Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Toshihiko Suzuki0
Hiroaki Takahata0
Kyoko Hino0
Date of Patent
June 29, 2010
0Patent Application Number
122933470
Date Filed
March 23, 2007
0Patent Primary Examiner
Patent abstract
The present invention provides a method for producing a retardation film of a polypropylene resin, the method comprising subjecting a film of a polypropylene resin to longitudinal stretching and transverse stretching which are performed sequentially, wherein the transverse stretching comprises the following steps, and a polypropylene resin retardation film which is obtained by such a method and has both a high axial retardation and a uniform retardation:
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