发明名称 |
Framgangsmåte for framstilling av delignifisert papirfiber fra resirkulert returpapir med höyt lignininnhold |
摘要 |
<p>A method is disclosed for producing, in a continuous throughput, high quality paper from recycled waste paper utilizing high consistency, low shear pulping, followed by a series of cleaning steps to produce a wet, friable pulp which is digested and optionally bleached. The resulting pulp can be run on a paper machine alone or blended with virgin pulp to produce a paper containing at least 5% by weight recycled paper with less than 20 ppm per unit area solid non-fibrous contaminants larger than 0.3 mm<2> , and which may be blade coated on a high speed paper machine.</p> |
申请公布号 |
NO301891(B1) |
申请公布日期 |
1997.12.22 |
申请号 |
NO19930001204 |
申请日期 |
1993.03.31 |
申请人 |
WESTVACO CORP |
发明人 |
HANK, MARK ALAN;MULCAHY, LEO THOMAS;PETERSON, RALPH SCOTT;STREISEL, ROBERT CHARLES |
分类号 |
D21C5/02;D21B1/32;D21D5/00;D21H11/14;D21H19/40;D21H25/10;D21H27/16;(IPC1-7):D21C5/02 |
主分类号 |
D21C5/02 |
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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