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Biaxially stretched polyester film

A biaxial stretching, polyester film technology, applied in polyurea/polyurethane coatings, electronic equipment, applications, etc., can solve the problems of penetration, low swelling effect, and insufficient adhesion of the easy-bonding layer

Active Publication Date: 2011-08-31
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned solvent-free ionizing radiation-curable resin does not contain an organic solvent, so it has low penetration and swelling effects into the easy-adhesive layer on the polyester film, and the adhesiveness on the commonly used easily-adhesive layer tends to change. Insufficient

Method used

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  • Biaxially stretched polyester film
  • Biaxially stretched polyester film
  • Biaxially stretched polyester film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6 and comparative example 1～4

[0137] With the mixed raw material that is mixed with polyester (2), (3) in the ratio of 90% and 10% respectively as the raw material of the outermost layer (surface layer), with polyester (1) as the raw material of the middle layer, provide respectively to 2 An extruder, after melting at 285°C, co-extrudes two types of three-layer (surface layer / middle layer / surface layer) layer structures on a cooling roll set at 40°C, and then cools and solidifies to obtain Unstretched sheet. Next, the film was stretched 3.3 times in the longitudinal direction at a film temperature of 85° C. using a difference in the peripheral speed of the rolls. On both surfaces of the longitudinally stretched film, the aqueous coating liquids in the separate table were coated by bar coating, respectively. Thereafter, it is introduced into a tenter, dried at 120°C, preheated, stretched 3.8 times in the transverse direction, and then heat-treated at 220°C, and then relaxed by 4% in the transverse directio...

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Abstract

Disclosed is a biaxially stretched polyester film which can be adhered on a solvent-free ionizing-radiation-curable resin (e.g., a lens layer) readily and has high antistatic properties. The biaxially stretched polyester film comprises a film and a coating layer applied on at least one surface of the film, wherein the coating layer comprises a polyurethane resin (A) and a cationic high-molecular-weight antistatic agent (B), and wherein the polyurethane resin (A) contains a compound produced by quaternizing a tertiary amino group in a chain-extending agent having the tertiary amino group in the molecule and a polycarbonate polyol as constituent units.

Description

technical field [0001] This invention relates to the biaxially stretched polyester film which can be used suitably as a base film of the optical member for liquid crystal displays, for example. Background technique [0002] In recent years, the number of rapidly increasing liquid crystal display devices is roughly divided into a backlight unit that collects light from a light source on the viewing side and forms a uniform surface light source, and a backlight unit that adjusts an applied voltage for each display pixel and controls the red color. Two types of units of the liquid crystal element layer unit displayed by the light quantity of , green and blue light. [0003] Wherein, the backlight unit is composed of a light guide plate, a diffusion film and a prism sheet; viewed from the viewing side, the light guide plate uses a cold-cathode tube light source with a phosphor having luminescence characteristics in the red, green, and blue wavelength regions. The role of effici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36C08G18/83C08J7/04G02B5/00G02F1/1335C08J7/043C08J7/044C08J7/046
CPCC08G18/0814C08J7/047C08J2475/00C08G18/4018C08J2367/02C08G18/6603C09D175/06C08G18/44C08J7/0427C09K2323/00C08J7/043C08J7/046C08J7/044B32B27/36B32B27/40B29C55/12B32B2307/21B32B2369/00B32B2457/202
Inventor 增田成裕神田俊宏藤田真人
Owner MITSUBISHI CHEM CORP
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