发明名称 |
A 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 of less than 3 mm.
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申请公布号 |
CA2399438(A1) |
申请公布日期 |
2001.08.09 |
申请号 |
CA20012399438 |
申请日期 |
2001.01.12 |
申请人 |
DOW GLOBAL TECHNOLOGIES INC. |
发明人 |
BALLOT, MICHAEL M.;WELSH, GARY C.;SALMANG, ROLDOLFO J. |
分类号 |
B29C44/56;B29C47/00;B29C47/06;B29K23/00;B29K25/00;B29K105/04;B29L7/00;B29L9/00;B32B5/18;B32B27/30;B32B27/32;C08J9/12;(IPC1-7):C08J9/12 |
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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