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发明授权
CN105283396B 聚乙烯醇系薄膜卷和使用其的偏光膜 有权 转让

聚乙烯醇系薄膜卷和使用其的偏光膜
摘要：
本发明提供一种可以得到偏光性能、外观特性优异的偏光膜的聚乙烯醇系薄膜卷，其为能够防止芯管表面的划痕的聚乙烯醇系薄膜卷，解出的薄膜为均质的薄膜。该卷为将光学用聚乙烯醇系薄膜卷取于圆筒状的芯管而得到的聚乙烯醇系薄膜卷，该芯管由铝材形成，进而芯管的表面的维氏硬度(HV)为400以上。
摘要（英）：

Provided is a polyvinyl alcohol film roll which delivers a film of a uniform quality and is capable of providing a polarizing film that has excellent polarization performance and appearance characteristics, and wherein the surface of a core tube can be prevented from being damaged. This polyvinyl alcohol film roll is obtained by winding a polyvinyl alcohol film for optical applications around a cylindrical core tube. The core tube is formed of an aluminum material, and the surface of the core tube has a Vickers hardness (HV) of 400 or more.

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