JPS6076348A - Electrode head - Google Patents

Abstract

PURPOSE:To enable high resolution recording by constituting an electrode head with a laminate formed alternately with an electroconductive layer and an insulative layer at a fixed pitch and an electro-insulator containing a hexagonal boron nitride. CONSTITUTION:A laminate composed of an electroconductive layer 5 such as copper leaf and an electro-insulative layer 6 such as epoxy resin and a cured molding 8 of mixed hexagonal boron nitride powder and thermosetting resin, e.g. ''Denka'' boron nitride powder of DENKI KAGAKU KOGYO K.K. and epoxy resin constitute an electrode head 7. In this case, an electroconductive layer 5 and an electroinsulative layer 6, laminated alternately at a fixed pitch, form a laminate. This laminate is molded in such a manner that its vertical thickness is constant in a laminated direction near the contact part of a recording element and also the pitch is less than double the afore-mentioned pitch.

Description

DETAILED DESCRIPTION OF THE INVENTION Field 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, with the spread of office automation, there has been a growing demand for recording devices that convert stains into visible images, so-called printers, and products with better performance and higher quality are required. Conventionally, recording devices of various types have been manufactured.

The electrode head already proposed by the present inventors will be described below with reference to the drawings. FIG. 1 is a perspective view of the writing part of the discharge breakdown recording device proposed by the present inventors.

Discharge breakdown recording is performed by grounding the vapor deposited aluminum layer of the discharge breakdown recording paper 11, which consists of a vapor deposited aluminum layer 12, a black layer 13, and a base paper layer 14, and contacting this vapor deposited aluminum layer with an electrode head to which a voltage is applied, in the direction of the arrow. Remove the vapor-deposited aluminum layer at the contact area by heating or electrical discharge destruction while moving it to the bottom 3.
,・,− Recording is performed by exposing the black layer of the background.

In this way, as an electrode head capable of high-resolution recording, a laminate in which electrically conductive layers 1 and electrically insulating layers 2 are alternately stacked at a constant pitch is used. ,
An electrode head 3 has been proposed in which a support 4 is provided on the back side of a laminate formed to have at most twice the pitch as described above 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. Ta.

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 includes electrical conductor layers and electrical insulator layers that are alternately stacked at a constant pitch to form a laminate, and the laminate has a thickness in the direction perpendicular to the lamination direction. is constant in the vicinity of the contact portion with the recording medium and is formed to have a pitch not more than twice the pitch, and an electrically insulating support, the support being at least hexagonal nitrided. It is characterized by containing boron, which allows the electrode head to maintain good print quality without damaging the recording medium by making contact between the support and the recording medium. This has been achieved.

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, reference numeral 7 indicates an electrode head of the present invention, which includes a laminate consisting of an electrically conductive layer, such as a copper foil 5, an electrically insulating layer, such as an epoxy resin 6, and a hexagonal nitride layer. Support 8 which is a molded body made by mixing boron powder and a thermosetting resin, such as Denka Kagaku Kogyo ■1 ψ Denka boron nitride powder and epoxy resin, and curing the mixture.
It is an electrode head consisting of. The operating principle has been explained in Conventional Example 5, so the explanation thereof will be omitted.

The support 8 of this example is a molded product made by mixing Denka Boron Night Wide powder manufactured by Denki Kagaku Kogyo ■ with grade GP hexagonal boron nitride powder and bisphenol/L/A type epoxy resin and curing the mixture. It contains 60 parts by weight of hexagonal boron nitride powder.

When this electrode head is attached to a recording device using discharge rupture recording paper and printed, there are characteristics such as numbers.

■ Excellent printing quality (stability of dot shape after printing 50,000 characters).

■ Can be printed on discharge destruction recording paper without scratches caused by the support.

■ Dust generated during recording is difficult to adhere to the support.

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

■High resolution recording is possible.

These characteristics are due to the excellent lubricity, heat resistance, electrical insulation, and wear resistance of hexagonal boron nitride.

Next, the content of hexagonal boron nitride powder was added to the support with the same structure as in the above example. 10. 20°30, 40
．． 50. 60. 70. Table 1 shows the results of evaluation by printing on discharge breakdown recording paper as in the above example using a V head using molded bodies whose weight coefficients were changed to 80.90°96.

Below Margin r Vane In Table 1, printing quality is an evaluation of the stability of the dot shape after 60,000 characters have been printed. Dust resistance is an evaluation of the amount of dust on the electrical conductor that adheres to the tip of the support after 50,000 characters have been printed.

