YanShan Chemical PP K1001 Made Qf High-quality Materials Low Water Absorption Good Coloring Dimensional1

Products Description

PP Yanshan Petrochemical k1001 ultra-low melt index 1 homopolymer plastic sheet pipe grade 

injection molding PP raw material

1. Drying: drying is not required if the storage is appropriate.
2. Melting temperature: the melting point of PP is 160-175 ℃, and the decomposition temperature is 350 ℃, but the temperature setting during injection processing cannot exceed 275 ℃. The temperature of the melting section should preferably be 240 ℃.
3. Mold temperature: the mold temperature is 50-90 ℃. For those with high size requirements, use high mold temperature. The core temperature is more than 5 ℃ lower than the cavity temperature.
4. Injection pressure: higher injection pressure (1500-1800bar) and pressure holding pressure (about 80% of the injection pressure) are used. Turn to pressure maintaining at about 95% of the full stroke, and use a longer pressure maintaining time.
5. Injection speed: In order to reduce internal stress and deformation, high-speed injection should be selected, but some grades of PP and mold are not applicable (bubbles and air wrinkles). If there are light and dark stripes diffused by the gate on the surface with patterns, low-speed injection and higher mold temperature shall be used.