Title:
CELLULOSE NANOFIBER MANUFACTURING METHOD AND CELLULOSE NANOFIBER
Document Type and Number:
WIPO Patent Application WO/2021/124655
Kind Code:
A1
Abstract:
Provided is a cellulose nanofiber manufacturing method which is less likely to cause concerns in terms of safety and the environment, and by which a high-quality cellulose nanofiber can be manufactured. This manufacturing method is for manufacturing a cellulose nanofiber from a pulp fiber. The manufacturing method comprises: ozone treatment step S31 for performing an ozone treatment on a pulp fiber, in a first aqueous solution; and defibration treatment step S32 for performing a physical defibration treatment on the ozone-treated pulp fiber, in a second aqueous solution. In the manufacturing method, the ozone treatment step and the defibration treatment step are continuously performed a plurality of times to form the cellulose nanofiber having a hemicellulose content of less than 8.0 mass% and a lignin content of at most 0.10 mass%.
Inventors:
KONISHI TAKAYOSHI (JP)
BANDOH TAKESHI (JP)
YAMAKI KOUICHI (JP)
KURITA NORITOMO (JP)
BANDOH TAKESHI (JP)
YAMAKI KOUICHI (JP)
KURITA NORITOMO (JP)
Application Number:
PCT/JP2020/038368
Publication Date:
June 24, 2021
Filing Date:
October 09, 2020
Export Citation:
Assignee:
UNICHARM CORP (JP)
International Classes:
C08B15/02; D21H11/18; D21H11/20; D21H15/02
Domestic Patent References:
| WO2019003655A1 | 2019-01-03 | |||
| WO2020141589A1 | 2020-07-09 | |||
| WO2020096013A1 | 2020-05-14 |
Foreign References:
| JP2010254726A | 2010-11-11 | |||
| JP2012193353A | 2012-10-11 | |||
| JP2019131725A | 2019-08-08 | |||
| JP2018100474A | 2018-06-28 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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