Method for cutting polarizing plate and polarizing plate cut using same

Example 1

[0052]A polarizing plate in which a PET film / a TAC film / a PVA polarizing element / a COP film / a tackifier layer / a PET film were stacked in this order was cut in a direction that is the same as the stretching direction of the polarizing plate by using a laser having a beam shape of an ellipse with a ratio of major axis to minor axis of 1:0.5. In this case, the COP film used had a thickness of 60 μm, and the polarizing plate had a thickness of 250 μm. Furthermore, the laser light required to cut the polarizing plate had a minimum pulse energy of 5.4 mJ, and the cutting speed of 333 mm / s.

Example 2

[0053]A polarizing plate was cut in the same manner as in Example 1, except that the polarizing plate was cut in a direction vertical to the stretching direction of the polarizing plate. In this case, the laser light required to cut the polarizing plate had a minimum pulse energy of 6.4 mJ, and the cutting speed of 700 mm / s.

Example 3

[0054]A polarizing plate was cut in the same manner as in Example 1, except that a COP film having a thickness of 40 μm was used and the polarizing plate had a thickness of 230 μm. In this case, the laser light required to cut the polarizing plate had a minimum pulse energy of 5 mJ, and the cutting speed of 333 mm / s.