JPH1134479A - Recording media for inkjet printers - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording medium for an ink-jet printer having an interlayer compound for fixing and retaining a water-soluble dye by an intercalation reaction, and to provide a smooth conveyance property without double feeding. SOLUTION: The recording medium for an ink jet printer according to the present invention is a dye fixing layer comprising a base material, an interlayer compound formed on the base material and receiving and retaining a water-soluble dye by an intercalation reaction, and a binder. And the dye fixing layer has a content of 10 parts by weight to 1 part by weight based on 100 parts by weight of the binder.
Contains 00 parts by weight of surfactant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium for an ink jet printer having a dye fixing layer containing an interlayer compound which receives and retains a water-soluble dye in an aqueous ink for an ink jet printer by an intercalation reaction.

[0002]

2. Description of the Related Art Image information and character code information produced by a personal computer, a word processor, and the like are transferred to paper or an overhead projector (hereinafter, referred to as OHP).
One of the methods for outputting to a recording medium such as a film is an inkjet method in which an ink containing a water-soluble dye is discharged onto a recording medium from a recording nozzle driven by electric field, heat, pressure, or the like to form an image. A recording method is given.

[0003] This ink jet recording system has the advantages of low noise at the time of recording, low running cost, image formation on plain paper, and the absence of waste such as ink ribbon. In homes and homes, its use has been expanding in recent years.

A water-soluble dye constituting an image fixed on a recording medium by the ink jet recording method is generally held on the recording medium by van der Waals force or hydrogen bonding. For this reason, when a solvent such as water having a high affinity for the water-soluble dye comes into contact with the image, there is a problem that the water-soluble dye constituting the image is eluted into the solvent and the image is blurred. In addition, when thermal energy or water vapor is supplied to the recording medium that is sufficient to cancel van der Waals forces and hydrogen bonds between the water-soluble dye that forms the image and the recording medium, the water-soluble dye moves and There is a problem that blurring occurs. Further, when the water-soluble dye constituting the image is exposed to high-energy light such as ultraviolet light, the water-soluble dye itself is decomposed to cause discoloration, discoloration or a decrease in density of the image.

[0005] In order to improve the fixing property such as the water resistance of the image and the light resistance in such an ink jet recording system, a water-soluble dye is added to the dye fixing layer of the recording medium by an intercalation reaction based on an ion exchange action. JP-A-7-689 discloses that an intercalation compound which can be kept at a low temperature is compounded with a binder such as polyvinylpyrrolidone resin, polyvinylbutyral resin, hydroxypropylcellulose resin or polyvinyl alcohol resin.
No. 25 has proposed this. In this case, the water-soluble dye is firmly held between the interlayer compounds. The fixability of an image composed of a dye held between layers of an interlayer compound is greatly improved, and discoloration, discoloration and reduction in image density during image storage are improved.

[0006]

However, the ink jet recording medium formed in this manner is not designed to prevent static electricity, and the recording media set on the paper feed tray of the ink jet printer are not connected to each other. In some cases, sticking occurs due to electrostatic charging, causing a double feeding trouble in which two or more recording media are simultaneously fed.

The present invention has been proposed in view of such a conventional situation, and does not allow a double feed to a recording medium for an ink jet printer having an interlayer compound for fixing and retaining a water-soluble dye by an intercalation reaction. The purpose is to provide smooth transportability.

[0008]

A recording medium for an ink jet printer according to the present invention comprises a base material, an intercalation compound formed on the base material and receiving and retaining a water-soluble dye by an intercalation reaction, and a binder. And a dye fixing layer, wherein the dye fixing layer contains 10 to 100 parts by weight of a surfactant based on 100 parts by weight of the binder.

In this recording medium for an ink jet printer, the surfactant contained in the dye fixing layer acts to prevent the generation of static electricity.

[0010] A recording medium for an ink jet printer according to the present invention comprises a substrate, and a dye fixing layer formed on the substrate and containing an intercalation compound that accepts and retains a water-soluble dye by an intercalation reaction and a binder. An ink-absorbing layer formed on the dye-fixing layer, the ink-absorbing layer containing an ink-absorbing resin.
It is characterized by containing 10 to 100 parts by weight of a surfactant with respect to 0 parts by weight.

In this recording medium for an ink jet printer, the surfactant contained in the ink absorbing layer acts to prevent the generation of static electricity.

A recording medium for an ink jet printer according to the present invention comprises a substrate, and a dye fixing layer formed on the substrate and containing an interlayer compound that receives and retains a water-soluble dye by an intercalation reaction and a binder. Wherein the surface of the surface on which the dye fixing layer is formed is coated with a surfactant.

In this recording medium for an ink jet printer, the surfactant applied to the surface of the medium acts to prevent generation of static electricity.

A recording medium for an ink jet printer according to the present invention comprises a base material, a dye formed on one surface of the base material, and containing an interlayer compound for receiving and retaining a water-soluble dye by an intercalation reaction and a binder. A fixing layer, and a surfactant is applied to the other surface of the base material.

In this recording medium for an ink jet printer, the surfactant applied to the back surface of the medium acts to prevent generation of static electricity.

