JP2012040690A - Inkjet recording sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inkjet recording sheet which does not generate a feathering phenomenon to a solvent ink using isoparaffins or ethers as solvents, or oil solvents called the so-called plasticizer, can make a sharp recording image available with high image density, gives feeling of glossiness, suited for use application to displays, advertising posters or wall paper, which is compatible with the sharpness of an image, and further, reveals desirable ink absorption and dryness.SOLUTION: This inkjet recording sheet includes a solvent ink image receiving layer composed mainly of polymethacrylate ester resin formed on at least one of the surfaces of a support. In addition, the content of a water-soluble resin of the solvent ink image receiving layer accounts for less than 5 mass%. Besides, the amount of coating of the solvent ink image receiving layer during drying is 5.0 to 45.0g/m. The glossiness at 75° of the surface of the ink image receiving layer, which is stipulated by JIS P 8142:2005 "Paper and Board-75° Mirror Surface Glossiness Test Method" is 15 to 100%.

Description

  The present invention is suitable for an ink jet recording system using an organic solvent such as a solvent ink as an ink solvent, and has excellent surface gloss and / or solvent ink ink absorbability and color development. The present invention relates to an ink recording sheet.

  Inkjet recording methods let ink droplets fly by various operating principles such as the deflection method, cavity method, thermojet method, bubble jet method, thermal ink jet method, slit jet method, and spark jet method. Then, it is attached to an ink jet recording sheet using paper, non-woven fabric, film or the like as a support to record images and characters. In addition, it has advantages such as high speed, low noise, easy multi-coloring, high flexibility of recording patterns, no need for development-fixing, and rapid use in various applications as recording devices for various figures and color images including kanji. Is popular.

  In particular, an image recorded by an ink jet recording method using multicolor inks each containing a color material such as yellow, magenta, cyan, and black in a solvent is comparable to multicolor printing by a plate making method. It is possible to obtain a recorded image. In addition, since it is inexpensive, it is widely applied to the field of full-color image recording in applications that require a small number of copies.

  Most of such ink jet recording systems use water-based inks in which various water-soluble dyes are dissolved in water or a mixed solvent of water and a hydrophilic solvent, and various additives are blended as necessary. Water-based ink has advantages such as vivid and bright color tone after printing, large ink dot contrast, easy adjustment of ink viscosity, and high safety. However, since a water-soluble dye is selected as the color material, it is difficult to increase the solubility of the color material in the ink solvent. 2) Solubility in water, color development of the image, and image storage There is a problem that it is difficult to design a water-based dye that can achieve both stability and stability.

  Therefore, as means for solving these problems, as a color material, for example, a disperse dye, a naphthol dye, a sulfide dye as a dye system, carbon black or various color pigments as a pigment, and as an ink solvent, for example, Solvent inks using solvents such as isoparaffins, ethers and plasticizers are very effective and are in practical use.

  The solvent ink 1) It is easy to dissolve or disperse the oil-soluble dye in the solvent at a high density, that is, it is possible to realize a high image density comparable to a silver salt photograph. 2) Basically, water resistance is better than water-based ink. 3) Compared to water-soluble dyes, it excels in that there is a degree of freedom in the molecular design of dyes considering light resistance and ozone resistance. In addition, 4) there is an advantage that the clogging of the head nozzle of the ink jet apparatus is less likely to occur. Because of this, light resistance and ozone resistance are particularly excellent, so it is widely used for wallpaper applications in large-format POP art, advertising and display applications. As the required quality, glossiness is required in addition to the suitability for printing with solvent inks in large format displays.

  However, on the other hand, the glossiness and glossiness vary depending on the use and the taste of the viewer. That is, not only a recording medium with a high glossiness but also a recording medium called a semi-gloss type in which the surface gloss is suppressed to some extent may be desired. Especially when used in displays and posters that are used indoors with strong illumination, if the glossiness is high, light may be scattered depending on the viewing angle, making it difficult to see. There is also a need for a semi-gloss type recording sheet that has a low gloss while having it. In addition, when pasted on the wall for advertising / display applications, a thin base material was used so that the lower layer of the design could not be seen through because the new advertisement was placed on top of the old advertisement. Even in this case, high opacity is required while maintaining whiteness.

  Ink-jet recording paper for water-soluble dyes and pigment inks often used in ink-jet recording systems has high print dot density, bright and vivid color tone, fast ink absorption, and even when print dots overlap. Ink does not run out or bleed, the spreading of printed dots in the lateral direction does not become larger than necessary, the shape of the ink dots is close to a perfect circle, the surrounding area is smooth and unblurred, and the whiteness is high It is necessary to satisfy such requests. In order to satisfy these requirements, ink jet recording paper generally has an ink receiving layer formed on a support to improve ink fixing properties. The ink receiving layer is intended to absorb a large amount of water or a mixed solvent of water and a hydrophilic solvent immediately after printing, and to fix a small amount of water-soluble ink efficiently. It is designed to exert an effect on the water-based ink dissolved in.

