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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.

    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 $$ $$