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:
Jun. 22, 2010
Filed:
Mar. 20, 2007
Koji Tasaka, Tokyo, JP;
Hiroki Umeda, Tokyo, JP;
Noriyasu Kuzuhara, Tokyo, JP;
Takatoshi Yajima, Tokyo, JP;
Koji Tasaka, Tokyo, JP;
Hiroki Umeda, Tokyo, JP;
Noriyasu Kuzuhara, Tokyo, JP;
Takatoshi Yajima, Tokyo, JP;
Konica Corporation, Tokyo, JP;
Abstract
A manufacturing method of a cellulose ester film satisfying the relationships, Nx>Ny>Nz, and 0.8≦R/R≦3.5, the method comprising casting a cellulose ester dope containing a solvent of a good solvent and a poor solvent on a support to form a web; peeling the web from the support; transporting the peeled web (step D); holding the edges in the transverse direction of the web (step A); stretching the resulting web in the transverse direction while applying a tension; reducing the tension in the transverse direction of the web; and drying the stretched web, wherein the residual solvent content of the web is 5 to 90% by weight at the beginning in the step A, and the residual poor solvent content in the residual solvent content of the web is from 15 to 95% by weight at the terminal point in the Step D