  However, this type of ink receiving layer is not suitable for solvent inks using oil-soluble dyes. In recent years, solvent inks are suitable for solvent inks that use lipophilic and hydrophobic synthetic amorphous silica and, if necessary, are coated on a support with a binder to meet the above requirements. Ink jet recording paper on which an ink receiving layer is formed has been proposed (see, for example, Patent Documents 1 and 2). The patent document 1 utilizes the lipophilicity of amorphous silica, and the patent document 2 utilizes the lipophilicity of amorphous silica and alumina. It is preventing. However, unlike conventional ink-jet recording paper for water-based inks, when synthetic amorphous silica having high lipophilicity and oil-absorbing property is used for the recording sheet for solvent ink at a high blending ratio shown in Patent Documents 1 and 2 In addition, glossiness is not obtained, and even if the image is output with a printer, the dot diameter of the ink becomes too small, and even if a high-definition image without blur is obtained, the recording density of the image is thin and clear. It becomes inferior. Furthermore, Patent Document 1 suggests that a certain amount of a water-soluble resin is blended as a non-dye-dyeable resin. However, since the water-soluble resin cannot swell and dye with respect to the solvent ink, Patent Document 1 In the case of the blending amount, repellency or unevenness occurs in the image when solid printing is performed.

  In order to obtain the clarity of the recorded image, unlike the above-mentioned Patent Document 1 and Patent Document 2, the ink receiving layer uses a silica having a large specific surface area and a reduced oil absorption, and the dot diameter of the printed oil-based ink is increased. Thus, a method for obtaining the image density has been proposed (see, for example, Patent Document 3). Matte oil-based ink jet recording media that do not scatter light still have low image sharpness and inferior vividness, which is particularly fatal for display applications. For this reason, a semi-gloss type recording medium is desired.

  In recent years, in order to give a recorded image a high-class feeling or a photographic-like quality, a glossy layer is provided by smoothing the surface. Changes depending on its use and preference of what it sees. In other words, not only recording media with high glossiness but also displays and posters that are used indoors with strong illumination, and if the glossiness is high, light is scattered depending on the viewing angle, making it difficult to see. In some cases, a semi-gloss type recording medium in which the gloss of the surface is suppressed to some extent is desired.

JP-A-10-250219 JP 2001-270238 A JP 2005-96167 A

  Therefore, the object of the present invention is to eliminate the above-mentioned drawbacks of the prior art with respect to solvent inks using oil-based solvents such as isoparaffins, ethers, or so-called plasticizers as solvents. Provides an ink jet recording sheet that provides a clear recorded image, high image density, high image density, glossiness suitable for display, advertising posters, and wallpaper applications, and ink absorbability and drying properties. There is to do. Coloring materials used in this solvent ink include, for example, naphthol dyes, azo dyes, metal complex dyes, anthraquinone dyes, quinoimine dyes, indigo dyes, cyanine dyes, quinoline dyes, nitro dyes, nitroso dyes, benzoquinone dyes as oil-soluble dyes, Examples thereof include carbonium dyes, naphthoquinone dyes, naphthalimide dyes, phthalocyanine dyes, and perinine dyes. In addition, carbon black and various color pigments are used as pigments, and examples of organic pigments include insoluble azo pigments, condensed azo pigments, chelate azo pigments, perinone pigments, nitro pigments, nitroso pigments, perylene pigments, and aniline black. Can do.

  As a result of intensive studies on the above-mentioned problems of solvent inkjet recording sheets, the present inventors have found an inkjet recording sheet in which a solvent ink image-receiving layer mainly composed of a specific resin is provided on at least one surface of a support. The present inventors have found that a clear recorded image having a glossy feeling can be obtained by using a specific resin as a main component while having an action required for a conventional oil-based inkjet recording sheet.

  That is, in the ink jet recording sheet of the present invention, a solvent ink image-receiving layer is formed on at least one surface of a support, and the image-receiving layer is made of a polymethacrylate resin, and 35.0 to 100.0 mass based on the layer. % Content, it has a high gloss and can obtain a good recorded image with respect to the inkjet ink. Further, by adding a certain amount of synthetic amorphous silica to the solvent ink image-receiving layer, glossiness can be adjusted, and more excellent ink absorbability and drying properties can be obtained. In addition, it has been found that by providing an ink receiving layer containing amorphous silica between the support and the solvent ink image receiving layer, even better ink absorbability can be obtained.

  Further, in the present invention, a back coating solution containing at least a direct coloring pigment or dye and a water-insoluble resin is applied to the surface of the support opposite to the solvent ink image-receiving layer, and JIS P 8149: 2000 “paper and paperboard” is used. -Opacity test method (backing of paper)-Diffuse illumination method has an opacity of 97% or more, and the solvent ink image-receiving layer surface is JIS P 8148: 2001 "paper, paperboard and pulp-ISO whiteness ( This is an ink jet recording sheet having a whiteness specified in “Measurement method of diffuse blue light reflectance” ”of 83% or more.

