Description of process

The plastic melt is spun out through a nozzle, which consists of a row of several hundred pin holes. Hot air flows out on both sides of the nozzle tip transforming the polymer streams into very fine filaments. These filaments are drawn by high speed hot air onto a filter belt. The result is a meltblown fleece with particularly good barrier and filtration properties.

 

Applications

  • Surgical masks
  • Respiratory protection & filtration
  • Hygiene materials & wipes

Technical performance and physical properties

  • Raw materials: PP-MB
  • Grammage: 20 – 25 [g/m2]
  • LD: 200 – 400 [l/m2/s]
  • Porosity: 12 – 40 μm
  • Self-bonding / thermobonded
  • Large area / weight ratio
  • Adjustable structure of pores and capillaries
  • Hydrophobic / oleophilic (PP meltblown)
  • High filtration efficiency
  • Electrostatically charged
  • Optional additives