JPH07104673A - Electrostatic recording material and production of display using the same - Google Patents

Abstract

PURPOSE:To easily produce an outdoor display, such as a large-sized display, poster or signboard. CONSTITUTION:A conductive layer 3 and a dielectric layer 4 are successively laminated on a substantially transparent plastic substrate into which a UV absorbent is kneaded to constitute an electrostatic recording material A. This UV absorbent may be kneaded into the conductive layer 3 or the dielectric layer 4 and another layer contg. the UV absorbent may be disposed on or below the substrate 1. A specular image is formed by an electrostatic plotter on the dielectric layer of such electrostatic recording material and thereafter, the dielectric layer is stuck via a tacky adhesive layer to a base material, such as plate or film, by which the display, such as poster or notice board, is obtd. The image is protected by the substrate 1 in such display and is visible as an erecting image from the substrate 1 side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic recording material for producing a display such as a large display, a large poster, a signboard, etc., and a method for producing the display using such an electrostatic recording material. Particularly, the present invention relates to an electrostatic recording material capable of manufacturing a display object by an extremely simple process.

[0002]

2. Description of the Related Art In recent years, display boards such as displays, posters, and signboards have been produced by using an electrostatic plotter or the like, which is produced by a transfer system such as so-called space art system. In such a transfer system, as shown in FIG. 5, a drawing input by a scanner or the like is first printed on an electrostatic recording paper 100 by an electrostatic plotter (a). As the electrostatic recording paper, a conventionally used electrostatic recording paper in which a conductive layer 12 and a dielectric layer 13 are sequentially laminated on a support 11 such as paper is used. Next, the adhesive layer 21 of the cover film 22 provided with the adhesive layer 21 is attached to the dielectric layer of the electrostatic recording paper on which the image 14 is formed as described above (b), and the fading of the image formed on the dielectric layer is performed. prevent. Then, the paper 11 of the electrostatic recording paper 100 is peeled off (c). Here, the conductive layer 12 is usually a paper 11 coated with a water-soluble resin solution containing a conductive agent such as a surfactant, and can be easily dissolved by water to separate the dielectric layer 13 and the paper 11.

After transferring the image to the cover film 22 side in this manner, the adhesive layers 31, 31 are formed on both sides, and the base paper 33 having the release paper 32 adhered on one side thereof is transferred to the dielectric film 40 of the film 40. It is attached to the layer 13 side. The base paper 33 is made of a film having a thickness and performance required as a display film, and thus a display film is obtained. This display film is used as a display, a poster, a signboard, or the like by peeling off the release paper 32 and attaching it to a necessary place.

[0004]

By the way, in the case of producing a display film by such a conventional transfer system, after forming an image on an electrostatic recording sheet, a cover film is attached and an electrostatic recording sheet is attached. At least three steps are required for peeling the support and adhering the base paper, and the manufacturing is complicated, and the support (paper) of the electrostatic recording paper is wastefully consumed.

The present invention has been made in order to solve the above-mentioned conventional drawbacks, and it is extremely easy to produce a display film, and an electrostatic recording material using no paper or film waste, and the same are used. It is an object of the present invention to provide a method for manufacturing a display object.

[0006]

The electrostatic recording material of the present invention which achieves such an object comprises a conductive layer and a dielectric layer which are successively provided on a support made of a substantially transparent plastic film, At least one of the support, the conductive layer, and the dielectric layer, or a layer provided separately from these layers has an ultraviolet absorbing ability.

Here, the plastic film serving as a support is a film of vinyl chloride resin, polyester, acrylic resin, polycarbonate, fluororesin, etc., and has a thickness required for recording by an electrostatic plotter, 50 μm to 20 μm.
Those having a thickness of about 0 μm are used. When a support thinner than 50 μm is used, a reinforcing film may be attached to the opposite surface of the support, and the reinforcing film may be peeled off after image formation before use. The support is also preferably substantially transparent so that the image formed on the dielectric layer can be seen from the support side. The term “substantially transparent” means that the image formed on the dielectric layer can be discriminated from the support side, and it may be colored or the surface may be roughened.

The conductive layer includes polyvinylbenzyltrimethylammonium chloride, 2-acryloylethyltrimethylammonium chloride, poly-2-methacryloyloxyethyltrimethylammonium chloride, poly2-hydroxy-3-methacryloyloxypropyltrimethylammonium chloride, polyvinyltrimethylammonium chloride, A conductive agent such as poly-2-acryloxyethyl dimethylsulfonium chloride is mixed with an aqueous solution or an organic solvent solution of polyvinyl alcohol, methyl cellulose, polyvinyl butyral, etc., and the mixture is applied onto a plastic film and dried to form it.

