发明名称 |
RETARDATION FILM AND METHOD FOR PRODUCTION THEREOF |
摘要 |
Disclosed is a method for production of a retardation film made of a polypropylene resin. The method comprises subjecting a film made of a polypropylene resin to the stretching in the machine direction and the stretching in the transverse direction successively, wherein the stretching in the transverse direction comprises the following steps: preheating the film at a preheating temperature higher than the melting point of the polypropylene resin; stretching the preheated film in the transverse direction at a stretching temperature lower than the preheating temperature; and thermofixing the transversally stretched film. Also disclosed is a retardation film made of a polypropylene resin, which has a high axis accuracy and a uniform phase difference. The retardation film can be produced by the method. ® KIPO & WIPO 2009 |
申请公布号 |
KR20080111083(A) |
申请公布日期 |
2008.12.22 |
申请号 |
KR20087025704 |
申请日期 |
2007.03.23 |
申请人 |
SUMITOMO CHEMICAL CO., LTD. |
发明人 |
HINO KYOKO;SUZUKI TOSHIHIKO;TAKAHATA HIROAKI |
分类号 |
B29C55/14;G02F1/13363 |
主分类号 |
B29C55/14 |
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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