JP2001246834A - Ink jet recording material for non-aqueous ink - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink jet recording material for non-aqueous ink used in a printer or a plotter utilizing an ink jet recording system using non-aqueous ink, good in the absorbency of non-aqueous ink, prevented from the strike- through of ink to raw-paper and excellent in fixing properties. SOLUTION: In the ink jet recording material for non-aqueous ink constituted by providing at least one ink absorbing layer on a support and coating or impregnating the ink absorbing layer with a polymer dissolved or swollen by a petroleum type high boiling point solvent, an undercoating layer containing at least one kind of pigment selected from the group consisting of barium sulfate, calcium carbonate, titanium oxide and kaolin is provided between the support and the ink absorbing layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-aqueous ink-jet recording material for a non-aqueous ink used in a printer or a plotter 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 storage stability, that is, the colorant has a high fixing property.

[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 discloses 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 stability.

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 the type of ink used for printing, for example, low-concentration ink such as light cyan or light magenta, is used, a large amount of ink is ejected. The ink overflows on the surface, causing unevenness,
Printing defects such as strike-through of the ink on the base paper side may occur.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention 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 is excellent in the properties and fixability, and prevents the bleeding (bleeding property) of the ink solvent from around the printed portion due to strikethrough or aging of the ink.

[0010]

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

That is, at least one ink-absorbing layer is provided on a support, and the ink-absorbing layer is coated with or impregnated with a polymer that dissolves or swells with a petroleum-based high-boiling solvent. In the recording material, by providing an undercoat layer containing at least one pigment selected from the group consisting of barium sulfate, calcium carbonate, titanium oxide, and kaolin between the support and the ink absorbing layer, the ink solvent of the non-aqueous ink is provided. Thus, an ink-jet recording material for a non-aqueous ink having excellent ink absorbability, penetration of ink, prevention of bleeding of the ink solvent from around the printed portion due to aging (bleeding property), and excellent fixability could be provided.

Further, the present invention provides an ink jet recording material for a non-aqueous ink which is excellent in fixing and ink absorptivity of the non-aqueous ink and excellent in gloss because the outermost layer of the ink absorbing layer is a gloss expressing layer. Was completed.

[0013] Further, by applying a so-called casting method, in which the glossy layer is pressed against a heated specular roll while the glossy layer is wet and dried to impart gloss, the ink jet coating for non-aqueous inks having higher gloss is provided. The recording material could be provided.

[0014]

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 according to the present invention is provided with at least one ink absorbing layer on a support, and a polymer which dissolves or swells with a petroleum-based high boiling point solvent in the ink absorbing layer (hereinafter referred to as solvent). (Abbreviated as soluble polymer) for an ink jet recording material for a non-aqueous ink containing at least one pigment selected from the group consisting of barium sulfate, calcium carbonate, titanium oxide and kaolin between a support and an ink absorbing layer. It is characterized by providing an undercoat layer containing the undercoat layer.

The undercoat layer in the present invention absorbs and retains the ink solvent of the non-aqueous ink with the pigments shown below. It has the role of preventing it from being issued.

The pigment used in the undercoat layer is an inorganic pigment such as barium sulfate, calcium carbonate, titanium oxide and kaolin.

It is not clear why these pigments prevent the penetration of the ink solvent of the non-aqueous ink into the base paper, but these pigments have a very strong affinity for the solvent of the non-aqueous ink, It is thought that the ability to adsorb and retain the solvent on the surface of the pigment is better than others.

Among these pigments, barium sulfate can be obtained by various production methods. For example, one solution is prepared by using a 5 to 20% aqueous solution of neutral crystalline sodium sulfate and a 5 to 20% aqueous solution of neutral crystalline barium chloride. There is a method in which the other liquid is added with stirring and reacted to generate barium sulfate. The sulfide content of barium sulfate obtained by this method is 0.01 ppm or less. This barium sulfate is a barium sulfate which has less discoloration and less discoloration and has excellent weather resistance.

