Title:
PAPER AND PAPERBOARD PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2019/239819
Kind Code:
A1
Abstract:
A paper and paperboard production method: which comprises a papermaking step, which uses a paper stock with a cationic demand of at least 100 μeq/L for the papermaking feedstock; and in which a 200-1000 μeq/g cation charge density, 2.7-18.3 dL/g intrinsic viscosity η cationic polyacrylamide is added to the paper stock in a range of 0.005-0.1 mass% with respect to the total solids of the paper stock.
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| WO/2015/164685 | ABRASIVE BACKERS AND METHODS OF THEIR FORMATION |
Inventors:
FUKUDA CHISE (JP)
CHEN JIAYI (JP)
CHEN JIAYI (JP)
Application Number:
PCT/JP2019/020048
Publication Date:
December 19, 2019
Filing Date:
May 21, 2019
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
D21H17/37; D21H21/10; C08F20/56
Foreign References:
| JPH026683A | 1990-01-10 | |||
| JP2015105443A | 2015-06-08 | |||
| JP2004300635A | 2004-10-28 | |||
| JP2006182816A | 2006-07-13 | |||
| JPH06329866A | 1994-11-29 | |||
| JP2003504476A | 2003-02-04 |
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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