| abstract |
A polarizing film having excellent polarizing performance and low shrinkage stress is provided. In a polarizing film comprising a polyvinyl alcohol film containing an iodine-based dichroic dye, the degree of polarization when the transmittance is 43.5% is 99.990% or more, and the shrinkage stress is 45 N / mm 2 or less. And At this time, it is preferable that the polymerization degree of polyvinyl alcohol is 2500-3500, and it is also preferable that the thickness of a polarizing film is 1-30 micrometers. Such a polarizing film can be produced by applying specific production conditions when performing at least a swelling process, a dyeing process, a first crosslinking stretching process, and a second crosslinking stretching process in this order on the polyvinyl alcohol film. . [Selection] Figure 2 |