Self-Lubricating Wear-Resistant PEEK PTFE Engineering Plastic

PEEK compounded with 20% PTFE from ZHEJIANG LISU is a self-lubricating, wear-resistant grade of PEEK engineering plastic. It sacrifices some mechanical strength in exchange for an extremely low coefficient of friction and excellent dry-friction wear resistance. It can be injection molded, extruded, and machined.

I.Core Characteristics

Advantages
Outstanding friction and wear performance
Coefficient of friction of 0.12–0.15, far lower than virgin PEEK (approx. 0.4); wear rate only about 25% of virgin PEEK; limiting PV value approximately twice that of virgin PEEK, suitable for oil-free dry running and boundary lubrication conditions. Can form a PTFE transfer film on the mating surface, resulting in low operating noise.
Heat resistance
Melting point of 343°C, continuous service temperature of approximately 240°C, heat deflection temperature of 150°C — retaining the heat resistance advantages of the PEEK base resin.

Chemical resistance
Resistant to most organic solvents, oils, acids, and alkalis; resistant to hydrolysis and high-pressure steam. Excellent electrical insulation properties, low extractables and outgassing; some grades meet FDA food-contact requirements.

Machinable, dimensionally stable
Suitable for precision turning and milling. Compared with pure PTFE, offers significantly improved creep resistance and cold-flow resistance.

Limitations (compared with virgin PEEK)
Reduced tensile, flexural, and impact strength; lower rigidity, not suitable for high-load structural components.
PTFE dispersion is process-sensitive — uneven dispersion can create localized weak points; not suitable for extremely high PV limit conditions.
Wear performance depends on the mating surface — a rough counterface will accelerate wear.

Typical key parameters: Density 1.44 g/cm³; tensile strength ≈95 MPa; Charpy notched impact strength 8 kJ/m².

II. Typical Applications

1) General Industry — Oil-Free Sliding Friction Parts
Bushings, sleeves, sliding bearings, wear pads, guide blocks, piston rings, valve seats; used for moving parts where lubricating oil cannot be applied, replacing copper, bronze, and oil-impregnated bearings.

2) Food Packaging Equipment
Conveyor wear strips, filling piston seals, moving components for baking equipment; FDA-compliant with no risk of oil/grease contamination.

3) Oil & Gas, Hydraulics
Downhole centralizers, back-up rings, high-pressure valve seats, hydraulic seals; resistant to media, high temperature, and high-pressure corrosive environments.

4) Semiconductor & Instrumentation
Wafer handling components, test fixtures, analyzer rotors, centrifuge parts; low outgassing, no metal ion leaching, electrically insulating, low friction — suitable for vacuum environments.

5) Aerospace
Actuator bushings, fuel system valve seats, cable guides — enabling lightweight replacement of metal components.

6) Medical Devices
Bushings for surgical power tools, moving parts in diagnostic instruments; can withstand high-temperature steam sterilization with no lubricant contamination risk.

III. Selection Summary

Recommended for: Sliding friction components requiring dry/minimal lubrication, low friction and low noise, chemical resistance, and medium load/medium temperature conditions.

Avoid for: Ultra-high-load bearing structural components; parts requiring extremely high rigidity.