What are the packaging forms and materials of common puffed foods?

What are the packaging forms and materials of common puffed foods? 1, common packaging forms (1) plastic flexible packaging ordinary plastic flexible packaging: that is, not filled with any gas or vacuum treatment of bulk form, according to the packaging materials added in the barrier material, can meet different shelf life needs
.

Air-filled plastic flexible packaging: Air is filled into the finished packaging to prevent puffed food from being crushed
.

Generally, choose a material with good toughness to prevent the bag body from cracking
easily.

Nitrogen-filled packaging (plastic flexible packaging): the use of nitrogen this inert environment to prevent the oxidation and deterioration of fried puffed food, the corresponding packaging materials for nitrogen, oxygen barrier should be higher, mostly aluminum composite film
.

(2) Plastic barrels (boxes) such packaging forms can prevent puffed food from being crushed, which is convenient to use, but the sealing is poor and the shelf life is shorter
.

(3) Paper barrels should have good stiffness, enough to protect the internal puffed food from breaking
.

At the same time, some paper barrels contain a high barrier aluminum foil material, and the barrel mouth has a sealing cover film to achieve good barrier and sealing, and increase the shelf life
of food.

2, common packaging materials KOPP/VMOPP/LDPE: for potato chip packaging, good heat sealing, oxygen resistance, shading, shelf life can reach more than one year, if the method of nitrogen filling is used, it can also achieve a longer shelf life
.

BOPP/VMPET/CPP (or PE), BOPP/PE/VMPET/PE/CPP COEXTRUDED FILM, OPPP/PET/AL/CPP: Used for puffed food packaging, the form of modified atmosphere packaging, with the advantages
of air tightness, shading, oil resistance and so on.

BOPP/VMCPP, PET/VMCPP: Often used in the packaging of puffed foods such as potato chips, the cost is lower than that of the above two materials, but the shelf life of the contents is slightly shorter
.

The material can block oxygen, moisture, light, oil, fragrance, appearance scrape, colorful, low cost, of which, BOPP, PET and VMCPP stiffness is better, BOPP printability is good, high
gloss.

VMCPP has good barrier properties, fragrance and moisture retention, and CPP oil resistance is also good
.