full-color printing, higher gloss, higher image quality, and higher recording density have been demanded. Gloss and recording quality comparable to paper are required. Further, there is an increasing demand for optically transparent recording media for OHP, for signboards, for show windows, and the like. In general, as ink jet recording paper, high-quality paper devised to be rich in ink absorbency, coated paper having a surface coated with a porous pigment, and the like are applied. However, these papers are all mainly so-called matte-tone ink jet recording papers having low surface gloss. Further, all the above-mentioned papers are opaque, and even if a transparent support is applied, the coating layer is opaque, so that a sheet having sufficient transparency cannot be obtained.

In order to obtain a transparent or glossy ink jet recording sheet, JP-A-59-1743 has been proposed.
No. 81, Japanese Unexamined Patent Application Publication No. 60-92849, Japanese Unexamined Patent Application Publication No.
JP-A-132785, JP-A-60-145879, JP-A-60-220750, JP-A-60-200
JP-A-224578 and JP-A-61-32788 propose that an ink receiving layer made of a hydrophilic polymer resin such as starch, a water-soluble cellulose derivative, polyvinyl alcohol, and polyvinylpyrrolidone is provided on a plastic film. I have. By the way, conventionally, inks used in ink jet recording systems have been used for water-soluble dyes such as direct dyes and acid dyes, which have excellent color developability and have little clogging at an ink discharge portion. Water-based pigment inks have been developed for the purpose of improving the water resistance and light resistance of the ink. However, a recording sheet provided with an ink receiving layer of a hydrophilic polymer resin as described above has a low print density when printed with pigment ink,
There is a problem that unevenness occurs.

[0004]

SUMMARY OF THE INVENTION The present invention provides an ink jet recording sheet which is excellent in ink jet recording suitability and excellent in transparency or gloss in both water-soluble dyes and water-based pigment inks.

[0005]

The present invention includes the following aspects. [1] In an ink jet recording sheet provided with an ink receiving layer containing a hydrophilic polymer resin and a surfactant on a support, the hydrophobic part of the surfactant contains a perfluoroalkyl group and the hydrophilic part contains ethylene oxide. An ink jet recording sheet comprising an anionic fluorine-based surfactant having a polymer of a polymer and a compound having an anionic functional group.

[2] The anionic fluorosurfactant comprises:
A surfactant represented by the following general formula (1) [1]
Sheet for inkjet recording. PfB (C_TwoH_FourO) n-R (-) (1) [Pf is a perfluoroalkyl group, B is CON (X¹)
 , CO_Two, SO_TwoN (X ^Two), N (X^Three), O, CH
_TwoO, C₆H_FourO etc. are shown. Where X¹, X^Two, X^Three
Represents H or a lower alkyl group, respectively. n = 2 to 2
Indicates 0. R (-) is a compound having an anionic functional group
Is shown. ]

[3] The ink jet recording sheet according to [1] or [2], wherein the hydrophilic polymer resin contains at least one of partially saponified polyvinyl alcohol and polyvinylpyrrolidone. [4] An inkjet recording method for forming a recorded image by applying a pigment ink droplet to the inkjet recording sheet according to any one of [1] to [3].

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present inventors have re-evaluated various commonly-known hydrophilic polymers as materials for an ink-jet ink receiving layer. As a result, it was confirmed that partially saponified polyvinyl alcohol, polyvinylpyrrolidone, and the like were excellent in terms of the coloring property of the aqueous dye ink when recorded by an inkjet printer and the drying property of the ink. However, although the recording sheet in which the ink receiving layer is formed using the above partially saponified polyvinyl alcohol or polyvinylpyrrolidone has excellent printability with a conventional dye ink, there is a problem in printability with an aqueous pigment ink. I understood that. That is, the ink is repelled on the surface of the ink receiving layer, the print density is low, and the uniformity of the solid print portion is poor. Therefore, the present inventors have intensively studied a method for improving the above-mentioned problem. As a result, by blending an anionic fluorinated surfactant in which the hydrophobic part is composed of a perfluoroalkyl group and the hydrophilic part is composed of a polymer of an ethylene oxide polymer and a compound having an anionic functional group in the ink receiving layer. The inventors have found that the above problems can be effectively solved, and have completed the present invention.

