Development of Nonwovens for Air Filtration

Abstract

Human beings have tendency to reduce every effort they do to perform any work. In search of that they did mechanisation of activity they perform by hand or use of animal effort. Mechanisation of activity uses machines which consumes fuel in the form of solid, liquid and gas and liberates pollutant in atmosphere leading to pollution. Pollutant liberated in air needs to clean or need to restricted so that quality of air is maintained for its reusability. This need has invented filters and industry started using filters to avoids themselves from any penalties or protecting from government rules and regulations. newlineIn the market filter are manufactured using woven, nonwovens and membranes. Out of these nonwoven fabric fitters are widely used because of its unique advantages over other types. Both nonwoven fabric and membrane purification media together rule the filtration media market, with more than 90% joint market share in terms of roll goods. Higher volume of nonwovens in comparison to all other material forms is because they offer many unique technical characteristics like greater permeability, greater specific surface area, and smaller pore sizes with its controllable distribution. A lower energy consumption, better cake discharge properties, and diverse filtration mechanisms reward greater filtration efficiency over woven filtration media. newlineMany researchers have conducted various experiments to study influence of various parameters on nonwoven properties required for good filtration. But there is a need to conduct a systematic evaluation of a filter media for the effect of material properties fibre mix, denier, and resultant mass per unit area, on its properties and performance. Further, mathematical modelling to support the prediction and their interrelationship is also essential to develop. In the case of application, the effect on performance by varying the fluid flow rate and duration of use, the change in efficiency evaluation is also needed to be developed. newlineIn present work polyester and polypropylene fibre