发明名称 |
Manufacture of paper and paperboard. |
摘要 |
According to the present invention a process is provided for making paper or paper board comprising forming a cellulosic suspension, flocculating the suspension, draining the suspension on a screen to form a sheet and then drying the sheet, characterised in that the suspension is flocculated using a flocculation system comprising a siliceous material and organic microparticies which have an unswollen particle diameter of less than 750 nanometers. |
申请公布号 |
ZA200302614(B) |
申请公布日期 |
2004.04.15 |
申请号 |
ZA20030002614 |
申请日期 |
2003.04.03 |
申请人 |
CIBA SPECIALTY CHEMICALS WATER TREATMENTS LIMITED |
发明人 |
CHEN, GORDON, CHENG, I;RICHARDSON, GARY, PETER |
分类号 |
D21F11/00;D21H17/13;D21H17/68;D21H21/10;D21H21/52;D21H21/54;D21H23/14;D21H23/76 |
主分类号 |
D21F11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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