Study of mechanical properties of optimised ceramic/glass fibre needle-punched nonwoven fabrics part II: stitch bonding technique

Abstract

Fibrous construction and combination of different fine/coarse fibres, bonding techniques and the directional arrangement of fibres are the significant performance parameters of the unique characteristics in nonwovens and their composites applications in filtration products. After the ceramic/glass fibre needle-punched nonwoven characterisation, the diagonal stitch bonding made with PTFE-coated glass yarn on the nonwoven which influenced more on the tensile properties increased by 1.91–2.36 times than their initial strength and this is mainly due to the glass yarn which supporting the nonwoven fabric reducing the glass fibre slippage. The bursting strength significantly increased in a range of 1.4–1.6 times comparatively lower than tensile strength improvement where this minimal increase due to testing sample parameters where the glass fibre length itself supported the bursting strength 40 mm diaphragms. Further, to improve the tensile properties of the optimised samples, they were stitch bonded with 200 Denier glass fibre yarn diagonally at 10 mm intervals and analysed for their tensile behaviours as well as their physical and filtration characteristics.