发明授权
- 专利标题： Method of determining a thermoforming process window of a thermoplastic material
- 专利标题（中）： 确定热塑性材料的热成型工艺窗口的方法
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申请号： US636747申请日： 1996-04-19
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公开(公告)号： US5709825A公开(公告)日： 1998-01-20
- 发明人: Wayne Ken Shih
- 申请人： Wayne Ken Shih
- 申请人地址： TN Kingsport
- 专利权人： Eastman Chemical Company
- 当前专利权人： Eastman Chemical Company
- 当前专利权人地址： TN Kingsport
- 主分类号： B29C51/00
- IPC分类号： B29C51/00 ; B29C51/08 ; B29C51/46 ; B29K67/00 ; B29K69/00
摘要：
A thermoforming process window of a rectangular sheet of a thermoplastic material is determined by calculating its Sag Number during heating. The Sag Number is a function of the sheets length, width and apex depth at the center of sag. Upon the Sag Number being between 10 and 40, preferably 15 and 35, and more preferably 19 and 28, the sheet is ready for forming into an end product.
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