Ethylene vinyl alcohol (EVOH) copolymer is one of three largest barrier resins in the world.Its industrial production process comprises two steps,i.e. copolymerization and alcoholysis.

• 乙烯-乙烯醇共聚物(EVOH)是目前世界三大阻隔树脂之一,工业生产可分为聚合、醇解两步。