Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Toshiyuki Edazawa0
Hidefumi Niki0
Date of Patent
April 17, 2007
0Patent Application Number
107312890
Date Filed
December 9, 2003
0Patent Primary Examiner
Patent abstract
A polyvinyl alcohol film roll including a cylindrical core tube made of a metallic material and having a surface roughness of at most 100 S and a polyvinyl alcohol film wound up around the cylindrical core tube, the film roll being obtained by forming the film from a solution of a polyvinyl alcohol resin and winding up the film around the core tube, and the film roll being capable of providing an optically homogeneous polyvinyl alcohol film having an excellent appearance.
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