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. |
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