  With such a configuration, the ink jet recording sheet according to the present invention enables high-quality recording with an ink jet printer using a solvent ink, and can obtain a high gloss feeling according to the intended use. By blending an amount of amorphous silica, it is possible to obtain glossiness and high ink absorbency. Further, by providing an ink absorbing layer containing at least amorphous silica and a water-soluble polymer between the support and the solvent ink image-receiving layer, better solvent ink absorbability can be obtained, and Cockling can be suppressed even when a plastic film or a synthetic fiber sheet is used as the material. Here, cockling undulates because hydrogen bonds between natural pulps such as high-quality paper and coated paper used as a support for an inkjet recording sheet are cut by a solvent (water) of a water-based ink and partially stretched. A phenomenon. Even when solvent ink is used, when a plastic film is used for the recording sheet or when an oil-soluble resin is used for the ink receiving layer, the printed portion may swell and cause cockling. . Cockling not only reduces the transportability and handling of the printer, but also requires precise recording such as drawings output by an ink jet recording plotter, or when obtaining high-quality recorded images in recent years. This is not a preferable phenomenon.

  Further, by providing an oil-based ink permeation preventive layer mainly composed of amorphous silica and a water-soluble polymer adhesive between the support and the solvent ink image-receiving layer or between the support and the ink-receiving layer, The ring can be completely suppressed. Furthermore, by providing a backcoat layer using a nonionic coloring pigment on the surface opposite to the solvent ink image-receiving layer on the support, it is possible to prevent the lower layer pattern from seeping through when used in wallpaper or poster applications. be able to.

  Next, the present invention will be described in detail, but the present invention is not limited to these embodiments.

The solvent ink image-receiving layer of the present invention comprises a polymethacrylic acid ester resin as a main component, and the polymethacrylic acid ester resin is swollen and dyed by the solvent of the solvent ink to obtain a good recorded image. Among them, a good recorded image can be obtained by using at least one resin selected from polymethyl methacrylate, polyethyl methacrylate, polybutyl methacrylate and polyisobutyl methacrylate. The blending amount of the polymethacrylate resin is determined by the required quality, but the range is 35.0 to 100.0% by mass, particularly 40.0 to 100.0% by mass, based on the solvent ink image-receiving layer. %, Preferably 50.0 to 100.0 mass%, more preferably 60.0 to 100.0 mass%. The higher the blending ratio of the polymethacrylate resin, the higher the glossiness can be obtained. However, if it is less than 35.0% by mass, the resin swellability with respect to the solvent ink is poor and ink absorption failure or bleeding occurs, and the dyeing property to the resin is also inferior, and a clear image cannot be obtained. When the content is 40.0% by mass or more, a particularly satisfactory clear image can be obtained.

  Resins other than polymethacrylic acid esters can be blended in the solvent ink image-receiving layer of the present invention. As a thing excellent in the swelling property and dyeing property with respect to a solvent ink, a vinyl chloride resin or its copolymer can be mentioned as a suitable thing. In some cases, vinyl chloride resins are avoided from safety issues such as dioxins. For example, conjugated diene heavy polymers such as styrene-butadiene copolymer and methyl methacrylate-butadiene copolymer can be cited as examples. Copolymer latex, acrylic polymer latex such as acrylic acid ester polymer or copolymer, vinyl polymer latex such as ethylene-vinyl acetate copolymer, or carboxyl group, cationic group, etc. of these various polymers Functional group-containing modified polymer latex, blends thereof and the like. However, since these resins are inferior in swelling property and dyeing property to solvent inks compared to polymethacrylate resin, they must be blended within a range not impairing the effects of the invention.

  In particular, known water-soluble resins such as polyvinyl alcohol and polyvinyl pyrrolidone for inkjet recording paper using conventional water-based inks are effective in terms of improving the coating layer strength and ease of adjusting the liquid viscosity. However, since the water-soluble resin basically has no affinity with solvent ink, satisfactory swelling and dyeing are not performed, and repellent printing unevenness is likely to occur. Therefore, even when used for adjusting the strength of the solvent ink image-receiving layer and the viscosity of the coating liquid, the amount of the water-soluble resin is less than 5.0% by mass with respect to the solvent ink image-receiving layer, preferably 2. It is less than 5% by mass.

  The solvent ink image-receiving layer of the present invention can be blended with lipophilic and porous synthetic amorphous silica for the purpose of adjusting glossiness. Moreover, the improvement effect of the absorptivity with respect to solvent ink and a drying property is also acquired by this. The blending ratio is 20.0% by mass or less, preferably 15.0% by mass, and more preferably 10% by mass or less with respect to the solvent ink image-receiving layer. Regarding the relationship between the synthetic amorphous silica and the glossiness of the solvent ink image-receiving layer, the greater the amount, the lower the glossiness, but the better the ink absorbability and drying properties. On the contrary, the glossiness of the solvent ink image-receiving layer becomes higher as the amount is smaller. On the other hand, if it exceeds 20.0% by mass, the ink absorption and drying properties are excellent, but the glossiness and print density are low, so that a clear image cannot be obtained and the surface strength of the solvent ink image-receiving layer is inferior. End up. The average particle diameter of the amorphous silica is 6 to 15 μm, preferably 8 to 14 μm, more preferably 8 to 12 μm as measured by a laser diffraction method. If it is less than 6 μm, a large amount of silica must be added to suppress glossiness, resulting in poor image clarity. On the other hand, when the thickness exceeds 15 μm, the feeling of unevenness in the touch becomes remarkable. In addition, when an inorganic pigment other than amorphous silica, such as calcium carbonate, titanium oxide, or clay, is used, the concealing power is higher than that of amorphous silica, so the sharpness of the recorded image portion is significantly inferior. . Moreover, since these inorganic pigments are inferior in porosity compared with amorphous silica, the ink absorbability cannot be improved as compared with the reduction in glossiness.