Hardness evaluates whether printing can be done without damaging the electrical discharge rupture recording paper during printing. Flame retardancy was evaluated based on UL Standard 94 using a test piece with a thickness of 1/16 inch. Processability refers to the ease with which a molded article can be made and the ease with which it can be processed after curing.

As is clear from Table 1, the hexagonal boron nitride content is 1
If it exceeds 0% by weight, the flame retardance is poor, and the support is destroyed near the electrical conductor layer due to the heat generated by the discharge, and dust generated during recording accumulates there, damaging the insulation between the electrodes. Print quality deteriorates.

When the content of hexagonal boron nitride powder exceeded 95% by weight, it was impossible to make a compact and it was not possible to evaluate it as an electric head. A molded article having a weight of 90% to 90% by weight can be used as a support, and a molded product having a weight of 40 to 80% by weight is more preferable.

FIG. 3 is a perspective view of an electric head according to another embodiment of the present invention. In FIG. 3, 6 is an electric conductor layer, 6 is an electric insulator layer, 9 and 10 is a sintered body of hexagonal boron nitride, for example, a Denka boron nitride sintered body manufactured by Denki Kagaku Kogyo ■.In this example, a grade HeO type of Denka poron nitride sintered body manufactured by Denki Kagaku Kogyo ■ is used. It was used.

By causing discharge breakdown in this electrode head as in the first embodiment, it is possible to obtain the effect that dust during recording does not adhere to surfaces other than the contact surface with the recording medium.

Next, the content of hexagonal boron nitride was set to 65.70°75.
Table 2 shows the results of evaluation by printing on discharge rupture recording paper in the same manner as in the above examples using sintered bodies with varying amounts of 80, 85, 90, 95, 99, and 100% by weight as supports.

In Table 2, printing quality, resistance to dust, hardness, flame retardancy, and processability are evaluated using the same evaluation methods as in Table 1. As is clear from Table 2, when the content of hexagonal boron nitride was 65% by weight, the discharge breakdown recording paper 2 was damaged during printing, resulting in poor printing quality. The content of hexagonal boron nitride is 70% by weight ~ 1
A certain effect was obtained with the feed material of 00% by weight, but it is more preferable to use
An electrode head using a 99% weight sintered body as a support is good.

2. Fig. 2 describes an example using a molded body of hexagonal boron nitride and a thermosetting resin, and Fig. 3 describes an example using a sintered body of hexagonal boron nitride. The compact may be used as a support in the molded body shown in FIG.

In the following embodiments, the electrode head of a recording device using discharge rupture recording paper has been described, but it can be used as an electrode head of other recording devices.

2. Explanation of Effects of the Invention As is clear, the present invention comprises forming a laminate by alternately laminating electrical conductor layers and electrical insulating layers at a constant pitch, A laminate formed such that the thickness in the direction perpendicular to the lamination direction is constant near the contact portion with the recording medium and is not more than twice the pitch;
Since the support is an electrical insulator and contains at least hexagonal boron nitride, the recording medium will not be damaged even if the support and the recording medium come into contact during printing. It has the effect of preventing dust generated during recording from adhering to the support, and this effect results in high-resolution, stable quality printing.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an electrode head (T head) already proposed by the present inventors, Fig. 2 is a perspective view of an electrode head in one embodiment of the present invention, and Fig. 3 is a perspective view of an electrode head in another embodiment of the present invention. It is a perspective view of an electrode head. 1... Electric conductor layer, 2... Electric insulator layer, 3... Electrode head, 4... Support, 6... Electrical conductor layer, 6... Electrical insulator layer, 7... Electrode head, 8...
...Support, 9...Support, 10...
Support, 11... Discharge breakdown recording paper, 12...
... Vapor-deposited aluminum layer, 13... Black layer, 14.
...Base paper layer. Name of agent: Patent attorney Toshio Nakao and 1 other person
ゞ T＞ Objective- Hi-he no Peng Castle

Claims (1)

[Scope of Claims] (1) A laminate is formed by alternately laminating electrical conductor layers and electrical insulators 6 at a constant pitch, and the thickness of the laminate in the direction perpendicular to the lamination direction is a recording material. It consists of a laminate formed to have a constant pitch near the contact area and not more than twice the pitch, and an electrically insulating support, and the support includes at least hexagonal boron nitride. An electrode head characterized by containing: (b) The support is made of at least hexagonal boron nitride and a thermosetting resin, and the hexagonal boron nitride is contained in an amount of 20% to 90% by weight.
2. The electrode head according to claim 1, wherein the electrode head is a molded body containing a weight coefficient. (3) The electrode spatula 21°-sheet according to claim 1, wherein the support is a sintered body containing at least 7% by weight of hexagonal boron nitride.