JP2001071635A - Ink jet recording medium for proof reading - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink jet recording medium which is suitable for the printing correction for a paper container by pressing an ink receiving layer, which is under a wet state, to a heated mirror-finished surface roll, drying the ink receiving layer, and providing a glossy finish for an ink jet recording medium, wherein at least one layer of the ink receiving layer is provided on a supporting body for which at least two layers are laminated. SOLUTION: In order to obtain an ink jet recording medium for proof reading, which is suitable for a printing correction for a paper container or the like, and is excellent in ink jet printer property, a cast treatment is applied while an ink receiving layer provided on a supporting body is still under a wet state. As a method for the cast treatment, a direct method, a gelling method and a wet method can be counted. The direct method among them is performed in such a manner that a strong glossy finishing process is performed by pressing the applied layer to a heated mirror-finished drum surface while the applied layer, which is applied on the supporting body, is still under a wet state. Also, the supporting body is preferably laminated with an adhesive layer. As the adhesive layer, a layer comprising a solvent based adhesive or a layer, which is formed by a melt-extrusion method of a thermoplastic resin, is preferable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet recording medium used for print proofreading utilizing an ink jet recording method. More particularly, the present invention relates to an ink jet recording medium suitable for paper container print proofing, such as a decorative box design.

[0002]

2. Description of the Related Art In recent years, remarkable progress in ink jet printers and plotters has made it possible to easily obtain full-color and high-definition images.

In the ink jet recording system, fine droplets of ink are made to fly by various operating principles and adhere to a recording medium such as paper, thereby recording images and characters.
2. Description of the Related Art Ink jet printers and plotters have rapidly become widespread in various applications in recent years as hard copy creation devices for image information such as characters and various figures created by computers. In particular, a color image formed by a multi-color ink jet method can obtain a record comparable to multi-color printing by a plate making method or printing by a color photographic method, and is used in applications where the number of copies is small. Is widely used because it is cheaper than printing and photographic techniques.

[0004] In recent years, printed matter using the ink jet recording method has been increasingly used for print color calibration for confirming the finish of printed matter in advance. In recent printers, products dedicated to printing color proofing have also appeared on the market, and it has been desired to commercialize recording media corresponding to the products. Here, it is most important for the ink jet recording medium used for print proofreading to faithfully reproduce the color tone, texture and texture of the proofreading product.

[0005] Generally, the color of printing paper used for printing is not pure white but has a color depending on the purpose. On the other hand, inkjet paper is required to have ink absorbency, color reproducibility and the like, and pigments, adhesives and various additives to be used are devised. As a pigment, a porous synthetic pigment is often used to obtain absorptivity, and its color tone is unique white in order to make the color of an inkjet image clear.
Further, due to the nature of the pigment, it is difficult to give a luster, and there are many matte pigments usually called matte. In order to obtain gloss, there is also inkjet paper that has been cast,
Also in this case, the whiteness is a unique whiteness derived from the pigment.

Japanese Patent Application Laid-Open No. 62-202781 discloses a recording material in which at least one side surface of a base material having two or more layers is provided with ink receptivity. This is a basis weight is ^{120g / m 2 ~500g / m 2} , the case of obtaining the texture, such as a silver halide photographs and postcards, thick texture is intended to satisfy. However, when used for purposes such as proofing for paper container printing, there is no glossiness due to the matte tone,
It becomes a proof print that is far from the real one.

As described above, in the existing ink jet recording medium, the brightness and chromaticity of the ink jet recording medium are greatly different from those used for print proofing, and the glossiness and texture of the ink jet recording medium are different from those of the proofreading product. This was a major problem and was not satisfactory for use in print proofing.

[0008]

If an existing ink jet recording medium is directly used for paper container print proofing, the difference in glossiness and texture from the target product is large, and it is not suitable for paper container print proofing. Therefore, the present inventors believe that the purpose of paper container printing proofreading can be sufficiently achieved if the proofreading is assembled in the same box or the like as the final product by cutting out the proofed print, etc. An inkjet recording medium having similar glossiness and texture and suitable for paper container print proofing was produced. That is, an object of the present invention is to provide an ink jet recording medium for proofreading excellent in ink jet printer suitability, which is suitable for print proofing of paper containers and the like, and in which the final product can be realized by assembling the print proof to the same shape as the actual target product. Is to do.

[0009]

In other words, an ink jet recording medium of the present invention is an ink jet recording medium comprising at least one ink receiving layer provided on a support having two or more layers laminated thereon, wherein the ink receiving layer is in a wet state. An ink jet recording medium for calibration, characterized in that it is pressed against a heated mirror-finished roll during a certain period, dried, and gloss-finished.

In one preferred embodiment, the support is laminated via an adhesive layer. If the adhesive layer is made of a solvent-based adhesive or is made of a melt-extruded layer of a thermoplastic resin. preferable.

[0011] Further, a case where the support is laminated by laminating is also one of preferred embodiments.

The basis weight of the ink jet recording medium (g / m
² ) is preferably 200 g / m ² or more and 800 g / m ² or less.

JIS-Z8722 of the surface layer of the ink receiving layer
According to the measurement method specified in, the lightness index (L ^* ) and the perceived chromaticity index (a ^* ,
b ^* ) differs from the values of the lightness index (L ^* ) and the perceived chromaticity index (a ^* , b ^* ) of the printing paper to be calibrated according to JIS-Z8.
More preferably, the color difference (ΔE ^* ) stipulated by 730 is equal to or less than 3.

Further, the ink receiving layer may be provided not only on the front side but also on the opposite side via the support.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an ink jet recording medium of the present invention will be described in detail.

In one embodiment of the support having two or more layers as referred to in the present invention, an ink receiving layer is provided on one side of the first support, and the second support is adhered to the other side of the support. It is manufactured by sticking together. Here, paper is most commonly used as the first support provided with the ink receiving layer. As the second support to be laminated, paper, white paperboard, synthetic paper, resin-coated paper, film, synthetic resin plate, wood plate, metal plate, woven fabric, nonwoven fabric and the like are generally mentioned. In particular, thick papers such as postcard paper and white paperboard can be suitably used in the present invention. Furthermore, a support having an ink receiving layer provided on the surface thereof may be used. In this case, by bonding the opposite sides provided with the ink receiving layer to each other, a recording medium having double-sided inkjet suitability can be obtained.

As the lamination method, any conventionally known method can be suitably used. For example, starch, oxidized starch,
Starch derivatives such as cationized starch, etherified starch and phosphate esterified starch, carboxymethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, cellulose derivatives such as cellulose sulfate, polyvinyl alcohol of various saponification degrees or silanol modified products thereof, carboxylated products, cations Various derivatives such as chloride, casein, gelatin, denatured gelatin, natural polymers such as soybean protein, polyvinyl pyrrolidone, sodium polyacrylate, styrene-maleic anhydride copolymer sodium salt, and water-soluble synthetic compounds such as polystyrene sodium sulfonate Emulsions of water-insoluble resin such as molecules, acrylic resin, ethylene-vinyl acetate resin, nitrile rubber, chloroprene rubber, nitrocellulose, acrylic resin, butyral resin, polyether Solvent-based adhesive such as ether resin, more can be stacked support polyolefins, the thermoplastic resin heat melt polyester as an adhesive layer.
Among them, the solvent-based adhesive does not cause expansion and contraction of the support,
It is preferably used because it does not affect the surface properties of the ink receiving layer.

Another embodiment of the support having two or more layers as referred to in the present invention is that a paperboard, a white paperboard or the like composed of several layers is used as a support and an ink receiving layer is formed thereon. It is manufactured by providing.

The white paperboard for a support which is preferably used in the present invention is formed by laminating several layers.
By combining various types of pulp, properties that do not exist in the papermaking paper are further imparted. That is, high rigidity, bulky paper, strong strength, and the like. In the case of paper with a large basis weight, multi-layer making is easier to form than single-layer making,
There is also an advantage that strength can be obtained by improving the formation. It is also possible to use waste paper pulp or mechanical pulp for the middle layer.

