company tower banner
AB Carlsson & Moller Company Logo
Acetal POM H is a polyoxymethylene homopolymer. It is used in various Industry.

Polymer Name: Polyacetal Copolymer (POM)

Technical Data Sheet
  • TypeDocument Name
View All Documents

Knowde Enhanced TDS

Identification & Functionality

Plastics & Elastomers Functions
Technologies

Features & Benefits

Benefits
  • Excellent combination of toughness, stiffness, fatigue strength and creep resistance (spring material).
  • Good moisture and chemical resistance.
  • Useful in a wide temperature range.
  • Resistant to thermal and oxidative degradation.
  • Good resistance to stress relaxation.
  • Good friction and wear properties.
  • Low gas and vapor permeability.
  • Tight tolerances and good dimensional stability of finished details.
  • Qualities with different fillers and additives are available to suit different purposes.

Applications & Uses

Applications
  • Impellers. 
  • Plain bearings.
  • Fine mechanical details.

Properties

Typical Properties
ValueUnitsTest Method / Conditions
Density1.43g/cm3ISO 1183-1
Water Absorption (immersed in water 24/96h at +23°C)18, 36mgISO 62
Water Absorption (immersed in water 24/96h at +23°C)0.21, 0.43%-
Water Absorption (when saturated in air +23°C / 50%RH)0.2%ISO 62
Water Absorption (when saturated in water +23°C)0.8-ISO 62
Melting temperature (DSC, +10°C/min)180.0°CISO 11357-1/-3
Thermal conductivity (23°C)0.31W / (Km)-
Length Extension Coefficient (23°C - 100°C)0.00012m / (mK)-
Temperature Dependent Deflection (1.8MPa)110.0°CISO 75-1/-2
Max. Operating Temperature in Air (Short Time)150.0°C-
Max. Operating Temperature in Air (min 5000/20000h)105/90°C-
Minimum Service Temperature-50.0°C-
Flammability (Oxygen Index)15.0%ISO 4589-1 /-2
Flammability (UL 94, 3/6 mm thickness)HB/HB--
Breaking Strength78.0MPaISO 527-1/2
Tensile Strength78.0MPaISO 527-1/2
Tensile Stress (Yield Strength)40.0MPaISO 527-1/2
Tensile Stress (Elongation at Break)50.0%ISO 527-1/2
Tensile Stress (Traction Module)3300.0%ISO 527-1/2
Compression (compression at 1/2/5% deformation)29, 49, 85MPaISO 604
Charpy Impact Test UncutNo CrimekJ/m2ISO 179-1 / 1eU
Charpy Impact Test Scored10.0kJ/m2ISO 179-1 / 1eU
Cultivation Hardening160.0N/mm2ISO 2039-1
Rockwell HardnessM88-ISO 2039-2
Electrical Impact Resistance20.0kV / mmIEC 60243-1
Volume Resistivitymin. 10E 14Ohm.cmIEC 60093
Surface Resistivitymin. 10E13OhmIEC 60093
Relative Permittivity (100Hz)3.8-IEC 60250
Relative Permittivity (1MHz)3.8-IEC 60250
Electrical Loss Factor Tan δ (100 MHz)0.003-IEC 60250
Electrical Loss Factor Tan δ (1 MHz)0.008-IEC 60250
Creep Current Index (CTI)600.0-IEC 60112

Technical Details & Test Data

Restrictions
  • Attacked by strong mineral acids (pH below 4).
  • Degraded by UV radiation in unpigmented condition.
  • Approved for contact with food.
  • Hard to glue with yourself or other materials.
  • Should not be used in electrical applications above + 70 ° C.
  • Elongation should not exceed 2-4%.
  • High combustion rate, dangerous gas is formed.
  • Sensitive to criminal instructions.
  • Homopolymer should not be used in alkaline environments (pH above 9).