1、PP
Low cost, easy to get, balanced performance, easy to process. It is one of the most widely used packaging films. The main deficiency is the poor barrier performance of oxygen and other gases.
2、PE
Low price, balanced performance, easy to process. It is widely used in both single film and composite film. The main deficiency is that the barrier performance of oxygen and other gases is poor, and the storage life of food packaging is not long.
3、PET
High strength, good barrier performance to oxygen and other gases. It is one of the common barrier materials for composite films. The price is high.
4、PA
It has high strength, good puncture resistance, good resistance to oxygen and other gases, but poor barrier performance to water. It's expensive.