PP (polypropylene), called polypropylene in Chinese, is a polymer formed by free radical polymerization of propylene monomer. It has a non-toxic, odorless, and tasteless milky white highly crystalline shape and is a crystalline material. At present, there are many varieties of polypropylene resin produced in China, and the production of relatively large batches of flat fiber grade polypropylene, biaxially oriented polypropylene special resin (BOPP special material), injection grade polypropylene and ethylene propylene copolymer polypropylene, etc.
　　Characteristics of polypropylene (PP)
Polypropylene resin has the lowest density among general-purpose plastics. It has good mechanical properties, good rigidity, abrasion resistance, and high hardness; it has good heat resistance and poor cold resistance; it does not absorb water and has good chemical stability, but it is not resistant to sunlight. Poor thermal stability; flammable, smells of oil when burned; good electrical insulation, voltage resistance, transparent film, poor penetration of air and water vapor; good for forming films, silk and other products, but dyeing and printing , Poor adhesion.
　　 Polypropylene (PP) plastic products use
　　 One, film. Mainly used for packaging various food, industrial products, daily necessities and electrical components.
　　 2. Hollow products. Used to make containers for various liquid fuels, chemical liquids and daily chemicals.
　　 3. Injection molding products. Used in daily necessities and various mechanical parts.
　　 Fourth, all kinds of pipes, plates and sheet products. Mainly used for wire, cable sheath and thermoforming various grooves, etc.
　　 Five, flat belt and fiber. Used for packaging bundling items and various packaging woven tapes, etc.