In this paper, full and hollow fibers having round and trilobal cross-sectional shapes were produced in equal manufacturing conditions and bending, drapability and crease recovery behaviors of the woven fabrics produced from these fibers were investigated. The bending rigidities of the fabrics produced from hollow fibers were higher than the bending rigidities of the fabrics produced from full fibers. The highest bending rigidities were obtained in fabrics produced from hollow round fibers. The bending rigidities and drapabilities of the fabrics produced from fibers of similar cross-sectional shapes were in close relation with each other. The fabrics produced from full fibers had higher drapabilities than those produced from hollow fibers. The fabrics produced from full fibers had higher crease recovery angles than those produced from hollow fibers. Considering that the construction properties of the fabrics were kept constant, it could be concluded that the differences among the properties of the fabrics which were produced from full and hollow fibers (for both round and trilobal cross-sectional shapes) basically emerged from the very high differences between moments of inertia of full and hollow cross sections. It was also considered that another factor which caused differences between the fabric properties was the different bulkiness of the fibers and also the different bulkiness of the yarns with the same counts. The best results could be obtained with round and trilobal full fibers at fabrics in which drapability and crease recovery are desired.

Natural perlite material was added for the first time into a polyester filament yarn structure. The water absorption and heat and sound insulation properties of the fabrics produced from textured and twisted polyester yarns containing 1.25% perlite additive were tested, and the results were compared with those obtained on the fabrics produced from reference polyester yarns. Although there are differences between the mechanical properties of the polyester yarns, the yarns including perlite remained within commercial usage limits. The thermal resistance values of polyester sateen fabrics obtained from perlite-containing yarns were higher than those of the reference fabrics. The contribution of perlite led to a marked improvement, especially in the hydrophilicity and sound insulation of the polyester fabrics.

asas

Abstract. This study presents an investigation of the effect of different structural parameters of cotton woven fabrics on their air permeability. For this purpose, 24 fabric samples having different structural properties were obtained by using three different weave types (plain, 1/3 twill and 1/7 sateen), two different weft yarn counts (Ne 20/2 and Ne 70/2) and four different yarn twist levels (120, 360, 600, and 840 turns/m). Cotton Ne 50/1; 150 turns/m warp yarns and 40 threads/cm warp density were used in all fabric samples. The relationship between the fabrics structural parameters like weft yarn count, weave type, yarn twist number and air permeability behavior are investigated. It has been shown that the increase of yarn counts and yarn twist led to an increase in air permeability values of cotton woven fabrics. Also, cotton woven fabrics with 1/7 sateen weave have the maximum air permeability value; these fabrics are followed by the fabrics having weave types of plain and 1/3 twill in spite of high weft density.

This study assesses the colour, colour difference and colour strength values obtained for eight disperse‐dyed polyester fabric samples produced from full and hollow round and trilobal fibres after four sets of abrasion cycle. Each fabric was produced from the same yarns in warp and weft directions. The L*, C*ΔE*ab and K/S values of the undyed fabrics and dyed fabrics before and after increasing cycles of abrasion are presented and discussed. Fabrics produced from full and hollow fibres showed great differences regarding colour values in abrasion behaviour. Fabrics produced from hollow fibres were found to be very sensitive to increasing abrasion cycles.