JP2002264484A - Ink jet recording medium for non-water ink and recording method using the recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink jet recording medium for a non-water ink, which is best suited for ink jet recording using an ink obtained by dissolving or dispersing a coloring agent in a non-water solvent such as a hydrocarbon solvent and has a high gloss. SOLUTION: In the ink jet recording medium for the non-water ink with a gloss generating layer having solvent absorbing characteristics formed on a support, at least one kind of chemical compound selected from the group consisting of chemical compounds represented by formulae (1) and (2) is added.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an ink jet recording medium and an ink jet recording method. More specifically, the present invention relates to an ink jet recording medium suitable for ink jet recording using an ink in which a colorant is dissolved or dispersed in a hydrocarbon solvent which is a non-aqueous solvent, and an ink jet recording method having high definition of a recorded image. .

[0002]

2. Description of the Related Art Ink-jet recording is a technique for recording images and characters by causing minute droplets of ink to fly and adhere to a recording medium such as paper according to various operating principles. Ink-jet recording has features such as high speed, low noise, easy multi-coloring, great flexibility in recording patterns, and no need for development-fixing. It has various uses as a recording device for characters, figures, color images, etc. Are rapidly spreading.

Conventionally, in ink-jet recording, aqueous ink, that is, water or a mixed solvent of water and a hydrophilic solvent,
An ink in which a coloring agent such as a dye or a pigment is dispersed or dissolved has been used. However, the inkjet recording using the water-based ink has various problems caused by the printing portion of the recording medium absorbing and expanding the solvent in the ink. Such elongation of the recording medium is caused by hydrogen bonds between the fibers maintaining the mechanical strength of the support, which are cut by the solvent of the aqueous ink, particularly water, and adversely affects the conveyance of the recording medium in the printer. In addition, the accuracy of the relative positional relationship between the recording medium and the print head is deteriorated, and undesired phenomena such as a decrease in the dimensional accuracy of the obtained drawing and an unevenness in the image are caused.

To solve such a problem, Japanese Patent Laid-Open Publication No.
No. 0660, 57-10661,
In JP-A-202324 and JP-A-5-331397, it is proposed to use a non-aqueous ink in which a coloring agent is dissolved or dispersed in a non-aqueous solvent such as an isoparaffin hydrocarbon. According to these proposals, it is possible to perform ink jet recording with high dimensional accuracy and no unevenness in an image without any extension of the recording medium. 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 medium used for ink-jet recording using such a non-aqueous ink, Japanese Patent Application Laid-Open No. 64-2478 is disclosed.
Japanese Patent Application Laid-Open No. 5 (1993) -2005 and others propose a recording medium comprising an oil-absorbing inorganic pigment, an organic pigment and an aqueous adhesive.
JP-A-255580 proposes a recording medium comprising silica and an adhesive. These recording media are
This was a so-called mat coat type recording medium having a matte appearance on the recording surface.

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 medium having a texture similar to that of a silver halide photograph print, that is, a glossy surface has been desired. Naturally, such a recording medium has a high density of the recorded image and a high definition of the recorded image at the same time as having a gloss, 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 high fixability.

In order to meet such a demand, an ink jet recording using an aqueous ink is disclosed in
JP-A-5680 and JP-A-5-59694 have proposed an ink jet recording medium provided with a coating layer by a cast coating method, and JP-A-6-155892 and the like have disclosed polyvinyl alcohol on a similar recording medium. There has been proposed a recording medium having a film formed of a water-soluble polymer such as the above. Further, JP-A-6-199035 and the like propose a recording medium in which an ink receiving layer made of pseudo-boehmite is provided on a support. According to these proposals, an ink jet recording medium having high gloss and high absorptivity for water-based ink can be obtained, but even if recording is performed on these recording media with a non-aqueous ink, the recording medium Since there is no affinity between the material forming the ink and the solvent or colorant contained in the ink, the ink components cannot penetrate into the recording medium from the recording medium surface, and the ink is repelled on the surface of the recording medium. It is impossible to obtain a recorded image with high density, high definition, and excellent storability, such as low image density, unevenness, and easy removal of the colorant with slight friction. there were.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to provide a glossy, high-density and high-definition recorded image for use in ink-jet recording using such a non-aqueous ink.
Another object of the present invention is to provide an ink jet recording medium having high fixability of a colorant. Another problem of the present invention is that
An object of the present invention is to provide an ink jet recording method which is extremely excellent in terms of gloss of printed matter, definition of a recorded image, and the like.

