发明授权
US06497789B1 Method for making tissue sheets on a modified conventional wet-pressed machine
有权
在改进的常规湿式压榨机上制造薄页纸的方法
- 专利标题: Method for making tissue sheets on a modified conventional wet-pressed machine
- 专利标题(中): 在改进的常规湿式压榨机上制造薄页纸的方法
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申请号: US09607711申请日: 2000-06-30
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公开(公告)号: US06497789B1公开(公告)日: 2002-12-24
- 发明人: Michael Alan Hermans , Frank Stephen Hada , Steven Jack Hickey
- 申请人: Michael Alan Hermans , Frank Stephen Hada , Steven Jack Hickey
- 主分类号: D21F1100
- IPC分类号: D21F1100
摘要:
A tissue sheet is made using a modified wet pressing machine in a modified wet pressing process employing an integrally sealed air press. After initial formation and conventional vacuum dewatering, the wet web is conformed to the surface contour of a relatively coarse fabric to give the web a textured surface. By creating a pressure differential across the web of at least 30 inches of mercury and an air stream through the web of at least 500 SCFM/in2, the air press noncompressively dewaters the wet web to a consistency of about 30 to about 40 percent prior to a heated drying cylinder. The web is dried to substantially preserve its three-dimensional, throughdried-like texture. The process provides a web having an exceptionally high degree of bulk and absorbency not expected in wet-pressed products.