发明授权
- 专利标题: Polypropylene foam sheets
- 专利标题(中): 聚丙烯泡沫板
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申请号: US804701申请日: 1991-12-11
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公开(公告)号: US5149579A公开(公告)日: 1992-09-22
- 发明人: John J. Park , Leon Katz , Norman G. Gaylord
- 申请人: John J. Park , Leon Katz , Norman G. Gaylord
- 申请人地址: VA Richmond
- 专利权人: James River Corporation of Virginia
- 当前专利权人: James River Corporation of Virginia
- 当前专利权人地址: VA Richmond
- 主分类号: B29C44/00
- IPC分类号: B29C44/00 ; B29C51/10 ; B29C59/00 ; B29K23/00 ; B29K105/04 ; B29L7/00 ; B29L9/00 ; B29L22/00 ; B29L31/00 ; B32B5/18 ; B32B27/32 ; B65D65/02 ; C08F8/00 ; C08F110/06 ; C08J9/04 ; C08J9/12 ; C08J9/14
摘要:
A thermoformable, rigid or semi-rigid polypropylene foam sheet having a smooth surface and a uniform cell structure and a density of at least 2.5 lbs/ft.sup.3 is prepared by extruding a mixture of a nucleating agent, a physical blowing agent and a polypropylene resin having a high melt strength and high melt elasticity.
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