聚氧化乙烯挤出吹塑成型研究  

Research on PEO's Extrusion-Blown Molding

作　　者：郝喜海[1] 阳家菊[1] 文舒[1] 

机构地区：[1]湖南工业大学包装与材料工程学院,湖南株洲412007

出　　处：《包装学报》2015年第1期35-39,共5页Packaging Journal

摘　　要：为能获得性能良好的PEO水溶性薄膜,采用直接对PEO挤出吹塑、先造粒再吹塑与改性后造粒再吹塑等方法进行了研制,并针对改性剂(如增塑剂、稳定剂)的选择与改性剂配比量的选择进行了探讨。选用甘油为增塑剂、乙二醇为稳定剂,并设置了PEO与增塑剂、稳定剂的质量之比分别为18:1:1,8:1:1,6:1:1,7:1:1.2的4组实验进行对比研究。随着增塑剂甘油添加质量分数的增加,PEO的熔融温度降低;稳定剂乙二醇的加入增加了PEO的热稳定性,有效阻止了实验过程中的氧化现象。最后确定了吹塑与造粒的工艺路线与工艺条件,找出了改性前后PEO的最佳造粒温度与最佳吹塑温度,改性前造粒机机头位置至膜口位置的最佳温度分别为120,122,125,129℃;而改性剂用量不同,最佳吹塑温度也不同,且随改性剂用量的增加而减小。改性前后吹塑出的制品均出现黏度小的现象,在以后的研究中需加入增加黏度的改性剂。In order to produce the high performance PEO water-soluble film, the methods were researched by adopt- ing direct PEO extrusion-blown molding, blow molding after granulation, and modified, granulated and then blow-molding. The choice of modifier such as plasticizer and stabilizer and the proportion of different modifiers were discussed. Experimen- tal comparative study was conducted under the condition of the plasticizer being glycerol, stabilizer being ethylene glycol, the proportion of PEO and plasticizer, stabilizer being 18：1：1, 8：1：1, 6：1：1, 7：1：1.2 respectively. With the increase of plasticizer content of glycerol, the melting temperature of PEO is decreased. Stabilizer ethylene glycol increased the thermal stability of PEO, which effectively prevented the oxidation in the process of experiment. The process routes and process conditions of blow molding and granulating were determined. The optimal granulation temperature and blow molding temperature before and after modified PEO were found. The optimal granulation temperatures before modified were 120, 122, 125 and 129 ℃ in the location from the nose to membrane mouth position. Different modifier dosage would change the optimal blow-molding temperature accordingly and the temperature decreased with an increase of modifier. The products all indicated insufficient viscosity, therefore the modifier to increase viscosity should be added in future research.

关 键 词：PEO薄膜 挤出吹塑 造粒 改性剂 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]