[0009]

Means for Solving the Problems The inventors of the present invention have studied various types of ink jet recording media in order to solve the above-mentioned problems, and have achieved the object of the present invention by using the following structures. This makes it possible to provide an inkjet recording medium for a non-aqueous ink having gloss, high density and definition of a recorded image, and high fixability of a colorant.

That is, a glossy layer having a solvent-absorbing property is provided on a support and contains at least one compound selected from the compounds represented by the following general formulas (1) and (2). And a non-aqueous ink jet recording medium.

[0011]

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In the general formula (1), R ¹ is an optionally substituted alkyl group having 2 to 20 carbon atoms, an optionally substituted alkoxyl group having 1 to 20 carbon atoms, and optionally substituted. Selected from phenyl groups, m is from 0 to 50
Is an integer.

[0013]

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In the general formula (2), R ² is selected from an optionally substituted alkyl group having 2 to 20 carbon atoms and an optionally substituted phenyl group, p is not 0, and p + q
Is an integer of 1 to 50.

Further, in the ink jet recording medium for non-aqueous ink of the present invention, it is preferable to provide an ink absorbing layer between the support and the glossy layer.

In addition, it is preferable that the glossy layer is formed by a casting method.

A non-aqueous ink jet recording medium having a solvent-absorbing glossy layer provided on a support, wherein the compound is selected from compounds represented by formulas (1) and (2). The present invention provides an ink jet recording method characterized in that an image is formed by applying a colored particle dispersion using a hydrocarbon solvent as a dispersion medium to a recording medium containing at least one of the following.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a gloss developing layer comprises
It has the effect of improving the smoothness of the surface of the recording medium and developing gloss.

The compounds represented by the general formulas (1) and (2) are compounds having an affinity for a hydrocarbon solvent or a colorant as a solvent in the ink. It is not clear why the compound is contained in the recording medium, so that the density and definition of the recorded image after printing are high and the fixability of the coloring agent is high, but the compound is printed due to its affinity. Thereafter, to promote the penetration of the solvent and the colorant in the ink into the layer containing the compound, to reduce the time for which they remain on the recording medium surface, and to uniform the colorant distribution inside the recording medium. It is thought that this has the effect of improving the density and definition of the recorded image and improving the fixability of the colorant to the recording medium.

In performing inkjet recording using the inkjet recording medium for a non-aqueous ink of the present invention,
In particular, when high definition is required, it is preferable to provide an ink absorbing layer between the support and the glossy layer. By providing the ink absorbing layer, the fixing ability of the colorant in the recording medium is improved, and it is possible to prevent the colorant from moving in the recording medium and causing a decrease in the density and unevenness of the recorded image. It is.

As a method for forming the glossy layer in the present invention, after the coating composition for the glossy layer is applied, while the coating composition is in a wet state, or once dried and then rewet, When the so-called casting method is used, in which the surface of the mirror roll is transferred to the gloss-developing layer by pressing against the mirror-finished roll, the gloss appearance of the non-aqueous ink jet recording medium of the present invention is further excellent, and the recording after printing is performed. This is preferable because the density and definition of the image are higher and the fixability of the colorant is higher. This is presumably because the glossy layer formed by the present method contains many crack-like pores, into which the compounds represented by the general formulas (1) and (2) penetrate. . When the size of the fissured pores in the width direction observed by a scanning electron microscope is in the range of 50 nm to 5 μm, the colorant is glossy, has high density and fineness of a recorded image after printing, and has a colorant. , A recording medium having high fixability can be obtained.

