The server is under maintenance between 08:00 to 12:00 (GMT+08:00), and please visit later.
We apologize for any inconvenience caused
Login  | Sign Up  |  Oriprobe Inc. Feed
China/Asia On Demand
Journal Articles
Laws/Policies/Regulations
Companies/Products
Bookmark and Share
Relation between stress concentration and unstable flow of melt in extrusion process
Author(s): 
Pages: 72-76
Year: Issue:  5
Journal: CHINA SYNTHETIC RESIN AND PLASTICS

Keyword:  线型低密度聚乙烯低密度聚乙烯应力集中压力振荡不稳定流动;
Abstract: 用双毛细管流变仪研究了线型低密度聚乙烯、低密度聚乙烯及其共混物在较宽速率范围内的流变行为,通过分析流场中应力集中效应与不稳定流动的关系,从而控制不稳定流动现象.结果表明:挤出物在口模入口处的应力集中占总压力的15%以上时,一般导致毛细管入口压力降的无规振荡及挤出物的整体无规则波动和破裂;整条毛细管上的挤出压力发生振荡,挤出物外观发生光滑段和粗糙段交替出现的有规畸变.
Related Articles
No related articles found