五层共挤阻隔膜的制备与性能研究  

Preparation and properties of five-layer co-extrusion barrier films

作　　者：曹志峰 赵立品 何汀 马百钧 CAO Zhifeng;ZHAO Lipin;HE Ting;MA Baijun(Chongzhou Junjian Plastic Co,Ltd,Chengdu 611200,China)

机构地区：[1]崇州君健塑胶有限公司,成都611200

出　　处：《中国塑料》2022年第3期64-68,共5页China Plastics

摘　　要：选用乙烯-乙烯醇共聚物(EVOH)为阻隔层原料,采用5层共挤薄膜吹塑机制备了5层共挤阻隔膜,并对其力学性能和阻氧性能进行了研究。结果表明,制备的阻隔膜各层厚度较均匀,拉伸强度可达30 MPa,热合强度超过35 N/15 mm,氧气透过量可达0.4 cm^(3)/(m^(2)·d·0.1 MPa);随着阻隔层厚度的增加,阻隔膜的阻氧性能先增强后趋于不变;随着测试温度和湿度的升高,阻隔膜的阻氧性能下降。Five-layer co-extrusion barrier films were prepared with an ethylene-vinyl alcohol copolymer as a barrier layer using a multi-layer co-extrusion blow film machine.The preparation process of the barrier films was determined on the basis of resin thermal properties and melt flow rate,and their properties were investigated.The results indicated that the barrier films exhibited good mechanical and heat-sealing properties.Their oxygen barrier properties increased with an increase of thickness and then maintained a stable value.However,the oxygen barrier properties decreased with an increase in test ambient temperature and relative humidity.

关 键 词：乙烯-乙烯醇共聚物 聚丙烯 5层共挤 阻隔膜 

分 类 号：TQ320.72[化学工程—合成树脂塑料工业]