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Laminated polyester film

A laminated polyester film, polyester film technology, applied in the direction of coating, layered products, synthetic resin layered products, etc., can solve the problems of rising costs and increasing manufacturing processes, and achieve excellent antistatic properties and industrial value high effect

Active Publication Date: 2012-09-26
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the drastic price reduction of liquid crystal displays requires a drastic cost reduction in the processing process of optical sheets, but the above-mentioned undercoat layer is formed by off-line coating, which increases the manufacturing process and raises the problem of cost

Method used

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  • Laminated polyester film
  • Laminated polyester film
  • Laminated polyester film

Examples

Experimental program
Comparison scheme
Effect test

manufacture example

[0027] Next, although the production example of the polyester film in this invention is demonstrated concretely, it is not limited to the following production example at all. That is, it is preferable to obtain an unstretched sheet by cooling and solidifying a molten sheet extruded from a die with a cooling roll using the above-mentioned polyester raw material. At this time, in order to improve the planarity of the sheet, it is preferable to increase the adhesion between the sheet and the rotating cooling drum, and it is preferable to use an electrostatic application adhesion method and / or a liquid coating adhesion method. Next, the obtained unstretched sheet is stretched in biaxial directions. At this time, first, the aforementioned unstretched sheet is stretched in one direction by a stretching machine of a roll or tenter type. The stretching temperature is usually 70 to 120°C, preferably 80 to 110°C, and the stretching ratio is usually 2.5 to 7 times, preferably 3.0 to 6 t...

Embodiment 1

[0144] Mix polyester (A), (B), and (C) in proportions of 85%, 5%, and 10% respectively as raw materials for the outermost layer (surface layer), and mix polyester in proportions of 95%, 5%, respectively. The mixed raw materials of esters (A) and (B) are supplied to two extruders as the raw materials for the middle layer, and after being melted at 290°C, two kinds of three layers (surface layer / intermediate layer / surface layer=1:18:1 discharge rate) layer structure co-extruded, cooled and solidified to obtain an unstretched sheet. Next, using the difference in roll rotation speed, the film was stretched 3.4 times in the longitudinal direction at a film temperature of 85°C. After that, one side of the longitudinally stretched film was coated with the coating liquid 1 shown in Table 1 below, and after drying, it was 0.09. g / m 2 , apply the coating liquid 10 on the opposite side, and let it dry to 0.03g / m 2 , introduced into a tenter, stretched 4.0 times at 120° C. in the trans...

Embodiment 2～6

[0147] In Example 1, except having changed the coating agent composition into the coating agent composition shown in Table 1, it manufactured similarly to Example 1, and obtained the polyester film. Table 2 shows the properties of the obtained polyester film.

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Abstract

Disclosed is a laminated polyester film which is suitable for applications wherein good silppability, sticking prevention and antistatic properties are required, for example, applications such as a constituent member of a liquid crystal display. Specifically disclosed is laminated polyester film that comprises a coating film, which contains a resin and an antistatic agent and does not substantially contain particles, while having a difference in height of 0.04 [mu]m or more, on one surface of a polyester film. The laminated polyester film also comprises a coating film, which contains a resin, on the other surface of the polyester film.

Description

technical field [0001] The present invention relates to a laminated polyester film, and in particular to a laminated polyester film suitable for microlens sheets, prism sheets, light diffusion sheets, touch panel parts, etc. used in backlight units of liquid crystal displays, etc., and having excellent sliding properties and anti-sticking properties membrane. Background technique [0002] In recent years, liquid crystal displays have been widely used as display devices for televisions, computers, digital cameras, mobile phones, and the like. In these liquid crystal displays, the liquid crystal display unit alone does not have a light emitting function, and therefore, a method of displaying by using a backlight and irradiating light from the back side is common. [0003] Various optical sheets such as microlens sheets, prism sheets, and light diffusion sheets are used to improve the optical efficiency of backlights and increase brightness. In these optical sheets, an underc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36B05D7/04B32B27/18C08J7/06C08J7/043C08J7/044C08J7/046C09D7/65
CPCB32B27/18C08J2433/02B05D2201/04B32B27/40B32B27/308C09D7/125C08J2439/04C08L2666/86C09D5/24C08J2439/02C08J2475/04B32B27/36B05D2252/02C08J2367/02B32B2457/202C08J7/047B05D5/08C09D5/1681C09D7/65Y10T428/24355C08J7/0427C08J7/043C08J7/046C08J7/044B32B2367/00
Inventor 川崎泰史藤田真人
Owner MITSUBISHI CHEM CORP
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