Method for enhancing inner protection film hydrophilicity of polaroid

A technology of protective film and polarizer, applied in polarizing elements and other directions, can solve problems such as increased production cost, and achieve the effects of reducing the pressure of environmental protection treatment, improving the degree of infiltration, and reducing the concentration
CN101424764AActive Publication Date: 2009-05-06SHENZHEN SAPO PHOTOELECTRIC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN SAPO PHOTOELECTRIC
Publication Date
2009-05-06

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Abstract

The invention relates to a method for increasing the hydrophilicity of a protecting film in a polaroid. In the process of alkali treatment of the protecting film, the method adds a quaternary ammonium salt cation surface active agent with the following chemical structural formula. In the formula, R1, R2, R3 and R4 are alkyl chains, wherein at least one carbon chain is less than or equal to 2, and at least one carbon chain is between 12 and 20; X is one of F, Cl, Br and I of halogen elements; the addition of the surface active agent is 0.001-1 percent; the concentration of the treatment fluid (alkali solution) is from 2-12 percent; the treatment temperature is from 26-45 DEG C; and the treatment time is from 60-110s. On the premise of guaranteeing the treatment effect of the hydrophilicity, the addition of the surface active agent can reduce the concentration of the alkali solution, reduce the treatment temperature (and / or shorten the treatment time); and simultaneously, the uniformity of the treatment is obviously increased, thus, the production cost is lowered, and the pressure of environmental protection treatment is lightened.
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Description

technical field

[0001] The invention belongs to a method for improving the hydrophilicity of a protective film inside a polarizer. Background technique

[0002] Liquid crystal display (LCD) utilizes the optoelectronic properties of liquid crystal materials, has the advantages of low voltage, low power consumption, good display effect, easy to carry, wide application fields, etc., and occupies a dominant position in today's flat panel display field (LCD, PDP, rear projection) .

[0003] The working principle of the LCD display is to change the deflection angle of the liquid crystal molecules through an external electric field, and this change can only be converted into visual information (digital, pattern, color, etc.) through the polarizing and analyzing functions of the polarizer. Therefore, the polarizer is one of the indispensable important components in the LCD. Polarizers account for 8-15% of the total production cost in the entire LCD display device.

[0004] The pr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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