Title:
セルロースナノファイバーの製造方法
Document Type and Number:
Japanese Patent JP6784709
Kind Code:
B2
Abstract:
Provided is a method for producing cellulose nanofibers capable of providing a low-viscosity cellulose nanofiber dispersion liquid and having stable quality less prone to coloring even after being heated. The present invention provides a method for producing cellulose nanofibers having a number-average fiber length of not more than 500 µm and a number-average fiber diameter of not more than 100 nm, the method comprising a step (1) for preparing a pulp derived from wood, and a step (2) for defibrating said pulp, wherein when the wood is made into a pulp under a Kraft pulp producing condition in which the added amount of active alkali is 15%, the sulfidity is 25%, liquid ratio is 2.5 L/kg, and the H-factor is 830, the resultant pulp has a fiber length distribution in that the percentage of components having a fiber length of not less than 1.00 mm as measured according to ISO 16065-2 is not more than 20%.
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Inventors:
Naoyuki Tamura
Haruo Kanano
Haruo Kanano
Application Number:
JP2018003215A
Publication Date:
November 11, 2020
Filing Date:
January 12, 2018
Export Citation:
Assignee:
NIPPON PAPER INDUSTRIES CO.,LTD.
International Classes:
D21H11/18; D21H11/04; D21H15/02
Domestic Patent References:
| JP2012207133A | ||||
| JP2012046846A | ||||
| JP2011236398A |
Foreign References:
| WO2011118748A1 | ||||
| WO2015068818A1 |
Attorney, Agent or Firm:
Osamu Yamamoto
Shinjiro Ono
Mitsutoshi Nakamura
Yuki Ogasawara
Noriyuki Arai
Shinjiro Ono
Mitsutoshi Nakamura
Yuki Ogasawara
Noriyuki Arai