JP2001260524A - Material to be recorded for non-aqueous ink by means of ink jet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material to be recorded for a non-aqueous ink by means of ink jet having excellent fixability by incorporating good ink absorbability of the non-aqueous ink and preventing oozing-out (bleeding properties) of an ink solvent from a periphery of a printed part by aging, in the material to be ink jet recorded for the non-aqueous ink used for a printer or a plotter utilizing an ink jet recording method using the non-aqueous ink. SOLUTION: The material to be ink jet recorded for the non-aqueous ink comprises an ink absorption layer containing at least a pigment on a support, and a polymer dissolved or swelled by a petroleum-based high boiling point solvent and coating or impregnated into the ink absorption layer. In this case, the pigment of 30 wt.% or more is a calcium carbonate.

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 material for a non-aqueous ink used for a printer, a plotter or the like utilizing an ink jet recording system using a non-aqueous ink. In particular, the present invention relates to a non-aqueous ink jet recording material for a non-aqueous ink having excellent fixability and ink absorbability of a non-aqueous ink containing a petroleum-based high boiling point solvent.

[0002]

2. Description of the Related Art Conventionally, in ink jet recording, an aqueous ink, that is, an ink in which a colorant such as a dye or a pigment is dispersed or dissolved in water or a mixed solvent of water and a hydrophilic solvent has been often used.

[0003] However, ink jet recording using an aqueous ink has various problems that occur when a printed portion of a recording material absorbs and expands a solvent in the ink. Such elongation of the recording material occurs when hydrogen bonds between the fibers that maintain the mechanical strength of the support are cut by the solvent of the aqueous ink, particularly water, and the recording material is transported in the printer. Not only adversely affects the print quality, but also degrades the accuracy of the relative positional relationship between the recording material and the print head, causing undesired phenomena such as a decrease in the dimensional accuracy of the resulting drawing and an uneven image. ing.

To solve such a problem, Japanese Patent Laid-Open Publication No.
No. 0660, 57-10661,
JP-A-202324 and JP-A-5-331397 disclose the use of an ink in which a coloring agent is dissolved or dispersed in a non-aqueous solvent such as an isoparaffin hydrocarbon. According to these inventions, it is possible to perform ink jet recording with high dimensional accuracy and no unevenness of the image without any extension of the recording material. In addition, the low viscosity and low surface tension of non-aqueous solvents make it possible to increase the drive frequency of the print head compared to inkjet recording using aqueous inks. It can be carried out.

As a recording material used for ink jet recording using such a non-aqueous ink, Japanese Patent Application Laid-Open No. 64-247 has been disclosed.
No. 85 discloses a recording material comprising an oil-absorbing inorganic pigment, an organic pigment and an aqueous adhesive, and Japanese Patent Application Laid-Open No. 1-255580 discloses a recording material comprising silica and an adhesive. . These recording materials were so-called mat coat type recording materials in which the recording surface had a matte appearance.

On the other hand, with the recent development of ink jet printers, it has become possible to obtain high-definition images comparable to silver halide photographs. Accordingly, an ink jet recording material having a texture similar to that of a silver halide photograph print, that is, a glossy surface has been desired. Naturally, such a recording material has glossiness, high density of a recorded image and high definition of a recorded image, that is, the periphery of each dot is smooth, and the outline is clear. In addition, it is required that the ink does not repel or flow and that the image has excellent storability, especially high fixability of the colorant.

[0007] In response to such a demand, an ink jet recording using an aqueous ink is disclosed in
JP-A-5680 and JP-A-5-59694 disclose an inkjet recording material provided with a coating layer by a cast coating method. Also, Japanese Patent Application Laid-Open No.
No. 5892 discloses a recording material in which a film made of a water-soluble polymer such as polyvinyl alcohol is formed on the same recording material. Further, JP-A-6-1990
No. 35 describes a recording material in which an ink absorbing layer made of pseudo-boehmite is provided on a support. According to these inventions, it is possible to obtain an ink jet recording material having high gloss and high absorptivity for aqueous ink. However, even if recording is performed on these recording materials with a non-aqueous ink, there is no affinity between the material forming the recording material and the solvent or colorant contained in the ink. The distribution of the colorant becomes uneven and only a low image density can be obtained, the ink is repelled on the surface of the recording material to cause unevenness, and the colorant easily falls off with a slight friction. There were drawbacks. Therefore, even when these recording materials are recorded with a non-aqueous ink, it was impossible at all to obtain a recorded image having high density and fineness and excellent storage fixability.

