In the performance of packaging ways, food plastic packaging requirements can be divided into internal and external requirements of two aspects: one, the inherent requirement of food packaging is to point to by the packing, the food within its packaging to ensure the quality technical requirements of the implementation such as strength, barrier property, breathing plastic bags.
1, the strength requirement: refers to the packing can protect the food in the process of storage, stacking, transportation and handling various destructive power of resistance to the outside world, such as pressure, impact and vibration, etc.
Food packaging strength requirements related to many factors, including the mode of transportation,
Such as cars, planes)
And stacking form (
Such as multi-layer stacking, cross stacking)
And the environment (
Such as climate, health, environment)
Three kinds of factors.
2, barrier property requirements: barrier property is one of the important performance in food packaging.
A lot of food in the storage and packing, because of the barrier property errand food flavor and quality change, ultimately affect the quality of the food.
Barrier property requirement is determined by the food itself characteristic, its characteristics are foreign, internal block or selective blocking and so on.
Block material are air, water, oil, light, microorganism and so on.
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