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Multilayer polyester film and coating composition

A technology of polyester film and composition, applied in the direction of coating, layered products, synthetic resin layered products, etc., can solve the problems of reduced antistatic performance and antistatic performance, and achieve excellent antistatic performance and antistatic performance. The effect of difficulty

Pending Publication Date: 2022-01-28
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in the production process of the cover tape, multiple layers such as a primer layer and a sealant layer are formed on the conductive polyester film as the base material, so the antistatic property decreases due to friction during the processing process.
In addition, for example, as listed in Patent Document 6, in order to improve the adhesiveness of the polyester film of the base material and the sealing material, surface treatment such as discharge treatment may be performed, If the surface treatment such as discharge treatment is performed to reduce the adhesiveness of the sealing material, the antistatic performance will be reduced.

Method used

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  • Multilayer polyester film and coating composition
  • Multilayer polyester film and coating composition
  • Multilayer polyester film and coating composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0212]

[0213] As the coating composition 1 which forms the resin layer (X), the aqueous dispersion liquid which consists of A1 / B1 / C1=60 / 30 / 10 (solid content weight ratio) was produced.

[0214]

[0215] PET pellets containing 0.005% by weight of colloidal silica with an average particle diameter of 1.5 μm were sufficiently vacuum-dried, supplied to an extruder, melted at 285° C., extruded in a sheet form from a T-shaped die, and used Electrostatically applied casting method, wound on a mirror casting drum with a surface temperature of 25°C, allowed to cool and solidify. This unstretched film was heated to 90° C. and stretched 3.4 times in the longitudinal direction to form a uniaxially stretched film (B film).

[0216] Next, the coating composition 1 was applied to the corona discharge-treated surface of the uniaxially stretched film using a bar coating method. Both ends in the width direction of the uniaxially stretched film coated with the coating composition are clam...

Embodiment 2

[0218] According to the conditions described in Example 1, except that an aqueous dispersion composed of A-2 / B-1 / C-1=60 / 30 / 10 (solid content weight ratio) was prepared as coating composition 2, the same as in Example 1 In the same manner, a laminated polyester film was obtained.

Embodiment 3

[0220] According to the conditions described in Example 1, except that an aqueous dispersion composed of A-1 / B-1 / C-1=75 / 15 / 10 (solid content weight ratio) was prepared as coating composition 3, the same as in Example 1 In the same manner, a laminated polyester film was obtained.

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Abstract

A multilayer polyester film according to the present invention comprises a polyester film and a resin layer (X); and at least a surface layer on one side thereof is composed of the resin layer (X). With respect to this multilayer polyester film, the surface resistivity (RX) of the resin layer (X) is from 106 omega / square to 1012 omega / square, and the ratio of the surface resistivity (RY) of the resin layer (X) after having the surface of the resin layer (X) subjected to an abrasion treatment under the conditions described below to the surface resistivity (RX), namely RY / RX is 5.0 or less. Another multilayer polyester film according to the present invention comprises a polyester film and a resin layer (X); and at least a surface layer on one side thereof is composed of the resin layer (X). With respect to this multilayer polyester film, the resin layer (X) contains (A) a resin component, (B) a polystyrene sulfonic acid and / or a salt thereof, and (C) a polyhydric alcohol; and the glass transition temperature of the resin component (A) is from 40degC to 120 degC (inclusive). The multilayer polyester films according to the present invention have excellent antistatic properties that are not likely to deteriorate due to abrasion during conveyance in processing steps or a surface treatment such as a corona discharge treatment. The multilayer polyester films according to the present invention are able to be used as protection films that are used for electronic components or the like, and are especially suitable for use in cover tapes.

Description

technical field [0001] The present invention relates to a laminated polyester film having a polyester film and a resin layer, and a coating composition. Background technique [0002] Among thermoplastic resin films, biaxially oriented polyester films have excellent properties in terms of mechanical properties, electrical properties, dimensional stability, transparency, chemical resistance, etc., and are therefore used in many applications such as magnetic recording materials and packaging materials. widely used. [0003] However, polyester is generally an insulating resin, and therefore, a biaxially oriented polyester film has a disadvantage of not having antistatic properties when used as it is. Antistatic properties are properties imparted for the purpose of suppressing foreign matter defects caused by dust adhesion due to electrification, and can be imparted, for example, to the surface or inner layer of an insulating material such as a biaxially oriented polyester film ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C55/04B29C55/12B32B27/36C08K5/053C08L25/18C08L101/00C09D133/06C09D201/00C08L71/02C09D7/63C09D7/65B32B7/025C08J7/044
CPCB29C55/04B29C55/12B32B7/025B32B27/36C08J7/044C08K5/053C08L25/18C08L71/02C08L101/00C09D7/63C09D7/65C09D133/06C09D201/00C08J5/18C09J125/18C08J2367/02
Inventor 岩谷忠彦阿部悠泽本惠子田中照也坪仓翔
Owner TORAY IND INC