As a recording material used for ink-jet recording using a non-aqueous ink which has solved such a problem, Japanese Patent Application Laid-Open No. Hei 10-250218 includes a polymer which is soluble in an isoparaffinic hydrocarbon on a coating layer. A recording material having both high definition of a recorded image and high fixability of a coloring agent is disclosed. The polymer soluble in the isoparaffinic hydrocarbon contained in the coating layer is once dissolved by the solvent in the ink after printing, and captures the colorant therein. Then, the solvent is dried and loses fluidity, and the colorant is fixed inside the colorant, whereby the colorant distribution inside the recording material can be made uniform, and the density and definition can be improved. Has the effect of improving the fixability to the recording material. However, when low-concentration inks such as light cyan and light magenta are used for printing, for example, the ink solvent absorbs poorly or the ink solvent retains poorly. Solvent may ooze out of the ink.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to provide an ink jet recording material for a non-aqueous ink used in a printer or a plotter utilizing an ink-jet recording method using a non-aqueous ink. An object of the present invention is to provide an ink jet recording material for a non-aqueous ink, which has excellent absorbability and fixability, and prevents bleeding (bleeding) of an ink solvent from around a printed portion due to strikethrough or aging of ink.

[0010]

The object of the present invention is solved by the following means.

That is, an ink-jet ink for a non-aqueous ink comprising an ink-absorbing layer containing at least a pigment provided on a support, and a polymer that dissolves or swells with a petroleum-based high boiling point solvent is coated or impregnated on the ink-absorbing layer. In the recording material, when 30% by weight or more of the pigment is calcium carbonate, it is possible to provide an ink jet recording material for a non-aqueous ink which is excellent in absorptivity and fixability of an ink solvent of the non-aqueous ink.

Further, since the surface of the ink absorbing layer is subjected to a surface smoothing treatment by a calendering method, it is possible to provide a non-aqueous ink-jet recording material having a glossiness.

Further, since the surface of the ink absorbing layer is subjected to a surface smoothing treatment by a casting treatment method, an ink jet recording material for a non-aqueous ink having a higher glossiness can be provided.

Further, when the ink absorbing layer is subjected to a surface smoothing treatment by a casting treatment method, a high glossiness can be obtained by using an air-permeable support such as a general paper, a coated paper, a nonwoven fabric, and a cloth. An inkjet recording material for a non-aqueous ink can be provided.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail with reference to preferred embodiments.

The ink-jet recording material for a non-aqueous ink of the present invention is provided with an ink-absorbing layer containing at least a pigment on a support, and a polymer which dissolves or swells with a petroleum-based high-boiling solvent on the ink-absorbing layer. , A solvent-soluble polymer) is coated or impregnated with a non-aqueous ink-jet recording material.
% Or more is calcium carbonate.

By using calcium carbonate as a pigment in an amount of 30% by weight or more, the ink absorbability is excellent, and it is possible to prevent the ink solvent from oozing out from around the printed portion with the passage of time.

It is not clear why calcium carbonate prevents bleeding of the ink solvent of the non-aqueous ink, but calcium carbonate has an extremely strong affinity for the solvent of the non-aqueous ink, It is considered that the ability of adsorbing and holding the pigment on the surface of the pigment is superior to silica or the like which is a pigment used in a general aqueous ink jet recording material.

Such calcium carbonate is roughly classified into two types. One is a natural product (heavy calcium carbonate) produced by physically pulverizing limestone as it is, and the other is sedimentation produced by chemically reacting various raw materials. Although there are products (light calcium carbonate, ultrafine calcium carbonate) and the like, any calcium carbonate may be used in the present invention.

The average particle size of calcium carbonate is 0.1.
In the range of 04 to 8 μm, more preferably 0.4 to 1.5 μm
A range of m is preferred. By using calcium carbonate having a particle size in such a range, the ink solvent absorbability can be satisfied. Average particle size is 0.04μ
If it is smaller than m, the viscosity of the coating solution increases and the adhesion to the substrate deteriorates, which is not preferable. On the other hand, if the average particle size is larger than 8 μm, the surface is not smooth enough, and the ink absorbability becomes uneven, and the gloss is undesirably reduced.

