Below are typical valves for various generic plastics. For more precise values, please consult your resin supplier.
| Material |
Extrusion |
Injection |
Mold Shrinkage
in Inches |
Specific
Gravity |
Density
Lbs/In |
| ABS |
435 |
500 |
.005 |
1.03 |
.037 |
| Acetel |
|
390 |
.020 |
1.41 |
.051 |
| Acrylic |
375 |
450 |
.0045 |
1.17 |
.0422 |
| FEP |
600 |
600 |
.010 |
2.11 |
.0775 |
| Nylon 6 |
520 |
550 |
.013 |
1.13 |
.0405 |
| Nylon 6/12 |
475 |
500 |
.011 |
1.07 |
.039 |
| Nylon 12 |
475 |
445 |
.003 |
1.04 |
.038 |
| Polycarbonate |
550 |
575 |
.006 |
1.20 |
.0434 |
| PBT |
|
460 |
.020 |
1.34 |
.0484 |
| PET |
480 |
490 |
.002 |
1.31 |
.0482 |
| HDPE |
410 |
480 |
.025 |
.955 |
.0345 |
| LDPE |
600 |
400 |
.027 |
.92 |
.033 |
| LLDPE |
500 |
425 |
.025 |
.92 |
.034 |
| Polypropolene |
450 |
490 |
.005/.018 |
.91 |
.033 |
| PVC-Rigid |
380 |
380 |
.025 |
1.29/1.4 |
.050 |
| PVC- Flexible |
365 |
300 |
.025 |
1.23/1.37 |
.050 |
| Polyurethane |
400 |
400 |
.02 |
1.2 |
.0433 |
| PTFE |
|
|
|
2.16 |
.0785 |
| Kynar |
|
|
|
|
|
