Taihua's PP/ 1 120 hardness110; The flow rate is15g/10min; Samsung PP/BI740 hardness100; The flow rate is 25g/ 10min.
Large thin-walled parts such as Bolu Chemical PP/RJ470MO have a hardness of 90 and a flow rate of 70g/ 10min.
English name of polypropylene: polypropylene, abbreviated as PP, commonly known as: 100 times glue. Polypropylene is the representative of poly-α-olefin, which is a thermoplastic resin polymerized from propylene, and its monomer is propylene CH2 = CH-CH3. According to different initiators and polymerization processes, polypropylene can be divided into three configurations: isotactic polypropylene, atactic polypropylene and syndiotactic polypropylene. Isotactic polypropylene is easy to form crystalline state, the crystallinity is above 95%, and the molecular weight is between 80- 1.5 million, which gives it good heat resistance and solvent resistance. Random polypropylene is an amorphous and slightly sticky ash at room temperature, with a low molecular weight of 3000- 10000, irregular structure and lack of cohesion, so it is rarely used.