As the pigment used in the ink absorbing layer, one or more other known pigments can be used in combination as long as the pigment contains 30% by weight or more of calcium carbonate. For example, kaolin, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc carbonate, satin white, aluminum silicate, diatomaceous earth, calcium silicate, magnesium silicate, synthetic amorphous silica, colloidal silica, colloidal alumina, pseudo Inorganic pigments such as boehmite, aluminum hydroxide, alumina, zeolite, magnesium carbonate, magnesium hydroxide, etc .; organic pigments such as styrene plastic pigment, acrylic plastic pigment, polystyrene, microcapsules, urea resin, melamine resin, etc. However, the present invention is not limited to these. When calcium carbonate is not contained in an amount of 30% by weight or more as a pigment of the ink absorbing layer, the ink absorbency is poor, and the ink solvent oozes out from the periphery of the printed portion over time, which is not preferable.

Examples of the binder for binding the pigment in the ink absorbing layer include starch and denatured substances thereof, gelatin and denatured substances thereof, casein, pullulan, gum arabic, karaya gum, natural polymer resins such as albumin and the like. Derivatives, polyvinyl alcohol or its cation-modified or silanol-modified, SBR latex, NBR latex, latexes such as methyl methacrylate-butadiene copolymer and ethylene-vinyl acetate copolymer, polyacrylamide, vinyl polymers such as polyvinylpyrrolidone, Examples thereof include polymers of polyethyleneimine, polypropylene glycol, polyethylene glycol, and maleic anhydride or copolymers thereof, and these may be used alone or in combination of two or more.

In the coating liquid for forming the ink absorbing layer, in addition to a pigment and a binder, if necessary, a surfactant, a coloring dye, a coloring pigment, a cationic ink dye fixing agent, an ultraviolet absorber, Known various additives such as an antioxidant, a pigment dispersant, an antifoaming agent, a leveling agent, a preservative, an optical brightener, a viscosity stabilizer, and a pH adjuster can also be added.

The coating amount of the ink absorbing layer on the support is preferably 5 to 50 g / m ² , more preferably 10 to 30 g, in order to impart the solvent absorbency and the smoothness of the surface of the ink.
/ M ² is preferred.

The ink absorbing layer is formed by applying and drying using a coating apparatus. As a method for applying the coating liquid, for example, a commonly used coating method such as a slide hopper method, a curtain method, an extrusion method, an air knife method, a roll coating method, and a rod bar coating method is used.

The ink absorbing layer in the present invention can be subjected to a surface smoothing treatment by passing between ink rolls using a processing device such as a super calender. It is particularly preferable to set the 75-degree specular glossiness to 20% or more because the glossiness becomes like a photographic or art paper or a coated paper.

The ink-absorbing layer in the present invention is pressed against a mirror-finished heating roll surface while the coating layer is in a wet state, or after being dried and rewet once, and then dried and dried.
It is also preferable to carry out a surface smoothing treatment by a so-called cast treatment method, which is obtained by copying the mirror surface by releasing the mold.

The solvent-soluble polymer in the present invention is once dissolved by the solvent in the ink after printing to capture the colorant therein, and then the solvent disappears and loses fluidity to fix the colorant therein. This has the effect of improving the fixability of the colorant to the recording medium.

Such a solvent-soluble polymer is one that dissolves or swells at an arbitrary ratio with a petroleum-based high-boiling solvent at room temperature, and various polymers satisfying this condition can be used. For example, poly (1,3-diene) such as polybutadiene / polyisoprene,
Polyalkyl (C4 or more) vinyl ether, polyalkyl
(C4 or more) vinyl carboxylate, polyalkyl (C4 or more)
(Meth) acrylate, polyalkyl (C6 or more) (meth) acrylamide, polyoxyalkylene (C4 or more), polydimethylsiloxane, petroleum resin (C5 type, C9 type), novolak resin, polymer such as gutta percha, and polymers thereof Can be used as the solvent-soluble polymer in the present invention.

These solvent-soluble polymers may be subjected to various modifications within a range that does not lose the solubility in petroleum-based high-boiling solvents. For example, lower alkyl vinyl ether, lower alkyl vinyl carboxylate, lower alkyl (meth) acrylate, (meth) acrylic acid, tetrahydrofurfuryl (meth) acrylate, alkyloxyethyl (meth) acrylate, dialkylaminoethyl (meth) Acrylate, lower alkyl (meth) acrylamide, (meth) acrylamide, lower (di) alkyl (meth) acrylamide, diacetone (meth) acrylamide, 2-
(Meth) acrylamide-2-methylpropanesulfonic acid, dialkylaminopropyl (meth) acrylamide,
By copolymerizing a monomer such as styrene with the monomer constituting the polymer, the polymer soluble in the petroleum-based high boiling point solvent of the present invention can be modified.

