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Delrin AF PTFE Filled Homopolymer

PTFE Filled Acetal is manufactured from Delrin® homopolymer resin which has been uniformly filled with a dispersion of 13% PTFE fiber filled homopolymer acetal. The benefits of PTFE Filled Acetal are improved wear characteristics along with strength, toughness, dimensional stability and machinability.

PTFE Filled Acetal is a unique thermoplastic material for use in moving parts in which low friction and long wear life are important. It retains 90% of the mechanical strength of unfilled acetal homopolymer, while offering very low friction and almost no "slip-stick" behavior.

Brand Names

  • Delrin® AF 
  • Unital® LF13
  • Ensital® HPV 13 
  • Delrin® AF-DE588

Emco Industrial Plastics doesn’t claim to represent all of the manufacturers or trade name products listed. This list is intended as a guide of typical materials available for purchase from Emco Industrial Plastics, Inc. For additional information, contact an Emco Industrial Plastics representative at 973-434-7432.

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At a Glance

Generic Name
Polyoxymethylene, Unfilled

Available In
Sheet, Rod, Tube, Film

ITAR Registered

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Technical Information

Stock Products Properties Applications Advantages Grades Downloads

Stock Products

Sheet 3/8″ – 2″ TH 12″ x 48″, 24″ x 48″, 48″ x 96″ Natural, Black
Rod 1/4″ – 6″ DIA 96″, 120″ Natural, Black
Tube Custom Custom Natural, Black
Film Custom Custom Natural, Black

Give us your cut-to-size dimensions. We will precision-cut these plastics to your exact size. Additional sizes and colors available upon request.


Physical PropertiesUnitsASTMResults
Density g/cc D792 1.41
Water Absorption. 24 hrs % D570 0.25
Mechanical PropertiesUnitsASTMResults
Tensile Strength @yield psi D638 11
Tensile Modulus psi D638 450
Tensile Elongation @Break % D638 30
Flexural Strength psi D790 13
Flexural Modulus psi 400000 450
Compressive Strength psi D695 16
Compressive Modulus psi D695 450
Hardness. Rockwell R D785 M89/R122
IZOD Impact Strength Notched ft-lb/in D256 1
Thermal PropertiesUnitsASTMResults
Coefficient of Linear Thermal Expansion Expansion (x 10-5 in./in./°F) D256 4.7
Heat Deflection Temp at 264 psi °F 250
Melting Temperature °F D3418 347
Max Operating Temp °F 180
Thermal Conductivity BTU-in/ft2-hr-°F C177 2.5
Flammability Rating UL94 HB


Electrical PropertiesUnitsASTMResults
Dielectric Strength V/mil D149 450
Dielectric Constant D150 3.7
Dissipation Factor D150 0.005
Volume Resistivity. 50% RH ohm-cm D257 10^15

NOTE: The property values presented above are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers’ complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.


  • Pump and valve parts
  • Bushings
  • Bearings
  • Gears
  • Wear pads
  • Electrical components


  • High strength and stiffness
  • Low friction
  • Easy to machine
  • Good dimensional stability
  • Low moisture absorption
  • Resists abrasive wear in both wet and dry environments
  • Good chemical resistance
  • Excellent electrical properties
  • FDA compliant


  • Acetal Copolymer. unfilled
  • Acetal Homopolymer. unfilled – Delrin®
  • Acetal Homopolymer. PTFE filled – Delrin®
  • Glass Reinforced
  • Static Control
  • Electrostatic

NOTE: Several grades of this material are available. For additional information regarding this plastic, contact your Emco Industrial Plastics representative or call 973-434-7432.


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