Properties of Size Ingredients | Size Ingredients and Their Functions

Size and Sizing:
Size is a coating with a gelatinous or other substance to add strength or stiffness or to reduce absorbency. Sizing is the process of applying the size material on yarn.
Size Ingredients
Size Ingredients
Properties of Size Ingredients
  • Ease of preparation
  • Uniform viscosity
  • Absence of prolonged congealing and kenning at application temperature
  • pH control
  • Absence of foaming properties
  • Absence of prolonged tackiness
  • Compatibility with other components of the size
  • Stability towards decomposition
  • Ease of desizing
Size Ingredients and their functions

Adhesive: Example: maize, wheat, corn, potato, ferina, sago, PVC, PVA, CMC
Function: It increases yarn strength and abrasion resistance

Lubricant: Example: mineral oil, linseed oil, tallow, Japan was, cotton oil
Function: Increases yarn smoothness and elasticity

Antiseptic agent: Example: ZnCl2 , Phenol, carboxylic acid, synthetic acid
Function: It helps to store the yarn without being damaged and it also gives protection from bacteria or fungus.

Deliquescent agent: Example: MgCl2, glycerin
Function: It prevents brittleness of size and helps to keep the standard moisture regain by not allowing water to enter or exit the fibre.

Weighting agent: Example: china clay, French chalk
Function: It increases the weight of the yarn

Wetting agent: Example: MgCl2
Function: Helps to wet the yarn instantaneously

Tinting agent: Example: Blue
Function: It helps o increase the brightness of yarn

Antifoaming agent: Example: Benzene, Pyridine
Function: It prevents the formation of foam


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