JP2000211244A - Manufacture of ink jet recording material, and ink jet recording material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing an ink jet recording material being excellent in printability and water resistance and also having surface luster. SOLUTION: In a manufacturing method of an ink jet recording material wherein at least one ink receiving layer 12 is provided on a substrate 11 and the ink receiving layer 12 is photo-cured, a layer of a composition of photosensitive resin and an inorganic filler is provided as the ink receiving layer 12. Before photo-curing is conducted, a smooth film sheet 13 is press-bonded on the ink application surface side of the ink receiving layer 12 and the sheet 13 is peeled off after the photo-curing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an ink jet recording material and an ink jet recording material manufactured using the method for manufacturing an ink jet recording material.

[0002]

2. Description of the Related Art Various recording systems such as a wire dot recording system, a heat-sensitive melt transfer recording system, a heat-sensitive sublimation transfer recording system, an electrophotographic recording system, and an ink jet recording system have been developed as output prints of a computer or a word processor. Among them, the ink jet recording method has features such as low printing cost, a compact apparatus, no noise, and high-speed recording.
For this reason, it has been drawing attention as a printer that quickly and accurately outputs image information such as characters and figures created by a computer or the like. In addition, the inkjet recording method is easy to colorize and the picture pattern is clear, so image information created by computer can be printed out without deterioration of image quality, and it can be used not only for office and personal use but also for outdoor exhibitions It has been receiving attention in recent years.

[0003] In particular, for the purpose of outdoor exhibition, the recording material for ink-jet recording needs not only the sharpness and color development of the printing but also the rapid absorption and drying of the water-based ink at the time of printing. Is required, and the ink is required to have fixability and water resistance so that the printed surface is not destroyed by rainwater or the like. Further, there is a demand for an inkjet recording material having a glossy surface in order to improve the appearance.

Therefore, in response to such a demand,
As an ink jet recording material capable of clearly printing an image, a material having an ink receiving layer containing a water-soluble resin and an inorganic filler formed on a substrate has been proposed. However, if the hydrophilicity of the ink receiving layer is increased by using a water-soluble resin in order to improve the image quality and the drying property of the ink, the water resistance is impaired, and in order to maintain the water resistance, the water-soluble resin is used. When the crosslinking of the ink is increased, the drying property of the ink is reduced.

[0005] Printability can be improved by using a resin having excellent water resistance and adding an inorganic filler, but in this case, the surface of the ink receiving layer can be improved by adding the inorganic filler. There is a problem that the surface of the recording material for ink jet recording loses its luster because the surface is not smooth.

Therefore, as a method for producing an ink jet recording material having a gloss on the surface of the ink receiving layer, an ink receiving layer is formed using a resin containing a solvent, dried, and then a film sheet having an adhesive layer is formed. There has been proposed a method of transferring an image by using a recording medium to produce an inkjet recording material having a surface gloss. However, this method has a problem that the number of steps is increased due to the necessity of a step of removing the solvent, and that the film sheet needs to have adhesiveness to the ink receiving layer.

As described above, the conventional ink jet recording material satisfies the printing aptitude and water resistance, such as clearness and color development of printing, absorption and drying of ink during printing, and ink fixability, and , Those with surface gloss have not been obtained,
In particular, it has been difficult to satisfy the above requirements when using an aqueous pigment ink.

[0008]

SUMMARY OF THE INVENTION In view of the above situation, the present invention provides a method for producing an ink jet recording material having excellent printability and water resistance and having a surface gloss, and an ink jet recording material produced by the above method. It is intended to provide a recording material.

[0009]

SUMMARY OF THE INVENTION The present invention provides a method for producing an ink-jet recording material in which at least one ink-receiving layer is provided on a substrate and the ink-receiving layer is photo-cured. As a layer of a composition comprising a photosensitive resin and an inorganic filler is provided, and before performing the photocuring, a smooth film sheet is pressed against the ink-coated surface side of the ink receiving layer, and the photocuring is performed. And then peeling off the film sheet. Hereinafter, the present invention will be described in detail.

The method of manufacturing a recording material for ink jet recording of the present invention will be described with reference to FIG. FIG.
(A)-(b) is sectional drawing which shows typically the manufacturing method of the recording material for inkjets of this invention. In the manufacturing method of the present invention, as shown in FIG. 1A, first, at least one ink receiving layer 12 is provided on a base material 11, and a smooth film sheet 13 is formed on the ink receiving surface side of the ink receiving layer 12. Crimp. Thereafter, the ink receiving layer 11 is light-cured. Further, after the ink receiving layer 12 is light-cured, FIG.
By peeling the film sheet 13 from the ink receiving layer 12 as shown in (b), the ink receiving layer 12 having the glossy surface 12a is formed.

