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Teijin develops Nanofront bag filter for air pollution
21
Oct '17
Bag filters after usage (left: conventional bag filter, right: Nanofront bag filter); Courtesy: Teijin
Bag filters after usage (left: conventional bag filter, right: Nanofront bag filter); Courtesy: Teijin
Teijin Frontier Co., Ltd., the Teijin group’s fibre-product converting firm, has unveiled a new bag-type filter using Nanofront high-strength ultra-fine polyester fibre for high-efficiency dust collection and energy savings. Teijin Frontier will sell the Nanofront bag filter to cement, steel, and powder companies, targeting sales of JPY one billion by 2020.

The bag’s inside is lined with ultra-fine Nanofront fibres, which have a diameter of just 700 nanometres, creating a finely porous structure for the extra-efficient collection of dust and powder. The Nanofront bag filter can reduce fine powder dust emissions by nearly half compared with existing fluorinated-resin membrane bags. The Nanofront bag filter is expected to satisfy Chinese regulations for powder dust emissions of less than 10mg/m3 in urban areas.

The Nanofront bag filter also improves ventilation volume by nearly 50 per cent compared with fluorinated-resin membrane bags, and the interval between cleanings to remove dust and powder is prolonged by about 40 per cent. The Nanofront bag filter is also expected to improve productivity by more than 10 per cent by and reducing the cleaning duration. Furthermore, the Nanofront bag filter is expected to last longer thanks to its thick fibre layers.

Demands to reduce powder dust emissions are increasing, especially in China. Regulations now effective in urban China have reduced such of emissions from 30mg/m3 to 10mg/m3. Fluorinated-resin membranes are used for conventional bag filters to reduce emissions by thinning the filtering area and increasing the dust-collection amount, but thinner bag filters clog and decrease ventilation volume. Also, such membranes sometimes rupture when exhaust energy is increased and they must be used in a series, which adds additional costs. Teijin Frontier’s Nanofront bag filter overcomes such problems while achieving highly efficient dust collection and ventilation volume. (GK)

Fibre2Fashion News Desk – India


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