The average particle size of the pigment used in the undercoat layer is in the range of 0.02 to 3 μm, more preferably 0.1 to 3 μm.
Those having a range of 2.0 μm are preferred. By using a pigment having a particle diameter in such a range, ink solvent absorbency can be satisfied. Average particle size is 0.02μm
If it is smaller, the viscosity of the coating liquid increases and the adhesiveness to the substrate deteriorates, which is not preferable. On the other hand, if the average particle diameter is larger than 3 μm, the smoothness of the surface is inferior and the ink absorbability becomes uneven, which is not preferable.

Examples of the binder for binding the pigment of the undercoat layer include starch and its modified products, gelatin and its modified products, natural polymer resins such as casein, pullulan, gum arabic, gum karaya, albumin, and the like. Derivative, polyvinyl alcohol or its cation modified or silanol modified, SBR latex, N
Latexes such as BR latex, methyl methacrylate-butadiene copolymer and ethylene-vinyl acetate copolymer, polyacrylamide, vinyl polymers such as polyvinylpyrrolidone, polyethyleneimine, polypropylene glycol, polyethylene glycol, and maleic anhydride polymer or the like. Copolymers and the like can be mentioned,
These may be used alone or in combination of two or more.

The amount of the undercoat layer applied to the support is preferably 1 to provide the solvent absorbency and the surface smoothness of the ink.
To 40 g / m ^2, more preferably in the range of 5 to 20 g / m ^2.

The undercoat 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 refers to a porous layer mainly composed of a pigment and having an ink-absorbing property. By providing the ink-absorbing porous layer, the ink solvent absorption rate of the recording medium is improved, and it is possible to prevent print dots from moving on the recording medium surface and causing unevenness in the recorded image.

As the pigment used in the ink absorbing layer, one or more known pigments can be used. For example, light calcium carbonate, heavy calcium carbonate, 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-boehmite, aluminum hydroxide, alumina, zeolite, magnesium carbonate, magnesium hydroxide, and other inorganic pigments, styrene plastic pigment, acrylic plastic pigment, polystyrene, microcapsules, urea resin, melamine resin And organic pigments. Among the above, as the pigment contained as a main component of the porous layer, a porous inorganic pigment is preferable, and examples thereof include porous synthetic amorphous silica, porous magnesium carbonate, and porous alumina. Synthetic amorphous silica is preferred.

Examples of the pigment binder used in the ink absorbing layer include starch and modified products thereof, gelatin and modified products thereof, natural polymer resins such as casein, pullulan, gum arabic, gum karaya, albumin, and derivatives thereof. , Polyvinyl alcohol or its cation modified products or silanol modified products, SBR latex, NBR latex, latexes such as methyl methacrylate-butadiene copolymer and ethylene-vinyl acetate copolymer, vinyl polymers such as polyacrylamide and polyvinyl pyrrolidone, polyethylene Examples thereof include polymers of imine, 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, a surfactant, a coloring dye, a coloring pigment, a cationic ink dye fixing agent, an ultraviolet absorbing agent, if necessary, in addition to a pigment and a binder. 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 coating liquid for forming the ink absorbing layer and
3 to 30 g / m in terms of solid content ^Two, More preferably
10 to 20 g / m^TwoIt is. When the coating amount exceeds that
It is not preferable because the drying property of the ink absorbing layer deteriorates.

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 glossiness of the ink absorbing layer can be increased by providing a gloss developing layer formed of colloid particles on the outermost layer of the ink absorbing layer in the present invention. In the gloss developing layer, solvent absorbency is expressed by voids existing between the colloid particles.

Various colloidal particles can be used as the colloid particles forming the glossy layer. As an example, inorganic colloid particles composed of alumina (hydrate) such as pseudo-boehmite and boehmite, silica, titania and the like can be given. Among these, colloidal particles composed of alumina and silica are particularly preferably used because a bonding force between the colloidal particles is strong and a glossy layer having high mechanical strength can be obtained.

