1results about How to "Wide" patented technology

The application discloses a method for improving the width of a polarized film, which comprises the following steps: after the production raw material PVA element of the polarized film is washed, the PVA element is pre-dried and shaped, and then is sent into an oven for drying; the pre-drying and shaping is performed by using two corresponding hot air pipes, the two hot air pipes are located on the upper surface and the lower surface of the PVA element respectively, the hot air pipes are not in contact with the PVA element, and the two hot air pipes respectively blow out hot air streams with a temperature of 80 DEG C to 120 DEG C towards the upper surface and the lower surface of the PVA element; the method overcomes the defects of the prior art, the width shrinkage rate of the PVA element before and after drying is less than 10%, and the polarization degree and the transmittance of the PVA element are ensured.