Types Of Sizing Application Methods | Technical Changes Due To Sizing

Sizing is called the heart of weaving. Sizing is the process by which a protective adhesive coating is applies on a yarn surface. It increases the efficiency of weaving process.
Types of sizing: Sizing process is classified as follow:

  • Pure Sizing: Application of size ingredients up to 10%.
  • Light Sizing: Application of size ingredients 11% to 15%.
  • Medium Sizing: Application of size ingredients 16% to 20%.
  • Heavy Sizing: Application of size ingredients above 40%.

Types of sizing application methods or techniques: There are different application processes by which size materials are applied on yarn surface. Followings are the application methods.

  1. Hot melting sizing
  2. Solvent sizing
  3. Foam sizing
  4. High pressure sizing
  5. Electrostatic sizing
  6. Emulsion sizing
  7. Combined sizing
  8. Slasher sizing

Drying system: After application of size materials on yarn surface, it needs to dry to fix the size on the yarn. Following are the drying system.

  1. Two cylinder drying
  2. Multi cylinder drying
  3. Hot air drying
  4. Infrared drying
  5. Combined drying

Technical changes due to sizing: After application of size ingredients on the yarn surface, following changes are occurred. They are:

  • Increase in breaking strength.
  • Increase stiffness.
  • Increase abrasion resistance.
  • Increase elasticity.
  • Increase smoothness.
  • Increase actual diameter, but decrease apparent diameter.
  • Decrease in hairiness.
  • Decrease in extension.
  • Decrease elastistatic charge.

Sizing is done during beam preparation. If sizing is done perfectly then it is possible to get a good qualified woven fabric.
So, we should be careful about the application of the sizing and its drying system.

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