JP2956232B2 - Recording material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording material, and more particularly, to a recording material for an ink jet printer in which a film capable of full-color high-density recording is formed on a flat surface of a non-porous support. Related to recording materials.

[0002]

2. Description of the Related Art Ink jet printers have begun to spread rapidly in recent years because of their excellent features such as clearness of recording, quietness of sound, and easy colorization. Ink jet printers use ink that is difficult to dry to prevent clogging of the jet nozzle, and the components of this ink are water, polyhydric alcohol,
It is generally dissolved in a polyhydric alcohol ether, pyrrolidone, or the like. For this reason, when printing and recording is performed by an ink jet printer, the recording sheet needs to have absorptivity, and paper specially designed to impart the ability to absorb ink is usually used.

[0003] On the other hand, with the colorization of ink jet printers, high resolution and high quality recording image quality are required, and for that purpose, the following performance must be satisfied. 1) Ink absorption is as quick as possible;
2) When the ink dots overlap, the ink that has adhered later is not mixed with the ink that has adhered earlier and the color is not turbid. 3)
The ink dot diameter must not be larger than necessary 4)
That the shape of the ink dot diameter is close to a perfect circle and that the periphery thereof is smooth; 5) the density of the ink dots is high, and the periphery of the dot is not blurred; 6) the ink has excellent coloration properties; 7) have excellent water resistance;

[0004] In order to meet such demands, a number of methods for coating a specific polymer on a plastic film have been proposed. For example, JP-A-57-14091, JP-A-59-11284, JP-A-59-33179, JP-A-60-132785, and JP-A-60-220750
JP-A-61-193879, JP-A-62-215
No. 79. However, with the rapid progress of recent printer technology, the recording density has been increased and the recording speed has been remarkably increased. Is required, but a material satisfying these requirements has not been found yet.

[0005]

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a recording material for ink jet recording which sufficiently satisfies the above-mentioned required characteristics and is particularly excellent in ink absorption, coloring and bleeding properties. To provide. The present invention is an ink receiving layer comprising a filler particle and a resin having hydrophilicity,
The fluorine-based surfactant significantly improves the ink permeability on the surface, improves the ink absorption speed, color development, and bleeding, and records a full-color image using a plurality of color recording liquids in an inkjet recording method. At
That is, excellent recording characteristics can be exhibited.

[0006]

According to the present invention, there is provided a non-porous support comprising a filler particle and a binder resin as main components, and 0.5 to 10% by weight based on the total weight of the coating. The gist of the present invention is a recording material having a film containing a fluorine-based surfactant having the structure (I). Hereinafter, the present invention will be described in detail. As the binder resin used in the present invention, any of conventionally known aqueous emulsion resins, and water-soluble polymers and hydrophilic resins can be used. Specific examples of the aqueous emulsion resin include an ionomer type aqueous urethane resin, an acrylic resin, a styrene butadiene resin, a vinyl acetate resin, and a synthetic resin latex such as a synthetic rubber latex.

Specific examples of the water-soluble polymer include polyvinyl alcohol, polyvinyl acetal, polyvinyl pyrrolidone, sodium alginate, carboxymethyl cellulose, polyacrylamide, sodium polyacrylate, gelatin, starch, casein, gum arabic and the like. As specific examples of the hydrophilic resin, polyvinyl butyral, polyvinyl acetate, polyvinyl chloride, polyacrylonitrile, polyurethane resin, alkyd resin,
Examples include polyester and phenolic resins. These resins may be used alone or in combination of two or more.

Examples of the filler particles include inorganic fine particles such as silica, clay, talc, calcium carbonate, titanium oxide, and zeolite, and organic fine particles such as polystyrene, polyethylene, polyethylene urea, and urea formaldehyde resin. The higher the particle size is, the more preferable it is. As these filler particles, those having a particle size of 0.1 to 10 μm, preferably about 0.3 to 5 μm are used.

In the present invention, the fluorinated surfactant is a fluorinated surfactant having a structure represented by the above general formula (I), and specific examples thereof include the following.

