热塑性聚氨酯高压釜发泡工艺的研究  

Study on Foaming Process of Thermoplastic Polyurethane in Autoclave

作　　者：路宏伟 王建康 LU Hong-wei;WANG Jian-kang(Tianjin Key Laboratory of Integrated Design and On-line Monitoring for Light Industry&Food Machinery and Equipment,College of Mechanical Engineering,Tianjin University Science and Technology,Tianjin 300222,China;Tianjin Polymorphic Hybrid Machinery Equipment Co.,Ltd.,Tianjin 300222,China)

机构地区：[1]天津科技大学机械工程学院,天津市轻工与食品工程机械装备集成设计与在线监控重点实验室,天津300222 [2]天津多态混机械设备有限公司,天津300222

出　　处：《塑料工业》2020年第5期49-52,149,共5页China Plastics Industry

摘　　要：利用高压釜对热塑性聚氨酯(TPU)进行发泡,考察了发泡温度、泄压速率、熔体流动性对泡孔结构、发泡倍率的影响。结果表明,TPU在发泡温度185和195℃下,均可得到泡孔结构;泡孔平均直径随着泄压速率的增大而减小;两种发泡温度下的泡孔密度随着泄压速率的增大,具有不同的趋势;最大发泡倍率出现在发泡温度195℃、泄压速率1. 72 MPa/s的条件下。Thermoplastic polyurethane( TPU) was foamed in autoclave. The effects of foaming temperature,pressure release rate and melt fluidity on cell structure and foaming ratios were investigated. The results show that TPU can obtain the cell structure at 185 and195 ℃. The average diameter of the cell decreases with the increase of the pressure relief rate. The cell density at the two foaming temperatures has different trends with the increase of the pressure relief rate. The maximum foaming rate is 195 ℃ and the pressure relief rate is 1. 72 MPa/s.

关 键 词：超临界二氧化碳 高压釜 热塑性聚氨酯 发泡 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]