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发明授权
CN104185653B 聚乙烯醇系聚合物膜和偏光膜 有权

聚乙烯醇系聚合物膜和偏光膜
摘要：
提供缺点少而且透明性良好的PVA膜、和由其制造的光透射率提高的高品质的偏光膜。PVA膜和由该PVA膜制造的偏光膜，所述PVA膜包含含有PVA（A）和非离子系表面活性剂（B）的PVA组合物，其中，该PVA组合物中，非离子系表面活性剂（B）的含量相对于PVA（A）100质量份为0.02～1质量份，并且选自碱金属和碱土类金属中的至少1种金属（C）的含量相对于PVA（A）以质量基准计为100ppm以下；和由该PVA膜制造的偏光膜。
摘要（英）：

[Problem] To provide: a PVA film having little disadvantages and good transparency; and a high-quality polarizing film produced from the PVA film and having improved light transmittance. [Solution] A PVA film produced from a PVA composition comprising PVA (A) and a nonionic surfactant (B), wherein the content of the nonionic surfactant (B) is 0.02 to 1 part by mass relative to 100 parts by mass of PVA (A) and the content of at least one metal (C) selected from the group consisting of alkali metals and alkali earth metals is 100 ppm or less relative to the mass of PVA (A) in the PVA composition; and a polarizing film produced from the PVA film.

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