PE–HD/GF复合带共挤数值模拟与实验制备  

Numerical Simulation and Experimental Production of PE–HD/GF Composite Tape By Using Co-Extrusion Technology

作　　者：秦升学[1] 张兴邦[1] 王大鹏[2] 刘杰[1] 王庆昭[2] 

机构地区：[1]山东科技大学机械电子工程学院,山东青岛266590 [2]山东科技大学化学与环境工程学院,山东青岛266590

出　　处：《工程塑料应用》2015年第1期53-57,共5页Engineering Plastics Application

基　　金：青岛市科技计划项目[12-1-4-6-(6)-jch]

摘　　要：基于复合共挤成型原理,建立了高密度聚乙烯(PE–HD)/玻璃纤维(GF)复合共挤有限元模型,采用有限元软件Polyfl ow对流道内熔体的三维等温非牛顿流动行为进行了数值模拟,给出了GF以不同速度移动时流道内熔体压力和速度的分布特点及变化规律。根据数值模拟结果确定了挤出工艺参数,研制了共挤模具,制备了PE–HD/GF复合带,并进行了力学性能测试。结果表明,随着GF移动速度的提高,流道内压力减小,熔体在复合成型段挤出速度明显增加;GF移动速度达到一定值时熔体挤出速度均匀,移动速度过大则导致熔体速度分布不均匀。研制的PE–HD/GF复合带拉伸强度保留率可达GF的82%。Based on the forming principle of composite co-extrusion,the finite element model of high density polyethylene （PE–HD）/glass fiber（GF） composite co-extrusion was established. Three dimensional isothermal non-Newtonian flow behavior of melt in the mold channel was numerical simulated by using Polyflow. The distribution characteristics and variation law of pressure and velocity of melt with different GF feed speeds were given. The extrusion process parameters were determined and experimental mold for co-extrusion was developed based on the simulation results and PE–HD/GF composite tape was produced. The mechanical properties tests were conducted. The results show that the pressure in channel decreases with the feed rate of glass fiber increasing, and the extrusion speed of melt in composite molding zone is improved obviously. The melt extrusion speed is homogeneous when GF mobile speed reaches a certain value. But unstable extrusion speed will be induced with too high GF feed speed. 82 percent of GF’s tensile strength could be remained in PE–HD/GF composite tape.

关 键 词：玻璃纤维 高密度聚乙烯 复合共挤 数值模拟 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]