JPS6079959A - Electrode head - Google Patents

Abstract

PURPOSE:To provide an electrode head having a support never damaging a recording body by constructing the support of the electrode made up of the laminate of a conductor layer and an insulator layer of a molding body of a thermosetting resin, hexagonal boron nitride and talc. CONSTITUTION:An electrode head 7 is made up of a laminate in which a conductor layer 5 and an electric insulator layer 6 are laminated alternately at a fixed pitch and molded so that the width of the end thereof, the portion contacting a recording body, namely, the thickness of the portion vertical to the direction of lamination is constantly less than doubles said pitch and supports 8-10 as electric insulator. The supports 8-10 are composed of a molding of at least a thermosetting resin, hexagonal boron nitride and talc. The molding preferably contains 5wt% or more of hexagonal boron nitride while the total amount of hexagonal boron nitride and talc ranges 25-90wt%.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrode head for recording electrical signals on a recording medium.

Conventional configurations and their problems In recent years, there has been an increasing demand for recording devices that convert electrical signals into visible images using office automation lights, so-called printers, and higher quality performance is required. Since then, various types of recording devices have been created.

The electrode head JJ, which the present inventors have already proposed, will be described below with reference to the drawings. FIG. 1 is a perspective view of the inlet/outlet h portion of the discharge breakdown recording device proposed by the present inventors. The discharge breakdown record is the vapor-deposited aluminum layer 12. black layer 13
．． The vapor-deposited aluminum layer of the discharge breakdown recording paper 11 consisting of the base paper layer 14 is grounded, and the electrode head applying a voltage to the vapor-deposited aluminum layer is moved in the direction of the arrow while contacting the vapor-deposited aluminum layer at the contact portion. The black layer on the r background is exposed by removing it by heating or discharge destruction to perform recording.

In this way, high-resolution recording is possible with the electrode head 3-l Snow 4N-+AkR1LMOfIN, 1816km Ij
, -R J-f, -, -, - are stacked alternately with a constant pinch, and the thickness in the direction perpendicular to the stacking direction is constant in the vicinity of the contact portion with the recording medium, and An electrode gutter 3 has been proposed which is formed to have a pitch less than twice the pitch and is provided with a support 8 on the side opposite to the moving direction of the laminate to prevent the laminate from folding. Conventionally, alumina substrates, which are electrical insulators and have good thermal conductivity, have been used as supports, but alumina substrates are hard and have the disadvantage of damaging the recording medium if they come into contact with each other. there were.

OBJECTS OF THE INVENTION An object of the present invention is to provide an electrode head that is equipped with a support that does not damage a recording medium and that enables high-resolution recording.

Structure of the Invention The electrode head of the present invention forms a laminate by alternately laminating electrical conductor layers and electrical insulator layers with a certain pinch, and the thickness of the laminate in the direction perpendicular to the lamination direction is It consists of a laminate formed to have a constant pitch near the contact portion with the recording medium and not more than twice the pitch, and a support made of an electrical insulator, and the support is made of at least a thermosetting resin. It is characterized by being a molded body made of hexagonal boron nitride and talc, which makes it possible to maintain good print quality without damaging the recording medium due to contact between the support and the recording medium. We have realized an electrode head that does this.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is a perspective view of an electrode head in one embodiment of the present invention. In FIG. 2, numeral 7 indicates an electrode head of the present invention, which includes a laminate consisting of an electrically conductive layer, such as copper foil 6, an electrically insulating layer, such as epoxy resin 6, talc and hexagonal nitride. Boron powder and thermosetting resin For example, 1. A support that is a molded product made by mixing and curing talc powder manufactured by Hontalc Co., Ltd., Denka boron nitride powder manufactured by Denki Kagaku Kogyo Co., Ltd., and an epoxy resin. This is an electrode head consisting of 8. The principle of operation has been explained in the conventional example, so a description thereof will be omitted.

The support 8 in this example is manufactured by Nippon Talc Co., Ltd. and has a purity of 99%.
It is a molded product made by mixing the above talc powder, Denka boron nitride powder manufactured by Denki Kagaku Kogyo Co., Ltd., grade () P hexagonal boron nitride powder, and bisphenol A type epoxy resin, and curing the mixture. It contains 20% by weight of boron nitride powder and 30% by weight of talc powder.

This electrode head is attached to a recording device using discharge rupture recording paper, and there is a characteristic similar to that when printing is performed.

■Printing quality (stability of dot shape after 60,000 characters printed) is excellent.

■Can print on discharge destruction recording paper without damaging it with the support.

■It is difficult for dust generated during recording to adhere to the support.

■The support does not deteriorate due to heat during recording.

■High resolution recording is possible.

Nirera's characteristics are lubricity, heat resistance, and electrical insulation.

This is due to the use of a molded body in which the crystallites are mixed with talc, which has monomorphism and is inexpensive IgP+, although its characteristics are slightly inferior.

Next, with the same configuration as in the above example, the contents of boron nitride and talc in the support were changed and evaluated by printing on discharge breakdown recording paper, and the optimum content was inspected and evaluated. The results are shown in Tables 1 to 3.