  In the solvent ink image-receiving layer in the present invention, a crosslinking agent, a thickener, a fluidity improver, an antifoaming agent, an antifoaming agent, a dispersing agent, an antioxidant, and a pH adjusting agent are added as necessary without departing from the scope of the invention Etc. can be added. Furthermore, it is possible to add coloring pigments, dyes, fluorescent dyes and the like for adjusting the color tone.

The solvent ink image-receiving layer according to the present invention has a 75 ° glossiness of 15 as defined in JIS P 8142: 2005 “Paper and paperboard—75-degree specular gloss test method” on the surface of the solvent ink image-receiving layer. The ink jet recording sheet is characterized in that it is ˜100%, preferably 20 to 100%, particularly preferably 25 to 100%. Then, the coating amount of the solvent ink receiving layer, 5.0~45.0g / ^{m 2} in weight after drying, preferably 5~25.0g / ^{m 2,} more preferably 7.5~22.5g / M ² , more preferably 9.0 to 20.0 g / m ² . If it is less than 5 g / m ² , the solvent ink is not sufficiently absorbed, and glossiness is not obtained. When it exceeds 45.0 g / m ² , the ink absorbency and glossiness are not improved as compared with the coating amount, which is uneconomical and cockling becomes remarkable.

  The ink receiving layer of the present invention contains at least synthetic amorphous silica and a water-soluble polymer adhesive. This absorbs the solvent content of the solvent ink and suppresses ink drying on the surface of the recording sheet and cockling of the recording sheet. As an adhesive for synthetic amorphous silica, a non-oil-soluble water-soluble polymer is suitable for suppressing cockling. Synthetic amorphous silica generally includes precipitation method or gel method silica, which is porous and has high ink absorbability, and enables clear color development. The blending amount of the synthetic amorphous silica is not limited, but is preferably 30 to 70% by mass, more preferably 40 to 70% by mass, and still more preferably 50 to 68% by mass as a proportion of the ink receiving layer. %. The average particle diameter of the synthetic amorphous silica is 1 to 20 μm as an average particle diameter by a laser diffraction / scattering method, preferably 3 to 16 μm, more preferably 5 to 12 μm. If the average particle size is less than 1 μm, there is a problem that the strength of the coating layer is greatly reduced, and the viscosity of the coating solution is also greatly increased, which is a burden in the production process. Further, if it exceeds 20 μm, the surface smoothness is inferior, and when a solvent ink image-receiving layer is provided on the ink-receiving layer, not only a glossy feeling is obtained, but also depending on the application, for a glossy feeling and surface protection, In some cases, the surface of the recording surface is subjected to a laminating process or a film laminating process after printing. However, since the smoothness is low, troubles such as a gap between the recording sheet and the laminating film occur. In addition, fine particles other than silica can be used in combination with the ink receiving layer as necessary. These fine particles include kaolinite, talc, light calcium carbonate, heavy calcium carbonate, zeolite, alumina, barium sulfate, carbon black, zinc oxide, zinc sulfate, zinc carbonate, titanium dioxide, satin white, aluminum silicate, diatomaceous earth. , Inorganic fine particles such as calcium silicate, aluminum hydroxide, magnesium carbonate, magnesium hydroxide, acrylic or methacrylic, vinyl chloride, vinyl acetate, nylon, styrene-acrylic, styrene-butadiene, polystyrene-acrylic In general, fine particles generally used for paper coating, such as organic fine particles such as polystyrene, urethane, polyester, etc., are considered, but in view of image clearness, synthetic amorphous silica is preferable.

  Examples of the water-soluble polymer adhesive used in the ink receiving layer include polyvinyl alcohol, gelatin, casein, polyvinyl pyrrolidone, various modified products thereof, starch, and the like, and polyvinyl alcohol is preferable from the viewpoint of price. The so-called partial saponification type with a saponification degree of less than 90 mol% is inferior in water resistance of the coating film, and is very easy to foam, and it is difficult to obtain a beautiful coating surface continuously with a normal coating apparatus. % Or more is preferable. The blending amount is preferably 5.0 to 30.0% by mass, more preferably 7.5 to 25.0% by mass, and still more preferably 10.0 to 20.0% by mass in the ink receiving layer. .

  As the adhesive used for the ink receiving layer, a water-insoluble polymer adhesive can also be used. For example, vinyl chloride and copolymers thereof, conjugated diene polymer latex such as styrene-butadiene copolymer, methyl methacrylate-butadiene copolymer, acrylic acid ester or methacrylic acid ester polymer or copolymer acrylic Polymeric polymer latex, vinyl polymer latex such as ethylene-vinyl acetate copolymer, functional group-containing modified polymer latex such as carboxyl group and cationic group of these polymers, or blends thereof can be applied It is.

  In the ink-receiving layer, a crosslinking agent, a cationic resin, a thickener, a fluidity improver, an antifoaming agent, a foam suppressor, a dispersant, an antioxidant, pH, as necessary, as long as the present invention is not impaired. A regulator or the like can be added.

