发明名称 |
Method for producing pulp and paper with calcium carbonate filler |
摘要 |
A method is described for attaining high levels of loading of calcium carbonate fillers in the lumens of wood pulp fibers. The pulp is pretreated with a cationic polymer prior to being impregnated with the filler. Different conditions of pH and temperature are specified depending on whether the filler is a precipitated calcium carbonate or a ground calcium carbonate. The lumen-loaded pulps are used to make novel products with advantages in higher filler retention and sheet strength over conventionally made papers.
|
申请公布号 |
US6235150(B1) |
申请公布日期 |
2001.05.22 |
申请号 |
US19990271921 |
申请日期 |
1999.03.18 |
申请人 |
PULP AND PAPER RESEARCH INSTITUTE OF CANADA |
发明人 |
MIDDLETON STEVEN R.;DESMEULES JOSéE;SCALLAN ANTHONY M. |
分类号 |
D21C9/00;D21H17/64;D21H17/67;(IPC1-7):D21H17/67 |
主分类号 |
D21C9/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|