Production of Filter Systems

Respirable fine dust emissions are subject of environmental discussions since they bear great risks of disease. The project NaBlo aims to reduce the exposure to fine dust particles by new filter systems based on nano fiber meltblown media. 

Meltblown Production Process based on Polypropyene

Our efforts are focussed on developping a significantly more efficient meltblown production process than current state of the art technologies. Moreover, nonwoven filter media with improved mechanical filter performance are to be developed which make use of nano fibers in the range of 100 - 200 nm.

Representation of Nano Fiber

In conventional filtration applications the meltblown technology is predominantly used. Extending the meltblown technology to nano fiber media in a cost-efficient way consitutes a major breakthrough in nano particle filtration. An in-depth analysis of the meltblown process and the manufactured filter media is performed to achieve the aforementioned goals. Empirical approaches will be overcome by the use of:

  • a structural analysis of the meltblown process
  • and the generated filter media by means of mathematical modeling,
  • numerical simulation
  • and the latest monitoring and  measurement procedures

Participation of the Fraunhofer ITWM in NaBlo

The analysis gives a deep insight into the meltblown process and the filtration mechanisms on the microscale of the filter media. Hence, the door is open for systematic optimization.

We are involved in the following work packages:

  • Spinning
  • Fleece Generation
  • Filter media

Project Partners:

  • Freudenberg Filtration Technologies KG, Weinheim
  • Institute of Textile Technology and Process Engineering Denkendorf (ITV)
  • Oerlikon Neumag