Package material PET film, also known as polyester film, polyethylene terephthalate, the material of membrane chemical performance is stable, excellent physical performance, widely used in
food packaging.
PET film according to the mode of production can be divided into the stretch film, APET, blow molding and bidirectional tensile BOPET three, including BOPET most widely application in food packaging.
Them that can be used as a plastic blister products such as packaging materials, can also act as as stickers printing packaging material, packaging material is widely used as packing bags.
Small make up today briefly summarizes the characteristics of package material PET as well as the application in the food packaging bags.
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Food grade PET film package material characteristics as a whole, food grade package material PET film high transparency, good strength, good insulation properties, high barrier property.
In food packaging applications, the performance of the main show is as follows: the first PET film has the good comfortable sex, ink adhesion is good.
In the process of dieyin, design of administrative levels clear, ink color is good.
Second, it particularly good barrier property, can effectively prevent organic gas, nitrogen, oxygen, water vapour and other gases through the film.
Then its good strength, high stiffness, such packaging made of surface more smooth.
Finally is the new PET can stability, the influence of temperature on the is not high.
But PET film heat sealing performance is poor, can't heat sealing.
Package material PET film application in the food packaging PET cannot be used as a single food packaging bags, because it is poor heat sealing performance.
Someone so that it is not in direct contact with food, this is wrong.
Food grade PET is able to direct contact with food, such as many of our blister boxes, trays, plastic bottles are PET.
So of PET food packaging bags are compound bag, mainly as a printing layer and the barrier layer.
In the production of free-standing, eight autoregulating, four edge-sealing bag type, will choose the PET composite material, such as PET/NY/PE.
Its good strength and stiffness, can let food sack to stand up better.
And vacuum, cooking, frozen food bags will choose PET composite, such as PET/AL/PE.
Because of PET film has good elongation, resistance to temperature, high temperature or low temperature environment, not deformation, good barrier property and flexibility.
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