发明名称 |
Polyimide film and process for producing the same |
摘要 |
A polyimide film having a biaxial optical anisotropy and excellent durability is provided. A solution of polyimide having an imidization ratio of 98% to 100% is applied onto a plastic base, and then the solution is dried, thus forming a polyimide coating. Subsequently, the polyimide coating is stretched together with the plastic base so as to satisfy nx>ny>nz, wherein nx and ny indicate a refractive index in a direction exhibiting a maximum refractive index within a plane and that in a direction perpendicular thereto and nz indicates a refractive index in a thickness direction.
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申请公布号 |
US2005221023(A1) |
申请公布日期 |
2005.10.06 |
申请号 |
US20040518079 |
申请日期 |
2004.12.16 |
申请人 |
SAKAMOTO MICHIE;NISHIKOUJI YUUICHI;MURAKAMI NAO;HAYASHI MASAKI |
发明人 |
SAKAMOTO MICHIE;NISHIKOUJI YUUICHI;MURAKAMI NAO;HAYASHI MASAKI |
分类号 |
B29C41/28;B29C55/04;C08J7/04;G02F1/13363;(IPC1-7):C09K19/00 |
主分类号 |
B29C41/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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