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Omnia Plastica Akulon® POM h Acetal Homopolymer
Categories: Polymer; Thermoplastic; Acetal (Polyoxymethylene, POM); Acetal Homopolymer, Unreinforced

Material Notes: The general features of homopolymer acetalic resin are similar to those of copolymer POM c, except that service temperature (under load) is slightly higher but resistance to hydrolysis and strong alkali is lower.

Features:

  • High fatigue resistance.
  • Good dimensional stability.
  • Low friction coefficient High compressive strength.
  • The shock resistance is good even at low temperature.
  • Excellent machinability, especially on automatic equipment
  • Colour: natural
Weak Point:

Compared to PA6 it has lower abrasion resistance, particularly in dirty and dusty environments. Compared to POM c. its resistance to hydrolysis is lower.

Application:

  • Mechanical: it is used for mechanical applications such as bearings, cams, gears with low torque, gear wheels, conveyor rollers and dimensionally stable precision parts.
  • Food contact: being physiologically inert, it is suitable for food contact. It can be used in water at 80° C.
  • Electrical: as it is not hygroscopic, it is commonly used for electric components such as insulators.
  • Chemical: it is resistant to alkali and organic compounds. Thanks to its good chemical properties it is suitable for pump components, flanges and components for chemical plants.

Information provided by Omnia Plastica s.p.a. for semifinished products such as sheet, rod, and tube.

Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 1.42 g/cc0.0513 lb/in³ISO.1183 DIN.53479
Moisture Absorption at Equilibrium 0.20 %0.20 %50% relative humidity
Water Absorption at Saturation 0.70 %0.70 %23°C
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell M 9292dry sample; ISO2039.2
Ball Indentation Hardness 150 MPa21800 psiISO2039.1 DIN.53456
Tensile Strength at Break 69.0 MPa10000 psiISO.527 DIN.53455
Elongation at Break 50 %50 %ISO.527 DIN.53455
Tensile Modulus 2.90 GPa421 ksiISO.527 DIN.53455
Compressive Strength 14.0 MPa2030 psi1% strain over 1000 hours; ISO.899 DIN.53444
Charpy Impact Unnotched NBNB7.5 J; ISO.R179 DIN.53453
Charpy Impact, Notched 1.10 J/cm²5.24 ft-lb/in²ISO179/3C DIN.53453
Coefficient of Friction, Dynamic 0.300.30on dry ground steel; load =0.05MPa; speed =0.6 m/s
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity 1.00e+15 ohm-cm1.00e+15 ohm-cmISO.93 DIN.53482
Dielectric Constant 3.7
@Frequency 1e+6 Hz
3.7
@Frequency 1e+6 Hz
ISO.250 DIN.53483
Dielectric Strength 32.0 kV/mm813 kV/inISO.243 DIN.53481
Dissipation Factor 0.010
@Frequency 1e+6 Hz
0.010
@Frequency 1e+6 Hz
ISO.250 DIN.53483
 
Thermal PropertiesMetricEnglishComments
CTE, linear 110 µm/m-°C
@Temperature 23.0 - 60.0 °C
61.1 µin/in-°F
@Temperature 73.4 - 140 °F
Thermal Conductivity 0.300 W/m-K2.08 BTU-in/hr-ft²-°FDIN.52612
Melting Point 175 °C347 °F
Maximum Service Temperature, Air 100 °C212 °FContinuous; 5000 hours based on a tensile stress of 50% at 23° C.
 145 °C293 °Fshort period, no load
Deflection Temperature at 1.8 MPa (264 psi) 135 °C275 °FISO.75 DIN.53461
Minimum Service Temperature, Air -50.0 °C-58.0 °Fimpact conditions and heavy loads not considered
Flammability, UL94 HBHB
Oxygen Index 15 %15 %ISO.4589

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