Title:
CELLULOSE NANOFIBER MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2019/181838
Kind Code:
A1
Abstract:
Provided is a manufacturing method for obtaining cellulose nanofibers by refining pulp fibers, the cellulose nanofiber manufacturing method making it possible to obtain cellulose nanofibers in which a decrease in the molecular weight of cellulose is suppressed and which provide excellent strength and the like. The present invention provides a cellulose nanofiber manufacturing method comprising: a step of subjecting pulp fibers in a slurry to preprocessing; and a step of refining, using a high-pressure homogenizer, the pulp fibers in the slurry that has been subjected to preprocessing. A weight-average molecular weight of the cellulose of the cellulose nanofibers obtained through the refining step to a weight-average molecular weight of the cellulose of the pulp fibers prior to the preprocessing step is not less than 65%.
Inventors:
OKAWA JUNYA (JP)
Application Number:
PCT/JP2019/011135
Publication Date:
September 26, 2019
Filing Date:
March 18, 2019
Export Citation:
Assignee:
DAIO SEISHI KK (JP)
International Classes:
D21H11/18; C08B1/00; C08B15/08; D01F2/00
Domestic Patent References:
| WO2007088974A1 | 2007-08-09 | |||
| WO2018037646A1 | 2018-03-01 | |||
| WO2009069641A1 | 2009-06-04 |
Foreign References:
| JP2018003216A | 2018-01-11 | |||
| JP2017008472A | 2017-01-12 | |||
| JP2005270891A | 2005-10-06 | |||
| JP2017095831A | 2017-06-01 | |||
| JP6310044B1 | 2018-04-11 | |||
| JP2005270891A | 2005-10-06 | |||
| JP2008001728A | 2008-01-10 | |||
| JP2010235679A | 2010-10-21 |
Other References:
See also references of EP 3770321A4
Attorney, Agent or Firm:
AMANO Kazunori (JP)
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