barrier packing 阻隔性的包装
But the barrier of PET is common, not enough for a special packing contents (eg. Beer), limited the scope of applications.
但PET的阻隔性一般，对于一些特殊包装内容物(如啤酒)来讲远远不够，限制了其应用范围。
One of the most important problems in packing foods and similar products is to achieve a long shelf life by using good oxygen barrier packing films.
食品包装需要氧气阻隔性能优异的包装材料以延长产品的货架寿命。
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