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Food packaging bag specification size and material model standard reference

The most important food packaging is PP and PE, which are polypropylene and polyethylene plastics. Two kinds of safety performance can satisfy food packaging. The issue of bisphenol A has been heatedly debated on the issue of children's development. Some countries have banned the use of bisphenol A in food packaging plastics. Compared with non-food packaging, PP and PE do not contain plastic additives and will not release toxic substances during use. PE is soft and has poorer mechanical properties than PP. Representative products include shopping bags, plastic wrap, garbage bags, etc. in general supermarkets. PP is relatively hard, anisotropic (it is easy to tear if there is a gap), good mechanical properties, high temperature performance is better than PE, and it is representative of bread bags. Generally according to the material structure, the inner layer is PE or CPP, the outer layer is PA, PET, the middle layer may be EVOH, or PVDC, etc., and some use aluminized film or aluminum foil. Aluminum foil bag, plastic packaging bag Reason: PE and CPP have better heat sealability, that is, they are easy to seal. PA and PET have good printability and are used on the outer layer to print pictures. PVDC and EVOH have better barrier properties to prevent oxidation.
Aluminized film, aluminum foil has good light-shielding properties, and is more suitable for products that are not easy to see light. Tea packaging bags and composite packaging bags have different properties and uses of various materials. Generally, food packaging bags are not made of a single material, but are usually multi-layered. Dry goods and frozen goods generally use PET/PE. For high-temperature cooking, nylon composite CPP is generally used, or other composites. The red casing of ham sausage is a single material PVDC. Candy and chocolate are generally made of transparent paper/PP, kraft paper/PE/Al/PE, Al/PE, etc.
Vacuum packaging bags 1. The materials used in common food packaging bags are divided into six categories: 1. Material: BOPP/LLDPE two-layer composite properties: moisture-proof, cold-resistant, low-temperature heat-sealing and strong tension Uses: instant noodles, snacks, frozen snacks, powder Packaging, etc. 2. Material: BOPP/CPP two-layer composite characteristics: moisture-proof, oil-resistant, high transparency, good stiffness Uses: instant noodles, biscuits, candies, all kinds of light food 3. Material: BOPP/VMCPP composite characteristics: moisture-proof, oil-resistant, Oxygen barrier, light shading, good stiffness
Uses: all kinds of dry food, fried food, potato chips 4. Material: BOPP/VMPET/LLDPE three-layer composite Features: moisture-proof, oxygen barrier, light-shielding Uses: all kinds of food, rice snacks, snacks, tea 5. Material: PET /CPP two-layer composite characteristics: moisture-proof, oxygen barrier, fragrance preservation, high temperature resistance Application: cooking, food containing alcohol, scented food 6. Material: PET/PET/CPP three-layer composite characteristics: moisture-proof, high temperature resistance, easy sealing Uses: powder packaging, soy sauce, liquid, shampoo 2. Food packaging bag specifications: different manufacturers have different requirements, and some customers may require looser products with the same size, while others want to be more compact. Customers need to negotiate with manufacturers on customized sizes Communicate and choose the most suitable specification. Customers choose general specifications, transparent vacuum bags and other products. .packaging bag