基本信息:
- 专利标题： 聚乙烯醇系聚合物膜
- 专利标题（英）：POLYVINYL ALCOHOL-BASED POLYMER FILM
- 申请号：CN201710976700.8 申请日：2013-03-19
- 公开(公告)号：CN107656334A 公开(公告)日：2018-02-02
- 发明人： 笹井弘治 , 丰岛悠 , 水口广行 , 大福幸一 , 胜野良治 , 风藤修
- 申请人： 株式会社可乐丽
- 申请人地址： 日本冈山县仓敷市酒津1621番地
- 专利权人： 株式会社可乐丽
- 当前专利权人： 株式会社可乐丽
- 当前专利权人地址： 日本冈山县仓敷市酒津1621番地
- 代理机构： 中国专利代理(香港)有限公司
- 代理人： 高旭轶; 万雪松
- 优先权： 2012-079498 2012.03.30 JP
- 主分类号： G02B5/30
- IPC分类号： G02B5/30 ; G02B1/04 ; B29C41/26 ; C08J5/18
To provide a PVA-based polymer film from which a polarizing film or polarizing plate that have few defects can be produced in high yield, and to provide a PVA-based polymer film roll in which the surface properties fluctuate little throughout the whole film ranging from the initially wound portion to the finally wound portion thereof and from which a polarizing film or polarizing plate of stable quality can be produced. A PVA-based polymer film in which the number of defects that are recesses in the film surface and that each have an area of 400 mum2 or larger and a depth of 0.3 mum or more is0.25 per m2 or less; and a film roll obtained by continuously winding up a long PVA-based polymer film, wherein with respect to defects that are recesses in the film surface and that each have an area of 400 mum2 or larger and a depth of 0.3 mum or more, the ratio of the number of the defects in the finally wound portion of the PVA-based polymer film to the number of the defects in the initiallywound portion of the PVA-based polymer film is 1.4 or less.
公开/授权文献:
- CN107656334B 聚乙烯醇系聚合物膜 公开/授权日：2021-04-27