JPS5947662B2 - High quality pine film - Google Patents

Description

[Detailed description of the invention] The present invention relates to a translucent conductive matte film.

More specifically, it is a translucent electrically conductive matte film in which a translucent conductive coating is provided on the roughened surface of a plastic film roughened on one or both sides, such as a so-called sand matte film or a chemical matte film. Regarding. Recently, there has been a growing demand for conductive glasses such as ``Nesa Glass'' and ``EC Glass'', which have transparent and electrically conductive coatings. Transparent conductive films are being developed. (For example, JP-A No. 5
0-1172) However, in some of the fields in which these sheets with transparent and conductive coatings are used, transparency is not necessarily required, and there are cases where it is sufficient to have a scattering light transmittance like that of frosted glass. Well, in such a case, it would be better to provide a light-transmitting conductive coating on the roughened film to improve the adhesion of the coating and the contact between the film and other functional layers such as the light-emitting layer and photoconductive layer. It has been found that large areas yield favorable results. The present invention was achieved as a result of research based on the above facts in the process of producing transparent conductive films and developing applications. That is, the present invention is characterized in that an oxide film containing indium oxide as a main component is provided on the roughened surface of a plastic sheet that is roughened on one or both sides along the unevenness of the roughened surface. It is a translucent conductive matte film.

The roughened plastic sheet of the present invention includes a so-called sand matte film, which is roughened by blowing sand onto the surface during film molding, and a roughened plastic sheet by applying inorganic fine powder together with a binder resin component onto the film surface. It is a transparent or translucent plastic sheet, such as a surfaced so-called Chemimat film or translucent synthetic paper.

Preferred plastic materials include polyester,
Examples include polycarbonate, triacetate resin polypropylene, and other materials having good dimensional stability and mechanical properties, but any polymeric material that can be molded into a sheet may be used without particular limitation. The indium oxide film of the present invention is an oxide film in which at least 80 wt% is In2O3 and 20 wt% or less of sno2 is added thereto. This oxide film is not a complete In2O3 or SNO2 film, but is a type of n-type semiconductor with a very slight oxygen deficiency.

The thickness of the oxide film varies depending on required characteristics such as conductivity and transparency, but is at least 30A, preferably 100λ to 700λ.

Since the roughened surface of the plastic sheet of the present invention has more irregularities than the surface of a normal film, it is desirable that the thickness of the reoxide film be greater than that of a normal transparent conductive film.
Such a film can be formed by the following method.

That is, an oxide film is formed on the roughened surface of the plastic sheet by vacuum evaporation of metallic indium or indium oxide, reactive vacuum evaporation (in a low-pressure oxygen atmosphere), cathode sputtering, plasma spraying, etc. However, if necessary, post-treatment such as oxidation treatment is performed. From the viewpoint of uniformity of the formed film and ease of production, indium is deposited on the roughened surface of the plastic sheet by vacuum evaporating a metal oxide whose main component is indium oxide under high vacuum. A black film containing low oxides as the main component is formed, and then this is heated and oxidized.
Particularly preferred are oxidation treatment methods such as anodic oxidation and liquid phase oxidation. The translucent, electrically conductive matte film of the present invention is a matte film that has both translucency and electrical conductivity. The translucency mentioned here does not mean that the reaction side can be clearly seen through like transparent glass, but rather that the original image can be read when superimposed on the original image through a vacuum layer, such as with re-frosted glass or tracing paper. This refers to scattering and translucency that makes it possible to clearly read the original drawing when it is placed in close contact with the original drawing. The degree of conductivity varies depending on the application; for example, when used as an electroluminescent electrode, it is less than 10 kΩ/mouth;
When used as a conductive support for electrophotography for second original drawings, the resistance is preferably 10° Ω or less.

The translucent conductive matte film of the present invention is useful in fields such as translucent electrodes for area illumination devices such as electroluminescence, electroconductive supports for electrophotography, and antistatic sheets. There are the following advantages in such cases.

(1) When used as a translucent electrode in a surface illumination body, etc., the contact area with the light emitting layer increases, the adhesion with the light emitting layer improves, and the light emitting area increases.

(2) When used as a conductive support for electrophotography for second original drawings, the adhesion with the photoconductive layer is improved, and like tracing paper, the drawings are easy to see due to the whiteness due to scattered light. It has high copyability as an original drawing.

(3) High abrasion resistance when used in antistatic sheets, etc.

That is, since the translucent conductive pine film of the present invention has a coating on its rough surface, when it rubs against another object, the convex portions selectively come into contact with each other, so that the conductivity as a whole is less likely to be impaired. . Although three typical application examples have been described above, the present invention is not limited thereto.

Next, the translucent conductive matte film of the present invention will be explained with reference to the drawings.

FIG. 1 shows one example of the translucent conductive matte film of the present invention.

1 is a plastic sheet with one side roughened; 2
is a light-transmitting conductive oxide film formed on the roughened surface of No. 1 along the unevenness of the rough surface.

FIGS. 2 and 3 show another embodiment of the invention. That is, the second
The figure shows an example in which an oxide film 2 is formed on one rough surface of a double-sided matte film, and FIG. 3 shows an example in which an oxide film is formed on each of the rough surfaces on both sides of a double-sided matte film.

[Brief explanation of drawings]

1, 2, and 3 are cross-sectional views of the translucent conductive matte film of the present invention.

Claims (1)

[Claims] 1. A translucent conductor characterized in that an oxide film containing indium oxide as a main component is provided on the roughened surface of a plastic sheet with one or both surfaces roughened along the unevenness of the rough surface. matte film.