PET—-Through the improvement of nucleating agent, crystallizing agent and glass fiber reinforcement, PET has the following characteristics in addition to the properties of PBT.
1. The heat distortion temperature and long-term use temperature are the highest among thermoplastic general engineering plastics.
2. Because of its high heat resistance, reinforced PET is immersed in a solder bath at 250°C for 10s, and it hardly deforms or changes color. It is especially suitable for the preparation of soldered electronic and electrical parts.
3. The bending strength is 200MPa, the elastic modulus is 4000MPa, the creep resistance and fatigue resistance are also very good, the surface hardness is high, and the mechanical properties are similar to those of thermosetting plastics.
4. Since the price of ethylene glycol used in the production of PET is almost half cheaper than that of butanediol used in the production of PBT, PET resin and reinforced PET are the lowest price among engineering plastics and have high cost performance.
PP—Polypropylene (PP plastic) is another excellent resin variety developed after nylon. It is a linear polymer with high density, no side chain and high crystallinity, and has excellent comprehensive properties. White translucent, waxy when unpigmented; lighter than polyethylene. The transparency is also better than that of polyethylene, and it is harder than polyethylene.
The PET and PP broom filament extruding machine line designed and manufactured by Qingdao Zhuoya Machinery can make both high quality PET broom filament and PP broom filament, so our machine line is welcomed by customers all over the world.
Post time: Feb-28-2022