[0016]

Embodiments of the present invention will be described below.

As shown in FIG. 1, the recording medium for an ink jet printer according to the present invention has a substrate 1 and a dye fixing layer 2 formed on the substrate 1.

The substrate 1 can be arbitrarily selected from paper, synthetic paper, plastic film, metal plate, metal foil, and the like, and a plastic film on which aluminum or the like is vapor-deposited, or a substrate subjected to an easy-adhesion treatment with an organic resin or the like. Can be used. It should be noted that, for applications such as OHP, it is necessary to be light-transmitting.

The dye fixing layer 2 has a structure in which an interlayer compound that receives and holds a water-soluble dye by an intercalation reaction is dispersed in a binder.

In the present invention, the interlayer compound contained in the dye fixing layer 2 is preferably a layered inorganic polymer having a layered structure and having exchangeable ions between the layers.

Here, the exchangeable ion of the layered inorganic polymer is an exchangeable cation such as sodium ion when the water-soluble dye is a water-soluble cationic dye, and the water-soluble dye is a water-soluble anionic dye. In this case, it becomes an exchangeable anion such as a carboxyl anion.

Examples of the layered inorganic polymer having exchangeable cations (hereinafter referred to as cation exchangeable intercalation compounds) include natural or synthetic layered silicates or their calcined products. Can be preferably used a montmorillonite group mineral which is a kind of clay mineral having a 3-octahedral smectite structure and represented by the following chemical formula (1).

(X, Y) _m Z ₄ O ₁₀ (OH) ₂ .nH ₂ O. (W _1/3 ) (1) (where X is Al, Fe (III), Mn (III) or Co (III), Y is Mg, Fe (II), N
i, Zn or Li; Z is Si or Al;
Is K, Na or Ca, H ₂ O is interlayer water, and m is 2-3, and n represents an integer. Specifically, according to the combination of X and Y and the number of substitutions,
Montmorillonite, Magnesian Montmorillonite, Iron Montmorillonite, Iron Magnesian Montmorillonite,
Natural and synthetic products such as beidellite, aluminian beidellite, nontronite, aluminonnontronite, saponite, aluminian saponite, hectorite, and sauconite can be exemplified. In addition, those in which the OH group in the above chemical formula (1) is substituted with fluorine can also be used.

In the present invention, besides the montmorillonite group mineral of the chemical formula (1), mica group minerals such as sodium silicic mica, sodium teniolite and lithium teniolite can be used as the cation-exchange intercalation compound. .

As the cation-exchangeable intercalation compound having a layered structure like the synthetic clay mineral and having exchangeable cations, there are acidic salts such as zirconium phosphate and layered hydrous titanium oxide. Since they have optical concealability or a unique color, they can be used in a dye fixing layer where transparency, glossiness and whiteness are not simultaneously required.

When a fine white powder such as a synthetic silicon salt containing no impurities is used as the cation exchangeable intercalation compound as described above, the crystal itself is optically transparent. It is possible to form a dye fixing layer that realizes a high saturation comparable to the above.

The exchangeable cations present between the layers of the cation exchangeable intercalation compound used in the present invention include inorganic cations which are easily solvated in a high dielectric constant medium such as water or alcohol, for example, Li ⁺ , Na ⁺ , and K. ⁺ alkali metal ions such as, other like alkaline earth metal ions Mg ^2+, etc., H ⁺
Can be used. When H ⁺ is used, the cation exchangeable intercalation compound is a so-called clay acid. Of the alkaline earth metal ions, Ca ²⁺ and Ba ²⁺ tend to provide an interlayer that is less likely to solvate than the other inorganic ions described above.

In order to improve the dispersibility of the cation-exchange intercalation compound in the binder and to improve the swelling property of the cation-exchange intercalation compound in a non-aqueous solvent such as alcohol, a part of the exchangeable inorganic cation of the cation-exchange intercalation compound is improved. May be replaced with an organic cation. The effect of widening the interlayer distance by replacing a part of the exchangeable inorganic cation of the cation exchangeable interlayer compound with an organic cation (hereinafter, referred to as a pillar effect).
Also, an effect of partially hydrophobizing the interlayer is realized.

As the organic cation for partially replacing the exchangeable inorganic cation of the cation exchangeable intercalation compound, a quaternary ammonium ion or a phosphonium ion such as an alkylphosphonium ion or an arylphosphonium ion is preferably used. it can. Here, in the case of a quaternary ammonium ion, at least three of the four alkyl groups each preferably have 4 or more carbon atoms, and preferably 8 or more carbon atoms.

When the number of long-chain alkyls is small, the pillar effect is not sufficient, and it becomes difficult to secure an interlayer as a fixing site for exchangeable inorganic cations. For example, n
The use of octyltrimethylammonium ion is not preferred in the present invention because the layer spacing does not increase to more than about 4 angstroms even if it occupies most of the fixing site, and an excessively hydrophobic layer is provided.

