Properties of Size Ingredients | Size Ingredients and Their Functions

Size ia 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.

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