Typical applications are e.g.:
Ultra-elastic yarns for the textile industry for the manufacture of elastic mixed yarns

  • Typical materials: PUR solutions (dope) or thermoplastic elastomers based on polyester and polyurethane
  • Common throughputs up to 1.500 kg/h
  • Filtration finenesses down to 10 µm

In the manufacture of spandex, ultra-fine filtration is used not only for the removal of solid inhomogeneities but also to retain or destroy gel-like contaminations. Moreover, process consistency regarding pressure and temperature is an essential prerequisite for an efficient production. High throughput rates make a fully-automatic filtration system without any influence on the process necessary. The RSFgenius and the SFXmagnus were developed especially for these requirements and make continuous cost reductions in the manufacturing process, with top product qualities, possible.

The advantages of Rotary Filtration

  • Simple and safe screen changes
    Danger to the personnel and environment during filter changes is eliminated. Thanks to the encapsulated design of the RSFgenius any influence from air during the filtration process is avoided.
  • Consistent material properties thanks to a short dwell time of the melt
    Thermal degradation of the melt is avoided, the viscosity remains constant. In this aspect, the RSFgenius and the SFXmagnus are substantially different from conventional candle or disk filters.
  • Longer spinpack lifetime
    The process-constant mode of operation of the RSFgenius and the SFXmagnus avoids any influence on the spinning process all year. Pre-filtration with < 20 µm directly upstream of the spinpack is possible, so that the spinpack can be used primarily for melt homogenization.
  • Homogenization of the spinning solution or of the melt
    The process-constant mode of operation of the RSFgenius and the SFXmagnus assures homogenization of the melt or of the spinning solution, thus constant material and product properties are made possible.
  • Reduced material costs
    The RSFgenius with its integrated self-cleaning avoids the material loss encountered during filter changes with conventional systems.
  • Maximum line availability
    Filter or screen changes without any production interruptions and disturbances as well as the fully-automatic mode of operation make a maximum line availability possible.