Performance characteristics of filter fabrics in cement dust control: Part II-Influence of fibre cross-sectional shape and scrim on the performance of nonwoven filter fabrics

Abstract

<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:calibri;mso-bidi-theme-font:minor-latin;="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">The influence of fabric weight, reinforcing material and polyester fibre of three different cross-sectional shapes on the characteristics of needle-punched nonwoven polyester filter fabrics has been studied. Hollow fibre fabrics exhibit higher air permeability followed by trilobal and normal round fibre fabrics. Trilobal fibre fabrics show higher filtration efficiency. However, for a given pressure drop level, higher filtration efficiency is achieved by hollow fibre fabrics. Improved performance in terms of mechanical properties is seen with the hollow fibre filter fabric, followed by trilobal and round fibre fabrics. Increased fabric weight causes reduction in air permeability, increase in filtration efficiency at the cost of higher pressure drop, and better mechanical properties. Use of reinforcing material leads to reduction in air permeability, increased filtration efficiency and pressure drop, and improved mechanical properties.</span>