发明名称 |
METHOD AND APPARATUS FOR FORMING THERMOPLASTIC FOAMS |
摘要 |
Process and apparatus for the preparation of foam articles by extruding a heat-plastified foamable gel through a die orifice (14) into a zone of reduced pressure in a shaping channel wherein the gel is supported on a cushion of gas at the die face (24) and at least in the area of the channel near the orifice of the die and a restraining force is applied to the foam in the area where the foam surface has cooled to provide foams having an enlarged cross-sectional area.
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申请公布号 |
US4146563(A) |
申请公布日期 |
1979.03.27 |
申请号 |
US19770862264 |
申请日期 |
1977.12.20 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
RATAFIA, MANUEL S.;SUH, KYUNG W. |
分类号 |
B29C47/90;B29B7/00;B29C44/50;B29C47/00;B29C47/14;B29C47/94;B29K105/04;(IPC1-7):B29D27/00 |
主分类号 |
B29C47/90 |
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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