Textile & Fashion World

Size is a gelatinous film forming substance in solution or dispersion form, applied normally to warp yarns. It can sometimes be applied to weft yarns.Sizing is the process of applying the size material on yarn.A generic term for compounds that are applied to warp yarn to bind the fiber together and stiffen the yarn to provide abrasion resistance during weaving. Starch, gelatin, oil, wax, and manufactured polymers such as polyvinyl alcohol, polystyrene, polyacrylic acid, and polyacetates are employed. 2. The process of applying sizing compounds. 3. The process of weighing sample lengths of yarn to determine the count.

Objects of Sizing 

1. To protect the yarn from abrasion 

2. To improve the breaking strength of the yarn

3. to increase smoothness of yarn

4. To increase yarn elasticity

5. To decrease hairiness

6. To decrease the generation of static electricity

Types of sizing 

Pure sizing: when the size pick up % is about 3 – 10 % it is called pure sizing.

Light sizing: when the size pick up % is about 11 -16% it is called light sizing.

Medium sizing: when the size pick up % is about 17 – 40 % it is called medium sizing.

Heavy sizing: when the size pick up % is above 40 % then it is called heavy sizing.