Westlake Plastics Lennite® Biocompatible Implant Grade UHMW-PE

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Westlake Plastics Lennite® Biocompatible Implant Grade UHMW-PE
Categories:	Polymer; Thermoplastic; Polyethylene (PE); High Density (HDPE); UHMW PE (Ultra High Molecular Weight PE)
Material Notes:	Lennite is a semi-crystalline white implant grade ultra high molecular weight polyethylene thermoplastic offering excellent wear resistance, low coefficients of static and dynamic friction high chemical resistance, and toughness. Lennite Ultra-High Molecular-Weight Polyethylene (UHMW-PE) is ram extruded bar stock that is made in accordance with ASTM specification F648 and International Standard ISO 5834-1 making it suitable for use in orthopedic implants. Information provided by Westlake Plastics.
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Physical Properties	Metric	English	Comments

Density	0.930 g/cc	0.0336 lb/in³	ASTM D792
Water Absorption	0.00 %	0.00 %	24 hrs.; ASTM D570

Mechanical Properties	Metric	English	Comments
Hardness, Shore D	61	61	ASTM D2240
Tensile Strength at Break	41.4 MPa	6000 psi	ASTM D638
Tensile Strength, Yield	19.3 MPa	2800 psi	ASTM D638
Elongation at Break	>= 350 %	>= 350 %	ASTM D638
Izod Impact, Notched	9.61 J/cm	18.0 ft-lb/in	Double 15° Notch at 73°F; ASTM D256

Electrical Properties	Metric	English	Comments
Volume Resistivity	>= 1.00e+16 ohm-cm	>= 1.00e+16 ohm-cm	ASTM D257
Dielectric Constant	2.3 @Frequency 60 Hz	2.3 @Frequency 60 Hz	ASTM D150
Dielectric Strength	90.0 kV/mm	2290 kV/in	ASTM D149
Dissipation Factor	0.00019 @Frequency 50 Hz	0.00019 @Frequency 50 Hz	ASTM D150

Thermal Properties	Metric	English	Comments
CTE, linear	198 µm/m-°C @Temperature 20.0 °C	110 µin/in-°F @Temperature 68.0 °F	ASTM D696
Deflection Temperature at 0.46 MPa (66 psi)	95.0 °C	203 °F	ASTM D648

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