As described above, multilayer papermaking is advantageous for paper having a high basis weight. However, in order to bond several papers to form a multilayer, mutual adhesion between respective layers is important. If the degree of adhesion between the layers is low, peeling between layers may be caused by stress during printing and processing. The inter-layer adhesion usually utilizes the entanglement of fibers and the adhesive force of chemicals. The chemicals use starch, polyacrylamide, etc., for example, give starch by spraying between layers with a wire part,
There is a method of gelatinizing by the heat of the dryer in the next step to obtain an adhesive strength.

White paperboard is roughly classified into two types, a manila ball and a white ball, depending on the raw materials to be made, and there are coated products and uncoated products. Manila balls are further divided into high-grade paperboard, special paperboard, and general manila balls, each of which has a different raw material. High-grade paperboard is composed of ivory using 100% virgin pulp and card using mechanical pulp or waste paper pulp in the middle layer. Coated products are coated on the front and back. Often used. Special paperboard is a paper made by coating a single-sided coating liquid that does not use a fluorescent dye on the same base paper as high-grade paperboard, and is mostly used for high-quality paper containers (boxes for cosmetics, medicines, foods, etc.). Also,
General manila balls use mechanical pulp or waste paper pulp for the middle and back layers, and are used for general food boxes and the like. There are coated and uncoated products for white balls, but there are many coated white balls whose surfaces are coated using virgin pulp for the surface layer and waste paper pulp for the middle and back layers. Court white ball
It is used as a box (paper container) for foods, detergents, toys, tissues, etc.

Here, the functions required for the paper container will be described. Protection function; 2. Beautification / exhibition function; 3. Handling and transport functions Hygiene functions in the case of food are listed. The protection function protects the contents from dirt during the distribution channel and the exhibition period, prevents discoloration and deterioration of the contents due to sunlight, ultraviolet rays, indoor lighting and temperature, and alteration due to oxygen and bacteria in the air.・ In addition to preventing rot, it also protects against external impacts caused by transport handling. In addition, the beautification display function is an important function for white paperboard, which is an individual packaging material, in order to increase the customer's willingness to purchase. This requires printability that enables white and beautiful printing on the surface, and processability such as varnish and press coat for improving the display effect. Paperboard printing is moving toward more colors and higher grades in consideration of beautification and display effects.Especially for coated products, offset printing is replaced by gravure printing, which produces finer prints, and character / graphic printing is replaced by half-printing. It is rapidly changing to toned photo printing.

The ink-jet recording medium of the present invention comprises an ink-jet recording medium comprising at least one ink-receiving layer provided on a support having two or more layers, and a mirror surface heated while the ink-receiving layer is in a wet state. This is a so-called cast treatment that finishes by pressing against a roll and drying.

As the ink receiving layer in the present invention, conventionally known constitutions of various ink receiving layers can be used.
That is, one configuration is an ink receiving layer mainly containing a porous pigment and an aqueous adhesive.

Examples of the porous pigment of the present invention include porous synthetic amorphous silica, porous calcium carbonate, porous magnesium carbonate, and porous alumina (pseudo-boehmite, δ-alumina). High porous synthetic amorphous silica is preferred. Such a synthetic amorphous silica is a microporous, irregular fine particle having a three-dimensional structure of SiO2 formed by gelation of silicic acid, and has a pore diameter of 10%.
About 2000 Å.

As such a synthetic amorphous silica, a commercially available one can be suitably used. For example, Mizukasil P-
526, Mizukacil P-801, Mizukasil NP-8,
Mizukacil P-802, Mizukasil P-802Y, Mizukasil C-212, Mizukacil P-73, Mizukacil P
-78A, Mizukacil P-78F, Mizukacil P-8
7, Mizukacil P-705, Mizukasil P-707, Mizukasil P-707D, Mizukasil P-709, Mizukasil C-402, Mizukasil C-484 (all manufactured by Mizusawa Chemical), Toksil U, Toksil UR, Toksil G
U, Toksil AL-1, Toksil GU-N, Toksil N, Toksil NR, Toksil PR, Solex, Fine Seal E-50, Fine Seal T-3
2, Fine Seal X-37, Fine Seal X-7
0, Fine Seal RX-70 Fine Seal A, Fine Seal B (all manufactured by Tokuyama), Carplex F
PS-101, carplex CS-7, carplex 80, carplex XR, carplex 67 (all manufactured by Shionogi & Co., Ltd.), thyroid 63, thyroid 6
5, thyroid 66, thyroid 77, thyroid 7
4, thyroid 79, thyroid 404, thyroid 6
20, thyroid 800, thyroid 150, thyroid 244, and thyroid 266 (all manufactured by Fuji Silysia Chemical Ltd.).

Examples of the aqueous adhesive of the present invention include starch derivatives such as starch, oxidized starch, cationized starch, etherified starch, and phosphated starch, carboxymethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose and cellulose sulfate. Cellulose derivatives, polyvinyl alcohol of various degrees of saponification or silanol modified products thereof, carboxylated products, various derivatives such as cationized products, casein, gelatin, modified gelatin, natural polymers such as soy protein, polyvinylpyrrolidone, sodium polyacrylate, styrene- Water-soluble synthetic polymers such as maleic anhydride copolymer sodium salt and polystyrene sodium sulfonate are used. Styrene-
Butadiene copolymer, conjugated diene copolymer latex such as methyl methacrylate-butadiene copolymer, acrylic polymer latex such as polymer or copolymer of acrylate and methacrylate, ethylene-
Vinyl-based polymer latex such as vinyl acetate copolymer, vinyl chloride-vinyl acetate copolymer, or functional group-modified polymer latex with functional group-containing monomer such as carboxy group of these polymers, polyurethane resin Thermosetting synthetic resins such as latex, melamine resin, and urea resin can be used.

The amount of the aqueous adhesive to be added to the porous inorganic pigment is 3 parts by weight based on 100 parts by weight of the total solid content of the pigment.
To 70 parts by weight, preferably 5 to 50 parts by weight,
If the amount is less than the weight part, the coating strength of the ink receiving layer is insufficient,
If the amount exceeds 70 parts by weight, the ink absorbency decreases.

Further, in the ink absorbing layer, as an additive,
Dye fixing agents (various cationic resins), pigment dispersants, thickeners, flow improvers, defoamers, defoamers, release agents, sizing agents, penetrants, coloring dyes, coloring pigments, fluorescent whitening Agents, ultraviolet absorbers, antioxidants, preservatives, anti-binders, wet strength enhancers, dry strength enhancers, and the like can also be appropriately compounded.

In particular, a secondary amine which forms a salt insoluble with a sulfonic acid group, a carboxyl group, an amino group or the like in a water-soluble direct dye or a water-soluble acid dye which is a dye component of an aqueous ink,
When a cationic dye fixing agent comprising a quaternary amine and a quaternary ammonium salt is blended, the dye is captured in the ink receiving layer, so that the color is improved. In addition, the formation of an insoluble salt is preferable because the destruction of recording due to the dye or pigment in the ink flowing out of the ink receiving layer due to dripping of water or moisture absorption is suppressed.

In the present configuration, if the amount of the ink receiving layer applied is too small, not only will there be a problem in the ink absorbency, but also the image density, color and sharpness will be low, and the ink will not spread in the surface direction of the ink receiving layer. The dot shape is deteriorated, called feathering, which is diffused and jagged like a bird. Further, if the coating amount is too large, the drying load in the drying step after coating increases, and not only does the productivity decrease due to a decrease in the coating speed, but also the coating composition constituting the ink receiving layer in drying under a high load. The adhesive inside moves to the surface of the ink receiving layer together with the solvent that evaporates, and reduces the amount of voids on the surface. From such a viewpoint, the coating amount of the ink receiving layer is preferably from 1 to 30 g / m ² . In addition, the ink receiving layer can be applied in a certain application amount by dividing the application amount into several times. In order to impart gloss, the gloss is improved as compared with the case where the application amount is applied all at once.