In the present invention, the layered inorganic polymer having exchangeable anions (hereinafter referred to as anion-exchangeable layered compound) is a kind of 0: 1 type clay mineral,
Layered hydrotalcite group minerals composed of O ₆ octahedral sheets are preferred. A typical example of such hydrotalcite group minerals is a natural hydrotalcite represented by the following chemical formula (2).

Mg ₆ Al ₂ (OH) ₁₆ .CO ₃ .4H ₂ O (2) Although the composition of natural hydrotalcite represented by the above chemical formula (2) is slightly different from that of synthetic hydrotalcite, But it doesn't matter. The fine powder of the synthetic hydrotalcite does not contain impurities and exhibits a pure white color, but the crystal itself is optically transparent. When a fine powder of synthetic hydrotalcite is used, it is possible to form a dye fixing layer that realizes high saturation comparable to silver salt photography.

In addition to the above hydrotalcite group minerals, examples of the anion-exchangeable layered compound include hydrated oxides such as titanium, zirconium, lanthanum, and bismuth, and phosphate hydroxides. Since these hydrated oxides and hydroxyl phosphates have an optical masking property or a unique color, they can be used in a dye fixing layer which does not require transparency, glossiness and whiteness at the same time.

As the exchangeable anion to be present between the layers of the anion exchangeable intercalation compound used in the present invention, an inorganic anion or a hydrophilic organic anion which is easily solvated in a high dielectric constant medium such as water or alcohol is used. Can be. Examples of the inorganic anion include NO ₃ ⁻ , ClO ₄ ⁻ , and S
O ₄ ^2- , Fe (CN) ₆ ^4- , and heteropolyphosphate ions. Examples of the hydrophilic organic anion include a lower carboxylate ion. Note that higher carboxylate ions tend to provide interlayers that are more difficult to solvate than the aforementioned anions.

In order to improve the dispersibility of the cation-exchange intercalation compound in the binder and to improve the swellability of the cation-exchange intercalation compound in a non-aqueous solvent such as alcohol, a part of the exchangeable inorganic cation of the cation-exchange intercalation compound is improved. May be replaced with an organic cation. A pillar effect and an effect of partially hydrophobizing between layers are realized.

Examples of the organic cation which partially replaces the exchangeable inorganic cation of the cation exchangeable interlayer compound include a carboxylate anion, a sulfonate anion, an ester anion, and a phosphate anion.

The above-mentioned anions usually have an alkyl group or an alkenyl group, but when the number of carbon atoms is small, the pillar effect is not sufficient.
It becomes difficult to secure an interlayer as a fixing site for exchangeable inorganic anions. Further, if the amount is too large, substitution becomes difficult, so that the carbon number is preferably 5 to 20.

The binder is preferably an aqueous polyurethane emulsion resin, polyvinylpyrrolidone resin, hydroxypropylmethylcellulose resin, polyvinyl alcohol resin, ethylcellulose resin, gelatin, or the like.

The content of the organic resin in the binder is preferably not more than 90 parts by weight, more preferably not more than 60 parts by weight.

In the present invention, the dye fixing layer 2 may contain various additives used in the conventional dye fixing layer, if necessary.

These additives include a crosslinking agent, a plasticizer, an ultraviolet absorber, a fluorescent brightener, and other hydrophilic resins.

In the present invention, when the weight ratio of the intercalation compound to the binder in the dye fixing layer 2 is too small, the amount of the water-soluble dye retained by the intercalation reaction is reduced if the intercalation reaction is too small. Blurring occurs, and if it is too large, the amount of the binder relatively decreases and the adhesiveness and dispersibility of the dye fixing layer 2 decrease, so that it is preferably 1: 0.1 to 1: 2, more preferably 1: 1. 0.2 to 1: 1.5.

The thickness of the dye fixing layer 2 is usually 2 μm to 40 μm, preferably 4 μm to 15 μm.

As shown in FIG. 2, the ink jet recording medium of the present invention comprises a substrate 11, a dye fixing layer 12 formed on the substrate 11, and an ink formed on the dye fixing layer 12. It may have an absorption layer 13.

The ink absorbing layer 13 temporarily receives the attached ink and transmits it to the dye fixing layer, and is made of an ink absorbing resin.

Examples of the ink-absorbing resin include hydroxypropyl cellulose resin, gelatin, hydratable polyvinyl acetal resin, and polyvinyl pyrrolidone resin.

The thickness of the ink absorbing layer 13 is as follows.
If the thickness is too large, the ratio of the dye fixed to the dye fixing layer decreases,
Since the dye fixing property is deteriorated, it is usually 5 μm or less, preferably 3 μm or less.

The recording medium for an ink jet printer of the present invention contains a surfactant in the dye fixing layer. When the recording medium for an ink jet printer of the present invention has an ink absorbing layer formed on a dye fixing layer, the ink absorbing layer contains a surfactant.

Further, in the recording medium for an ink jet printer of the present invention, a surfactant may be applied to one surface of the medium on which a dye fixing layer or the like is formed or the other surface.

Here, the surfactant has a lipophilic group and a hydrophilic group in the molecular structure, and by the function of the hydrophilic group, retains water vapor existing in the air, improves conductivity, and generates static electricity. It has the effect of preventing. Surfactants are classified into anionic surfactants, cationic surfactants, and nonionic surfactants according to their main constituents.

