气体辅助共挤出矩形截面PP双层型材的实验研究  

Experimental Study on Gas-assisted Co-extrusion of Bi-layer PP Profiles with Rectangular Section

作　　者：黄益宾[1] 柳和生[1] 黄兴元[2] 熊爱华[1] 

机构地区：[1]上饶师范学院上饶市聚合物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：《塑料工业》2013年第4期49-51,56,共4页China Plastics Industry

基　　金：国家自然科学基金(51163011);教育部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(20114BAB206026);江西省青年科学基金(20121521090005);赣鄱英才555工程领军人才培养计划资助

摘　　要：为实验研究气体辅助共挤成型工艺的特性,建立了气辅共挤成型实验系统,通过气辅共挤和传统共挤出矩形截面的聚丙烯PP(2.0HC)/PP(T300)双层型材,在挤出胀大、黏性包围、挤出产量及制品表面质量四4个方面做了对比研究。结果表明,气辅共挤制品的挤出胀大率接近于0,黏性包围程度相比传统共挤减小了60%;在相同生产条件下,气辅共挤出产量高于传统共挤,而气辅共挤制品的表面质量与传统共挤制品无明显差别。研究证明了气体辅助共挤能显著改善共挤制品质量并能提高生产效率。To study the characteristics of gas-assisted co-extrusion （ GACE）, an experimental system of GACE was established. An PP （2. 0HC）/PP （T300） bi-layer profile with rectangular section was extruded through GACE and traditional co-extrusion respectively. Then, a comparative study was performed in four aspects, including the die swell, encapsulation, output and surface quality of the extrudate. The results indicated that the die swell rate of the GACE extrudate was very close to zero and the encapsulation degree decreased by 60%. Also, it proved that the output of GACE was higher than that of traditional co-extrusion under the same conditions. However, there was no obvious difference in surface quality between the exrudates obtained by GACE and traditional co-extrusion. These results showed that GACE can improve the quality of co-extrusion products remarkably and raise the productivity.

关 键 词：气辅共挤 实验 聚丙烯 黏性包围 挤出胀大 

分 类 号：TQ320.663[化学工程—合成树脂塑料工业]