The above-mentioned resins may be used as the resin for the conductive layer, but when the electrostatic recording material of the present invention is used as an outdoor display, the conductive layer remains as it is, so that the film edge is kept in an outdoor environment. Water is absorbed into the conductive layer from the
This may cause peeling between adjacent layers. Therefore, as the conductive layer in this case, a metal oxide of ITO, tin oxide, tin oxide, antimony, or the like, or a metal electron conductive type conductive agent is vapor-deposited on the plastic film, or an electron conductive type conductive agent is acrylic. -Based resin, ethylene-vinyl acetate copolymer, polyvinyl butyral resin, silicone resin, thermoplastic polyester resin, polystyrene resin, vinyl chloride-vinyl acetate copolymer and cellulose derivative resin Then, it is preferably formed by applying and drying this on a plastic film.

The dielectric layer is a dielectric such as acrylic resin, ethylene-vinyl acetate copolymer, polyvinyl butyral resin, silicone resin, thermoplastic polyester resin, polystyrene resin, vinyl chloride-vinyl acetate copolymer and cellulose derivative resin. It is formed by applying a coating liquid obtained by dissolving or dispersing a resin in water or an organic solvent on the conductive layer. Incidentally, titanium dioxide, zinc oxide, calcium carbonate, barium sulfate, magnesium oxide, silicon dioxide and the like can be added to the dielectric layer within the range not impairing the transparency.

The above-mentioned support, conductive layer or dielectric layer,
Alternatively, in order for the layer provided separately from these layers to have an ultraviolet absorbing ability, the ultraviolet absorber is kneaded into at least one of the support, the conductive layer or the dielectric layer, or the layer containing the ultraviolet absorber is added to these layers. You may make it laminate | stack on the upper and lower sides of a layer, or between them. Further, the resin itself may be formed of a material having an ultraviolet absorbing ability. Examples of the ultraviolet absorber include benzophenone-based, salicylate-based, and benzotriazole-based UV absorbers, and those which do not impair the substantial transparency of the support, the conductive layer and the dielectric layer are used. In the case of kneading, about 0.01 to 10% by weight is added to the resin forming the layer. As a method of laminating, an ultraviolet absorber and an acrylic resin, an ethylene-vinyl acetate copolymer, a polyvinyl butyral resin, a silicone resin, a thermoplastic polyester resin, a polystyrene resin, a vinyl chloride-vinyl acetate copolymer and a cellulose derivative resin, etc. The coating liquid containing the above resin is applied or spray coated.

When the electrostatic recording material of the present invention is used as an outdoor display, the ultraviolet absorber is kneaded into a support which is a surface directly exposed to the outdoor environment, or a layer containing the ultraviolet absorber is provided on the support. It is preferable to provide it. Also in this case, an ultraviolet absorber may be further kneaded into the conductive layer and / or the dielectric layer. In the electrostatic recording material of the present invention formed as described above, since the support is a plastic film and the recording material has an ultraviolet absorbing ability, the support itself functions as a cover film for an image. As described above, the display product can be easily manufactured only by sticking to the base material via the pressure-sensitive adhesive layer without passing through the steps of peeling the conductive layer and the support and sticking the cover film.

Next, a method of manufacturing a display object using the electrostatic recording material of the present invention will be described. The method for producing a display product of the present invention comprises forming a mirror image on the dielectric layer of the above-mentioned electrostatic recording material by electrostatic recording, and then adhering the surface of the dielectric layer to a substrate via an adhesive layer. In this case, the support of the electrostatic recording material functions as a cover film for protecting the image and can be seen as a normal image from the support side. Here, the display object includes all those used for display indoors or outdoors such as a display, a poster, and a signboard, and also includes a display film for producing such a display object.

As the base material, any material can be used as long as the electrostatic recording material of the present invention can be adhered thereto, such as glass, acrylic resin, metal, wood boards, paper, plastic film, etc. It can be appropriately selected and used according to the intended display object such as a signboard. The pressure-sensitive adhesive layer may itself be provided directly on the image-formed dielectric layer, or a base paper or film having a pressure-sensitive adhesive layer formed on both sides may be attached. As the pressure-sensitive adhesive layer, a commonly used adhesive or pressure-sensitive adhesive can be used. In any case, it is preferable that release paper is attached to the pressure-sensitive adhesive layer on the surface, and the release paper is peeled off when the display is manufactured. By peeling off the release paper and attaching the pressure-sensitive adhesive layer to a necessary portion, a display object such as a poster or a signboard can be produced.

