
POM – Polyacetal
POM-H
POM-H homopolymer has higher mechanical strength, rigidity, hardness and creep-resistance values than POM-C does, along with a lower thermal expansion coefficient. We deliver POM-H as plastic sheets, rods and as hollow rods.
- Physical properties
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Value Unit Test method Specific gravity 1.43 g/cm3 DIN EN ISO 1183 Average molecular mass N/A Water absorption, 24/96 h (23 °C) 0.05/0.1 % DIN EN ISO 62 Weather-resistance moderate Combustibility HB UL 94 DIN EN ISO 527-2 Food safety yes - Mechanical properties
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Value Unit Test method Modulus of elasticity 3600 MPa DIN EN ISO 527-2 Tensile strength 80 MPa DIN EN ISO 527-2 Elongation at break 32 % DIN EN ISO 527-2 Tensile strength at break 43 % DIN EN ISO 527-2 Flexural modulus 3600 MPa DIN EN ISO 178 Flexural strength 106 MPa DIN EN ISO 178 Compressive modulus 2800 MPa EN ISO 604 Compressive strength, 1%/2% 22/38 MPa EN ISO 604 Impact strength (Charpy) does not break kJ/m2 DIN EN ISO 179-1eU Notch impact strength (Charpy) 14 kJ/m2 DIN EN ISO 179-1eA Notch impact strength (Izod) – kJ/m2 DIN EN ISO 180/2A Toughness (ball pressure) 185 MPa ISO 2039-1 Toughness (Shore D) N/A Wear-resistance N/A Coefficient of friction (against steel) N/A - Thermal properties
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Value Unit Test method Glass-transition temperature -60 °C DIN 53765 Melting point 182 °C DIN 53765 Operating temperature (instantaneous) +150 °C Operating temperature (continuous) 110 °C Operating temperature (minimum) N/A Thermal expansion coefficient, 23–60 °C 11 10-5 K-1 DIN EN ISO 11359-1;2 Thermal expansion coefficient, 23–100 °C 11 10-5 K-1 DIN EN ISO 11359-1;2 Specific heat capacity 1.3 J/(g×K) ISO 22007-4:2008 Thermal conductivity 0.43 W/(m×K) ISO 22007-4:2008 - Electrical properties
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Value Unit Test method Surface resistivity 1014 Ω DIN IEC 60093 Resistivity 1014 Ω×cm DIN IEC 60093 Dielectric strength 38 kV/mm DIN EN 60243-1 CTI value 600 V DIN EN 60112 - Optical properties
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Value Unit Test method Light transmittance N/A Refractive index N/A Optical errors N/A Abrasion-resistance, 100 rotations with 500 g N/A
Additional downloads
Delivery selection | plastic sheets, plastic rods, hollow bars |
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Specific gravity | 1.43 g/cm3 |
Service temperature | N/A … 110 °C |
Price category | €€ (€8–25/kg) |
Special properties
- greater density, hardness, and durability than POM-C
- less thermal expansion than POM-C
- better impact- and wear-resistance than POM-C
Applications
pharmaceutical industry, slide applications, clutch elements, thin-walled bushings
Standard colours
white, black
Premade pieces
Commonly known brands
Ertacetal® H, SUSTARIN® H, TECAFORM® AD, ZELLAMID® 900 H