Title:
A PAPERMAKING PROCESS OF INCREASING ASH CONTENT OF A PAPER PRODUCT AND A PAPER PRODUCT OBTAINED BY THE SAME
Document Type and Number:
WIPO Patent Application WO/2016/082642
Kind Code:
A1
Abstract:
Provided is a papermaking process of increasing ash content of a paper product, comprising: adding a flocculant to a mixture comprising filler particles and water, wherein the flocculant has a reduced specific viscosity of 5-16dL/g, a molecular weight of greater than or equal to 1,200,000 and less than or equal to 7,500,000, and 5-50mol% of cationic charge; whereby a size distribution of a flocs formed by a flocculation of the filler particles and the flocculant has a median particle size in a range of 10μm to 150μm; wherein the filler is not precipitated calcium carbonate alone. Also provided is a rotating mixing apparatus used in the papermaking process.
Inventors:
RAO QINGLONG (CN)
ZHAO YULIN (CN)
CHENG WEIGUO (US)
ASHTON STEPHEN B (GB)
TODOROVIC ALEKSANDAR (FI)
SMITH ALAN (GB)
ZHAO YULIN (CN)
CHENG WEIGUO (US)
ASHTON STEPHEN B (GB)
TODOROVIC ALEKSANDAR (FI)
SMITH ALAN (GB)
Application Number:
PCT/CN2015/092948
Publication Date:
June 02, 2016
Filing Date:
October 27, 2015
Export Citation:
Assignee:
ECOLAB USA INC (US)
International Classes:
D21H17/67; C08K9/08; C09C3/10; D21H21/00
Foreign References:
| CN103966895A | 2014-08-06 | |||
| CN104053836A | 2014-09-17 | |||
| JP2004100119A | 2004-04-02 | |||
| CN101802304A | 2010-08-11 | |||
| CN101736656A | 2010-06-16 | |||
| CN101952512A | 2011-01-19 |
Other References:
See also references of EP 3224412A4
Attorney, Agent or Firm:
AFD CHINA INTELLECTUAL PROPERTY LAW OFFICE (8 Xue Qing Rd.Haidian, Beijing 2, CN)
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