Alternatively, such a pressure-sensitive adhesive layer may be formed on the base material side, and the dielectric layer having an image formed thereon may be attached to this pressure-sensitive adhesive layer. According to the method for producing a display film of the present invention, by forming a mirror image on the dielectric layer, the image can be viewed as a normal image from the side of the substantially transparent support, and the image can be viewed from the external environment by the support. Can provide protected display.

[0016]

EXAMPLES Examples of the present invention will be shown below. Example 1 A coating liquid prepared by adding a benzophenone-based ultraviolet absorber in an amount of 0.1 part by weight to 100 parts by weight of a two-component curing type urethane resin dissolved in an organic solvent was prepared with a Mayer bar to give a thickness of 5 parts.
A UV absorbing layer 2 having a thickness of 10 μm was obtained by coating and drying it on a support 1 (FIG. 1) made of a polyester film having a thickness of 0 μm.

On the opposite side of the support, a coating solution for a conductive layer, in which 100 parts by weight of a metal oxide of tin oxide / antimony is dispersed in 80 parts by weight of saturated polyester dissolved in an organic solvent, is applied by a Mayer bar. Dried to a thickness of 0.7
A conductive layer 3 having a thickness of μm was obtained. A dielectric layer 4 is formed on the conductive layer 3.
As for 10 parts by weight of polymethylmethacrylate dissolved in an organic solvent, 10 parts of amorphous silica (particle size 6 μm)
An electrostatic recording material A is prepared by applying a dispersion of parts by weight and coating and drying with a Mayer bar so as to have a thickness of 5 μm.
(FIG. 1 (a)) was obtained.

This electrostatic recording material A was used as an electrostatic plotter C.
After producing a mirror image I using E-3424 (manufactured by Versatech), it is attached to a vinyl chloride sheet (base material) 6 having a thickness of 2 mm and having an adhesive layer 5 on one side, and used as a poster or the like. A film was obtained (FIG. 1 (b)). This display film and a display film as Comparative Example 1 which does not have an ultraviolet absorbing layer and has the same structure as in Example 1 except for the above are used in a fade meter (Suga Test Instruments Co., Ltd.) using ultraviolet carbon as a light source. )) Was subjected to a light resistance test for 600 hours (corresponding to 3 years of outdoor exposure), and as shown in Table 1, the display film of this example showed a difference in color difference from the display film of Comparative Example 1. (ΔE) was small, and it had an effect of suppressing discoloration due to ultraviolet rays. The color difference is measured according to JIS-K7105 with reference to that before the light resistance test,
It was determined by the Hunter color difference formula.

[0019]

[Table 1]

Example 2 On a support 1 (FIG. 2) of a 125 μm thick polyester film, the same conductive layer coating solution as in Example 1 was applied and dried to form a 0.7 μm thick conductive layer 3. Obtained. On this conductive layer 3, as a dielectric layer 7 having an ultraviolet absorbing effect, 20 parts by weight of calcium carbonate (particle size 8 μm) was dispersed in 100 parts by weight of polyvinyl butyral dissolved in an organic solvent. A mixed solution containing 5 parts by weight of an absorbent was applied and dried with a Mayer bar and laminated to have a thickness of 8 μm to obtain an electrostatic recording material B (FIG. 2 (a)).

This electrostatic recording material B was used as an electrostatic plotter C.
A mirror image I was prepared using E-3424 (manufactured by Versatech) and then laminated with an acrylic plate (base material) 6 having a thickness of 5 mm having an adhesive layer 5 on one side to obtain a display plate (FIG. 2).
(B)). This display plate and a display plate having the same structure as the display plate of Example 2 except that the dielectric layer does not contain an ultraviolet absorber in Comparative Example 2 are used in a fade meter (suga test) using ultraviolet carbon as a light source. When a light resistance test was performed for 600 hours (corresponding to 3 years of outdoor exposure) using a container, the display panel of the present example showed a higher brightness than that of Comparative Example 2 as shown in Table 1. The color difference (ΔE) was small and there was an effect of suppressing discoloration due to ultraviolet rays. Example 3 The same conductive layer coating solution as in Example 1 was applied and dried on the support 1 (FIG. 3) of a polyester film having a thickness of 125 μm to obtain a conductive layer 3 having a thickness of 0.7 μm.

On the conductive layer 3, as a UV absorbing layer 2, a benzophenone type UV absorbing agent added at a ratio of 0.5 part by weight to 100 parts by weight of an acrylic resin dissolved in an organic solvent is used as a Mayer bar. Then, it was applied and dried to obtain an ultraviolet absorbing layer 2 having a thickness of 5 μm. This UV absorbing layer 2
A dielectric layer 4 on which 10 parts by weight of non-crystalline silica (particle size 6 μm) was dispersed in 100 parts by weight of vinyl chloride / vinyl acetate copolymer resin dissolved in an organic solvent, using a Mayer bar. An electrostatic recording material C was obtained by coating and drying and stacking so as to have a thickness of 4 μm (FIG. 3A).

