Because LCD display not light, ISO identification requirement in order to display
bright, polarizing film must have a clear, high permeability and high optical
activity. LCD recently becoming more widely used, such as livelihood, military and
high-tech, particularly application of intelligent machines. Due to the diversity of
the LCD and the durability of promotion, we must strengthen the durability and
resistance to rotation of the polarized film.
In addition, the appearance of characters on, with the draw cable LCD improving
polarizing film surfaces must be smooth and fine, if prolonged use at high
temperature and high humidity environment, must also be maintained on the optical
performance, and with one of the key parts of the security requirements for
adhesives, usually in a polarizing film manufacturing process, is carried out in
clean room:
1. is PVA polarizing film footage and TAC, so it is not available on the foreign body and resin that is not soluble.
2. in the polarizing film laminating process, not glue, lamination and when there is any foreign body into.
3. the protection film and release film and other materials may not have any defects.
4. finished surface and cutting surfaces, or on the wrapper should not be mixed with any foreign objects attached to it.
If the above conditions cannot be met, you cannot make a high resolution and large
size, high precision of polarizing film.
More reading：
http://www.touch-times.com/built-in-air-vacuum-pump-semi-automatic-lcd-separator_p0867.html
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