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Flow Chart of Yarn Mercerizing Process

Flow Chart of Yarn Mercerizing Process
Rana Sohel
Executive Engineer
Sunman Textile Mills Ltd. Chittagong
Cell: +8801912-420118
Email: rsohel07tex@gmail.com




Mercerization:
Mercerization is a finishing treatment of cotton with a strong caustic alkaline solution in order to improve the luster, increase affinity for dyes. John mercer 1st use this system, so this process is called mercerization. It is done in a concentrated solution of caustic soda (300 g/l), under tension and ambient temperature.
Yarn mercerizing
Yarn mercerizing
Flow Chart of Yarn Mercerizing:

Yarn

Singeing

Reeling (Hank making)

Mercerizing

Bleaching

Dyeing

Hydroextraction

Drying

Hank yarn

Hank to cone


If we specify only mercerizing process then we can arrange the process in the following way:

Feed the hank

Caustic impregnation for 3 min 45 sec (With no stretch)

Hot wash at 80ºC for 60 sec (With stretch)

Hot wash at 60ºC for 45 sec (With stretch)

Cold wash for 60 sec (With stretch)

Pull up