发明名称 |
Process for producing thermoformable foam sheet using a physical blowing agent |
摘要 |
The present invention is a process for producing a thermoplastic foam sheet comprising contacting a molten monovinylidene aromatic or olefinic polymer with a physical blowing agent to form a polymer/blowing agent mixture, and foaming the mixture into a region of lower pressure within a sheet extrusion line, wherein the extrudate is pulled and compressed to form a thermoplastic foam sheet having a uniform thickness.
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申请公布号 |
US2002121716(A1) |
申请公布日期 |
2002.09.05 |
申请号 |
US20010004574 |
申请日期 |
2001.12.04 |
申请人 |
WELSH GARY C.;BALLOT MICHAEL;SALMANG ROLDOLFO J. |
发明人 |
WELSH GARY C.;BALLOT MICHAEL;SALMANG ROLDOLFO J. |
分类号 |
B29C44/56;C08J9/12;(IPC1-7):C08J9/00;B29D1/00 |
主分类号 |
B29C44/56 |
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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