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1. 发明申请

WO1998027276A1 USING CENTRIFUGAL PUMPS IN THE FOAM PROCESS OF PRODUCING NON-WOVEN WEBS 审中-公开
标题翻译：在生产非织造布的泡沫过程中使用离心泵
公开(公告)号：WO1998027276A1
公开(公告)日：1998-06-25
申请号：PCT/FI1997000804
申请日：1997-12-18
申请人： AHLSTROM PAPER GROUP OY
发明人： AHLSTROM PAPER GROUP OY , ELONEN, Jorma , JANSSON, Juhani , KOSO, Arto , RÖKMAN, Kay
IPC分类号： D21F11/00
CPC分类号： D21F11/002 , B01D19/0052
摘要： A non-woven web of fibrous material is produced using a moving foraminous element in the practice of the foam process. A first foam slurry of air, water, fibers and a surfactant is generated and centrifugally pumped into contact with the moving foraminous element. Substantially fiber-free foam is withdrawn from the foraminous element while forming a non-woven web of fibrous material on the foraminous element, and at least a part of the substantially fiber-free foam is used in the generation of the first foam slurry. Recycling is also typically practiced using a centrifugal pump, and the centrifugal pumps are preferably degassing pumps which remove some of the gas from the foam. By practicing the invention it is possible to produce fibrous webs using the foam process that are more than two meters wide, and at a forming speed of more than about 100 m/min (e.g. about 200-500 m/min).
摘要翻译：在泡沫过程的实践中，使用移动的有孔元素制造纤维材料的无纺网。产生空气，水，纤维和表面活性剂的第一泡沫浆料并离心泵送与移动的有孔元素接触。在多孔元素上形成纤维材料的无纺织物网时，从多孔元素中取出基本上无纤维的泡沫，并且在产生第一泡沫浆料中使用至少一部分基本上不含纤维的泡沫。回收也通常使用离心泵进行，离心泵优选是脱泡泵，其从泡沫中去除一些气体。通过实施本发明，可以使用超过两米宽并且成形速度大于约100m / min（例如约200-500m / min）的泡沫工艺来生产纤维网。

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