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Do you know what material is the food packaging bag?

by:FAST SINCERE     2020-03-23
Many people don't know what materials are usually made of food packaging bags. Now Hongtai packaging gives you a brief explanation of what materials are made of food packaging bags. The main materials of food packaging are: PVDC (Polyvinylidene chloride), PE (Polyethylene), PP (Polypropylene), PA (Nylon), EVOH (Ethylene/vinyl alcohol copolymer), Aluminized film (Aluminum PE)And other major films. The production of the film can be divided into: Stretched film and blown film. At present, the main materials used in food packaging are PP and PE, that is, polypropylene and polyethylene plastics. For these two materials, both can meet the food packaging, and there are no reports of problems in the world. Compared with non-food packaging, PP and PE do not contain plastic additives. Everyone knows that plastic additives have a great impact on human body, especially children's health, PP and PE will not release toxic materials during use. Some other materials will cause cancer. PP and PE will not be used in PVC packaging, but because of insecurity, it is now gradually replaced by PE plastic wrap. The characteristics of PE are: soft, the mechanical properties are worse than PP, the representative products have general supermarket shopping bags, plastic wrap, garbage bags and so on. PP is hard, anisotropic (There is a gap that is easy to tear) The mechanical properties are good, and the high temperature performance is better than PE, which means that the product has a bread bag. Generally, according to the material structure, the inner layer is PE or CPP, the outer layer is PA and PET, and the middle layer may be EVOH or PVDC, etc. Some use aluminized film or aluminum foil. PE and CPP have good heat sealing property, which means they are easy to seal. PA and PET have good printability and can be used on the outer layer to print beautiful pictures. PVDC and EVOH have good barrier properties and prevent oxidation. Aluminized film, aluminum foil has good shading, suitable for products that are not suitable for light. Various materials have different properties and different uses. General Food packaging bags are not a single material, generally multi-layer composite, can be compounded with two layers, three layers, four layers and other dry goods can be frozen, generally used PET/PE. Nylon composite CPP, or other composite, is generally used for high-temperature cooking. The red casing of ham sausage is PVDC of a single material. Candy Chocolate is generally made of transparent paper/PP, Kraft paper/PE/AL/PE, AL/PE and other Shijiazhuang packaging
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