| 发明名称 |
APPARATUS AND PROCESS FOR MAKING A CORRUGATION-FREE FOAM |
| 摘要 |
<p>A method and apparatus for extruding a corrugation-free polystyrene foam wi th 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 a n average cell size of less than 0.35 mm.</p> |
| 申请公布号 |
CA2535525(A1) |
申请公布日期 |
2000.04.28 |
| 申请号 |
CA19992535525 |
申请日期 |
1999.10.18 |
| 申请人 |
DART CONTAINER CORPORATION |
发明人 |
MYER, WAYNE J.;KELLEY, BLAINE M. |
| 分类号 |
B29C47/20;B29C47/92 |
主分类号 |
B29C47/20 |
| 代理机构 |
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代理人 |
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| 主权项 |
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