This extruded material offers good corrosion resistance and low moisture permeability. It can be used in applications where corrosion resistance is important, but stiffness, high temperature, and structural strength are not. A highly flexible product, LDPE is used widely in orthopedic products, or where mobility without stress fatigue is desired. LDPE is also frequently used in consumer packaging, bags, bottles, and liners
| 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
0.96 |
0.034
0.93 |
| D570 | Water Absorption, 24 hrs (%) | <0.01 | <0.01 | <0.01 |
| MECHANICAL | ||||
| D638 | Tensile Strength (psi) at 72°F | 1,400 | 4,600 | 5,800 |
| D638 | Tensile Strength (psi) at 150°F | 400 | 400 | 400 |
| D638 | Tensile Modulus (psi) | 57,000 | 200,000 | 80,000 |
| D638 | Tensile Elongation at Break (%) | 100 | 400 | 300 |
| D790 | Flexural Strength at Yield (psi) | 1,500 | 4,600 | 3,500 |
| D790 | Flexural Modulus (psi) | 29,000 | 174,000 | 88,000 |
| D695 | Compressive Strength (psi) | 1,400 | 4,600 | 3,000 |
| D695 | Compressive Modulus (psi) | 54,000 | 100,000 | 80,000 |
| D732 | Shear Strength (psi) | – | – | 3,000 |
| D785 | Hardness, Shore D | D45 | D69 | D62-D66 |
| D256 | IZOD Notched Impact (ft-lb/in) | No Break | 1.3 | No Break |
| THERMAL | ||||
| D696 | Coefficient of Linear Thermal Expansion (x 10-5 in./in./°F) | – | 6 | 11 |
|
D648 |
Heat Deflection Temp (°F / °C) at 66 psi
at 264 psi |
120 / 48 116 / 46 |
170 / 76 176 / 80 |
203 / 95 180 / 82 |
| D3418 | Approx. Melting Temperature (°F / °C) | 244 /
118 |
260 /
125 |
275 /
136 |
| – | 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) |
– – |
– – |
2.84 10.0 |
| UL94 | Flammability Rating | HB | HB< | HB |
| ELECTRICAL | ||||
| D149 | Dielectric Strength (V/mil) short time, 1/8″
thick |
460-700 | 450-500 | 2300 |
| D150 | Dielectric Constant at 1 MHz | 2.25-
2.30 |
2.30-
2.35 |
2.30-
2.35 |
| D150 | Dissipation Factor at 1 kHz | 0.0002 | 0.0002 | 0.0005 |
| D257 | Surface Resistivity (ohm/square) at 50% RH | > 1015 | > 1015 | > 1015 |
| D495 | Arc Resistance (sec) | 135-160 | 200-250 | 250-350 |
Specification: LD FILM-POLYMERC-243000
|
There are no reviews yet.