The inventors of the present invention have, on a support, a gloss-developing layer having at least a solvent-absorbing property and at least one compound selected from the compounds represented by formulas (1) and (2). By applying a colored particle dispersion using a hydrocarbon solvent as a dispersion medium to a recording medium containing to form an image, it is possible to obtain a high-definition recorded image which was impossible with a conventional recording method. I found that it would be possible. The advantages obtained by the non-aqueous solvent used in the ink jet recording are as described above.However, the coloring agent is not a dye, but by using colored particles such as a pigment, image bleeding or the like does not occur. Thus, a recorded image with higher definition can be obtained.

Hereinafter, the components of the present invention will be described in detail.

Specific examples of the compound represented by the general formula (1) to be contained in the ink jet recording medium for a non-aqueous ink of the present invention are shown by the chemical formulas (3) to (12), but are not limited thereto.

[0025]

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[0026]

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[0027]

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[0028]

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[0029]

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[0030]

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[0031]

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[0032]

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[0033]

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[0034]

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Specific examples of the compound represented by the general formula (2) to be contained in the ink jet recording medium for a non-aqueous ink of the present invention are shown by the following chemical formulas (13) to (18), but are not limited thereto.

[0036]

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[0037]

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[0038]

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[0039]

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[0040]

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[0041]

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In the present invention, when the layer containing at least one compound selected from the compounds represented by the general formulas (1) and (2) also contains components other than the compound, the density of the recorded image can be further improved. In order to obtain a high definition inkjet recording medium for non-aqueous ink, the compound is:
In a layer already formed from other components, 50% by volume or more, more preferably 75% by volume or more of the active ingredient excluding the volatile component is contained by applying a coating composition comprising the compound. It is preferable to be able to exercise. this is,
This is because the effect of including the compound can be more preferably exerted by causing the compound to be concentrated in a portion where the liquid permeates from the surface of the recording medium most quickly.

As a method of applying the compounds represented by the general formulas (1) and (2), when the solution viscosity of the compound alone is low and the compound is suitable for coating, the solution of the compound alone may be used as it is. When the viscosity is high, the compound is dissolved in an appropriate organic solvent, or as a coating composition of various forms, such as an aqueous dispersion of fine particles, so-called latex, and then coated by various known methods. A construction method can be used.

The content of the compounds represented by formulas (1) and (2) in the non-aqueous ink jet recording medium of the present invention is preferably 0.3 to 50 g / m ^2, and 1 to ²⁰ g / m ^2. m ² is particularly preferred.
If the content is less than this range, uneven distribution and insufficient penetration of the colorant in the recording medium will occur, resulting in a reduction in the definition and density of the recorded image and a decrease in fixability,
If the content is more than this range, the ink absorption speed becomes insufficient, and undesired unevenness occurs in the image.

The coating composition containing at least one compound selected from the compounds represented by the general formulas (1) and (2) in the present invention may be dissolved in a hydrocarbon solvent if necessary. A mixture of polymers 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, There are polymers such as petroleum resins (C5 and C9), novolak resins, gutta percha, and copolymers composed of monomers constituting these polymers.

These polymers may be subjected to various modifications as long as the solubility in the hydrocarbon solvent 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, monomers such as styrene, By copolymerizing with a monomer constituting the polymer of (1), a polymer soluble in a hydrocarbon solvent can be modified.

The gloss-developing layer having solvent absorbency of the ink jet recording medium of the present invention is usually formed of various colloidal particles, and the solvent absorbency is exhibited by voids existing between the colloidal particles.

Various colloidal particles can be used for forming the glossy layer. As an example, pseudo-boehmite, inorganic colloid particles composed of alumina (hydrate) such as boehmite, silica, titania, etc., among them, colloid particles composed of alumina and silica have a binding force between colloid particles. It is particularly preferably used because a glossy layer having strong and high mechanical strength can be obtained.

