A method for adjusting warping of polarizer

Abstract

The invention relates to a method for adjusting the warpage of a polarizer, in particular to a method for adjusting the warpage of a polarizer body. Taking the feeding speed V0 of the PVA film as the benchmark, the feeding speed of the upper / lower TAC is based on V0 respectively. Adjust to control the feed amount of the upper / lower TAC; the feed rate of the upper TAC is adjusted to V0 (1±x%), the feed rate of the lower TAC is adjusted to V0 (1±y%), both x and y are Positive number. Compared with the prior art, the present invention achieves the following beneficial effects: the driving wheel is not in direct contact with the film, and the relative sliding caused by the speed difference between the two driving wheels is alleviated by actively driving the driven wheel; Wide control range; the lamination width of the laminating wheel is less restrictive; the adhesive coating uniformity is good, and the adhesive thickness after coating and drying is 50nm~500nm; according to the thickness of the upper / lower TAC and the amount of tensile deformation according to the polarizer structure And the difference of thermal expansion and contraction coefficient, the feed amount of the upper / lower TAC can be changed by controlling the speed difference of the lamination wheel ‑1 / ‑2.

Description

technical field [0001] The invention relates to a method for adjusting the warpage of a polarizer, in particular to a method for adjusting the warpage of a polarizer body. Background technique [0002] In the production process of polarizers, due to the water absorption, thermal shrinkage, tensile ductility, and thickness differences of the upper and lower TAC materials, it is difficult to control the warping of the polarizer body after lamination and drying. The overall warpage of the polarizer after the release film is poor, and the warpage of the polarizer body determines the warpage of the finished polarizer. [0003] Currently, see Figure 1-2 , the bonding method of adjusting the warping of the polarizer body is as follows: the bonding speed V0 of the upper / lower TAC and PVA is the same, so the film feeding amount of the upper / lower TAC and PVA in the bonding process is the same, because the upper / lower The difference in tensile deformation and drying shrinkage of TAC...

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Problems solved by technology

[0003] Currently, see Figure 1-2 , the bonding method of adjusting the warping of the polarizer body is as follows: the bonding speed V0 of the upper / lower TAC and PVA is the same, so the film feeding amount of the upper / lower TAC and PVA in the bonding process is the same, because the upper / lower The difference in the tensile deformation and drying shrinkage of TAC leads to warpage due to the difference in the deformation of the upper and lower TACs after the polarizer body is heated and dried.

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