JP2008246985A - Method for manufacturing inkjet recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing an inkjet recording medium which has excellent image quality and slight curling tendency under high humidity conditions while maintaining high printing density and high ink absorbency. <P>SOLUTION: In the method for manufacturing the inkjet recording medium, dispersion liquid containing latex of 1 mass% to 10 mass% as a nonvolatile component and penetrant of 0.75 mass% to 2 mass% as a non-volatile component is impregnated and dried on the surface opposite to the recording surface of the inkjet recording medium so that the nonvolatile amount becomes not less than 1 g/m<SP>2</SP>, wherein the inkjet recording medium has a recording surface with a 60° mirror surface glossiness of not less than 20% regulated by JIS Z 8741 and comprises a paper support body having no continuous crack on the surface of the recording surface and having a thickness of not less than 100 μm. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for producing an ink jet recording medium having a good recording surface quality, and having low curling even under high humidity conditions while maintaining high printing density and high ink absorbability.

  In recent years, the technology of inkjet printers has advanced rapidly, and it has become possible to obtain print quality comparable to that of the conventional printing technology. As a result, the surface of the recording layer has glossiness for purposes such as posters, photographs, and print proofing. Specifically, the 60-degree specular gloss specified in JIS Z 8741 is about 20% or more. There is a need for some inkjet recording media.

  In order to obtain a recorded material having the same texture as that obtained by a conventionally used printing technique in the ink jet recording medium used for these purposes, it is necessary that the printing surface of the recording medium does not have a continuous crack. It is. As a technique for producing such a recording medium, one of polyvinyl alcohol and polyvinyl acetal is contained as a resin component in the ink receiving layer, and boric acid or borax is contained as a coagulant to suppress crack formation during drying. Thus, it has been proposed to obtain an ink jet recording medium having no cracks on the surface of the recording surface (see, for example, Patent Document 1). However, the present inventors have examined that recording media that do not have continuous cracks on the surface, including those produced by other techniques, exhibit significant curl under high humidity conditions such as a relative humidity of 80% or more. This hinders conveyance inside the printer.

  In order to solve such problems, it has been proposed to apply one or more of polyvinyl alcohol, starch, and methylcellulose under the ink receiving layer or on the side opposite to the ink receiving layer (for example, patents). Reference 2). However, when this technology is used, there is a problem that the ink absorbability deteriorates.

Furthermore, it has been proposed to provide a layer having a water vapor transmission rate of 2000 g / m ² · day or less made of an aqueous varnish or emulsion resin on the side opposite to the ink receiving layer (see, for example, Patent Document 3). However, according to a study by the present inventors, the recording medium manufactured by the present technology is effective for a recording medium having a continuous crack on the surface of the recording surface, but the recording medium does not have a continuous crack. It has been found that there is not enough effect on the significant curl that occurs in the media.
JP 2001-287442 A JP 2005-105443 A JP 2006-116848 A

  According to the present invention, it is possible to provide an ink jet recording medium that has a good recording surface quality, maintains high printing density and high ink absorbency, and generates less curl even under high humidity conditions.

As a result of examining the above-mentioned problems, the 60-degree specular gloss specified in JIS Z 8741 has a recording surface of 20% or more and has no continuous crack on the surface of the recording surface, and has a thickness of 100 μm or more. In the production of the ink jet recording medium comprising the paper support, the latex is present on the surface opposite to the recording surface, the latex is 1% by mass to 10% by mass and the penetrant is 0.75% by mass of the non-volatile content. It is a production method in which a dispersion liquid consisting of at least 2% by mass and less than 2% by mass is impregnated so as to have a non-volatile content of 1 g / m ² or more and then dried.

  As the latex, styrene-butadiene is preferable.

  As the penetrant, it is preferable to use one or more surfactants selected from acetylene glycol surfactants, alkylsulfosuccinic acid surfactants, and fluorine surfactants.

Further, it is more preferable that the liquid application amount of the impregnation liquid is 35 g / m ² or more.

  Furthermore, it is preferable to dry after impregnation so that the surface temperature of the opposite surface becomes 70 ° C. or higher.

  According to the present invention, it is possible to provide an ink jet recording medium that has a good recording surface quality, maintains high printing density and high ink absorbency, and is less curled even under high humidity conditions.

