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

doi:10.19491/j.issn.1001-9278.2010.01.016

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

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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

Abstract

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

ZHANG Yuxia LIU Bengang WANG Xiangdong LI Ying XU Guozhi. Study on Extrusion Foaming of Polypropylene with Supercritical C0₂ as Foaming Agent[J]. China Plastics, 2010, 24(01): 69-73 .

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

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