Various methods can be used as a method for forming the glossy layer of the present invention from such colloidal particles. For example, alumina sol, a colloidal particle dispersion such as silica sol, or a coating composition obtained by mixing a suitable binder alone or after coating on a support, a method of simply drying, or a cast method, the non-aqueous system of the present invention It is possible to form a glossy layer of an ink jet recording medium for ink.

When an ink absorbing layer is provided between the support of the ink jet recording medium for non-aqueous ink of the present invention and the gloss developing layer, the ink absorbing layer can be formed from various materials. In particular, porous pigments are preferably used because they have a large ink absorption capacity and a high whiteness can be obtained by concealing the surface of the support.

Examples of such porous pigments include porous pigments composed of silica, titania, alumina and the like. Among them, porous pigments composed of silica and alumina absorb the solvent contained in the ink. High capacity,
It is particularly preferably used because of its high whiteness.

When the ink-absorbing layer is formed from these porous pigments, the average particle size by the Coulter counter method when the porous pigment is dispersed in water is 0.3 μm to 15 μm from the viewpoint of ink absorption. Preferably, it is 0.5 μm to 10 μm.
By setting the average particle size in this range, not only the pores inside the porous pigment particles but also the ink between the porous pigment particles is absorbed, so that the effect of providing the ink absorbing layer is more preferably exhibited. Is done. These porous pigments are applied alone or mixed with a suitable binder.

Various supports can be used for the support of the ink jet recording medium for non-aqueous ink in the present invention. For example, polyethylene terephthalate film, polyethylene terephthalate film, polycarbonate film, polypropylene film, various plastic films such as polyethylene film, aluminum foil, various metal foils such as tin foil, paper,
A fibrous material such as cloth and nonwoven fabric can be used as the support of the inkjet recording medium of the present invention.

Further, a sheet obtained by laminating different kinds of materials such as a polyethylene-coated paper and a metal-deposited plastic film such as a film obtained by evaporating aluminum on polyethylene terephthalate is also used as a support of the ink-jet recording medium for the water-insoluble ink of the present invention. be able to.

Of these, when paper is used as the support, the problem that the mechanical strength such as scratch resistance of the gloss-developing layer provided on the support is unlikely to decrease after printing hardly occurs. It is preferably used. This is presumed to be because the paper itself has absorptivity to the solvent, thereby preventing a decrease in the mechanical strength of the gloss developing layer due to the solvent remaining in the gloss developing layer for a long period of time.

The ink jet recording medium for a non-aqueous ink of the present invention may be provided, if necessary, with a layer other than the gloss developing layer and the ink absorbing layer, for example, an anchor coat layer for improving the adhesion between the ink absorbing layer and the support. An anti-blocking layer for suppressing surface blocking may be provided.
Further, a back coat layer can be provided for the purpose of improving transportability in a printer, suppressing curl generated after printing, and the like.

The non-aqueous ink in the present invention refers to an ink for an ink jet printer mainly containing a non-aqueous solvent, a colorant (pigment and / or dye), a dispersant and the like.
Non-aqueous solvents are those whose water content is substantially 5% by weight or less,
It contains not only a non-polar solvent but also a polar organic solvent.

The non-aqueous solvent may be selected so as to conform to the characteristics of the ink ejection head of the ink jet recording apparatus.
Alternatively, a hydrocarbon solvent, which is a non-polar solvent, is mainly used from the viewpoint of safety, and in some cases, a mixture of a plurality of types of solvents may be used.

Representative examples of such hydrocarbon solvents include the following: petroleum naphtha-based solvents such as Pegazol (manufactured by Mobil Petroleum Co., Ltd.), Shell SBR, and Shell Sol (manufactured by Shell Petrochemical Co., Ltd.). Solvents, aromatic petroleum solvents such as Hyssol (Nippon Oil Co., Ltd.),
Aliphatic petroleum solvents such as Solutol (manufactured by Philips Sekiyu KK), Exsol, Isopar (manufactured by Exxon Chemical Co., Ltd.), IP Solvent (manufactured by Idemitsu Petrochemical Co., Ltd.), and naphthenes such as ink solvent (manufactured by Mitsubishi Petroleum Corporation) And petroleum solvents.

