In the multiple layout of plastic packaging, polypropylene (PP) packaging bags and polyvinyl chloride (PVC) packaging bags with their unique performance characteristics, separate one side, serving different industrial and life packaging needs, the difference between the two is clear and decisive.

 

From the basic composition and safety of the material, PP is made of propylene monomer polymerization, is a non-toxic, odorless and excellent chemical stability of polymer materials, in food, medicine and other stringent requirements for health standards in the packaging field is widely accepted. For example, the inner packaging of many snacks and health products often uses PP material to ensure that the products will not be contaminated by harmful ingredients in the storage and circulation process. In contrast, PVC, although strong plasticity, can flexibly adjust the performance through additives, but because of its synthesis and processing may remain in the process of vinyl chloride monomer and other toxic substances, in direct contact with food applications are limited, more for non-edible products, such as industrial parts, stationery, clothing and other packaging scenes.

 

In terms of physical properties, PP material has outstanding high temperature resistance characteristics, melting point up to 160℃ -170 ℃, which makes it resistant to high temperature sterilization, cooking and other processing processes, in the need of hot filling or high temperature sterilization of food packaging, such as sauces, cooked food products packaging excellent performance; And light texture, good mechanical strength, tensile strength, excellent impact resistance, made of packaging bags crisp and durable. PVC according to the amount of plasticizer added different, flexible hardness, hard texture without plasticizer, can make pipe products, add a lot of plasticizer after becoming soft, made of packaging bag flexibility is good, in low temperature environment can also maintain a certain elasticity, but the overall heat resistance is less than PP, high temperature deformation, release harmful gases.

 

Processing technology dimension, PP molding shrinkage rate is relatively low, easy injection molding, blow molding, low energy consumption, high efficiency, can quickly produce unified specifications, stable quality packaging bags. PVC processing is more complex, dependent on processing AIDS, the need to accurately control the plasticizing temperature, pressure and time, to ensure that the plasticizer is evenly dispersed, product performance standards, but it can rely on a variety of molds to create a complex shape, beautiful appearance of packaging bags, in the visual display requirements of high product packaging has unique advantages.

With their respective characteristics, PP and PVC bags show their length on the suitable packaging track, and jointly outline the rich picture of plastic packaging.In the multiple layout of plastic packaging, polypropylene (PP) packaging bags and polyvinyl chloride (PVC) packaging bags with their unique performance characteristics, separate one side, serving different industrial and life packaging needs, the difference between the two is clear and decisive.

From the basic composition and safety of the material, PP is made of propylene monomer polymerization, is a non-toxic, odorless and excellent chemical stability of polymer materials, in food, medicine and other stringent requirements for health standards in the packaging field is widely accepted. For example, the inner packaging of many snacks and health products often uses PP material to ensure that the products will not be contaminated by harmful ingredients in the storage and circulation process. In contrast, PVC, although strong plasticity, can flexibly adjust the performance through additives, but because of its synthesis and processing may remain in the process of vinyl chloride monomer and other toxic substances, in direct contact with food applications are limited, more for non-edible products, such as industrial parts, stationery, clothing and other packaging scenes.

In terms of physical properties, PP material has outstanding high temperature resistance characteristics, melting point up to 160℃ -170 ℃, which makes it resistant to high temperature sterilization, cooking and other processing processes, in the need of hot filling or high temperature sterilization of food packaging, such as sauces, cooked food products packaging excellent performance; And light texture, good mechanical strength, tensile strength, excellent impact resistance, made of packaging bags crisp and durable. PVC according to the amount of plasticizer added different, flexible hardness, hard texture without plasticizer, can make pipe products, add a lot of plasticizer after becoming soft, made of packaging bag flexibility is good, in low temperature environment can also maintain a certain elasticity, but the overall heat resistance is less than PP, high temperature deformation, release harmful gases.

Processing technology dimension, PP molding shrinkage rate is relatively low, easy injection molding, blow molding, low energy consumption, high efficiency, can quickly produce unified specifications, stable quality packaging bags. PVC processing is more complex, dependent on processing AIDS, the need to accurately control the plasticizing temperature, pressure and time, to ensure that the plasticizer is evenly dispersed, product performance standards, but it can rely on a variety of molds to create a complex shape, beautiful appearance of packaging bags, in the visual display requirements of high product packaging has unique advantages.

With their respective characteristics, PP and PVC bags show their length on the suitable packaging track, and jointly outline the rich picture of plastic packaging.