Find Out The Count Of Yarn In All 5 Popular Systems By Gravimetric Method

OBJECT:

            Find out the count of yarn in all 5 popular systems by gravimetric method. Calculate the length of yarn in package.

INSTRUMENT/TOOLS:

            Wrap reel, weighing balance etc.

WORKING PRINCIPLE:

            Yarn count is a numerical value, which express the coarseness and the fineness of a yarn and also indicate the relation between length and weight of the yarn.

            Linear yarn density is determined by the mass of specified length of yarn and expressed in count numbers in different systems. There are two count systems direct and indirect count systems, direct system popularly includes Tex system and Denier system while indirect system popularly includes the English cotton count (Ne), Metric count (Nm) and Worsted count system.

PROCEDURE:

•        On the wrap reel, put the yarn package on creel and pass the yarn through the lappet guides and tie the initial end on screw.

•        Wrap the yarn of 120 yards on wrap reel by revolving it at constant speed till the counter again reaches zero.

•        Knot the lea and take it out from reel.

•        Weigh it on the weighing balance to calculate the count.

FORMULA:

           

 RESULT:

            Avg. count in tex count system ………………………………………………….

            Avg. count in English cotton count system ………………………………………….

            Avg. count in denier count system ………………………………………………..

            Avg. count in woolen count system ………………………………………………….

            Avg. count in worsted count system ………………………………………………..

Coefficient of variation % ………………………………………………..

Length of yarn in package ………………………………….

PRECAUTIONS:

•        Maintain uniform tension in yarn while reeling on wrap reel.

•        Sample weight should be taken carefully.

•        Winding should be done at constant rate for proper uniform tension.

•        Make the proper calculation for less error in result.