Examples of the polar organic solvent include alcohols, especially long-chain alcohols, glycols, polyglycols, esters of glycols and polyglycols, ethers, especially mono- and di-alkyl ethers of glycols and polyglycols, ketones and the like. No. Also,
Esters of dicarboxylic acids, such as dioctyl sebacate, are also used.

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 Blue, Alkaline Blue Toner, Fast Yellow 10G, Orthonitroaniline Orange, Toluidine Red, Barium Red 2B, Calcium Red 2B, Pigment Scar Red 3B Lake, Anthosine 3B Lake, Rhodamine 6G Lake, Methyl Bio Red Lake, Basic Blue 5B Lake, Fast Sky Blue, Alkaline Blue R Toner, Navy Blue, Ultramarine Blue, 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 pigment,
Examples include pearl pigments and the like, and processed pigments obtained by surface-treating them 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.

[0063]

EXAMPLES Examples of the present invention will be described below, but the present invention is not limited to these examples. In this example, parts and% represent parts by weight and% by weight, respectively, unless otherwise specified.

Production Example 1 Alumina hydrate (pseudo-boehmite) sol (AS-
3) was dried using a spray dryer having an inlet temperature of 200 ° C. and an outlet temperature of 80 ° C. to obtain pseudo-boehmite powder. 20 parts of this pseudo-boehmite powder was charged into 80 parts of water, and dispersed using a homogenizer. In this dispersion,
Polyvinyl alcohol (degree of polymerization about 2400, degree of saponification 98
A coating liquid was prepared by adding 30 parts of a 10% aqueous solution of Kuraray Poval PVA-124) manufactured by Kuraray. This coating solution was applied on a 100 μm-thick white polyethylene terephthalate film (ULY-100 manufactured by Teijin) using a wire bar so that the coating amount after drying was 35 g / m ^2, and convection drying at 100 ° C. After preliminary drying until the fluidity of the coating liquid disappeared in an oven, the ink was dried in a hot air dryer at 120 ° C. to produce an inkjet recording medium of Production Example 1.

Production Example 2 80 parts of LBKP (freeness 400 ml CSF), NBKP
(Freeness 400 ml CSF) 20 parts, light calcium carbonate 8 parts, heavy calcium carbonate 8 parts, talc 8 parts, alkyl ketene dimer 0.1 part, cationic polyacrylamide 0.03 part, cationized starch 0.8 part Then, a slurry was prepared by mixing 0.4 parts of a sulfuric acid band and an appropriate amount of water, and a support having a basis weight of 90 g / m ² was prepared using a fourdrinier paper machine.

While stirring 580 parts of water, the silica sol
(Solid content 20%; Snowtex-O manufactured by Nissan Chemical Industries)
150 parts, 100 parts of synthetic amorphous silica (Mizukasil P78F, manufactured by Mizusawa Chemical Industry), 2 parts of optical brightener (solid content: 50%; Keikol BBL, manufactured by Nippon Soda), polyvinyl alcohol
(Polymerization degree about 1700, saponification degree 98-99%; Kuraray product Kuraray Povar PVA-117) 10% aqueous solution 250
Part, dimethylamine-epichlorohydrin condensate (solid content 50%; Kachiomaster PD-10 manufactured by Yokkaichi Gosei) 5
0 parts were sequentially blended to prepare a coating solution. This coating solution was applied to the support prepared above using a wire bar so that the coating amount after drying was 10 g / m ^2, and dried with a hot-air dryer at 120 ° C. to form an ink absorbing layer. Produced.

A coating solution was prepared by adding 1 part of a 5% boric acid aqueous solution to 100 parts of the coating solution of Preparation Example 1. Apply this coating solution at 50 ° C
Was heated, and applied onto the ink absorbing layer prepared above using a wire bar so as to have a wet coating amount of 200 g / m ^2, and immediately sprayed with cold air at 0 ° C. to gel,
Next, after preliminary drying in a convection dryer at 100 ° C., 12
It dried with the hot air type dryer of 0 degreeC, and produced the inkjet recording medium of the preparation example 2.

