JPS6184285A - Transfer mask sheet - Google Patents

Abstract

PURPOSE:To ensure favorable transferrability and enable printing with high quality, by specifying the surface smoothness and surface resistance of a vapor- deposited metallic layer. CONSTITUTION:A surface roughening layer and a vapor-deposited metallic layer 303 are sequentially provided on a base 305 to produce the transfer mask sheet 302, in which the metallic layer 303 has a surface smoothness as measured by the Bekk system of 5-150sec and a surface resistance as measured by a metallic film resistance test according to JIS C-2316.835 of 0.3-2.6OMEGA. For example, a dispersed liquid is applied to a base 305 consisting of a polyester film having a thickness of 25mum to provide a surface roughening layer having a thickness of about 8mum. Further, vacuum deposition is conducted to provide thereon a vapor-deposited aluminum layer 303 having a thickness of 200, 400 or 600Angstrom , thereby obtaining the transfer mask sheet 302.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a transfer mask sheet used in facsimile machines, printers, etc. that convert electrical signals into visible images and record them.

2. Description of the Prior Art Structures and Their Problems In recent years, with the development of office automation, various terminals have been required. Among these, recording devices that convert electrical signals into visible images, so-called printers, are in great demand, but there are few that are satisfactory in terms of performance. Among various recording devices, discharge breakdown recording devices are generally widely used because they are excellent in high speed and record preservation.

The discharge breakdown recording device has a vapor-deposited aluminum layer of a discharge breakdown recording paper consisting of a vapor-deposited aluminum layer, a black layer, and a base paper layer, and an electrode to which a voltage is applied is brought into contact with the vapor-deposited aluminum layer, and the contact portion is heated or discharged. The vapor-deposited aluminum is removed by destruction, exposing the underlying black layer for printing. Therefore, in order to write well, use a wire (as shown in Figure 1a).
A write electrode is made to expose the electrode needle (11) and ensure contact. 12 is a fixed part, and 13 is a lead. If the electrode needles are not exposed (protruding) as shown in Figure 1, the area around the electrode needles 14 will be destroyed, and especially the dust generated during recording will damage the insulation between the electrode needles, resulting in poor quality. I can't write.

Therefore, it was necessary to make the electrode needle protrude and to make it strong, so it was necessary to use something thick and hard. Therefore, it was not possible to increase the resolution.

In order to solve these problems, an electrode head in which the electrode needle is fixed with a sintered body of hexagonal boron nitride has been proposed. When this electrode head was used to print on electrical discharge rupture paper whose roughened layer contained carbon, high quality printing was continuously obtained. However, when printing was performed on a plastic sheet (hereinafter referred to as a transfer mask sheet) that did not contain carbon in the roughened layer and had good light transmittance as a support, good printing could not be obtained. This is thought to be due to differences in the surface smoothness of the paper and plastic supports, the permeability of the binder, and the presence or absence of carbon in the roughened layer, but conventional transfer mask sheets have a high resolution. This seems to be due to the lack of appropriate support for image printing.

FIG. 2 shows a cross-sectional view of the transfer mask sheet.

202, aluminum vapor deposition layer, 203, roughened layer,
204 is a support.

When high-resolution printing is realized on this transfer mask sheet by electric discharge, copying using a flash becomes possible, as shown in FIG. In FIG. 3, 301 is an image receiving paper, 302 is a transfer mask sheet, 306 is a heat-melting ink sheet, 3o7 is a support for the ink sheet, 308 is a heat-melting ink, 309 is a flash, and 310 is a heat-melting ink sheet. This is the ink after transfer.

Here, as with conventional discharge recording paper, holes are first made in the aluminum vapor deposited layer 303 of the transfer mask sheet by electric discharge from electrode needles, and then the thermofusible ink is heated and melted by a flash of light passing through the holes. The image is then transferred onto image receiving paper 301.

However, a transfer mask sheet with good print quality has not been obtained.

OBJECTS OF THE INVENTION An object of the present invention is to provide a transfer mask sheet that has good transferability and enables high-quality printing.

Structure of the Invention The transfer mask sheet of the present invention is a transfer mask sheet in which a roughened layer and a metal vapor deposited layer are sequentially provided on a support, and the surface smoothness of the metal vapor deposited layer is determined by Beck method measurement. 6～
160 seconds and surface resistance is JIS standard C-2316.8
36 metal film resistance test is in the range of 0.3 to 2.6 Ω.This makes it possible to realize a transfer mask sheet that can print with high resolution, and by transferring this, high quality Copies are easily obtained.

Description of Examples Examples of the present invention will be described below with reference to comparative examples. A dispersion having the formulation shown in Table 1 was applied to a polyester film having a thickness of 25 μm to form a roughened layer having a thickness of about 8 μm. Further, 200, 4008, and 600 layers of aluminum were deposited thereon by vacuum deposition to obtain transfer mask sheets. All amounts are in parts by weight.

Margin Table-1 Below: Aluminum hydroxide B-703 had an average particle size of 0.4 μm. Furthermore, using a vacuum lid attachment method, aluminum was applied on the roughened layer at a temperature of 20 mm, 400 amps.