  The present invention provides a water-soluble polymer resin separately from the ink receiving layer in order to prevent cockling caused by swelling of the support by the solvent of the solvent ink when a plastic film, synthetic fiber, or the like is used for the support. It is also possible to provide an ink penetration preventing layer mainly composed of The ink permeation preventive layer is provided between the support and the solvent ink image receiving layer or between the support and the ink receiving layer. Examples of the water-soluble polymer used in the ink permeation preventive layer include polyvinyl alcohol, gelatin, casein, polyvinyl pyrrolidone, various modified products thereof, starch, and the like. Polyvinyl alcohol is preferable from the viewpoint of cost and film forming property. The so-called partial saponification type with a saponification degree of less than 90 mol% is inferior in water resistance of the coating film, and is very easy to foam, and it is difficult to obtain a beautiful coating surface continuously with a normal coating apparatus. % Or more is preferable.

  In the ink permeation preventive layer, a cross-linking agent, a thickener, a fluidity improver, an antifoaming agent, an antifoaming agent, a dispersing agent, an antioxidant, a pH adjusting agent, etc., as necessary, as long as the present invention is not impaired. Can be added. It is also possible to mix various fine particles to prevent blocking. Furthermore, it is possible to add coloring pigments, dyes, fluorescent dyes and the like for adjusting the color tone.

  The support of the present invention is not particularly limited and includes natural paper, plastic film, synthetic paper, non-woven fabric, cloth, wood, metal thin film, and the like, and is selected according to the application. When water resistance is required for the substrate depending on the application, synthetic paper or nonwoven fabric sheet made of plastic film or synthetic fiber is preferred. Examples of the plastic film include a polyester film, a polypropylene film, a polyethylene film, a plastic film such as nylon, vinylon, and acrylic, or a laminate of sheets. The plastic film is preferably uniaxially or biaxially stretched from the viewpoint of strength. Examples of the non-woven fabric include those formed by spreading polyethylene fibers in a sheet shape and thermocompression bonding to form a sheet shape.

  The color pigment used for the back coat layer provided on the back surface of the support of the present invention is limited to nonionic properties. An ionic coloring pigment easily aggregates and causes color spots. The back coat layer containing the color pigment in the present invention is to prevent the lower layer pattern from being seen through when it is overlaid for advertisement posters, wallpaper applications, and the like. When overlaying, a water-soluble adhesive is mainly applied to the back surface, and therefore a water-insoluble resin is preferable as the resin for fixing the color pigment to the support. Examples of water-insoluble resins include conjugated diene polymer latexes such as styrene-butadiene copolymers and methyl methacrylate-butadiene copolymers, and acrylic polymers such as acrylate or methacrylate polymers or copolymers. Examples thereof include latex polymer and vinyl polymer latex such as ethylene-vinyl acetate copolymer.

  Even if the back coat layer containing the color pigment described above is not provided, a back coat layer may be provided according to the purpose, such as generally known curling prevention, penetration prevention, and friction suitability improvement. it can.

The coating amount of the ink receiving layer and the ink permeation preventing layer formed on the support varies depending on the use of the recording sheet and the layer structure in the present invention and the support used, but it is necessary to increase it unnecessarily economically. There is no. And if a suitable example is given, an ink receiving layer is 3.0-20.0 g / m < ² > by the mass after drying, Preferably it is 4.0-15.0 g / m < ² >, More preferably, it is 5-12 g / m. ² . Ink penetration preventing layer, 0.5~10.0g / ^{m 2,} preferably from 1.0 to 5.0 g / ^{m 2.}

  A method for providing a solvent ink image-receiving layer, an ink-receiving layer, an ink permeation preventing layer, and a backcoat layer on the support is not particularly limited, and conventionally known gravure coating method, kiss coating method, dip method, spray coating method. It can be provided by a coating machine such as a curtain coating system, an air knife coating system, a blade coating system, a reverse roll coating system, or a bar coating system.

  The present invention will be described more specifically with reference to examples, but the present invention is not limited thereto. In the examples, “parts” and “%” represent “parts by mass” and “mass%”, respectively, unless otherwise specified. Moreover, all the mass% values in Examples and Comparative Examples indicate numerical values in terms of solid content after drying.

<Creation of support>
To a pulp slurry of LBKP 100 parts (Canadian Standard Freeness: CSF = 500 ml), 1.0 part of cationic starch, 5.0 parts of talc, 0.2 part of acidic rosin sizing agent and 1 part of liquid sulfuric acid band are added to the pulp. The prepared stock is made with a long net paper machine, and 6% of oxidized starch (trade name: Oji Ace A, manufactured by Oji Cornstarch Co., Ltd.) is dried on a paper press having a basis weight of 110 g / m ² using a size press. Was applied on-machine so that the surface was 1.5 g / m ² per side, and dried with a cylinder dryer to obtain a support.

The following solvent ink image-receiving layer formed on the support was coated and dried to a dry mass of 15.0 g / m ² to obtain an ink jet recording sheet.
(Solvent ink image-receiving layer)
Polybutyl methacrylate resin (HK-960MC made by Takamatsu Yushi) 100.0 mass%

  An ink jet recording sheet was obtained in the same manner as in Example 1 except that the polybutyl methacrylate resin HK-960MC was changed to a polymethyl methacrylate resin (mobile 790).

