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Polycarbonate film for polaroid and manufacture method thereof

A technology of polycarbonate film and polarizer, applied in optics, optical elements, polarizing elements, etc., can solve the problems of unpopularity, high price, complicated operation, etc.

Inactive Publication Date: 2009-12-02
DAXON TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this kind of equipment is more complicated to operate, and the price is higher, so it is not popular

Method used

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  • Polycarbonate film for polaroid and manufacture method thereof
  • Polycarbonate film for polaroid and manufacture method thereof
  • Polycarbonate film for polaroid and manufacture method thereof

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Embodiment Construction

[0020] The invention provides a polycarbonate film used for a polarizer and a manufacturing method of the polycarbonate film. The optical properties of the polycarbonate film used for polarizers of the present invention include: the full spectrum average transmittance is greater than 86%; the haze is less than 1%; the in-plane retardation is less than 15nm; and the out-of-plane retardation is less than 50nm. The polycarbonate film further has mechanical properties such that the ratio of longitudinal strength to transverse strength is between 0.7 and 1.4. Since the polycarbonate material itself does not need to be stretched, it has optical properties close to isotropy, and the material cost is low. Therefore, the polycarbonate film for polarizer of the present invention has isotropic optical properties and low manufacturing cost.

[0021] In a preferred embodiment, the polarizer includes at least a protective film, and the protective film includes a polycarbonate film. Such a...

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Abstract

The invention relates to a polycarbonate film for a polaroid and a manufacture method thereof. The polycarbonate film has the optical characteristics that the average penetration rate of a full spectrum is larger than 86 percent, the mist degree is smaller than 1 percent, the inside delay is smaller than 15 nm, and the outside delay is smaller than 50 nm. The manufacture method of the polycarbonate film for the polaroid comprises the following steps: heating melted polycarbonate particulates to form a polycarbonate solution; extruding the polycarbonate solution to flow from a T-shaped mold; and cooling and molding the polycarbonate solution by a cooling wheel to form the polycarbonate film.

Description

technical field [0001] The present invention relates to a polycarbonate film used for a polarizer and a manufacturing method thereof. Background technique [0002] Polyethylene (PE) is generally used as a material for polarizer protective films. However, with the high functionality of Liquid Crystal Display (LCD) products, the requirements for physical properties such as strength and scratch resistance of the protective film are increasing. The more stringent, the higher quality polyethylene terephthalate (polyethylene terephthalate, PET) film tends to quickly replace polyethylene film. Although in terms of cost-effectiveness, the price of polyethylene terephthalate film is about 5 times that of polyethylene film, and it is at a considerable disadvantage in the competition of finished products; defects, which affect the quality and pass rate of panels produced throughout the month. [0003] The structure of the existing polarizing plate protective film 80 is shown in Figur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/10G02B5/30G02B1/14
Inventor 杨昆炫陈玉珮庄雅杰吴建宏
Owner DAXON TECH INC
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