| 发明名称 |
PAPERMAKING AID |
| 摘要 |
A method of improving drainage rate and retention of fines which is effectiv e in unfilled, newsprint-type furnish without a silica/bentonite-type particle is disclosed. The method comprises adding a cationic or amphoteric starch, a nd a cationic polyelectrolyte followed by the addition of a high molecular weig ht anionic polyacrylamide copolymer.
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| 申请公布号 |
CA2339983(A1) |
申请公布日期 |
2000.03.02 |
| 申请号 |
CA19992339983 |
申请日期 |
1999.08.18 |
| 申请人 |
BETZDEARBORN INC. |
发明人 |
SUTMAN, FRANK J.;HOBIRK, RICHARD A. |
| 分类号 |
D21H21/10;D21H11/08;D21H17/07;D21H17/29;D21H17/37;D21H17/42;D21H17/44;D21H17/45;D21H17/55;D21H17/56;D21H17/66;D21H21/06;D21H23/04;D21H23/14;D21H23/76;(IPC1-7):D21H17/29 |
主分类号 |
D21H21/10 |
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