Among the above-mentioned fluorosurfactants, one of the following
Those of the general formula (1) are preferred. PfB (C_TwoH_FourO) n-R (-) (1) [Pf is a perfluoroalkyl group, B is CON (X¹)
 , CO_Two, SO_TwoN (X ^Two), N (X^Three), O, CH
_TwoO, C₆H_FourO etc. are shown. Where X¹, X^Two, X^Three
Represents H or a lower alkyl group, respectively. n is 2 to 2
Indicates an integer of 0. R (-) is a compound having an anionic functional group
Show compound. Here, the compound having an anionic functional group is ethylene.
It can react directly or indirectly with the OH group of the oxide.
After the reaction, the carboxyl group and sulfone group
Because it has a functional group or its salt, it has fluorine surface activity
The agent itself exhibits anionicity. The above-mentioned anionic officer
The compound having a functional group is not particularly limited.
But not fatty acid chlorides such as monochloroacetic acid
Examples thereof include dicarboxylic acids, sulfuric acid, and chlorosulfuric acid.

The reason why the above-mentioned effects can be obtained by the present invention is not specifically known, but is presumed as follows. As an inkjet ink using a water-based pigment ink, one using a water-soluble polymer dispersing material as a specific water-soluble solvent is disclosed in Japanese Patent Application Laid-Open No. 8-142495, and the pigment has a size of several μm to several μm. It has a particle size and exists as a dispersion in the ink. When a recording sheet having an ink receiving layer made of a hydrophilic polymer resin is printed by inkjet printing, the water-soluble dye is taken into the receiving layer together with the ink solvent, whereas the water-based pigment ink contains the ink solvent in the receiving layer. Although incorporated, the pigment is fixed on the surface of the receiving layer without penetrating into the receiving layer due to its particle size. For this reason, it is more difficult to control dots with pigment ink than with dye ink. The fluorine-based surfactant used in the present invention has a function of finely controlling the permeability of the water-based pigment ink, the wettability on the surface of the receiving layer, and the like, so that the pigment forms an appropriate dot on the surface of the receiving layer. It is estimated to be.

The partially saponified polyvinyl alcohol preferably used in the present invention is not particularly limited, and generally commercially available polyvinyl alcohol can be used. However, the degree of saponification is 50 to 50 from the viewpoint of inkjet recording suitability.
90% is preferred, more preferably 65-85%. By the way, when the saponification degree is low, the solubility in water is reduced and the addition of alcohols is required, which may be disadvantageous in terms of safety and ease of handling, and there is a possibility that the ink drying property and image quality may also be reduced. . On the other hand, when the degree of saponification is high, the ink drying property and image quality may similarly decrease, and further, the crystallization of polyvinyl alcohol may easily progress with time, and the ink drying property and image quality may further decrease. .
Further, the degree of polymerization of the partially saponified polyvinyl alcohol is not particularly limited, but the degree of polymerization is preferably 200 to 3000 in terms of printing quality such as ink drying property and image quality and water resistance of the ink receiving layer. Preferably 300 to
2500. If the degree of polymerization is low, the water resistance of the ink receiving layer may be poor or the ink drying property may be reduced. In addition, even if the degree of polymerization is high, there is a possibility that the ink absorbency may be reduced, the viscosity may be increased, and it may be difficult to handle and workability may be reduced.

As the polyvinylpyrrolidone preferably used in the present invention, commercially available polyvinylpyrrolidone can be used, and it is not particularly limited, but the printing quality such as ink drying property and image quality and the water resistance of the ink receiving layer are not particularly limited. In this respect, the average molecular weight is preferably about 100,000 to 1,000,000.

As the hydrophilic polymer resin constituting the ink receiving layer of the present invention, a hydrophilic polymer resin other than the above-mentioned partially saponified polyvinyl alcohol or polyvinylpyrrolidone can be used, and specific examples thereof are as follows. . For example, fully saponified polyvinyl alcohol, various modified polyvinyl alcohols, various modified polyvinyl pyrrolidone, casein, starch, starch derivatives, water-soluble cellulose derivatives, polyacrylic acid, metal salts of polyacrylic acid, polyacrylamide, polyethylene oxide, polyethylene glycol, polyvinyl methyl ether And resin emulsions such as water-soluble resins such as polyvinyl acetal and gelatin, acrylic resins, urethane resins, polyester resins, and vinyl acetate resins, and various latexes. Of these, water-soluble resins are preferred, and partially saponified polyvinyl alcohol and polyvinylpyrrolidone are particularly preferred.