The material of the substrate 11 used in the present invention is not particularly limited. For example, polyethylene terephthalate resin, polycarbonate resin, acrylic resin, polyvinyl chloride resin, polypropylene resin, polystyrene resin, polyvinyl alcohol resin, polyethylene resin, Examples include an acetate resin, a triacetate resin, and a polyimide resin.

The shape of the substrate 11 is preferably a film or plate. The thickness of the substrate 11 is 5 to
250 μm is preferable, and 50 to 180 μm is more preferable. If the thickness of the base material sheet 11 is less than 5 μm, the handleability may be poor, and if it exceeds 250 μm, the production cost may be increased, which may be economically disadvantageous. Base material 11
On the surface of the surface on which the ink receiving layer is provided, the adhesive force between the base material 11 and the ink receiving layer 12 can be strengthened.
It is preferable to perform a primer treatment or a corona treatment.

The primer used in the above-mentioned primer treatment is not particularly restricted but includes, for example, alkyd resin, polyester resin, polyvinyl acetate resin, polyvinyl chloride copolymer resin, NBR resin, SBR resin, polyurethane resin, acrylic resin and polyamide. Examples thereof include resins, mixtures and modified products thereof. The above-mentioned modified product is obtained by, for example, copolymerizing or grafting a hydroxyl group, a carboxylic acid, a quaternary ammonium salt-containing monomer, or the like, thereby improving the adhesiveness, hydrophilicity, and the like.

When the substrate 11 has a surface on which the ink receiving layer 12 is not provided, an anti-curl layer or an antistatic layer may be provided on the surface. Examples of the material of the curl prevention layer include the same water-soluble resin as the water-soluble resin that can be used for the ink receiving layer described later, an acrylic resin, a modified acrylic resin, a polyester resin, and the like. Among these, acrylic resins, modified acrylic resins and polyester resins are preferred from the viewpoint that excellent blocking resistance and slip properties can be imparted. When a layer similar to the ink receiving layer is provided as the above-described curl preventing layer, not only the curl preventing effect is obtained, but also the remarkable effect of reducing the haze of the entire ink jet recording material is obtained.

In the manufacturing method of the present invention, first, a layer of a composition comprising a photosensitive resin and an inorganic filler is provided as an ink receiving layer 12 on a substrate 11. As a method for providing the ink receiving layer 12, a conventionally known method can be used,
For example, gravure coat, gravure reverse coat, roll coat, wire bar coat, blade coat, knife coat, air knife coat, comma coat, slot die coat, dip coat and the like can be mentioned. When an ink receiving layer is provided by using such a method, an ink receiving layer having the same composition may be formed multiple times, or an ink receiving layer having a different composition may be formed multiple times. You may.

Examples of the photosensitive resin include KJP-960B manufactured by Nippon Kayaku Co., Ltd.

As the inorganic filler, for example, porous particles can be used. Specifically, for example, silica, clay, talc, diatomaceous earth, calcium carbonate, calcium sulfate, barium sulfate, aluminum silicate, synthetic zeolite, smectite, montmorillonite group minerals,
Examples include synthetic mica, alumina, titanium oxide, and zinc oxide.

The amount of the inorganic filler is not particularly limited, but may be 1 to 100 parts by weight of the photosensitive resin.
0 to 150 parts by weight is preferred. If the amount of the inorganic filler is less than 10 parts by weight, a sufficient effect on the ink absorbency and drying property may not be obtained. If the amount is more than 150 parts by weight, the filler holding power of the ink receiving layer becomes insufficient. In some cases, the ink receiving layer cannot maintain a film shape.

The ink receiving layer 12 preferably uses a composition containing a water-soluble resin, an organic filler, and other additives in addition to the photosensitive resin and the inorganic filler.
The water-soluble resin is not particularly limited as long as it is soluble in water or a mixed solvent of water and alcohol.
Polyvinyl alcohol, polyvinyl pyrrolidone, poly (meth) acrylic acid, carboxymethyl cellulose (C
MC), cellulosic resins such as hydroxyethylcellulose (HEC) and hydroxypropylcellulose (HPC), polyacrylamide, polyethylene oxide,
Examples include polyethylene glycol, polyvinyl acetal resin, polyvinyl methyl ether, polyamine, polyethylene imine, casein, gelatin, starch, copolymers thereof, and cation / anion modified products.
These water-soluble resins may be used alone or in combination of two or more.

The amount of the water-soluble resin is not particularly limited, but is preferably 1 to 100 parts by weight of the photosensitive resin.
~ 50 parts by weight are preferred. The amount of the water-soluble resin is 1
If it is less than 50 parts by weight, sufficient effects on the ink absorption and drying properties may not be obtained. If it exceeds 50 parts by weight, the water resistance of the ink receiving layer may be impaired and eluted.

