The Effect of Sample Diameter and Test Speed on Bagging Behaviour of Worsted Fabrics

Abstract

In this research, the effect of test speed and sample diameter on bagging behavior of worsted fabrics was investigated. Circular clamps in 56, 61, 66, and 71 mm diameter were constructed and then mounted on an Instron Tensile Tester machine. Different worsted fabrics with 45-55, and 20-80 wool-polyester fiber blend ratios were prepared and then the bagging behavior of these fabrics at different test speed (5.0, 6.0, and 7.5 mm/min) and under five cycles were investigated. The different bagging parameters including maximum bagging force at the first and last cycle, bagging resistance, fatigue and residual bagging height were calculated. The result shows that the test sample diameter significantly affects on bagging behavior of worsted fabrics. With increasing test sample diameter, different bagging parameters significantly decrease. It is shown that bagging fatigue and residual bagging height of worsted fabrics tested at 7.5 mm/min speed significantly are higher than at 5 and 6 mm/min speeds. However, the result of experiment shows that the effect of test speed on bagging force and bagging resistance is in-significant. The results of this research revealed that worsted fabric samples with higher wool fiber content exhibited lower bagging force, bagging fatigue, bagging resistance and residual bagging height.