PROPERTIES, PROCESSING AND HANDLING

摘要

Ethylene Vinyl Alcohol copolymer (EVOH), a semi crystalline random copolymer of ethylene and vinyl alcohol, is widely and most commonly used in packaging structures for perishable food because of its superior barrier to oxygen. In addition to providing excellent oxygen barrier in food packaging, EVOH is capable of meeting other demanding requirements such as CO_2 barrier for carbonated beverage bottles, hydrocarbon vapor barrier in plastic automobile fuel tanks, providing excellent chemical resistance for applications such as agriculture chemical bottles and barrier to fragrances and solvents in cosmetics. The high barrier performance of EVOH, even after abuse, has allowed for conversion from foil and metallized film laminations to co-extruded barrier films.