JP3770926B2 - Display method - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a display method of a display object using a recording material, and more particularly to a method of attaching a display object to the surface of a wall or various articles using electrostatic attraction.
[0002]
[Prior Art and Problems to be Solved by the Invention]
Conventionally, in order to attach paper or a film to a wall surface, a window surface, a bulletin board, a locker, furniture, a desk, a bookshelf, or other articles, an adhesive, an adhesive tape, a magnet, or the like is generally used.
On the other hand, synthetic resin films have been proposed that can be attached to various articles using electrostatic adhesion. For example, a polyvinyl chloride film (Japanese Examined Patent Publication No. Sho 63-30940), which is provided with an organic ketone having 40 to 60 carbon atoms and imparts sustained electrostatic adhesion, and an organic tin-based stabilizer, which is provided with continuous static electricity. Polyvinyl chloride film (JP-A-58-98351) to which adhesion is imparted, polypropylene film (JP-A-61-251) formed by forming a composition comprising a propylene resin and a modified propylene resin, etc. Has been proposed.
[0003]
Since these synthetic resin films are provided with a durable electrostatic adhesion, they can be repeatedly applied to various articles without using an adhesive or the like. Moreover, the surface to be attached is not soiled.
However, although such a synthetic resin film is an alternative to an adhesive or a pressure-sensitive adhesive tape, it does not have recordability itself, so that an adherend such as a poster has a desired synthetic resin film. It must be attached to the article and then attached to it. In addition, these conventional synthetic resin films must be blended with specific substances in order to impart sustained electrostatic adhesion, and water whitening may occur when immersed in warm water exceeding 30 ° C. There was a problem such as.
[0004]
On the other hand, since ink-jet recording requires that ink be dried and fixed immediately after recording, a material having good ink receptivity has been proposed instead of paper. For example, those having a porous resin layer as an ink receiving layer (Japanese Patent Laid-Open Nos. 58-136478 and 63-56876), and those having an ink holding layer and an ink transmitting layer (Japanese Patent Laid-Open No. 61-61). No. 12388 and JP-A No. 61-35275) have been proposed.
[0005]
However, since such inkjet recording paper is not intended for display of posters and the like, when a display object created using such recording paper is displayed in the outside world for a long time, Processing such as laminating a cover sheet on the recorded surface is necessary. Moreover, in order to attach such a display to the surface of the article, it is necessary to use an adhesive as described above or a synthetic resin film utilizing electrostatic adhesion.
[0006]
Accordingly, an object of the present invention is to provide a method for displaying a display object using a recording material having both electrostatic adhesion and recording properties.
[0007]
[Means for Solving the Problems]
The display method of the present invention that achieves such an object includes a substantially transparent plastic support, an ink receiving layer formed on the support, and an electrostatic adsorption layer formed on the ink receiving layer. The electrostatic adsorption layer is a display method of a display object using a recording material composed of a porous layer formed from a polymer capable of electrostatic charge, and the display content is displayed from the electrostatic adsorption layer side. Ink-jet recording is performed with a mirror image, the ink is fixed on the ink receiving layer, the electrostatic adsorption layer is charged, and is adhered to the adherend by the electrostatic adsorption force so that the display content can be seen from the plastic support side. It is characterized by that.
[0008]
As shown in FIG. 1, the recording material of the present invention typically records a mirror image 4 from the electrostatic adsorption layer 3 side by ink jet recording, and fixes the ink on the ink receiving layer 2. Next, the electrostatic adsorption layer 3 is rubbed against the adherend 5 to charge the electrostatic adsorption layer 3 and adhere to the adherend 5 by the electrostatic adsorption force. The recorded image 4 is protected by the plastic support 1 and can be viewed from the plastic support 1 side.
[0009]
The recording material of the present invention will be further described.
