Title:
METHOD FOR PRODUCING PULP FIBER RAW MATERIAL, AND PULP FIBER RAW MATERIAL AS CELLULOSE RAW MATERIAL
Document Type and Number:
WIPO Patent Application WO/2020/141589
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a method for producing a pulp fiber raw material suitable as a cellulose raw material. This invention is as follows. A method for producing pulp fiber raw material as a cellulose raw material from pulp fiber to be treated, characterized by involving an ozone treatment step (S36) in which, by supplying an ozone-containing gas to a treatment tank containing a treatment liquid that contains pulp fiber inclusions containing pulp fibers to be treated, ozone-treated pulp fibers are formed from the pulp fibers to be treated, and an alkali treatment step (S39) for treating the aforementioned ozone-treated pulp fibers with an alkaline aqueous solution to form the aforementioned pulp fiber raw material having a hemicellulose content ratio less than 8.0 mass%.
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Inventors:
KONISHI TAKAYOSHI (JP)
BANDOU TAKESHI (JP)
KURITA NORITOMO (JP)
BANDOU TAKESHI (JP)
KURITA NORITOMO (JP)
Application Number:
PCT/JP2019/050212
Publication Date:
July 09, 2020
Filing Date:
December 20, 2019
Export Citation:
Assignee:
UNICHARM CORP (JP)
International Classes:
D21C5/02; A61L2/18; B09B3/00; C08J11/16; D21B1/32; A61L101/10
Foreign References:
| JP2002533587A | 2002-10-08 | |||
| JP2003523484A | 2003-08-05 | |||
| JP2012205680A | 2012-10-25 | |||
| JP2016000881A | 2016-01-07 | |||
| JP2015206139A | 2015-11-19 | |||
| US20150225901A1 | 2015-08-13 | |||
| JP2016000881A | 2016-01-07 | |||
| JP2010235681A | 2010-10-21 | |||
| JP2010254726A | 2010-11-11 | |||
| JPH10251301A | 1998-09-22 | |||
| JP2018064514A | 2018-04-26 | |||
| JP2015517303A | 2015-06-22 |
Other References:
See also references of EP 3885488A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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