JPH02106760A - Electrostatic recording body - Google Patents

Abstract

PURPOSE:To sharply record a desired design directly on cloth and to use it as the designing cloth as it is by coating a waterproof conductive layer formed at least on one side of the cloth with a dielectric layer. CONSTITUTION:At least one side of the cloth 1 is coated with the waterproof conductive layer 2, and the dielectric layer 3 is formed on the layer 2. When the cloth to be used has a rough surface, such as polyester or nylon, an undercoat is formed to smooth the surface, and the conductive coating material comprising an electron-conductive type conductive powder, a resin soluble in an organic solvent, and a hardening agent is used. The electrostatic recording layer is obtained by coating the dried conductive layer 2 with a coating material obtained by mixing and dispersing a dielectric insulating resin and a pigment and drying it, thus permitting a sharp waterproof record to be obtained by recording by a color electrostatic plotter, and the obtained cloth to be used as the designing cloth as it is.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to an electrostatic recording medium, and particularly relates to sb, especially CG (
The present invention relates to an electrostatic recording medium that can directly record designs of clothing, umbrellas, bags, etc. using computer graphics technology using an electrostatic grotter.

(Prior art) An electrostatic recording medium is a support that has a conductive layer on at least one side and a dielectric layer on top of it, and a voltage is applied to the surface of the dielectric layer from a recording electrode. After forming an electrostatic latent image and developing it with toner (colored powder or liquid developer), heat,
The toner is fixed by pressure, drying, etc. to obtain a record. It has the advantage of being able to record at high speed and high resolution, and has been widely used in facsimiles and printers. Recently, in addition to monochrome recording using black toner, latent image formation, development, and fixing processes have been expanded to include black, cyan, magenta, and
It is carried out for each color of yellow, and is also used to obtain full-color IC records.

On the other hand, CG (Computer Graph) uses computers and scanners to design poster catalogs, leaflets, wrapping paper, clothing, umbrellas, bags, etc.
ics) technology has developed.

When making a hard copy of a design, it must accurately represent the color, clarity, and size intended by the author. Color electrostatic glotters can be used as one hard copy technology that satisfies this requirement.

Especially when creating large posters or designs, heat transfer,
If you try to obtain a record of B-3 size or higher using inkjet or electrophotographic methods, there are many technical problems and it will be very expensive, but if you use a color Seiden plotter, you can easily print to A-0 size or higher. There is an advantage of being able to obtain more than one record. In addition, when designing fabrics such as clothing, umbrellas, and bags, conventional electrostatic recording materials are supported by paper, synthetic paper, film, etc., so they can be used only to confirm the design. In order to create a design on cloth, special means were required, such as looking at the design and changing the color of the threads during weaving, or using screen printing plates.

(Problems to be Solved by the Invention) An object of the present invention is to provide an electrostatic recording material that can directly and clearly record a desired design without using special means such as screen printing, and can be used as is as a fabric. The purpose is to

(Means for Solving the Problems) The present inventors provided a water-resistant conductive layer on at least one side of the fabric, provided a dielectric layer on the conductive layer, and thereby directly recorded a desired design and left it as it was. It has been found that it is possible to obtain an electrostatic recording material that can be used as a fabric.

Conventionally, electrostatic recording materials have been used in facsimile machines and printers, and because they have not been used for the purposes described above, there have been no electrostatic recording materials using fabric as a support.

Fabric, like paper and film, can be supplied in rolled form, so electrostatic recording materials can be manufactured using conventional coaters and printing machines. Special care must be taken as the smoothness is poor and the penetration of paint is high.

Fabrics used in the present invention include polyester, nylon,
There are fabrics woven from synthetic fibers such as rayon, vinylon, acrylic, and acetate, vegetable fibers such as cotton and linen, and animal fibers such as silk and wool, either singly or in combination.For example,
It is necessary to obtain a smooth surface by using fine threads and densely weaving, or by providing an undercoat layer if the surface of the fabric is rough.

