Optical polyester film and preparation method thereof

An optical polyester film and film technology, which is applied in the field of polyester film, can solve problems such as bumps and adhesions during storage, and easy scratches on the film, and achieve the goals of reducing haze, ensuring winding performance, and high light transmittance Effect

Active Publication Date: 2010-10-20
CHINA LUCKY FILM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Another technical problem to be solved by the present invention is to provide a manufacturing method of the optical polyester film. The method has a simple process, and it solves the problem that the film produced by the existing method is easy to be scratched, and bumps and bumps are easily generated during storage after winding. Adhesion and other problems

Method used

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  • Optical polyester film and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Preparation of cross-linkable resin coating liquid:

[0039] Acrylic resin with curing agent

[0040] Seika-beam EXF-01L (NS) (manufactured by Dainichi Seika Co., Ltd.), solid concentration 100%.

[0041] 2 Preparation of polyester film

[0042] The polyester chips are crystallized and dried at 170°C; the dried chips are melted and extruded through an extruder at a temperature of 260°C, and the polyester melt flows out through a die to a casting roller at 30°C and is rapidly cooled to form a thick sheet; The sheet enters the longitudinal stretching machine, after being preheated by the preheating roller and heated by the infrared heater, it is stretched 3.1 times longitudinally at a temperature higher than the glass transition temperature of the polyester, and then cooled rapidly; the longitudinally drawn sheet enters the transverse stretching machine, After being preheated at 95°C in the preheating zone, it is stretched 3.2 times in the transverse direction, heat-...

Embodiment 2

[0044] 1. Preparation of cross-linkable resin coating liquid:

[0045] Acrylic resin containing curing agent: SU-683 (Dizhan International), solid concentration 80%.

[0046] 2. Film preparation:

[0047] The polyester chips are crystallized and dried at 165°C; the dried chips are melted and extruded through an extruder at a temperature of 260°C, and the polyester melt flows out through a die to a casting roller at 25°C and is rapidly cooled to form a thick sheet; The sheet enters the longitudinal stretching machine, after being preheated by the preheating roller and heated by the infrared heater, it is stretched 3.0 times longitudinally at a temperature higher than the glass transition temperature of the polyester, and then cooled rapidly; then coated with polyacrylate resin type adhesive The bottom layer of the mixture, the longitudinal stretching sheet enters the transverse stretching machine, after being preheated at 100°C in the preheating zone, it is stretched 3.3 times...

Embodiment 3

[0049] 1. Preparation of cross-linkable resin coating liquid:

[0050] Acrylic resin with curing agent

[0051] LC-5537-30 (manufactured by Changxing Chemical Industry: solid content 30%) 33 parts by weight

[0052] Butanone 67 parts by weight

[0053] In a container with a stirrer, add acrylic resin LC-5537-30 (manufactured by Changxing Chemical Industry: 30% solid content) and butanone containing a curing agent according to the above ratio, stir and mix evenly to obtain a coating with a solid concentration of 10%. cloth liquid.

[0054] 2. Film preparation:

[0055] The polyester chips are crystallized and dried at 150°C; the dried chips are melted and extruded through an extruder at a temperature of 300°C, and the polyester melt flows out through a die to a casting roll at 15°C and is rapidly cooled to form a thick sheet; The thick sheet enters the longitudinal stretching machine, after being preheated by the preheating roller and heated by the infrared heater, it is st...

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Abstract

The invention relates to an optical polyester film and a preparation method thereof; the film comprises base material prepared from two-way stretched polyester and a crosslinkable resin layer coated on at least one surface of the base material; the concentration of solid in the coating liquid of the crosslinkable resin is 10 to 100 percent; and the film does not contain any additive particle, andis characterized by high total light transmission, low haze, high surface smoothness and good anti-scratch effect. The preparation method solves the complicated production process that the film is wound after corona treatment and then unwound and applied after arriving at the factory of a user, has simple process, solves the problems that the film is easy to produce protruding points, adhesion and the like after being wound and stored, and simultaneously reduces the film manufacturing cost. The optical polyester film can be widely applied in producing touch screens, and effectively protects the surface of display devices.

Description

technical field [0001] The invention relates to a polyester film, in particular to an optical polyester film and a manufacturing method of the optical polyester film. Background technique [0002] Polyester films have been widely used in recent years due to their excellent optical properties, good mechanical properties and heat resistance. Biaxially oriented optical polyester film has been widely used in the deep processing of various optical polyester film materials due to its good dimensional stability, chemical resistance, high transparency and good processability compared with other plastic films. In the fields of LCD, CRT, PDP, EL and other display devices, as well as the field of high-end IMD film interior decoration processing. [0003] Usually, the deep processing process of optical polyester film materials is the process of post-processing the polyester film and endowing the film with special functions by means of printing, coating, evaporation, sputtering, casting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/10G02B1/04B29D7/01B29C47/92B29C41/22B29C48/92G02B1/14
Inventor 霍新莉赵保良申跃生王旭亮熊跃斌
Owner CHINA LUCKY FILM CORP
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