In this video, I am talking about the mercerization process.
Effect of mercerization and its importance:
John Mercer discovered in the year 1844 the mercerization process. He found that tensionless treatment of cotton fabrics with strong caustic soda solution improves the below properties of the cotton fabric:
* The dye uptake of the cotton gets increased.
* The tensile strength of the cotton is also increased.
* The lustre of the fabric gets improved in mercerizing.
* The outer wall of the cotton fibre gets dissolved and fibre swelling takes place.
* The internal reorientation of the cellulosic structure also takes place.
* The immature fibres present in the cotton fabric get dissolved in mercerizing.
* The durability of the fabric gets improved.
* The dimensional stability of fabric gets improved in the mercerizing process.
* The dye consumption gets reduced after mercerization.
Mercerization process:
Mercerizing is a textile wet processing process. It is a very important process of the cotton fabric or yarn pre-treatment. This process basically comes after the scouring process but dyer uses a short process sometimes. Mercerization is done after singeing for cost reduction of dyeing.
The impregnation of the cotton in the form of fabric or yarn with a sodium hydroxide solution ( caustic soda solution) at a concentration range of 20-22 % ( 200 to 220 GPL) at a temperature of 20-60 degrees centigrade under a certain tension is called the mercerizing process.
The changes in the cotton properties after mercerizing depend upon the alkali solution concentration, dwell time in alkali solution and process temperature.
The concentration of sodium hydroxide necessary to achieve the fully mercerised effect is 25% by wt solution.
Types of fabric mercerization:
Mercerising may be carried out at various stages of the preparation sequence on one of two main types of mercerising machine given as below:
1. Chain mercerizing machine.
2. Chainless mercerizing machine.
Please click on the below link to know more information:
www.textileadvisor.com/2022/0...
Негізгі бет Mercerization process l Types of mercerizing machines l Common structure and working principle
Пікірлер: 27