中国塑料 ›› 2007, Vol. 21 ›› Issue (1): 64-68.

• 加工与应用 • 上一篇    下一篇

PE-HD /PA6 /EVOH阻透容器成型工艺与性能研究

周波,承民联*,俞强,孟俊   

  1. 江苏工业学院材料科学与工程系,江苏常州213016
  • 出版日期:2007-01-26 发布日期:2021-03-03

Processing Conditions and Properties of PE-HD/PA6/EVOH Barrier Containers#br#

ZHOU Bo,CHENG Min-lian*,YU Qiang,MENG Jun#br#   

  1. Department of Material Science and Engineering, Jiangsu Polytechnic University,Changzhou 213016,China
  • Online:2007-01-26 Published:2021-03-03

摘要: 将高密度聚乙烯(PE-HD)、聚酞胺6 ( PA6)与乙烯一乙烯醇共聚物(EVUH)的复配体和相容剂初混合后,通过挤出机熔融共混、中空吹塑制得阻透容器。考察了树脂及共混物的流变性能,研究了相容剂用量、阻透树脂用量和成型工艺条件对容器阻透性能的影响。利用扫描电镜(SEA)观察了瓶壁的层状结构。实验结果表明,PA6 /EVOH复配体增加了阻透树脂的熔体赫度,提高了层状共混工艺的稳定性。与PE-HD /PA6二元共混容器相比,PE-HD/PA6/EVOH三元共棍容器所需相容剂更少。当阻透树脂用量为15-18份、相容剂用量为2-3份、加工温度在225--230℃之间、螺杆转速控制在30 r/min 左右、停留时间在3 min时,PE-HD/PA6 /EVOH共混容器的阻透性能得到明显提高。

关键词: 高密度聚乙烯, 乙烯一乙烯醇共聚物, 聚酞胺6, 共混, 阻透性能

Abstract:

Blends of PE-HD/PA6/EVOH and PE-g-MAH as a compatibilizer were blow molded to barri er containers, the effects of composition and processing conditions on rheological and barrier properties were investigated. The laminar structure of the container section was observed using scanning electron microscopy.EVOH acted as the second compatibilizer, which interacted with PA6, thus increased the melt viscosity and improved processingstability. The optimal processing condition was set agtempera ture between225and230℃,the rate of screw rotation 30 rpm, and the blending time 3 min.

Key words: high density polyethylene;poly ( ethylene-co-vinyl alcohol );ployamide 6;blend, barrier property

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