发明授权
US5069857A Process for the production of molded articles by deep-drawing
prefabricated polyurethane(urea) parts or by pressing fragmented
polyurethane(urea) material
失效
通过深冲预制的聚氨酯（尿素）部件或压制片断的聚氨酯（尿素）材料来生产模制品的方法
- 专利标题： Process for the production of molded articles by deep-drawing prefabricated polyurethane(urea) parts or by pressing fragmented polyurethane(urea) material
- 专利标题（中）： 通过深冲预制的聚氨酯（尿素）部件或压制片断的聚氨酯（尿素）材料来生产模制品的方法
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申请号： US605600申请日： 1990-10-29
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公开(公告)号： US5069857A公开(公告)日： 1991-12-03
- 发明人: Joachim Wagner , Thomas Elsner , Werner Rasshofer , Jurgen Faehndrich , Eberhard Jurgens
- 申请人： Joachim Wagner , Thomas Elsner , Werner Rasshofer , Jurgen Faehndrich , Eberhard Jurgens
- 申请人地址： DEX Bayerwerk
- 专利权人： Bayer Aktiengesellschaft
- 当前专利权人： Bayer Aktiengesellschaft
- 当前专利权人地址： DEX Bayerwerk
- 优先权： DEX3936294 19891101; DEX4030282 19900925
- 主分类号： B29C51/08
- IPC分类号： B29C51/08 ; B29C43/00 ; B29C51/00 ; B29C67/24 ; B29K75/00
摘要：
The invention is directed to a process for the production of molded articles by deep-drawing a prefabricated polyurethane(urea) part produced from a polyisocyanate polyaddition product having a specific gravity of at least 0.8 g/cm.sup.3. The part is placed inside a deep-drawing mold and pressed at a temperature of up to 230.degree. C. and a pressure of up to 1,000 bar. After the deep-drawing process, the part is subjected to a dwell time of at least 10 seconds at a temperature of up to 230.degree. C. and a pressure of up to 1,000 and is immediately thereafter removed from the mold.
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