The hydrodynamics of formation improvement by blades in twin-wire formers

被引：0
|
作者：
Kerekes, R. J. [1 ]
Dalpke, B. [2 ]
Jong, J. H. [2 ]
机构：
[1] Univ British Columbia, Ctr Pulp & Paper, Vancouver, BC V6T 1Z4, Canada
[2] FPInnovat Paprican, Vancouver, BC V6S 2L9, Canada
来源：
JOURNAL OF PULP AND PAPER SCIENCE | 2007年 / 33卷 / 04期
关键词：
twin wire machines; blades; hydrodynamics; formation; machine design;
D O I：
暂无
中图分类号：
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号：
0805 ; 080502 ; 0822 ;
摘要：
A mechanistic model of formation improvement in paper caused by blades in twin-wire formers has been developed. Hydrodynamic stresses and strains have been linked to strain of fibre flocs and the consequent displacement of fibres relative to,forming fabrics. The model takes into account the unique conditions in typical gaps, namely the smallness of the gap size relative to fibre length, consistency gradient in the z direction, fibre type, and machine conditions such as fabric tension, speed and angle of wrap. Estimates from the analysis are shown to be consistent with experimental observations.
引用
收藏
页码：183 / 188
页数：6
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