This electrostatic recording material C is applied to an electrostatic plotter 6
A mirror image I was prepared using 8436 (manufactured by Calcomp Corp.) and then laminated with a 2 mm thick vinyl chloride sheet 6 having an adhesive layer 5 on one side to obtain a display film (FIG. 3).
(B)). This display film and a display film which does not have an ultraviolet absorbing layer as Comparative Example 3 and has the same structure as in Example 3 except for the above are used in a fade meter (Suga Test Instruments Co., Ltd.) using ultraviolet carbon as a light source. When a light resistance test was performed for 600 hours (corresponding to 3 years of outdoor exposure), the display film of this example showed a color difference (compared to the display film of Comparative Example 3) as shown in Table 1. ΔE) was small, and it had an effect of suppressing discoloration due to ultraviolet rays. Example 4 The film itself has an ultraviolet absorbing effect and has a thickness of 25 μm.
Using an acrylic film of m as a support 1 ', 100 parts by weight of a metal oxide of tin oxide / antimony was dispersed on one side of the film, with respect to 80 parts by weight of a polyester emulsion dispersed in a water / alcohol mixed solvent. The conductive layer coating liquid was applied and dried using a Mayer bar to obtain a conductive layer 3 having a thickness of 1.2 μm. On this conductive layer 3,
A dielectric layer 4 was laminated in the same manner as in Example 1 to obtain an electrostatic recording material D (FIG. 4 (a)).

The electrostatic recording material D has a total thickness of about 30.
At μm, it is too thin to output with an electrostatic plotter.
80 μm thick with weak adhesive layer 8 on the opposite side of support 1 ′
The reinforcing material composed of the vinyl chloride sheet 9 of No. 1 was pasted together to form an electrostatic recording material E having a total thickness of about 110 μm (FIG. 4).
(B)). This electrostatic recording material E is applied to an electrostatic plotter 684.
After producing a mirror image I using 36GA (manufactured by Calcomp), the reinforcing material was removed together with the weak adhesive layer to obtain a displayed film F. Since this display film F is very thin, when it was attached to the cloth 10 having the one-sided adhesive 5 on it, a display object was obtained in which the texture of the cloth was not impaired (FIG. 4 (c)).

As a comparative example 4, this display is used as a support and 2 as a support.
A display having the same configuration as in Example 4 except that a 5 μm polyester film was used, and a fade meter (manufactured by Suga Test Instruments Co., Ltd.) using UV carbon as a light source was used for 600 hours (outdoor exposure for 3 years. When the light resistance test of (equivalent) was conducted,
As shown in Table 1, the display product of this example had a smaller color difference (ΔE) than the display product of Comparative Example 4, and had an effect of suppressing discoloration due to ultraviolet rays.

[0026]

As is apparent from the above examples, the electrostatic recording material of the present invention has a layer having a UV absorbing ability and weather resistance, and the support is made of a substantially transparent plastic film. Therefore, by forming a mirror image on the dielectric layer, a normal image can be seen from the side of the support, and the support functions as a cover film to protect the image as it is, so the cover film is attached and the support (paper) is peeled off. It is possible to obtain a display object very easily without such a complicated process.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of an electrostatic recording material of the present invention and a method of using the same.

FIG. 2 is a diagram showing another embodiment of the electrostatic recording material of the present invention and the method of using the same.

FIG. 3 is a diagram showing another embodiment of the electrostatic recording material of the present invention and the method of using the same.

FIG. 4 is a diagram showing another embodiment of the electrostatic recording material and the method of using the same according to the present invention.

FIG. 5 is a diagram illustrating a conventional method for manufacturing a display film.

[Explanation of symbols]

 1, 1 '・ ・ Plastic support 2 ・ ・ Ultraviolet absorption layer 3 ・ ・ ・ ・ Conductive layer 4 ・ ・ ・ ・ Dielectric layer 5 ・ ・ Adhesive Layer 6 ... Base material AE ... Electrostatic recording material I ... Mirror image (image)

Claims (2)

[Claims] 1. A conductive layer and a dielectric layer are sequentially provided on a support made of a substantially transparent plastic film,
An electrostatic recording material, wherein at least one of the support, the conductive layer and the dielectric layer or a layer provided separately from these layers has an ultraviolet absorbing ability. 2. A mirror image is formed on the dielectric layer of the electrostatic recording material according to claim 1 by electrostatic recording, and then the surface of the dielectric layer is attached to a substrate via an adhesive layer. A method for manufacturing a featured display object.