  In the present invention, impregnation means a processing method in which a liquid penetrates into the paper support. When this method is used, an independent layer having a film thickness of 0.5 μm or more is formed on the surface of the paper support. Never formed. On the other hand, coating is defined as a processing method in which most of the nonvolatile content in the liquid remains on the surface of the paper support, and an independent layer having a thickness of 0.5 μm or more is formed on the component. Distinguish from the invention.

  In the present invention, the dispersion impregnated on the surface opposite to the recording surface of the ink jet recording medium has a latex as a nonvolatile content of 1% by mass to 10% by mass and a penetrant as a nonvolatile content of 0.75% by mass or more. A liquid containing 2% by mass or less. In addition, various additives such as an antifoaming agent, a thickener, a color adjuster, a fluorescent brightening agent, an antioxidant, and an ultraviolet absorber can be added as necessary. By setting the total non-volatile content concentration of the dispersion to 10% by mass or less, the penetration of the dispersion into the paper support is improved, and a higher curling suppression effect is obtained.

When such a dispersion is impregnated on the opposite side of the recording surface and dried by applying hot air or infrared rays, the nonvolatile content of the dispersion can be distributed to a certain depth from the surface of the opposite surface. The amount of non-volatile component contained in the dispersion liquid is preferably the effect of reducing curling too little less, and a 1g / m ² ~20g / m ² since it exacerbates the ink absorbing large, 3 g / m ² More preferably, it is set to ˜8 g / m ² . Even when the amount of the non-volatile component is the same, by applying a large amount of a dispersion having a low non-volatile component concentration, the latex does not exist only on the opposite surface, but a certain depth from the surface of the opposite surface. Therefore, a higher curl suppression effect is obtained, which is preferable. Specifically, it is preferable that the amount of the dispersion applied is 35 g / m ² or more because a higher curl suppressing effect is obtained.

In the ink jet recording medium proposed in Patent Document 3, a liquid containing an emulsion resin is applied to the surface opposite to the recording surface, whereby an emulsion resin film is formed on the surface and the moisture permeability is 2000 g. It is characterized in that a layer of / m ² · day or less is formed. On the other hand, in the ink jet recording medium of the present invention, Patent Document 3 proposes that the resin in the latex is distributed to a certain depth from the surface of the opposite surface without forming a layer. It is greatly different from an ink jet recording medium, and in the present invention, a remarkable curl suppressing effect can be obtained regardless of the moisture permeability of the obtained recording medium.

  Further, the drying treatment after impregnation is preferably performed so that the surface temperature of the opposite surface becomes 70 ° C. or higher, so that a higher curl suppressing effect can be obtained.

  In the present invention, the penetrant contained in the dispersion is a higher fatty acid surfactant such as sodium laurate, sodium stearate, potassium oleate, sodium dodecylbenzenesulfonate, sodium dioctylsulfosuccinate, dodecylnaphthalenesulfone. Sulfonic acid surfactants such as sodium acid, sodium dodecyl diphenyl ether disulfonate, sulfate ester surfactants such as sodium lauryl sulfate, sodium polyoxyethylene lauryl ether sulfate, polyoxyethylene lauryl ether sodium phosphate, polyoxyethylene Phosphate ester surfactants such as sodium rylphenyl ether phosphate, betaine surfactants such as lauryl amide acetate betaine, lauryl aminoacetate betaine, polyoxye Ether surfactants such as lenlauryl ether, polyoxyethylene stearyl ether, polyoxyethylene lauryl phenyl ether, 4,7-polyethylene oxide-2,4,7,9-tetramethyl-5-decine, polyoxyethylene sorbitan Examples include ester ether surfactants such as monostearate, glycerol monostearate, and polyethylene glycol distearate. One of these may be used alone, or two or more may be used in combination. Good. Among these penetrants, sulfonic acid surfactants composed of alkylsulfosuccinic acid derivatives such as sodium dioctylsulfosuccinate and acetylene glycols such as 4,7-polyethylene oxide-2,4,7,9-tetramethyl-5-decyne Ether surfactants composed of derivatives and sodium perfluorobutylsulfonate, sodium perfluorolaurylsulfonate, sodium perfluorostearylcarboxylate, disodium N-perfluorooctanesulfonylglutamate, monoperfluorooctylethyl phosphate, etc. It is preferable to use a fluorosurfactant because the permeability of the dispersion liquid to the paper support is particularly high, and as a result, a high curl suppressing effect can be obtained.