The method for applying the ink-receiving layer is as follows: various apparatuses such as a blade coater, a roll coater, an air knife coater, a bar coater, a rod blade coater, a curtain coater, a short dwell coater, and a size press are on-machine or off-machine. Can be used. Coating with a curtain coater which can provide a coating layer having a uniform thickness without coating unevenness is particularly preferable. or,
After the application, it is possible to use a calender such as a machine calender, a TG calender, a super calender, and a soft calender to flatten and impart gloss.

When the ink receiving layer is applied, the ink receiving layer may be provided on the support as it is, or a known surface activation treatment such as a corona treatment, a flame treatment, a plasma treatment, or an ultraviolet irradiation treatment may be performed. It can be applied later.

As a method of casting the ink receiving layer, there are a direct method, a gelling method and a rewetting method. Among them, the direct method is to apply a high gloss finish by pressing the coating layer onto a heated mirror drum while the coating layer applied on the support is still wet. In the gelation method, while the coating layer applied on the support is still in a wet state, the coating layer is brought into contact with a gelling agent bath, and the coating layer in the wet gel state is heated to a mirror surface of a heated mirror drum. To perform a high gloss finish. Furthermore, in the rewetting method, after a wet state coating layer is once dried, this coating layer is brought into contact with a rewetting liquid, and the wet state coating layer is pressed against a heated mirror-surface drum to give a high gloss finish. Is performed.

When the method of cast coated paper is adopted,
When any of the above three methods is selected, the moisture of the coating layer evaporates from the back surface of the support. Therefore, it is necessary to select a paper support having moisture permeability as the support.

Another structure of the ink-receiving layer used in the present invention is that a gloss-developing layer composed of a coating composition containing a pigment and an adhesive as a main component is applied on the ink-receiving layer. This is a method of performing a casting process while in a wet state. In order to obtain a glossy layer in a wet state,
There are a method in which the gloss-generating layer is cast immediately after coating, and a method in which the gloss-generating layer is once dried and then brought into a wet state by bringing the coating layer into contact with a rewetting liquid.

As the pigment contained in the glossy layer, one or more known pigments can be used in order to improve the ink absorption and the color reproducibility of the ink. For example, light calcium carbonate, heavy calcium carbonate, magnesium carbonate, magnesium hydroxide, kaolin, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc sulfide, zinc carbonate, satin white, aluminum silicate,
Diatomaceous earth, calcium silicate, magnesium silicate, synthetic amorphous silica, colloidal silica, alumina, colloidal alumina, pseudoboehmite, aluminum hydroxide, lithopone, zeolite, hydrohaloysite, inorganic pigments such as magnesium hydroxide, styrene-based plastic pigments, Organic pigments such as acrylic plastic pigments, polyethylene, microcapsules, urea resins, melamine resins, and the like. Among them, colloid particles having an average particle diameter of 300 nm or less are preferable.

The colloid particles preferably applied to the glossy layer of the present invention preferably have a porous structure made of amorphous silica or alumina having an average particle diameter of 300 nm or less. The colloid particles are supplied in a suspended and dispersed form, and have a porous structure having a structure of secondary particles or more in which amorphous silica or alumina having a primary particle diameter of several nm or less, preferably 1 nm or less forms a network. is there. In the case of forming a glossy layer in combination with another pigment, 5 parts by weight, preferably 10 parts by weight or more of the colloid particles is used based on 100 parts by weight of the total pigment in the glossy layer. .

Further, in the colloid particles applied to the glossy layer of the present invention, cationic colloid particles are more preferable, and the cationic colloid particles are suspended and dispersed in water to form a colloid. The average particle diameter in the colloidal state measured by the dynamic light scattering method is 30.
0 nm or less, refers to particles whose particle surface is positively charged, for example, boehmite, alumina sol such as pseudo-boehmite or colloidal alumina, or the surface of colloidal silica particles as disclosed in JP-B-47-26959. And the like coated with alumina. If the average particle diameter exceeds 300 nm, the surface area of the colloidal particles decreases, so that the fixability of the ink decreases, and it becomes necessary to increase the coating amount of the glossy layer.

That is, since the charge on the particle surface is a cation, it becomes possible to fix the dye component in the ink on the glossy layer by electric interaction. Furthermore, since the colloid particles themselves do not have the capacity to absorb the solvent component, the solvent component penetrates the glossy layer,
It will penetrate the ink receiving layer. If the permeation of the solvent component in the ink receiving layer is slow, the ink will stay in the glossy layer and the ink will be diffused, so that the permeation of the solvent component must be fast.

Examples of the adhesive contained in the glossy layer include natural polymers such as casein, gelatin and soybean protein, starch derivatives such as etherified starch and phosphorylated ester, carboxycellulose and hydroxyethylcellulose. Natural derivatives such as cellulose derivatives such as cellulose derivatives thereof, and various derivatives such as polyvinyl alcohol or silanol modified products thereof, carboxyl modified products, cation modified products thereof having various degrees of saponification, polyethylene oxide, polyethylene glycol, polyacrylamide, polyvinyl pyrrolidone, etc. Water-soluble polymer, melamine resin, urea resin,
Various water-soluble synthetic polymers such as polyurea polyamide resins and derivatives thereof such as carboxyl-modified, amide-modified, and cation-modified, and styrene-butadiene-based, acrylate and methacrylate-based, ethylene-vinyl acetate-based, Examples include synthetic polymer emulsions such as polyurethanes, latexes and modified derivatives such as carboxyls, amides, and cations modified with various amine groups.

The mixing ratio of the adhesive in the glossy layer is as follows:
It is usually 5 to 70 parts by weight, preferably 5 to 50 parts by weight, based on 100 parts by weight of the pigment. If the mixing ratio of the adhesive to 100 parts by weight of the pigment is less than 5 parts by weight, the strength of the glossy layer may be insufficient. On the other hand, if the above mixing ratio is more than 70 parts by weight, the ink absorbency may be reduced and good image quality may not be obtained.

For the application of the glossy layer, for example, various blade coaters, roll coaters, bar coaters, rod blade coaters, curtain coaters, short dwell coaters,
Various devices such as a size press can be used.

The application amount of the glossy layer is difficult to determine unconditionally because it varies depending on the smoothness and size of the ink-receiving layer, required smoothness, and the like, but is usually 2 g / g.
m ² or more is sufficient. After the casting of the glossy layer, humidified air or humidified steam may be blown on the back surface to perform curl correction.
Calendar processing using a calendar, a super calendar, a soft calendar, or the like may be performed.

With the above-described configuration, an ink jet recording medium for calibration similar to white paperboard having a glossy ink receiving layer can be obtained. This is high in glossiness and is preferable for proofing when printing on paper containers using high-quality white paperboard or when performing varnish / press coating.

In the ink jet recording medium of the present invention, the basis weight is preferably 180 g / m ² or more.
200 g / m ² or more 800 g / m ² or less is particularly preferred. If the basis weight is 180 g / m ² or more, the final product can be realized by actually cutting and assembling the proof-printed recording medium into a box shape.

The color difference referred to in the present invention is JIS-Z872
2, and according to JIS-Z8720, a color measurement method and a measurement light source defined in JIS-Z8720.
Lightness index (L ^* ) and perceived chromaticity index (a ^* ,
b ^* ) and the values of the lightness index (L ^* ) and the perceived chromaticity index (a ^* , b ^* ) of the printing paper to be calibrated, according to JIS-Z87.
The color difference (ΔE ^* ) defined by 30 is calculated. More specifically, the measurement conditions are D-nP, (JIS
-See Z.3.22 in Z8722), the light source was standard light D
The color difference (ΔE ^* ) was calculated by the following equation.