Specific examples of the anionic surfactant include:
Fatty acid salt, alkyl sulfate salt, alkyl benzene sulfonate, alkyl naphthalene sulfonate, alkyl sulfosuccinate, alkyl diphenyl ether sulfonate, alkyl phosphate, polyoxyethylene alkyl, alkyl sulfate ester salt, alpha olefin sulfonate , Alkyl ether sulfate, phenyl ether sulfate, methyl taurate, sulfosuccinate, ether sulfonate, sulfated oil and the like.

Examples of the cationic surfactant include an alkylamine salt, a quaternary ammonium salt, an alkyl betaine, an amine oxide and the like.

As nonionic surfactants, polyoxyethylene alkyl ether, polyoxyethylene alkyl allyl ether, polyoxyethylene derivative, oxyethylene-oxypropylene block copolymer, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene Examples include nonionic surfactants such as ethylene sorbitol fatty acid ester, glycerin fatty acid ester, polyoxyethylene fatty acid ester, polyoxyethylene alkylamine, alkyl alkanolamide, nonylphenol fatty acid ester, and alkylamine oxide.

When the surfactant is contained in the dye-fixing layer or the ink-absorbing layer, the content of the surfactant is preferably from 10 to 100 parts by weight based on 100 parts by weight of the binder in the dye-fixing layer, It is preferable that the amount is 10 parts by weight to 100 parts by weight based on 100 parts by weight of the ink absorbing resin.

When the content of the surfactant is 10 parts by weight or less, there is no effect in improving the transportability, and when the content of the surfactant is 100 parts by weight or more, the ink absorption at the time of printing is inhibited, Significantly degrades image quality.

When the surfactant is to be applied to the front or back surface of the medium, water or a 0.01% to 1% solution of isopropyl alcohol, ethyl alcohol or the like is used, and the coating amount is 0.3 mg / mm ^{2 to} 100 mg / It applied so as to mm ^2.

The ink jet recording medium of the present invention can be produced by a conventional method. For example, it can be produced by dispersing an interlayer compound and a binder in a solvent to prepare a dispersion, applying the dispersion on a substrate, and drying. When a surfactant is contained in the dye fixing layer, the surfactant is added to the binder during the preparation of the dispersion.

When an ink-absorbing layer is required, it can be prepared by applying an ink-absorbing resin on the dye fixing layer and drying. When a surfactant is contained, it is added to the ink absorbing resin before coating.

When the surfactant is applied to the front or back surface of the recording medium, the surfactant is applied as a 0.01 to 1% solution of water or isopropyl alcohol or ethanol, and dried.

The recording medium for an ink jet printer of the present invention can be used in the same manner as a recording medium for a conventional ink jet printer.

[0061]

EXAMPLES Examples of the present invention will be described below based on specific experimental results.

First, examples and comparative examples using montmorillonite as an interlayer compound will be described.

Example 1 First, 20 g of a binder, 10 g of an interlayer compound, and a surfactant were added to 80 g of a solvent, and the mixture was treated with a bead mill for 8 hours to obtain a dispersion.

The amount of the surfactant to be added depends on the amount of the intercalation compound 100
10 parts by weight with respect to parts by weight.

Here, a mixed solvent of 8 g of isopropyl alcohol and 72 g of water was used as the solvent. As a binder, Superflex E-2000 manufactured by Daiichi Kogyo Seiyaku Co., Ltd. was used as a polyurethane emulsion. For the intercalation compound, 10 mg of hydrotalcite and 10 mg of malic acid
The thing which carried out adsorption processing of the equivalent was used. As an anionic surfactant, TB-160 manufactured by Matsumoto Yushi Co., Ltd. was used as an anionic surfactant.

Next, the above dispersion was applied onto a polyester film so as to have a dry coating thickness of 8 μm.

Here, a 100 μm-thick D-535 manufactured by ICI, which had been subjected to an easy adhesion treatment, was applied to the polyester film.
Was used.

Thereafter, the dispersion applied on the substrate is
By drying at a temperature of 2 ° C. for 2 minutes, a dye fixing layer was formed to prepare a recording medium for an ink jet printer.

<Example 2> A recording medium for an ink jet printer was produced in the same manner as in Example 1 except that the amount of the surfactant was changed to 100 parts by weight with respect to 100 parts by weight of the interlayer compound.

Example 3 First, 20 g of a binder and 10 g of an interlayer compound were added to 80 g of a solvent, and the mixture was treated with a bead mill for 8 hours to obtain a dispersion.

Here, a mixed solvent of 8 g of isopropyl alcohol and 72 g of water was used as the solvent. As a binder, Superflex E-2000 manufactured by Daiichi Kogyo Seiyaku Co., Ltd. was used as a polyurethane emulsion. For the intercalation compound, 10 mg of hydrotalcite and 10 mg of malic acid
The thing which carried out adsorption processing of the equivalent was used.

Next, the above dispersion was applied onto a polyester film so as to have a dry coating thickness of 8 μm.
After drying for a minute, a dye fixing layer was formed.