  In the present invention, latex refers to an aqueous dispersion of polymer particles. The particle size of the polymer particles in the dispersion measured by the dynamic light scattering method is usually 30 to 1000 nm. Examples of the polymer constituting the latex in the present invention include an ethylene-vinyl acetate copolymer, a styrene-butadiene copolymer, an acrylonitrile-butadiene copolymer, a (meth) acrylic ester copolymer, and a styrene- (meth). Examples include acrylic ester copolymers, isoprene copolymers, chloroprene copolymers, urethane copolymers, etc. One of these may be used alone, or two or more may be used in combination. Also good. Of these latexes, use of a styrene-butadiene copolymer is preferable because a particularly high curl suppression effect can be obtained.

  In the present invention, the method of impregnating the paper support with the dispersion is not particularly limited, and is a dip coater, air knife coater, blade coater, rod blade coater, bar coater, reverse roll coater, comma coater, gate roll coater, film transfer coater. Various coating apparatuses such as a lip coater, a die coater, and a curtain coater can be used. Although these coating apparatuses are apparatuses normally used for coating, they can be used for impregnation when a liquid having a very high permeability such as the dispersion liquid used in the present invention is applied.

  The configuration of the recording surface on which the present invention is effective is not particularly limited, and a recording surface having a 60 ° specular gloss of 20% or more as defined in JIS Z 8741 manufactured using a conventionally known one or other techniques is used. In any of the ink jet recording media comprising a paper support having a thickness of 100 μm or more and having no continuous crack on the surface of the recording surface, the present invention may hinder use even under high humidity. It is possible to suppress the occurrence of curling.

  Examples of the present invention will be described below. In the examples, unless otherwise specified, parts are parts by mass, and% is mass%.

[Example 1]
[Preparation of Dispersion 1]
Add 1 part of alkylsulfosuccinic acid surfactant (Perox OT-P manufactured by Kao Co., Ltd.) as a non-volatile component to 50 parts of water and mix, and then non-volatile latex of acrylate copolymer (Nipol LX814 manufactured by Nippon Zeon Co., Ltd.) 5 parts were added and mixed as a minute, and finally water was added to adjust the non-volatile content to 6% to obtain dispersion 1.

[Preparation of Ink Receiving Layer Coating Composition 1]
6 parts of sodium tetraborate decahydrate (0.97 parts in terms of H ₃ BO ₃ ) was dissolved in 350 parts of water, and 100 parts of wet synthetic silica (Fine Seal X-37B manufactured by Tokuyama Corporation) was added thereto. It was fully dispersed using a disperser having a post-saw blade. Next, 30 parts of acrylonitrile-butadiene copolymer (Nipol 1001 manufactured by Nippon Zeon Co., Ltd.) was added as a non-volatile component and mixed to obtain an ink receiving layer coating composition 1.

[Preparation of Alumina Hydrate Sol]
Mix 299 parts of water with 1 part of acetic acid, add 100 parts of alumina hydrate having a pseudo-boehmite structure (Dispersal HP14 manufactured by Sasol Co., Ltd.), stir for 2 hours as it is, and peptize to obtain an alumina having a nonvolatile content of 25%. A hydrated sol was obtained.

[Preparation of Glossy Layer Coating Composition 1]
Nonvolatile content of the above-mentioned alumina hydrate equivalent to 25 parts was obtained by adding 10% aqueous solution of polyvinyl alcohol (PVA235 manufactured by Kuraray Co., Ltd.) having a saponification degree of 88 mol% and a 4% aqueous solution having a viscosity of 95 mPa · s at 25 ° C. A glossy layer coating composition 1 was prepared.

[Preparation of inkjet recording medium]
Impregnating the dispersion liquid 1 on a base paper (Diafoam made by Mitsubishi Paper Industries Co., Ltd.) having a basis weight of 128 g / m ² and a thickness of 154 μm using a dip coater so that the non-volatile mass after drying becomes 4 g / m ^2. After application amount 66.7 g / m ² ), it was dried using a hot air dryer so that the surface temperature of the impregnated surface was 90 ° C. Thereafter, the ink receiving layer coating composition 1 is applied to the side opposite to the surface impregnated with the dispersion 1 using an air knife coater so that the coating amount after drying is 20 g / m ^2. It dried using the dryer. Next, the glossy layer coating composition 1 was coated using an air knife coater so that the coating amount after drying was 20 g / m ² , dried using a hot air dryer, and the inkjet of Example 1 A recording medium was produced.

[Preparation of Dispersion 2]
Dispersion 2 was obtained in the same manner as Dispersion 1, except that an acrylonitrile-butadiene copolymer latex (Nipol 1577, manufactured by Nippon Zeon Co., Ltd.) was used instead of the acrylate copolymer latex.

