发明授权
US5772936A Method of reducing pinch deformation and contour lines in polyurethane
molded foam employing timed partial pressure release
失效
使用定时分压释放的聚氨酯模制泡沫中减小夹点变形和轮廓线的方法
- 专利标题： Method of reducing pinch deformation and contour lines in polyurethane molded foam employing timed partial pressure release
- 专利标题（中）： 使用定时分压释放的聚氨酯模制泡沫中减小夹点变形和轮廓线的方法
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申请号： US385409申请日： 1995-02-08
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公开(公告)号： US5772936A公开(公告)日： 1998-06-30
- 发明人: Keith Douglas Cavender
- 申请人： Keith Douglas Cavender
- 申请人地址： DE Greenville
- 专利权人： ARCO Chemical Technology, L.P.
- 当前专利权人： ARCO Chemical Technology, L.P.
- 当前专利权人地址： DE Greenville
- 主分类号： B29C39/02
- IPC分类号： B29C39/02 ; B29C44/34 ; B29K75/00 ; B29K105/04 ; B29C44/02
摘要：
An improved process for cell opening of cellular polyurethane molded foam using timed partial pressure release (TPPR) reduces pinch deformation and contour lines by releasing the internal mold pressure in a curing cellular molded polyurethane foam product in a controlled manner which allows gas to escape from the mold, but which prohibits relative movement of the mold sealing surfaces by more than an imperceptible amount.
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