发明名称 |
Production of paper and paper board |
摘要 |
Paper or paper board is made by adding cationic polymeric retention aid to a cellulosic supension, shearing the suspension to degrade the resultant flocs, aggregating the suspension by adding an aqueous composition of bentonite or other anionic bridging coagulant in the presence of anionic dye, pigment or optical brightening agent, and forming paper from the aggregated suspension.
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申请公布号 |
US6063240(A) |
申请公布日期 |
2000.05.16 |
申请号 |
US19970980372 |
申请日期 |
1997.11.28 |
申请人 |
ALLIED COLLOIDS LIMITED;AB CDM |
发明人 |
ERIKSSON, PER-OLA;ERIKSSON, INGVAR;HJALMARSON, BO;LANGLEY, JOHN GRAHAM |
分类号 |
D21H17/29;D21H17/45;D21H17/55;D21H17/56;D21H17/68;D21H21/10;D21H21/28;D21H21/30;D21H23/14;(IPC1-7):D21H11/00;D21H13/00 |
主分类号 |
D21H17/29 |
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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