[Preparation of Dispersion 3]
Dispersion 3 was obtained in the same manner as Dispersion 1, except that styrene-butadiene copolymer latex (Nalstar SR-104, manufactured by Nippon A & L Co., Ltd.) was used instead of the acrylic ester copolymer latex. .

[Preparation of Dispersion 4]
Dispersion 4 was obtained in the same manner as Dispersion 3, except that an acetylene glycol surfactant (Orphine E1010 manufactured by Nissin Chemical Industry Co., Ltd.) was used as the penetrant instead of the alkylsulfosuccinic acid surfactant.

[Preparation of Dispersion 5]
Dispersion 5 was obtained in the same manner as Dispersion 3, except that a fluorosurfactant (Megafac F-443 manufactured by Dainippon Ink Co., Ltd.) was used as the penetrant instead of the alkylsulfosuccinate surfactant.

[Preparation of Dispersion 6]
Instead of 1 part of alkylsulfosuccinic acid surfactant as penetrant, 2 parts of higher fatty acid surfactant (Latemul AD-25 manufactured by Kao Co., Ltd.) is used as a non-volatile component, and finally the amount of water added is 7 Dispersion 6 was obtained in the same manner as Dispersion 3, except that the ratio was changed to%.

[Preparation of Dispersion 7]
Dispersion 7 was obtained in the same manner as dispersion 4, except that the amount of latex added was 3 parts as the nonvolatile content, and the amount of water added last was 4% in the nonvolatile content.

[Examples 2 to 6]
Except that the dispersion was changed as shown in Table 1, ink jet recording media of Examples 2 to 6 were produced in the same manner as in Example 1.

[Example 7]
An ink jet recording medium of Example 7 was produced in the same manner as in Example 4 except that the amount of the impregnated dispersion was changed to 1.5 g / m ² as a nonvolatile content (25 g / m ² as a liquid).

[Example 8]
The amount of dispersion impregnated to thereby produce an inkjet-recording medium of 1.1 g / m ² carried in was changed to (18.3 g / m ² as a liquid) in the same manner as in Example 4 Example 8 as a non-volatile content.

[Example 9]
Inkjet recording of Example 9 was carried out in the same manner as Example 7 except that the dispersion liquid 7 was used instead of the dispersion liquid 4 as the impregnating dispersion liquid and the same amount (37.5 g / m ² as the liquid) was given as the nonvolatile content. A medium was made.

[Example 10]
An ink jet recording medium of Example 10 was produced in the same manner as in Example 4 except that the surface temperature of the impregnated surface after impregnation and drying with the dispersion was 60 ° C.

[Example 11]
[Preparation of inkjet recording medium]
On the base paper, the dispersion 4 is impregnated using a dip coater so that the non-volatile content after drying is 4 g / m ^2, and a hot air dryer is used so that the surface temperature of the impregnated surface becomes 90 ° C. And dried. Thereafter, the ink receiving layer coating composition 1 is applied to the side opposite to the impregnated surface using an air knife coater so that the coating amount after drying is 20 g / m ^2, and a hot air dryer is used. And dried. Subsequently, after processing the obtained coated paper using a soft calender, the glossy layer coating composition 1 was coated using an air knife coater so that the coating amount after drying was 20 g / m ^2. Then, it was dried using a hot air dryer. Furthermore, the obtained coated paper was processed using a soft calendar. The coated surface of this coated paper is wetted by contact with water for 5 seconds, and then pressure-bonded to a mirror surface chrome plating cylinder of a casting apparatus heated to a temperature of 95 ° C. at a linear pressure of 20 kN / m and a speed of 20 m / min, and then dried. The ink jet recording medium of Example 11 was produced by peeling from the cylinder later.

[Preparation of Dispersion 8]
Dispersion 8 was obtained in the same manner as Dispersion 4 except that the amount of penetrant added was 0.3 parts as the nonvolatile content, and the amount of water added last was 5.3%. .

[Preparation of Dispersion 9]
Same as Dispersion 4 except that the penetrant addition was 5 parts non-volatile, the latex addition was 20 parts non-volatile, and the final amount of water added was 25% non-volatile. Thus, a dispersion 9 was obtained.

[Preparation of Dispersion 10]
The amount of penetrant added is 0.75 part as a nonvolatile content, the amount of latex added is 0.5 part as a nonvolatile content, and the amount of water added last is 1.25% nonvolatile content. Dispersion 10 was obtained in the same manner as dispersion 4.

