Krefine is a conductive polymer composite consisting of conductive fillers (i.e., carbon black, carbon fiber, graphite, metal fiber) suspended in an insulating polymer.
| Mechanical | ASTM Test Method | Krefine EKH-SS07 | Krefine EKH-SS09 | Krefine EKH-SS11 | Units |
|---|---|---|---|---|---|
| Strength to Weight Ratio | - | - | - | - | ksi |
| Specific Gravity @73 F | D792 | 1.33 | 1.31 | 1.31 | - |
| Tensile Strength @73 F, (ult)/(yld) | D638 | 140 | 135 | 110 | psi |
| Tensile Modulus of Elasticity @73 F | D638 | - | - | - | psi |
| Tensile Elongation at Break @73 F | D638 | 2.5 | 3.0 | 3.5 | % |
| Flexural Strength @73 F | D790 | 200 | 190 | 170 | psi |
| Flexural Modulus of Elasticity @73 F | D790 | 10,000 | 8,000 | 6,000 | psi |
| Shear Strength @73 F | D732 | - | - | - | psi |
| Comprehensive Strength, (% Deformation) @73 F | D695 | 180 | 172 | 155 | psi |
| Comprehensive Modulus of Elasticity @73 F | D695 | 9,000 | 7,500 | 5,820 | psi |
| Hardness, Rockwell, Scale as noted @73 F | D785 | M-125 | M-125 | M-125 | - |
| Hardness, Durometer, Shore D @73 F | D2240 | - | - | - | - |
| Izod Impact, (Notched) @73 F | D256 Type A | 30 | 30 | 30 | ft-lb/in of notch |
| Coefficient of Friction, (Dry vs Steel) Dynamic | - | - | - | - | - |
| Limiting PV, (with 4 to 1 factor of safety applied) | - | - | - | - | psi-ft/min |
| Thermal | ASTM Test Method | Krefine EKH-SS07 | Krefine EKH-SS09 | Krefine EKH-SS11 | Units |
|---|---|---|---|---|---|
| Coefficient of Linear Thermal Expansion @73 F | E-831 (TMA) | 1.5 | 1.5 | 1.5 | in/in/F |
| Heat Deflection Temperature @264 psi | D648 | 305 | 305 | 280 | F |
| Tg-Glass transition termperature, (Amorphous) | D3418 | 143 | 143 | 143 | F |
| Melting Point, (VS=Vicat Softening Temp.) | D3418 | - | - | - | F |
| Continuous Service Temperature in Air, (Max.) | - | 260 | 260 | 260 | F |
| Thermal Conductivity | - | - | - | - | BTU-in/hr-ft2-F |
| Electric | ASTM Test Method | Krefine EKH-SS07 | Krefine EKH-SS09 | Krefine EKH-SS11 | Units |
|---|---|---|---|---|---|
| Dielectric Strength, Short Term | D149 | - | 2 | 5 | Volts/mil |
| Volume Resistivity | D257 | 10 E6-7 | 10 E7-9 | 10 E9-11 | ohm-cm |
| Dielectric Constant @10E6 Hz | D150 | 7.9 | 6.6 | 5.3 | - |
| Dissipation Factor @10E6 Hz | D150 | 0.22 | 0.21 | 1.16 | - |
| Flammability @3.1 mm unless noted | UL94 | V-0 | V-0 | V-0 | - |
| H2O | ASTM Test Method | Krefine EKH-SS07 | Krefine EKH-SS09 | Krefine EKH-SS11 | Units |
|---|---|---|---|---|---|
| Water Absorption, Immersion, 24 hours | D570(7) | 0.4 | 0.4 | 0.4 | % by weight |
| Water Absorption, Saturation | D570(7) | 0.6 | 0.6 | 0.6 | % by weight |