Prediction of Mechanical, Evenness and Imperfection Properties of 100% Cotton Ring Spun Yarns with Different Twist Levels

Gashaw Ashagre Walle,Ermiyas Tarekegn,Addisu Wudneh,Addisu Desalegn,Desalegn Atalie

doi:10.22581/muet1982.2201.02

Gashaw Ashagre Walle, Ermiyas Tarekegn + Show 3 more

Open Access

https://doi.org/10.22581/muet1982.2201.02

Copy DOI

Abstract

The purpose of this research work is to develop a model to predict the effect of twist on mechanical, evenness and imperfection properties of 100% cotton ring spun yarns. Eight yarns were manufactured from 30Tex with four yarn twist increments (700, 740, 780 and 820TPM), and 15Tex with twist levels of 900, 1020, 1080 and 1140TPM (turns/meter). Except yarn count and twist level, the yarns were made from the same fiber properties and machine settings. Yarn mechanical properties such as tensile strength, elongation and abrasion resistance, evenness (CVm) and imperfection characteristics like hairiness, neps, thin and thick places were measured and statistically analyzed. Equations were developed to predict the desired mechanical, evenness, and imperfection properties of yarns based on yarn count and twist levels. Statistical analysis showed that yarn properties are significantly influenced by count and twist level changes. The tensile strength, elongation, abrasion resistance, CVm, hairiness and thick places of the studied yarns were significant at P-values of 0.000, 0.003, 0.000, 0.004, 0.000 and 0.015 respectively. Generally, as yarn twist increases, breaking strength and abrasion resistance increase, whereas elongation, hairiness, coefficient of mass variation (CVm), thin and thick places, and nep of yarn decrease. Therefore, the formulated multiple regression equations would be useful in predicting yarn properties based on its count and twist.

Highlights

Yarn twist is one of the major factors which is controlled every day in textile companies
Yarn made from 30Tex and twist of 700TPM had the least strength of 206 cN/tex and cotton yarn mode from the highest twist (1140 TPM) finer yarn count of 15 Tex had higher tensile strength of 277.7 cN/tex followed by yarns made from 1080, 1020, 900, 820, 780 and 740TPM respectively
The findings reveal that yarn elongation was affected by yarn twist levels at F-value of 26.540 and P-value of 0.003

Summary

Introduction

Yarn twist is one of the major factors which is controlled every day in textile companies. It is a crucial issue during the production of yarn directly to the market or subsequent operations because it affects yarn parameters, fabric properties, production, and final productivity. Twist is imparted on the surface of the yarn and almost all the fibers are uniformly integrated along the spiral line of twist. In rotor spun yarn, twist is applied in the yarn core and it has wrapper fibers [2]. Twist imparts cohesion between the fibers and contributes to prevent damage when the yarn is subjected to any

Methods

Results

Conclusion