YARN PROCESSING :

Yarns composed of staple fibres are manufactured by either cotton or woolen system .

COTTON SYSTEM OF YARN PROCESSING

A) SALTING AND BLENDING : Cotton comes into processing unit in large bales to make cotton yarns or the yarns that are blend of several fibres with uniform quality are combined from several bales . The bales are opened and thin layers of fibres from these bales are put into the blending machine . The machine loosens and seprates the clsely packed fibres and removes any dust(seeds, twigs etc) and blend the fibre into a uniform mixture.

B) PICKING: After blending the fibres go to the picking machine .These machine clean them further and form them into lap which is 45" wide. It is called the Pickle Lap.

C) CARDING: The pickle lap is put into the carding machine . This step continues the cleaning process, removing fibre which are too short . The fibre are straighten into a thin uniform weft . The weft moves into a funnel shaped device where it is gathered into a soft mass and forms card silver which is about one inch in diameter.

D) COMBING: For highquality of yarn of outstanding eveness, smoothness, fineness and strength the fibreare combed . Fibre are completely removed as they come out of the combing machine in the the form of comb silver.

E) DRAWING : Drawing follows either carding or combining depending on the quality of yarns. Many silvers are combined and put into drawing machines where they are put together to be drawn out into a silver not larger than the original single silver . If blends of two or more yarns are done then silver will be of two different fibres . for eg: Blend of cotton and polyester.

F) ROVING : The silver is taken to the roving machine where it is made in until it measure one- fourth to one -eight of its original diameters.

G) SPINNING: The final process in the manufacture of yarns is the spinning process. Here the yarn is stretch to its ultimatediameter and a desired amount of twist is inserted.