| 发明名称 |
METHOD AND APPARATUS FOR EXTRUSION OF THERMOPLASTIC FOAM |
| 摘要 |
<p>METHOD AND APPARATUS FOR EXTRUSION OF THERMOPLASTIC FOAM Introducing gaseous blowing agent into molten polystyrene. This is accomplished by a pneumatically activated piston which injects the gas into the molten polystyrene as a result of both the forward and return thrust of the piston.</p> |
| 申请公布号 |
CA1225211(A) |
申请公布日期 |
1987.08.11 |
| 申请号 |
CA19830433401 |
申请日期 |
1983.07.27 |
| 申请人 |
MOBIL OIL CORPORATION |
发明人 |
JOHNSON, DAVID E. |
| 分类号 |
B29B7/00;B29C44/34;B29C47/00;B29C47/10;B29C47/14;B29C47/50;B29C47/92;(IPC1-7):B29C67/20 |
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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