The organic filler is not particularly limited.
For example, the above water-soluble resin is made water-absorbing and / or water-insoluble by crosslinking; water-absorbing alkyd resin, polyester resin, polyvinyl acetate resin, vinyl chloride vinyl acetate copolymer resin, NBR resin, SBR resin, polyurethane resin, Copolymers of hydrophilic and hydrophobic monomers such as acrylic resins, polyamides, mixtures and modified products thereof; polyvinyl alcohol, polyacrylate, polymethacrylate, polystyrene, benzoguanamine / formaldehyde condensate, benzoguanamine / melamine/
Examples include formaldehyde condensates, melamine / formaldehyde condensates, polyamide resins, various celluloses, starches, and those obtained by crosslinking these.

The amount of the organic filler is not particularly limited, but may be 1 to 100 parts by weight of the photosensitive resin.
-30 parts by weight are preferred. The amount of the organic filler is 1
If the amount is less than 30 parts by weight, a sufficient effect on the ink absorption and drying properties may not be obtained. If the amount exceeds 30 parts by weight, the absorption and drying properties of the ink may be deteriorated or bleeding may occur. is there.

Other additives include, for example, surfactants, emulsifiers, antioxidants, defoamers, leveling agents, antioxidants and the like. When a surfactant or an emulsifier is used as another additive, the dispersion stability of the inorganic filler or the like in the photosensitive resin can be improved. The amount of the other additives is not particularly limited, and may be appropriately determined in consideration of the characteristics of the photosensitive resin and the inorganic filler to be mixed, the physical properties desired for the ink receiving layer, and the like.

Specific examples of the composition constituting the ink receiving layer include, for example, N-methoxymethylacrylamide (manufactured by Nitto Riken Kogyo) and methacryloyloxyethyltrimethylammonium methyl sulfite (manufactured by Nitto Riken Kogyo). As a main component, Irg-184 as a photoinitiator, modified polyvinyl acetate (manufactured by Nippon Synthetic Chemical Company,
(Gohselan L301) and titanium oxide (manufactured by Ishihara Sangyo Co., Ltd.) as additives.

The thickness of the ink receiving layer 12 is not particularly limited, but is preferably 0.1 to 50 μm, and 3 to 30 μm.
m is more preferred. The thickness of the ink receiving layer 12 is 0.1 μm.
If less than m, the ink may not be sufficiently absorbed,
If it exceeds 50 μm, the production cost becomes high, which may be economically disadvantageous.

Since the film sheet 13 is peeled off from the ink receiving layer 12 after photocuring, it is preferable that the film sheet 13 has a lower adhesiveness to the ink receiving layer 12 and a higher peeling property than the substrate 11. As the material of the film sheet 11,
For example, polyethylene terephthalate resin, polycarbonate resin, acrylic resin, polyvinyl chloride resin, polypropylene resin, polystyrene resin, polyvinyl alcohol resin, polyethylene resin, diacetate resin, triacetate resin, polyimide resin and the like can be mentioned.

The shape of the film sheet 11 is preferably a film or a plate. Film sheet 11
Is preferably 5 to 250 μm, and 50 to 1 μm.
80 μm is more preferred. In addition, in order to improve the releasability of the film sheet 11, a material obtained by treating the surface of the film sheet with silicon, fluorine, or the like may be used.

As a method for pressing the film sheet to the ink receiving layer, for example, a method using a roll press or the like can be mentioned. Thus, by pressing the film sheet 11 on the ink-coated surface side of the ink-receiving layer 12, the glossy surface 12a
Can be provided.

As described above, according to the method for producing an ink jet recording material of the present invention, the process of forming (transferring) a glossy surface and the process of curing can be performed simultaneously, and the film sheet has an adhesive layer. There is no need to be. Therefore, it is possible to manufacture an ink jet recording material having excellent gloss, excellent printability and water resistance, and a surface gloss with a small number of steps.

An ink jet recording material manufactured by the above-described method for manufacturing an ink jet recording material is also one aspect of the present invention. The ink that can be used for the recording material for inkjet is not particularly limited, and any dye-based ink or pigment-based ink can be suitably used.

[0031]

EXAMPLES The present invention will be described in detail below with reference to examples of the present invention, but the present invention is not limited to these examples.

Example 1 A 100 μm-thick transparent polyethylene terephthalate film (Lumirror Q80 manufactured by Toray Industries, Inc.) was used as a base sheet.
Using D), one surface was subjected to corona treatment. Next, an ink receiving layer having the following composition was applied to the upper layer of the surface subjected to the corona treatment by a bar coating method so that the film thickness when dried was 30 to 50 μm.

