中国塑料 ›› 2010, Vol. 24 ›› Issue (01): 69-73 .DOI: 10.19491/j.issn.1001-9278.2010.01.016

• 加工与应用 • 上一篇    下一篇

超临界二氧化碳挤出发泡聚丙烯研究

张玉霞 刘本刚 王向东 李莹 许国志   

  1. 北京工商大学轻工业塑料加工应用研究所 中国塑料杂志社 北京工商大学材料科学与工程系 轻工业塑料加工应用研究所
  • 收稿日期:2010-01-27 修回日期:1900-01-01 出版日期:2010-01-26 发布日期:2010-01-26

Study on Extrusion Foaming of Polypropylene with Supercritical C02 as Foaming Agent

ZHANG Yuxia LIU Bengang WANG Xiangdong LI Ying XU Guozhi   

  • Received:2010-01-27 Revised:1900-01-01 Online:2010-01-26 Published:2010-01-26
  • Contact: XU Guozhi

摘要: 以超临界二氧化碳作为发泡剂,采用纳米黏土和长链支化聚丙烯(LCBPP)改性的线形聚丙烯(LPP)挤出发泡制备幅宽300 mm的发泡聚丙烯片材,研究了CO2注气量、机头温度和纳米黏土的加入对产品密度和泡孔密度的影响。结果表明,纳米黏土的加入可以有效改善聚丙烯的可发性。在注气档位为0.5,机头温度为157 ℃时得到的发泡聚丙烯片材密度为0.454g/cm3,泡孔密度为3.37×107个/cm3。

关键词: 聚丙烯, 超临界二氧化碳, 挤出发泡, 成型工艺

Abstract: Foamed sheet with width of 300 mm of polypropylene(PP) modified by nano-clay and high-melt-strength propylene was extrusion foamed with supercritical CO2 as foaming agent. Effect of CO2 content, die temperature, and nano-clay on the sheet density and cell density was researched. Results showed that nano-clay can improve the quality of the PP foam sheet. The sheet density and cell density were 0.454g/cm3 and 3.37×107 cells/cm3 respectively when the gas injection shift was 0.5 and mold mold temperature was 157 ℃.

Key words: polypropylene, supercritical CO2, extrusion foaming, processing technology