Here, a 100 μm-thick D-535 manufactured by ICI, which had been subjected to an easy adhesion treatment, was applied to the polyester film.
Was used.

Next, a paint containing an ink-absorbing resin and a surfactant was applied on the dye fixing layer to a dry coating thickness of 0.1 μm.
It was applied to a thickness of 8 μm.

Here, E-290 manufactured by Miyagi Chemical Industry Co., Ltd. was used as a gelatin resin as the ink absorbing resin.
As a surfactant, Arcard T-50 manufactured by Lion Corporation was used as a cationic surfactant.

The content of the surfactant was 10 parts by weight based on 100 parts by weight of the ink absorbing resin.

Thereafter, the coating material applied on the dye fixing layer was dried at 90 ° C. for 1 minute to form an ink absorbing layer to prepare a recording medium for an ink jet printer.

Example 4 A recording medium for an ink jet printer was produced in the same manner as in Example 3 except that the content of the surfactant was changed to 100 parts by weight with respect to 100 parts by weight of the ink absorbing resin. .

Example 5 First, 20 g of a binder and 10 g of an interlayer compound were added to 80 g of a solvent, and the mixture was treated with a bead mill for 8 hours to obtain a dispersion.

Here, a mixed solvent of 8 g of isopropyl alcohol and 72 g of water was used as the solvent. As a binder, Superflex E-2000 manufactured by Daiichi Kogyo Seiyaku Co., Ltd. was used as a polyurethane emulsion. For the intercalation compound, 10 mg of hydrotalcite and 10 mg of malic acid
The thing which carried out adsorption processing of the equivalent was used.

Next, the above dispersion was applied on a polyester film so as to have a dry coating thickness of 8 μm.
After drying for a minute, a dye fixing layer was formed.

Here, a 100 μm-thick D-535 manufactured by ICI, which had been subjected to an easy adhesion treatment, was applied to the polyester film.
Was used.

Thereafter, a 1% isopropyl alcohol solution of a surfactant was applied onto the dye fixing layer at a coating amount of 0.5%.
A recording medium for an ink jet printer was prepared by applying and drying to a concentration of mg / mm ² .

Here, as a surfactant, an electrostripper QN manufactured by Kao Corporation was used as a cationic surfactant.

Example 6 First, 20 g of a binder and 10 g of an interlayer compound were added to 80 g of a solvent, and the mixture was treated with a bead mill for 8 hours to obtain a dispersion.

Here, as the solvent, a mixed solvent of 8 g of isopropyl alcohol and 72 g of water was used. As a binder, Superflex E-2000 manufactured by Daiichi Kogyo Seiyaku Co., Ltd. was used as a polyurethane emulsion. For the intercalation compound, 10 mg of hydrotalcite and 10 mg of malic acid
The thing which carried out adsorption processing of the equivalent was used.

Next, the above dispersion was applied on a polyester film so as to have a dry coating thickness of 8 μm.
After drying for a minute, a dye fixing layer was formed.

Here, a 100 μm-thick D-535 manufactured by ICI, which had been subjected to an easy adhesion treatment, was applied to the polyester film.
Was used.

After that, the surface of the polyester film opposite to the surface on which the dye fixing layer was formed was coated with a surfactant.
A recording medium for an inkjet printer was prepared by applying and drying a 5% aqueous solution so that the application amount was 0.5 mg / mm ² .

Here, as a surfactant, TB123 manufactured by Matsumoto Yushi Co., Ltd. was used as a nonionic surfactant.

<Comparative Example 1> First, 20 g of a binder and 10 g of an interlayer compound were added to 80 g of a solvent, followed by treatment with a bead mill for 8 hours to obtain a dispersion.

Here, a mixed solvent of 8 g of isopropyl alcohol and 72 g of water was used as the solvent. As a binder, Superflex E-2000 manufactured by Daiichi Kogyo Seiyaku Co., Ltd. was used as a polyurethane emulsion. For the intercalation compound, 10 mg of hydrotalcite and 10 mg of malic acid
The thing which carried out adsorption processing of the equivalent was used.

Next, the above dispersion was applied onto a polyester film so as to have a dry coating thickness of 8 μm.

Here, a 100 μm-thick D-535 manufactured by ICI Co., which was subjected to an easy adhesion treatment, was applied to the polyester film.
Was used.

Thereafter, the dispersion applied on the substrate is
The dye fixing layer was formed by drying at 2 ° C. for 2 minutes to prepare a recording medium for an ink jet printer.

<Comparative Example 2> First, 20 g of a binder, 10 g of an interlayer compound, and a surfactant were added to 80 g of a solvent, and the mixture was treated with a bead mill for 8 hours to obtain a dispersion.

The amount of the surfactant added is 100
5 parts by weight to 5 parts by weight.

Here, a mixed solvent of 8 g of isopropyl alcohol and 72 g of water was used as the solvent. As a binder, Superflex E-2000 manufactured by Daiichi Kogyo Seiyaku Co., Ltd. was used as a polyurethane emulsion. For the intercalation compound, 10 mg of hydrotalcite and 10 mg of malic acid
The thing which carried out adsorption processing of the equivalent was used. As an anionic surfactant, TB-160 manufactured by Matsumoto Yushi Co., Ltd. was used as an anionic surfactant.