The undercoat layer is made of water-resistant adhesive such as acrylic ester resin, vinyl acetate-acrylic ester copolymer resin, styrene-butadiene copolymer resin, urethane resin, vinyl chloride resin, vinylidene chloride resin, or emulsion of these resins. It can be obtained by applying a paint alone or mixed with an inorganic pigment such as calcium carbonate or clay.

In addition, these resins can be used alone or mixed with pigments, melted,
It may be kneaded to form a film with a thickness of 5 to 100 μm and laminated to cloth. Furthermore, depending on the conductive treatment method, it is necessary to use a surface-treated fabric. For example, when performing conductive treatment on the surface of fabric by coating or printing, waterproofing with vinyl resin, urethane resin, etc., or fluorinated fatty acid amide or methyl hydrogen is applied to prevent penetration of paint or ink. It is also effective to use fabric treated with water repellent treatment such as empolysiloxane.

The thickness of the fabric needs to be determined depending on the use, but it is
A thickness of approximately 400 μm to 400 μm can be used. The conductive paint must be water resistant because it is necessary to impart water resistance to the electrostatic recording medium.

As a conductive agent, the volume electrical resistance value (hereinafter abbreviated as specific resistance) measured by press molding at a pressure of 150y/m" is 10.
Conductive powder of 5 to 103 Ω (7), such as metal oxide powder such as zinc oxide doped with aluminum, stannic oxide doped with antimony, metal powder such as silver powder, cuprous iodide powder, etc. electron conductive type conductive powder and organic solvent soluble resin such as acrylic ester resin, vinyl chloride-vinyl acetate copolymer resin, urethane resin, styrene-acrylic ester copolymer resin, etc., or thermosetting resin. For example, a conductive paint made of a resin such as melamine resin, epoxy resin, or phenol resin and a curing agent can be used.

The coating amount of conductive paint after drying is [L5 to 301/m2]
The surface electrical resistance value is 105 to 108.
It is necessary to adjust it so that it is Ω.

In addition, plasticizers such as phthalate esters and quaternary ammonium salt type softeners can be added as necessary to ensure that the flexibility and texture of the fabric are not impaired during conductive treatment. It is.

The coating method involves dipping the fabric in conductive paint.
An impregnating machine can be used conveniently, and when applying conductive treatment to one or both sides of the fabric, a normal coater or printing machine can be used, such as a one-way Meyer bar type, a gravure roll type, a five-roll type, a blade type, etc. can. After conductive treatment, in order to eliminate wrinkles and surface roughness of the fabric, smoothing treatment is performed using gloss calender, super calender, machine calender, etc. as necessary.

Further, a thermoplastic resin such as ethylene resin, propylene resin, ethylene-vinyl acetate copolymer resin, acrylic ester resin, etc. and the gold JpAf1! An electrically conductive support can also be obtained by melt-kneading compound powder or metal powder, extruding it into a film, and applying it to the surface of fabric.

A dielectric layer is formed by coating a dielectric layer paint on the conductive layer of the conductive support and drying it. The dielectric layer paint is obtained by mixing and dispersing an insulating dielectric layer resin and a pigment. As the dielectric layer resin, most resins can be used as long as the volume electric resistance value is 10120 m or more, such as vinyl acetate resin, vinyl chloride resin, vinyl chloride-vinyl acetate copolymer resin, acrylic ester resin, Butyral resin, polyester resin, nitrocellulose resin, styrene resin, styrene-acrylic copolymer resin, etc. can be used.

Inorganic and organic white pigments can be used as the pigments in the dielectric layer, such as inorganic pigments such as calcium carbonate, clay, fired clay, lithopon, titanium oxide, zinc oxide, and aluminum hydroxide, as well as acrylic resin beads and styrene resin beads. , urea resin beads, benzoguanamine resin beads, and other organic pigments can be used. The dielectric layer paint has a dielectric layer resin/pigment ratio of 9 from the viewpoint of recording characteristics and whiteness of the recording medium.
It is desirable to mix them in a ratio of 0/10 to 50,150.

