PEEK is a Semi – crystalline thermoplastic with excellent mechanical and chemical resistance properties that are retained to high temperature . The processing condition used to mould PEEK can influence the crystallinity , and hence the mechanical properties .
Peek ‘s mechanical properties at elevated temperature have led to it being used in at least two varieties of extruder as thermal insulation . This means the main mechanical structure of the extruder can be made of the same material that is being extruded , provided that the PEEK insulator prevents heat from travelling beyond intended melt zone .A disadvantage is the high price , which limits its application to high value items .
| Standard Diameter (mm) | 10mm to3 5mm to 300mm |
| Standard Length (mm) : | 300mm , 600mm, 1000mm |
| UNITS | ASTM Test | PEEK | PEEK 30% GLASS –FILLED |
|
| Tensile strength psi D638 4,000 | Psi | D638 | 14000 | 24,620 |
| Flexural modulus | Psi | D790 | 590000 | 1,450,000 |
| Izod impact (notched) | ft-lbs/in of notch | D256 | 1.6 | 1.84 |
| Heat deflection temperature@264 psi | °F | D648 | 306 | 599 |
| Maximum continuous service temperature in air | °F | 480 | 482 | |
| Water absorption (immersion 24 hours) | % | D570 | 0.50 | 0.11 |
| Coefficient of linear thermal expansion | in/in/°Fx10-5 | D696 | 2.6 | 1.2 |
| Coefficient of friction (dynamic) | 0.25 | 0.30 |