An ink jet recording sheet was obtained in the same manner as in Example 1, except that the solvent ink image-receiving layer was coated and dried so as to have a dry mass of 25.0 g / m ² .

An ink jet recording sheet was obtained in the same manner as in Example 1 except that the solvent ink image-receiving layer in Example 1 was coated and dried so that the dry mass was 5.0 g / m ² .

Inkjet recording sheet as in Example 1 except that the solvent ink image-receiving layer shown below formed on the support in Example 1 was coated and dried to a dry mass of 15.0 g / m ^2. Got.
(Solvent ink image-receiving layer)
Polybutyl methacrylate resin (HK-960MC made by Takamatsu Yushi) 96.0 mass%
Polyvinyl alcohol (Kuraray PVA-117) 4.0% by mass

Inkjet recording sheet as in Example 1 except that the solvent ink image-receiving layer shown below formed on the support in Example 1 was coated and dried to a dry mass of 15.0 g / m ^2. Got.
(Ink receiving layer)
Polybutyl methacrylate resin (HK-960MC made by Takamatsu Yushi) 60.0 mass%
Styrene-acrylic resin (Nichigo Mobile Vinyl 972) 40.0% by mass

In Example 1, the following solvent ink image-receiving layer formed on the support was coated and dried to a dry mass of 15.0 g / m ² to obtain an ink jet recording sheet.
(Solvent ink image-receiving layer)
Polybutyl methacrylate resin (HK-960MC made by Takamatsu Yushi) 60.0 mass%
Vinyl chloride-acrylic copolymer resin (Vinybran 278 manufactured by Nissin Chemical) 40.0% by mass

Inkjet recording sheet as in Example 1 except that the solvent ink image-receiving layer shown below formed on the support in Example 1 was coated and dried to a dry weight of 15.0 g / m ^2. Got.
(Solvent ink image-receiving layer)
Polybutyl methacrylate resin (HK-960MC made by Takamatsu Yushi) 47.5% by mass
Styrene-acrylic resin (Nichigo Mobile Vinyl 972) 47.5% by mass
Synthetic amorphous silica (Grace P-612 average particle size 12 μm) 5.0 mass%

Inkjet recording sheet as in Example 1 except that the solvent ink image-receiving layer shown below formed on the support in Example 1 was coated and dried to a dry mass of 15.0 g / m ^2. Got.
(Solvent ink image-receiving layer)
Polybutyl methacrylate resin (HK-960MC made by Takamatsu Yushi) 47.5% by mass
Styrene-acrylic resin (Nichigo Mobile Vinyl 972) 47.5% by mass
Synthetic amorphous silica (Grace 74x5500 average particle size 8μm) 5.0% by mass

Inkjet recording sheet as in Example 1 except that the solvent ink image-receiving layer shown below formed on the support in Example 1 was coated and dried to a dry mass of 15.0 g / m ^2. Got.
(Solvent ink image-receiving layer)
Polybutyl methacrylate resin (HK-960MC made by Takamatsu Yushi) 45.0% by mass
Styrene-acrylic resin (Nichigo Movinyl's Movinyl 972 45.0% by mass
Synthetic amorphous silica (Grace 74 × 5500, average particle size 8 μm) 10.0% by mass

Inkjet recording sheet as in Example 1 except that the solvent ink image-receiving layer shown below formed on the support in Example 1 was coated and dried to a dry mass of 15.0 g / m ^2. Got.
(Solvent ink image-receiving layer)
Polybutyl methacrylate resin (HK-960MC made by Takamatsu Yushi) 45.0% by mass
Vinyl chloride-acrylic copolymer resin (Vinyl Blanc 278 manufactured by Nissin Chemical) 45.0% by mass
Synthetic amorphous silica (Grace 74 × 5500, average particle size 8 μm) 10.0% by mass

Inkjet recording sheet as in Example 1 except that the solvent ink image-receiving layer shown below formed on the support in Example 1 was coated and dried to a dry mass of 15.0 g / m ^2. Got.
(Solvent ink image-receiving layer)
Polybutyl methacrylate resin (HK-960MC made by Takamatsu Yushi) 40.0 mass%
Styrene-acrylic resin (Nichigo Mobile Vinyl 972) 40.0% by mass
Synthetic amorphous silica (Grace 74 × 5500, average particle size 8 μm) 20.0% by mass

Inkjet recording sheet as in Example 1 except that the solvent ink image-receiving layer shown below formed on the support in Example 1 was coated and dried to a dry mass of 15.0 g / m ^2. Got.
(Solvent ink image-receiving layer)
Polybutyl methacrylate resin (HK-960MC made by Takamatsu Yushi) 80.0 mass%
Synthetic amorphous silica (Grace 74 × 5500, average particle size 8 μm) 20.0% by mass

(Solvent ink receiving layer)
In Example 1, after providing the solvent ink receiving layer shown below on the substrate so as to have a dry mass of 10.0 g / m ² , the same ink image receiving layer as in Example 1 was provided to prepare an ink jet recording sheet. Obtained.
Synthetic amorphous silica (Grace 74 × 5500, average particle size 8 μm) 66.7% by mass
Polyvinyl alcohol (Kuraray PVA-117) 13.3% by mass
Ethylene acetate-vinyl copolymer (Sumitomo Chemical Sumikaflex 450) 13.3% by mass
Cationic resin (Senka Papiogen P-105) 6.7% by mass

  An ink jet recording sheet was obtained in the same manner as in Example 14, except that the solvent ink image-receiving layer was the same as in Example 10.

