Food vacuum packaging bags are generally: PA/PEorPA/RCPP, PET/PEor PET/RCPPThere are also three or four layers, in order to increase the material texture performance:PET/PA/PE,PET/AL/RCPP,PA/AL/RCPP, PET/PA/AL/RCPPFood vacuum bag features: 1, High barrier: Utilize the high barrier properties of different plastic materials to co-extrude films to achieve high barrier effects on oxygen, water, carbon dioxide, and odors. 2, Stable performance: oil resistance, moisture resistance, low temperature freezing resistance, quality preservation, freshness preservation, odor preservation, can be used for vacuum packaging, aseptic packaging, inflatable packaging. 3, Low cost: Compared with glass packaging, aluminum foil packaging and other plastic packaging, to achieve the same barrier effect, co-extrusion film has a greater advantage in cost. Due to the simple process, the cost of the produced film product can be reduced compared with dry composite film and other composite films10-20% 4, Flexible specifications: can meet your different needs for different products. 5High strength: The co-extruded film has the characteristics of stretching during processing, and the strength of the plastic can be increased correspondingly after stretching, and plastic materials such as nylon and polyethylene can also be added in the middle to make it have a composite strength exceeding that of ordinary plastic packaging. There is no delamination and peeling phenomenon, good flexibility and excellent heat sealing performance. 6, Small volume ratio: the co-extrusion film can be vacuum shrink packaged, and the volume-to-volume ratio is close to100%, which is unmatched by glass, tin cans and paper packaging. 7, No pollution: no binder is added, no residual solvent pollution, green and environmental protection.Moisture-proof bag manufacturers tell you that vacuum packaging bags are moisture-proof+anti-static+Explosion-proof+Corrosion+insulation+energy saving+single perspective+UV protection+low cost+Volume ratio is small+pollution-free+High barrier effect.