Pyramid™ PEKK KD4219


Pyramid™ PEKK KD4219      
Carbon Fiber      
Product Description
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.
Filler / Reinforcement  Carbon Fiber
Additive  Lubricant
Features  Flame Retardant Good Wear Resistance Machinable
Good Chemical Resistance High Stiffness Semi Crystalline
Good Dimensional Stability High Strength  
Good Toughness Low Moisture Absorption  
Uses  Machinery Maintenance/Repair
Appearance  Black
Forms  Pellets Preformed Parts  
Processing Method  Compression Molding Extrusion Injection Molding

Physical Nominal Value Unit Test Method
Specific Gravity 1.46 g/cm³ ASTM D792
Water Absorption (24 hr) 0.040 % ASTM D570
Hardness Nominal Value Unit Test Method
Rockwell Hardness (M-Scale) 90   ASTM D785
Durometer Hardness (Shore D) 84   ASTM D2240
Mechanical Nominal Value Unit Test Method
Tensile Modulus 12400 MPa ASTM D638
Tensile Strength (Break) 172 MPa ASTM D638
Tensile Elongation (Break) 2.0 % ASTM D638
Flexural Modulus 12400 MPa ASTM D790
Flexural Strength (Yield) 248 MPa ASTM D790
Compressive Strength 221 MPa ASTM D695
Shear Strength 138 MPa ASTM D732
Coefficient of Friction     ASTM D1894
vs. Steel - Dynamic 0.17    
vs. Steel - Static 0.11    
Impact Nominal Value Unit Test Method
Notched Izod Impact (3.18 mm) 53 J/m ASTM D256
Unnotched Izod Impact (3.18 mm) 640 J/m ASTM D256
Thermal Nominal Value Unit Test Method
Deflection Temperature Under Load (1.8 MPa, Unannealed) 260 °C ASTM D648
Glass Transition Temperature 160 °C DSC
Melting Temperature 360 °C DSC
CLTE - Flow (-40 to 149°C) 4.5E-5 cm/cm/°C TMA
Thermal Conductivity 0.25 W/m/K ASTM C177
Electrical Nominal Value Unit Test Method
Surface Resistivity < 1.0E+8 ohms ASTM D257
Flammability Nominal Value Unit Test Method
Flame Rating (3.18 mm) V-0   UL 94
Additional Information Nominal Value Unit  
Limiting Pressure Velocity 2 142000 J/m  
24:1 safety factorp      

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