A kind of color double-sided antistatic polyester film and preparation method thereof

Abstract

The invention provides a colored double-sided antistatic polyester film and a preparation method thereof. It is a CBABC five-layer film, wherein layer A is a colored layer, layer B is a surface modification layer, and layer C is an antistatic coating layer. Among them, the thickness of layer A accounts for 75-78%, the thickness of layer B accounts for 20-21%, and the thickness of layer C accounts for 2-4%. Utilizing the characteristics of long-term effect, transparency, and low humidity sensitivity of nano-scale antistatic coatings, and adopting surface online coating technology, antistatic BOPET films with strong adhesion, long service life and high flatness are prepared. In the preparation method of the present invention, the base film is prepared by three-layer co-extrusion, wherein the color of the core layer of layer A can be adjusted by changing the type of color masterbatch added, and the surface layer of layer B contains SiO 2 , after the high-voltage corona roller tip discharge corona treatment, it has a high bonding force with the C-layer nano-antistatic coating, and the surface resistance of the C-layer antistatic layer can reach 10 4 -10 6 Ω, has good antistatic properties. The antistatic coating prepared by the online coating process has good smoothness, low production cost and high efficiency.

Description

technical field [0001] The invention belongs to the technical field of biaxially stretched polyester films, and relates to a colored double-sided antistatic polyester film and a preparation method thereof. Background technique [0002] Biaxially oriented polyester film (BOPET) has excellent physical and chemical properties, mainly including PET, PBT and PEN, among which PET is a linear polyester polymer material and is the most commonly used polyester material. Because PET has excellent characteristics (high temperature resistance, corrosion resistance, electrical insulation, etc.), and the price is relatively low, it is widely used in materials such as fibers and films. In the field of electronic display, antistatic polyester film has a wide range of applications. With the development of the times, due to the excellent electrical insulation of BOPET, its surface resistance can reach 10 13 Ω or so, it is very easy to generate and accumulate static electricity when rubbing....

AI Technical Summary

Problems solved by technology

The internal addition method is to dope the antistatic agent or conductive filler into the resin to achieve the antistatic effect. For example, "An Antistatic Polyester Film and Its Preparation Method" published by the patent application number 2011025089.0, the organic nano antistatic Add the antistatic agent and inorganic nano antistatic agent to the polyester layer after mixing. The antistatic film produced by this method has limitations: (1) the use of internally added inorganic nano antistatic agent is compatible with the film substrate, and the surface resistance of the film The decline is limited, generally not less than 10 9 Ω, so the antistatic effect is also general, and affects the mechanical properties of the film; (2) Adding anti-organic nano-antistatic agents has a long-lasting antistatic effect, and the antistatic effect is fast, and it is dependent on the relative humidity of the air Small and other advantages, but because the compatibility state of this type of antistatic agent and the film substrate resin is only partially compatible, it will affect the transparency of the film

[0004] The invention patent of patent number CN 102604455 B discloses an antistatic film and its preparation method. In this patent, an acrylate antistatic coating is coated on the outer surface of the film, and a film with a hardness of 2H is obtained after curing by ultraviolet light. The surface resistance value of this thin film can be reduced to 10 8 -10 11 Ω, its advantage is that the coating process is simple, the production efficiency is high and the application is wide, the disadvantage is that the acrylic resin coating is too hard after curing, the coating is easy to separate from the base film, and the service life is short

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