发明名称 |
Apparatus for making a corrugation-free foam |
摘要 |
A method and apparatus for extruding a corrugation-free polystyrene foam with 100% carbon dioxide as the blowing agent by extruding the extrudate through an annular die opening so that it contacts a choke ring inner surface. A foam made with the apparatus according to the invention will have no visible corrugations and an average cell size of less than 0.35 mm.
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申请公布号 |
US7140865(B2) |
申请公布日期 |
2006.11.28 |
申请号 |
US20020063185 |
申请日期 |
2002.03.28 |
申请人 |
DART CONTAINER CORPORATION |
发明人 |
MYER WAYNE J.;KELLEY BLAINE M. |
分类号 |
B29C47/22;B29C44/50;B29C47/00;B29C47/20;B29C47/90;C08J9/00;C08J9/14 |
主分类号 |
B29C47/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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