In Example 14, an inkjet recording sheet was obtained in the same manner as Example 14 except that 1.0 g / m ^{2 of the following} back coat layer was applied to the back surface of the support.
(Back coat layer)
Color pigment (Daiichi Seika TB708 Blue) 15.0%
Styrene-butadiene latex (Asahi Kasei P6030) 85.0 mass%

In Example 15, an inkjet recording sheet was obtained in the same manner as in Example 15 except that 1.0 g / m ^{2 of the following} back coat layer was applied to the back surface of the support.
(Back coat layer)
Colored pigment (TB708 blue, manufactured by Dainichi Seika) 15.0% by mass
Styrene-butadiene latex (Asahi Kasei P6030) 85.0 mass%

  An ink jet recording sheet was obtained in the same manner as in Example 3 except that the support was a polyethylene terephthalate film (Crisper K2312 100 μm thickness, coated surface 23 surface, manufactured by Toyobo Co., Ltd.).

An ink jet recording sheet was obtained in the same manner as in Example 18 except that the solvent ink image-receiving layer was changed to 45 g / m ² by dry weight in Example 18.

In Example 18, after forming the following ink permeation preventive layer on the support so as to have a dry mass of 2 g / m ² , an ink image-receiving layer was provided in the same manner as in Example 18. Thus, an ink jet recording sheet was obtained.
<Ink penetration prevention layer>
Synthetic amorphous silica (Grace P-612 average particle size 12 μm) 4.5% by mass
Polyvinyl alcohol (Kuraray PVA-117) 90.5 mass%
Zirconyl acetate (Zircosol ZA-30 manufactured by Daiichi Elemental Chemistry) 4.5% by mass
Antifoaming agent (San Nopco SN deformer 777) 0.50% by mass
[Comparative Example 1]

A recording sheet was obtained in the same manner as in Example 1, except that the polybutyl methacrylate resin (HK-960MC made by Takamatsu Yushi) in the solvent ink image-receiving layer was changed to styrene-acrylic resin (Minvinyl 972 made by Nichigo Movinyl). Got.
[Comparative Example 2]

In Example 1, a recording sheet was obtained in the same manner as in Example 1 except that the polybutyl methacrylate resin (HK-960MC manufactured by Takamatsu Yushi) in the solvent ink image-receiving layer was changed to a polyvinyl alcohol resin (PVA117 manufactured by Kuraray).
[Comparative Example 3]

In Example 1, a recording sheet was prepared in the same manner as in Example 1 except that the solvent ink image-receiving layer shown below formed on the support was coated and dried to a dry mass of 15.0 g / m ^2. Obtained.
(Solvent ink image-receiving layer)
Polybutyl methacrylate resin (HK-960MC made by Takamatsu Yushi) 90.0 mass%
Polyvinyl alcohol (Kuraray PVA-117) 10.0% by mass
[Comparative Example 4]

Example 4 is the same as Example 4 except that the polybutyl methacrylate resin (HK-960MC manufactured by Takamatsu Yushi) in the solvent ink image-receiving layer is changed to a vinyl chloride-acrylic copolymer resin (Vinibran 278 manufactured by Nissin Chemical). A recording sheet was obtained.
[Comparative Example 5]

In Example 1, a recording sheet was obtained in the same manner as in Example 1 except that the solvent ink image-receiving layer was applied and dried so that the dry mass was 2.5 g / m ² .
[Comparative Example 6]

In Example 1, a recording sheet was obtained in the same manner as in Example 1 except that the solvent ink image-receiving layer was applied and dried so as to have a dry mass of 50.0 g / m ² .
[Comparative Example 7]

In Example 1, a recording sheet was prepared in the same manner as in Example 1 except that the solvent ink image-receiving layer shown below formed on the support was coated and dried to a dry mass of 15.0 g / m ^2. Obtained.
(Solvent ink image-receiving layer)
Polybutyl methacrylate resin (HK-960MC made by Takamatsu Yushi) 70.0 mass%
Synthetic amorphous silica (Grace 74x5500) 30.0% by mass
[Comparative Example 8]

  A recording sheet was obtained in the same manner as in Example 13 except that the solvent ink image-receiving layer was not provided.

  The ink jet recording sheets or recording sheets obtained in Examples and Comparative Examples were evaluated for performance by the following methods.

(1) Evaluation of glossiness of white paper (Glossiness)
The obtained ink recording sheet or the blank portion of the recording sheet was measured for 75 ° glossiness as defined in JIS P8142: 2005 using “GLOSS METER GM-26D”. The higher the value, the better the gloss.

(2) Evaluation of ink absorbency (absorbency)
Image sample N2A "cafeteria" in "High-definition color digital standard image data ISO / JIS-SCID JIS X 9201-1995 compliant" is output using an inkjet printer (JM-3 manufactured by MIMAKI ENGINEERING) using organic solvent solvent ink. The ink absorptivity was evaluated from the degree of drying and bleeding of the image. ◎ if there is no blur in the image and excellent in absorbency, ○ if there is no problem in practical use, △ if there is anxiety in practical use, cause ink absorption, blur or unevenness in the image, etc. The one with x was marked as x.

