JPS5965851A - Electrostatic recording body and its manufacture - Google Patents

Abstract

PURPOSE:To obtain an electrostatic recording body with superior transparency, dimensional stability and mechanical strength by sticking a treating agent for providing electric conductivity to both sides of a film support having two sheets of paper adhered to both sides and by applying an electrostatic recording agent to the surface of one of the two sheets of paper. CONSTITUTION:Two sheets of paper are adhered to both sides of a plastic film support, and a treating agent for providing electric conductivity is stuck to both sides by 0.1-6g/m<2> and dried. An electrostatic recording agent is applied to or impregnated into the electrically conductive surface of one of the two sheets of paper by 3-10g/m<2>, and it is dried. The desired thickness of the film to be used is <=50mum when foldability, cost, etc. are considered. Paper having 10-40g/m<2> weight is preferably used as paper to be adhered to both sides of the film from the points of transparency, adhering work efficiency, etc. The desired treating agent for providing electric conductivity is a high molecular cationic salt having a quat. ammonium salt group such as polyvinylbenzyltrithylammonium chloride.

Description

[Detailed Description of the Invention] The present invention relates to a transparent electrostatic recording medium, and relates to an electrostatic recording medium that is suitable for extremely fast printers and plotters, which were used by samurai as drawing machines for designing and drafting. It is something.

In recent years, the use of electrostatic printer plotters as peripheral equipment for electronic computers has increased. Printer Glossota outputs print data and plot data on the same page at the same time, and with the development of Ink-7Ace and NotWare, which can be connected to multiple computers, the range of computer models that can be connected has expanded, and electronic Graphical outputs compatible with the high-speed, mass-processing capabilities of computers can now be easily obtained.

In such high-speed, high-resolution electrostatic printer plotters, an electrostatic latent image is formed on an electrostatic recording medium by signals from an electronic computer or other digital device, and characters and figures are output as visible images by toner development. However, in the case of designing and drawing, a large number of diazo copies are required using this as an original drawing, so it is required to use a transparent sheet as much as possible as an electrostatic recording medium.

Conventionally, electrostatic recording films based on plastic films and electrostatic recording papers based on transparent paper have been used as transparent sheets, but these have the following advantages and disadvantages. In other words, film-based electrostatic recording films have excellent transparency, dimensional stability, and mechanical strength, but they lack the foldability and erasability required for drawings, are expensive, and have poor texture. Not good either. On the other hand, transparent paper-based electrostatic recording paper is cheaper than film-based paper, has a good texture, and has good foldability and erasability, but it has problems with dimensional stability and mechanical strength, and its transparency It is also insufficient compared to film-based ones.

Also, both the film base and transparent paper base are shown in the drawing k Fr.
When folded, the folds tend to whiten, and the whitened folds are copied onto the diazocopy drawing, making the diazocopy drawing difficult to see.

The present invention eliminates all of these drawbacks and combines only the advantages of film-based and transparent paper-based electrostatic recording materials, resulting in high transparency, good dimensional stability, high mechanical strength, foldability, and erasable writing. The object of the present invention is to obtain a new soft recording material that has good properties and texture.

In the electrostatic recording medium according to the present invention, a plastic film with paper bonded to both sides, ie, a film layer stuck between the paper layers in the form of a sandwich, is used as the entire base. The conductive layer to be provided as an electrostatic recording medium is provided by using paper as a material. That is, a conductive treatment agent is applied to both sides of the paper, either by impregnation or by a combination of impregnation and coating, and furthermore, an electrostatic recording layer is coated on the surface of the conductive layer.

Figures 1 to 4 are fully enlarged cross-sectional views of the electrostatic recording material according to the present invention. When paper on both sides of the film is impregnated with a conductive treatment agent, Figure 3 shows that the paper on the recording layer side of the paper on both sides of the film is impregnated and coated, and the paper on the opposite side (
Figure 4 shows the case where paper on both sides of the film was impregnated and coated. In the figure, ■ indicates a plastic film as a support, ■ indicates a paper laminated to the film, ■ indicates a conductive layer, and ■+■ indicates that the entire paper was impregnated with the conductive treatment agent. Also, ■ represents an electrostatic recording layer, and ■ represents an adhesive f1 layer in which a film and paper are bonded together.

The plastic film used as a support in the present invention can be selected from various films such as polyester film, polypropylene film, polyvinyl chloride film, cellulose ester film, Holisal 7-on film, polyamide film, and polyimide film. . The thickness of the film is preferably 50 μm or less from the viewpoint of foldability and cost.

