Thesis Details

Thesis Title: The effect of filament type, stitch type, and fabric preparation on double-needle-bar raschel velour automotive fabric
Thesis Author: Jason Epps
Abstract: The leading type of yarn used in the production of warp knit automotive fabrics is polyester textured continuous filament, derived from partially oriented yarn (POY) and warp drawn POY. Advances in fiber spinning technology have introduced new filament yam products in recent years. These products are the results of high-speed spinning that unlike POY products do not require drawing. Filament spinning speeds have increased from 1,000 meters per minute to greater than 6,000 meters per minute. High-speed spun filaments have different morphology than conventional POY derived filaments. New generation (high-speed spun) filaments have higher elongation, different shrinkage properties, and different dye uptake than conventional yarns. Therefore, fabric production techniques may need to be different. New generation filaments have not been studied for suitability in automotive end uses. New generation yarns are important to automotive fabric producers in order to reduce cost and to provide a new raw material option. This research determined the effects of filament type, stitch type, and fabric preparation on fabric properties of DNB Raschel velour automotive fabric. This research provides an understanding of the filament morphology and properties of POY derived yarn, undrawn POY, and two types of high-speed spun filaments. This research determined the similarities and differences between fabrics that were produced with different filament types, stitch types and fabric preparation techniques. The similarities and differences between the fabrics were explained according to morphological and physical property differences between filament types.