Define Sizing | Objects of Sizing | Types of sizing | Properties of Size Ingredients

Friday, May 18, 2012

Define Sizing | Objects of Sizing | Types of sizing | Properties of Size Ingredients | Disadvantages of Sizing

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.

Disadvantages of Sizing

Cost of land and machine is high

Requires lot of labors

Requires utility like gas, electricity etc and their cost is high

Cost of ingredients

The process is long and it takes time

There is a risk of degradation of yarn

The yarn diameter is increased

Requires robust loom

It increases yarn stiffness

The fabric needs to be desized before use

Need knowledge and information about the size ingredients

There is a risk of pollution

Sizing changes the shade of colored yarn

100% size material cannot be removed

Size material presence leads to uneven dying

Textile Technology

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Friday, May 18, 2012