Next, the above dispersion was applied onto a polyester film so as to have a dry coating thickness of 8 μm.

Here, a polyester film having a thickness of 100 μm and a D-535 manufactured by ICI Co., Ltd.
Was used.

Thereafter, the dispersion applied on the substrate was
By drying at 2 ° C. for 2 minutes, a dye fixing layer was formed to obtain a recording medium for an ink jet printer.

Comparative Example 3 A recording medium for an ink jet printer was prepared in the same manner as in Comparative Example 2, except that the amount of the surfactant was changed to 120 parts by weight with respect to 100 parts by weight of the interlayer compound.

<Comparative Example 4> First, 20 g of a binder and 10 g of an interlayer compound were added to 80 g of a solvent, followed by treatment with a bead mill for 8 hours to obtain a dispersion.

Here, a mixed solvent of 8 g of isopropyl alcohol and 72 g of water was used as the solvent. As a binder, Superflex E-2000 manufactured by Daiichi Kogyo Seiyaku Co., Ltd. was used as a polyurethane emulsion. For the intercalation compound, 10 mg of hydrotalcite and 10 mg of malic acid
The thing which carried out adsorption processing of the equivalent was used.

Next, the above dispersion was applied onto a polyester film so as to have a dry coating thickness of 8 μm.
After drying for a minute, a dye fixing layer was formed.

Here, a 100 μm-thick D-535 manufactured by ICI, which had been subjected to an easy adhesion treatment, was applied to the polyester film.
Was used.

Next, a coating containing an ink-absorbing resin and a surfactant was applied on the dye fixing layer in a dry coating thickness of 0.1 to 0.1 μm.
It was applied to a thickness of 8 μm.

Here, E-290 manufactured by Miyagi Chemical Industry Co., Ltd. was used as a gelatin resin as the ink absorbing resin.
As a surfactant, Arcard T-50 manufactured by Lion Corporation was used as a cationic surfactant.

The content of the surfactant was 5 parts by weight with respect to 100 parts by weight of the resin made by ink absorption.

Thereafter, the coating material applied on the dye fixing layer was dried at 90 ° C. for 1 minute to form an ink absorbing layer to prepare a recording medium for an ink jet printer.

Comparative Example 5 A recording medium for an ink jet printer was produced in the same manner as in Comparative Example 4, except that the content of the surfactant was changed to 110 parts by weight with respect to 100 parts by weight of the ink absorbing resin. .

Next, Examples and Comparative Examples using montmorillonite as an interlayer compound will be described.

Example 7 First, 20 g of a binder, 10 g of an interlayer compound, and a surfactant were added to 80 g of a solvent, and the mixture was treated with a bead mill for 8 hours to obtain a dispersion.

The amount of the surfactant to be added is 100
10 parts by weight with respect to parts by weight.

Here, a mixed solvent of 8 g of isopropyl alcohol and 72 g of water was used as the solvent. As a binder, Superflex E-2000 manufactured by Daiichi Kogyo Seiyaku Co., Ltd. was used as a polyurethane emulsion. As the intercalation compound, one obtained by subjecting 10 g of montmorillonite to an adsorption treatment of 10 mg equivalent of phthalic acid was used. As an anionic surfactant, TB-160 manufactured by Matsumoto Yushi Co., Ltd. was used as an anionic surfactant.

Next, the above dispersion was applied onto a polyester film so as to have a dry coating thickness of 8 μm.

The polyester film was subjected to an easy-adhesion treatment and having a thickness of 100 μm, manufactured by ICI D-535.
Was used.

Thereafter, the dispersion applied on the substrate was
By drying at 2 ° C. for 2 minutes, a dye fixing layer was formed to obtain a recording medium for an ink jet printer.

Example 8 A recording medium for an ink jet printer was produced in the same manner as in Example 7, except that the amount of the surfactant was changed to 100 parts by weight with respect to 100 parts by weight of the interlayer compound.

Example 9 First, 20 g of a binder and 10 g of an interlayer compound were added to 80 g of a solvent, and the mixture was treated with a bead mill for 8 hours to obtain a dispersion.

Here, a mixed solvent of 8 g of isopropyl alcohol and 72 g of water was used as the solvent. As a binder, Superflex E-2000 manufactured by Daiichi Kogyo Seiyaku Co., Ltd. was used as a polyurethane emulsion. As the intercalation compound, one obtained by subjecting 10 g of montmorillonite to an adsorption treatment of 10 mg equivalent of phthalic acid was used.

Next, the above dispersion was applied on a polyester film so as to have a dry coating thickness of 8 μm.
After drying for a minute, a dye fixing layer was formed.

Here, a 100 μm-thick D-535 manufactured by ICI Co., which was subjected to an easy adhesion treatment, was applied to the polyester film.
Was used.

