Food aluminum foil bag is an aluminum foil bag product made of aluminum and other high barrier materials according to the unique properties of aluminum.
It is a thin sheet of high-purity aluminum formed by multiple calendering. It is an excellent heat conductor and shading body.
Food bags are more important in packaging. The following is a brief introduction to the characteristics, materials and application scope of aluminum foil bags.
The purity of our common food aluminum foil bag is more than 99.5%. Its main characteristics are:
1. It has good mechanical properties and can meet the use requirements of automatic packaging machinery, but it has insufficient flexibility, low tear strength, easy fracture at the fold, but easy to process, and can be combined with other plastic films;
2. Light weight, which is conducive to reducing transportation cost;
3. No thermal bonding, acid and alkali resistance, easy to curl;
4. Metallic luster, good shading performance, strong light reflection ability, and the reflectivity can reach more than 95%;
5. Good barrier, not easy to corrode, moisture-proof, waterproof and strong air tightness;
At high and low temperature, the shape is stable and not easy to expand and deform. Material of aluminum foil bag: PET / NY / Al / PE (general packaging); PET / NY / Al / CPP (high temperature cooking).
Ordinary_ The layer is polyester, which is used for puncture resistance_ The layer is aluminum foil, which functions as moisture-proof, conductive and shielding.
The third layer is polyethylene, which functions as, Sealing, vacuum packaging, etc.
The aluminum foil bag made of this material usually has uniform and stable performance, the outer polyester can usually prevent collision, the conductive metal layer of the middle layer can quickly transfer heat dissipation, and the inner layer can keep the aluminum foil bag from temperature change and stable shape.
Material of aluminum foil bag: PET / NY / Al / PE (general packaging); PET / NY / Al / CPP (high temperature cooking).
The ordinary layer is polyester, which is used for puncture resistance, the outer layer is aluminum foil, which is used for moisture-proof, conductivity, shielding, etc., and the third layer is polyethylene, which is used for, Sealing, vacuum packaging, etc.
The aluminum foil bag made of this material usually has uniform and stable performance, the outer polyester can usually prevent collision, the conductive metal layer of the middle layer can quickly transfer heat dissipation, and the inner layer can keep the aluminum foil bag from temperature change and stable shape.
Composite aluminum foil bags are used for food packaging, generally used for packaging meat products, dried fish, aquatic products, cured meat, roast duck, roast chicken, roast pig, quick-frozen food, ham, cured meat products, sausage, cooked meat products, pickles, bean paste, seasoning, etc., with good aroma, quality, taste and color preservation effects.
After the food packaging bag is torn, it depends on the shape and structure of the section. If it is torn evenly from the middle of the heat seal of the vacuum packaging bag, it indicates that the heat seal of the bag is very poor and easy to break in the production process. If it is torn from the edge of the aluminum foil bag, it indicates that the heat sealing quality is better.
Secondly, it depends on the composite firmness of food packaging bags. The method is to see how many layers of structure there are at the crack, and then see whether it can be separated by hand. If it is not easy to separate, it indicates that the vacuum packaging bag has good composite firmness, and it can be separated with a gentle pull, indicating poor quality; Therefore, checking the firmness of the aluminum foil bag depends on whether there are bubbles or wrinkles on the surface of the aluminum foil bag.
