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Technical Datasheet | Supplied by Mitsui Chemicals
LUBMER™ LS4140 is an ultra-high molecular weight polyethylene (UHMWPE) by Mitsui Chemicals. Designed for lightweight gears and bearings. It functions as a tribology modifier of engineering plastics or a replacement for PTFE. Exhibits high mechanical properties, low friction and high processability. Improves durability due to high abrasion resistance. It can reduce a squeaking sound with a variety of materials. It contributes to increased product efficiency and total cost reduction. LUBMER™ LS4140 is suitable for processing by injection molding, co-extrusion or insert mold.
Product Type
Other Surface Modifiers
Chemical Composition
Ultra-high Molecular Weight Polyethylene (UHMWPE)
Physical Form
Light yellow
Product Status
Applications/ Recommended for
  • Gears
  • Extrusion > Coextrusion
  • Injection molding - thermoplastics
  • Mechanical/ physical performance > Sound dampening
  • Cost reduction

LUBMER™ LS4140 Properties


Value & Unit
Test Condition
Test Method
Melt Mass-Flow Rate (MFR or MFI = Melt Flow Index or MI = Melt Index)
14 g/10 min
(At 230°C. 2.16kgf)
MCI Method
1095 kg/m3
ASTM D1505
Coefficient of Friction
(Kinetic. Counter material:S45C ring. Load:0.75MPa. Velocity:30m/min. Time:100min)
MCI Method

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