Efficiency of Electret Polycarbonate Nonwovens in Respiratory Protection Against Nanoparticles

Efficiency of filtering materials used in respiratory protective devices against nanoparticles.

The basic aim of this research was to establish the efficiency of filtering materials widely used in respiratory protection devices with particular interest in their porosity, degree of electric and changeable process parameters, such as the flow rate of the test nanoaerosol and the size range of nanoparticles. Tests were carried out with an NaCl solid aerosol of 3.2 × 105 particles/cm3 for the...

Respiratory Protection for Nanoparticles

A. Nanoparticles are very small (nearly atomic scale) with diameters less than 100 nm (<0.1 micron) in at least one dimension. Because of their small size, air sampling results indicating low mass concentrations actually contain greater numbers and larger surface area/unit mass of nanoparticles than for the same mass concentration of larger particles. Also, nanoparticles may be more biologicall...

Respiratory protection against influenza.

Level of respiratory protection against influenza virus

Sir, the recent report on influenza is very interesting [1]. Heuer et al. reported that “The three tested filters retained the virus input, indicating that their use in the breathing systems of intubated and mechanically ventilated patients can reduce the risk of spreading the virus to the breathing system and the ambient air." [1] In fact, the management of the intubation in the era of influen...

New filtering antimicrobial nonwovens with various carriers for biocides as respiratory protective materials against bioaerosol.

This study evaluated the bioactivity of polypropylene melt-blown filtering nonwovens used in respiratory protective devices (RPD) with a biocidal agent (alkylammonium microbiocides) on 2 mineral carriers. Two types of carriers were tested: a bentonite, with an aluminosilicate base, and a perlite, volcanic glass. High biostatic and biocidal effects of modified nonwovens with biocides were tested...