TYPICAL PROPERTIES of POLYETHYLENE
|
| ASTM or UL test |
Property |
LDPE |
HDPE |
UHMW |
| PHYSICAL |
| D792 |
Density (lb/in³)
(g/cm³) |
0.033
0.92 |
0.035
0.95 |
0.034
0.93 |
| D570 |
Water Absorption, 24 hrs (%) |
<0.01 |
0 |
0 |
| MECHANICAL |
| D638 |
Tensile Strength (psi) |
1,800-2,200 |
4,600 |
3,100 |
| D638 |
Tensile Modulus (psi) |
- |
- |
125,000 |
| D638 |
Tensile Elongation at Yield (%) |
600 |
900 |
- |
| D790 |
Flexural Strength (psi) |
- |
- |
- |
| D790 |
Flexural Modulus (psi) |
- |
200,000 |
125,000 |
| D695 |
Compressive Strength (psi) |
- |
- |
2,000 |
| D695 |
Compressive Modulus (psi) |
- |
- |
- |
| D785 |
Hardness, Shore D |
D41-D50 |
D69 |
D62-D66 |
| D256 |
IZOD Notched Impact (ft-lb/in) |
No Break |
3 |
No Break |
| THERMAL |
| D696 |
Coefficient of Linear Thermal Expansion
(x 10-5 in./in./°F) |
3 |
6 |
11 |
| D648 |
Heat Deflection Temp (°F / °C)
at 66 psi
at 264 psi |
120 / 48
105 / 36 |
170 / 76
150 / 40 |
203 / 95
180 / 82 |
D3418 |
Approx. Melting Temperature (°F / °C) |
230 / 110 |
260 / 125 |
280 / 138 |
- |
Max Operating Temp (°F / °C) |
160 / 71 |
180 / 82 |
180 / 82 |
| C177 |
Thermal Conductivity
(BTU-in/ft²-hr-°F)
(x 10-4 cal/cm-sec-°C) |
-
-
|
-
-
|
2.92
10.06
|
| UL94 |
Flammability Rating |
n.r. |
n.r. |
H-B |
| ELECTRICAL |
| D149 |
Dielectric Strength (V/mil) short time,
1/8" thick |
460-700 |
450-500 |
900 |
| D150 |
Dielectric Constant at 1 kHz |
2.25-2.30 |
2.30-2.35 |
2.30-2.35 |
| D150 |
Dissipation Factor at 1 kHz |
0.0002 |
0.0002 |
0.0002 |
| D257 |
Volume Resistivity (ohm-cm) at 50% RH |
1015 |
1015 |
1018 |
| D495 |
Arc Resistance (sec) |
135-160 |
200-250 |
250-350 |
