What is Mercerisation process?

Mercerisation is an industrial process involving sodium hydroxide for cotton yarns or fabrics to increase the lustre and dyeability. Mercerisation of denim may be used for achieving ring dyeing, thus keeping the dye on the surface of the yarns or fabrics and to prevent dyes from fully penetrating the fibres.

Why is Mercerisation necessary for cotton?

Mercerisation is a textile finishing treatment for cellulose fabric and yarn, mainly cotton and flax, which improves dye uptake and tear strength, reduces fabric shrinkage, and imparts a silk-like luster.

What is meaning of mercerized?

Mercerization, in textiles, a chemical treatment applied to cotton fibres or fabrics to permanently impart a greater affinity for dyes and various chemical finishes.

What is preparatory process?

preparatory processes have to be undertaken to get rid of natural and added impurities. The processes of desizing, scouring, bleaching, etc.

Why is Mercerization important?

Mercerization is one of the most important finishing processes of cotton with a strong caustic alkaline solution in order to improve the lustre, hand and other properties. It imports gloss to the fibre, increases its hygroscopicity, strength and improves its dye affinity.

Which chemical is used in Mercerizing process?

sodium hydroxide (NaOH)
The alkaline treatment or mercerization is a chemical treatment in which the natural fibers are immersed in a known concentration of aqueous sodium hydroxide (NaOH) for a given temperature and a period of time.

What are the main objectives of Mercerizing process?

Mercerizing is the process of treating cellulosic elements with cold or hot caustic conditions to improve their appearance and physical as well as chemical properties under certain conditions. In simple words, the process of treating caustic alkali under pressure for increasing color, strength, and luster.

What are the benefits of Mercerization?

Benefits of Mercerization

• To increase silk-like luster.
• To improve moisture regain/content.
• To increase dye absorbency.
• To improved strength and elongation properties.
• To increase smoothness and hand feel is good.
• To stabilized the strength of yarn or fabric.

What is Mercerizing machine?

The mercerizing process for finishing fabrics made of cotton in a top-quality product. A higher dye pick-up as well as the silky luster is decisive for an elegant appearance of mercerized fabric such as outerwear, table linen and bed linen.

What are the 2 main types of finishing processes for fabrics?

On the basis of processes involved in application of finish, there are two types – chemical (wet) and mechanical (dry) finishes. i Chemical finishes: These are also known as wet finishes. In these, chemical treatment is given to fabric, either to change its appearance or basic properties.

Why do we need preparatory process?

Preparatory process of dyeing are necessary for removing impurities from fibers and for improving their aesthetic appearance and processability as fabrics. Removal of impurities increases absorbency and whiteness. If a fabric is absorbent it is easier to dye – which is why need increase absorbency.