Title:
PAPER AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/054399
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide: high-quality paper using kraft pulp as a raw material; and a production method therefor. That is, the present invention provides: paper including kraft pulp as a paper raw material and having a predetermined relationship between density and breaking length or between density and flexural rigidity; and a method for producing said paper using kraft pulp as a paper raw material. The kraft pulp is preferably obtained by performing kraft pulp digestion on a wood raw material having a bulk density of at least 635 kg/m3 and a fiber length of at most 1.1 mm. The kraft pulp digestion is preferably performed under the condition of an active alkali addition ratio of 5-40%.
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Inventors:
MIYAUCHI KENSHIRO (JP)
IWATA EIJI (JP)
TAKAYAMA MASATO (JP)
IWATA EIJI (JP)
TAKAYAMA MASATO (JP)
Application Number:
PCT/JP2022/036025
Publication Date:
April 06, 2023
Filing Date:
September 27, 2022
Export Citation:
Assignee:
JUJO PAPER CO LTD (JP)
International Classes:
D21H11/04
Foreign References:
| US4216054A | 1980-08-05 | |||
| JPS5679797A | 1981-06-30 | |||
| JP2011524476A | 2011-09-01 | |||
| JP2003528989A | 2003-09-30 | |||
| JP2007236328A | 2007-09-20 | |||
| JP2016191184A | 2016-11-10 | |||
| US20010040015A1 | 2001-11-15 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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