What is Anti pilling finishing

Anti pilling finishing

Pilling is the formation of small knots of fibres on surface of the fabric.
This entanglement of fiber spoils the appearance of The fabric.
the main reason for this formation of pills is that the high tenacity fibres like 'PET, Nylon form pills. The problem of pilling is mainly in polyester blends.

anti pilling

Factor influencing pilling

1) Fibre characteristics like staple length, denier and cross section
2) Yarn construction.
3) Fabric construction.

Anti pilling treatment

1) Mechanical treatment.
2) Chemical treatment

Mechanical treatment

Cropping, Shearing and Singeing include in this category
In cropping and shearing, the fabric is first sheared and then cropped. The process is repeated two or three times

It is then singed. This is the most important operation for reducing pilling.
During singeing, the protruding fibres are burnt. They actually soften and melt forming beads on the surface on fabric.
During dyeing, it will give a Specky appearance. Hence, singeing is carried out after dyeing.
Heat setting at 150°C for 5 minutes also reduces of pilling and is carried out after singeing and before washing off.

Chemical treatment

 In one operation, 'he fabric is treated with 2 gpl of Caustic soda solution at 60°C for 30 minutes, washed, dried, and heat set.

In another method, the fabric is treated with 3.5 % Ammonia solution at 180°C for a few minutes, followed by washing and drying.
The mechanism involved in the above two  methods is to reduce the Strength of the fiber resulting in Lower Pilling
Another simple method of reducing the pilling tendency is to apply a solution of Adhesive or Resin so as to make the fibres clearing more strongly to each other in the yarn and fabric. However, that would create a Harsh handle on the fabric

 For this finish , a 2.6 % aqueous emulsion of polyvinyl Chloride is applied by , Pad -Dry - Cure method

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