Japan, Feb. 24 -- SUMITOMO CHEMICAL CO LTD has got intellectual property rights for 'POLARIZING FILM AND MANUFACTURING METHOD FOR POLARIZER.' Other related details are as follows:
Application Number: JP,2021-145249
Category (FI): C08J7/02,G02B5/30,C08J7/00@Z
Stage: PROBLEM TO BE SOLVED: To provide a method of manufacturing a polarizing film which, when exposed to a high temperature environment exceeding 95degC, exhibits superior yellowing suppression effect when an interlayer-filling configuration is adopted and suppresses single transmittance deterioration when the interlayer-filling configuration is not adopted.SOLUTION: A method of manufacturing a polarizing film from a polyvinyl alcohol-based resin film is provided, the method comprising a treatment step of bringing the polyvinyl alcohol-based resin film into contact with a treatment solution containing nitrate, boric acid, and zinc iodide and having a pH of 4.3 or higher at 25degC.SELECTED DRAWING: Figure 1 (Grant)
Filing Date: Sept. 7, 2021
Publication Date: March 17, 2023
The original document can be viewed at: https://www.j-platpat.inpit.go.jp/p0100
Disclaimer: Curated by HT Syndication.