The mixing ratio of the hydrophilic polymer resin and the fluorine-based surfactant is preferably adjusted to 0.01 to 10 parts by weight of the fluorine-based surfactant based on 100 parts by weight of the hydrophilic polymer resin. More preferably, it is 0.1 to 5 parts by weight. If the amount is small, it is difficult to obtain the desired effect, and if it is large, the print quality such as image quality may be deteriorated. In order to impart water resistance to the ink receiving layer, a generally known water resistance agent can be added. Examples of such a waterproofing agent include aldehyde compounds, melamine compounds, epoxy compounds, urea resins, isocyanates, and polyethyleneimine compounds. Further, when a cationic polymer is used in combination with the above-mentioned water-proofing agent, it is easy to balance printing quality and water-proofing, which is a particularly preferable embodiment. Here, as the cationic polymer, chitin, chitosan, acrylamide-based polymer, diallylamine-based polymer and the like are preferable.

Various inorganic and organic pigments and particles can be added to the ink receiving layer for the purpose of preventing the recording sheet from being tacky or blocking. Examples of inorganic pigments include silica, clay, talc, calcium carbonate, aluminum silicate, zeolite, and alumina.Examples of organic pigments and particles include various plastic particles such as styrene resin, acrylic resin, and urethane resin, and cellulose. Examples include fine powder and starch particles. Various types of dispersants, thickeners, defoamers, wetting agents, fluorescent agents, coloring agents, antistatic agents, preservatives, ultraviolet absorbers and the like are included in the coating composition constituting the ink receiving layer of the present invention. Auxiliaries are added as needed.

The support used in the present invention is not particularly limited. For the purpose of obtaining a high gloss type sheet, papers such as high quality paper, medium quality paper, coated paper, art paper, cast coated paper, synthetic paper, white film, laminated paper and the like can be used. In this case, since the ink receiving layer according to the present invention is transparent and has less irregular reflection of light on the surface, an ink jet recording paper having a high print density and excellent gloss can be obtained. In order to express gloss more effectively, a base material having a high barrier property to the aqueous composition of the ink receiving layer is preferable, and a pigment such as titanium oxide or barium sulfate is blended or made opaque to obtain a opaque white color. So-called laminated paper obtained by laminating a thermoplastic resin such as polyethylene terephthalate, polyvinyl chloride, polycarbonate, polyimide, polyacetate, polyethylene, polypropylene, polystyrene and other white opaque plastic films, and further, a paper base material is preferably used. is there. In the case of laminated paper, it is necessary to provide a laminate layer at least on the side on which the ink receiving layer is provided. By adding a fluorescent whitening agent, the apparent whiteness and hue can be adjusted. Also, a curl can be adjusted by providing a laminate layer on the back surface. Since the ink receiving layer according to the present invention is transparent,
When a transparent support is used, it is suitable as a light-transmitting recording medium such as an OHP sheet. Examples of such a transparent substrate include plastic films such as polyethylene terephthalate, polyvinyl chloride, polycarbonate, polyimide, polyacetate, polyethylene, polypropylene, and polystyrene. The thickness of the support is not particularly limited, but is preferably about 25 to 500 μm, more preferably about 50 to 300 μm from the viewpoint of ease of handling and cost.

The coating composition for an ink receiving layer composed of the above-mentioned materials is generally adjusted to a solid concentration of about 5 to 20% by weight, and a bar coater, a blade coater, an air knife coater, a roll coater is provided on a support. , A gravure coater, a curtain coater, a die coater, etc., and coating and drying. The coating amount is 1 to 50 g / m ² , more preferably 3 to 30 g in dry weight.
/ M ² . If the amount is less than 1 g / m ² , the ink absorption tends to be insufficient, and the ink tends to bleed or dry slowly. If it exceeds 50 g / m ² , the effect obtained will be saturated, resulting in a disadvantage in terms of cost and the possibility of curling. In the above-mentioned coating, not only one coating but also several coatings can be performed. Further, in order to suppress the occurrence of curling, a curl preventing layer may be provided on the side of the substrate opposite to the surface on which the ink receiving layer is provided. The curl prevention layer in this case is not particularly limited, but it is considered that curl occurs due to the absorption and release of moisture of the ink receiving layer due to a change in humidity. Therefore, it is effective to use a material having a composition similar to that of the ink receiving layer. It is.