[Preparation of Dispersion 11]
The amount of penetrant added is 5 parts as a non-volatile component, and 20 parts of latex of the acrylate copolymer of Example 1 is used as a non-volatile component in place of the styrene-butadiene copolymer latex as a latex. Dispersion 11 was obtained in the same manner as Dispersion 5, except that the nonvolatile content was 25%.

[Preparation of Dispersion 12]
Dispersion liquid except that the amount of penetrant added is 0.5 parts as non-volatile content, the amount of latex added is 5 parts as non-volatile content, and the amount of water added last is 5.5% non-volatile content. In the same manner as in Example 11, a dispersion 12 was obtained.

[Preparation of Dispersion 13]
Dispersion liquid except that the amount of penetrant added is 0.5 part as non-volatile content, the amount of latex added is 20 parts as non-volatile content, and the amount of water added last is 20.5% non-volatile content. In the same manner as in Example 11, a dispersion 13 was obtained.

[Comparative Example 1]
An inkjet recording medium of Comparative Example 1 was produced in the same manner as in Example 1 except that the dispersion was changed from Dispersion 1 to Dispersion 8.

[Comparative Example 2]
Comparative Example 1 was used in the same manner as Comparative Example 1 except that the dispersion 9 was used instead of the dispersion 8 and the amount of the impregnated dispersion was changed to the same amount (16 g / m ² as the liquid) as the non-volatile content. 2 inkjet recording media were produced.

[Comparative Example 3]
As in Comparative Example 1, except that Dispersion 10 was used instead of Dispersion 8 and the amount of the impregnated dispersion was changed to 0.75 g / m ² (60 g / m ² as liquid) as the non-volatile content. Thus, an inkjet recording medium of Comparative Example 3 was produced.

[Comparative Example 4]
Comparative Example 1 was used in the same manner as Comparative Example 1 except that Dispersion 11 was used instead of Dispersion 8 and the amount of the impregnated dispersion was changed to the same amount (16 g / m ² as the liquid) as the non-volatile content. 4 inkjet recording media were produced.

[Comparative Example 5]
In the same manner as in Comparative Example 1, except that the dispersion 12 was used instead of the dispersion 8 and the amount of the impregnated dispersion was changed to the same amount (72.7 g / m ² as the liquid) as the non-volatile content. An inkjet recording medium of Comparative Example 5 was produced.

[Comparative Example 6]
As in Comparative Example 1, except that Dispersion 13 was used instead of Dispersion 8, and the amount of the impregnated dispersion was changed to 10 g / m ² as a nonvolatile content (48.7 g / m ² as a liquid). Thus, an inkjet recording medium of Comparative Example 6 was produced.

[Comparative Example 7]
An inkjet recording medium of Comparative Example 7 was produced in the same manner as in Example 1 except that the dispersion 1 was not impregnated and dried.

[Preparation of Ink Receiving Layer Coating Composition 2]
2 parts of sodium hydroxide was dissolved in 350 parts of water, 100 parts of wet synthetic silica (Fukuseal X-37B manufactured by Tokuyama Co., Ltd.) was added thereto, and then sufficiently dispersed using a disperser having a saw blade. Next, 30 parts of acrylonitrile-butadiene copolymer (Nipol 1001 manufactured by Nippon Zeon Co., Ltd.) as a non-volatile component was added and mixed to obtain an ink receiving layer coating composition 2.

[Comparative Example 8]
Comparative Example 8 was prepared in the same manner as Comparative Example 7, except that the ink receiving layer coating composition was changed from the ink receiving layer coating composition 1 to the ink receiving layer coating composition 2. The dispersions are summarized in Table 2 below.

[Glossiness evaluation]
The 60-degree specular gloss was measured according to the method defined in JIS Z 8741.

[Evaluation of printing density]
A predetermined image was printed using a PM-900C type ink jet printer manufactured by Seiko Epson, and the optical reflection density of the black solid portion was measured with a Macbeth RD-918 reflection densitometer.

[Evaluation of ink absorbency]
A predetermined evaluation image was printed using a Seiko Epson PM-900C type ink jet printer, and the ink absorbability of each recording medium was classified into the following five stages based on the legibility of the details of the image. A (images can be clearly read in detail), B (images are slightly distorted but fully readable), C (original image is distorted by about 50%, but readable) D (although the original image is almost broken, it is barely readable), E (image is not readable at all).

