electrically active POM-C with carbon black filler​, ESD

Acetal copolymer (POM-C) material modified by the addition of a special conductive carbon black is manufactured by Ensinger under the tradename TECAFORM AH ELS black. The addition of carbon black creates consistent electrical conductivity with a surface resistivity between 102 – 104 Ω/sq. Carbon black filled POM-C offers good chemical resistance, high strength and hardness, and a long-term temperature resistance up to 100 °C. In addition, carbon black filled POM-C has good UV and weather resistance. Having exceptional wear properties as well, makes this special acetal copolymer an ideal choice also for sliding applications.

TECAFORM AH ELS black is included in Ensinger's semiconductor grade portfolio, that is produced with stringent contamination controls, and offering copy-exact compliance. Therefore, Ensinger ensures the highest level of quality performance consistency of this unique property profile. Conductive POM-C material is the perfect choice for semiconductor and electronics manufacturing equipment parts, requiring mechanical stability under moderate temperatures, while protecting electronic devices from damaging electrostatic discharges (ESD).

For applications requiring a slower rate of decay of static charge in a controlled manner, Ensinger offers TECAFORM AH SD natural with a surface resistivity in the anti-static range between 10– 1011 Ω/sq. For applications requiring temperature resistance above 100 °C, Ensinger offers a conductive PEEK grade under the tradename TECAPEEK ELS nano black, with temperature resistance up to 260 °C.

As with all Ensinger semiconductor grade materials, we can confirm that TECAFORM AH ELS black meets the limitations imposed by RoHS Directive 2011/65/EU Restriction of Hazardous Substances in electrical equipment, and can also provide further conformity declarations on request.


Chemical designation
POM-C (Polyacetal (Copolymer))
1.41 g/cm3

Main Features

  • electrically conductive
  • high strength
  • good machinability
  • difficult to bond
  • good chemical resistance
  • high toughness
  • good wear properties
  • good UV and weather resistance

Target industries

Technical details

  • product-technical-detail-collapse-item-0-lvl-1
    Mechanical properties Value Unit Parameter Norm
    Modulus of elasticity
    (tensile test)
    1800 MPa 1mm/min DIN EN ISO 527-2
    Tensile strength 42 MPa 50mm/min DIN EN ISO 527-2
    Tensile strength at yield 42 MPa 50mm/min DIN EN ISO 527-2
    Elongation at yield (tensile test) 11 % 50mm/min DIN EN ISO 527-2
    Elongation at break (tensile test) 11 % 50mm/min DIN EN ISO 527-2
    Flexural strength 56 MPa 2mm/min, 10 N DIN EN ISO 178
    Modulus of elasticity
    (flexural test)
    1500 MPa 2mm/min, 10 N DIN EN ISO 178
    Compression modulus 1500 MPa 5mm/min, 10 N EN ISO 604
    Compression strength 16/25/45 MPa 1% / 2% / 5% EN ISO 604
    Impact strength (Charpy) 74 kJ/m2 max. 7,5J DIN EN ISO 179-1eU
    Shore hardness 79 D DIN EN ISO 868
  • product-technical-detail-collapse-item-1-lvl-1
    Thermal properties Value Unit Parameter Norm
    Glass transition temperature -60 C DIN EN ISO 11357
    Melting temperature 169 C DIN EN ISO 11357
    Thermal conductivity 0.46 W/(k*m) ISO 22007-4:2008
    Specific heat 1.3 J/(g*K) ISO 22007-4:2008
    Service temperature 140 C short term NN
    Service temperature 100 C long term NN
    Thermal expansion (CLTE) 13 10-5*1/K 23-60°C, long. DIN EN ISO 11359-1;2
    Thermal expansion (CLTE) 14 10-5*1/K 23-100°C, long. DIN EN ISO 11359-1;2
  • product-technical-detail-collapse-item-2-lvl-1
    Electrical properties Value Unit Parameter Norm
    surface resistivity 102 - 104 Conductive rubber, 23°C, 12% r.h. DIN EN 61340-2-3
    volume resistivity 103 - 105 Ω*cm Conductive rubber, 23°C, 12% r.h. DIN EN 61340-2-3
  • product-technical-detail-collapse-item-3-lvl-1
    Other properties Value Unit Parameter Norm
    Resistance to hot water/ bases (+) - -
    Flammability (UL94) HB - corresponding to DIN IEC 60695-11-10;
    Resistance to weathering (+) - NN
    Water absorption 0.05 - 0.2 % 24h / 96h (23°C) DIN EN ISO 62
  • product-technical-detail-collapse-item-4-lvl-1
    Relative costs Value Unit Parameter Norm
    Relative costs EU from € to €€€€€€ €€

Stock program