Preparation Example 3 While stirring 285.5 parts of water, silica sol (particle size 4
0 to 60 nm, solid content 40%; 250 parts of Nissan Chemical Industries Snowtex XL), styrene-butadiene-based latex (solid content 48%; JSR-0691 manufactured by Japan Synthetic Rubber)
62.5 parts and potassium oleate 2 parts were sequentially blended to prepare a coating solution. The coating amount of this coating liquid after drying with a wire bar was 3 g / m ² on the ink absorbing layer of Preparation Example ^2.
Then, it was pressed against a mirror-finished roll having a surface temperature of 90 ° C. and dried to obtain an inkjet recording medium of Production Example 3. When the surface of the recording medium was observed with a scanning electron microscope, the size in the width direction was 100 nm or more.
Crack-like pores of about 2.5 μm were inherent.

Example 1 A coating liquid was prepared by uniformly mixing 10 parts of the exemplified compound (5) with 30 parts of a hydrocarbon-based solvent (Isoper G, manufactured by Exxon Chemical). This coating liquid was applied to the ink jet recording medium prepared in Preparation Example 1 using a wire bar so that the coating amount after drying was 10 g / m ² , to prepare the ink jet recording medium of Example 1.

Example 2 An ink jet recording medium of Example 2 was produced in the same manner as in Example 1 except that the exemplified compound (6) was used instead of the exemplified compound (5).

Example 3 An ink jet recording medium of Example 3 was produced in the same manner as in Example 1 except that the exemplified compound (9) was used instead of the exemplified compound (5).

Example 4 An ink jet recording medium of Example 4 was produced in the same manner as in Example 1 except that the exemplified compound (13) was used instead of the exemplified compound (5).

Example 5 An ink jet recording medium of Example 5 was produced in the same manner as in Example 1 except that Exemplified Compound (14) was used instead of Exemplified Compound (5).

Comparative Example 1 The ink jet recording medium of Production Example 1 was used as it was.

Comparative Example 2 An ink jet recording medium of Comparative Example 2 was prepared in the same manner as in Example 1 except that the following comparative compound (19) was used instead of the exemplary compound (5).

[0076]

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Example 6 An ink jet recording medium of Example 6 was produced in the same manner as in Example 1 except that the ink jet recording medium produced in Production Example 2 was used instead of the ink jet recording medium produced in Production Example 1. .

Example 7 An ink jet recording medium of Example 7 was produced in the same manner as in Example 6, except that the exemplified compound (6) was used instead of the exemplified compound (5).

Example 8 An ink jet recording medium of Example 8 was produced in the same manner as in Example 6, except that the exemplified compound (9) was used instead of the exemplified compound (5).

Example 9 An ink jet recording medium of Example 9 was produced in the same manner as in Example 6, except that the exemplified compound (13) was used instead of the exemplified compound (5).

Example 10 An ink jet recording medium of Example 10 was produced in the same manner as in Example 6, except that the exemplified compound (14) was used instead of the exemplified compound (5).

Comparative Example 3 The ink jet recording medium of Production Example 2 was used as it was.

Comparative Example 4 An ink jet recording medium of Comparative Example 4 was produced in the same manner as in Example 6, except that Comparative Compound (19) was used instead of Exemplified Compound (5).

Example 11 An ink jet recording medium of Example 11 was produced in the same manner as in Example 1 except that the ink jet recording medium produced in Production Example 3 was used instead of the ink jet recording medium produced in Production Example 1. .

Example 12 An ink jet recording medium of Example 12 was produced in the same manner as in Example 11, except that the exemplified compound (6) was used instead of the exemplified compound (5).

Example 13 An ink jet recording medium of Example 13 was produced in the same manner as in Example 11, except that the exemplified compound (9) was used instead of the exemplified compound (5).

Example 14 An ink jet recording medium of Example 14 was produced in the same manner as in Example 11, except that the exemplified compound (13) was used instead of the exemplified compound (5).

