Abstract
The purpose of the study was to determine the effect of yarn count and courses per inch(CPI) of interlock knitted fabrics on the air permeability and heat transfer properties to provide the basic data for constructing high functional knitted fabrics were produced with excellent comfort. Nine interlock knitted fabrics were produced with different yarn count and stitch density for this stuffy(combination of Ne 30's, 40's, 50's(CM). and CPI of 34. 37, 40). Physical properties of nine knitted fabrics including air permeability and heat transfer properties were measured and analyzed statistically. The results were as follows; 1. Greater stitch density effects rather than yarn count effect on the variation of tile coefficient of surface friction was achieved. Thicker yarn count and lower CPI of knitted fabrics had greater variation of coefficient of surface friction. 2. Finer yarn count of knitted fabrics at constant stitch density and higher density of knitted fabrics at constant yarn count had excellent compressional resilience. 3. Air permeability of knitted fabrics Increased with decreasing thickness, weight and MTV(machine tightness factor) of knitted fabrics and with increasing air content in knitted fabric structure. TIV(thermal insulation values) of knitted fabrics increased with decreasing air permeability of knitted fabrics. Thicker yarn count of knitted fabrics at constant CPI had greater variation of TIV. 4. Warm sensation of knitted fabrics increased with increasing CPI and surface irregularity of knitted fabrics, while cold sensation increased with increasing coefficient of surface friction of knittell fabrics and air content in knitted fabric structure.