The reason for the blistering of the LCD liquid crystal polarizer is as follows

- Aug 16, 2018-



1. Material: After confirming the polarizer used for the material, the polarizer of the material of the raw material manufacturer is confirmed.

       The commitment to high temperature and high humidity durability in the specification and the confirmation of the reliability test of the incoming inspection by the public

       The polarizer used in the model is no problem as a qualified material.

 2, the production process conditions confirmed: through the observation and analysis of the four models of defective products, and after

        After adjusting the defoaming process after the patch, the product was taken for high temperature and high humidity test.

       The experimental method shows that 1 the product is defoamed according to the previous defoaming conditions (previous defoaming conditions are: defoaming pressure: 7.0 kg/cm2; defoaming time: 30 min), and the product is taken for high temperature and high humidity test. Polarizer

      Bad foaming. 2 According to the current adjustment, the defoaming of the product after the patch is heated and defoamed (now heated and defoamed)

      The conditions are: defoaming temperature: 60oC; defoaming pressure 7.0kg/cm2; defoaming time: 30min)

       Sampling for high temperature and high humidity, the product polarizer has no abnormalities on the front and back, and the polarizer is attached normally (no blistering and warping)

        Bad phenomenon)

 3. Confirmed by the verification of the above two materials and the test of the production process, it is confirmed that the four models are produced.

       Reasons for the blistering and cocking of the polarizer: LCD products are defoamed on the polarizer to make the polarizer

       More close to the process of the glass, the defoaming process does not require heating and defoaming during defoaming, production

       During operation, only pressure is applied to defoam, resulting in failure to make the polarizer tighter on the glass, resulting in high temperature and high humidity test.

        After the test, the polarizer has bubbles and a poor separation from the glass surface.


 4. After analyzing the pre-supplement, the process conditions in the «Defoaming Operation Guide» do not require heating and defoaming for the non-screen printing products, and only the screen printing products are required to be heated and defoamed.