发明名称 |
PERFECTIONNEMENTS AUX MOUSSES DE |
摘要 |
The plastic (pref. polypropylene or polyethylene) is extruded through a slit extrusion nozzle into a low pressure zone defined between concave plates, this zone being maintained at a temperature lower than the extrusion temperature, and the plastic foaming and expanding in this zone so that it contacts the surfaces of the plates and forms a sheet having a cone of elongate cells, and a skin of high density expanded plastic pref. the two concave plates are succeeded by a pair of divergent planar plates, and the foaming agent is an aliphatic hydrocarbon. |
申请公布号 |
BE757054(A4) |
申请公布日期 |
1971.04.05 |
申请号 |
BED757054 |
申请日期 |
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申请人 |
MONSANTO CHEMICALS LTD, MONSANTO HOUSE, 10-18 VICTORIA STREET,LONDON S.W.1., (GR.-BR), |
发明人 |
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分类号 |
B29C44/50;B29D7/00;C08G |
主分类号 |
B29C44/50 |
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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