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POM

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DATA SHEETS

POM MATERIAL

COLOR – WHITE POM (POLYACETAL)

POM, also known as polyoxymethylene (polyacetal), is a high-performance engineering thermoplastic valued for its unique physical and mechanical properties. With excellent strength, rigidity, and dimensional stability, POM is a preferred choice in a wide range of industrial and engineering applications where long service life and minimal deformation are required.

One of the key advantages of POM plastic is its low moisture absorption, outstanding wear resistance, and excellent chemical resistance. It maintains its properties even in humid and aggressive environments, making it ideal for demanding conditions.

POM is highly compatible with mineral oils and fire-resistant water-based hydraulic fluids (HFA, HFB, HFC), which expands its use in sealing systems, POM bushings, and precision mechanical parts. However, it is important to note that POM is not resistant to strong acids, bases, and oxidizing agents, which must be considered in specific applications.

KEY ADVANTAGES OF POM

OIL AND FUEL RESISTANCE

Excellent resistance to mineral oils, fuels, lubricants, and many aliphatic hydrocarbons ensures reliable sealing and long-term performance in hydraulic and pneumatic systems.

GOOD MECHANICAL PROPERTIES

POM exhibits high tensile strength, abrasion resistance, and dimensional stability, making it ideal for precision components, gears, bushings, and sliding elements in industrial and automotive applications.

WIDE OPERATING TEMPERATURE RANGE

Standard operating range from –30 °C to +100 °C (short-term up to +120 °C), maintaining elasticity, strength, and sealing integrity under static and dynamic loads.

CUSTOMIZABLE GRADES

Available in different formulations with enhanced wear resistance, chemical resistance, and special modifications for demanding applications in mechanical engineering and sealing technology.

LOW MOISTURE ABSORPTION

One of the key advantages of POM is its low water absorption, which guarantees long service life and stable properties even in humid or wet environments.

COST-EFFECTIVE PERFORMANCE

Combining durability, versatility, and affordable production costs, POM is one of the most widely used engineering plastics for seals, bushings, and precision parts.

Applications

POM is widely used in:
  • Seals and bushings for industrial equipment.
  • Automotive industry (fuel systems, gears, bearings, sliding elements).
  • Mechanical engineering and precision components.
  • Electrical engineering (insulating parts, housings).
  • Food processing industry (with FDA-approved grades).
Good resistance
Mineral oils
Aliphatic hydrocarbons (propane, butane)
Water
Fire-resistant pneumatic fluids HFA, HFB, HFC
Adipose and vegetable oils
Diesel petrol
Big amount of dilute acids and bases, salines at room temperature
Average resistance
40% aromat. fuils (leaded fuils)
Biodegradable hydraulic fluid
–
Silicone oil and grease (oils can cause the decrease)
–
–
–
Low resistance
Aromatic hydrocarbon (toulene, benzol)
Chlorinated hydrocarbones (trichloroethylene)
Brake fluids based on glycol
Fire-resistant pneumatic fluids HFD
Acetone, acetic acid ethyl esters
–
–
Properties
Value
Unit
Standard
Hardness at 20°:
85
Shore D
DIN 53505
Density:
1,41
g/cm³
DIN 53479
Tensile strength:
>70
N/mm2
EN ISO 527-2
Elongation at break:
>35
%
EN ISO 527-2
Modulus of elasticity:
3000
N/mm2
EN ISO 527-2
Charpy impact strength:
>140
kJ/m2
EN ISO 179
Compr. strength at 1% deform.:
100
N/mm2
ASTM D695
Coefficient of friction (dyn.):
<0.25
μ
ASTM D1894
Water absorbtion to saturation:
<0.8
%
EN ISO 62
Water absorbtion in 23h:
<0.2
%
EN ISO 62
Dieelectric strength:
20
kV/mm
EN IEC 60243
Volume resistivity:
>1014
Ω*cm
EN IEC 60093
Surface resistivity:
>1013
Ω
EN IEC 60093
Coefficient of therm. expansion:
120
1/K*106
–
Min. service temperature:
– 60
°C
–
Max. service temperature (short term):
+ 100 (+140)
°C
–
All above established data results from random tests which were taken from the functioning production. All data was stated based on standard test-products in accordance with ISO, DIN and ASTM standards and can substantially not be extended to the completed seal. Our practical technical recommendation, either oral, written or through tests is given in conformity with our best knowledge. However, this data is to be regarded as non-obligatory advice, also taking into consideration any protective rights of a third party, and does not acquit you from making tests with our product in relation to its adaptability for the assigned process and intendment. Utilization, application and processing of the products befall completely outside of our control and are therefore solely your liability. As regards the responsibility, it will be limited to all damages in the value of the product which we delivered and you applied. Certainly, we do assure the immaculate quality of our products in concordance with our general sales and delivery conditions.

TEST ALPANA QUALITY

We take pride in our seal-making raw materials and are ready to offer samples of our semi-finished products. For testing, we provide our most popular materials, including the Max series of polyurethanes: H-Pur, SH-Pur, XSH-Pur, XH-Pur—as well as rubber bushings: NBR, FKM, H-NBR, EPDM, and MVQ!
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