As a method for incorporating the solvent-soluble polymer into the ink absorbing layer, it is preferable to dissolve the polymer in an appropriate organic solvent and apply it. this is,
This is because the solvent-soluble polymer can be concentrated on the surface portion of the recording material to more preferably exert the effect of including the solvent-soluble polymer.

The coating amount of the solvent-soluble polymer allowed to contain on the ink absorbing layer is preferably in a 0.3~15g / m ^2, and particularly preferably to 3 to 10 g / m ^2. If the coating amount is less than this range, the colorant cannot be firmly fixed, and the fixability of the colorant will be poor.If the coating amount is larger than this range, the ink absorption speed will decrease. Insufficiently, unevenness occurs in the image, which is not preferable.

Examples of the method of applying the solvent-soluble polymer include commonly used coating methods such as a roll coater, an air knife coater, a blade coater, a rod coater, a bar coater, a gravure coater, and a curtain coater. The invention is not limited to these.

As the support used in the present invention, any of transparent and opaque substrates can be used. For example, polyester, polysulfone, polyvinyl chloride, polycarbonate, polystyrene, polymethyl methacrylate, cellulose acetate, polyethylene, transparent films such as polypropylene, or filled with a white pigment, or a film whitened by fine foaming or Synthetic paper, general paper, coated paper, baryta paper, resin-coated paper and the like are mainly used. Further, the support is not particularly limited as long as it can be provided with an ink-absorbing layer such as glass, aluminum foil, vapor-deposited paper, vapor-deposited film, and cloth, but is generally air-permeable such as general paper, coated paper, and cloth. Is preferred.

In particular, when the surface is smoothed by a casting method, it is necessary to evaporate the water from the back surface of the support in order to dry the coated surface in a wet state by closely contacting it with a cast drum. If a non-permeable support is used, water cannot evaporate to the back surface and air bubbles are generated between the coating surface and the cast drum surface, and that portion becomes spots without a mirror surface formed The support is preferably air-permeable.

The index used as a measure of the air permeability of the support is air permeability. When the surface is smoothed by the casting method, the air permeability value according to "JIS P 8117" is 1000 seconds or less. It is preferred that It is more preferably 500 seconds or less. If the air permeability is more than 1000 seconds, air bubbles are easily generated between the coating surface and the cast drum surface, which is not preferable.

The support in the present invention may be provided with an anchor layer for the purpose of improving adhesiveness and the like. The anchor layer is a hydrophilic binder such as gelatin, a solvent-soluble binder such as polyvinyl butyral, a latex, a curing agent, a pigment,
Surfactants and the like can be appropriately combined and contained.

The support in the present invention has an antistatic property,
For transportability, curl prevention, writing, gluing, etc.
Various back coat layers can be applied. In the back coat layer, an inorganic antistatic agent, an organic antistatic agent, a hydrophilic binder, a latex, a curing agent, a pigment, a lubricant, a surfactant and the like can be appropriately combined and contained.

As the non-aqueous ink in the present invention, an ink in which a coloring agent is dissolved or dispersed in a non-aqueous solvent is used.

The non-aqueous solvent is selected from the group consisting of:
Alternatively, various solvents are selected from the viewpoint of safety, and in some cases, a mixture of plural kinds of solvents may be used.

Representative examples of such solvents include the following: petroleum naphtha-based solvents such as pegazol (manufactured by Mobil Petroleum Co., Ltd.), Shell SBR, and Shell Sole (manufactured by Shell Petrochemical Co., Ltd.); Aromatic petroleum solvents such as Hizosol (Nippon Oil Co., Ltd.), aliphatics such as Solutol (Philips Oil Co., Ltd.), Exoxol, Isopar (Exxon Chemical Co., Ltd.), IP Solvent (Idemitsu Petrochemical Co., Ltd.) And a naphthenic petroleum solvent such as an ink solvent (manufactured by Mitsubishi Petroleum Corporation).

