发明名称 |
Polymer foam plank with densified skin, method and apparatus for producing a densified skin on a foam plank |
摘要 |
A method and apparatus for making a densified skin polymer foam plank comprising providing a polymer foam having a plurality of cells and heating an outer surface of the foam at a heating station. The heating step collapses and melts the cells adjacent the outer surface to form the densified skin having a density greater than a density of the foam before the heating step. Additionally, the method and apparatus may further include extruding the polymer foam from an extruder.
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申请公布号 |
US6716379(B2) |
申请公布日期 |
2004.04.06 |
申请号 |
US20000497348 |
申请日期 |
2000.02.03 |
申请人 |
PACTIV CORPORATION |
发明人 |
STIMLER JEFFREY J.;ZETTEL DAVID P.;FARHA SAID K. |
分类号 |
B29C44/22;(IPC1-7):B29C44/22 |
主分类号 |
B29C44/22 |
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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