Method for regulating warpage of polarizer

Abstract

The invention relates to a method for regulating the warpage of a polarizer, and particularly relates to a method for regulating the warpage of a polarizer body. According to the invention, the feeding speed V0 of a PVA film is taken as a benchmark, and the feeding speed of an upper TAC and the feeding speed of a lower TAC are respectively regulated on the basis of the feeding speed V0, so that the feeding amount of the upper / lower TAC is controlled; and the feeding speed of the upper TAC is regulated to be V0(1+ / -x%), the feeding speed of the lower TAC is regulated to be V0(1+ / -y%), and x andy are positive numbers. Compared with the prior art, the method has the beneficial effects that driving wheels are not directly contacted with the film, and the driving wheels drive driven wheels, sothat relative sliding brought about by the speed difference between the two driving wheels is relieved; laminating wheels are wide in rotating speed control range; the laminating breadth of the laminating wheels is less restricted; an adhesion agent is good in coating uniformity, and the thickness of the adhesion agent after being dried ranges between 50nm-500nm; and the feeding amount of the upper / lower TAC can be changed through controlling the speed difference of the laminating wheels -1 / -2 according to the difference in the thickness, tensile deformation and thermal expansion and contraction coefficient of the upper TAC and the lower TAC on the polarizer structure.

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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