The basic structure of the polarizer includes: the middle PVA (polyvinyl alcohol), two layers of TAC (triacetyl cellulose), PSA film (pressure sensitive adhesive), Release film (release film) and Protective film (protective film). Among them, the PVA layer plays the role of polarization, but PVA is easily hydrolyzed. In order to protect the physical properties of the polarizing film, a layer of high light transmittance, good water resistance and certain mechanical strength is laminated on both sides of the PVA. (TAC) film for protection, which forms the original polarizer. In the production of ordinary TN LCD polarizers, according to different usage requirements, it is necessary to coat a certain thickness of PSA on one side of the original polarizer, and compound it with an isolating film that protects the PSA; while on the other side, according to the product Type, respectively composite protective film, reflective film, semi-transparent and semi-reverse adhesive layer film, thus forming the finished polarizer. For STN LCD polarizer products, the PSA layer side is also required, according to the different needs of customers, according to the different needs of customers, according to a certain compensation angle to compound the retardation film and the protective film with a positioning phase difference compensation value, thereby forming the STN LCD polarizer Product, this is the basic structure and working principle of LCD polarizer.
The pressure-sensitive adhesive used is a high-temperature and moisture-proof pressure-sensitive adhesive, and the PVA is subjected to a special dipping treatment (dye series products). The polarizer made is a wide-temperature type polarizer; add blocking in the pressure-sensitive adhesive used The components through which the ultraviolet rays pass can be made into anti-ultraviolet polarizer; the birefringent optical compensation film can be compounded on the original transmission film to make the polarizer for STN; the light redirecting film can be compounded on the original transmission film to make A wide viewing angle polarizer or a narrow viewing angle polarizer; coloring the pressure-sensitive adhesive, PVA film or TAC film used is a color polarizer. In fact, with the continuous development of new liquid crystal display products, there are more and more types of polarizers.
