Injection Molding General Processing Guidelines

Materials	Shrinkage .125 in. wall	Specific Gravity	Drying Time	Drying Temp F	Mold Temp	Melt Temp
ABS	.005-.009	1.05	2-4 hrs.	180-200	100-180	390-540
ABS-PA	.010-.012	1.06	2-3 hrs.	175-190	70-200	460-530
ABS-PC	.006-.009	1.13	3-4 hrs.	175-230	140-210	486-562
ABS-TPU	.005-.010	1.12	4 hrs.	170	80-180	370-420
Acetal*	.018-.025	1.42	1-4 hrs.	160-185	180-220	380-430
Acrylic	.002-.008	1.19	2-3 hrs.	165-200	150-200	420-510
ASA	.004-.008	1.05	2 hrs.	180-190	100-180	486-552
ASA+AES	.004-.008	1.05	2 hrs.	180-190	100-180	486-552
GPPS*	.003-.005	1.05	2 hrs.	150	70-120	400-480
EVA*	.002-.005	.937-.964	2-4 hrs	140	60-110	350-450
PE*	.015-.050	.88-.965	1-2 hrs	120-150	60-110	360-525
HIPS*	.005-.008	1.05	1-2 hrs.	150-170	60-180	400-475
IONOMER	.002-.006	.957-.967	8 hrs	140	60-100	400-500
LCP	.000-.008	1.5-1.81	2-4 hrs.	275-300	85-280	660-710
Nylon 6	.015-.025	1.13	2-4 hrs.	180	160-220	460-550
Nylon 66	.015-.022	1,14	2-4 hrs.	175	160-240	520-580
Nylon 4/6	.004-.030	1.17-1.70	2-4 hrs.	250	180-300	580-590
Nylon 6/10	.003-.016	1.07-1.63	2-4 hrs.	180	165-220	480-530
Nylon 6/12	.001-.020	1.03-1.46	2-4 hrs.	180-200	165-220	450-580
PBT	.001-.023	1.31-1.72	2-4 hrs	200-250	150-250	450-490
PET	.001-.023	1.28-1.84	3-4 hrs	250-275	190-250	520-590
PC	.005-.008	1.2	4 hrs.	250	150-225	520-610
PC+PET	.006-.008	1.22	4-8 hrs.	210-250	65-200	530-560
PEEK	.0005-.007	1.37-1.70	2-16 hrs.	300-350	250-400	700-750
PEI	.0005-.002	1.27-1.61	2-15 hrs.	300	275-325	670-710
PES	.001-.005	1.37-1.70	2-16 hrs.	300	280-325	650-750
TPE	.008-.050	.875-1.34	2-4 hrs.	170-230	60-175	350-500
TPO*	.009-.018	.83-1.15	1-2 hrs.	120-180	60-150	350-500
PP-HP*	.012-.024	0.9	1-2 hrs.	120-150	70-120	400-500
PP-CP*	.012-.024	0.9	1-2 hrs.	120-150	70-120	375-525
PPO	.005-.008	1.04-1.06	2-4 hrs.	170-230	150-220	520-600
PPS	.001-.012	1.4-2.0	2-4 hrs.	300-350	275-325	600-650
PSU	.0005-.008	1.38-1.57	4-16 hrs.	275-325	250-325	650-750
TPUR	.001-.006	1.19-1.70	4-12 hrs.	180-280	150-250	420-530
TPU	.006-.020	1.04-1.30	2-4 hrs.	180-230	60-140	380-440
PVC (RIGID)*	.002-.006	1.23-1.54	2 hrs.	140-180	70-100	350-410
PVC (FLEX)*	.010-.025	1.13-1.72	2 hrs.	120-150	60-120	320-390
SAN	.001-.007	1.07	2-3 hrs.	180-200	100-200	425-500
SB*	.002-.010	1.01	1-2 hrs.	140-160	80-120	380-450
SMA	.002-.007	1.07	2 hrs.	180-200	120-180	470-550
Note: Check manufacturers’ recommendations for specific processing parameters. • Denotes materials that typically do not require pre-drying.

rotational molding machine

extruder

thermoformer