Tag Archives: mask

Indian Innovators Offer Nose Filters to Counter Heavy Air Pollution | Neso filter

The Naso filter, developed by a team of young innovators at the Indian Institute of Technology, New Delhi, consists of a thin  membrane which fits inside the nose.
The idea of nasal filters is not new, and some are available in Western countries to help reduce exposure to allergens such as pollen. One study conducted in 2016 on a product made in Denmark found it reduced symptoms of allergies and was comfortable to use.

The Indian device, however, focuses on the country’s pressing problem of air pollutants. Working out of one room on the sprawling IIT campus, which has been the home of several innovations, the young team is optimistic it will find acceptance in a city where the toxic cocktail of vehicle fumes, construction dust and burning waste spikes to as much as 30 times the safe limit in winter.

Shaped roughly like a fingernail, the dark brown membrane is made by assembling millions of small-sized pores and resembles a fine, porous cloth.

The costs have been held down to ensure the filter is within the reach of most people: It is priced at approximately  Rs 10. Effective for around eight hours, the innovators claim it can filter out 95 percent of the pollutants.


Surgical non woven Mask is a single use filtration device made of fabric and worn over the nose and mouth of surgical staff to prevent contamination of the operative field and to protect the wearer from splashes and splatter.Surgical Mask offered find application in covering of faces that serves the needs of providing a protective barrier finish as demanded and required by the people.Made from non woven fabric, manufacturers can make these available in two layer as well as three layer configuration finish.Providing for optimum bacterial filtration efficiency, these are also made available with options of Elastic Straps and Tie bands so as to provide for proper fixing support.

The typical material used to manufacture surgical face masks are polypropylene with 20 gsm and 25 gsm polypropylene non-woven sheet.Surgical masks are available in different color like white, blue, green, yellow and pink.More effective surgical face masks which provides 85% or even 99% protection is required very fine filter layer.

Advantages of non-woven fabrics over woven fabric in filtration are higher air permeability, higher bacterial filtration efficiency, no yarn slippage and low manufacturing cost.Non-woven based surgical face masks are disposable.The non-woven technology guarantees better barrier properties than cotton, polyester or even more advanced woven products.There is a less risk of contamination after using of disposable non-wovens than reusable products either woven or knitted.