JPS6294332A - Heat-resistant antistatic film - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a plastic film for color copying 0IIP. Regarding film.

[Prior art]

Currently, overhead projector films that are generally available are made of a stretched polyester film base with antistatic treatment.
) is copied and used. PPC is a transfer method using carbon toner, and the resulting copy is expressed in black and white. A user may colorize a copy film with a specific pen for the purpose of highlighting a portion, but this is merely a color underline rather than coloring the entire film.

Therefore, OHP, which is used in place of slides, has become popular due to its simplicity, but it can be said that it has not replaced slides in terms of color display. However, in recent years, color copying technology has been perfected and gradually become popular, and color OHP films have since become available on the market.

However, the current film base is a stretched hysterester film, which has insufficient heat resistance. That is,
In a color copier, three colors of toner are sequentially transferred onto a film at a higher temperature than in black and white PPC. The current stretched ester film base starts shrinking and softening at about 70°C, so the finished copy film may have wrinkles or
Dimensions can be expressed and displayed accurately.

[Purpose of the invention]

An object of the present invention is to provide a color copying OHP film which solves the above-mentioned drawbacks in heat resistance of the stretched ester film base and which can express excellent quality and □ images.

[Structure of the invention]

The film of the present invention is a paste film made of a film containing l-realylate resin as a main component, has an antistatic agent layer applied to both the front and back sides of the film, and has a surface resistance value of 10'' to 1012 Ω/□. This is a heat-resistant anti-electrostatic film for color OHPs, which is characterized by the following: In other words, the base film is formed into a film shape using a resin consisting of a repeating unit of the general formula, lunar realylate, as a main component.

A film (hereinafter referred to as a base film) whose main component is l-realylate resin may contain 1 (less than 1) other substances in addition to the main component, such as a stabilizer, an antioxidant,
Additives such as lubricants and inorganic fillers, 4! polyester resin, polycarbonate resin, polyamide resin, -riphenylene sulfide resin, =lF IJ x-thylimide resin,
Resins such as I resulfone resin and I riethersulfone resin are examples of such resins. The base film usually has a thickness of 75 to 125μ.
A material with a thickness of . The basic characteristics are light transmittance (ASThiD-1003) of go1 or higher, cloudiness (
ASTM D-1003) must be 5 or less. The glass transition temperature of the limb base film is also required to be 150°C or higher. Antistatic layers are applied to both sides of the base film. Examples of antistatic agents include quaternary ammonium shiogo cations, aliphatic sulfonates, higher alcohol sulfate esters a[, iI class full:=r-l phosphate ester salts, and other anionic agents, and betaine phthalmophilic and other interfacial agents. An activator and a partially silanated siloxane antistatic agent are used. The surface resistance value of the film surface is 10”~1011Ω/
Must be within the range of □. If the surface resistance value is lower than 10"Ω/□, the charging performance will decrease, the transferability of each yellow, red, and blue toner will be poor, and the amount of transfer will be different between toners. , a problem occurs with color tone reproducibility.1611Ω/□
If the surface resistance value is high, will it cause damage to the sheet surface? - errors occur, causing defects in copies. In terms of stability of surface resistance, durability, heat resistance, etc., quaternary ammonium salts and partially silanated siloxane-based antistatic agents are more preferable.

〔Effect of the invention〕

When a color copying OHP film was produced using the film according to the present invention, there was no deformation, wrinkles, or shrinkage of the film that occurs with stretched I-ester film, and the quality was good.
A P film was obtained. In addition, there was no difference in color tone reproducibility compared to that based on stretched ester film, and there were no printing defects caused by snowzoke.

〔Example〕

Examples and comparative examples are listed and explained in Table-1.

In Table 1, the coated surface refers to the surface to which toner is transferred.

A gravure coater was used in both cases. The surface resistance value is based on ASTM D-1003. Unit Ω/□

Claims (1)

[Claims] 1. The base film is a film mainly composed of polyarylate resin, and an antistatic layer is applied to both the front and back sides of the film, and the surface resistance value is 10^8 to 10.
A heat-resistant anti-static film for color OHP, characterized by a resistance of ＾1＾2Ω/□. 2. The heat-resistant antistatic film for color OHPs according to claim 1, wherein the antistatic layer is a partially silanated siloxane layer or a quaternary ammonium salt-based antistatic agent layer.