JP3006002B2 - Recording material - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a recording material, and more particularly, to a film formed on a flat surface of a porous support by which a film capable of high-density recording by an ink jet printer is formed. The present invention relates to a recording material for an ink jet printer.

[Related Art] Inkjet printers have begun to spread in recent years due to 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 jet nozzles, and the components of this ink include binder, dye, additives, etc., water, polyhydric alcohol, polyhydric alcohol ether,
It is generally dissolved in pyrrolidone or the like.

For this reason, when printing and recording is performed by an ink jet printer, the recording sheet needs to have water absorbency, and paper specially designed to impart a performance of sufficiently absorbing ink is usually used.

On the other hand, with the colorization of inkjet printers, recording is performed on various types of recording materials and used as base paper for overhead projectors (OHP),
The demand for use as exterior goods is increasing.

These recording materials usually consist of plastic films, glass plates, metal plates, tiles, etc., and these plastic films, glass plates, metal plates, tiles, etc. are non-porous and hydrophobic, and do not use aqueous ink for inkjet printers at all. Since the ink is not absorbed, the ink directly recorded thereon is not easily dried, and if it is rubbed with a finger or superimposed, the recorded portion becomes dirty, which is not practical.

That is, as a recording material used in the ink jet recording method, in order to obtain a high-resolution and high-quality recording image, 1) absorption of ink should be as quick as possible, and 2) when ink dots overlap. 3) that the diameter of the ink dots does not become larger than necessary, 4) the shape of the ink dots is close to a perfect circle, and the surrounding area is smooth. 5) The density of the ink dots is high, and the periphery of the dots is not blurred. 6) The color development of the ink is excellent. 7) The sheet for OHP or the like has a transparent adsorption layer. 8) It is necessary to satisfy required performances such as having excellent water resistance.

In order to meet such demands, many methods for coating a specific polymer on a plastic film have been proposed. For example, JP-A-57-14,091, JP-A-59-11,284,
JP-A-59-33,179, JP-A-60-132,785, JP-A-60-160
No. 145,875, JP-A-60-220,750, JP-A-61-193,87
9 and JP-A-62-21579.

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
No one that meets these requirements has yet been found.

[Problems to be Solved by the Invention] In view of such problems, the present invention sufficiently satisfies the above-mentioned required characteristics, and is particularly excellent in ink absorbency, color development and adhesiveness, and is suitable for use in surface image observation. In addition, the present invention provides a recording material suitable for inkjet recording that can be used in optical devices such as slides, OHPs, and contact printers, because a transparent recording layer can be formed, so that transmitted light of a recorded image is used. is there.

[Means for Solving the Problems] In the present invention, a film containing a binder resin and 5 to 20% by weight of a fluorine-based surfactant based on the total weight of the film is formed on a non-porous support. The material to be recorded is a gist.

As the binder resin used in the present invention, any of conventionally known aqueous emulsion resins and water-soluble resins can be used.

Specific examples of these aqueous emulsion resins include an ionomer-type aqueous urethane resin, an acrylic resin, a styrene-butadiene resin, and a vinyl acetate resin.

Specific examples of the water-soluble resin include polyvinyl alcohol, polyvinyl acetal, polyvinyl pyrrolidone, carboxymethyl cellulose, polyacrylamide, gelatin, starch and the like. These resins may be used alone or in combination of two or more.

The fluorine-based surfactant is appropriately selected from commercially available ones, and may be any of an anionic surfactant, a cationic surfactant, and a nonionic surfactant. Surfactants are preferred.

Specific examples of the fluorine-based anionic surfactant include Fluo
rad FC-129 (trade name, manufactured by 3M Company), EFTOP EF-112 (trade name, manufactured by Shin-Akita Chemical Co., Ltd.), and specific examples of the fluorine-based cationic surfactant include Fluorad FC-135 (trade name, Three
M Company), EFTOP EF-112 (trade name, Shin-Akita Chemical Co., Ltd.)
Production), specific examples of the fluorine-based nonionic surfactant include Fluorad FC-170C (trade name, manufactured by 3M Company), Surflon S (trade name, manufactured by Asahi Glass Co., Ltd.), EFTOP EF-122C
(Trade name, manufactured by Shin-Akita Chemical Co., Ltd.). The addition amount of these fluorine-based surfactants is 5 to 20% by weight, preferably 5 to 10% by weight based on the total weight of the film.

As the non-porous support used in the present invention, a film, a sheet, a plate-like one such as a plate is used, for example, polyester, diacetate, triacetate, acrylic polymer, cellophane, celluloid, polyvinyl chloride,
A film or plate made of a plastic such as polycarbonate, polyimide, or polyamide, a glass plate, a tile, a metal plate, or the like can be used. The thickness of the support used is not particularly limited, and any thickness can be used according to the application.

The coating solvent used for forming a film on the support mainly includes water, and may further include a lower alcohol such as isopropyl alcohol and a lower alkyl ketone such as methyl ethyl ketone.