[0033]Composition of ink receiving layer  Photosensitive resin KJP-960B (manufactured by Nippon Kayaku) 100 parts by weight Calcium carbonate Wilcal A (manufactured by Maruo Calcium) 30 parts by weight Silica sol MEK-ST (manufactured by Nissan Chemical Industries) 5 parts by weight

Thereafter, a polyethylene terephthalate film similar to the base sheet was pressed onto the upper layer of the ink receiving layer as a transfer film sheet having a smooth surface before light curing. Further, using an eye grandage ECS-301 type UV irradiation device manufactured by Eye Graphics Co., Ltd., 500
The ink receiving layer is irradiated with UV light under the condition of mJ / m ² , the ink receiving layer is photo-cured, and then the transfer film sheet is peeled off to form an ink jet recording material having an ink receiving layer having a surface gloss. I got

The obtained ink-jet recording material is
Evaluation of lint suitability, surface gloss, and water resistance
The evaluation was performed using the method.Evaluation method  (1) Suitable for printing Inkjet printer (Mimaki Engineering Co., Ltd.)
Test pattern printed using JV-1300)
And evaluated according to the following evaluation criteria.Evaluation criteria  ○ The shape of the ink dot is a perfect circle and the ink 2
Ink of the color over-applied part adheres to the finger 20 minutes after printing
Dried to the extent not to. × The shape of the ink dot is not a perfect circle and / or
Ink for 20 minutes after printing
It does not dry and adheres to the finger.The shape of the ink dots should be observed using a microscope.
Was.

(2) Surface Gloss Using a gloss meter VGS-LD manufactured by Nippon Denshoku Industries Co., Ltd.
And the reflectance of the reflected light at 60 ° was measured. (3) Water resistant material for inkjet recording with test pattern printed
Was immersed in water at room temperature for 24 hours and evaluated according to the following evaluation criteria.
Valued.Evaluation criteria  ○ The ink receiving layer did not dissolve. × The ink receiving layer was dissolved.

Comparative Example 1 An ink jet recording material was prepared in the same manner as in Example 1 except that the composition of the ink receiving layer was changed only to the photosensitive resin. The obtained recording material for inkjet was evaluated in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 2 Example 1 except that no transfer film sheet was used.
In the same manner as in the above, an inkjet recording material was prepared. The obtained recording material for inkjet was evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0039]

[Table 1]

As shown in Table 1, the recording material for ink jet obtained in Example 1 was excellent in surface gloss, printability and water resistance. The ink jet recording material obtained in Comparative Example 1 was poor in printability, and the ink jet recording material obtained in Comparative Example 2 was poor in surface gloss.

[0041]

As described above, the method for producing a recording material for ink jet recording of the present invention has the above-mentioned structure, so that it is possible to produce a recording material for ink jet recording which is excellent in printability and water resistance and has a surface gloss. Further, since the inkjet recording material of the present invention has the above-described configuration,
It has excellent printability and water resistance, and has surface gloss.

[Brief description of the drawings]

FIGS. 1A and 1B are cross-sectional views schematically showing a method for manufacturing an inkjet recording material of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Recording material for inkjet 11 Substrate 12 Ink receiving layer 12a Glossy surface 13 Transfer film sheet

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hideo Kuroda 3-2-15 Meiwadori, Hyogo-ku, Kobe Bando Chemical Co., Ltd. F-term (reference) 2H086 BA15 BA32 BA35 BA41 4F100 AA00B AH00B AK01B AK42 AR00B AT00A BA02 CA13B CA23B CC00B EH46 EJ082 EJ172 EJ54 EJ542 EJ912 GB90 HB31B JB07 JB09B JD14 JD14B JN17B JN21 4J039 BE01 BE02 GA24

Claims (4)

[Claims] 1. A method for producing an ink-jet recording material, comprising: providing at least one ink-receiving layer on a substrate, and photo-curing the ink-receiving layer, wherein the ink-receiving layer comprises a photosensitive resin and an inorganic filler. A layer of a composition comprising an agent is provided, and before performing the photo-curing, a smooth film sheet is pressed against the ink-coated side of the ink-receiving layer, and after performing the photo-curing, the film sheet is peeled off. A method for producing a recording material for inkjet recording, comprising: 2. The method according to claim 1, wherein the ink receiving layer contains a water-soluble resin and an organic filler. 3. An ink jet recording material produced by using the method for producing an ink jet recording material according to claim 1. 4. The ink-jet recording material according to claim 3, which is applicable to a dye-based ink and a pigment-based ink.