In the present invention, various types of paper such as high-quality paper, Japanese paper, and transparent paper can be used as the paper to be laminated on both sides of the film, but from the viewpoint of transparency and lamination workability,
/m, 2 or more and 40 jl/-, 2 or less basis weight is suitable.

As a method for laminating film and paper, dry lamination, wet lamination, and extrusion lamination are all possible. For dry and wet lamination, an adhesive is required. The adhesive that can be used is polyvinyl acetate. , polyacrylic acid ester type, styrene-butadiene copolymer type, polyester type, and polyincyanate type one-component or two-pack adhesives.In the case of extrusion lamination, adhesives are not required, but can be used. Films are now limited to polypropylene, polyesters, and polyamides.

In the present invention, after the film and paper are bonded together, coating with a conductive treatment agent and impregnation are carried out.

Conductive layer”j! As the agent, known polymeric cation salts having a quaternary ammonium base such as polyvinylbenzyltrimethylammonium chloride, polydimethyltrimethylammonium chloride, and polyN-methylvinylpyridinium chloride are particularly desired. , other 6th
It is also possible to use all ion-conducting conductive agents having grade amino groups, sulfonium groups, and phosphonium groups.

Further, it is also possible to use a polymer anion salt having a carboxyl group, sulfone group, sulfate group, phosphate group, etc. in the molecule, although the effect of imparting conductivity is somewhat inferior. It is also possible to mix or use a binder and other subcomponents with the conductive treatment agent. The treatment agent is dissolved in water or a solvent such as ketone, alcohol, or ester, alone or in a mixture, and used as a coating or impregnating solution. Adhesion of conductive treatment agent
+shi is 0.1-6y/m, 2 sides.

Conductive layer J with conductive treatment agent! After that, the recording layer is completely coated on the -10,000 side. The recording layer is made of enzyme-free materials such as enzyme-related vinyl resin, vinyl chloride resin, vinylidene chloride resin, acrylic resin, butyral resin, styrene resin,
It is a known product consisting of one or more types of silicone resin, epoxy resin, and various copolymer resins such as 2, or it is made entirely of a resin binder and contains an inorganic pigment or an organic pigment in the same amount or less. It is something.

%Iso pigments include kaolin, calcium carbonate, and amorphous silicic acid; organic pigments include polystyrene powder, synthetic resin powders such as polystyrene powder, starch powder, and cellulose powder; pigments such as these may be mixed. For example, you can use writing pads or plain paper. Coating of Record C4 1. i-Hiro~10yΔ2 is suitable.

The electrostatic recording material thus obtained has excellent dimensional stability and mechanical strength, and has good transparency, foldability, and erasability.
This eliminates the drawbacks of conventional electrostatic recording paper or film. It also has a better texture than traditional ones,
The whitening of the creases has also been significantly improved, making it groundbreakingly suitable as an electrostatic recording medium for high-speed printer plotters used as output drawing machines for design drawings.

Examples will be described below.

Example 1 Japanese paper 1 on both sides of polyester film (thickness 12μ crystal)
2, 5! /,, 22 Wet lamination was applied, and a 15% solution of the organic polymer conductive agent polyvinylbenzyltrimethylammonium chloride (manufactured by Dow Chemical Company, ECR-773) was coated on the paper on both sides using the Mayer bar coating method. , dry coating amount 6.0.F
/nL2 (both sides) conductive layers were applied.Furthermore, a copolymer resin containing acrylic resin as a main component was applied to the 10,000 conductive layers.
part (hereinafter referred to as the heavy weight part), 10 parts of calcium carbonate powder,
A recording layer composition consisting of 70 parts of ethyl acetate was coated using a full roll coater and dried to form a recording layer with a coating weight of 5.5 P/a2.

The thus obtained silent recording medium was printed using a full high-speed static Jr. printer (Versatic 12[]OA) and good drawings were obtained. I added the folds to this drawing and made a diazo copy. Transparent electrostatic recording paper and transparent electrostatic recording film with similar fold alignment have obvious crease whitening, and the creases are clearly copied in the diazocopy drawing, whereas the electrostatic recording of the present invention On the body, the creases were not copied.

Example 2 Natural tracing paper 40 y/m, 2'c on both sides of polyester film (thickness 12 μm, )
The conductive layer and the static recording layer were completely formed on both sides of the paper by dry lamination in the same manner as in Example 1.

Diazocopy was performed in the same manner as in Example 1, and good results were obtained.

EXAMPLE A thin paper of 20 V was laminated on both sides of a polyester film (thickness: 12μ9) for two sessions by dry lamination, and the thin paper layer on both sides was fully impregnated with an organic polymer conductive agent. A gold recording layer was formed.

Diazocopy was carried out in the same manner as in Example I+111, and a good result 'f1' was obtained.

