发明授权
- 专利标题: Process for draining or smoothing a fibrous pulp web
- 专利标题(中): 排干或平滑纤维纸浆网的方法
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申请号: US09022549申请日: 1998-02-12
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公开(公告)号: US06197157B1公开(公告)日: 2001-03-06
- 发明人: Rudolf Hasenfuss , Joachim Grabscheid , Christian Schiel , Wolfgang Schuwerk
- 申请人: Rudolf Hasenfuss , Joachim Grabscheid , Christian Schiel , Wolfgang Schuwerk
- 优先权: DE19705360 19970212
- 主分类号: D01F304
- IPC分类号: D01F304
摘要:
A press device for draining and/or smoothing, or shaping the surface and controlling the sheet structure of fibrous pulp webs with a surface weight of under 100 g/m2, such as the fibrous pulp webs used to make graphic papers. The device has a press area which includes at least one press nip through which, during operation, the fibrous pulp web is fed at a velocity of at least 1200 m/min, under simultaneous impingement by pressure. The press area includes at least two press zones subsequent to one another. The device is further characterized by a K value of at least 2.5 kPa·s·m. This K value is the product of L1 and Itot. L1 is the length of the first press zone, measured along the direction in which the web runs, and Itot is the total press impulse operating on the fibrous pulp web in the entire press area.
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