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Polyurethane Elastomer, Ether Based
Material Notes:
Polyurethane
elastomer is a polytetramethylene glycol ether based polyurethane elastomer
featuring superior resilience, low temperature properties, low compression set,
excellent hydrolytic stability, and resistance to attack by microorganisms. Its
typical applications include wheels, seals, and gaskets.
| Physical
Properties |
Metric |
English |
Comments |
|
|
| Density |
1.14 g/cc |
0.0412 lb/in³ |
|
Mechanical Properties |
|
|
| Hardness, Shore A |
88 - 96 |
88 - 96 |
ASTM D2240 |
| Hardness, Shore D |
43 - 51 |
43 - 51 |
ASTM D2240 |
| Tensile Strength at Break |
44.8 MPa |
6500 psi |
Tensile stress at
break. |
| Elongation at Break |
450 % |
450 % |
|
| 50% Modulus |
0.00758 GPa |
1.1 ksi |
|
| 100% Modulus |
0.0112 GPa |
1.62 ksi |
|
| 300% Modulus |
0.0248 GPa |
3.6 ksi |
|
| Flexural Modulus |
0.0758 GPa |
11 ksi |
|
| Tear Strength |
133 kN/m |
759 pli |
|
| Taber Abrasion, mg/1000 Cycles |
10 |
10 |
H22 Wheel |
| Compression Set |
25 % |
25 % |
23°C. |
| Compression Set, Elevated
Temperature |
28 % |
28 % |
70°C |
| Tensile Set |
30 % |
30 % |
Elongation set after
break |
Thermal Properties |
|
|
| CTE, linear 20°C |
152 µm/m-°C |
84.4 µin/in-°F |
|
| Vicat Softening Point |
106 °C |
223 °F |
|
| Glass Temperature |
-25 °C |
-13 °F |
|
| Clash-Berg Stiffness Temperature |
7.78 °C |
46 °F |
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