Example 4 A record of impregnating a conductive treatment agent in the high-quality paper layer of the example filter, and coating this conductive layer with the same conductive treatment agent)d
was formed by coating.

Diazocopy was performed in the same manner as in Example 1, but good results were obtained.

Example 5 A conductive treatment agent was applied to both surfaces of the Example 2 after being impregnated with a conductive treatment agent, and a recording layer was coated on top of the conductive treatment agent.

Diazocopy was performed in the same manner as in Example 1, and good results were obtained.

[Brief explanation of the drawing]

Figures 1 to 4 show enlarged cross-sectional views of the static '11L recording medium of the present invention. When the paper on both sides of the film is coated with a conductive treatment agent, Figure 6 shows the case where the paper on the recording layer side of the paper on both sides of the film is completely impregnated and coated, and the opposite side (back side) is impregnated. Figure 4 shows the case where paper on both sides of the film was impregnated and coated. In the figure, (1) represents plastic film (2), paper (2), conductive layer (2), electrostatic recording layer (2), adhesive layer, and (2) +■ indicates that the paper is impregnated with a conductive treatment agent. Patent applicant: Sanyo Kokusaku Norub Co., Ltd. - Procedural amendment dated November 1, 1980, Mr. Kazuo Wakasugi, Commissioner of the Japan Patent Office1, Case indication patent application No. 176366, 1983, 2, Name of invention electrostatic recording Patent Applicant Address 1-4-5 Marunouchi, Chiyoda-ku, Tokyo Name (2)
34) Nasu, President and Director of Sanyo Kokusaku Pulp Co., Ltd.
Tadami 4, Agent 100 Address 234 Eiraku Building, 1-4-5 Marunouchi, Chiyoda-ku, Tokyo
Room telephone number 214-2861 (Main) 6, Claims column of the specification subject to amendment and Detailed description of the invention 1
箭Z We will correct the following points in the detailed statement of amendments. (1) The scope of claims from page 1, line 4 to page 2, line 8 will be amended as shown in the attached sheet. (2) On page 11, line 4, the phrase 1-A recording layer is corrected to read ``and a recording layer on top of it.'' 2. Claim 1 Paper that has been subjected to conductive treatment is attached to both sides of the film support, and an electrostatic recording layer is further provided on the surface of one of the conductive treated papers. An electrostatic recording material characterized by: 2 The amount of conductive treatment agent adhered to the paper bonded to both sides of the film support is 0.1 to 6 g/, n! 1. The electrostatic recording material according to claim 1, which is No. 1. 3. The electrostatic recording medium according to Patent No. 811, Patent No. 811, Paragraph 0, Paragraph 1 or Paragraph 2, wherein the electrostatic recording agent coated on the electrocardiographically treated paper surface is 3 to 10 g/m2. 4 After pasting paper on both sides of the film support, treat both sides with a conductive treatment agent in an amount of 1 to 6 g/m2,
A method for producing an electrostatic recording material, characterized in that after drying, an electrostatic recording agent is coated on the surface of one of the conductive treated papers at a rate of 3 to Log/ln, and dried. 6. A method for manufacturing an electrostatic recording medium according to claim 4, in which the conductive agent treatment is carried out by impregnation. 7. 5. The method for producing an electrostatic recording material according to claim 4, wherein the conductive agent treatment is performed by a combination of impregnation and coating.

Claims (1)

[Scope of Claims] 1 Paper that has been subjected to conductive treatment is pasted on both sides of the film support, and an electrostatic recording layer is further provided on the surface of one of the papers that has been treated with conductivity 7a. An electrostatic recording medium with all the characteristics of 2. The ffP electrorecording material according to claim 1, wherein the ridges of the 4D treatment material on the paper bonded to both sides of the film support are 0.1 to 6y/-2 in terms of screen. 6. The electrostatic recording material according to claim 1 or 2, wherein the electrostatic recording voltage applied to the surface of the paper that has been subjected to conductivity treatment is 6 to 10 V, . 4 After laminating paper and gold on both sides of the film support, treat both sides with a conductive treatment agent such that 2 amounts of Ll, 1 to 6yAn are attached, dry, and then apply a conductive treatment agent on the surface of the conductive treated paper of -10,000. A method for producing an electrostatic recording material, which is characterized by coating and drying a total of 6 to 10 recording agents. 5. The method for producing an electrostatic recording material according to claim 4, wherein the conductive agent treatment is performed by coating. 6. The method for producing an electrostatic recording material according to claim 4, wherein the conductive agent treatment is carried out by impregnation. Agent 7: A method for producing an electrostatic recording material according to claim 4, wherein the conductive treatment is carried out by a combination of impregnation and coating.