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. 17, 2012
Filed:
Jul. 07, 2011
Tadashi Ueda, Fujinomiya, JP;
Tadashi Ueda, Fujinomiya, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
There is provided a method for producing a cellulose resin film, with which the deterioration of the entire film and the occurrence of die lines can be prevented. The method for producing a cellulose resin film, including the steps of: discharging two cellulose resins A and B molten in the respective extruders in the form of an A/B/A three-layer sheet from a die upon a support by co-extrusion; and cooling and solidifying the sheet-shaped molten resin into a film, wherein the resin A, which forms a pair of outer layers of the A/B/A three-layer sheet, has a number average molecular weight smaller than that of the resin B, which forms the inner layer of the A/B/A three-layer sheet, and the resin A has a number average molecular weight of 20,000 or more and 50,000 or less, and the resin B has a number average molecular weight of 30,000 or more and 100,000 or less.