As a coloring agent used in the non-aqueous ink,
For example, naphthol dye, azo dye, metal complex dye, anthraquinone dye, quinoimine dye, indigo dye, cyanine dye, quinoline dye, nitro dye, nitroso dye, benzoquinone dye, carbonium dye, naphthoquinone dye, naphthalimide dye, phthalocyanine dye, perinine Dissolving or dispersing oil-soluble dyes such as dyes, carbon blacks such as furnace black, lamp black, acetylene black, channel black, or organic pigments such as ortho nitroaniline black, toluidine red, permanent carmine FB, first Yellow AAA, Disazo Orange PMP, Lake Red C, Brilliant Carmine 6B, Phthalocyanine Blue, Quinacridone Red, Dioxane Violet, Pictoria Pure Lou, alkali blue toner,
Fast Yellow 10G, orthonitroaniline orange, toluidine red, barium red 2B, calcium red 2B, pigment scar red 3B lake,
Ansosine 3B Lake, Rhodamine 6G Lake, Methyl Bio Red Lake, Basic Blue 5B Lake, Fast Sky Blue, Alkaline Blue R Toner, Navy Blue, Ultramarine, Reflex Blue 2G, Brilliant Green Lake, Phthalocyanine Green G, Iron Oxide Powder, Zinc Flower , Calcium carbonate, clay, barium sulfate, alumina white, aluminum powder, daylight fluorescent pigments, pearl pigments and the like, and other processed pigments which have been surface-treated can be used, but are not limited thereto. .

For the purpose of improving the storage stability and scratch resistance after printing, non-aqueous inks include, for example,
Add polar resins such as polyacrylic acid ester, linseed oil-modified alkyd resin, polystyrene, rosin-based resin, terpene phenol-based resin, alkylphenol-modified xylene resin, sequestering agent, surface tension regulator, surfactant, and viscosity control Agents, defoamers, defoamers, mold release agents, foaming agents, penetrants, optical brighteners, ultraviolet absorbers, preservatives, water-resistant agents, rheology modifiers and antioxidants It can also be contained.

[0044]

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 the examples.
In the examples, "parts" and "%" indicate parts by weight and% by weight, unless otherwise specified.

(Preparation of support) Freeness 450 ml CSF
Wood pulp consisting of 100 parts of LBKP, the ratio of light calcium carbonate / heavy calcium carbonate / talc is 30 /
5 parts of 35/35 pigment, 0.1 part of commercially available alkyl ketene dimer, 0.03 of commercially available cationic polyacrylamide
And 1.0 part of a commercially available cationized starch and 0.5 part of a sulfuric acid band, were prepared, and then formed into a paper having a basis weight of 110 g / m ² using a fourdrinier paper machine to obtain a support. The resulting support has an air permeability of 25.
Seconds.

Example 1 (Preparation of ink absorbing layer A) 100 parts by weight of light calcium carbonate (Albagross: particle size: 0.6 to 0.8 μm, manufactured by Mintec Japan), polyvinyl alcohol (PVA11)
8: 8 parts by weight of Kuraray Co., Ltd.) and 0.24 part of glyoxal (Glyoxal GX: 40% aqueous solution, manufactured by Nippon Synthetic Chemical Co., Ltd.) were sequentially mixed to prepare a coating liquid. This coating liquid was applied onto the support prepared above with an air knife coater at a rate of 20 g / m ² to prepare “ink absorbing layer A”.

(Preparation and Coating of Solvent-Soluble Polymer Coating Liquid) In a four-necked flask equipped with a stirrer, 100 parts of xylene was charged as a solvent, and the mixture was placed in a water bath while passing nitrogen.
Heated to 0 ° C. Here, 2,2 'is used as a polymerization initiator.
5 parts of -azobis (2-methylbutyronitrile) was added, and a mixture of 50 parts of lauryl methacrylate + 50 parts of isobornyl methacrylate was added dropwise over 4 hours. After the completion of the addition, the mixture was maintained at 70 ° C for 4 hours. Thereafter, the mixture was heated to 90 ° C. and maintained at this temperature for 2 hours to obtain a polymer solution.
The polymer solution was spread thinly on a glass plate and dried at 80 ° C., and then the dried film was peeled off and stirred and dissolved in 4-fold weight Isopar G. Further, the polymer solution was evaporated to dryness using a rotary evaporator, and then dissolved in Isopar G to adjust the concentration to 20% to prepare a “solvent-soluble polymer coating solution”.

This coating liquid was applied onto the “ink-absorbing layer A” using a wire bar so that the dry coating amount was 5 g / m ^2, and the ink jet recording for the non-aqueous ink of Example 1 was performed. The material was obtained.

Example 2 (Preparation of Ink Absorbing Layer B) The above-prepared “Ink Absorbing Layer A” was subjected to a super calender treatment at a linear pressure of 1,862 N / cm to prepare “Ink Absorbing Layer B”. Example 2 A solvent-soluble polymer coating solution was applied in the same manner as in Example 1, and
Ink-jet recording material for non-aqueous ink was obtained.

