The aim of this study was to find out the effect of tightness factor of knittedfabrics on their air permeability and thermal transportation. In this study various structured knittedfabrics were produced. Physical parameters such as tightness factor, GSM, air permeability, Course per inch and Wales per inch, porosity and optical porosity were measured and calculated by the standard procedures and methods. From the data gathered, it is evident that as GSM of knittedfabrics increases as their tightnessfactor increases. Analysis of data reveals that non linear relation exists between air permeability and tightness factor of cotton knitted fabric. Similarly non linear relation exits between air permeability and tightness factor of acrylic and viscous yarn knitted fabrics too. Air permeability of knitted fabric increases as porosity increases. A positive relation exists between the theoretical porosity and the optical porosity. There is no consistent trend has been observed in thermal transportation ofknittedfabrics.
展开▼