First, as a substantially transparent plastic support, plastic films such as polyester resin, polypropylene resin, diacetate resin, triacetate resin, acrylic resin, polycarbonate resin, polyvinyl chloride resin, polyimide resin, etc. Alternatively, a sheet can be used. As these supports, those that have been subjected to an easy adhesion treatment in order to improve the adhesion to the ink receiving layer provided thereon can be used. In addition, the term “substantially transparent” is sufficient if it has transparency that allows an image formed on the ink receiving layer to be visually recognized from the support side. Therefore, the support may be colored within a range that does not impair this visibility, or may be matted. The coloring or matting treatment may be partially performed. Further, a layer such as an anti-curl layer, an ultraviolet absorbing layer, or a hard coat layer may be provided on the surface opposite to the ink receiving layer described later as long as transparency is not impaired. The ultraviolet absorbing layer and the hard coat layer impart weather resistance and scratch resistance, and are particularly significant when the recording material of the present invention is used as an outdoor display material.
[0010]
Although the thickness of the support is not particularly limited, it has a necessary thickness (for example, 38 to 250 μm) as a recording material, and adheres to an adherend when the recording material of the present invention is adhered to an article. It is preferable that the thickness is flexible enough to provide the thickness.
The ink receiving layer is a layer for fixing and holding ink that has oozed through the electrostatic adsorption layer formed thereon, and is particularly suitable for ink jet recording, that is, ink absorbability and ink color development for water-alcohol and water-soluble inks. It is preferable that the layer is excellent. Examples of the resin that forms such an ink receiving layer include polyamide, polyacrylamide, polyvinyl pyrrolidone, polyethylene imine, polyvinyl pyridilium halide, melamine resin, polyurethane, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxymethyl cellulose, polyvinyl alcohol, polyester, Examples include hydrophilic synthetic polymers such as sodium polyacrylate, hydrophilic natural polymers such as gelatin, starch, cellulose, casein, chitin, and chitosan, and superabsorbent resins such as polyethylene oxide and copolymers thereof. Moreover, you may mix | blend lipophilic resin like a (meth) acrylic acid ester copolymer with these hydrophilic resins suitably. As a result, the performance required for ink jet recording paper, such as ink adsorption, water resistance, weather resistance, and the like, can be improved.
[0011]
Further, a matting agent may be added to these resins in the ink receiving layer. As the matting agent, known matting agents such as silica (non-crystalline silica), clay, talc, diatomaceous earth, calcium carbonate, calcium sulfate, barium sulfate, aluminum silicate, titanium oxide, zinc oxide, synthetic zeolite, alumina, etc. In addition, smectite can be used, and these matting agents can be used alone or in admixture of two or more. The addition amount of the matting agent is usually about 5 to 200 parts with respect to the resin 100. When the addition amount exceeds 200, the binding ability of the resin is lost, which is not preferable. In addition to the matting agent, the ink receiving layer may contain additives such as a leveling agent, an ultraviolet absorber, and an antioxidant.
[0012]
The ink-receiving layer is prepared by dissolving or dispersing the above-mentioned resin alone or mixed and necessary additives in an appropriate solvent to prepare a coating solution, for example, roll coating method, bar coating method, air knife coating method, spraying It is applied and dried on a support by a known method such as a coating method. As the solvent, organic solvents such as propylene glycol monomethyl ether, methylene glycol monomethyl ether, ethyl alcohol, methyl alcohol, isopropyl alcohol, and water are used. The thickness of the ink receiving layer is not particularly limited, but is usually about 0.1 to 50 μm, preferably about 1 to 20 μm. If it exceeds 50 μm, the ink is absorbed only on the surface of the layer, and a sufficient ink density cannot be obtained.
[0013]
The electrostatic adsorption layer is charged by rubbing and adheres a recording material recorded by the electrostatic adsorption force to the surface of the article, and is composed of a porous layer made of a polymer capable of electrostatic charge. Examples of the electrostatic chargeable polymer include acrylic resin, vinyl chloride / vinyl acetate resin, vinyl chloride / vinyl acetate / maleic acid resin, styrene / acrylic resin, cellulose acetate resin, ethyl cellulose resin, phenol resin, acrylonitrile / vinylidene chloride resin, A nitrocellulose etc. can be mentioned.
