聚合物气辅共挤成型中气垫层的建立及其稳定性分析  

Establishment and Stability Analysis of the Gas Layer in Polymer Gas-Assisted Coextrusion

作　　者：黄益宾[1] 柳和生[1,2] 黄兴元[2] 熊爱华[1] 

机构地区：[1]上饶师范学院高分子材料辅助成型重点实验室,江西上饶334001 [2]南昌大学聚合物加工研究室,江西南昌330031

出　　处：《高分子材料科学与工程》2013年第4期113-116,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51163011);高等学校博士学科点专项科研基金(20093601110001);江西省自然科学基金资助项目(20114BAB206026);江西省青年科学基金(20122BAB216012)

摘　　要：采用自行研制的气辅共挤成型实验系统和矩形截面气辅双层共挤口模,实验研究了气辅共挤过程中气体压力、气体温度以及气阀的开启顺序对气垫层稳定性的影响,得到了建立稳定气辅共挤气垫层的基本工艺准则。结果表明,气体压力和温度是影响气垫层稳定性的关键因素,要形成稳定气垫层,气体的压力和温度应尽量与聚合物熔体接近,气体和熔体的压力差不应超过0.1MPa,温度差不应超过10℃,先开启气阀时,要严格控制气体压力。To get the basic technology standards for establishing stable gas layer in gas-assisted coextrusion, a study was conducted to explore the influences of gas pressure, gas temperature, and the switch sequence of gas valve on the stability of gas layer with the gas-assisted coextrusion experiment system, and gas-assisted coextrusion die was developed. The results show that the gas pressure and temperature are the key factors which affect the stability of gas layer. To establish a stable gas layer, the pressure and temperature of the gas should be as close as possible to those of the polymer melts. The pressure difference should not exceed 0.1MPa, and the temperature difference should not exceed 10 ℃ . If the gas valve is opened firstly, the gas pressure should be strictly controlled

关 键 词：聚合物 气辅 共挤 气垫层 稳定性 

分 类 号：TQ320.663[化学工程—合成树脂塑料工业]