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公开(公告)号:US5821272A
公开(公告)日:1998-10-13
申请号:US339
申请日:1998-01-20
CPC分类号: C08J9/22 , B29C44/3461 , B29C44/5609 , C08J2323/02 , Y10S264/09 , Y10S521/918
摘要: Post-treatment method of polyolefin resin pre-expanded particles comprising: introducing the polyolefin resin pre-expanded particles foamed by using an inflammable blowing agent into an extraction vessel filled with steam previously; feeding an additional steam into the extraction vessel; extracting the inflammable blowing agent gas from the polyolefin resin pre-expanded particles; discharging the resulting steam which contains the extracted inflammable blowing agent gas from the extraction vessel continuously or intermittently; and liquefying the steam to separate and recover the inflammable blowing agent gas. According to the post-treatment method of polyolefin resin pre-expanded particles, the inflammable blowing agent can be extracted from the pre-expanded particles in a short period of time and the extracted inflammable blowing agent can be re-used.
摘要翻译: PCT No.PCT / JP97 / 02074 Sec。 371日期1998年1月20日 102(e)日期1998年1月20日PCT提交1997年6月16日PCT公布。 第WO97 / 48759号公报 日期1997年12月24日聚烯烃树脂预发泡粒子的后处理方法包括:将通过使用可燃性发泡剂发泡的聚烯烃树脂预发泡颗粒引入预先装有蒸汽的萃取容器中; 将额外的蒸汽进料到提取容器中; 从聚烯烃树脂预发泡颗粒中提取易燃发泡剂气体; 从提取容器中连续或间歇地排出含有提取的易燃发泡剂气体的所得蒸汽; 并使蒸汽液化以分离和回收易燃发泡剂气体。 根据聚烯烃树脂预发泡颗粒的后处理方法,可以在短时间内从预发泡颗粒中提取易燃发泡剂,并且可以重新使用提取的可燃性发泡剂。