[0048]

ΔE ^* = [(ΔL ^* ) ² + (Δa ^* ) ² + (Δb ^* ) ² ] ^1/2

In the ink jet recording medium of the present invention, the color difference between the surface of the ink receiving layer and the surface of the target printing paper (Δ
E ^* ) in order to make ΔE ^* ≦ 3,
This is achieved by adding various colorants to at least one of the support of the ink jet recording medium and the ink receiving layer. Especially when a colorant is contained in the ink receiving layer,
The lightness and chromaticity of the color are easily controlled, and the effect of the present invention is further enhanced.

As the colorant in the ink jet recording medium of the present invention, a dye colorant and a pigment colorant can be used, but from the viewpoint of the preservation of the color tone of the recording medium, a pigment colorant is used. Is particularly preferred.

Examples of the coloring agent to be added include azo compounds (dithizone, formazan), quinones (naphthoquinone, anthraquinone, acridone, anthantrone, indanthrene, pyrendione, biolanthrone), quinone imines (azine, oxazine, thiazine), Indigo dye (indirubin, oxyindigo,
Thioindigo), sulfur dyes, diphenylmethane, triphenylmethane (fluorane, fluorescein, rhodamine), ferrocene, fluorenone, fulgide, perylene, phenazine, phenothiazine, polyene (carotene, maleic acid derivative, pyrrazozone, stilbene, styryl), polymethine (cyanine, Pyridinium, pyrylium, quinolinium, rhodanine), xanthene, alizarin, acridine, acridinone, carbostyril,
Coumarin, diphenylamine, quinacridone, quinophthalone, phenoxazine, phthaloperinone, porphine,
Dye-based colorants such as chlorophyll, phthalocyanine, crown compound, squarylium, thiafulvalene, thiazole, nitro dye, nitroso dye, leuco dye after coloring, or titanium black, titanium yellow, ultramarine, navy blue, cobalt blue, carbon black, iron Black, zinc oxide, cobalt oxide, silicon oxide, aluminum hydroxide,
Azo pigments, phthalocyanine pigments, dye lakes, starch, urea-formalin resin, synthetic resin particles such as melamine resin, pigment colorants such as silicone particles, stilbene, distilbene, benzoxazole, coumarin, imidazole, benzo Examples include, but are not limited to, imidazole-based and pyrazoline-based fluorescent dyes.

In order to adjust the lightness and chromaticity of the above colorants, diatomaceous earth, clay, calcined clay, talc, kaolin, calcined kaolin, calcium carbonate, magnesium carbonate, titanium dioxide, titanium dioxide-coated mica, barium sulfate , Molybdenum white, zinc white, lithopone, zinc sulfide, gypsum, lead white and the like can be used in combination.

These colorants can be used alone or in combination of two or more. The mixing ratio between the dye and the pigment may be any ratio as long as color unevenness does not occur.

The concentration of the colorant may be any concentration as long as the desired color can be obtained. However, when it is added to the support, it is usually 0.001 to 0.005 to the pulp.
1% by weight, and when added to the ink receiving layer, usually 0.001 to 0.005% by weight of the total solid content in the ink receiving layer.
1% used.

The present invention also includes an embodiment in which the ink receiving layers are provided on both sides. In this case, if the target printing paper has the same configuration on both sides, it is preferable that the inkjet recording medium has the same configuration, and if the configuration differs on each side, it is preferable that the inkjet recording medium has a configuration adapted to each side thereof. By doing so, both sides can be used for print proofreading, and there are advantages such as economical low cost, a configuration close to the actual printed matter, and a close touch to the touch.

The ink referred to in the present invention includes the following colorants:
This is a recording liquid composed of a liquid medium and other additives.

Examples of the coloring agent include direct dyes, acid dyes, basic dyes, reactive dyes, and water-soluble dyes such as food dyes.

As a solvent for the ink, for example, water and various water-soluble organic solvents such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol, tert-butyl alcohol, Alkyl alcohols having 1 to 4 carbon atoms such as isobutyl alcohol; amides such as dimethylformamide and dimethylacetamide; ketones or ketone alcohols such as acetone and diacetone alcohol; ethers such as tetrahydrofuran and dioxane; polyethylene glycol and polypropylene glycol Polyalkylene glycols such as ethylene glycol, propylene glycol, butylene glycol, triethylene glycol, 1,2,6-hexanetriol, thiodiglycol; Recall, hexylene glycol, an alkylene group such as diethylene glycol 2
And 6 alkylene glycols; lower alkyl ethers of polyhydric alcohols such as glycerin, ethylene glycol methyl ether, diethylene glycol methyl (or ethyl) ether, and triethylene glycol monomethyl ether. Among these many water-soluble organic solvents, polyhydric alcohols such as diethylene glycol, and lower alkyl ethers of polyhydric alcohols such as triethylene glycol monomethyl ether and triethylene glycol monoethyl ether are preferable.

Other additives include, for example, a pH adjuster, a metal sequestering agent, an antioxidant, a fungicide, a viscosity adjuster, a surface tension adjuster, a wetting agent, a surfactant, and a rust inhibitor. No.

[0060]

EXAMPLES The present invention will be described below in detail with reference to examples, but the contents of the present invention are not limited to these examples.
Further, “parts” and “%” shown in the examples are parts by weight and% by weight unless otherwise specified.

<Ink Absorbing Layer A Coating Liquid> Ink Absorbing Layer A
Is a synthetic amorphous silica (FINE SEAL X
-37B, average particle size 3.5 μm: manufactured by Tokuyama Corporation) 10
0 parts, polyvinyl alcohol (PVA117: Kuraray) 30 parts, colloidal silica (Snowtex-O:
Using 30 parts of Nissan Chemical Industries, Ltd. and 20 parts of a cationic dye fixing agent (Sumirez Resin 1001: Sumitomo Chemical Co., Ltd.)
These were prepared at a solid concentration of 15%.

<Ink Absorbing Layer B Coating Liquid> Ink Absorbing Layer B
Is a synthetic amorphous silica (Mizukasil P-7)
8F, average particle diameter 12 μm: manufactured by Mizusawa Chemical Industries) 80
Parts, synthetic amorphous silica (Fine Seal X-37B, average particle size 3.5 μm: manufactured by Tokuyama Corporation) 20 parts, polyvinyl alcohol (PVA117: manufactured by Kuraray Co., Ltd.) 30 parts, colloidal silica (Snowtex-O: Nissan Chemical 30 parts of cationic dye fixing agent (Violet Resin 1)
001: manufactured by Sumitomo Chemical Co., Ltd.) and a solid concentration of 15
These were prepared as%.

<Coating solution for glossy layer> The coating composition for the glossy layer was 100 parts of colloidal silica (Snowtex YL: manufactured by Nissan Chemical Industries, Ltd.) having an average particle diameter of 65 nm as colloid particles, and an adhesive. Styrene-butadiene-based latex (0693; average particle diameter 135 nm; manufactured by Nippon Synthetic Rubber Co., Ltd.), and 30 parts of a commercially available potassium oleate as a release agent were prepared at a solids concentration of 25%. .

Example 1 An ink-absorbing layer A coating solution was applied onto a base paper having a basis weight of 83 g / m ² by an air knife coater to a dry coating amount of 10 g / m ^2.
The coated base paper was coated on one side so as to obtain m ^2, and after 2 seconds, cast by a direct method in which it was pressed against a mirror-surface roll heated to a surface temperature of 90 ° C. and dried. Then, the grammage 1
Example 1 A 60 g / m ² Pearl Deluxe base paper (Mitsubishi Paper, special white paperboard base paper) was laminated by laminating the back side of the paper provided with the ink receiving layer with an aqueous adhesive (vinyl acetate emulsion paste). Thus, No. 1 inkjet recording medium was obtained.

Example 2 Instead of the water-based adhesive used for lamination in Example 1, lamination was performed by laminating with a solvent-based adhesive (a styrene-butadiene synthetic rubber dissolved in normal hexane). I got the medium.

