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:
Jul. 27, 2010
Filed:
Aug. 16, 2007
Kimito Washiya, Minami-ashigara, JP;
Kimito Washiya, Minami-ashigara, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
A cellulose acylate film producing method of producing cellulose acylate film by casting dope containing cellulose acylate and solvent is provided. The cellulose acylate film producing method includes adding a magnesium salt to the dope to satisfy a condition of a value of M/Mbeing equal to or more than 1×10and equal to or less than 1×10, where Mis a weight of the cellulose acylate, and Mis a weight of magnesium in the magnesium salt. If the dope contains a calcium ion, the magnesium salt suppresses creation of insoluble precipitate of a calcium salt of a fatty acid from a fatty acid ion in the dope. Preferably, the magnesium salt is magnesium sulfate. A value of M/Mis equal to or more than 1×10and equal to or less than 10, where Mis a weight of calcium contained in the dope.