Various methods can be used to form a glossy layer from such colloidal particles. For example, there is a method in which a coating liquid in which a colloidal particle dispersion such as alumina sol or silica sol is used alone or mixed with an appropriate binder is coated on a support, and then simply dried. In addition to this method, after applying the coating liquid for the gloss-generating layer, while the gloss-generating layer is in a wet state, or once dried and then re-wetted, it is pressed into contact with a mirror-finished roll, It can also be formed by a so-called casting method in which the surface shape is transferred to a gloss-developing layer, which is preferable because a higher gloss can be obtained than a simple coating / drying method.

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 is dried to lose fluidity and 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 that meet 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 as long as the solubility in petroleum-based high-boiling solvents is not lost. 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.

In the present invention, a solvent-soluble polymer is contained in the ink absorbing layer to obtain an ink jet recording material for a non-aqueous ink.

As a method for incorporating the solvent-soluble polymer, it is preferable to dissolve the polymer in an appropriate organic solvent and coat or impregnate the polymer, and it is more preferable to incorporate the polymer by coating. This is because the solvent-soluble polymer can be concentrated on the surface portion of the recording material to more preferably exhibit 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.

As a method for applying the solvent-soluble polymer, a commonly used coating method such as a roll coater, an air knife coater, a blade coater, a rod coater, a bar coater, a gravure coater, a curtain coater and the like can be mentioned. 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, polypropylene and other transparent films, or those filled with white pigments, or films that are whitened by fine firing or Synthetic paper, general paper, coated paper, baryta paper, resin-coated paper and the like are used. Further, glass, aluminum foil, vapor-deposited paper, vapor-deposited film, fabrics and the like are not particularly limited as long as they can be provided with an ink-absorbing layer, but in an embodiment in which a gloss finish layer is provided by casting. A support such as air-permeable paper is preferred.

In the present invention, an anchor layer may be provided on the surface of the support for the purpose of improving the adhesion to the undercoat layer. A hydrophilic binder such as gelatin, a solvent-soluble binder such as polyvinyl butyral, a latex,
A curing agent, a pigment, a surfactant 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 pegazole (manufactured by Mobil Petroleum Co., Ltd.), Shell SBR, and Shell Sol (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 the 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.

[0048]

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.

(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
After preparing 1.0 part of a commercially available cationized starch and 0.5 part of a sulfuric acid band, the support was obtained using a Fourdrinier paper machine with a basis weight of 90 g / m ² .

(Preparation of Undercoat Layer Coating Solution A) Average Particle Size 0.8
100 parts by weight of barium sulfate (μm) and 8 parts by weight of polyvinyl alcohol were sequentially blended to prepare “undercoat layer coating liquid A”.

(Preparation of Undercoat Layer Coating Solution B) 100 parts by weight of light calcium carbonate (Albagross: particle size: 0.6 to 0.8 μm, manufactured by Mintec Japan) and 8 parts by weight of polyvinyl alcohol were sequentially blended. "Undercoat layer coating liquid B" was prepared.

(Preparation of Undercoat Layer Coating Solution C) 100 parts by weight of titanium oxide (Taipec R-820: particle size 0.25 μm, manufactured by Ishihara Sangyo Co., Ltd.) and 8 parts by weight of polyvinyl alcohol were sequentially blended. A coating liquid C "was prepared.

(Preparation of Undercoat Layer Coating Solution D) Kaolin (Amazon-88: particle size of 2 μm or less, manufactured by Mitsubishi Corporation)
00 parts by weight and 8 parts by weight of polyvinyl alcohol were sequentially blended to prepare a “undercoat layer coating liquid D”.

(Preparation of Ink Absorbing Layer Coating Solution a) Water 580
While stirring the silica sol (Snowtex-O:
Solid content 20%, Nissan Chemical Industry Co., Ltd. 150 parts, synthetic amorphous silica (Mizukasil P78F: Mizusawa Chemical Industry Co., Ltd.) 100 parts, fluorescent brightener (Kycoll BBL:
Solid content 50%, Nippon Soda Co., Ltd. 2 parts, polyvinyl alcohol (PVA-117: Kuraray Co., Ltd.) 1
250 parts of 0% aqueous solution, dimethylamine-epichlorohydrin condensate (Katiomaster PD-10: solid content 50
%, Manufactured by Yokkaichi Gosei Co., Ltd.) in an order of 50 parts to prepare "ink absorbing layer coating liquid a".