Example 3 In place of the water-based adhesive used for bonding in Example 1, low-density polyethylene was melt-extruded to a thickness of 10 using a die.
The ink was extruded to a thickness of μm, and high-quality paper having a basis weight of 100 g / m ² was attached and laminated in place of the Pearl Deluxe base paper to obtain an ink jet recording medium of Example 3.

Comparative Example 1 An ink jet recording medium of Comparative Example 1 was obtained in the same manner as in Example 1 except that the cast treatment of Example 1 was not performed and drying was performed by hot air.

Comparative Example 2 An ink jet recording medium of Comparative Example 2 was obtained in the same manner as in Example 1 except that lamination was not performed on the pearl deluxe base paper of Example 1.

Example 4 0.024 parts of a blue dye coloring agent (Bleu B: manufactured by Nippon Kayaku) and a purple dye coloring agent (TB1548 violet: manufactured by Dainichi Seika Co., Ltd.) based on 100 parts of the pigment of the coating liquid for the ink absorbing layer A ) 0.00
An ink jet recording medium of Example 4 was obtained in the same manner as in Example 1 except that the coating liquid to which 12 parts were added was used.

Example 5 Instead of the water-based adhesive used for bonding in Example 4, it was laminated with a solvent-based adhesive (a glue of styrene-butadiene synthetic rubber dissolved in normal hexane) and laminated. I got the medium.

Example 6 In place of the water-based adhesive used for laminating in Example 4, low-density polyethylene was melt-extruded to a thickness of 10 using a die.
Extruded to a thickness of μm, and high-quality paper having a basis weight of 100 g / m ² was laminated and laminated in place of the Pearl Deluxe base paper to obtain an ink jet recording medium of Example 6.

Example 7 On the opposite side of the ink jet recording medium of Example 5, the cast treated coated paper used for lamination in Example 4 was also coated with a solvent-based adhesive (dissolved in normal hexane of styrene-butadiene synthetic rubber). The two-sided ink jet recording medium of Example 7 was used as a double-sided ink jet recording medium.

Comparative Example 3 An ink jet recording medium of Comparative Example 3 was obtained in the same manner as in Example 4 except that drying was performed by hot air without performing the casting treatment of Example 4.

Comparative Example 4 An ink jet recording medium of Comparative Example 4 was obtained in the same manner as in Example 4 except that lamination on the pearl deluxe base paper of Example 4 was not performed.

Example 8 An ink-absorbing layer B coating liquid was applied to a base paper having a basis weight of 83 g / m ² by an air knife coater to dry the coated amount of 10 g / m ^2.
The coated base paper was coated on one side so as to obtain m ^2, and after 2 seconds, cast by a direct method in which it was pressed against a mirror-surface roll heated to a surface temperature of 90 ° C. and dried. Then, the grammage 1
Example 1 A 60 g / m ² Pearl Deluxe base paper (Mitsubishi Paper, special white paperboard base paper) was laminated by laminating the back side of the paper provided with the ink receiving layer with an aqueous adhesive (vinyl acetate emulsion paste). 8 ink-jet recording media were obtained.

Example 9 Instead of the water-based adhesive used for lamination in Example 8, lamination was performed by laminating with a solvent-based adhesive (a glue of styrene-butadiene synthetic rubber dissolved in normal hexane). I got the medium.

Example 10 In place of the water-based adhesive used for lamination in Example 8, low-density polyethylene was melt-extruded to a thickness of 10 using a die.
Extrusion was carried out to a thickness of μm, and high-quality paper having a basis weight of 100 g / m ² was laminated and laminated in place of the Pearl Deluxe base paper to obtain an ink jet recording medium of Example 10.

Comparative Example 5 An ink jet recording medium of Comparative Example 5 was obtained in the same manner as in Example 8 except that drying was performed by hot air without performing the casting treatment of Example 8.

Comparative Example 6 An ink jet recording medium of Comparative Example 6 was obtained in the same manner as in Example 8, except that lamination was not performed on the pearl deluxe base paper.

Example 11 0.024 parts of a blue dye colorant (Bleu B: manufactured by Nippon Kayaku) and a violet dye colorant (TB1548 violet: manufactured by Dainichi Seika) were added to 100 parts of the pigment of the coating liquid for the ink absorbing layer B. ) 0.00
An ink jet recording medium of Example 11 was obtained in the same manner as in Example 8, except that the coating liquid to which 12 parts were added was used.

Example 12 In place of the water-based adhesive used for bonding in Example 11,
The resultant was laminated with a solvent-based adhesive (a styrene-butadiene synthetic rubber dissolved in normal hexane) to obtain an ink jet recording medium of Example 12.

Example 13 In place of the water-based adhesive used for laminating in Example 11,
Low-density polyethylene is melt-extruded to a thickness of 1 using a die.
Extrusion was performed so as to have a thickness of 0 μm, and high-quality paper having a basis weight of 100 g / m ² was attached and laminated in place of the Pearl Deluxe base paper to obtain an ink jet recording medium of Example 13.

Example 14 On the opposite side of the ink jet recording medium of Example 12, the cast treated coated paper used for lamination in Example 11 was also coated with a solvent-based adhesive (a glue of styrene-butadiene synthetic rubber dissolved in normal hexane). The two-sided ink jet recording medium of Example 14 was used as a double-sided ink jet recording medium.

Comparative Example 7 An ink jet recording medium of Comparative Example 4 was obtained in the same manner as in Example 11, except that drying was performed by hot air without performing the casting treatment of Example 11.

Comparative Example 8 An ink jet recording medium of Comparative Example 8 was obtained in the same manner as in Example 11 except that lamination on the pearl deluxe base paper of Example 11 was not performed.

Example 15 An ink-absorbing layer A coating liquid was applied to a base paper having a basis weight of 76 g / m ² by an air knife coater to dryly apply 8 g / m 2.
² is coated and dried on one side of the coated base paper, and then a gloss developing layer coating liquid is coated thereon with an air knife coater to a dry coating amount of 4 g / m ^2, and after 2 seconds, It was treated by a direct method of pressing against a mirror roll heated to a surface temperature of 90 ° C. and drying. Then, basis weight 190g /
^On the coated side of m2 N Pearl Deluxe (Mitsubishi Paper Co., Ltd., special white paperboard single-sided coated product), the back surface of the paper provided with the ink receiving layer and the gloss developing layer is coated with an aqueous adhesive (10% polyvinyl alcohol solution). The ink-jet recording medium of Example 15 was obtained by laminating and laminating.

Example 16 In place of the water-based adhesive used for bonding in Example 15,
The resultant was laminated with a solvent-based adhesive (a glue of styrene-butadiene synthetic rubber dissolved in normal hexane) to obtain an inkjet recording medium of Example 16.

Example 17 In place of the water-based adhesive used for lamination in Example 15,
Low-density polyethylene is melt-extruded to a thickness of 1 using a die.
It was extruded so as to have a thickness of 0 μm, and high-quality paper having a basis weight of 100 g / m ² was bonded and laminated in place of N Pearl Deluxe to obtain an ink jet recording medium of Example 17.

Comparative Example 9 An ink jet recording medium of Comparative Example 9 was obtained in the same manner as in Example 15 except that the cast treatment of Example 15 was not performed and drying was performed by hot air.

Comparative Example 10 An ink jet recording medium of Comparative Example 10 was obtained in the same manner as in Example 15 except that the lamination on N Pearl Deluxe was not performed.

Example 18 0.032 parts of a blue dye coloring agent (Bleu B: manufactured by Nippon Kayaku) and a purple dye coloring agent (TB1548 violet: manufactured by Dainichi Seika) were used for 100 parts of the pigment of the coating liquid for the ink absorbing layer A. ) 0.00
Example 15 was repeated except that a coating solution to which 24 parts were added was used.
In the same manner as in the above, an inkjet recording medium of Example 18 was obtained.

