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公开(公告)号:US20050288383A1
公开(公告)日:2005-12-29
申请号:US11200725
申请日:2005-08-10
申请人: Christopher Haas , Mark Gehlsen , Sara Mortenson , Joan Strobel , Ravi Sura , David Vall
发明人: Christopher Haas , Mark Gehlsen , Sara Mortenson , Joan Strobel , Ravi Sura , David Vall
CPC分类号: B32B5/18 , B29C44/352 , B29C44/505 , B29C44/5627 , B29K2023/12 , C08J9/0061 , C08J9/08 , C08J9/103 , C08J9/36 , C08J2201/03 , C08J2205/044 , C08J2205/052 , C08J2323/12 , C08J2323/14 , C08J2423/12 , Y10T428/249978 , Y10T428/249979 , Y10T428/249981 , Y10T428/249982 , Y10T428/249988 , Y10T428/249991 , Y10T428/249992
摘要: The present invention is directed to a process for producing a polypropylene foam by mixing a high melt strength polypropylene and a blowing agent to form a melt mixture, reducing the temperature of the melt mixture at the exit of the apparatus to an exit temperature that is no more than 30° C. above the melt temperature of the neat polypropylene while maintaining the melt mixture at a pressure sufficient to prevent foaming; passing the mixture through said exit shaping orifice and exposing the mixture to atmospheric pressure, whereby the blowing agent expands causing cell formation resulting in foam formation, and orienting said foam. The foam is useful as tape backings, thermal and acoustical insulation and as a diffuse reflector for use in optical applications such as computer displays.
摘要翻译: 本发明涉及通过混合高熔体强度聚丙烯和发泡剂以形成熔融混合物来生产聚丙烯泡沫的方法,将该装置出口处的熔体混合物的温度降低到不存在的出口温度 在纯聚丙烯的熔融温度以上超过30℃,同时将熔融混合物保持在足以防止起泡的压力下; 使混合物通过所述出口成形孔并将混合物暴露于大气压力,由此发泡剂膨胀导致细胞形成,导致泡沫形成,并使所述泡沫体定向。 该泡沫作为胶带背衬,热和隔音材料以及作为用于光学应用如计算机显示器的漫反射器是有用的。