US’ Avient has unveiled new additives for high-efficiency particulate air (HEPA) filters that offer consistent filtration performance to meet the requirements of the HEPA H13 standard. HEPA filters remove dust, pollen, mould, and bacteria from the air. HEPA layers use electrets, which create ‘charge traps’ that helps to improve filtration efficiency.

HEPA uses a specific masterbatch that enable proper charging. Together with the fibre denier, gram weight, and number of layers, this masterbatch ensures the middle layer of the filter can effectively trap smaller particles. MagIQ Nonwoven Electret additives for HEPA filters improve the capacity for absorbing small particles. The additives allow the filter to hold its electret charge longer, helping to prolong its shelf life and ensuring that particles as small as 0.3 microns are trapped. They also offer good dispersion in hydro-charged, melt-blown nonwovens at a low dosage, Avient said in a press release.

MagIQ nonwoven electret additives for HEPA filters are suitable for applications in the building and construction, automotive, and appliance sectors. They are available globally, and are supplied from Asia and Europe. 

“At a time when we are all conscious about air quality and purity to protect our health, there is a growing demand for filters with superior performance. These new additions improve the performance of HEPA filters, helping them to achieve a consistent filtration rate of around 99.97 per cent. This is an example of our continuous focus on innovation to help support human health and safety,” Say-Eng Lee, vice president and general manager of colour and additives Asia at Avient said in a statement.