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Recent Articles
- The Rolling Page 61 24/06/2022
- Checking the finished fabric Pag.60 13/06/2022
- The Airo Treatment Pag.59 06/06/2022
- Brushing Page 58 26/05/2022
- The Mercerization P.57 25/05/2022
- Sodating and Bleaching Pag.56 20/05/2022
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Purpose of processing
Mercerization, in addition to being a preparation process for printing, has the purpose of giving the fabric excellent shine, good dimensional stability and greater resistance and, in the event that the fabric must be dyed, it also allows a saving of dye and obtaining brighter colors.
Mercerization is very important for cotton knitted fabrics that are worked both in open and tubular form.
Processing technology
Mercerization is a treatment that is carried out on the cotton fabric under tension with caustic soda, concentrated at 30° Be (Baumè), at a temperature of 10/15°C. Cotton fabrics mixed with viscose rayon can also be mercerized, for which the most suitable parameters are 13° Be and a bath temperature of approximately 20°C. Due to the high tension that can be exerted on the fabric, the chain machine is the most suitable for carrying out mercerization with a high degree of brilliance, but for greater compactness
and yield, cylinder machines are usually used. However, these are fully automated machines, so the piece, after rinsing, comes out mercerized and ready for subsequent processing. Due to the difficulty of soda penetration, it is necessary to use wetting substances.
For knitted fabrics, given the particular structure of the fabric, the machine is equipped with motorized cylinders which prevent excessive stress on the fabric.
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