(3) Evaluation of print uniformity (uniformity)
Image sample N6A “Color chart” in “High-definition color digital standard image data ISO / JIS-SCID JIS X 9201-1995 compliant” using an inkjet printer using organic solvent-based solvent ink (JM-3, manufactured by Mimaki Engineering) The output was evaluated to evaluate the uniformity of the dark solid print portion. An image with no unevenness and excellent uniformity ◎, an image with no practical problems ○, an image with unevenness and anxiety in practical use △, an uneven ink absorption unevenness and / or an ink repelling unevenness Those that occurred and had problems in actual use were marked with x.

(4) Evaluation of printing density (color density)
Image sample N6A “Color chart” in “High-definition color digital standard image data ISO / JIS-SCID JIS X 9201-1995 compliant” using an inkjet printer using organic solvent-based solvent ink (JM-3, manufactured by Mimaki Engineering) Then, the dark color portion and the black color density were measured with a printing densitometer Macbeth RD-19I. The higher the print density value, the darker and darker the density.

(5) Coating layer strength (strength)
A 3M scotch sealing masking tape 79H was applied to the surface of the solvent ink image-receiving layer, and the degree of peeling of the coating layer when it was peeled off was evaluated. ◎ if it is not peeled off at all, ○ if it is slightly peeled off, but there is no practical problem, ○ if the coating layer is partially taken on the adhesive surface of the tape, △ if it is practically uneasy, and if it is peeled entirely X.

(6) Evaluation of cock ring (cock ring)
After outputting the image sample N2A “cafeteria” in “High-definition color digital standard image data conforming to ISO / JIS-SCID JIS9201-1995” using an ink jet printer using organic solvent solvent ink (JV-3 manufactured by MIMAKI ENGINEERING) After being left for 24 hours under the conditions of 23 ° C. and 50% RH, the blurred state of the printed image portion was observed. The case where there was almost no blurring visually was rated as ◎, the case where slight blurring occurred but no problem in practical use was marked as ◯, the case where blurring occurred, and a problem in practical use was marked as x.

(7) Whiteness About the ink image-receiving glossy layer surface, the whiteness specified in JIS P 8148: 2001 was measured using PF-10 manufactured by Nippon Denshoku Industries Co., Ltd.

(8) Opacity The opacity specified in JIS P 8149: 2000 was measured using PF-10 manufactured by Nippon Denshoku Industries Co., Ltd.

  Table 1 shows the evaluation results of the ink jet recording sheet and the recording sheet. The ink jet recording sheets obtained in Examples 1 to 20 have physical property values that match the present invention as shown in Table 1, have clear color development properties and glossiness suitable for advertising / poster use, and printing. Later cockling was also good. Further, by blending synthetic amorphous silica in the solvent ink image-receiving layer, it is possible to further improve the ink absorbency while obtaining a glossiness suitable for the application. In addition, it can provide a higher gloss than vinyl chloride resin that has been generally used for organic solvent-based inkjet media, and is not suitable for safety issues such as dioxins. It can be made of vinyl chloride.

  On the other hand, when the ink image-receiving glossy layer is not a predetermined composition and / or coating amount, and when the solvent ink image-receiving layer is not provided as in the predetermined comparative example 8, the ink absorptivity, print uniformity, A defect was caused in any of the color density, cockling, and glossiness.

Claims (5)

A solvent ink image-receiving layer is formed on at least one surface of the support, and the image-receiving layer contains 35.0 to 100.0% by mass of a polymethacrylate resin based on the layer, and 5% of a water-soluble resin. Less than 0.0% by mass, the coating amount when the layer is dried is 5.0 to 45.0 g / m ² , and the surface of the solvent ink image-receiving layer is JIS P 8142: 2005 “Paper and Paperboard— An ink jet recording sheet having a 75 ° glossiness of 15 to 100% as defined in the “75 ° specular gloss test method”. The polymethacrylic ester resin is mainly composed of at least one resin selected from polymethyl methacrylate, polyethyl methacrylate, polybutyl methacrylate and polyisobutyl methacrylate resin. The ink jet recording sheet according to claim 1, comprising 100.0% by mass. The inkjet recording sheet according to claim 1 or 2, wherein the solvent ink image-receiving layer contains amorphous silica at 20.0 mass% or less. 4. An ink jet recording sheet according to claim 1, wherein an ink receiving layer containing at least amorphous silica and a water-soluble polymer adhesive is provided between the support and the solvent ink image receiving layer. A back coat layer containing at least a nonionic coloring pigment is applied and formed on the surface of the support opposite to the solvent ink image receiving layer, and JIS P 8149: 2000 “paper and paperboard—opacity of the solvent ink image receiving layer surface is formed. The opacity specified in “Test method (backing of paper) —diffuse illumination method” is 97% or more, and the surface of the solvent ink image-receiving layer is JIS P 8148: 2001 “paper, paperboard and pulp—ISO whiteness (diffuse blue) 5. The ink jet recording sheet according to claim 1, wherein the whiteness specified in “Measurement method of light reflectance” is 83% or more.