[Evaluation of curls]
An inkjet recording medium cut to A4 size so that the paper fibers are oriented in the longitudinal direction is conditioned for 24 hours in a 23 ° C./50% RH environment, and then in a 15 ° C./15% RH environment. Then, the center of the short side of the A4 sheet was left for 12 hours with the clip suspended. Next, exposure was successively performed in an environment of 23 ° C./50% RH for 12 hours and in an environment of 30 ° C./80% RH for 12 hours. At each temperature and humidity, before changing to the next temperature and humidity, place the four corners on the horizontal plane in the direction of lifting, measure the height raised from each of the four corners, and average the values of the four corners The measured value of curl was used. The measured value is displayed as a positive value for curling toward the ink receiving layer and as a negative value for curling toward the opposite side. The larger the difference between the maximum value and the minimum value of the measurement values obtained under each environmental condition, the greater the movement of the curl, and the curl is judged to be severe.

[Observation of cracks on the recording surface]
The surface of the ink jet recording medium was observed with an optical microscope, and was classified into the following five stages according to the number of cracks observed in the visual field (0.0314 mm ² ) and their continuity. A (no cracks at all), B (no more than 30 independent cracks are generated), C (30 or more cracks are generated but all are independent), D (30 or more) Cracks have occurred and the cracks are partially connected, but not enough to separate the faces into compartments), E (more than 30 cracks have occurred, they are connected together and the faces are separated into compartments) Have been). In addition, although the inkjet recording medium which does not have the continuous crack in this invention contains AC, it is preferable that it is about A or B in order that a recording surface has favorable surface quality.

[Measurement of latex inside paper support]
The produced recording medium is cut with a microtome, and the cross section is observed with a microscopic Raman spectrophotometer manufactured by JASCO Corporation. From the presence or absence of a Raman emission peak peculiar to each latex, the latex is impregnated from the surface of the support. Measured depth.

  Tables 3 and 4 show the print density, ink absorbency, and curl evaluation results of the recording media obtained in each Example and each Comparative Example.

  By comparing each example and each comparative example, it can be seen that according to the present invention, an ink jet recording medium having good surface quality and low curl while maintaining high printing density and ink absorbability can be obtained.

  By comparing Examples 1-3, it can be seen that curl is reduced by using a styrene-butadiene copolymer as the binder in the dispersion.

  By comparing Examples 3-6, the use of either an alkylsulfosuccinic surfactant, an acetylene glycol surfactant or a fluorosurfactant as the penetrant in the dispersion would improve curl. It turns out that it decreases.

By comparing Examples 7 and 8 with Example 9, it can be seen that curling is reduced when the amount of the dispersion applied to the paper support is 35 g / m ² or more.

  By comparing Example 4 and Example 10, it can be seen that curling is further reduced when the surface temperature immediately after application and drying of the dispersion liquid on the base paper is 70 ° C. or higher.

  As can be seen from Comparative Example 8, even with the conventional technique, it was possible to obtain an ink jet recording medium in which curling is difficult to occur by forming cracks in the ink receiving layer. However, such a recording medium is continuous on the surface. Compared with the ink jet recording medium without cracks, the gloss was very inferior.

Claims (5)

An ink jet recording medium comprising a paper support having a thickness of 100 μm or more and having a recording surface with a 60 ° specular glossiness of 20% or more as defined in JIS Z 8741 and no continuous cracks on the surface of the recording surface. In the production method, a latex comprising 1% by mass or more and 10% by mass or less of a non-volatile content and a penetrant of 0.75% by mass or more and 2% by mass or less as a non-volatile content on a surface opposite to the recording surface A method for producing an ink jet recording medium, wherein the liquid is impregnated so as to have a non-volatile mass of 1 g / m ² or more and then dried.   2. The method for producing an ink jet recording medium according to claim 1, wherein the latex is a latex of a styrene-butadiene copolymer.   2. The ink jet recording according to claim 1, wherein the penetrating agent is one or more surfactants selected from acetylene glycol surfactants, alkylsulfosuccinic acid surfactants, and fluorine surfactants. A method for manufacturing a medium. ^{2. The} method for producing an ink jet recording medium according to claim 1, wherein a liquid application amount of the dispersion liquid is 35 g / m ² or more.   2. The method for producing an ink jet recording medium according to claim 1, wherein after the impregnation, drying is performed so that the surface temperature of the opposite surface becomes 70 ° C. or higher.