Example 3 (Preparation of ink absorption layer C) 100 parts by weight of light calcium carbonate (Albagross: particle size: 0.6 to 0.8 μm, manufactured by Mintec Japan), polyvinyl alcohol (PVA11)
8: 8 parts by weight of Kuraray Co., Ltd.) and 0.24 part of glyoxal (Glyoxal GX: 40% aqueous solution, manufactured by Nippon Synthetic Chemical Co., Ltd.) were sequentially mixed to prepare a coating liquid. This coating liquid was applied on the support prepared above with an air knife coater at 20 g / m ² , pressed against a mirror roll having a surface temperature of 90 ° C. and dried to prepare an “ink absorbing layer C”. In the same manner as in Example 1, a solvent-soluble polymer coating liquid was applied to obtain a non-aqueous ink jet recording material of Example 3.

Example 4 (Preparation of Ink Absorbing Layer D) Instead of 100 parts by weight of the light calcium carbonate of Example 1, light calcium carbonate (Albagross: particle size: 0.6 to 0.8 μm, manufactured by Mintec Japan) 50 parts by weight of synthetic amorphous silica (Miscasil P7
8A: An “ink-absorbing layer D” was prepared in the same manner as in Example 1 except that 50 parts by weight of an average particle diameter of 3.3 μm, manufactured by Mizusawa Chemical Industry was used. The working liquid was applied to obtain an ink jet recording material for a non-aqueous ink of Example 4.

Example 5 (Preparation of Ink Absorbing Layer H) The above-prepared “Ink Absorbing Layer D” was subjected to a super calendering treatment at a linear pressure of 1862 N / cm to prepare an “Ink Absorbing Layer E”. Example 5 A solvent-soluble polymer coating solution was applied in the same manner as in Example 1, and
Ink-jet recording material for non-aqueous ink was obtained.

Example 6 (Preparation of Ink Absorbing Layer I) 50 parts by weight of light calcium carbonate (Albagross: particle size: 0.6 to 0.8 μm, manufactured by Mintec Japan), synthetic amorphous silica (Miskasil P78)
A: 50 parts by weight of average particle size 3.3 μm, manufactured by Mizusawa Chemical Industries, 8 parts by weight of polyvinyl alcohol (PVA117: manufactured by Kuraray Co., Ltd.), glyoxal (Glyoxal G)
X: 40% aqueous solution, manufactured by Nippon Synthetic Chemical Co., Ltd.) 0.24
Parts were sequentially blended to prepare a coating solution. The coating solution was applied onto the support prepared above with an air knife coater at 20 g / m ^2.
The composition was applied, pressed against a mirror roll having a surface temperature of 90 ° C. and dried to prepare an “ink-absorbing layer F”. A solvent-soluble polymer coating liquid was applied in the same manner as in Example 1. An inkjet recording material for a non-aqueous ink was obtained.

Example 7 (Preparation of Ink Absorbing Layer G) Instead of 100 parts by weight of light calcium carbonate in Example 1, light calcium carbonate (Albagross: particle size: 0.6 to 0.8 μm, manufactured by Mintec Japan) 35 parts by weight of synthetic amorphous silica (Miscasil P7
8A: An “ink-absorbing layer G” was prepared in the same manner as in Example 1 except that 65 parts by weight of an average particle size of 3.3 μm, manufactured by Mizusawa Chemical Industry Co., Ltd. were used. The working liquid was applied to obtain an ink jet recording material for a non-aqueous ink of Example 7.

Example 8 (Preparation of Ink Absorbing Layer H) The above-prepared “Ink Absorbing Layer G” was subjected to a super calender treatment at a linear pressure of 1,862 N / cm to prepare “Ink Absorbing Layer H”. Example 8 A solvent-soluble polymer coating liquid was applied in the same manner as in Example 1, and
Ink-jet recording material for non-aqueous ink was obtained.

Example 9 (Preparation of Ink Absorbing Layer I) 35 parts by weight of light calcium carbonate (Albagross: particle size: 0.6 to 0.8 μm, manufactured by Mintec Japan), synthetic amorphous silica (Miskasil P78)
A: 65 parts by weight of average particle diameter 3.3 μm, manufactured by Mizusawa Chemical Industries, 8 parts by weight of polyvinyl alcohol (PVA117: manufactured by Kuraray Co., Ltd.), glyoxal (Glyoxal G)
X: 40% aqueous solution, manufactured by Nippon Synthetic Chemical Co., Ltd.) 0.24
Parts were sequentially blended to prepare a coating solution. The coating solution was applied onto the support prepared above with an air knife coater at 20 g / m ^2.
The ink was applied and dried by pressing against a mirror surface roll having a surface temperature of 90 ° C. to prepare an “ink absorbing layer I”, and a solvent-soluble polymer coating liquid was applied in the same manner as in Example 1. An inkjet recording material for a non-aqueous ink was obtained.

