CAJ | 학술논문

综述了乙烯-乙烯醇(EVOH)共聚物的生产技术、市场现状及发展前景、下游应用展望.由于EVOH共聚物主要用于各种包装,且大部分都与食品相关,因此,采用适当的方法生产乙烯-乙酸乙烯(EVA)共聚物是生产合适EVOH的必要条件.目前,EVA共聚物大多采用高压法连续本体聚合工艺生产,乙酸-乙烯酯摩尔分数一般为5%~40%,而EVA共聚物的醇解多采用均相皂化法.国内聚乙烯醇(PVA)生产企业应加速开发EVOH共聚物,实现EVOH共聚物的国产化,从而缓解国内供需矛盾,为PVA生产商提供新的经济效益增长点.
종술료을희-을희순(EVOH)공취물적생산기술、시장현상급발전전경、하유응용전망.유우EVOH공취물주요용우각충포장,차대부분도여식품상관,인차,채용괄당적방법생산을희-을산을희(EVA)공취물시생산합괄EVOH적필요조건.목전,EVA공취물대다채용고압법련속본체취합공예생산,을산-을희지마이분수일반위5%~40%,이EVA공취물적순해다채용균상조화법.국내취을희순(PVA)생산기업응가속개발EVOH공취물,실현EVOH공취물적국산화,종이완해국내공수모순,위PVA생산상제공신적경제효익증장점.
Ethylene-vinyl alcohol(EVOH)copolymer was widely used for packing material for its high barrier property. The authors summarized the production technology,market status,development prospect and downstream application prospect. EVOH copolymers were mainly applied for various kinds of packing which were related to food,so producing ethylene-vinyl acetate copolymer with proper methods is the necessary conditions to product appreciate EVOH copolymer. EVA copolymers were produced by high-pressure continuous bulk polymerization at present and the molar fraction of the vinyl acetate is 5%~40%. The alcoholysis of the EVA copolymer usually employs homogeneous saponification method. The enterprises in China should develop EVOH copolymer and realize its localization to relieve the imbalance between supply and demand,and new growing point of economic benefit is supplied for PVA producers.