发明名称 |
METHOD FOR OPERATING A SHEET-FORMING UNIT, AND SHEET FORMING UNIT |
摘要 |
A method for operating a sheet-forming unit of a papermaking machine. At least one fibrous material suspension is fed to a headbox and is conducted in a plurality of turbulence-generating channels to form sub-flows, and fed to a nozzle. From the nozzle, the at least one fibrous material suspension is in the form of a free jet into the forming unit to define an impingement line. In a final fluidization region of an individual turbulence-generating channel a pressure loss (Δp) of≧50 mbar is generated within the fibrous material suspension before inlet thereof into the nozzle, and the fibrous material suspension is guided from the final fluidization region as far as the impingement line in such a way that the dwell time of the suspension in the region defined by the final fluidization region as far as the impingement line ranges from >30 ms to≰300 ms.
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申请公布号 |
US2012193059(A1) |
申请公布日期 |
2012.08.02 |
申请号 |
US201213370697 |
申请日期 |
2012.02.10 |
申请人 |
HAEUSSLER MARKUS;LOSER HANS;SCHMIDT-ROHR VOLKER;RUF WOLFGANG;RUEHL THOMAS |
发明人 |
HAEUSSLER MARKUS;LOSER HANS;SCHMIDT-ROHR VOLKER;RUF WOLFGANG;RUEHL THOMAS |
分类号 |
D21F1/00 |
主分类号 |
D21F1/00 |
代理机构 |
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代理人 |
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