Next, a coating containing an ink-absorbing resin and a surfactant was applied on the dye-fixing layer with a dry coating thickness of 0.1 μm.
It was applied to a thickness of 8 μm.

Here, E-290 manufactured by Miyagi Chemical Industry Co., Ltd. was used as a gelatin resin as the ink absorbing resin.
As a surfactant, Arcard T-50 manufactured by Lion Corporation was used as a cationic surfactant.

The content of the surfactant was 10 parts by weight with respect to 100 parts by weight of the ink-absorbing resin.

Thereafter, the coating material applied on the dye fixing layer was dried at 90 ° C. for 1 minute to form an ink absorbing layer to prepare a recording medium for an ink jet printer.

Example 10 A recording medium for an ink jet printer was prepared in the same manner as in Example 9, except that the content of the surfactant was changed to 100 parts by weight with respect to 100 parts by weight of the ink absorbing resin. .

<Comparative Example 6> First, 20 g of a binder, 10 g of an interlayer compound, and a surfactant were added to 80 g of a solvent, and the mixture was treated with a bead mill for 8 hours to obtain a dispersion.

The amount of the surfactant to be added depends on the amount of the intercalation compound 100
5 parts by weight to 5 parts by weight.

Here, as the solvent, a mixed solvent of 8 g of isopropyl alcohol and 72 g of water was used. As a binder, Superflex E-2000 manufactured by Daiichi Kogyo Seiyaku Co., Ltd. was used as a polyurethane emulsion. As the intercalation compound, one obtained by subjecting 10 g of montmorillonite to an adsorption treatment of 10 mg equivalent of phthalic acid was used. As an anionic surfactant, TB-160 manufactured by Matsumoto Yushi Co., Ltd. was used as an anionic surfactant.

Next, the dispersion was applied onto a polyester film so as to have a dry coating thickness of 8 μm.

[0133] Here, a polyester film having a thickness of 100 µm and a D-535 manufactured by ICI Co., Ltd.
Was used.

Thereafter, the dispersion applied on the substrate was
By drying at 2 ° C. for 2 minutes, a dye fixing layer was formed to obtain a recording medium for an ink jet printer.

Comparative Example 7 A recording medium for an ink jet printer was prepared in the same manner as in Comparative Example 6, except that the amount of the surfactant was changed to 120 parts by weight with respect to 100 parts by weight of the interlayer compound.

<Comparative Example 8> First, 20 g of a binder and 10 g of an interlayer compound were added to 80 g of a solvent, and the mixture was treated with a bead mill for 8 hours to obtain a dispersion.

Here, a mixed solvent of 8 g of isopropyl alcohol and 72 g of water was used as the solvent. As a binder, Superflex E-2000 manufactured by Daiichi Kogyo Seiyaku Co., Ltd. was used as a polyurethane emulsion. As the intercalation compound, one obtained by subjecting 10 g of montmorillonite to an adsorption treatment of 10 mg equivalent of phthalic acid was used.

Next, the above dispersion was applied onto a polyester film so as to have a dry coating thickness of 8 μm.
After drying for a minute, a dye fixing layer was formed.

[0139] Here, a polyester film having a thickness of 100 µm and a D-535 manufactured by ICI Co.,
Was used.

Next, a coating material containing an ink-absorbing resin and a surfactant was applied on the dye fixing layer in a dry coating thickness of 0.1.
It was applied to a thickness of 8 μm.

Here, E-290 manufactured by Miyagi Chemical Industry Co., Ltd. was used as a gelatin resin as the ink absorbing resin.
As a surfactant, Arcard T-50 manufactured by Lion Corporation was used as a cationic surfactant.

The content of the surfactant was 5 parts by weight with respect to 100 parts by weight of the resin made by ink absorption.

Thereafter, the coating material applied on the dye fixing layer was dried at 90 ° C. for 1 minute to form an ink absorbing layer, thereby producing a recording medium for an ink jet printer.

Comparative Example 9 A recording medium for an ink jet printer was produced in the same manner as in Comparative Example 8, except that the content of the surfactant was changed to 110 parts by weight with respect to 100 parts by weight of the ink absorbing resin. .

Evaluation of Characteristics A test pattern image was formed on the recording medium for an ink-jet printer produced as described above using an ink-jet printer, and the transportability and the ink absorbency were evaluated.

As the ink jet printer, HP850C manufactured by Hewlett-Packard Company was used.

The transportability test was conducted at a temperature of 15 ° C. and a relative humidity of 25.
%. Twenty recording media were stacked and set on a paper feed tray of an ink jet printer, and the transportability during continuous printing was visually observed and evaluated.

In the evaluation of the transportability, a case where continuous printing of 20 sheets was possible was evaluated as ○, and a double feed occurred during the printing.
The case where continuous printing of sheets was impossible was evaluated as x.

The ink absorbency was evaluated by visually observing whether or not the ink permeated the ink receiving layer and was absorbed during image formation.

Here, when the recording medium has no ink absorbing layer, the dye fixing layer corresponds to the ink receiving layer.
When the recording medium has an ink absorbing layer, the dye fixing layer and the ink absorbing layer correspond to this.