[0014]
These resins are charged by friction even when a uniform coating film (solid film) is formed, but the charging effect is remarkably improved by making the resin porous. The porous layer has open pores on the surface of the membrane, and open cells or partial open cells are formed in the thickness direction of the membrane, and a coating film having fine pores having a diameter of about 5 μm or less, So-called fine holes can be formed. The microporous film can be formed by dissolving in a solvent mixed with a solvent that dissolves the polymer well (good solvent) and a solvent that hardly dissolves (poor solvent), and applying and drying on the ink receiving layer. The diameter of the hole can be adjusted by changing the mixing ratio of the good solvent and the poor solvent. Further, the porous layer may be a coating film having a coarse open hole having a diameter of about 5 μm to 100 μm, that is, a so-called brushing film. The brushing film can be formed by applying a polymer solution and then drying it in a humidity atmosphere of about 60 to 80%. Usually, the surface layer is an open cell having about 5 bubbles.
[0015]
In addition, since the electrostatic adsorption layer of the present invention is usually formed by applying and drying a polymer solution as described above, the resin of the ink receiving layer which is the lower layer may not be dissolved during the formation. It is necessary. For this reason, it is preferable to combine a resin that constitutes the electrostatic adsorption layer and a resin that constitutes the ink receiving layer with an incompatible resin. For example, when the resin constituting the ink receiving layer is a water-soluble and non-oil-soluble resin such as polyvinyl alcohol, gelatin, hydroxyethyl cellulose, etc., all of the resins described above can be used as the resin constituting the electrostatic adsorption layer. . When the resin constituting the ink receiving layer is a water-soluble and oil-soluble resin such as polyvinylpyrrolidone, the resin that dissolves in a solvent that does not dissolve the resin is used as the resin constituting the electrostatic adsorption layer. The electrostatic adsorption layer of the present invention can also be provided by lamination. In that case, the resins do not need to be incompatible.
[0016]
The triboelectric charge amount (surface charge) of the electrostatic adsorption layer varies depending on the object to be rubbed, but is preferably +0.9 kV or more or −0.9 kV or less, particularly +1.1 kV or more or −1.1 kV or less. It is preferable. Thereby, it can be easily attached to the surface of a normal article such as glass or a resin-coated surface by rubbing several times, and the adhesion can be maintained for a long time. The electrostatic adsorption layer of the present invention can obtain a large amount of triboelectric charge by using the above polymer and making the layer structure porous.
[0017]
The thickness of the electrostatic adsorption layer is not particularly limited, but is preferably in the range of 2 to 30 μm from the viewpoints of mechanical strength against friction, recording suitability, and the like. By setting the thickness to 2 μm or more, it is possible to improve the receptivity and fixability of the ink to the ink receiving layer and to maintain the necessary electrostatic adsorption ability. By setting the thickness to 30 μm or less, the sharpness without spreading of the ink Can be obtained.
[0018]
The recording material of the present invention configured as described above records a mirror image on the electrostatic adsorption layer side by a normal ink jet printer. At this time, since the electrostatic adsorption layer is a porous layer, the ink passes without being adsorbed to the electrostatic adsorption layer and reaches the ink receiving layer below it. The ink receiving layer is particularly suitable for ink jet recording, and therefore adsorbs and holds ink. The image formed by the ink can be viewed as a normal image from the side of the plastic support, and the plastic support functions as a protective film to protect the image from discoloration, fading and stains. The recording material thus recorded can be attached to a desired article by electrostatic adsorption force by charging the electrostatic adsorption layer by friction. In this case, since the electrostatic adsorption layer of the present invention has an excellent electrostatic adsorption force, it can be easily applied only by rubbing it to a wall, a window glass, etc. several times, and the application state is maintained for a long time. be able to.
[0019]
【Example】
Examples of the present invention will be described below.
Example 1
Using a transparent polyester film having a thickness of 100 μm, an ink receiving layer coating solution having the following formulation was applied and dried on one side with a bar coater to a dry thickness of 10 μm.
[0020]
PVP (K-90: manufactured by ISP) 3 parts by weight (meth) acrylic acid ester copolymer 2 parts by weight Methyl cellosolve 45 parts by weight On this ink-receiving layer, a coating solution for an electrostatic adsorption layer having the following formulation was applied. After coating with a bar, it was dried at 60 ° C. for 5 minutes with a dryer to form a porous layer having an open pore with an average thickness of 2 μm and a thickness of 6 μm.
