发明名称 |
COMPOSITION AND PROCESS FOR INCREASING THE DRY STRENGTH OF A PAPER PRODUCT |
摘要 |
A dry strength additive composition generally includes an anionic and/or amphoteric polyacrylamide having a molecular weight of less than 1,000,000 Daltons, wherein the amphoteric polyacrylamide has a net negative charge; a cationic and/or amphoteric starch; and a cationic non-starch polymer having a charge density greater than 1 milliequivalent per gram (meq/g) at a pH of 3. The components defining the composition can be added to a pulp suspension sequentially or as a pre-blended mixture. |
申请公布号 |
EP2640895(A1) |
申请公布日期 |
2013.09.25 |
申请号 |
EP20110791100 |
申请日期 |
2011.11.07 |
申请人 |
KEMIRA OYJ |
发明人 |
LU, CHEN;GRIGORIEV, VLADIMIR;ROSENCRANCE, SCOTT |
分类号 |
D21H21/18 |
主分类号 |
D21H21/18 |
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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