Intermediate layer, filter:
Meltblown respirators for BFE 95 and BFE
Meltblown is obtained at the bottom and some types of resins with polypropylene, one of the most used materials. These are subjected to a thermal process to melt them and keep them in a liquid state.
They are then passed through an extrusion head and driven by a high-temperature air jet. At the exit, a jet of cold air solidifies it, forming a tangle of threads which form the blanket.
The meltblown offers properties between paper and fabric and may have a variable structure for lightweight and flexibility.To do this, certain parameters of the production process are modified, for example, the blowing pressure or the number of holes in the dies.
Its use is designed as a filter for liquids and air particles, acting as an excellent bacterial barrier avoiding contact with the skin.