[0018]

The present invention will be described in more detail with reference to the following Examples, but it should be understood that the present invention is by no means restricted thereto.
Parts and% in Examples are parts by weight and% by weight, respectively, unless otherwise specified. The coating amount indicates a dry coating amount unless otherwise specified. Example 1 Softwood bleached kraft pulp (NBKP) in which CSF (JISP-8121) was beaten to 250 ml, and CSF was 2
Hardwood bleached kraft pulp (LBK up to 80 ml)
P) and a weight ratio of 2: 8, and a concentration of 0.5%
Was prepared. The following papermaking additives were dispersed in this pulp slurry by sufficiently stirring the added paper in the following amount based on the absolute pulp weight. Cationized starch 2.0%, alkyl ketene dimer 0.4%, anionized polyacrylamide resin 0.1%, polyamide polyamine epichlorohydrin resin 0.7%. The pulp slurry having the above composition is paper-made with a fourdrinier machine, passed through a drier, a size press, and a machine calendar to obtain a basis weight of 128 g /
A base paper having an m ² and a strength of 1.0 g / m ³ was produced. The size press liquid used in the size press step was a 2: 1 mixture of carboxyl-modified polyvinyl alcohol and sodium chloride.
, And the mixture was added to water, dissolved by heating, and adjusted to a concentration of 5%, and 25 cc of the 5% size press solution was applied to both sides of the paper. After performing corona discharge treatment on both sides of the base paper, the following polyolefin resin composition 1 mixed and dispersed with a Banbury mixer was applied to the felt side of the base paper so that the coating amount was 25 g / m ^2. The polyolefin resin composition 2 (resin composition for the back side) was coated on the wire side such that the coating amount was 25 g / m ² , and a melt extruder having a T-shaped die (melting temperature 320
C), and the surface was cooled and solidified by a cooling roll having a mirror surface to produce a sheet-like support. The antioxidant in the polyolefin resin composition 1 is for preventing the polyethylene from being oxidized in the melt extrusion step, and the ultramarine blue and the fluorescent whitening agent give the polyolefin resin-containing layer a bluish and apparent whiteness. This is to improve visual perception.

(Polyolefin resin composition 1) Long chain type low
Density polyethylene resin (density 0.926g / m^Three , Mel
Index 20 g / 10 min) 35 parts by weight, low density
Polyethylene resin (density 0.919g / m ^Three, Melt-in
Dex 2 g / 10 min) 50 parts by weight, anatase type diacid
15 parts by weight of titanium oxide (A-220; manufactured by Ishihara Sangyo)
0.1 parts by weight of zinc phosphate, antioxidant (Irgano
x1010; Ciba-Geigy) 0.03 parts by weight, ultramarine
(Blue mouth ultramarine No. 2000; manufactured by Daiichi Kasei) 0.09 weight
Part, optical brightener (UVITEXOB; Ciba-Geigy)
0.3 parts by weight. (Polyolefin resin composition 2) High density polyethylene tree
Fat (density 0.954g / m^Three , Melt index 20
g / 10 minutes) 65 parts by weight, low density polyethylene resin (dense
Degree 0.924g / m^Three , Melt index 4g / 10
Min) 35 parts by weight. Subsequently, the polyolefin resin group of the sheet-like support
On the side where the composition 1 was provided, the following coating solution for an ink receiving layer was
10 g / m dry weight^TwoWith a bar coater
Coated and dried.

(Coating liquid for ink receiving layer) 1. 100 parts by weight of a partially saponified polyvinyl alcohol (PVA505; manufactured by Kuraray, saponification degree: 73.5%, polymerization degree: 500) (10% aqueous solution, charged amount: 1000 parts by weight); Anionic fluorinated surfactant (MegaFac F-
2. 140 NK [hydrophobic part; perfluoroalkyl group, hydrophilic part; polymer of ethylene oxide polymer and carboxyl group-containing compound]; 1 part by weight from Dainippon Ink and Chemicals, 1 part by weight of an antiblocking agent (Ace A; manufactured by Oji Cornstarch-starch particles; particle diameter: 10 to 20 µm).

