Materials and Tools
PK (Polyketone)
PK: A proprietary polymer blend comprised mainly of polyetheretherketone (PEEK). PK demonstrates all of the superior chemical resistance of PEEK (see PEEK above). The proprietary blend will however, allow a fitting to attain a higher pressures while reducing the cold flow properties of pure PEEK. CAUTION: some fittings molded of PK are known to be conductive. Use caution when employing PK fittings in high voltage applications.
| Temperature Range | Temperature limit for PK is 200 °C, 392 °F |
|---|---|
| Thread Strength | Excellent |
| pH Range | 0 - 14 |
| Sterilization Techniques | gamma irradiation; ethylene oxide; thermal |
| Autoclavable? | Y |
PK Extended Properties
| General | Methods | Units | ||
|---|---|---|---|---|
| Relative Density | ASTM D792 | - | 1.45 | |
| Mold Shrinkage | - | mil/in | 2-8 | |
| Mechanical | Methods | Units | ||
| Tensile Strength | @ 73 °F (yield) | ASTM D638 | psi | 30,000 |
| Elongation at Yield | @ 73 °F | ASTM D638 (5mm/min) | % | 1.5 |
| Flexural Modulus: | @ 73 °F | ASTM D790 | psi | 2,300,000 |
| Flexural Strength | @ 73 °F | ASTM D790 | psi | 44,000 |
| IZOD Impact Strength | @ 73 °F Notched Unnotched |
ASTM D256 | ft.-lb./in. | 1.2 11 |
| Thermal | Methods | Units | ||
| Coefficient of Thermal Expansion: | |
ASTM D696 | 10-5 °F- | 4 |
| Heat Deflection Temperature, 264 psi | ASTM D648 | °F (°C) | 634(334) |