Custom-made food packaging bags are a job that many food manufacturers must do. Food packaging bags are a kind of plastic flexible packaging bags that are very common in our daily life. It is the food that is sold after being packaged in this food packaging bag. Many customers who are customizing food packaging bags for the first time do not understand the material of packaging bags. Let’s analyze them: food bags, food packaging bags 1. Biaxially oriented polypropylene BOPP: high transparency, stretch resistance, cold resistance, heat resistance, – 40 degrees -120 degrees 2. Biaxially oriented polypropylene matting film: a film with low reflectivity, translucent and matting effect. 3. Casting polypropylene CPP: good gloss, good transparency, with heat-sealability, casting high-temperature film is suitable for retort packaging 4. Polyethylene PE: transparent, good gloss, heat-sealing, cold resistance 5. Polyester film PET: has tension resistance, heat resistance of 60-150 degrees, good air tightness, suitable for cooking, no heat sealing 6, nylon PA or NY: colorless, high transparency, cold resistance, heat resistance, oil resistance, can be cooked. It is easy to absorb moisture and has no heat sealability. When customizing food packaging bags, you should know that the packaging bags are made of the above single materials, such as OPP composite CPP. This combination is very suitable for the packaging of some small foods. Its main feature is brightness High, good transparency, exquisite printing, moisture-proof, oxygen-proof. [Vacuum bag]