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Grade: LUBMER™ L4000
Formula: UHMWPE, HMPE, HPPE
Form: Granule
Material: Polyethylene (PE)
CAS Number: 9002-88-4
Commodity: Polymers
Nominal Granule Size: 3mm

LUBMER™ L4000 UHMWPE Granules

LUBMER™ L4000 UHMWPE Granules are a high-performance ultrahigh-molecular-weight polyethylene formulation distinguished by its remarkable wear resistance, excellent impact strength, and outstanding resistance to chemicals and environmental stress cracking. The material’s inherent self-lubricating properties minimize friction and extend service life in dynamic systems, while its toughness makes it ideal for demanding load-bearing and abrasive conditions. Primary application areas include biomedical implants, industrial machinery, and electrical insulation, with widespread use in orthopedic prosthetics, sliding bearings, and impact-resistant structural parts. Specific technologies benefiting from LUBMER™ L4000 include artificial joint replacements where ultra-low wear rates are essential, composites with conductive fillers for electromagnetic interference shielding, and lightweight ballistic protection textiles. In research and innovation, it plays a pivotal role in developing advanced composites with enhanced thermal, mechanical, and electrical functionalities, enabling progress in aerospace, automotive, and medical device industries. The material’s unique balance of durability, safety, and adaptability underscores its critical value in both industrial applications and cutting-edge scientific exploration.
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Material Properties for Polymers

Chemical Resistance
Element Value
Acids - concentrated Good-Fair
Acids - dilute Good
Alcohols Good
Alkalis Good
Aromatic hydrocarbons Fair
Greases and Oils Good-Fair
Halogenated Hydrocarbons Fair-Poor
Halogens Fair-Poor
Ketones Good-Fair
Mechanical Properties
Element Value
Coefficient of friction 0.1-0.2
Hardness - Rockwell R50-70
Poisson's ratio 0.46
Elongation at break( % ) 500
Tensile modulus( GPa ) 0.2-1.2
Izod impact strength( J m⁻¹ ) 1000
Tensile strength( MPa ) 20-40
Electrical Properties
Element Value
Dielectric constant @1MHz 2.3
Dissipation factor @ 1MHz 1-10x 10⁻⁴
Dielectric strength( kV mm⁻¹ ) 28
Surface resistivity( Ohm/sq ) 10¹³
Volume resistivity( Ohmcm ) 10¹⁸
Physical Properties
Element Value
Flammability HB
Radiation resistance Fair
Resistance to Ultra-violet Poor
Limiting oxygen index( % ) 17
Water absorption - over 24 hours( % ) 0.01
Density( gcm⁻³ ) 0.94
Thermal Properties
Element Value
Heat-deflection temperature - 0.45MPa( C ) 69
Heat-deflection temperature - 1.8MPa( C ) 42
Upper working temperature( C ) 55-95
Specific heat( J K⁻¹ kg⁻¹ ) 1900
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.42-0.51@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 130-200

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