Thesis Details


Thesis Title: A model to quantify the effect of fiber properties and processing parameters on the strength and abrasion resistance of random velour needlepunched nonwoven fabric
Thesis Author: Kelly Piecara
Abstract: Many needlepunched nonwoven material research proj ects have investigated the impact of needle punch density and depth of penetration on the consolidation of fibrous webs for a fabric with no surface structure; however, further research has been recommended to address physical changes in the abrasion resistance properties as a result of fiber and processing modifications. Currently, there is limited research on the effects of fiber properties and process parameters on the abrasion resistance properties of random velour needlepunched material, and their application is limited by the poor resistance to abrasion of the fabric. By developing some essential understanding of the mechanisms of resistance to abrasion, current textile products can be improved by prolonging the life of the fabric. For this research, 65 unique conditions of random velour needlepunched nonwoven material were produced by varying the fiber denier, needle punch density, needle board arrangement, and the needle type utilized during flat felt processing. The results include a theoretical model for predicting the cross-direction breaking modulus and the loss of cross-direction breaking modulus when abrasion forces were applied for random velour needlepunched nonwoven material made from polypropylene fiber. The model incorporates various fiber and processing parameters, including: fiber denier, fiber length, fiber coefficient of friction, fiber density, fiber breaking modulus, fabric thickness, needle board arrangement during flat felt processing, and the number of abrasion cycles applied using the Taber Abraser. The results also include an empirical model describing the rate of weight loss due to abrasion forces applied to the material.