China Plastics ›› 2022, Vol. 36 ›› Issue (3): 64-68.DOI: 10.19491/j.issn.1001-9278.2022.03.011

• Materials and Properties • Previous Articles     Next Articles

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

CAO Zhifeng(), ZHAO Lipin, HE Ting, MA Baijun()   

  1. Chongzhou Junjian Plastic Co,Ltd,Chengdu 611200,China
  • Received:2021-11-18 Online:2022-03-26 Published:2022-03-25

Abstract:

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.

Key words: ethylene?vinyl alcohol copolymer, polypropylene, five?layer co?extrusion, barrier film

CLC Number: