The wind of change through long glass fibers in fan impellers

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  • Metal replaced by long glass fiber-reinforced polyamide in axial fans
  • Material features high weld strength and creep resistance
  • High notched impact strength: material absorbs impact and shock energy

One of the leading manufacturers and developers of axial impellers, Denmark-based Multi-Wing International A/S, uses a new long glass fiber-reinforced polyamide in the production of the hubs of their new mixed flow fan. These hubs are circular parts fitted on axles or pulleys which then transfer the circular motion to the fans.

Material features high weld strength and creep resistance

Fan impellers are used in ventilation, for example in tunnel ventilation systems, engine cooling systems and air-conditioning systems. A new polyamide fiber system provides an improved fiber bonding within the plastics which results in a more stable fiber skeleton structure. The key features of the Ultramid Structure B3WG10 LFX material of BASF are its extremely good weld line strength and creep resistance, particularly at high temperatures, which make it ideal as a substitute for metal.

Metal replaced by long glass fiber-reinforced polyamide in axial fans (source: BASF)

The key features of the Ultramid Structure B3WG10 LFX are its extremely good weld line strength and creep resistance (source: BASF)

High notched impact strength: material absorbs impact and shock energy

Axial fans are subjected to high speeds and undesirable natural oscillations and vibrations. Due to its high weld line strength and creep resistance, Ultramid Structure LFX can withstand these extreme stresses and thus provides protection against damage and excessive deformation of the plastic. Its high notched impact strength also means that the material can absorb impact and shock energy at low temperatures down to -30 degrees without breaking. The plastic also has good heat resistance. It retains its mechanical properties over a wide range of temperatures and as a result exhibits very good, longlasting dimensional stability even at elevated temperatures.



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