Title:
METHOD FOR PRODUCING SOFTWOOD-DERIVED PULP FIBERS FOR PAPER AND SOFTWOOD-DERIVED PULP FIBERS FOR PAPER
Document Type and Number:
WIPO Patent Application WO/2020/246137
Kind Code:
A1
Abstract:
Provided is a method for producing softwood-derived pulp fibers for paper, the method being capable of reducing the propensity for the product surface to become rough, and capable of reducing the propensity for the tensile strength to be reduced. This production method is for producing softwood-derived pulp fibers for paper, the method comprising a beating step (S31) in which material pulp fibers derived from softwood are beaten in the presence of a liquid including water, and an ozone treatment step (S33) in which the material pulp fibers that have been beaten are treated with ozone water.
Inventors:
BANDOU TAKESHI (JP)
KONISHI TAKAYOSHI (JP)
KONISHI TAKAYOSHI (JP)
Application Number:
PCT/JP2020/016040
Publication Date:
December 10, 2020
Filing Date:
April 09, 2020
Export Citation:
Assignee:
UNICHARM CORP (JP)
International Classes:
D21B1/14; D21C5/02; D21C9/153; D21H11/14
Foreign References:
| CN102978984A | 2013-03-20 | |||
| JP2000282384A | 2000-10-10 | |||
| JPS54131005A | 1979-10-11 | |||
| US20190078259A1 | 2019-03-14 | |||
| US20050061455A1 | 2005-03-24 | |||
| JP2003278087A | 2003-10-02 | |||
| JPS5624694B2 | 1981-06-08 |
Other References:
See also references of EP 3957793A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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