Example 19 In place of the water-based adhesive used for bonding in Example 18,
The resultant was laminated with a solvent-based adhesive (a glue of styrene-butadiene synthetic rubber dissolved in normal hexane) to obtain an inkjet recording medium of Example 19.

Example 20 In place of the water-based adhesive used for bonding in Example 18,
Low-density polyethylene is melt-extruded to a thickness of 1 using a die.
The ink jet recording medium of Example 20 was obtained by extruding to a thickness of 0 μm and laminating and laminating high-quality paper having a basis weight of 100 g / m ² instead of N Pearl Deluxe.

Example 21 On the opposite side of the ink jet recording medium of Example 19, a double-sided ink jet recording medium was similarly laminated to obtain an ink jet recording medium of Example 21.

Comparative Example 11 An ink jet recording medium of Comparative Example 11 was obtained in the same manner as in Example 18, except that drying was performed by hot air without performing the casting treatment of Example 18.

Comparative Example 12 An ink jet recording medium of Comparative Example 12 was obtained in the same manner as in Example 18 except that lamination on N Pearl Deluxe was not performed.

Example 22 A coating solution of the ink absorbing layer B was applied to a base paper having a basis weight of 76 g / m ₂ by an air knife coater to obtain a dry coating amount of 8 g / m 2.
² is coated and dried on one side of the coated base paper, and then a gloss developing layer coating liquid is coated thereon with an air knife coater to a dry coating amount of 4 g / m ^2, and after 2 seconds, It was treated by a direct method of pressing against a mirror roll heated to a surface temperature of 90 ° C. and drying. Then, basis weight 190g /
^On the coated side of m2 N Pearl Deluxe (Mitsubishi Paper Co., Ltd., special white paperboard single-sided coated product), the back surface of the paper provided with the ink receiving layer and the gloss developing layer is coated with an aqueous adhesive (10% polyvinyl alcohol solution). The resultant was laminated and laminated to obtain an ink jet recording medium of Example 22.

Example 23 In place of the water-based adhesive used for bonding in Example 22,
The resultant was laminated with a solvent-based adhesive (a glue of styrene-butadiene synthetic rubber dissolved in normal hexane) to obtain an ink jet recording medium of Example 23.

Example 24 In place of the water-based adhesive used for bonding in Example 22,
Low-density polyethylene is melt-extruded to a thickness of 1 using a die.
It was extruded to a thickness of 0 μm, and high-quality paper having a basis weight of 100 g / m ² was attached and laminated in place of N Pearl Deluxe to obtain an ink jet recording medium of Example 24.

Comparative Example 13 An ink jet recording medium of Comparative Example 13 was obtained in the same manner as in Example 22 except that drying was performed by hot air without performing the casting process of Example 22.

Comparative Example 14 An ink jet recording medium of Comparative Example 14 was obtained in the same manner as in Example 22 except that lamination on N Pearl Deluxe was not performed.

Example 25 0.032 parts of a blue dye coloring agent (Bleu B: manufactured by Nippon Kayaku) and a purple dye coloring agent (TB1548 violet: manufactured by Dainichi Seika Co., Ltd.) were used for 100 parts of the pigment of the coating liquid for the ink absorbing layer B. ) 0.00
Example 22 was repeated except that a coating solution to which 24 parts were added was used.
In the same manner as in the above, an ink jet recording medium of Example 25 was obtained.

Example 26 In place of the water-based adhesive used for bonding in Example 25,
The resultant was laminated with a solvent-based adhesive (a glue of styrene-butadiene synthetic rubber dissolved in normal hexane) to obtain an ink jet recording medium of Example 26.

Example 27 In place of the water-based adhesive used for bonding in Example 25,
Low-density polyethylene is melt-extruded to a thickness of 1 using a die.
It was extruded to a thickness of 0 μm, and high-quality paper having a basis weight of 100 g / m ² was bonded and laminated in place of N Pearl Deluxe to obtain an ink jet recording medium of Example 27.

Example 28 On the opposite side of the ink jet recording medium of Example 26, a double-sided ink jet recording medium was similarly laminated to obtain an ink jet recording medium of Example 28.

Comparative Example 15 An ink jet recording medium of Comparative Example 15 was obtained in the same manner as in Example 25, except that drying was performed by hot air without performing the casting process of Example 25.

Comparative Example 16 An ink jet recording medium of Comparative Example 16 was obtained in the same manner as in Example 25 except that the lamination on N Pearl Deluxe was not performed.

Example 29 A coating solution of the ink absorbing layer A was applied on a base paper having a basis weight of 76 g / m ² by an air knife coater to a dry coating amount of 8 g / m 2.
^2. Coat and dry one side of the coated base paper so as to obtain ^{2. Then} , apply and dry the gloss developing layer coating solution on it using an air knife coater to a dry coating amount of 4 g / m ² and receive ink. A layer was formed. Next, water is applied to the ink receiving layer to re-wet the ink receiving layer.
Casting was performed by a rewetting method in which a mirror roll heated to 0 ° C. was pressed against and dried. Then, basis weight 190g /
^On the coated surface of m2 N Pearl Deluxe (Mitsubishi Paper Co., Ltd., special white paperboard single-sided coated product), the back side of the paper provided with the above-described ink-receiving layer subjected to the cast treatment is adhered with an aqueous adhesive (10% polyvinyl alcohol solution). The resultant was laminated together to obtain the ink jet recording medium of Example 29.

Example 30 In place of the water-based adhesive used for bonding in Example 29,
It was laminated with a solvent-based adhesive (a glue of styrene-butadiene synthetic rubber dissolved in normal hexane) to obtain an inkjet recording medium of Example 30.

Example 31 In place of the aqueous adhesive used for laminating in Example 29,
Low-density polyethylene is melt-extruded to a thickness of 1 using a die.
Extrusion was performed so as to have a thickness of 0 μm, and high-quality paper having a basis weight of 100 g / m ² was laminated and laminated in place of N Pearl Deluxe to obtain an inkjet recording medium of Example 31.

Comparative Example 17 An ink jet recording medium of Comparative Example 17 was obtained in the same manner as in Example 29, except that lamination on N Pearl Deluxe was not performed.

Example 32 0.032 parts of a blue dye colorant (Bleu B: manufactured by Nippon Kayaku) and a purple dye colorant (TB1548 Violet: manufactured by Dainichi Seika) were used for 100 parts of the pigment of the coating liquid for the ink absorbing layer A. ) 0.00
Example 29 was repeated except that a coating solution to which 24 parts were added was used.
In the same manner as in the above, an inkjet recording medium of Example 32 was obtained.

Example 33 In place of the water-based adhesive used for bonding in Example 32,
The resultant was laminated with a solvent-based adhesive (a glue of styrene-butadiene synthetic rubber dissolved in normal hexane) to obtain an inkjet recording medium of Example 33.

Example 34 In place of the water-based adhesive used for bonding in Example 32,
Low-density polyethylene is melt-extruded to a thickness of 1 using a die.
It was extruded to a thickness of 0 μm, and high-quality paper having a basis weight of 100 g / m ² was laminated and laminated instead of N Pearl Deluxe to obtain an ink jet recording medium of Example 34.

Example 35 The ink-jet recording medium of Example 35 was obtained by laminating the ink-jet recording medium of Example 32 on the opposite side in the same manner to form a double-sided ink-jet recording medium.

Comparative Example 18 An ink jet recording medium of Comparative Example 18 was obtained in the same manner as in Example 32 except that lamination on N Pearl Deluxe was not performed.

Example 36 An ink-absorbing layer B coating solution was applied to a base paper having a basis weight of 76 g / m ² by an air knife coater to obtain a dry coating amount of 8 g / m 2.
^2. Coat and dry one side of the coated base paper so as to obtain a coating material, and then apply and dry the coating solution for glossy layer with an air knife coater to a dry coating amount of 4 g / m ² to receive ink. A layer was formed. Next, water is applied to the ink receiving layer to re-wet the ink receiving layer.
Casting was carried out by a rewetting method in which the roll was pressed against a mirror roll heated to 0 ° C. and dried. Then, basis weight 190g /
^On the coated side of m2 N Pearl Deluxe (Mitsubishi Paper, special white paperboard single-sided coated product), the back side of the paper provided with the above-mentioned ink-receiving layer subjected to the cast treatment is adhered with an aqueous adhesive (10% polyvinyl alcohol solution). The resultant was laminated together to obtain an ink jet recording medium of Example 35.