Table 1 Hexagonal boron nitride content and evaluation as an electrode head * h-BN/6Jj product nitride ho-shi (, Table 2 Talc content and evaluation as an electrode head Table 3 Containment of hexagonal boron nitride and talc The amount and Table 1 are when talc is not included.
Table 2 shows evaluation results obtained by varying the contents of hexagonal boron nitride and talc when no hexagonal boron nitride was contained.

In Tables 1 and 2, print quality is 5 /j 'E
The stability of the dot shape after character printing was evaluated.

The resistance to dust is 4. after printing 50,000 characters. '1 Evaluation of the amount of electrical conductor dust attached to the tip of the body. Hardness is the d-value, which measures whether or not it is possible to print without damaging the electrical discharge rupture recording paper during printing. Flame retardancy is based on UL Standard 94, and the thickness of the test piece is evaluated in 'Air inches'. Processability refers to the ease of making a molded body and the ease of cutting after curing. As is clear from Tables 1 and 2, in the case of hexagonal boron nitride, the effect was obtained from 20% by weight of t:L, and in the case of talc, the effect was obtained from 30% by weight.

Although hexagonal boron nitride has excellent q and mono properties as described above, it is very expensive. On the other hand, talc d.

Although it is inexpensive, it has slightly inferior characteristics to hexagonal boron nitride. Therefore, an experiment was conducted to create a support that has satisfactory properties and cost by combining talc and hexagonal boron nitride. The results are shown in Table 3. Table 3 shows the overall evaluation obtained by evaluating the same items as in Tables 1 and 2. If the total amount of hexagonal boron nitride and talc is less than 20%, the support will be destroyed near the electrical conductor layer due to the heat generated by the discharge, and dust generated during recording will accumulate there, resulting in poor insulation between the electrodes. This will cause the print quality to deteriorate. Furthermore, if the total amount of hexagonal boron nitride and talc was 96% by weight or more, a molded body could not be made and could not be evaluated as an electrode head. From the above, it is preferable to use a molded body containing 26 to 90% by weight of hexagonal boron nitride and talc as a support. However, when the hexagonal boron nitride content is less than 5% and the hexagonal boron nitride and talc mixture is 26 to 90% by weight, the hexagonal boron nitride is superior. characteristics that are not present.

Therefore, it is preferable to use a molded body containing hexagonal boron nitride in a total amount of at least 26 to 90% by weight of pentapolymer as the support.

FIG. 3 is a perspective view of an electrode head according to another embodiment of the present invention. In Fig. 3, 6r↓ is an electric layer, 6 is an electric insulator layer, 9 and 101rj talc, hexagonal boron nitride, thermosetting resin, 11 talc powder books manufactured by Talc Co., Ltd. and electric Chemistry +1 This is a molded product made by mixing Denkaboron nitride powder made by Nai (Ii) with Ebogi/thread resin and curing it. 1. When this electrode head is used to print on discharge recording paper as in the above example, the characteristics 1 and II are printed as in the example described above, and the bond layer body is sandwiched from the front and back by the support. This has the effect of preventing dirt from being deposited on surfaces other than those in contact with the recording medium.

In addition, in the above examples, the discharge destruction record +? Although the electrode head of a recording device using iK has been described in [7-C], it can be used as an electrode head of other recording devices. However, it can be easily inferred from the present invention that hexagonal boron nitride or talc-containing materials can be used as supports for electrode heads.

As is clear from the description of the effects of the invention, the present invention is to form a laminate by alternately stacking electrical conductor layers and electrical insulator layers in a fixed pitcher, and to stack the laminate in a direction perpendicular to the stacking direction. It consists of a laminate formed so that the thickness in the direction of contact with the recording medium is constant in the vicinity of the contact part with the recording medium and is not more than twice the thickness of the pinch, and a support which is an electrical insulator. is a molded body made of at least a hardening resin, hexagonal boron nitride, and targ, so even if the support and the recording medium come into contact during printing, the recording medium can be printed without being damaged, and the recording This has the effect of preventing dust that is sometimes generated from adhering to the support, and this effect allows printing of high resolution and stable quality to be obtained. Furthermore, by mixing hexagonal boron nitride and talc, an inexpensive electrode head can be obtained while maintaining the excellent properties of hexagonal boron nitride.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an electric eve node already proposed by the present inventors, FIG. 2 is a perspective view of an electrode head in an embodiment of the present invention, and FIG. 3 is a perspective view of an electrode head in another practical example of the present invention. FIG. 1...Electrical conductor layer, 2...-Electrical insulator layer, 3...Electrode head, 4-...-Support, 6
・・Electrical conductor layer, 6・Electrical insulator layer, 7・−・
Electrode head, 8...Support, 9-...Support, 1
o...-Support, 11--Discharge destruction recording paper, 12.
Vapor-deposited aluminum layer, 13...black layer, 14...base paper layer.

Claims (2)

[Claims] (1) Electric conductor layers and electrical insulator layers are alternately laminated with a certain pinch to form a laminate, and the thickness of the laminate in the direction perpendicular to the lamination direction is the contact portion with the recording medium. , and an electrically insulating support, the support comprising at least a thermosetting resin and hexagonal boron nitride. An electrode head characterized by being a molded body made of talc. (2) The support contains at least 6% by weight of hexagonal boron nitride.
The electrode head according to claim 1, wherein the electrode head is a molded article containing the above-mentioned hexagonal boron nitride and talc in a total amount of 25 to 90% by weight.