Comparative Example 1 (Preparation of Ink Absorbing Layer J) Instead of 100 parts by weight of light calcium carbonate in Example 1, synthetic amorphous silica (Miskasil P78A: average particle size 3.3 μm, manufactured by Mizusawa Chemical Industry)
Except for using 100 parts by weight, in the same manner as in Example 1,
“Ink absorbing layer J” was prepared, and a solvent-soluble polymer coating liquid was applied in the same manner as in Example 1 to obtain an inkjet recording material for a non-aqueous ink of Comparative Example 1.

Comparative Example 2 (Preparation of Ink Absorbing Layer K) Instead of 100 parts by weight of light calcium carbonate of Example 1, light calcium carbonate (Albagross: particle size: 0.6 to 0.8 μm, manufactured by Mintec Japan) 20 parts by weight of synthetic amorphous silica (Miscasil P7
8A: An ink-absorbing layer K was prepared in the same manner as in Example 1 except that 80 parts by weight of an average particle size of 3.3 μm, manufactured by Mizusawa Chemical Industries was used. The working liquid was applied to obtain an inkjet recording material for a non-aqueous ink of Comparative Example 2.

Comparative Example 3 (Preparation of Ink Absorbing Layer L) The “ink absorbing layer L” prepared above was subjected to a super calender treatment at a linear pressure of 1,862 N / cm to prepare “ink absorbing layer L”. In the same manner as in Example 1, a solvent-soluble polymer coating liquid was applied to obtain an inkjet recording material for a non-aqueous ink of Comparative Example 3.

Comparative Example 4 (Preparation of Ink Absorbing Layer M) 20 parts by weight of light calcium carbonate (Albagross: particle size: 0.6 to 0.8 μm, manufactured by Mintec Japan), synthetic amorphous silica (Miskasil P78)
A: average particle size of 3.3 μm, 80 parts by weight of Mizusawa Chemical Industry, 8 parts by weight of polyvinyl alcohol (PVA117: manufactured by Kuraray Co., Ltd.), glyoxal (Glyoxal G)
X: 40% aqueous solution, manufactured by Nippon Synthetic Chemical Co., Ltd.) 0.24
Parts were sequentially blended to prepare a coating solution. The coating solution was applied onto the support prepared above with an air knife coater at 20 g / m ^2.
It was applied and pressed against a mirror-surface roll having a surface temperature of 90 ° C. and dried to prepare an “ink absorbing layer M”. A solvent-soluble polymer coating liquid was applied in the same manner as in Example 1, An inkjet recording material for a non-aqueous ink was obtained.

Comparative Example 5 An ink jet recording material for a non-aqueous ink of Comparative Example 5 was obtained in the same manner as in Example 1 except that the solvent-soluble polymer coating liquid was not applied.

Comparative Example 6 An ink jet recording material for a non-aqueous ink of Comparative Example 6 was obtained in the same manner as in Example 2, except that the solvent-soluble polymer coating liquid was not applied.

Comparative Example 7 An ink jet recording material for a non-aqueous ink of Comparative Example 7 was obtained in the same manner as in Example 3 except that the solvent-soluble polymer coating liquid was not applied.

Comparative Example 8 An ink jet recording material for a non-aqueous ink of Comparative Example 8 was obtained in the same manner as in Example 4 except that the solvent-soluble polymer coating liquid was not applied.

Comparative Example 9 An ink jet recording material for a non-aqueous ink of Comparative Example 9 was obtained in the same manner as in Example 5, except that the solvent-soluble polymer coating liquid was not applied.

Comparative Example 10 An ink jet recording material for a non-aqueous ink of Comparative Example 10 was obtained in the same manner as in Example 6, except that the solvent-soluble polymer coating liquid was not applied.

Comparative Example 11 An ink jet recording material for a non-aqueous ink of Comparative Example 11 was obtained in the same manner as in Example 7, except that the solvent-soluble polymer coating liquid was not applied.

