Factors to be considered for mercerizing:
These are just some of the goal-setting shareware that you can use.
4. Caustic soda concentration
6. Tensile Strength
7. Staple Length
9. Fabric Structure
Table of Contents
Textile products shrink when exposed to alkali during mercerizing. As a result of this contraction, the crystalline region of the fiber is lost. As a result, alkali can easily enter the product. The examination has shown that maximum compression of yarn is observed when mercerizing at room temperature with 20% (45° Tw) alkali. https://bdfabric.com/fabric-mercerizing-process-in-textile/
Most cotton is mercerized with tension to increase its luster. Different types of tension result in different brightness. Mercerization without tension does not cause any brightness. Even a slight tension will increase some brightness. Maximum brightness can be obtained only if sufficient tension is applied to return the material to its original length. Even if you apply more tension than this, the brightness will not increase.
At low temperatures, the alkali produces a good mercerizing effect. The rate of mercerization decreases as the temperature rises. Therefore mercerizing is best at 17°C at low temperatures. Although mercerizing is found to be good at 7.50C, it is costly to maintain that temperature, so 150C to 20°C is preferred for good mercerization.
4. Caustic soda concentration:
For good mercerizing, the concentration of hydroxide (NaOH) ranges from 45° to 54° Tw (Towadel). Mercerizing will not be good if the concentration of alkali is more or less than this.
The optimal time for mercerizing is 30 seconds to 2 minutes. It is usually sufficient to mercerize bleached cloth in a caustic solution with a concentration of 55° Tw for 30 to 60 seconds. However, when the concentration of the solution is low, the temperature increases but the time of mercerizing increases.
6. Tensile Strength:
When mercerizing cotton yarn or cloth, its strength increases by 10 to 50 percent. This increase usually depends on the concentration, temperature and impregnation condition, and yarn formation of the caustic soda solution. However, as the temperature and caustic soda concentration increase up to a certain limit, the strength also increases. Caustic soda concentrations range from 450 to 54° Tw and temperatures range from 180C to 20°C. However, the formation of yarn plays a significant role in increasing strength.
7. Staple Length:
The longer the fiber, the shorter the yarn. This will result in better mercerizing and also increase the brightness.
Twist influence on Mercerizing is widespread. Alkali cannot easily penetrate the more twisted yarn. As a result, the mercerizing is not good and the brightness is not good. On the other hand, alkali solution can easily penetrate the less twisted yarn so the luminosity is also higher. The twist factor of the yarns to be mercerized is kept between 2.2 and 3.0.
9. Fabric Structure:
If there is more interlacement in the fabric design, then the yarn bonding increases. As a result, the tension given during mercerization is not effective. On the other hand, if the float of the yarn is high, the tension is effective and the brightness increases. That is why the brightness of Satten cloth is more.