The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 2011
Filed:
Jun. 06, 2007
Zemin Shi, Minami-ashigara, JP;
Kazuhiro Ono, Minami-ashigara, JP;
Zemin Shi, Minami-ashigara, JP;
Kazuhiro Ono, Minami-ashigara, JP;
Fujifilm Corporation, Minato-Ku, Tokyo, JP;
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.≦1° C.  (1)0.1 cm≦Q≦8 cm  (2) The method provides a thermoplastic film having high thickness accuracy and surface smoothness.