2018 Cilt 23 Sayı 3

Permanent URI for this collectionhttps://hdl.handle.net/11452/12497

Browse

Browsing by Subject "Air permeability"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Effect of wet laundering on stretching and air permeability properties of polyester warp knitted fabrics with different fabric weights
    (Bursa Uludağ Üniversitesi, 2018-10-08) Günaydın, Gizem Karakan; Çeven, Erhan Kenan; Mühendislik Fakültesi; Tekstil Mühendisliği Bölümü
    Warp knitting technology combines the two properties of dimensional stability and elasticity which are provided from woven and knitted fabrics separately. These fabrics consist of several threads (warp) which are formed as loops via needles and run through the fabric mainly in a vertical direction. These fabrics may be produced on a flat or a circular warp knitting machines. This study aims to investigate the influence of washing cycles (1, 5 and 20) on stretching (%) and air permeability properties of the polyester warp knitted fabrics of different weight. In order to analyze the effect of washing process on stretching ratios (%) and air permeability of the samples; Fyrma fabric extensometer and SDL Atlas M021A model Air Permeability Tester devices were used respectively. Additionally, the changes in fabric weight according to washing cycles of 1, 5 and 20 were also evaluated. According to test results; the stretching properties and air permeability values of the polyester warp knitted fabrics produced in different weights varied according to the laundering cycle which emphasized that caring processes should also be considered during the evaluation of mechanical properties (such as stretching, air permeability properties) of polyester warp knitted fabrics.
  • Thumbnail Image
    Item
    Investigation of the effect of apparel fabrics structure on air permeability and thermal comfort properties
    (Bursa Uludağ Üniversitesi, 2018-11-08) Gürarda, Ayça; Zengin, Tuğba; Tosun, Gökçe; Mühendislik Fakültesi; Tekstil Mühendisliği Bölümü
    Fabric structure has a major effect on air permeability and thermal comfort properties of apparel fabrics. Air permeability and thermal comfort properties of apparel depend on fabric structural properties such as weave type, fabric thickness, weight, yarn density and cover factor. Thermal conductivity, thermal diffusivity, thermal absorptivity, thermal resistance and air permeability should be measured to test thermal comfort properties of fabrics.The purpose of this study is to investigate the effect of the apparel fabrics structure on air permeability and thermal comfort properties. For this reason, air permeability and thermal comfort properties of viscose / polyester blended woven fabrics of different structures which are widely used in apparel have been examined. According to the results, a negative correlation was observed between weight, thickness, cover factor and air permeability of the fabrics. A positive correlation was observed between weight, thickness, cover factor and thermal conductivity of the fabric samples. A positive correlation was observed between weight, cover factor and thermal absorptivity of the fabric samples. Also positive correlations were observed between thickness- thermal resistance and thickness- thermal diffusivity of the fabric samples.