Comparative Example 12 An ink jet recording material for a non-aqueous ink of Comparative Example 12 was obtained in the same manner as in Example 8, except that the solvent-soluble polymer coating liquid was not applied.

Comparative Example 13 An ink jet recording material for a non-aqueous ink of Comparative Example 13 was obtained in the same manner as in Example 9 except that the solvent-soluble polymer coating liquid was not applied.

Examples 1 to 9 produced as described above,
Regarding the inkjet recording materials for non-aqueous inks of Comparative Examples 1 to 13, an inkjet printer (PJ360) was used.
0: manufactured by Olympus Optical Industrial Company), monochromatic (cyan, magenta, yellow, black), bicolor (cyan + magenta, magenta + yellow, cyan + yellow), tricolor (cyan + magenta) (+ Yellow) square solid printing pattern was printed and evaluated by the following method. The results are shown in Table 1.

(Evaluation Method) (Glossiness) The glossiness was evaluated using a glossmeter (GM-26).
D type, manufactured by Murakami Color Research Laboratory Co., Ltd.), and the 75-degree specular gloss (Gs) of the unprinted portion is JIS-Z-8741.
Represents the glossiness measured by the method described above.

(Fixing property) The evaluation of "fixing property" was made by rubbing the surface of the solid printed portion of the black ink once in one direction with an index finger, and the colorant did not spread to the surrounding white paper (unprinted) portion. (Good fixability) was evaluated as “○”, practically no problem but slightly spread of the colorant was evaluated as “Δ”, and colorant dropped off from the surface (defective fixability) was evaluated as “x”.

(Ink Absorption) The ink absorption was evaluated by visually observing and evaluating the ink drying state immediately after printing of the solid printing portions of single color, two-color and three-color, and printing.
A sample that could be printed without any overflow of the ink was marked with “○”, a sample that caused some ink overflow but caused print unevenness was rated as “Δ”, and a sample that did overflow did not have a problem with “x”.

(Ink strikethrough) Evaluation of the “ink strikethrough” was made by observing the three-color superimposed solid printing portion from the back side of the printing surface, and visually observing the degree of strikethrough of the ink to the base paper side. When no ink strikethrough was observed at all, “○” was assigned to the ink, strikethrough was slightly observed for the ink, and “x” was assigned for severe strikethrough. "O" or more is good.

(Bleedability) The evaluation of “bleedability” is as follows.
The bleeding of the ink solvent from around the printing part 24 hours after the three-color superimposed solid printing part was visually observed and evaluated. If there was no bleeding, "O" indicates that no bleeding was observed. Was evaluated as "△" when the bleeding occurred, and "x" when the bleeding was clearly observed.

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[Table 1]

Ink jet recording for non-aqueous inks, comprising providing an ink absorbing layer containing at least a pigment on a support, and coating or impregnating a polymer which dissolves or swells with a petroleum-based high boiling point solvent on the ink absorbing layer. In Examples 1 to 9, in which 30% or more of the pigment is calcium carbonate in the material, the ink solvent absorbs well, and the ink solvent oozes out of the periphery of the printed portion with time (bleeding property).
This was an ink jet recording material for a non-aqueous ink which was excellent in fixability and was excellent in fixing property. Comparative Example 1 in which the ink absorption layer was made of silica instead of calcium carbonate, and Comparative Examples 2 to 4 in which the content of calcium carbonate used in the ink absorption layer was less than 30% were poor in ink strike-through. Met. In Comparative Examples 5 to 13, ink fixability was poor because there was no solvent-soluble polymer layer.

[0078]

According to the present invention, it is possible to provide an ink jet recording material for a non-aqueous ink which is excellent in bleeding property with a non-aqueous ink, and excellent in fixability, ink absorption and ink strike-through.

Claims (4)

[Claims] 1. An ink jet for non-aqueous ink, comprising: providing an ink absorbing layer containing at least a pigment on a support; and coating or impregnating a polymer that dissolves or swells with a petroleum-based high boiling point solvent on the ink absorbing layer. An ink jet recording material for a non-aqueous ink, wherein 30% by weight or more of the pigment is calcium carbonate. 2. The ink-jet recording material for non-aqueous ink according to claim 1, wherein said ink absorbing layer has been subjected to a surface smoothing treatment by a calendering method. 3. The ink absorbing layer according to claim 1, wherein the surface is smoothed by a casting method.
The inkjet recording material for a non-aqueous ink according to the above. 4. The ink-jet recording material for a non-aqueous ink according to claim 3, wherein the support is a permeable support.