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Abstract
The w ide range c onsumption o ft he k nitted fabrics, specially in outerwear clothing, leads to the condensed attention of the garment designers. An i ntroduction o ft he s pandcx yarns in the knitted fabric structure is one o fthe attractive research topics. Knitted fabrics contain s pandex yarn h ave special characteristics help the garment designers to create new models with specific styles. The aim of this work was to study the interaction between the spandex parameters ( rate of feeding, count, tension ), cotton yarn parameters ( rate of feeding, count ), and the churactenstics of the produced fabric ( loop length, spandex percentage, wale density, course density, stitch density, fabric thickness, fabric width, fabric areal density, kibric spiralily, fabric shrinkage ). The investigation was extended to cover the different fabric relaxation states: dry grey relaxed state, grey reference relaxed state and bleached reibrence relaxed state, The quadratic multi regression analysis was applied to study the correlation between the spandex and cotton yarn parameters. Also, the characteristics of the combined cotton./spandex knitted fabrics were investigated. It has found a strong correlation between the amount of spandex and the mentioned fabric characteristics. Also we found a good correlation for the interaction between parameters and properties. The behavior was also affected by the wet treatment of fabrics as it has been shown from the regression equations applied on each state of relaxation. It was found also that the count of spandex thread must be compatible with the count of cotton yarn. As the behavior or the tendency of characteristics is still the same, but it varies by the cotton yarn count and the rate of cotton yarn feeding. More work in this topic is still required in the field of dyeing and finishing.