In addition, in order to improve visual whiteness, for dielectric layer paint,
A fluorescent dye can also be added at α5 to 5%. The obtained dielectric layer paint can be coated on the conductive layer by a normal coating method such as a one-way Meyer bar method, a gravure roll method, a five-roll method, a blade method, etc., and the coating amount after drying is 2 to 7 f/2.
m'' to obtain an electrostatic recording medium.

FIG. 1 shows a structure in which a water-resistant conductive paint layer 2 is applied to only one side of the fabric 1, and FIG. 2 shows a structure in which a dielectric layer 3 is provided on one side of the conductive layer after a water-resistant conductive paint layer 2 is applied to both sides. FIG. 3 shows a structure in which a waterproof conductive layer 2 and a dielectric layer 5 are sequentially provided after an undercoat *4 is applied to one side of the fabric. Further, FIG. 4 shows a structure in which a water-resistant conductive layer 2 and a dielectric layer 3 are sequentially provided on a fabric 1 provided with a waterproof or water-repellent film 5. Furthermore, FIG. 5 shows a structure in which a dielectric layer 5 is provided on a conductive support 6 obtained by dipping a fabric in a conductive paint, squeezing it, and drying it. This figure shows a structure in which an undercoat layer 4 is provided on one side of the conductive support 6 obtained by the above process, and then a dielectric layer 5 is provided thereon.

(Examples) Hereinafter, the present invention will be explained in more detail with reference to Examples. Parts in the examples represent parts by weight.

Example 1 A polyester fabric having a thickness of 120 μm was subjected to a water repellent treatment using an acrylate ester resin and a fluorinated fatty acid amide, and then a smoothing treatment was performed using a cross calender. Zinc oxide doped with aluminum to make it conductive (FX-8
Specific resistance 1.5x+O” Ω・Saw Honjo Chemical Co., Ltd. M
)1o.

part, urethane wood 1] 1 (CR%l5VON NT-1
5050% solids (manufactured by Dainippon Ink & Chemicals @)) 40
After applying a conductive paint consisting of 2 parts, 1 part of aminoplast curing agent, and 180 parts of toluene using a 5-slot roll coater so that the coated amount after drying was 1597 m2,
A conductive support was obtained by smoothing with a cross calender. Styrene-acrylic acid ester tree 11i (FL-
276 solid content 40% Inu Nippon Ink Chemical Industry Co., Ltd.)
100 parts, calcium carbonate (N3-400 average light dye (Ubitex OB Ciba Geigy) [15 parts,
The amount of dielectric layer paint made of 90 parts of toluene applied on the conductive layer after drying! It was coated so that it was LO of/m”.

The resulting electrostatic recording material was conditioned for 2 hours at 25° C. and 45% RH, and then color recording was performed using a color electrostatic glotter (manufactured by Seiko Electronics Industries).

A clear full-color record was obtained, and there was no decrease in density or peeling of the record even when immersed in water.

Example 2 A nylon fabric with a thickness of 100 μm was immersed in a 10% acrylic acid ester resin solution, waterproofed, and then smoothed. On one side of the fabric, antimony-doped stannic oxide (W-1 resistivity 5Ω・(1)
100 parts manufactured by Mitsubishi Metal Industries, Ltd., polyester resin (
A conductive paint consisting of 25 parts of Vylon 500 (manufactured by Toyobo Co., Ltd.) and 1 part of incyanate curing agent was applied so that the coating amount after drying was 10 f/m, and then smoothed with a cross calender. 100 parts of polyester resin (Vylon 21AS solid content 30% manufactured by Toyobo Co., Ltd.), calcium carbonate (Whiten 5S) were treated to form a conductive layer.
B (red) fi diameter 1.25 μm (manufactured by Shiraishi Kogyo Co., Ltd.) 10
0 parts, silica (thyroid 161 average particle size 7.OA
m Fuji Devine/manufactured by Kagaku Co., Ltd.) 2 parts, toluene 5
A dielectric layer paint consisting of 6 parts was applied onto the conductive layer so that the coating amount after drying was 17 m2 of AO.