The ink absorptivity was evaluated as ○ when the ink penetrated into the ink receiving layer and absorbed, and as × when the ink did not penetrate into the ink receiving layer and was not absorbed.

Table 1 shows the characteristic evaluation results of the recording media for an ink jet printer of Examples 1 to 6 and Comparative Examples 1 to 5 using hydrotalcite as an interlayer compound.
Shown in

In Tables 1 and 2, the content of the intercalation compound 10 was measured when the surfactant was contained in the dye fixing layer.
The content of the surfactant relative to 0 parts by weight is shown. When the surfactant is contained in the ink absorbing layer, the content of the surfactant is shown based on 100 parts by weight of the ink absorbing resin.

[0154]

[Table 1]

As is clear from Table 1, the recording medium for an ink jet printer in which a surfactant was contained in the dye fixing layer or the ink absorbing layer was excellent in transportability and ink absorption. The same effect was obtained when the surfactant was applied to the front or back surface of the medium.

However, when the surfactant was not contained in the dye-fixing layer or the ink-absorbing layer, or when the surfactant was contained, the content was small, and sufficient transportability could not be obtained.
When the content of the surfactant in the dye fixing layer or the ink-absorbing layer was large, good transportability was obtained, but the ink-absorbing property was reduced.

Therefore, the content of the surfactant is from 10 parts by weight to 100 parts by weight of the interlayer compound in the dye fixing layer.
It has been found that by setting 100 parts by weight or 10 parts by weight to 100 parts by weight with respect to 100 parts by weight of the ink absorbing resin of the ink absorbing layer, it is possible to achieve both excellent transportability and ink absorption. .

Next, Table 2 shows the characteristic evaluation results of the recording media for ink jet printers of Examples 7 to 10 and Comparative Examples 6 to 9 using montmorillonite as the interlayer compound.

[0159]

[Table 2]

Similarly, when montmorillonite is used as the interlayer compound, the dye fixing layer contains 10 to 100 parts by weight of a surfactant based on 100 parts by weight of the interlayer compound, or the ink absorbing layer contains Ink absorbent resin 100
It has been found that by incorporating 10 to 100 parts by weight of the surfactant with respect to parts by weight, both excellent transportability and ink absorption can be achieved.

[0161]

As is apparent from the above description, the recording medium for an ink jet printer of the present invention prevents sticking between recording media due to static electricity by including a surfactant in the dye fixing layer or the ink absorbing layer. However, good transportability can be realized.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration example of a recording medium for an inkjet printer according to the present invention.

FIG. 2 is a cross-sectional view illustrating a configuration example of a recording medium for an inkjet printer of the present invention.

[Explanation of symbols]

1,11 base material, 2,12 dye fixing layer, 13 ink absorption layer

Claims (12)

[Claims] 1. A dye fixing layer, comprising: a base material; and a dye fixing layer formed on the base material and containing a binder and an interlayer compound that receives and retains a water-soluble dye by an intercalation reaction. Is 1 to 100 parts by weight of the binder.
A recording medium for an ink jet printer, comprising 0 to 100 parts by weight of a surfactant. 2. A recording medium for an ink jet printer according to claim 1, wherein said interlayer compound is a layered inorganic polymer having exchangeable cations. 3. The recording medium for an ink jet printer according to claim 2, wherein said layered inorganic polymer is a montmorillonite group mineral. 4. The recording medium for an ink jet printer according to claim 1, wherein said interlayer compound is a layered inorganic polymer having exchangeable anions. 5. The recording medium for an ink jet printer according to claim 4, wherein said layered inorganic polymer is a hydrotalcite group mineral. 6. A base material, a dye fixing layer formed on the base material, the dye fixing layer containing an interlayer compound that receives and retains a water-soluble dye by an intercalation reaction, and a binder, and formed on the dye fixing layer. And an ink absorbing layer containing an ink absorbing resin, wherein the ink absorbing layer contains 10 to 100 parts by weight of a surfactant based on 100 parts by weight of the ink absorbing resin. Characteristic recording media for ink jet printers. 7. The recording medium according to claim 6, wherein the interlayer compound is a layered inorganic polymer having exchangeable cations. 8. The recording medium for an ink jet printer according to claim 7, wherein the layered inorganic polymer is a montmorillonite group mineral. 9. The recording medium according to claim 6, wherein the interlayer compound is a layered inorganic polymer having exchangeable anions. 10. The recording medium for an ink jet printer according to claim 9, wherein said layered inorganic polymer is a hydrotalcite group mineral. 11. A recording medium for an ink jet printer comprising: a substrate; and a dye fixing layer formed on the substrate and containing a binder and an interlayer compound that receives and retains a water-soluble dye by an intercalation reaction. A recording medium for an ink jet printer, wherein a surfactant is applied to the surface of the surface on which the dye fixing layer is formed. 12. A substrate comprising: a substrate; and a dye fixing layer formed on one surface of the substrate and containing an interlayer compound that accepts and retains a water-soluble dye by an intercalation reaction and a binder. A recording medium for an ink jet printer, wherein a surfactant is applied to the other surface of the substrate.