[0021]
10 parts by weight of nitrocellulose (manufactured by Asahi Kasei Corporation, HIG1 / 2)
67.5 parts by weight of acetone 22.5 parts by weight of xylene Mirror image printing was performed on the electrostatic recording layer of the obtained recording material with an ink jet printer (DESKJET 500J: manufactured by Hewlett Packard) to produce a display. This display was rubbed several times on the glass window, wall (the rough surface of the surface sprayed with paint), and the side of the refrigerator, and left to stand. As a result, it did not peel off even after one month, and no fading of the image was observed.
[0022]
Example 2
A coating liquid for ink receiving layer having the following formulation is applied to one side of a 75 μm thick transparent polyester film to a film thickness of 5 μm, dried at 100 ° C. for 5 minutes with a dryer, The electroadhesive layer coating solution was further applied and dried at 60 ° C. for 10 minutes to obtain a recording material on which a porous layer having an average thickness of 0.8 μm and having a thickness of 8 μm was formed.
1. 10 parts by weight of polyvinyl alcohol resin for ink receiving layer coating (manufactured by Nippon Synthetic Chemical Industry, Gohsenol KH-17)
1. 90 parts by weight of pure water Coating solution for electrostatic adsorption layer 10 parts by weight of vinyl chloride / vinyl acetate resin (manufactured by Zeon Corporation, 400 × 150S)
Methyl ethyl ketone 65 parts by weight n-butanol 35 parts by weight The obtained recording material was subjected to mirror image printing with an ink jet printer (Deskjet 500J: manufactured by Hewlett Packard), and then a wall (a rough surface on which the paint was sprayed), the number The two were rubbed together and left in contact. As a result, it did not peel off even after one month.
[0023]
Example 3
An ink receiving layer coating liquid having the following formulation was applied to one side of a 75 μm thick polyester film to a film thickness of 5 μm, dried at 100 ° C. for 5 minutes with a dryer, and then electrostatically charged with the following formulation. The adsorption layer coating solution was further applied and dried at 60 ° C. for 10 minutes with a dryer maintained at a humidity of 80% to obtain a brushed recording material having a bubble diameter of about 30 μm.
1. Ink-receptive layer coating solution Polyethylene oxide resin crosslinked product 10 parts by weight (manufactured by Sumitomo Seika Co., Ltd., Aqua Coke)
90 parts by weight of cyclohexanone Electrostatic adsorption layer coating liquid Styrene / acrylic resin 5 parts by weight (manufactured by BASF, EMU powder)
Ethanol 50 parts by weight Acetone 45 parts by weight The resulting recording material was mirror-image printed with an inkjet printer (Deskjet 500J: manufactured by Hewlett Packard), and then rubbed several times on the wall (the rough surface to which the paint was sprayed) They were left in contact with each other. As a result, it did not peel off even after one month.
[0024]
【The invention's effect】
As is clear from the above examples , according to the present invention , since the recording material provided with the ink receiving layer and the electrostatic adsorption layer is used , the recorded article is directly used as the desired article by the electrostatic adsorption force. Can be attached to. In addition, the recording material used in the display method of the present invention can maintain the adhesive force for a long time because the electrostatic adsorption layer is made of a material and structure having an excellent electrostatic adsorption force. Can pass the electrostatic adsorption layer without holding the ink, and can form a recorded image on the ink receiving layer below the electrostatic adsorption layer. Further, since the recording material used in the display method of the present invention has a structure in which an ink receiving layer and an electrostatic adsorption layer are laminated on a substantially transparent support, an image formed on the ink receiving layer is a support. Can prevent discoloration, fading, and adhesion of dirt.
[Brief description of the drawings]
FIG. 1 is a diagram showing the structure of a recording material of the present invention and its use.
DESCRIPTION OF SYMBOLS 1 ... Plastic support 2 ... Ink receiving layer 3 ... Electrostatic adsorption layer 4 ... Image

Claims (1)

A substantially transparent plastic support; an ink receiving layer formed on the support; and an electrostatic adsorption layer formed on the ink receiving layer, wherein the electrostatic adsorption layer is electrostatically charged. A display method for a display using a recording material composed of a porous layer formed of a possible polymer ,
Inkjet recording of the display content from the electrostatic adsorption layer side as a mirror image, fixing the ink on the ink receiving layer, charging the electrostatic adsorption layer, and attaching it to the adherend by its electrostatic adsorption force, A display method in which the display contents are shown from the plastic support side.

Images