发明名称 |
Foam structure of coalesced foam strands of profiles |
摘要 |
<p>Improved closed cell foams, particularly suitable for use in packaging applications, comprise a plurality of coalesced parallel strands or profiles of thermoplastic resin. When the resin is a non-aromatic olefin, the heat seal strength of a film thereof is at least 30 Newtons/inch (2.5 cm) width. Preferably, the resin is a mixture of an olefin polymer resin and a copolymer of ethylene with one or more copolymerizable comonomers having a lower melting point than the olefin polymer resin. The cross-section of the strands or profiles and/or their spacial arrangement advantageously are such that they are joined at their extremities to form a network defining voids. The resin may contain up to 50 weight percent of a nucleating agent, preferably carbon black. The strands and profiles suitably are extruded through a multi-orificed die in which some orifices are temporarily blocked off to produced the desired structural shape.</p> |
申请公布号 |
GR3023546(T3) |
申请公布日期 |
1997.08.29 |
申请号 |
GR19970401197T |
申请日期 |
1997.05.23 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
MALONE, BRUCE A.;YAO, PETER C.;RUSSELL, ROBERT J. |
分类号 |
B32B5/18;B29C44/46;B29C47/00;B29K105/04;B32B3/12;C08J9/14;(IPC1-7):B29C44/00 |
主分类号 |
B32B5/18 |
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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