POM – Polyacetal


POM LM (TECAFORM AH LM) white is a modified POM-C which contains a special additive that allows for a very high degree of contrast when marked with laser etching plastic technology. As plastic applications become increasingly critical, and the desire for improved traceability of finished plastic parts increases concurrently, plastic laser marking has likewise become more necessary and desirable than ever before. The laser markings exhibited by TECAFORM AH LM white manifest themselves as dark grey or black in color, in contrast to other more simple color modifications, which result in a less visible color shift that is more light grey or white when exposed to plastic laser input and only barely visible. This very high contrast of plastic laser marking in TECAFORM AH LM also makes possible the use of very small font sizes necessary for the smallest part surfaces. Laser markable plastic acetal ensures compliance to traceability requirements in both food and pharmaceutical industries, and also meets legal and agency requirements associated with those industries such as FDA and EU 10/2011. TECAFORM AH LM white laserable plastic acetal copolymer is available as a stock item in the form of sheets and round bars with short delivery times. An alternative color, TECAFORM AH LM grey can also be manufactured on request.

Physical properties
  Value Unit Test method
Specific gravity 1,41 g/cm3 DIN EN ISO 1183
Average molecular mass 106 g/mol
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
  Value Unit Test method
Modulus of elasticity 2700 MPa DIN EN ISO 527-2
Tensile strength 81 MPa DIN EN ISO 527-2
Elongation at break 11 % DIN EN ISO 527-2
Tensile strength at break 32 % DIN EN ISO 527-2
Flexural modulus 2400 MPa DIN EN ISO 178
Flexural strength 81 MPa DIN EN ISO 178
Compressive modulus MPa EN ISO 604
Compressive strength, 1%/2% MPa EN ISO 604
Impact strength (Charpy) 110 kJ/m2 DIN EN ISO 179-1eU
Notch impact strength (Charpy) kJ/m2 DIN EN ISO 179-1eA
Notch impact strength (Izod) kJ/m2 DIN EN ISO 180/2A
Toughness (ball pressure) 1140 MPa ISO 2039-1
Toughness (Shore D) Sh D DIN EN ISO 868
Wear-resistance % Sand-Slurry
Coefficient of friction (against steel) μ
Thermal properties
  Value Unit Test method
Glass-transition temperature -60 °C DIN 53765
Melting point 168 °C DIN 53765
Operating temperature (instantaneous) 140 °C
Operating temperature (continuous) 100 °C
Operating temperature (minimum) 100 °C
Thermal expansion coefficient, 23–60 °C 13 10-5 K-1 DIN EN ISO 11359-1;2
Thermal expansion coefficient, 23–100 °C 14 10-5 K-1 DIN EN ISO 11359-1;2
Specific heat capacity J/(g×K) ISO 22007-4:2008
Thermal conductivity W/(m×K) ISO 22007-4:2008
Electrical properties
  Value Unit Test method
Surface resistivity DIN IEC 60093
Resistivity Ω×cm DIN IEC 60093
Dielectric strength kV/mm DIN EN 60243-1
CTI value V DIN EN 60112
Optical properties
  Value Unit Test method
Light transmittance
Refractive index
Optical errors DIN 52305/AS
Abrasion-resistance, 100 rotations with 500 g % haze ANSI Z26.1

Additional downloads

Delivery selection bars, sheets
Specific gravity 1,41 g/cm3
Service temperature 100 … 100 °C
Price category €€ (€8–25/kg)

Special properties

  • low coefficient of friction
  • imperviousness to water absorption
  • food-grade product
  • excellent mechanical strength
  • excellent machinability
  • lasermerkattava


food and drinks industry, laser technology, electronics industry, health technology and equipment, mechanical engineering, pharmaceutical industry

Standard colours


Special colours

upon special request

Premade pieces


Commonly known brands