(Preparation of Ink Absorbing Layer Coating Solution b) Water 28
While stirring 5.5 parts, silica sol (Snowtex XL: solid content 40%, manufactured by Nissan Chemical Industries, Ltd.) 250
Parts, styrene-butadiene latex (JSR-06
91: 48% solids, manufactured by Japan Synthetic Rubber Co., Ltd.)
5 parts of potassium oleate and 2 parts of potassium oleate were sequentially added to prepare “ink absorbing layer coating liquid b”.

(Preparation of Solvent-Soluble Polymer Coating Solution) In a four-necked flask equipped with a stirrer, xylene 1 was used as a solvent.
The mixture was heated to 70 ° C. in a water bath while passing nitrogen. Here, 5 parts of 2,2'-azobis (2-methylbutyronitrile) is added as a polymerization initiator, and a mixture of 50 parts of lauryl methacrylate + 50 parts of isobornyl methacrylate is dropped over 4 hours, and the dropping is completed. After 7 more
Maintained at 0 ° 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. This polymer solution is spread thinly on a glass plate, dried at 80 ° C., and the dried film is peeled off to obtain a 4 times weight of Isopar G.
To dissolve. Also, this polymer solution is
After being dried using a rotary evaporator, it was dissolved in Isopar G and adjusted to a concentration of 20%.
A “solvent-soluble polymer coating liquid” was prepared.

Example 1 "Undercoat layer coating solution A" was coated on the support prepared above using a wire bar so that the dry coating amount was 15 g / m ² , The layer coating solution a "was applied using a wire bar so that the dry coating amount was 5 g / m ² . The “solvent-soluble polymer coating liquid” was applied thereon using a wire bar so that the dry coating amount was 5 g / m ² , thereby obtaining an ink jet recording material for a non-aqueous ink of Example 1.

Example 2 The procedure of Example 1 was repeated, except that “undercoat layer coating liquid B” was used instead of “undercoat layer coating liquid A”. An ink jet recording material for a water-based ink was obtained.

Example 3 The procedure of Example 1 was repeated, except that “Undercoat layer coating liquid C” was used instead of “Undercoat layer coating liquid C”. An ink jet recording material for a water-based ink was obtained.

Example 4 The procedure of Example 1 was repeated, except that “Undercoat layer coating liquid D” was used instead of “Undercoat layer coating liquid A”. An ink jet recording material for a water-based ink was obtained.

Example 5 "Undercoat layer coating liquid A" was coated on the support prepared above using a wire bar so that the dry coating amount was 15 g / m ² , The layer coating solution a "was applied using a wire bar so that the dry coating amount was 5 g / m ² . Further, “coating liquid b for ink absorbing layer” was applied thereon using a wire bar so that the dry coating amount was 3 g / m ² . This was subjected to a super calender treatment at a linear pressure of 1,862 N / cm, and a “solvent-soluble polymer coating liquid” was coated thereon using a wire bar so that the dry coating amount was 5 g / m ^2. Inkjet recording material for non-aqueous ink No. 5 was obtained.

Example 6 The procedure of Example 5 was repeated, except that “Undercoat layer coating liquid B” was used instead of “Undercoat layer coating liquid A”. An ink jet recording material for a water-based ink was obtained.

Example 7 The procedure of Example 5 was repeated, except that “Undercoat layer coating liquid C” was used instead of “Undercoat layer coating liquid A”. An ink jet recording material for a water-based ink was obtained.

Example 8 The procedure of Example 5 was repeated, except that “Undercoat layer coating liquid D” was used instead of “Undercoat layer coating liquid A”. An ink jet recording material for a water-based ink was obtained.