[0010]

Embedded image

[0011]

[Table 1]

These fluorinated surfactants can be produced by a known method, for example, an aminoalkyl ester of acrylic acid obtained by reacting an acrylic acid acrylic ester with a dialkylalkanolamine, and a linear alkylsulfonic acid. A perfluoroalkylsulfonic acid fluoride produced by an electrolytic fluorination reaction of chloride is reacted to obtain an acrylate derivative having a perfluoroalkyl chain, and this is copolymerized with a polyetherester of acrylic acid.

For convenience, these fluorinated surfactants are commercially available, for example, EFTOP EF-802 (trade name, manufactured by Mitsubishi Materials Corporation) or the like, and these can be used. The amount of these fluorine-based surfactants added is 0.5 to the total weight of the recording layer (coating) in a dry state.
10 to 10% by weight, preferably 0.5 to 5% by weight. Various additives such as a dispersant, a surfactant, an antifoaming agent, a lubricant, a pH adjuster, and a preservative can be mixed in the recording layer.

A coating liquid containing a binder resin, filler particles, a fluorine-based surfactant and various additives added as needed is applied on a non-porous support, and a coating as a recording layer is formed. Form. A solvent is used for preparing the coating liquid, and the solvent is mainly water. In addition, solvents such as lower alcohols such as isopropyl alcohol and lower ketones such as methyl ethyl ketone can also be used. Is 15 to 30% by weight, preferably 20 to 25% by weight, based on the total amount of the coating solution, and the viscosity is 2%.
0 to 200 cps, preferably 30 to 90 cps, and the surface tension is 15 to 30 dyn / cm, preferably 18 to 25 dyn / cm.

As the non-porous support used in the present invention, a flat support such as a film, a sheet or a plate is used. For example, polyester, diacetate, triacetate, acrylic polymer, cellophane, polyvinyl chloride And films or plates made of plastics such as polycarbonate, polyimide, and polyamide, glass plates, tiles, metal plates, and the like. The thickness of the support used is not particularly limited, and any thickness can be used according to the application.

The coating as an ink receiving layer formed on the support has a dry thickness of 1 to 100 μm, especially 4 to 50 μm.
m is appropriate. If the film thickness is too thin, drying of the ink will be slow and the practicality will be poor. On the other hand, if the film thickness is too thick, the cost per sheet will increase and it will be difficult to apply uniformly, which is not preferable. As a method for forming a coating on the non-porous support, a usual coating means such as gravure coating, bar coating, reverse roll coating, knife coating, die coating and the like can be used.

[0017]

EXAMPLES Hereinafter, the recording material of the present invention will be described in more detail with reference to examples, but the following examples do not limit the present invention in any way. Example 1 Preparation of coating liquid Urea formalin resin (manufactured by Ciba-Geigy: particle size 0.1 to 3 μm) 12 (parts) Hydran HW-310 (trade name, manufactured by Dainippon Ink and Chemicals, Inc.) Sc 30% 45 poise 520 (trade name, manufactured by Kao Corporation) Sc40% 1 EFTOPEF-802 (trade name, manufactured by Mitsubishi Materials Corporation) 2 Isopropyl alcohol 8 Water remaining amount ─────────────── 100 Total 100

The mixture having the above composition was dispersed by a homogenizer to prepare a coating solution. Preparation of Recording Material The above coating liquid was used as a substrate, and a dry film thickness of 30 μm was formed on a 100 μm-thick polyvinyl chloride film by a bar coater method.
m and dried immediately at 90 ° C. for 5 minutes to obtain a recording material of the present invention. The thus-obtained recording material was subjected to inkjet recording using an inkjet printer IO-735X (manufactured by Sharp Corporation) which ejects ink using a piezo vibrator to obtain a recorded image.

