
基本信息:
- 专利标题: 聚乙烯醇系聚合物薄膜及其制造方法
- 专利标题(英):Polyvinyl alcohol polymer film and process for producing same
- 申请号:CN201410607379.2 申请日:2012-03-19
- 公开(公告)号:CN104311853A 公开(公告)日:2015-01-28
- 发明人: 森保二郎 , 风藤修 , 日笠慎太郎 , 胜野良治
- 申请人: 可乐丽股份有限公司
- 申请人地址: 日本冈山县仓敷市酒津1621番地
- 专利权人: 可乐丽股份有限公司
- 当前专利权人: 可乐丽股份有限公司
- 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; 刘力
- 优先权: 2011-071793 2011.03.29 JP
- 分案原申请号: 2012800158476 2012.03.19
- 主分类号: C08J5/18
- IPC分类号: C08J5/18 ; C08L29/04 ; B29C41/26 ; G02B5/30 ; G02F1/1335
The present invention relates to a polyvinyl alcohol polymer film and a process for producing the same. The present invention provides a PVA film and a process for film production. The PVA film has satisfactory stretchability and from which a polarizing film can be efficiently produced. The process for film production comprises (a) ejecting a PVA-containing film formation dope in a film form onto the first drying roll of a film formation device equipped with a plurality of drying rolls, partly drying the web, and then successively drying the web with the subsequent drying rolls to produce a film, wherein (b) the ratio of the peripheral speed (ST) of the drying roll on which the volatile content of the PVA film has fallen to 13 mass% to the peripheral speed (S1) of the first drying roll, ST/S1, is regulated to 0.990-1.050, (c) the ratio of the peripheral speed (SL) of the last drying roll to the peripheral speed ST, SL/ST, is regulated to 0.960-0.980, and (d) the SL/S1 ratio is regulated to 0.970-1.010.
公开/授权文献:
- CN104311853B 聚乙烯醇系聚合物薄膜及其制造方法 公开/授权日:2018-05-25
IPC结构图谱:
C | 化学;冶金 |
--C08 | 有机高分子化合物;其制备或化学加工;以其为基料的组合物 |
----C08J | 加工;配料的一般工艺过程;不包括在C08B,C08C,C08F,C08G或C08H小类中的后处理 |
------C08J5/00 | 含有高分子物质的制品或成形材料的制造 |
--------C08J5/18 | .薄膜或片材的制造 |