The document discusses the carbonization process used to remove vegetable matter from wool. It describes the traditional processing stages which include scouring, acid treatment, drying, baking to carbonize the vegetable matter, crushing the matter, and removing it. It also discusses the advantages of ensuring clean fibers while maintaining length and increasing yield, as well as the disadvantage of fiber breakage. Newer carbonization technologies aim to control the process more precisely.

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

3. Impurities
Natural Acquired
Oil Fat Sand Pollen

5. Vegetable Matter
VM
Discounts
Medium
Fine Wool
Wool

8.  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.

9.  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

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

11. The traditional
system
Fabric
carbonizing
Carbosol
system

12. The traditional system
5-7.5%
6-8% 5-65%

13. Carbosol system

14. Control the carbonization process Very
important
why ?

15. Acidising.
Moisture removal.
 Drying/Baking .
Burr crushing and dedusting.
 Neutralization

16.  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.

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