| Grade | Preliminary drying | Barrel temperature(℃) | Screw rotation (rpm) | Back pressure (MPa) | Mold temperature (℃) | |||
|---|---|---|---|---|---|---|---|---|
| Nozzle | C3 | C2 | C1 | |||||
| Talc-reinforced GF-reinforced Conductive |
3 - 5hrs 80 - 120℃ |
180 - 230 | 180 - 230 | 160 - 210 | 140 - 190 | 70 - 90 | 5 - 20 | 40 - 60 |
| Flame-retardant | 3 - 5hrs 80 - 120℃ |
180 - 220 | 180 - 220 | 160 - 200 | 140 - 180 | 70 - 90 | 5 - 20 | 40 - 60 |
※Remarks
PP originally does not absorb water, however, please be sure that
preliminary drying is necessary to get excellent surface appearance of
moldings.
Without preliminary drying, silver streaks often arise especially in
molding of the flame retardant grades.
Please note long hours molding at high temperature often causes degradation
of plastics and resultant unevenness of color of moldings.
*“CELPURGE” is recommendable for purging of DAICEL PP.
