| About |
|---|
| Pyramid® KD4219 is a highly wear resistant, semi-crystalline thermoplastic compound that offers an outstanding combination of strength, toughness, chemical resistance and superior dimensional stability. Comprised of Polyetherketoneketone (PEKK) base resin reinforced with carbon fibers and proprietary lubricants, Pyramid® KD4219 is an ideal choice for sliding and rotational wear components used in environments with temperatures of up to 500°F. Benefits offered by Pyramid® KD4219: Outstanding Wear Resistance Limiting PV of 32,000 500°F Heat Deflection Temperature Rating @ 264 psi Extremely High Strength and Stiffness Excellent Dimensional Stability Very Good Resistance to Chemicals and Steam Low Moisture Absorption Flammability Rated UL V-0 Easy to Machine into complex configurations Pyramid® KD4219 is offered by Polymics in both resin pellets for injection molding or extrusion and near net shapes for machining. Resin pellets are packaged in boxes or gaylords. To meet the wide ranging needs of machinists and fabricators, Pyramid® KD4219 stock shapes are offered by Polymics in a wide array of both compression molded and injection molded shapes and sizes. Polymics’ offerings include plates in sizes from 10″x10″ to 12″x18″ and thicknesses from 1/4″ all the way to 2″, rods in diameters from ¼” to 5″ in lengths up to 18″ long and tubular bars and discs with outer diameters up to 15″. Injection molded shapes are available from existing tools in a wide variety of shapes and sizes.&& |
| Product Description | |
|---|---|
| Generic | PEKK |
| Material Status | Commercial: Active |
| Features | Good Rigidity,Good flexibility,Good Dimensional Stability,Machinable,Flame Characteristics,Hypocrystalline,Good wear resistance,Solvent resistance,Low moisture absorption |
| Availabilitys | North America |
| Process Methods | Injection Molding |
| Technical Data | |||
|---|---|---|---|
| PHYSICAL | Nominal value | Unit | Test method |
| Density | 1.46 | g/cm³ | ASTM D792 |
| Water absorption rate | |||
| 24hr | 0.040 | % | ASTM D570 |
| IMPACT | Nominal value | Unit | Test method |
|---|---|---|---|
| Impact strength of cantilever beam notch | |||
| 3.2mm | 53 | J/m | ASTM D256 |
| Notched impact strength of cantilever beam | |||
| 3.2 mm | 640 | J/m | ASTM D256 |
| THERMAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Hot deformation temperature | |||
| 1.8 MPa, unannealed | 260 | ℃ | ASTM D648 |
| Glass transition temperature | 160 | ℃ | DSC |
| Melting temperature | 360 | ℃ | DSC |
| Linear coefficient of thermal expansion | |||
| MD：-40~149℃ | 4.5E-5 | 1/℃ | TMA |
| Thermal conductivity coefficient | 0.25 | W/m/K | ASTM C177 |
| Electrical performance | Nominal value | Unit | Test method |
|---|---|---|---|
| Surface resistivity | < 1.0E+8 | ohms | ASTM D257 |
| FLAME CHARACTERISTICS | Nominal value | Unit | Test method |
|---|---|---|---|
| Flame retardant level | |||
| 3.20 mm | V-0 | UL 94 |
| Supplementary information | Nominal value | Unit | Test method |
|---|---|---|---|
| Pressure limiting speed | 142000 | J/m |
| MECHANICAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Shore hardness | |||
| Shaw’s D | 84 | ASTM D2240 | |
| Rockwell hardness | |||
| M-level | 90 | ASTM D785 | |
| Tensile modulus | 12400 | MPa | ASTM D638 |
| tensile strength | |||
| fracture | 172 | MPa | ASTM D638 |
| Tensile strain | |||
| fracture | 2.0 | % | ASTM D638 |
| Bending modulus | 12400 | MPa | ASTM D790 |
| bending strength | |||
| yield | 248 | MPa | ASTM D790 |
| compressive strength | 221 | MPa | ASTM D695 |
| shear strength | 138 | MPa | ASTM D732 |
| friction coefficient | |||
| Steel – Dynamic | 0.17 | ||
| Steel – Static | 0.11 |
| Notes |
|---|
| 1. Typical properties: these are not to be construed as specifications. |
| 2. 4:1 safety factorp |
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