Table 2.

Process parameters.

Process Parameter	PA 6	PA 66	PA 9T
Injection rate (mm/s)	50	50	50
Injection pressure (MPa)	80	80	170
Cooling time (s)	20	20	25
Mold temperature (°C)	90	90	140
Holding time (s)	20	20	15
Barrel temperature—Zone 1 (°C)	220	245	295
Barrel temperature—Zone 2 (°C)	230	260	305
Barrel temperature—Zone 3 (°C)	245	275	315
Barrel temperature—Zone 4 (°C)	255	285	325