申请人:Fuji Photo Film Co., Ltd.
公开号:EP1237017A1
公开(公告)日:2002-09-04
Polarizing plate protection film for applying on at least one surface of polarizer characterized in that the moisture permeability is 3-10 g/m2 x 24hr is proposed.
The polarizing plate protection film further contains equilibrium moisture content of 60% RH at 25 degrees Celsius is 0.01-1.5 %, 1-20% of hydrophobic plasticizer and 0.001-5% of degradation inhibitor.
The present invention prevents degradation of damp proof thermal characteristics of the polarizing plate protection film by adjusting moisture permeability in suitable range, and maintain polarizing capability well, and at the same time, the adhesive property between the polarizer and the polarizing plate protection film can be improved well.
According to the invention, moreover, the productivity of the polarizing plate protection film increases, and the liquid crystal display device using the polarizing plate protection film of the invention shows wide viewing angle and high contrast ratio.
建议在偏光板的至少一个表面上使用偏光板保护膜,其特征在于透湿性为 3-10 克/平方米 x 24 小时。
偏光板保护膜还含有 0.01-1.5 %(在 25 摄氏度、60%相对湿度条件下)的平衡含水量、1-20 % 的疏水增塑剂和 0.001-5 % 的降解抑制剂。
本发明通过将透湿性调整在合适的范围内,防止偏光板保护膜的防潮热性能退化,并能很好地保持偏光能力,同时还能很好地改善偏光片与偏光板保护膜之间的粘合性能。
此外,根据本发明,偏光板保护膜的生产率提高,使用本发明偏光板保护膜的液晶显示设备具有广视角和高对比度的特点。