Example 37 In place of the water-based adhesive used for bonding in Example 36,
The resultant was laminated with a solvent-based adhesive (a glue of styrene-butadiene synthetic rubber dissolved in normal hexane) to obtain an ink jet recording medium of Example 37.

Example 38 In place of the water-based adhesive used for bonding in Example 36,
Low-density polyethylene is melt-extruded to a thickness of 1 using a die.
It was extruded to a thickness of 0 μm, and high-quality paper having a basis weight of 100 g / m ² was attached and laminated in place of N Pearl Deluxe to obtain an ink jet recording medium of Example 38.

Comparative Example 19 An ink jet recording medium of Comparative Example 19 was obtained in the same manner as in Example 36, except that lamination on N Pearl Deluxe was not performed.

Example 39 0.032 parts of a blue dye colorant (Bleu B: manufactured by Nippon Kayaku) and a purple dye colorant (TB1548 Violet: manufactured by Dainichi Seika) were added to 100 parts of the pigment of the ink absorbing layer B coating liquid. ) 0.00
Example 36 was repeated except that 24 parts of the coating liquid was used.
In a similar manner to Example 39, an inkjet recording medium was obtained.

Example 40 The water-based adhesive used for laminating in Example 39 was replaced with
The resultant was laminated with a solvent-based adhesive (a styrene-butadiene synthetic rubber dissolved in normal hexane) to obtain an ink jet recording medium of Example 40.

Example 41 In place of the water-based adhesive used for laminating in Example 39,
Low-density polyethylene is melt-extruded to a thickness of 1 using a die.
Extrusion was performed so as to have a thickness of 0 μm, and high-quality paper having a basis weight of 100 g / m ² was bonded and laminated in place of N Pearl Deluxe to obtain an ink jet recording medium of Example 41.

Example 42 On the opposite side of the ink jet recording medium of Example 39, a double-sided ink jet recording medium was similarly laminated to obtain an ink jet recording medium of Example 42.

Comparative Example 20 An ink jet recording medium of Comparative Example 20 was obtained in the same manner as in Example 39 except that lamination on N Pearl Deluxe was not performed.

Example 43 Using a Pearl Deluxe base paper having a basis weight of 260 g / m ² (manufactured by Mitsubishi Paper Mills, special white paperboard base paper, eight-ply laminated product) as a support, the coating solution for the ink absorbing layer A was applied with an air knife coater. Example 1 Coating on one side of coated base paper so as to have a dry coating amount of 10 g / m ^2, and after 2 seconds, casting by a direct method of pressing against a mirror surface roll heated to a surface temperature of 90 ° C. and drying. Forty-three ink jet recording media were obtained.

Example 44 0.038 parts of a blue dye colorant (Bleu B: manufactured by Nippon Kayaku) and a purple dye colorant (TB1548 violet: manufactured by Dainichi Seika) were added to 100 parts of the pigment of the coating liquid for the ink absorbing layer A. ) 0.00
Example 43 was repeated except that a coating solution containing 20 parts was used.
In the same manner as in the above, an ink jet recording medium of Example 44 was obtained.

Example 45 Using a Pearl Deluxe base paper having a basis weight of 260 g / m ² (manufactured by Mitsubishi Paper Mills, special white paperboard base paper, eight-ply laminated product) as a support, the coating liquid for the ink absorbing layer B was applied with an air knife coater. Example 1 Coating on one side of coated base paper so as to have a dry coating amount of 10 g / m ^2, and after 2 seconds, casting by a direct method of pressing against a mirror surface roll heated to a surface temperature of 90 ° C. and drying. Forty-five ink jet recording media were obtained.

Example 46 0.038 parts of a blue dye colorant (Bleu B: manufactured by Nippon Kayaku) and a purple dye colorant (TB1548 Violet: manufactured by Dainichi Seika) were used for 100 parts of the pigment of the coating liquid for the ink absorbing layer B. ) 0.00
Example 43 was repeated except that a coating solution containing 20 parts was used.
In the same manner as in the above, an ink jet recording medium of Example 46 was obtained.

Example 47 An N-hyper having a basis weight of 260 g / m ² (manufactured by Mitsubishi Paper Industries, special white paperboard, eight-layer lamination using GP for the middle layer, one-side coated product) was used as a support, and the coated surface was The coating amount of the ink absorbing layer A was dried by an air knife coater to a dry coating amount of 8 g /
m ² , followed by drying, and then applying a coating liquid for the gloss-generating layer by an air knife coater to a dry coating amount of 4 m.
g / m ^2, and after 2 seconds, a surface temperature of 90
The ink-jet recording medium of Example 47 was obtained by a direct method of pressing against a mirror-surface roll heated to 0 ° C. and drying.

Example 48 A blue dye colorant (Bleu B: Nippon Kayaku) 0.038 parts and a purple dye colorant (TB1548 Violet: Dainichi Seika) were used for 100 parts of the pigment of the ink absorbing layer A coating liquid. ) 0.00
Example 47 was repeated except that a coating solution containing 20 parts was used.
In the same manner as in the above, an ink jet recording medium of Example 48 was obtained.

Example 49 An N-hyper having a basis weight of 260 g / m ² (manufactured by Mitsubishi Paper Mills, special white paperboard, eight-layer lamination using GP for the middle layer, one-side coated product) was used as a support, and the coated surface was coated. The coating amount of the ink absorbing layer B was dried with an air knife coater to a dry coating amount of 8 g /
m ² , followed by drying, and then applying a coating liquid for the gloss-generating layer by an air knife coater to a dry coating amount of 4 m.
g / m ^2, and after 2 seconds, a surface temperature of 90
The ink-jet recording medium of Example 49 was obtained by a direct method of pressing against a mirror-surface roll heated to 0 ° C. and drying.

Example 50 A colorant of blue dye (Bleu B: manufactured by Nippon Kayaku) 0.038 parts and a colorant of purple dye (TB1548 Violet: manufactured by Dainichi Seika) were added to 100 parts of the pigment of the ink absorbing layer B coating liquid. ) 0.00
Example 49 was repeated except that a coating solution containing 20 parts was used.
In the same manner as in the above, an ink jet recording medium of Example 50 was obtained.

Example 51 An N-hyper having a basis weight of 260 g / m ² (manufactured by Mitsubishi Paper Mills, special white paperboard, eight-layer lamination using GP for the middle layer, one-side coated product) was used as a support, and the coated surface thereof was used. The coating amount of the ink absorbing layer A was dried by an air knife coater to a dry coating amount of 8 g /
m ² , followed by drying, and then applying a coating liquid for the gloss-generating layer by an air knife coater to a dry coating amount of 4 m.
g / m ² and dried to form an ink receiving layer. Next, water was applied to the ink receiving layer to re-wet the ink receiving layer, and the ink receiving layer was cast by a rewetting method in which the ink receiving layer was pressed against a mirror roll heated to a surface temperature of 90 ° C. and dried to obtain an ink jet recording medium of Example 51. .

Example 52 0.038 parts of a blue dye colorant (Bleu B: manufactured by Nippon Kayaku) and a purple dye colorant (TB1548 Violet: manufactured by Dainichi Seika) were added to 100 parts of the pigment of the coating liquid for the ink absorbing layer A. ) 0.00
Example 50 was repeated except that a coating liquid to which 20 parts were added was used.
In the same manner as in the above, an ink jet recording medium of Example 51 was obtained.

