Food vacuum packaging materials

Vacuum packaging or vacuum inflatable packaging commonly used double-layer composite film or three-layer aluminum thin composite film three-side sealing packaging bag, the thickness of the composite film is generally between 60-96UM, wherein the inner layer is heat-sealing layer, need to have good Heat sealability, thickness between 50-80um, outer layer is a sealing layer, need to have good air tightness and printability, a certain strength, thickness between 10-16UM. Composite film inner layer substrate is commonly used Ethylene (PE), such as high temperature retort pouch with high temperature polypropylene (CPP), outer layer substrate commonly used stretch polypropylene (OPP), polyester (PET), nylon (PA), etc. Some foods such as tea, Milk powder and other high-fat foods need to use light-blocking packaging to prevent food from being affected by light and change color, aroma and taste. The method is to laminate a very thin aluminum foil (AL) between the inner and outer substrates. Air tightness has also been strengthened.