Example 15 An ink jet recording medium of Example 15 was produced in the same manner as in Example 11, except that the exemplified compound (14) was used instead of the exemplified compound (5).

Comparative Example 5 The ink jet recording medium of Production Example 3 was used as it was.

Comparative Example 6 An ink jet recording medium of Comparative Example 6 was produced in the same manner as in Example 11, except that Comparative Compound (19) was used instead of Exemplified Compound (5).

Ink Preparation Example A To 70 parts of Isopar G, 15 parts of butyl benzoate and 5 parts of polyoxyethylene laurylamine (oxyethylene addition number: 7; Newcol 407 manufactured by Nippon Emulsifier) were added and mixed with stirring. Here, an oil-soluble black dye (C.I.
ent Black) was added and sufficiently stirred and dissolved to prepare an ink of Ink Preparation Example A in which an oil-soluble dye was dissolved in a hydrocarbon solvent.

Ink Preparation Example B 16 parts of a turpentine oil derivative resin (YS Polystar T80 manufactured by Yasuhara Chemical) was heated to 100 ° C., and 8 parts of a black pigment (CI Pigment Black 7) was added thereto. Kneaded well. Then
The kneaded product was cooled to room temperature and pulverized by a jet mill to obtain a surface-treated pigment. In 74 parts of Isopar, 2 parts of a dispersing agent (Nikkor TO-106 manufactured by Nippon Surfactant) was dissolved, and the above-mentioned surface-treated pigment was added thereto. The resultant was sufficiently dispersed by a ball mill, and the colored particles were dispersed in the hydrocarbon solvent. An ink of Ink Preparation Example B was prepared.

Evaluation The evaluation method for each item is shown below, and the evaluation results are shown in Tables 1 to 3. <Gloss> A gloss meter (GM-26D, manufactured by Murakami Color Research Laboratory) measures the 75 ° surface mirror gloss of each ink jet recording medium.
Was measured by (The larger the value, the stronger the gloss)

<Concentration> An excess amount of the ink of Preparation Example A was dropped on each ink jet recording medium, and the ink droplets were immediately developed using a wire bar having a liquid film thickness of 10 μm, and left at room temperature for 1 hour. Let dry. Then, the optical density near the center of the developed part was measured using an optical densitometer (RD-919, manufactured by Macbeth).
Was measured. (The higher the value, the higher the concentration)

<Definition> Each ink jet recording medium was kept horizontal, and the inner volume was 1 μL equipped with a needle having an inner diameter of 0.15 mm.
1 drop of the ink of the ink preparation example A was dropped using a micro syringe (manufactured by Hamilton 7101) and left to dry at room temperature for 1 hour. Use a microscope to inspect the surface of the ink drop
The image observed at (× 100) was analyzed by a LUZEX5000 type image analyzer (manufactured by Nireco), and a shape factor calculated by the following formula 1 was obtained. The smaller the shape factor is (closer to 1), the higher the roundness is,
A high-definition image without blur or omission is obtained when printing with a printer.

<Ink Absorption Rate> Each ink jet recording medium was tilted at 60 °, and one drop of the ink of Ink Preparation Example A was dropped using the same microsyringe as described above. The maximum diameter in the inclined direction and the maximum diameter in the horizontal direction of the ink dropping portion were measured, and the maximum diameter ratio represented by the following Expression 2 was obtained. A smaller value (closer to 1) means that the ink did not flow down the surface of the recording medium between the time it came in contact with the surface of the recording medium and was absorbed, that is, the faster the ink was absorbed. Thus, an image without unevenness can be obtained when printing with a printer.

<Fixing property> The surface of the ink developing section used for the density measurement was rubbed once in one direction with an index finger, and the colorant that did not spread around the original developing section (good fixing property) was evaluated as ○. A sample in which the colorant had spread but no apparent change in the density of the original developed portion was evaluated as "Poor", and a sample in which the density of the original developed portion was reduced (poor fixability) was evaluated as "Poor".

