How to bleach jute rug:
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Jute is not usually bleached in textile factories. Bleaching is never needed to make hessian yarn, seeking yarn, carpet yarn, etc., or to make cloth by yarn, etc. However, sometimes jute is bleached to make a furnishing cloth or ornamented cloth.
It is difficult to do full bleaching of jute. Because in full bleaching, the weight of jute is reduced by 20% to 30%, and the energy is also reduced. To bleach jute well, bleaching is done first with sodium chlorite and then with hydrogen peroxide.
How to bleach jute-Recipe:
Sodium Chloride (60%)→ 1.5 – 3%
Sodium dihydrogen sulphate →0.25 – 0.5%
Wetting Agent → 0.10 – 0.25%
Formic acid →as needed to maintain pH 3.8 to 4.2
Time (cold condition) → 20-30 minutes
How to bleach jute rug-Bleaching process:
The solution is made by mixing the above ingredients with water. The cloth or yarn is inserted into the solution and circulated in cold condition for 20 to 30 minutes. Then raise the temperature of the solution for circulating from 82°C to 88°C for 1 to 1.5 hours.
The product is then bleached for another 2 to 3 hours. Necessary formic acid is added to keep the pH of the solution from 3.8 to 4.2. After the bleaching is done with sodium chlorite in the Kier, the cloth is removed from the Kier and roped in a washing machine in the form of a rope.
Hydrogen peroxide (35%) → 0.6 – 1.4 (percentage of fabric weight)
Magnesium Sulphate → 0.1% (percentage of fabric weight)
Soda ash → 0.5% (percentage of fabric weight)
Sodium silicate 78° (Towadel) → 3% (percentage of fabric weight)
Sodium hydroxide→0.25% (percentage of fabric weight)
Time → 2 to 3 hours (percentage of fabric weight)
Temperature→ 71°C to 82°C (percentage of fabric weight)
The product is kept in Kier with the mentioned recipe. The solution is circulated at a temperature of 71°C to 82°C for 20 to 30 minutes. Again it is circulated for another 2 to 3 hours. At the end of bleaching, the fabric is first washed twice by hot water and then twice by cold water. The cloth is treated with 1% hydrochloric acid and then washed with water.