Rulon® J, is a member of the filled PTFE (polytetrafluoroethylene) family. This unique family of polymers has the ability to withstand nearly all chemicals, has low friction and is resistant to heat. Rulon® J is an all-polymeric reinforced, dull gold colored PTFE compound that operates very well against soft mating surfaces such as 316 stainless steel, aluminum, mild steel, brass and plastics. The uniquie “shaft friendly” material is also low in friction and wear and is self lubricating.

Rulon® J has one of the lowest coefficients of friction of most reinforced PTFE materials. This makes it ideally suited for start/stop applications where stick-slip must be eliminated. The tribological (wear) properties of this material also make it suitable for both bearing and wear component applications where lubrication is not desirable or impossible.

Specification Test Value Units
Specific Gravity, 73°F D792  2.65 -
Tensile Strength @ Yield, 73°F D638  2,000 psi
Tensile Modulus of Elasticity, 73°F D638   psi
Tensile Elongation (at break), 73°F D638  180 %
Flexural Strength, 73°F D790   psi
Flexural Modulus of Elasticity D790   psi
Shear Strength, 73°F D732   psi
Compressive Strength - Ultimate    750 psi
Compressive Strength at 2% Deformation D695  750 psi
Compressive Strength at 10% Deformation D695   psi
Deformation Under Load     %
Compressive Modulus of Elasticity, 73°F D695    
Compressive Strength ⊥ to Laminate (Modulus)     psi
Compressive Strength ⊥ to Laminate (Yield)     psi
Compressive Strength ⊥ to Laminate (Ultimate)     psi
Hardness, Durometer (Shore "D" scale) D2240  60  
Hardness, Rockwell (Scale as noted) D785   Rockwell M
Izod Impact, Notched @ 73°F D256 Type A     - ft.lbs/in. of notch
Coefficient of Friction (Dry vs Steel) Static PTM55007  2.0  
Coefficient of Friction (Dry vs Steel) Dynamic PTM55007  1.2  
Maximum Static Bearing Load (P) PTM55007  750 psi
Maximum Unlubricated No Load Bearing Velocity (V) PTM55007  400 ft/minute
Maximum Limiting PV (Unlubricated) PTM55007  10,000 psi x ft/min.
Wear Factor "K" x 10-10 PTM55010   Cubic in.-min/
Sand Wheel Wear/Abrasion Test     UHMW=100
Minimum Mating Surface Hardness    RB25 Rockwell (Brinnell)
Coefficient of Linear Thermal Expansion E-831(TMA)   in/in/°F x 10-5
Coefficient of Thermal Expansion (Bearing Diameter) E-831(TMA)   4.90 in/in/°F x 10-5
Coefficient of Thermal Expansion (Bearing Length) E-831(TMA)  6.50 in/in/°F x 10-5
Softening Point     °F
Heat Deflection Temperature 264 psi D648   °F
Embrittlement Temperature    -400 °F Min.
Continuous Service Temperature in Air    550 °F Max.
Short Term Service Temperature    550 °F Max.
Tg-Glass Transition (Amorphous) D3418   °F
Melting Point (Crystalline) Peak D3418   °F
Thermal Conductivity F433  2.0 BTU-in/(hr/ft2°F)
Dielectric Strength Short Term D149   Volts/mil
Volume Resistivity D257  8x1018 ohm/cm
Surface Resistivity D257  6x1018 ohm/cm
Dielectric Constant, 106 Hz D150  2.4  
Dissipation Factor, 106 Hz D150  0.001  
Flammability @ 3.1mm(1/8 in.) UL94 UL94  V-0  
Arc Resistance     seconds
Water Absorption, Immersion 24 Hours D570 (2) Nil %
Water Absorption, Immersion Saturation D570 (2)  Nil %
Machinability Rating    3 1=easy, 10=difficult
Rod Diameter Availability (Off the Shelf)    .250-2.50 inches
Sheet Thickness Availability (Off the Shelf)    .125-1.00 inches