| abstract |
The invention provides a kind of manufacture method of polarizing film, it can manufacture the polarizing film with high polarisation function effectively.The feature of the manufacture method of polarizing film of the present invention is, on its mobile route, dyeing at least implemented to this first polyvinyl alcohol (PVA) while make the first polyvinyl alcohol film in the banded polyvinyl alcohol film of more than 2 move limit in the longitudinal direction and stretch, and, the terminal part of described first polyvinyl alcohol resin film connects the leading section of the second polyvinyl alcohol resin film, thus continuously described dyeing and stretching are at least implemented to described first polyvinyl alcohol resin film and the second polyvinyl alcohol resin film, wherein, by adopting the configuration making described terminal part overlap with described leading section, and by its interface portion laser welding, thus implement described connection. |