Types of sizing | Faults in Sizing




On the basis of size percentage on yarn, sizing is classified into 4 types.




Techniques of sizing:

  1. Hot melt sizing

  2. Solvent sizing

  3. Foam sizing

  4. High pressure sizing

  5. Electrostatic sizing

  6. Emulsion sizing



Sizing machines:

1. Cylinder drying

a) Two cylinder types

b) Multi cylinder types

2. Hot air drying

3. Combined hot air and cylinder type

Size take-up:

The amount of size added on the yarn surface is called as size add-on.



Factors influences size take-up%:

  • Hairiness of yarn increases: size take up% increases

  • Immature fiber leads to increase in size take up%

  • Coarser yarn: size take up% increases

  • Finer yarn: size take up% decreases

  • Ends per inch increases : size take up% increases due to density.

  • Wet ability increases: size take up% increases due to moisture absorption

  • Uniform yarn: size take up% decreases

  • Warp tension increases: size take up% decreases

  • Size concentration increases: size take up% increases

  • Squeezing roller wt. increases: size take up% increases

  • Roller diameter increases: size take up% increases

  • Running speed increases: size take up% decreases

  • Yarn contact in size increases: size take up% increases



Faults in sizing:



0 comments

Recent Posts

See All