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Plastics & Elastomers
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Technical Datasheet | Supplied by Mitsui Chemicals
LUBMER™ L4640 by Mitsui Chemicals is a filled, halogen- and PFOA- free ultra-high molecular weight polyethylene (UHMWPE) grade. It is a self-lubricating, noiseless and food contact acceptable grade with low water absorption. Exhibits low friction and good resistance to wear and chemicals including alcohols, alkalis, oils, hydrogen peroxide, sulfuric and phosphoric acid. Applicable materials for modified LUBMER™ include PA6, PA66, Aromatic PA, POM, PBT, PET, PC, ABS and PPS. LUBMER™ L4640 provides good moldability, good dimensional stability and electrical insulating properties, high mechanical properties and innovative processability. It effectively improves sliding property in low dosage, better than PTFE or molybdenum disulfide. It also improves abrasion resistance for higher durability and robust material. It contributes to increased production efficiency and total cost reduction in a co-extrusion process. LUBMER™ L4640 can be used for the replacement for PTFE or as a tribology modifier of engineering plastics. Designed for processing by injection molding, extrusion or insert mold for grease-less, light weight gears and bearings.
Product Type
PE (Polyethylene) > UHMWPE
Physical Form
Light brown
Product Status
Applications/ Recommended for
  • Gears
  • Extrusion > Coextrusion
  • Injection molding - thermoplastics
Key Features
  • Abrasion resistance, Good
  • Alcohol Resistant
  • Alkali Resistant
  • Cost Effective
  • Dimensional stability, Good
  • Durable
  • Electrically Insulating
  • Filled
  • Food Contact Acceptable
  • Friction, Low
  • Halogen Free
  • Lubricating, Self
  • Mechanical Properties, Good
  • Moldability, Good
  • Molecular Wt., Ultra High
  • Noise Damping
  • Oil Resistant
  • Processability, Good
  • Water Absorption, Low to None
  • Wear resistance, Good
  • Sliding

LUBMER™ L4640 Properties

Physical Properties

Value & Unit
Test Condition
Test Method
Melt Mass-Flow Rate (MFR or MFI = Melt Flow Index or MI = Melt Index)
7 g/10 min
(At 190°C, 10 kgf)
MCI Method
1105 kg/m3
( )
ASTM D1505

LUBMER™ L4640 Processing Guidelines

Injection Molding Properties

Value & Unit
Test Condition
Test Method
Nozzle Temperature
240 °C
Injection Pressure
50 MPa
Injection Time
2 - 4 s

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