A method for processing a polarizing sheet polyvinyl alcohol optical film
By optimizing the casting angle and the heating evaporation molding parameters, the problems of apparent defects and unstable optical performance in the aqueous casting method were solved, and the production of high-quality polyvinyl alcohol optical films was realized, which are suitable for high-end polarizers.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ANHUI WANWEI UPDATED HIGH TECH MATERIAL CO LTD
- Filing Date
- 2026-05-28
- Publication Date
- 2026-07-17
AI Technical Summary
The existing aqueous solution casting method for producing polyvinyl alcohol optical films suffers from problems such as unreasonable casting angle control and improper heating methods, resulting in appearance defects and unstable optical performance, making it difficult to meet the production requirements of high-end polarizers.
A method of casting at a specific angle and heating and evaporation is adopted to control the casting angle α within the range of 0~30°, preferably 15~20°, and rely solely on the heating of the metal roller itself in the initial stage to avoid scratches on the die lip and elastic tensile stress, thereby optimizing the casting and forming parameters.
It significantly improves the appearance quality and optical properties of thin films, reduces production costs, and enhances the stability and controllability of production, making it suitable for the industrial production of high-end polarizers.
Smart Images
Figure CN122401730A_ABST