发明名称 |
PAPER AND PAPERBOARD PRODUCTION PROCESS AND CORRESPONDING NOVEL RETENTION AND DRAINAGE AIDS, AND PAPERS AND PAPERBOARDS THUS OBTAINED |
摘要 |
The invention concerns an improved method for making paper, which uses a branched polymer prepared in invert emulsion as the main retention agent, and bentonite as a secondary retention agent (dual type system). The two additions are separated by a step for shearing the fibrous suspension (or mass). The invention results in highly improved retention and also highly improved dewatering. Moreover, it enables the bentonite content in white water to be reduced.
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申请公布号 |
US2009283232(A1) |
申请公布日期 |
2009.11.19 |
申请号 |
US20090511044 |
申请日期 |
2009.07.28 |
申请人 |
SNF SA |
发明人 |
HUND RENE';JEHN-RENDU CHRISTIAN |
分类号 |
D21H17/37;C08F220/56;D21H17/68;D21H21/10;D21H23/14;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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