Example 9 The undercoat layer coating solution A was applied on the support prepared above using a wire bar so that the dry coating amount was 15 g / m ^2, and the ink coating was performed. The layer coating solution a "was applied using a wire bar so that the dry coating amount was 5 g / m ² . Further, “coating liquid b for ink absorbing layer” was applied thereon using a wire bar so that the dry coating amount was 3 g / m ^2, and while the coating layer was in a wet state, the surface temperature was lowered. 90
It was dried by pressing against a mirror surface roll at a temperature of ° C. The “solvent-soluble polymer coating liquid” was applied thereon using a wire bar so that the dry coating amount was 5 g / m ² , whereby an ink jet recording material for non-aqueous ink of Example 9 was obtained.

Example 10 The procedure of Example 9 was repeated, except that “Undercoat layer coating liquid B” was used instead of “Undercoat layer coating liquid A”. An ink jet recording material for a water-based ink was obtained.

Example 11 The procedure of Example 9 was repeated, except that “Undercoat layer coating liquid C” was used instead of “Undercoat layer coating liquid A”. An ink jet recording material for a water-based ink was obtained.

Example 12 The procedure of Example 9 was repeated, except that “Undercoat layer coating liquid D” was used instead of “Undercoat layer coating liquid A”. An ink jet recording material for a water-based ink was obtained.

Comparative Example 1 The undercoat layer coating liquid A was coated on the support prepared above using a wire bar so that the dry coating amount was 15 g / m ^2, and further, “ink absorption”. The layer coating liquid “a” was applied using a wire bar so that the dry coating amount was 5 g / m ^2, and was used as it was to obtain an inkjet recording material for a non-aqueous ink of Comparative Example 1.

Comparative Example 2 The same procedure as in Comparative Example 1 was carried out except that “Undercoat layer coating liquid B” was used instead of “Undercoat layer coating liquid A” in Comparative example 1. An ink jet recording material for a water-based ink was obtained.

Comparative Example 3 The same procedure as in Comparative Example 1 was repeated except that “Undercoat layer coating liquid C” was used instead of “Undercoat layer coating liquid A”. An ink jet recording material for a water-based ink was obtained.

Comparative Example 4 The same procedure as in Comparative Example 1 was carried out except that “Undercoat layer coating liquid D” was used instead of “Undercoat layer coating liquid A” in Comparative example 1. An ink jet recording material for a water-based ink was obtained.

Comparative Example 5 "Undercoat layer coating solution A" was coated on the support prepared above using a wire bar so that the dry coating amount was 15 g / m ² , The layer coating solution a "was applied using a wire bar so that the dry coating amount was 5 g / m ² . Further, “coating liquid b for ink absorbing layer” was applied thereon using a wire bar so that the dry coating amount was 3 g / m ² . This was subjected to a super calender treatment at a linear pressure of 1,862 N / cm to obtain an inkjet recording material for a non-aqueous ink of Comparative Example 5.

Comparative Example 6 The procedure of Comparative Example 6 was repeated except that “Undercoat layer coating liquid B” was used instead of “Undercoat layer coating liquid A”. An ink jet recording material for a water-based ink was obtained.

Comparative Example 7 The procedure of Comparative Example 5 was repeated except that “Undercoat layer coating liquid C” was used instead of “Undercoat layer coating liquid C”. An ink jet recording material for a water-based ink was obtained.

Comparative Example 8 The same procedure as in Comparative Example 5 was repeated except that “Undercoat layer coating liquid D” was used instead of “Undercoat layer coating liquid A”. An ink jet recording material for a water-based ink was obtained.

Comparative Example 9 "Undercoat layer coating solution A" was coated on the support prepared above using a wire bar so that the dry coating amount was 15 g / m ² , The layer coating solution a "was applied using a wire bar so that the dry coating amount was 5 g / m ² . Further, “coating liquid b for ink absorbing layer” was applied thereon using a wire bar so that the dry coating amount was 3 g / m ^2, and while the coating layer was in a wet state, the surface temperature was lowered. 90
The ink-pressed material for non-aqueous ink of Comparative Example 9 was obtained by using the material which was dried by pressing against a mirror-finished roll at ℃.