[0098]

[Formula 1] Shape factor = (contour length of ink dropping portion) ² / (4π × area of ink dropping portion) (Equation 1)

[0099]

## EQU2 ## Maximum diameter ratio = maximum diameter in the inclined direction / maximum diameter in the horizontal direction (Equation 2)

[0100]

[Table 1]

[0101]

[Table 2]

[0102]

[Table 3]

Examples 16 to 20 Ink Preparation Example A on the same recording medium as in Examples 11 to 15
Was evaluated in the same manner as described above except that the ink preparation example B was used in place of the above. Table 4 shows the evaluation results.

[0104]

[Table 4]

Examples 1 to 5, Comparative Examples 1 and 2, and Examples 6 to
10 and Comparative Examples 3 and 4 and Examples 11 to 15 and Comparative Examples 5 and 6
As is clear from the comparison, in an ink jet recording medium for a non-aqueous ink having a solvent-absorbing glossy layer provided on a support, it is selected from the compounds represented by the general formulas (1) and (2). By containing at least one compound, glossiness of the surface, high density of recorded images when used in ink jet recording using a non-aqueous ink using a hydrocarbon solvent, high definition, fixing of colorant It has become possible to provide an ink jet recording medium for a non-aqueous ink having both properties.

As is clear from comparison between Examples 1 to 5 and Examples 6 to 10, an ink absorbing layer is provided between the support of the ink jet recording medium for non-aqueous ink of the present invention and the gloss developing layer. As a result, the density of the recorded image is high,
It has become possible to provide an ink jet recording medium for non-aqueous ink with less unevenness.

As is apparent from a comparison between Examples 6 to 10 and Examples 11 to 15, a gloss-developing layer having an ink absorbing property of the non-aqueous ink jet recording medium of the present invention was formed by a casting method. As a result, it has become possible to provide an ink jet recording medium for a non-aqueous ink, which is excellent in gloss development, has higher density and definition of a recorded image after printing, and has even higher fixability of a colorant.

As is clear from a comparison between Examples 11 to 15 and Examples 16 to 20, a colored particle dispersion containing a hydrocarbon solvent as a dispersion medium was added to the non-aqueous ink jet recording medium of the present invention. The method of forming an image by applying the image makes it possible to obtain a high-definition recorded image which cannot be obtained by a conventional recording method.

[0109]

According to the present invention, ink-jet recording having gloss, high density and definition of a recorded image, and high fixability of a colorant for use in ink-jet recording using a non-aqueous ink. A medium can be provided. Further, it is possible to provide an ink jet recording method which is extremely excellent in terms of gloss of a printed matter, definition of a recorded image, and the like.

Claims (4)

[Claims] 1. An ink jet recording medium for a non-aqueous ink comprising a support provided with a glossy layer having a solvent-absorbing property, which is selected from compounds represented by the following general formulas (1) and (2). An ink jet recording medium for a non-aqueous ink, comprising at least one compound. Embedded image (In the general formula (1), R ¹ is an optionally substituted alkyl group having 2 to 20 carbon atoms, an optionally substituted alkoxyl group having 1 to 20 carbon atoms, and an optionally substituted phenyl group. And m is an integer from 0 to 50. (In the general formula (2), R ² is selected from an optionally substituted alkyl group having 2 to 20 carbon atoms and an optionally substituted phenyl group, p is not 0, and p + q is 1 to 5
It is an integer of 0. ) 2. The non-aqueous ink jet recording medium according to claim 1, wherein an ink absorbing layer is provided between the support and the gloss developing layer. 3. The ink jet recording medium for non-aqueous ink according to claim 1, wherein said glossy layer is formed by a casting method. 4. An ink jet recording medium for a non-aqueous ink, comprising a support and a gloss-developing layer having a solvent-absorbing property, wherein the compound is selected from the compounds represented by formulas (1) and (2). An ink-jet recording method comprising: applying a colored particle dispersion liquid containing a hydrocarbon solvent as a dispersion medium to a recording medium containing at least one of the following to form an image.