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:
Feb. 20, 2024
Filed:
Mar. 18, 2019
Daio Paper Corporation, Shikokuchuo, JP;
Junya Okawa, Shikokuchuo, JP;
DAIO PAPER CORPORATION, Shikokuchuo, JP;
Abstract
Provided is a method for producing cellulose nanofibers by refining pulp fibers, wherein the method enables obtaining cellulose nanofibers in which a decrease in a molecular weight of cellulose is suppressed, and which can demonstrate superior strength and the like. The present invention is a method for producing cellulose nanofibers, the method including: pretreating pulp fibers in a slurry; and refining, using a high-pressure homogenizer, the pulp fibers in the slurry, the pulp fibers being pretreated, wherein a weight average molecular weight of cellulose of cellulose nanofibers obtained through the refining is 65% or more of a weight average molecular weight of cellulose of the pulp fibers before the pretreating.