Comparative Example 10 The same procedure as in Comparative Example 9 was repeated except that “Undercoat layer coating liquid B” was used instead of “Undercoat layer coating liquid A”. An ink jet recording material for a water-based ink was obtained.

Comparative Example 11 The same procedure as in Comparative Example 9 was carried out except that “Undercoat layer coating liquid C” was used instead of “Undercoat layer coating liquid A”. An ink jet recording material for a water-based ink was obtained.

Comparative Example 12 The same procedure as in Comparative Example 9 was carried out except that “Undercoat layer coating liquid D” was used instead of “Undercoat layer coating liquid A”. An ink jet recording material for a water-based ink was obtained.

Comparative Example 13 On the support prepared above, "ink absorbing layer coating liquid a" was coated using a wire bar so that the dry coating amount was 5 g / m ² . A “solvent-soluble polymer coating liquid” was applied thereon using a wire bar so that the dry coating amount was 5 g / m ² , to obtain an ink jet recording material for a non-aqueous ink of Comparative Example 13.

Comparative Example 14 "Ink absorbing layer coating liquid a" was coated on the support prepared above using a wire bar so that the dry coating amount was 5 g / m ² . The “ink absorbing layer coating liquid b” was applied thereon using a wire bar so that the dry coating amount was 3 g / m ² . This was subjected to a super calender treatment at a linear pressure of 1,862 N / cm, and a “solvent-soluble polymer coating liquid” was coated thereon using a wire bar so that the dry coating amount was 5 g / m ^2. 14 non-aqueous ink-jet recording materials for ink were obtained.

Comparative Example 15 "Ink absorbing layer coating liquid a" was coated on the support prepared above using a wire bar so that the dry coating amount was 5 g / m ² . On top of this, “ink absorbing layer coating liquid b”
Was coated using a wire bar so that the dry coating amount was 3 g / m ^2, and while the coating layer was in a wet state, it was pressed against a mirror-surface roll having a surface temperature of 90 ° C. and dried. Comparative Example 1 was coated with a “solvent-soluble polymer coating liquid” thereon using a wire bar so that the dry coating amount was 5 g / m ^2.
Inkjet recording material for non-aqueous ink No. 5 was obtained.

COMPARATIVE EXAMPLE 16 An ink-absorbing layer coating liquid a was applied on the support prepared above using a wire bar so that the dry coating amount was 5 g / m ² . Ink-jet recording materials for a non-aqueous ink of Comparative Example 16 were obtained.

Comparative Example 17 The ink-absorbing layer coating liquid a was coated on the support prepared above using a wire bar so that the dry coating amount was 5 g / m ² . The “ink absorbing layer coating liquid b” was applied thereon using a wire bar so that the dry coating amount was 3 g / m ² . This was subjected to a super calender treatment at a linear pressure of 1862 N / cm to obtain an inkjet recording material for a non-aqueous ink of Comparative Example 17.

Comparative Example 18 "Ink absorbing layer coating liquid a" was coated on the support prepared above using a wire bar so that the dry coating amount was 5 g / m ² . The “ink-absorbing layer coating liquid b” was applied thereon using a wire bar so that the dry coating amount was 3 g / m ^2, and while the coating layer was wet, the surface temperature was 9 g / m ^2.
The ink-jet recording material for a non-aqueous ink of Comparative Example 18 was obtained by directly using the material which was pressed against a mirror surface roll at 0 ° C. and dried.

Comparative Example 19 "Undercoat layer coating liquid A" was coated on the support prepared above using a wire bar so that the dry coating amount was 30 g / m ² , The “solvent-soluble polymer coating liquid” was applied using a wire bar so that the dry coating amount was 5 g / m ² , whereby an ink jet recording material for a non-aqueous ink of Comparative Example 19 was obtained.

