high strength properties: 70–80 MPa (yieldstress, tensile strength)
high toughness (notched Charpy): 8 kJ/m2 – does not break,
good sliding properties : m = 0,25–0,45 (dry sliding on smoothed and ground steel),
wide temperature range for application: from: –50°C to +120°C,
high hardness (Rockwell): M 86 – M 90,
good fatigue strength and damping capability,
does not expand in the presence of moisture, the POM C version can even be used under water up to 80°C,
can be readily cut using automatic machines, as well
density: 1,4 kg/dm3
Cutting (turning, milling, drilling, reaming, sawing): these plastics have the best cutting properties. Traditional metalworking – or in certain cases, woodworking tools – carbon steel, rapid steel, hard metal, diamond can be used in sharp design. Cooling is recommended, which allows high cutting rates e. g. v = 200–500 m/min for turning, v = 200–400 m/min for milling, v = 50–100 m/min for drilling.
Adhesive bonding and welding: feasible but not suggested.
DOCACETAL (POM - Polyoxymethylene) Products
The extruded, unfilled copolymer version among polyoxymethylenes. This type of POM has a better resistance to heat ageing than POM-H, and it is resistant to hydrolysis and strong bases, as well. Available colors in limited dimension: blue, yellow, green, red.
DOCACETAL C ELS
Due to the conducting filler material in the basic POM C matrix structure, this product can conduct electrical charges. In comparison with “natural” POM C, the volume and surface resistance of the product is smaller by four – five degrees of magnitude.
DOCACETAL C Esd
Due to the conducting filler material in the basic POM C matrix structure, this product can conduct electrical charges. In comparison with "natural" POM C, the surface and volume resistance of the product is smaller by three – four degrees of magnitude.
DOCACETAL C GF25
Due to the glass fiber filling, the mechanical characteristics of POM C are different. The product is more rigid and has better dimensional stability than the “natural” version.
DOCACETAL C ID
Inductively detectable. POM C base matrix with detectable filler. Good toughness and strength. Good resistance to cleaning agents.
DOCACETAL C MT
Special POM C used for medical technology. Very good sliding and abrasion behaviour. Resistant to organic solvents. Resistant to common sterilization methods and cleaning agents.
DOCACETAL C PE
PE additives ensure excellent sliding properties and improved abrasion resistance.
This homopolymer version has greater mechanical strength, rigidity, smaller thermal expansion and better wear resistance than POM-C, but is not as readily usable in watery, warm medium.
DOCACETAL H TF
PTFE-filled POM-H. Due to the filling material, its characteristics are different from those of the POM-C and POM-H base materials. Due to the PTFE content, it is softer and not as rigid. Conversely, its sliding and wear properties are excellent. Even in the event of large loads and small speeds, sliding without “stick-slip” can be achieved.