Example 2 The following coating liquid for an ink receiving layer was applied to one surface of the sheet-like support used in Example 1 by a die coater so as to have a dry weight of 10 g / m ² and dried. did. (Coating liquid for ink receiving layer) 1. 100 parts by weight of a partially saponified polyvinyl alcohol (PVA420; manufactured by Kuraray, saponification degree 79.5%, polymerization degree 2000) (10% aqueous solution, charged amount 1000 parts by weight); Anionic fluorinated surfactant (MegaFac F-
2. 140 NK; manufactured by Dainippon Ink and Chemicals) 0.5 part by weight, 1 part by weight of an antiblocking agent (Ace A; manufactured by Oji Cornstarch-starch particles; particle diameter: 10 to 20 µm).

Example 3 The following coating liquid for an ink receiving layer was applied to one surface of the sheet-like support used in Example 1 with a bar coater so that the dry weight was 10 g / m ² , and dried. did. (Coating liquid for ink receiving layer) 1. 100 parts by weight of a partially saponified polyvinyl alcohol (PVA505; manufactured by Kuraray, saponification degree 73.5%, polymerization degree 500) (10% aqueous solution, charged amount 1000 parts by weight); Glioxal (Gosenal P; Nippon Gosei) 0.
2. 5 parts by weight, 3. Chitosan (SA-50; manufactured by Takamatsu Yushi) 5 parts by weight; Anionic fluorinated surfactant (MegaFac F-
140NK; manufactured by Dainippon Ink and Chemicals) 1 part by weight, 1 part by weight of an antiblocking agent (Ace A; manufactured by Oji Cornstarch-starch particles; particle diameter: 10 to 20 µm).

Example 4 100 μm thick PET film (Melinex D35)
3; manufactured by ICI Japan), and the same coating liquid for an ink-receiving layer as in Example 3 was applied to a dry weight of 10 g / m ^{2 using} a bar coater and dried.

Example 5 PET film having a thickness of 100 μm (Melinex D35)
3; manufactured by ICI Japan), and a coating liquid for an ink receiving layer was applied by a bar coater to a dry weight of 10 g / m ² and dried. (Coating liquid for ink receiving layer) Polyvinylpyrrolidone (rubiscol K-90; B
1. ASF (molecular weight 1.2 million) 100 parts by weight (10% aqueous solution, charged amount 1000 parts by weight); Anionic fluorinated surfactant (MegaFac F-
2. 140 NK; manufactured by Dainippon Ink and Chemicals, Inc. 1.0 part by weight, 1 part by weight of an antiblocking agent (Ace A; manufactured by Oji Cornstarch-starch particles; particle diameter: 10 to 20 µm).

Comparative Example 1 The following coating liquid for an ink-receiving layer was coated on one surface of the sheet-like support used in Example 1 with a bar coater so as to have a dry weight of 10 g / m ² and dried. did. (Coating liquid for ink receiving layer) 1. 100 parts by weight of a partially saponified polyvinyl alcohol (PVA505; manufactured by Kuraray, saponification degree: 73.5%, polymerization degree: 500) (10% aqueous solution, charged amount: 1000 parts by weight); 1 part by weight of an antiblocking agent (Ace A; manufactured by Oji Cornstarch-starch particles; particle diameter: 10 to 20 µm). Comparative Example 2 On one surface of the sheet-like support used in Example 1, the following coating liquid for an ink receiving layer was applied by a bar coater so as to have a dry weight of 10 g / m ² and dried. (Coating liquid for ink receiving layer) 1. 100 parts by weight of a partially saponified polyvinyl alcohol (PVA505; manufactured by Kuraray, saponification degree 73.5%, polymerization degree 500) (10% aqueous solution, charged amount 1000 parts by weight); Nonionic fluorinated surfactant (MegaFac F-
144D [hydrophobic part; perfluoroalkyl group, hydrophilic part;
2. ethylene oxide polymer]; 1 part by weight, manufactured by Dainippon Ink and Chemicals, 1 part by weight of an antiblocking agent (Ace A; manufactured by Oji Cornstarch-starch particles; particle diameter: 10 to 20 µm).

