Title:
PRODUCTION METHOD OF PULP FIBER FOR MAKING CELLULOSE NANOFIBER AND PULP FIBER FOR MAKING CELLULOSE NANOFIBER
Document Type and Number:
Japanese Patent JP2019005733
Kind Code:
A
Abstract:
To provide a production method of a pulp fiber for making a cellulose nanofiber having a low lignin content, having its small distribution and being excellent in cellulose nanofiber-making property from used sanitary articles.SOLUTION: In a production method of a pulp fiber for making a cellulose nanofiber including: a step supplying a mixed liquid 51 containing a used sanitary article-derived superabsorbent polymer and the pulp fiber to a treatment tank 31 from a mixed liquid supply port 32; a step supplying an ozone-containing gas 53 into a treatment liquid 52 in the treatment tank 31 from an ozone-containing gas supply port 43; a step forming the pulp fiber for making the cellulose nanofiber from the pulp fiber by ascending the ozone-containing gas 53 while descending the superabsorbent polymer and the pulp fiber in the treatment tank 31 and bringing the ozone-containing gas 53 into contact with the superabsorbent polymer and the pulp fiber; and a step discharging the treatment liquid 52 from a treatment liquid discharge port 33, the lignin content of the pulp fiber for making the cellulose nanofiber is 0.1 mass% or less.SELECTED DRAWING: Figure 2
Inventors:
KONISHI TAKAYOSHI
HIRAOKA TOSHIO
KURITA NORITOMO
HIRAOKA TOSHIO
KURITA NORITOMO
Application Number:
JP2017126793A
Publication Date:
January 17, 2019
Filing Date:
June 28, 2017
Export Citation:
Assignee:
UNI CHARM CORP
International Classes:
B09B3/00; A61L2/18; A61L11/00; D21C5/02
Domestic Patent References:
| JP2014176510A | 2014-09-25 | |||
| JP2017100133A | 2017-06-08 | |||
| JP2000084533A | 2000-03-28 |
Foreign References:
| WO2015190140A1 | 2015-12-17 |
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Atsushi Ebiya
Hiroyuki Onoda
Okuno Takenori
Kenji Fujimoto
Takashi Ishida
Tetsuji Koga
Atsushi Ebiya
Hiroyuki Onoda
Okuno Takenori
Kenji Fujimoto