Main Objects of Warp Yarn Sizing | Disadvantages of Sizing in Weaving

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Purpose of Yarn Sizing | Tension Control in Sizing Process | Automation in Sizing

Importance of Warp Yarn Sizing in Weaving:
Sizing is an important process of textile weaving processes. It is necessary to size the warp yarn because of some key reasons which are deeply discussed in the following:

  1. To strengthen the yarn by causing the fibres to adhere together.
  2. To make the other surface of the yarn smoother so that here protruding from one yarn in the warp should not become entangled with hair protruding from a neighboring yarn.
  3. To lubricate the yarns so that there is less friction when they rub together in the weaving process. The reduction of friction reduces the forces acting on the yarns during weaving.
Sizing process in weaving
Fig: Sizing process in weaving
Disadvantages of Sizing in Weaving Technology:
The main disadvantages of sizing in textile weaving have pointed out in the below:

  1. Labour,
  2. Costing of size ingredients,
  3. Reducing warp yarn extension,
  4. Increasing pollution,
  5. Size removal difficulties,
  6. Costing of water or power,
  7. Degradation of yarn quality,
  8. Rough surface of warp yarn because of uneven size solution, sometimes increasing co-efficient of friction,
  9. Increasing warp yarn stiffness,
  10. Strong power to drive loom,
  11. Long preparatory process,
  12. Less yarn length on warp loom,
  13. Variation in dye take-up percentage,
  14. De-sizing cost,
  15. Capital investment,
  16. Formation of size ingredients,
  17. Less yarn or inch because of increasing diameter,
  18. More strong loom,
  19. Color intensity fading,
  20. Probability if some changes in fibre structure.
Tension Control in Sizing Process:
Controlling of tension which are followed during sizing processing are-

  1. Spreading tension,
  2. Wet zone tension,
  3. Let off motion,
  4. Dry zone tension,
  5. Winding on tension,
  6. Inlet motion.
Automation in Sizing Process:
Automation in sizing process have pointed out in the below:

  1. Control of size level,
  2. Control of steam pressure,
  3. Control of size temperature,
  4. Stretch control,
  5. Moisture control in sized warp,
  6. Controlling of measuring unit.

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