发明名称 |
MAKING UNDERCUT MOULDINGS |
摘要 |
Undercut mouldings are made by injecting a crosslinkable and foamable composition (15) based on a polymer of ethylene into a mould (11, 12) having an undercutting surface (14). The composition is heated in the closed mould to cause crosslinking and foaming. When the mould is opened the contents expand (16) and free themselves from the undercutting surface. Preferred compositions include homopolymers of ethylene and ethylene/vinyl acetate copolymers containing 1.8% weight of dicumyl peroxide as crosslinking agent and 1.7% weight of azodicarbonamide as foaming agent. |
申请公布号 |
DE2862153(D1) |
申请公布日期 |
1983.02.17 |
申请号 |
DE19782862153 |
申请日期 |
1978.10.13 |
申请人 |
IMPERIAL CHEMICAL INDUSTRIES PLC |
发明人 |
GILBY, GORDON WILLIAM |
分类号 |
B29C44/58;(IPC1-7):B29C1/14;B29D27/00;C08J9/00;C08L23/04 |
主分类号 |
B29C44/58 |
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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