Porosity and air permeability relationship of denim fabrics produced using core-spun yarns with different filament finenesses for filling

Esin Sarıoğlu,Osman Babaarslan

doi:10.1177/1558925019837810

Esin Sarıoğlu, Osman Babaarslan

Open Access

https://doi.org/10.1177/1558925019837810

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Abstract

In this article, porosity and air permeability of denim fabric produced from filament core-spun yarns with different filament fineness and yarn linear density were demonstrated. For this purpose, 110 dtex drawn textured polyester filaments with conventional, fine, and micro finenesses were used as core part, and combed cotton fiber was used as sheath part to obtain core-spun yarns with four different yarn linear density on a modified ring spinning system with the same spinning parameters. Besides the production of core-spun yarns, 100% cotton ring-spun yarns were produced as control group at the same conditions for each yarn linear density, as well. To evaluate the effect of filament fineness and yarn linear density on air permeability and total porosity, denim fabrics were obtained by using 24 yarn samples as weft at the same cover factor with four determined weft densities. Results showed that filament fineness and yarn linear density have a significant effect on total porosity and air permeability at a significance level of 0.05. In addition, high correlation (79.4%) between air permeability and total porosity of denim fabric samples was observed at a significance level of 0.01.

Highlights

The air permeability of a fabric is one of the very important properties of fabrics, which depends on the structural parameters of fabrics such as fiber density, yarn type, yarn linear density, fabric density, and weave construction
Denim fabrics from microfilament cotton-covered core yarn have the lowest values of air permeability and total porosity that enables a better thermal insulation for winter use
The multivariate analysis leads to the conclusion that the influence of filament fineness and yarn linear density is statistically significant on air permeability and total porosity of denim fabrics

Summary

Introduction

In determination of the appropriate comfort properties of fabrics, air permeability has great influence on transportation of the moisture from body to environment, apparel comfort, thermal insulation properties, the rate of liquid penetration during wet processing, and liquid removal during drying of fabrics.[1,2,3,4] Air permeability of woven fabric is mainly dependent on the fabric structural property that is related to fiber density, linear density of warp and weft yarns, type of yarn, weave construction, warp and weft density etc.[4,5,6] All these parameters have strong effects on porosity of fabric which can be expressed as the ratio of air space to the total volume of the fabric expressed as percentage.[1,2,3,7,8,9,10] The total porosity of woven fabrics comprises two types of pores: pores between warp and weft yarns (inter-yarn porosity or macro porosity) and void space contained between the fibers in the yarn (intrayarn porosity or micro porosity).[3,6,7] Total porosity of Creative Commons CC BY: This article is distributed under the terms of the Creative Commons Attribution 4.0 License (http://www.creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).Journal of Engineered Fibers and Fabrics

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