Example 53 An N-hyper having a basis weight of 260 g / m ² (manufactured by Mitsubishi Paper Mills, special white paperboard, 8-layer lamination using GP for the middle layer, one-side coated product) was used as a support, and the coated surface was The coating amount of the ink absorbing layer B was dried with an air knife coater to a dry coating amount of 8 g /
m ² , followed by drying, and then applying a coating liquid for the gloss-generating layer by an air knife coater to a dry coating amount of 4 m.
g / m ² and dried to form an ink receiving layer. Next, water was applied to the ink receiving layer to re-wet the ink receiving layer, and the ink receiving layer was cast by a rewetting method in which the ink receiving layer was pressed against a mirror roll heated to a surface temperature of 90 ° C. and dried to obtain an ink jet recording medium of Example 53. .

Example 54 0.038 parts of a blue dye coloring agent (Bleu B: manufactured by Nippon Kayaku) and a purple dye coloring agent (TB1548 violet: manufactured by Dainichi Seika) were used for 100 parts of the pigment of the coating liquid for the ink absorbing layer B. ) 0.00
Example 53 was repeated except that a coating solution containing 20 parts was used.
In the same manner as in the above, an ink jet recording medium of Example 54 was obtained.

Example 55 The ink jet recording medium of Example 55 was laminated by laminating the back surfaces of the paper provided with the ink receiving layer with an aqueous adhesive (10% polyvinyl alcohol solution). And

Example 56 The ink jet recording medium of Example 46 was laminated by laminating the back surfaces of the paper provided with the ink receiving layer with a solvent-based adhesive (a glue of styrene-butadiene synthetic rubber dissolved in normal hexane). 56 ink jet recording media were used.

Example 57 The ink jet recording medium of Example 57 was laminated by laminating the back surfaces of the paper provided with the ink receiving layer with an aqueous adhesive (10% polyvinyl alcohol solution). And

Example 58 The ink jet recording medium of Example 49 was laminated by laminating the back surfaces of the paper provided with the ink receiving layer with a solvent-based adhesive (a glue of styrene-butadiene synthetic rubber dissolved in normal hexane). 58 ink jet recording media.

Example 59 The ink jet recording medium of Example 59 was laminated by laminating the back surfaces of the paper provided with the ink receiving layer with an aqueous adhesive (10% polyvinyl alcohol solution). And

Example 60 The ink jet recording medium of Example 54 was laminated by laminating the back surfaces of the paper provided with the ink receiving layer with a solvent-based adhesive (a glue of styrene-butadiene synthetic rubber dissolved in normal hexane). 60 inkjet recording media.

Comparative Example 21 An ink jet recording medium of Comparative Example 21 was obtained in the same manner as in Example 51 except that the rewet cast treatment of Example 51 was not performed at all.

Comparative Example 22 An ink jet recording medium of Comparative Example 22 was obtained in the same manner as in Example 54, except that the rewet cast treatment of Example 54 was not performed at all.

Printing Paper to be Calibrated As the paper to be calibrated, high-grade white paperboard manufactured by Mitsubishi Paper Mills, Joybory (basis weight 320 g / m ² , double-side coated product) was used.

Examples 1 to 60 and Comparative Examples 1 to 22 and the printing paper to be calibrated were evaluated by the following method.
The results are shown in Tables 1 to 4. In addition, the measurement and evaluation were performed by JI
The test was performed under the environment specified in S-P8111.

1) Glossiness The 75-degree specular glossiness was measured in accordance with JIS-P8142-193, using a variable angle glossmeter VGS-1001 manufactured by Nippon Denshoku Industries Co., Ltd.
The ink jet recording medium obtained using DP was measured.

2) Lightness, Chromaticity and Color Difference The lightness index L ^* and the perceived chromaticity indexes a ^* and b ^* are JIS-Z
Color difference meter C manufactured by Minolta according to 8722-1995
The obtained inkjet recording medium was measured using R-200. The color difference (ΔE ^* ) was calculated for the paper to be calibrated.

3) Ink Absorbability The ink absorbability was evaluated by printing a heavy-colored square pattern with cyan ink and magenta ink using BJC-420J manufactured by Canon Inc. which is an ink jet recording apparatus.
The boundary between the printed pattern and the unprinted portion was visually evaluated according to the following criteria. ：: No bleeding was observed at the boundary portion ：: Little bleeding was observed at the boundary portion ：: Bleeding was detected at the boundary portion ×: Remarkable bleeding was observed at the boundary portion Good ink absorption Shown are the evaluations of ◎ to ○.

4) Texture evaluation The touch, texture, etc. of the blank paper of each recording medium were sensuously evaluated. In the evaluation, ◎ indicates that the sensory difference from the target printing paper is extremely small, も の indicates that the sensory sense is acceptable without much discomfort, △ indicates that the difference is slightly felt, and X indicates that the difference is extremely strong. And

5) Evaluation of apparent similarity The outer case of the tissue paper made by Mitsubishi Paper Mills was disassembled, and its design was taken into a personal computer with a scanner to obtain a print proof image. This image was output to an inkjet recording medium using an Epson inkjet printer (PM-770C), cut out into a mold, assembled and functionally evaluated for apparent similarity.も の indicates that the sensory difference is extremely small, ○ indicates that the sensory sense is acceptable without much discomfort, △ indicates that the difference is slightly felt, and X indicates that the difference is extremely strong.

[0153]

[Table 1]

[0154]

[Table 2]

[0155]

[Table 3]

[0156]

[Table 4]

As long as the ink receiving layer is provided on the support laminated from Tables 1 to 4 and the surface thereof is subjected to a casting treatment, a printed matter having a very high similarity as a calibration use of the target paper container printing paper can be obtained. I can do it. In addition, when the ink jet recording medium of the embodiment in which ΔE ^* is 3 or less is used for print proofing, it can realize a feeling very close to that of a printed matter after the actual printing, even though the surface composition is completely different. It can be understood that the ink jet recording medium is suitable for the present invention.

[0158]

As described above, by implementing the present invention, it is possible to provide an ink jet recording medium suitable for ink jet print proofing and suitable for ink jet printing.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C056 EA04 FC06 2H086 BA01 BA12 BA15 BA21 BA24 BA36 BA41 4D075 AC01 AE03 AE18 AE19 BB05Z BB24Z CA35 CB04 DA04 DB18 DC27 EA17 EA35

Claims (8)

[Claims] 1. An ink jet recording medium comprising at least one ink-receiving layer provided on a support having two or more layers laminated thereon, while the ink-receiving layer is in a wet state, pressed against a heated mirror-finished roll and dried. An ink jet recording medium for calibration characterized by having a glossy finish. 2. The ink jet recording medium for calibration according to claim 1, wherein said support is laminated via an adhesive layer. 3. The ink jet recording medium for calibration according to claim 2, wherein said adhesive layer is a layer mainly composed of a solvent-based adhesive. 4. The ink jet recording medium for calibration according to claim 2, wherein said adhesive layer is a layer formed by a melt extrusion method of a thermoplastic resin. 5. The ink jet recording medium for calibration according to claim 1, wherein said support is laminated by laminating. 6. A basis weight (g / g) of the ink jet recording medium.
m ² ) is 200 g / m ² or more and 800 g / m ² or less, the calibration inkjet recording medium according to any one of claims 1 to 5, wherein 7. The JIS-Z872 of the surface layer of the ink receiving layer
According to the measurement method specified in 2, the lightness index (L ^* ) and the perceived chromaticity index (a ^* , b) specified in JIS-Z8729.
^* ) And the difference between the value of the lightness index (L ^* ) and the value of the perceived chromaticity index (a ^* , b ^* ) of the printing paper to be calibrated are JIS-Z87.
The calibration ink jet recording medium according to claim 1, wherein a color difference (ΔE ^* ) ≦ 3 defined by 30 is satisfied. 8. The ink-jet recording medium for calibration according to claim 1, wherein the ink receiving layer is provided not only on the front side but also on the opposite side via the support.