Process for preparing an oriented composition based on ethylene vinyl alcohol copolymer and oriented product thereof.

摘要

Ethylene/vinyl alcohol copolymer is melt blended with between 1 and 15 wt % of polyolefin that is grafted with a carboxylic acid or carboxylic acid anhydride containing monomer. The blend is formed into an article and then oriented by expansion at a temperature below the melting temperature of the ethylene/vinyl alcohol copolymer. The inclusion of the grafted polyolefin improves the orientability of the ethylene/vinyl alcohol copolymer without seriously detracting from its gas barrier properties.