Investigation of the effects of filament fineness and disc type on yarn physical and mechanical properties of DTY polyester yarns

Polyester fiber has found usage as carpet yarn in different forms such as ATY (Air Textured Yarn), DTY (Drawn Textured Yarn), BCF (Bulked Continuous Filament). Filament fineness is an important parameter which affects the yarn properties. In this context, it is expected that pile yarns produced with different filament finenesses will have different breaking strength, breaking elongation, crimp contraction, and shrinkage properties, so carpets produced from these yarns will have different resilience property. In addition, usage of polyurethane and ceramic discs which have different characteristic, affect DTY yarn properties. In this study, physical properties of DTY polyester pile yarns produced with different filament numbers and different discs were investigated. 1200 denier DTY pile yarns were produced by combining filaments with 3.13, 2.08, 1.56 dpf filament fineness. Yarn production was carried out by false twist texturing method with polyurethane and ceramic discs. DTY pile yarn samples were subjected to breaking strength, breaking elongation, crimp contraction and shrinkage tests. It was observed that filament fineness had no significant effect on breaking strength but had significant effect on breaking elongation, crimp contraction and shrinkage tests. Also, disc type had significant effect on breaking strength, breaking elongation, crimp contraction and it did not have significant effect on shrinkage test.