Comparative Example 20 The undercoat layer coating solution A was applied on the support prepared above using a wire bar so that the dry coating amount was 30 g / m ² . An ink jet recording material for a non-aqueous ink of Comparative Example 20 was obtained.

Examples 1 to 1 produced as described above
2. Regarding the inkjet recording materials for non-aqueous inks of Comparative Examples 1 to 20, an inkjet printer (PJ36) was used.
00: Olympus Optical Kogyo Kogyo Co., Ltd.), a single color (cyan, magenta, yellow, black), a two-color (cyan + magenta, magenta + yellow, cyan + yellow), a three-color (cyan + magenta) (+ Yellow) square solid printing pattern was printed and evaluated by the following methods. The results are shown in Tables 1 and 2.

(Evaluation Method) (Fixing Property) The evaluation of “fixing property” was made by rubbing the surface of the solid printed portion of the black ink once with an index finger once in one direction, and the colorant spread over the surrounding white paper (unprinted) portion. A sample that was not removed (good fixability) was marked with “○”, a colorant that had no practical problem but slightly spread the color was rated “△”, and a colorant that dropped off from the surface (poor fixability) was rated “x”. And

(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 colors and three colors, and three colors.
A sample that could be printed without any ink overflow was marked with “○”, an ink that slightly overflowed and caused print unevenness was marked with “△”, and one that overflowed with ink printed was marked with “x”.

(Ink strike-through) Evaluation of “ink strike-through” was performed by observing the solid printed portion of the three-color superimposed color from the back side of the printing surface, and visually observing the degree of strike-through 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.

(Bleedability) The evaluation of "bleedability" is as follows.
The bleeding of the ink solvent from around the printing portion 24 hours after the solid printing portion where the three colors were superimposed was visually observed and evaluated, and when no bleeding was observed, “○” was found, and slight bleeding occurred. The sample was marked with “△” and the sample with clear bleeding was marked with “×”.

(Glossiness) The glossiness was evaluated using a glossmeter (Model GM-26D, manufactured by Murakami Color Research Laboratory Co., Ltd.).
It represents the glossiness measured by the method of Z-8741.

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[Table 1]

[0096]

[Table 2]

A non-aqueous ink-jet recording material for a non-aqueous ink, comprising at least one ink absorbing layer provided on a support and coating or impregnating a solvent-soluble polymer on the ink absorbing layer. Examples 1 to 12 are provided with an undercoating layer containing at least one pigment selected from the group consisting of barium sulfate, calcium carbonate, titanium oxide, and kaolin. Prevents seepage of ink and bleeding of ink solvent from around the printed part due to aging (bleeding property)
And a non-aqueous ink jet recording material having excellent fixability. Comparative Examples 1 to 12, 16 to 18, 20
Has no solvent-soluble polymer layer, and thus has poor fixability. In Comparative Examples 13 to 18, since there was no undercoat layer, the strike-through of the ink was poor, and the bleeding property was also poor. Comparative Example 19
Since there was no ink absorbing layer, the ink absorbency of the triple color portion was poor.

[0098]

According to the present invention, it is possible to provide an ink-jet recording material for a non-aqueous ink, which prevents the strike-through of the non-aqueous ink to the base paper side and is excellent in fixability, ink absorption and bleeding properties. .

Claims (3)

[Claims] 1. A non-aqueous ink jet recording material for a non-aqueous ink, comprising at least one ink absorbing layer provided on a support, and a polymer which dissolves or swells with a petroleum-based high boiling point solvent on the ink absorbing layer. An undercoat layer containing at least one pigment selected from the group consisting of barium sulfate, calcium carbonate, titanium oxide, and kaolin between the ink absorbing layer and the ink absorbing layer. 2. The ink jet recording material for a non-aqueous ink according to claim 1, wherein the outermost layer of the ink absorbing layer is a gloss developing layer. 3. The non-aqueous ink jet recording material for non-aqueous ink according to claim 2, wherein the glossy layer is provided with a gloss by being pressed and dried on a heated mirror roll while the glossy layer is wet. .