Prediction of Fabric Bagging from Mechanical Properties

Abstract

An objective evaluation method is proposed for predicting the bagging propensity of woven fabrics. The volume of the bagged fabrics was used as a measure of the bagging propensity. Dynamic creep caused by repeated shear deformation under con stant tension was measured in addition to the basic mechanical properties of fabrics. The correlations between the bagging volume of fabrics and their mechanical properties were examined statistically. For stretch fabrics, the bagging volume was correlated strongly with hysteresis behavior in tensile, bending, and low angle shearing defor mation measured after wetting conditioning for 5 hours at 32°C and 90% RH and with the value of the strain at t = 0.1 minutes, &(0.1) from the dynamic creep test. For conventional fabrics, a strong correlation was observed between the bagging volume and the value of the strain &(0.1) as well as the creep rate kd from the dynamic creep test. The equations for predicting fabrit bagging were obtained by statistical analysis of the relationship between the bagging volume of fabrics and their mechanical prop erties.