发明名称 |
SETT ATT TILLFORA BLASMEDEL VID EXTRUDERING AV TERMOPLASTMATERIAL, FOR ATT BILDA CELLFORMIGA PRODUKTER |
摘要 |
<p>A process is provided for the production of a cellular thermoplastic body, wherein solid thermoplastic material is melted under pressure in an extruder, a gaseous blowing agent is injected into the molten thermoplastic material under pressure and said molten thermoplastic material and gaseous blowing agent is passed to a zone of reduced pressure to effect the cellular expansion of said thermoplastic material by said gaseous blowing agent, and wherein said gaseous blowing agent is metered at sonic velocity at a point upstream of the injection of said gaseous blowing agent into said molten thermoplastic material.</p> |
申请公布号 |
SE415009(B) |
申请公布日期 |
1980.09.01 |
申请号 |
SE19750010152 |
申请日期 |
1975.09.11 |
申请人 |
* UNION CARBIDE CORPORATION |
发明人 |
W P * MULVANEY |
分类号 |
B29B7/00;B29C44/32;B29C44/34;B29C47/00;B29C47/02;B29C47/10;B29C47/28;B29C47/68;B29C47/92;(IPC1-7):29D27/02 |
主分类号 |
B29B7/00 |
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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