https://www.avient.com/sites/default/files/2022-06/Maxxam FR Injection Molding Processing Guide.pdf
Barrel Temperatures °F (°C) PP Mineral-Filled PP Glass-Filled PP HDPE LDPE Rear Zone 360–390 (182–200) 400–420 (204–216) 415–435 (213–224) 400–420 (204–216) 370–390 (188–199) Center Zone 370–400 (188–204) 410–430 (210–221) 425–445 (218–229) 410–430 (210–221) 380–400 (193–204) Front Zone 390–410 (200–210) 420–440 (216–227) 435–455 (224–235) 420–440 (216–227) 390–410 (199–210) Nozzle 400–425 (204–219) 415–435 (213–224) 430–450 (221–232) 430–450 (221–232) 400–425 (204–219) Melt Temperature 400–425 (204–219) 415–435 (213–224) 430–450 (221–232) 430–450 (221–232) 400 - 425 (204–219) Mold Temperature °F (°C) 60–120 (16–49) Pack & Hold Pressure 50–75% of injection pressure Injection Velocity (in/s) 1.0–3.0 Back Pressure (psi) 50–100 Screw Speed (rpm) 30–100 Drying Parameters Hours @ °F (°C) Not typically required.