Track-etching technique in membrane technology

Track-etching technology is based on the beaming of polymer materials with energetic heavy ions leading to the formation of linear damaged tracks across the irradiated polymeric layer or film.
These tracks are then revealed into pores using a well-chosen wet chemical etching. The combination of the process of tracks with their subsequent etching is called track-etching.

track etching technique in membrane technology

Using products produced by track-etching, but why?

Membranes obtained using track-etching are unique among their peers based on other technologies for two main reasons :

  • the number of tracks per square centimeter (= pore density) is precisely defined by the ion beam intensity and by the rewinding speed of the polymer film;
  • a precise and controlled pore size and shape is obtained by varying etching conditions: time, temperature and strength of solutions.

State of art

State-of-the-art track-etching technology can be applied to polyimide (it4ip exclusivity), polyester and polycarbonate. Learn more about the specific features of our membranes.