Carbonisation

carbonization of wool

1. Carbonization Subject- Fabric and Garment Finishing Presented by- Arpan Mahato B/AP/12/1643

2. Vegetable Matter

3. Fine Wool

4. Medium Wool

5. 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 carbonisation

6. 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

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

8. The traditional system

9. Carbosol system

10. Acidising. Moisture removal. Drying/Baking . Burr crushing and dedusting. Neutralization New Technologies

11. 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 .

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

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