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KEBAFORM C904 UR is a normal viscosity, elastomer-containing injection molding grade based on KEBAFORM C 90.0. The increased elastomer content results in a very high toughness level. The absorption capacity for high dynamic loads is excellent. Fields of application include outsert technology, track rollers, belt buckles, transport chains, fastening elements, etc.



Under the trade name KEBAFORM, we market a wide product range of POM copolymers. KEBAFORM products are characterized by high strength and surface hardness, excellent chemical resistance and outstanding sliding and wear behavior. The product range includes basic grades with different viscosities, sliding and wear-optimized grades, variants reinforced with glass and carbon fibers, and various other modified compounds.

Typical areas of application

  • Gears
  • Fasteners
  • Spring elements
  • Handles
  • Belt buckles
  • industrial goods
  • Bearing bushes
  • Outsert technology
  • Pneumatic tubes
  • Rollers
  • Sports & Leisure Articles
  • shockproof housing
  • Transport chains
  • Valves
  • Connecting elements

Industry sectors


  • dimensionally stable
  • good chemical resistance
  • good gliding properties
  • good recovery behavior
  • impact resistant
  • semi-crystalline

Overview of product features

Mechanical properties

E-modulus in MPa
ISO 527-1
Yield stress in MPa
ISO 527-1
Elongation at break in %
ISO 527-1
Impact strength (Charpy) at 23°C in kJ/m²
ISO 179-1eU
Notched impact strength (Charpy) at 23°C in kJ/m²
ISO 179-1eA

Physical properties

Density in kg/m³
ISO 1183

Rheological properties

Melt flow rate MFR (test condition)
190°C / 2,16kg
Melt flow rate MFR
ISO 1133
Shrinkage in flow direction
ISO 294-4
Shrinkage transverse to the flow direction
ISO 294-4

Thermal properties

Melting temperature (DSC, 10°C/min) in °C
ISO 11357-1/-3
Heat deflection temperature HDT (1.80 MPa) in °C
ISO 75-1/-2
Fire behavior (0.8 mm wall thickness)
IEC 60695-11-10
Fire behavior (1.6 mm wall thickness)
IEC 60695-11-10


(May be required to remove surface moisture:)
Dryer type: Dry air dryer
Temperature: 80 – 100°C
Drying time: 2 – 4 h


Mass temperature: 180 – 210°C
Mold temperature: 60 – 120°C (general guideline for technical parts: min. 90°C)
Back pressure (spec.): 10 – 40 bar
Injection speed: medium
Injection pressure: 600 – 1200 bar (depending on part and gate geometry)
Holding pressure: 600 – 1200 bar (depending on part and gate geometry)

General processing instructions:

The residence time of the melt in the screw antechamber should be kept as short as possible. In case of longer downtimes, an empty spraying of barrel and hot runner is necessary.

Legal notice

The information in this data sheet is based on our current knowledge and experience. Due to the wide range of possible influences during processing and application of our products, they do not exempt the processor from carrying out his own tests and trials. A legally binding assurance of certain properties or suitability for a specific application cannot be derived from our information.

* FE products are development products which are still in the trial phase. Technical data may still change in the course of product and process development. No final decision has yet been made on the commercialization of FE products. We reserve the right to discontinue the manufacture of FE products without giving further reasons.


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