发明名称 |
METHOD FOR MAKING PAPER AND CARDBOARD AND RETENTION AND DEWATERING AGENTS |
摘要 |
The invention concerns an improved method for making paper which consists in using as main retention agent a branched polymer prepared in invert emulsion and bentonite as secondary retention agent (dual type system). The two additions are separated by a step for shearing the fibrous suspension (or mass). The invention enables to obtain a highly improved retention and also highly improved dewatering. Moreover, it enables to reduce the bentonite content in the white water.
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申请公布号 |
WO9963159(A1) |
申请公布日期 |
1999.12.09 |
申请号 |
WO1999FR01278 |
申请日期 |
1999.06.01 |
申请人 |
SNF S.A.;HUND, RENE;JEHN-RENDU, CHRISTIAN |
发明人 |
HUND, RENE;JEHN-RENDU, CHRISTIAN |
分类号 |
D21H17/37;D21H17/68;D21H21/10;D21H23/14;D21H23/76;(IPC1-7):D21H23/76 |
主分类号 |
D21H17/37 |
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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