Mechanical properties of copper/cotton core-spun yarns produced by siro and ring spinning methods

431-436Copper/cotton core-spun yarns have been produced using siro and conventional ring methods, and their mechanical properties and cover factor are analyzed. The results indicate that the cover factor and tensile properties of copper/cotton core-spun yarns decrease with an increase in copper core diameter. Nevertheless, the siro copper/cotton core-spun yarns exhibit higher tensile properties as compared to conventional ring copper/cotton core-spun yarns

Mechanical properties of copper/cotton core-spun yarns produced by siro and ring spinning methods

Copper/cotton core-spun yarns have been produced using siro and conventional ring methods, and their mechanicalproperties and cover factor are analyzed. The results indicate that the cover factor and tensile properties of copper/cottoncore-spun yarns decrease with an increase in copper core diameter. Nevertheless, the siro copper/cotton core-spun yarnsexhibit higher tensile properties as compared to conventional ring copper/cotton core-spun yarns

Seam slippage and seam strength behavior of elastic woven fabrics under static loading

Effects of fabric extensibility and stitch density on seam slippage and strength behavior of elastic woven fabrics have been studied. Six fabric samples with different values of elasticity have been woven by changing the number of elastic core-spun cotton yarns and normal ring cotton yarns in the weft direction and then finished for sewing process. The samples are sewn with three stitch density levels (4, 5 and 6 stitches/cm) in warp direction and one stitch density level (5 stitches/cm) in weft direction. Fabric tensile properties, seam slippage load and seam strength have been measured and analyzed both in warp and weft directions. The results show that seam slippage and strength properties can be well explained in terms of fabric tensile properties. In general, increase in fabric extensibility leads to decrease in seam slippage load and seam strength in weft direction. In warp direction, seam slippage load also decreases with increase in fabric weft extensibility, whereas seam strength remains invariant. The results also reveal that the increase in stitch density results in a higher seam slippage load and strength value

BAGGING BEHAVIOUR OF EXTENSIBILE SHIRT FABRICS

Fabric bagging is a type of three dimensional permanent deformations of garments that occurs at positions such as elbow and knee. When a prolonged compression force is exerted on a garment during wear, the three dimensional deformation may involve complex inelastic behaviour in the garment, including viscoelastic behaviour of the fibers and plastic behaviour due to frictional movements between fibers and between yarns in the fabric. The aim of this stduy is to engineer extensibilty values of shirt fabrics along weft direction and hence to analyze and interpret the bagging behavior of extensible shirt fabrics in terms of fabric mechanical preoperties. In this study, finished extensible plain woven shirt fabrics with changing the core-spun extensible yarn layout along weft direction were produced. The bagging behavior of samples tested at a speed of 7 (mm/min) and initial bagging height 7(mm) in 5 successive cycles using an Instron tensile tester equipped with 4 circular clamps in 56, 61, 66 and 71 (mm) diameter. The results were then statistically analysed using ANOVA test method. The statistical analysis results show that fabric extensibility along weft direction and sample diameter has a statistical significant effect on bagging behaviour of extensible shirt fabrics. It is indicated with the increase in fabric extensibility and sample diameter the bagging parameters are significantly decreased

Seam slippage and seam strength behavior of elastic woven fabrics under static loading

221-229Effects of fabric extensibility and stitch density on seam slippage and strength behavior of elastic woven fabrics have been studied. Six fabric samples with different values of elasticity have been woven by changing the number of elastic core-spun cotton yarns and normal ring cotton yarns in the weft direction and then finished for sewing process. The samples are sewn with three stitch density levels (4, 5 and 6 stitches/cm) in warp direction and one stitch density level (5 stitches/cm) in weft direction. Fabric tensile properties, seam slippage load and seam strength have been measured and analyzed both in warp and weft directions. The results show that seam slippage and strength properties can be well explained in terms of fabric tensile properties. In general, increase in fabric extensibility leads to decrease in seam slippage load and seam strength in weft direction. In warp direction, seam slippage load also decreases with increase in fabric weft extensibility, whereas seam strength remains invariant. The results also reveal that the increase in stitch density results in a higher seam slippage load and strength value