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Engineering 185°F - 300°F | Acetal

TECAFORM® AH SD - static dissipative

In recent years, industry has demanded a range of materials that not only possess strength, wear properties, heat and chemical resistance but materials that are less resistive to the build-up of a static charge. Ensinger has a family of such materials; their properties are listed on the reverse side of this sheet and described below.

  • TECAFORM™ SD
    Ensinger's static dissipative acetal contains no carbon fibers or powders and is generally accepted for clean room use. With its surface resistivity of 109 to 1011 ohm/square and its excellent bearing and wear characteristics, TECAFORM™ SD is ideal for moving components which may experience frictional or fluid-flow static charges.

DELRIN®s overall combination of physical, tribological and environmental properties make it ideal for many industrial wear and mechanical applications. Parts exposed to a mist or wet environment, such as pump and valve components, are especially appropriate. Other common uses for DELRIN® include gears, bearings, bushings, rollers, fittings and electrical insulator parts.

  Properties Condition Units Value
Physical Chemical Designation POM
Filler anti-stat agent
Density g/cm3 1.33
Mechanical Tensile Modulus @ 73 °F PSI 189,000
Tensile Strength @ Yld @ 73 °F PSI 5,000
Tensile Strength @ Brk @ 73 °F PSI
Shear Strength @ 73 °F PSI
Elongation @ Yld @ 73 °F % 23
Elongation @ Brk @ 73 °F % 20
Flexural Modulus @ 73 °F PSI 210,000
Flexural Strength @ 73 °F PSI 7,000
Compressive Modulus @ 73 °F PSI 150,000
Compressive Strength @ 73 °F, 10% strain PSI 6700
Izod (charpy) Impact Strength @ 73 °F ft-lbs/in 1.6
Rockwell Hardness @ 73 °F M (R) Scale
Coefficient of Friction Static 0.11
Coefficient of Friction Dynamic, 40 PSI, 50 FPM 0.18
Wear (K) Factor in3-min/ft-lbs-hr
Limiting PV psi-fpm
Thermal Vicat Softening Point °F
Melting Temperature °F 329
Heat Deflection Temperature @ 66 °F
Heat Deflection Temperature @ 264 °F 190
Service Temperature Intermittent °F 284
Service Temperature Long Term °F 212
Thermal Expansion (CLTE) in/in/°F 1.6*10-5
Specific Heat BTU/lb-°F
Thermal Conductivity BTU-in/hr-ft2-°F
Electrical Surface Resistivity ohms/square 109-1011
Volume Resistivity ohm-cm 1.0*109
Dielectric Strength V/mil 500
Dielectric Contant @ 60 HZ, 73 °F, 50% RH
Dissipation Factor @ 60 Hz, 73 °F
Other Moisture Absorption @ 24 hrs, 73 °F % 1.4
Moisture absorption @ Saturation, 73 °F % .
Flammability UL 94 HB
Food Grade N
Relative Cost $$ $$