A transfer mask sheet was obtained by vapor deposition to a thickness of 8 o〇 using 600 people. The smoothness and surface resistance of each sheet were measured and printed using a discharge breakdown recording device.

The printing conditions were an electrode head with a resolution of 10 lines/cylinder using a hexagonal boron nitride sintered body as a support, and a printing speed of 1.5 m.
/sec, an applied voltage of 40 V, and alphanumeric characters were printed. Table-2
Figure 2 shows the characteristics of the transfer mask sheet and the printing results. The print quality is determined by continuously writing alphanumeric characters on 5 sheets of A-4 paper.
It was evaluated as follows.

0 All 6 sheets can be printed △ 6 sheets printed, some short × 1st sheet, unprintable Below margin table -2 Xl Smoothness... Beck smoothness≠2 Surface resistance -, -J According to the results of Standard C-2316-835 Gold Tumor Effect Test Table-2, when the surface resistance was low, molten aluminum adhered to the electrode needle, making printing impossible.

Furthermore, if the resistance was too high, discharge errors would occur, resulting in only blurry printing. In addition, when the surface smoothness was high, when printing one line, a short circuit occurred between the electrode needles, making printing impossible.

Furthermore, in order to clarify the relationship between smoothness and surface resistance,
We investigated inorganic pigments with different particle sizes. aluminum hydroxide,
B-1403 (average o, 2 μm) Alumina A-32 (average 1 μm), B-103 (average 3-4 pm), B-15
3 (average 16 μm) with different particle sizes were selected, and the content and amount of aluminum vapor deposition were varied and compared under the above conditions.

As a result, as shown in FIG. 4, it was found that there was a printing zone with appropriate surface resistance and smoothness. In other words, in order to perform good printing on the transfer mask sheet, the surface resistance should be 0.3 to 2.6Ω, and the smoothness should be in the range of 5 to 150 seconds, and more preferably the surface resistance should be 0.3 to 2.6Ω. 5-2.
The optimum printing was obtained when the resistance was 0 Ω and the smoothness was in the range of 10 to 1 oO seconds. In other words, if the surface resistance is too high by 1°, a discharge error will occur, and if it is too low, the amount of conductive material adhering to the electrode needles will increase, resulting in a short circuit between the electrode needles. Smoothness indicates the strength of the polishing force used to remove conductive substances adhering to the electrode needles. If the smoothness is high, the polishing force will be reduced and a short circuit will occur between the electrode needles. If the smoothness is too low, the electrode needles will life and print quality. Smoothness 2 When printing on a transfer mask sheet with a surface resistance within the above range using an electrode head fixed with a sintered body of hexagonal boron nitride, continuous high-quality printing can be achieved without the use of auxiliary polishing means. We were able to achieve this without much effort.

In the above example, the support was a polyester film, but the material of the support is not limited to this, and any material may be used as long as it is a highly transparent and heat-resistant sheet, such as capacitor paper. You can also use paper like this.

Effects of the Invention As is clear from the above explanation, the present invention provides a transfer mask sheet in which a roughened layer and a metal vapor deposited layer are sequentially provided on a support, and the surface smoothness of the metal vapor deposited film is the same as the normal smoothness. , 5-1
50 seconds and surface resistance is ■■ S standard C-2316/83
In the metal vapor deposition film test No. 5, the resistance was 0.3 to 2.6 Ω, which enabled high-resolution printing.

Due to this effect, a plurality of good copies can be obtained by performing transfer using a heat-melting ink sheet.

Furthermore, by using a transparent sheet with excellent heat resistance as the support, transferability is improved, and a large number of copies can be made with high accuracy and whiteness.

[Brief explanation of drawings]

Figure 1a is a perspective view of a conventional electrode head;
FIG. 2 is a sectional view of the transfer mask sheet of the present invention, FIG. 3 is a diagram showing the transfer method of the present invention, and FIG. 4 is a perspective view of the electrode head used in the present invention. FIG. 3 is a diagram illustrating a proper printing zone. 101.104...electrode, 102...fixing part, 103...lead, 201.302...
Transfer mask sheet, 202.303...Aluminum vapor deposited layer, 204,305...Support, 3
06...Thermofusible ink sheet, 307...
...~Ink sheet support, 308... Heat-melting ink, 3o9... Flash, 31o
... Ink after transfer, 3o1 ... Receiving paper. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3

Claims (3)

[Claims] (1) In a transfer mask sheet in which a roughened layer and a metal vapor deposited layer are sequentially provided on a support, the surface smoothness of the metal vapor deposited layer is Beck smoothness, 5 to 150 seconds, and the surface resistance is JIS standard C. -2316・835 metal film resistance test: 0.3~
A transfer mask sheet characterized by a resistance of 2.6Ω. (2) The transfer mask sheet according to claim 1, wherein a highly transparent and heat-resistant paper or plastic sheet is used as the support. (3) The transfer mask sheet according to claim 1, wherein aluminum is vapor-deposited on the metal vapor-deposited layer.