Wool carbonization

1. Wool Carbonization Presented by : Mohamed Abd El_Zaher Abd El- Samed Ibrahim Supervised by Eng: Rania El- deeb Eng: Sherien Mohamed

2. Main topics Impurities. Scouring . Vegetable Matter . Carbonization . Techniques. New Technologies. Advantages & Disadvantages .

3. Wool Scouring It is the process of washing wool in hot water and detergent to remove the non-wool contaminants and then drying it

4. Vegetable Matter

5. Fine Wool

6. Medium Wool

7. The object of the carbonization process is the removal of vegetable matter from wool. Processing Stages Scouring of the raw wool with non-ionic detergent. Rinsing. Immersion in a long bowl containing 5-7 % (w/v ) sulphuric acid, 1-2 g/L detergent at 20-30C. Wool Carbonization

8. Double squeezing and/or continuous centrifuging prior to drying. Drying at 60-80C to a low regain. Baking at 95-120C to carbonize the VM Pass through heavy fluted rollers to crush the embrittled VM Convey to a rotating shaker/de-duster to remove the charred VM dust Pass through a neutralizing bowl usually containing sodium carbonate

9. Rinsing with a small addition of detergent. Bleaching with hydrogen peroxide at approximately pH 5 with formic acid. Final drying

10. The traditional system

11. Carbosol system

12. Control the carbonization process Very important why ?

13. NEW Technologies Acidising. Moisture removal. Drying/Baking . Burr crushing and dedusting. Neutralization

14. Advantages Ensures full cleaning of fibers from impurities The fiber length isn’t changed The wool production as compared with the mechanical method is increased by 1-1.3%. The quality of yarn and fabric improved. wool carbonization is more effective than burr picking in burr pickers .

15. Disadvantages The harsh process described cause considerable fiber breakage and loss rendering any long wools used, suitable for the woolen system only .

16. THANK YOU