What are the packaging materials and forms puffed food packing bag?

Puffed food in the food market occupies an important position, is often one of the production of flexible packaging plastic flexible packaging factory. Then puffed food packaging what are the packaging materials and forms? Common forms of puffed food packaging bags mainly have three kinds: the first is the common plastic soft packing, not fill any gas or vacuum processing bulk form, according to the packing materials to add the barrier property of the material is different, can meet the demand of different shelf life; The second is filling the air the plastic flexible packaging, into the air within the finished product packaging, in order to prevent the puffed food is crushed. Generally choose better ductile material, in order to prevent the bag burst; The third is the nitrogen filled plastic flexible packaging, the use of nitrogen gas to prevent Fried type puffed food oxidation, the corresponding packing material for high nitrogen, oxygen barrier property, more for aluminized composite membrane. There are three kinds of common puffed food packaging materials mainly: the first is the KOPP/VMOPP/LDPE, used for chip packaging, it has good heat sealing, the oxygen resistance, shading, etc, and can achieve more than one year shelf life, if we adopt the method of filling nitrogen, can also achieve a long shelf life; Second, BOPP/VMPET/CPP ( Or PE) , BOPP/PE/VMPET/CPP co-extrusion film, OPP/PET/AL/CPP, used in the packaging of puffed food, adopt the form of a gas packaging, sealing, shading, oil resistance, etc; The third is the BOPP/VMCPP, PET/VMCPP, and often used for potato chips and the packaging of puffed food, relative to the above two materials with low cost, but the content of the short shelf life. The material with oxygen resistance, the resistance is wet, avoid light, oil resistant, sweet, pretty appearance, bright colors, the advantages of low cost, among them, the stiffness of the BOPP, PET and VMCPP, BOPP printing and high gloss. CPP oil resistance is better also. VMCPP good barrier property, protect wet resistance.
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