Comparative Example 3 The following coating liquid for an ink receiving layer was applied to one surface of the sheet-like support used in Example 1 with a bar coater so as to have a dry weight of 10 g / m ² and dried. did. 1. 1. 100 parts by weight of a partially saponified polyvinyl alcohol (PVA505; manufactured by Kuraray, saponification degree 73.5%, polymerization degree 500) (10% aqueous solution, charged amount 1000 parts by weight); 2. 1 part by weight of anionic surfactant dialkyl sulfosuccinate (Neocol SWC; manufactured by Daiichi Kogyo Seiyaku) 1 part by weight of an antiblocking agent (Ace A; manufactured by Oji Cornstarch-starch particles; particle diameter: 10 to 20 µm).

Comparative Example 4 On one surface of the sheet-like support used in Example 5, a coating liquid for an ink receiving layer was applied so as to have a dry weight of 10 g / m ² .
Coating with a bar coater and drying. (Coating liquid for ink receiving layer) Polyvinylpyrrolidone (rubiscol K-90; B
1. ASF (molecular weight 1.2 million) 100 parts by weight (10% aqueous solution, charged amount 1000 parts by weight); 1 part by weight of an antiblocking agent (Ace A; manufactured by Oji Cornstarch-starch particles; particle diameter: 10 to 20 µm). Comparative Example 5 On one surface of the sheet-like support used in Example 5, a coating liquid for an ink receiving layer was applied so as to have a dry weight of 10 g / m ² .
Coating with a bar coater and drying. (Coating liquid for ink receiving layer) Carboxymethylcellulose Na salt (Cellogen 7
A; manufactured by Daiichi Kogyo) 100 parts by weight (10% aqueous solution, charge amount 1000 parts by weight); 1 part by weight of an antiblocking agent (Ace A; manufactured by Oji Cornstarch-starch particles; particle diameter: 10 to 20 µm). Comparative Example 6 One side of the sheet-like support used in Example 1 was directly printed.

Table 1 summarizes the suitability for ink jet recording of the ink jet recording paper thus obtained. In addition, about the said evaluation, evaluation was performed by the following methods. (Suitability for Inkjet Recording) Printing was performed using black ink (pigment ink) and color ink (dye ink) of an inkjet printer PICTY400 (manufactured by NEC Corporation). [Image quality (uniformity of solid printing portion)] The printing unevenness (shading unevenness) of the solid printing portion of each color was visually evaluated. ：: Good level with almost no printing unevenness. X: A level at which printing unevenness is somewhat noticeable and poses a practical problem. XX: A level at which printing unevenness is remarkable and becomes a serious problem in practical use. [Blank gloss] 75% of blank paper according to JIS-P8142
° Gloss was measured. [Haze (Haze)] The haze was measured using a reflectance / transmittance meter HR-100 (manufactured by Murakami Color Research Laboratory).

[0029]

[Table 1]

[0030]

According to the present invention, the water-soluble dye and the water-based pigment ink are excellent in ink jet recording suitability,
Provided is an ink jet recording sheet having excellent transparency and gloss.

Claims (3)

[Claims] 1. An ink jet recording sheet comprising a support and an ink receiving layer containing a hydrophilic polymer resin and a surfactant, wherein the hydrophobic portion of the surfactant contains a perfluoroalkyl group and the hydrophilic portion contains a perfluoroalkyl group. Is an anionic fluorinated surfactant having a polymer of an ethylene oxide polymer and a compound having an anionic functional group. 2. An anionic fluorinated surfactant comprising:
The surfactant according to claim 1, which is a surfactant represented by the general formula (1).
Sheet for inkjet recording. PfB (C_TwoH_FourO) n-R (-) (1) [Pf is a perfluoroalkyl group, B is CON (X¹)
 , CO_Two, SO_TwoN (X ^Two), N (X^Three), O, CH
_TwoO, C₆H_FourO is shown. Where X¹, X^Two, X^Three Haso
Each represents H or a lower alkyl group. n = 2-20
Show. R (-) represents a compound having an anionic functional group.
You. ] 3. The ink jet recording sheet according to claim 1, wherein the hydrophilic polymer resin contains at least one of partially saponified polyvinyl alcohol and polyvinyl pyrrolidone.