Changes in Fabric Mechanical Properties After Pressure Decatizing as Measured by FAST

Abstract

We have investigated the effects of decatizing temperature, prior rotary pressing, and fabric initial regain on the mechanical properties of decatized fabrics of various constructions and dyeing stages. Undyed and plain weave fabrics were the most sensitive to decatizing treatment. Higher decatizing temperature consistently increased exten sibility and bias extension and decreased bending rigidity. Rotary pressing had a marked influence on the mechanical properties of fabrics subsequently set by pressure deca tizing ; the resulting decrease in tensile properties and increase in bending rigidity are explained by simple mechanisms. The magnitude of changes in the warp and weft extensions, bias extension, and bending rigidity with setting temperature and rotary pressing is analyzed and discussed in relation to various fabric types.