Recording was performed on the obtained electrostatic recording medium using a color electrostatic plotter in the same manner as in Example 1.

A clear full-color record was obtained, and there was no decrease in density or peeling of the record even when immersed in water.

Example 5 Zinc oxide (25-K resistivity 1
．． 2X10”Ω・Rust (manufactured by Hakusui Chemical Industry Co., Ltd.) 100 parts, self-crosslinking acrylic resin emulsion (ET-700)
140% solid content Nippon Kayaku Co., Ltd.) 50 parts, water 25
After dipping into a conductive paint consisting of 0 parts and squeezing, 160 parts
Crosslinking was performed by heating at ℃ for 3 minutes. After smoothing with a super calender, a dielectric layer paint was applied to this side in the same manner as in Example 1 to obtain an electrostatic recording material.

When recording was carried out using a color electrostatic glotter in the same manner as in Example 1, clear full-color recording was obtained, and the recording was good with no decrease in density or peeling of the recording even when immersed in water.

Example 4 100 parts of antimony-doped stannic oxide (W-1 resistivity 5Ω, Kushi, manufactured by Mitsubishi Metal Industries, Ltd.) and 150 parts of vinyl chloride resin (Zeon + O + Ep, manufactured by Nippon Zeon Co., Ltd.)
50 parts of plasticizer (DOP) were heated and kneaded at 160°C,
At the same time, it was extruded into a film with a thickness of 50 μm and a thickness of 2
This was laminated onto a 50 μm polyester fabric to obtain a conductive support. A dielectric layer paint was applied on the conductive layer in the same manner as in Example 1 to obtain an electrostatic recording material.

When recording was carried out using a color electrostatic plotter in the same manner as in Example 1, clear full-color recording was obtained, and the recording was good with no decrease in density or peeling of the recording even when immersed in water.

Comparative Example 1.2 Commercially available electrostatic recording paper PP-2!10 (manufactured by Tamago Paper Co., Ltd., Comparative Example 1) and Ni-555M5 (manufactured by Kanzaki Rigami Co., Ltd., Comparative Example 2) were used in Example 1 Similarly, when recording was performed using a color electrostatic plotter, clear full-color recordings were obtained, but when immersed in water, the dielectric layer peeled off and the base paper was torn, making it impractical.

(Effects of the Invention) According to the present invention, it is possible to provide an electrostatic recording material that provides clear recording when recorded with a color electrostatic plotter, has increased water resistance, and can be used as it is as a design fabric.

[Brief explanation of the drawing]

Figure 1 shows an electrostatic recording material of the present invention in which a water-resistant paint layer is provided on one side of the fabric and a dielectric paint layer is provided thereon, and Figure 2 shows an electrostatic recording material in which a water-resistant paint layer is provided on both sides of the fabric. FIG. 3 is a diagram showing an electrostatic recording material of the present invention, in which an undercoat layer 4 is coated on one side of a fabric, and then a water-resistant conductive layer and a dielectric layer are sequentially provided. The figure shows an electrostatic recording material of the present invention in which a water-resistant conductive layer and a dielectric layer are sequentially provided on a cloth coated with a waterproof or water-repellent membrane, and Figure 5 shows a cloth coated with a conductive paint. FIG. 6 shows an electrostatic recording medium of the present invention in which a dielectric layer is provided on a fabric dipped in a conductive paint. 1...Fabric, 2...Water resistant conductive paint, 3...
...Dielectric layer, 4.Undercoat layer, 5.--Waterproof or water-repellent layer, 6.--Conductive support

Claims (1)

[Claims] An electrostatic recording material characterized in that a water-resistant conductive layer is provided on at least one side of a fabric, and a dielectric layer is provided on the conductive layer.