The film formed on the support as the ink absorbing layer has an appropriate dry thickness of 1 to 100 μm, particularly 4 to 50 μm. If the film is too thin, the drying of the ink will be slow and the practicality will be poor. On the other hand, if the film is too thick, the price per sheet will increase and the coating will be difficult.

In forming the film on the support, the coating solution may be directly applied as it is, but if the adhesion between the support and the formed film is insufficient, the coating may be applied before forming the film. It is preferable that a primer is provided on the body.

As a method of forming a film on the support, a usual coating means such as a gravure coat, a bar coat, a reverse roll coat, and a knife coat can be used.

In the present invention, even if the film is formed only on one side of the support,
It may be formed on both sides.

In the present invention, organic and / or inorganic fine particles can be dispersed in a film on a support.

Examples of the organic fine particles include fine particles such as polystyrene, polyethylene, polyethylene urea, and urea formaldehyde resin, and urea formaldehyde resin is particularly preferable from the viewpoint of ink absorbability.

These organic fine particles include those having a particle size in the range of 0.1 to 10 μm, and preferably 0.3 to 5 μm.

Examples of the inorganic fine particles include fine particles such as colloidal silica and titanium dioxide. When forming a transparent recording material, colloidal silica fine particles are preferable, and when forming an opaque recording material, titanium dioxide fine particles are particularly preferable.
Colloidal silica fine particles are 10 to 100 nm, preferably 2 to 100 nm.
Particles having a particle diameter in the range of 0 to 50 nm are used, and fine particles of titanium dioxide having a particle diameter in the range of 0.1 to 10 μm, preferably 0.3 to 5 μm are used. It is desirable that these fine particles be used in an amount of 10 to 70% by weight based on the total weight of the film.

Further, various known additives such as a dispersant, an antifoaming agent, and a pH adjuster can be added to the film on the support.

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 A polyvinyl chloride film having a thickness of 200 μm was used as a support, and 80 parts by weight of Hydran HW-310 (ionomer type aqueous urethane resin, trade name: manufactured by Dainippon Ink and Chemicals, Inc.) as an ink absorbing layer ( Resin solid content 30%), Voncoa
t V (acrylic resin, trade name: Dainippon Ink & Chemicals, Inc.) 4.5 parts by weight (resin solid content 30%), Eslec W-201 (polyvinyl acetal resin, trade name: Sekisui Chemical Co., Ltd.) 2 parts by weight (resin solid content 25%), Fluorad FC
-129 (fluorinated anionic surfactant, trade name: 3M)
3.0 parts by weight, Demol EP (polycarboxylate type dispersant,
A product consisting of 0.2 parts by weight of Kao Corporation, 30 parts by weight of urea formaldehyde resin (particle size: 0.1 to 3 μm) and 130 parts by weight of water and a dry coat thickness of 20 parts by a bar coater method.
The film was coated on a film to a thickness of μm and dried at 80 ° C. for 10 minutes to obtain a recording material of the present invention.

The recording material thus obtained was subjected to ink jet recording using an ink jet printer IO-730 (manufactured by Sharp Corporation) for discharging ink by a piezo vibrator to obtain a recorded image.

The recorded image obtained as described above was tested for the following two items, and the recording suitability of the recording material was evaluated.

(1) Quick-drying After inkjet recording, leave the recorded material at room temperature for 60 minutes.
The ink was not sufficiently attached to the finger even when the finger touched the recorded portion after a lapse of seconds, and the ink was sufficiently dried.

(2) Image Quality The obtained image was a high-resolution image without spreading or bleeding of ink.

Example 2 A 100 μm polyethylene terephthalate film was used as a support, and Gohsenol GL was used as an ink absorbing layer.
-03 (polyvinyl alcohol, trade name: manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) 8 parts by weight, Penon JE-66 (etherified starch, trade name: manufactured by Nisseki Chemical Co., Ltd.) 2 parts by weight, Fluorad
A composition consisting of 0.7 parts by weight of FC-170C (fluorinated nonionic surfactant, trade name: manufactured by 3M) and 40 parts by weight of water is applied on a film by a bar coater method so that the dry film thickness becomes 10 μm. did.

After drying, a recorded image was formed and evaluated in the same manner as in Example 1, and good results were obtained for the above items (1) and (2).

In addition, as a result of projecting the recorded image on the screen by OHP and visually observing and judging, a non-recorded portion is bright, the OD (optical density) of the recorded image is high, and a clear and easy-to-view projected image with high contrast is obtained. Was.

[Effects of the Invention] 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 excellent in quick drying properties of ink after recording, printing quality, and the like.

Further, the recording material of the present invention is not only used for surface observation of the recorded image, but also as a recording material for use in optical devices such as slides, OHPs, and contact printers utilizing transmitted light of the recorded image. Are particularly excellent in translucency and are useful.

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-63-25086 (JP, A) JP-A-63-252779 (JP, A) JP-A-1-146784 (JP, A) JP-A-1- 146785 (JP, A) JP-A-2-223465 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B41M 5/00

Claims (1)

(57) [Claims] 1. A recording material comprising a binder resin and a film containing 5 to 20% by weight of a fluorine-based surfactant based on the total weight of the film on a non-porous support. .