Abstract
This paper is focused on change in shrinkage, GSM, Wales per Inch and Course per Inch due to structure and count variation and state variation. This work was carried out with 12 samples of single jersey, single lacoste and weft lock knit fabrics of different counts which were scoured with NaOH. After pretreatment process the samples were tested for widthwise shrinkage, width, GSM, Wales per Inch and Course per Inch and compared between different states like grey state and finished state. The result obtained in this research indicated that physical properties like structures with tuck stitch possess higher value of widthwise shrinkage, width, GSM and Wales per Inch and Course per Inch value lowers prominently in those structures having float or miss stitches. In both cases i.e. grey state and RFD state values of those properties are high in coarser yarn and low in finer yarn. During project knitted fabrics specification along with machine specification and major factors which are necessary to calculate different types of variation and variables on which the whole fabric construction depends were managed to watch carefully. Main efforts were to develop a dependable way so that the resulting fabric specifications with required configuration can be easily visualized and be forecasted. A great emphasization was provided to the adjustable points on which fabric GSM, stitch length, fabric width and shrinkage percentage directly or indirectly depends.
Highlights
After pretreatment process the samples were tested for widthwise shrinkage, width, GSM, Wales per Inch and Course per Inch and compared between different states like grey state and finished state
Determination of WPI After relaxation & conditioning of knit fabric samples, the numbers of wales in a 1” length of fabric were determined at five different places on every sample with a magnifying glass, and the average values were calculated of 26 s and 30 s carded yarn at both grey and scoured state for all three structures—Single Jersey, Single Lacoste & Weft Lock Knit
Determination of CPI After relaxation & conditioning of knit fabric samples, The numbers of courses in a “1” length of fabric were determined at five different places on every sample with a magnifying glass, and the average values were calculated of 26 s and 30 s carded yarn at both grey and scoured state for all three structures—Single Jersey, Single Lacoste & Weft Lock Knit
Summary
Fabrics are most commonly woven or knitted but the term includes assemblies produced by felting, lace making, net making, non-woven processes and tufting This project is basically on knitted fabric specification and machine which are related to knitted fabric production. Other specifications like fabric width, fabric thickness, fabric shrinkage % are generally maintained in industries by previous data sheet For this reason problem arises when any order comes which does not have a historical document. Target of this project is to find out the easy process to get decision about yarn count selection, loop length selection, machine diameter selection and machine gauge selection. The properties of knit fabric are changing with change of count of the yarn by keeping the parameters of knitting machine (dia, gauge, stitch length) same in every case.
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