Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Zemin Shi0
Kazuhiro Ono0
Date of Patent
August 9, 2011
0Patent Application Number
118081010
Date Filed
June 6, 2007
0Patent Primary Examiner
Patent abstract
A method for producing a thermoplastic film, comprising cooling and solidifying a filmy thermoplastic melt resin, by holding it between a metallic presser and a metallic casting roll for cooling; wherein the temperature of the filmy thermoplastic resin just before being held between the metallic presser and the casting roll for cooling is from Tg+20° C. to Tg+90° C. and a difference between a surface temperature (Tt) of the metallic presser and a surface temperature (T1) of the casting roll for cooling satisfies the formula (1) and a contact length Q satisfies the following formula (2)0.5° C.≦T1−Tt≦20° C. (1)0.1 cm≦Q≦8 cm (2)
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