Example 2 Preparation of Coating Solution Mizukasil P-78D (trade name, silicon dioxide particles 0.1 to 3 μm 14 (part) manufactured by Mizusawa Chemical Industry Co., Ltd.) Samprene UXA-3005 (trade name, Sanyo Chemical Industry Co., Ltd.) ) Manufacture) Sc40% 38 Boncoat V Sc28% 6 (trade name, manufactured by Dainippon Ink and Chemicals, Inc.) Compound 2 2 Isopropyl alcohol 15 Water Remaining amount ─────────────── 100 Total 100

The mixture having the above composition was dispersed by a homogenizer to prepare a coating solution. Preparation of Recording Material The above-mentioned coating solution was used as a substrate and applied on a 75 μm-thick PET (polyethylene terephthalate) film by a bar coater method so as to have a dry film thickness of 20 μm. To obtain a recording material of the present invention. An ink jet printer IO- which discharges ink on the recording material thus obtained by a piezo vibrator.
Inkjet recording was performed using 735X (manufactured by Sharp Corporation) to obtain a recorded image.

Example 3 Preparation of Coating Liquid Calcium Carbonate (Average Particle Size 3 μm) 18 parts Nippol Latex LX-407BP Sc50% 25 (trade name, manufactured by Zeon Corporation) Boncoat V Sc 28% 8 (trade name, Dainippon Ink and Chemicals, Inc.) Compound 3 2 Isopropyl alcohol 15 Water Remaining amount ────────────────────────────── 100 Total 100

The mixture having the above composition was dispersed by a homogenizer to prepare a coating solution. Preparation of Recording Material The above-mentioned coating liquid was applied as a substrate to a 75 μm-thick PET film by a bar coater method so as to have a dry film thickness of 20 μm, and this was immediately dried at 90 ° C. for 5 minutes. A recording material of the present invention was obtained. An ink jet printer IO-735X (manufactured by Sharp Corporation) that discharges ink by a piezo vibrator onto the recording material thus obtained.
Was used to perform inkjet recording to obtain a recorded image.

Comparative Example 1 Preparation of Coating Solution Urea Formalin Resin (manufactured by Ciba-Geigy: particle size: 0.1 to 3 μm) 12 (parts) Hydran HW-310 (trade name, manufactured by Dainippon Ink and Chemicals, Inc.) Sc30 % 45 Poise 520 (trade name, manufactured by Kao Corporation) Sc40% 1 Florard FC-98 2 (trade name, manufactured by Potassium Perfluoroalkylsulfonate Sumitomo 3M Co., Ltd.) Isopropyl alcohol 8 Water balance 100 Total 100

The mixture having the above composition was subjected to dispersion treatment with a homogenizer to prepare a coating liquid. Preparation of Recording Material The above coating liquid was used as a substrate, and a dry film thickness of 30 μm was formed on a 100 μm-thick polyvinyl chloride film by a bar coater method.
m and dried immediately at 90 ° C. for 5 minutes to obtain a recording material of the present invention. The thus-obtained recording material was subjected to inkjet recording using an inkjet printer IO-735X (manufactured by Sharp Corporation) which ejects ink using a piezo vibrator to obtain a recorded image.

(Evaluation of Recording Material) The recording characteristics of the recording material were evaluated by observing the dots with a stereoscopic microscope to determine the dot shape, the size of the dot size, and the ink size when the ink was overprinted. The bleeding was seen from the flow. The color development of the ink was visually compared with the color clarity of the ink jet recorded image. The ink absorptivity was determined by rubbing with a finger after a predetermined time the portion where two or more colors of ink were overprinted, and the dryness of the ink was observed.

The recorded images obtained by using the recording materials of Examples 1, 2 and 3 are free from dot spread and bleeding even in a single color portion of ink or in a mixed color overlapping printing portion. Was a high resolution image. In contrast, a recorded image obtained using the recording material of Comparative Example 1 was:
The image had a low ink absorption speed and large bleeding.

[0027]

The recording material of the present invention is a recording material for performing high-density recording on a support by an ink jet printer, and is particularly suitable for full-color recorded images and has excellent printing characteristics. doing.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B41M 5/00

Claims (1)

(57) [Claims] 1. 0.5 to 10% by weight based on the total weight of filler particles, binder resin and coating on a non-porous support
A recording material comprising a film containing a fluorine-based surfactant represented by the following general formula (I): Embedded image