AVCO-STABILIZER CPB is a silicate free, liquid stabilizer suited for cotton and polyester-cotton cold peroxide bleach or for cold bleaching/desizing operation.
AVCO-STABILIZER CPB regulates and controls activation of Hydrogen-Peroxide so that usage of active Oxygen is directed mainly for the cellulose bleaching process and not to unwanted side reactions.
AVCO-STABILIZER CPB also acts as a sequestering agent to heavy metal ions, which can produce catalytic decomposition of Hydrogen-Peroxide, and would cause fiber damages.
AVCO-STABILIZER CPB does not contain any silicate compounds, and there is no risk of precipitations during bleaching onto fabrics or machine walls.
SPECIFICATION:
| Appearance |
Slightly yellowish liquid. |
| Chemical nature |
Aqueous solution of polyhydroxy and polycarboxy compounds. |
| Compatibility |
Can be mixed with usual components used in cold pad bleach. |
| Density |
1.11 – 1.14 gr/cc. |
| Density at 20°C |
1.17 ± 0.25 gr/cm. |
| Ionic nature |
Anionic |
| pH as supplied |
8.5 ± 1 |
| Solubility |
Soluble in water at any proportion. |
| Storage |
Freezes below O°C. Fully usable after thawing. When properly stored, storage stability is at least12 monthes. |
PROPERTIES & USES:
- Contains no silicates.
- The treated material is very easily rinsed off with no deposits on textile or
machinery parts.
- Promotes removal of sizes and impurities out of the treated fabric.
- Product is non-foaming.
- Product can be dosed easily as is by a metering pump.
- Can be used also as a stabilizer for hot bleaching.
APPLICATION:
Bleaching bath preparation:
Add the required amount of water to the mixing tank and add all components in the following order:
-
-
-
-
Wetting agent, detergent, dispersing agent.
Guiding recipe
Cold oxidative de-sizing and bleaching of grey goods without pretreatment.
AVCO-STABILIZER CPB 8 – 12 g/l
Caustic Soda (100%) 15 – 35 g/l
Hydrogen Peroxide (35%) 40 – 60 g/l
AVCO-BIOLIT 2090 3 – 6 g/l
AVCOBLANK ROA-CONC 1 – 3 g/l
AVCOSON OX 4 – 6 g/l
Bath temperature : 20 – 30°C
Dwelling time : 16 – 24 hours wrapped with a plastic cover in a rolling station.
Goods which were pre-desized can be bleached in this way by reducing the amount of caustic soda and no AVCOSON OX is needed.
Washing off is done on a continuous washer (minimum 5 boxes)
by the following procedure:
Box 1 (95°C) – Set up with 1 cc/l caustic soda (45 Be).
Box 2 (95°C) -Hot water.
Box 3 (95°C) -Dispense with (1 gr/kg running fabric) AVCO-POLYQUEST PDK
Box 4 (95°C) – Hot water.
Box 5 (60°C) -Warm water.
Counter current is necessary and addition of fresh hot water to box 3 and 5 is recommended all through the washing off stage.
Following is a helpful table for transformation of different caustic soda solution strength at 15°C :
|
Be
|
Sp.Gr.
|
Gr NaOH 100% per kg
|
gr NaOH 100% / Liter
|
|
22
|
1.180
|
160
|
188.8
|
|
30
|
1.263
|
235
|
296.8
|
|
36
|
1.332
|
300
|
399.6
|
|
38
|
1.357
|
325
|
441.0
|
|
45
|
1.453
|
420
|
610.9
|
|
50
|
1.500
|
501
|
766.5
|
Data of Hydrogen-Peroxide:
|
% w/w
|
|
Density (gr/cc -20°C)
|
H202 gr/l
|
|
30
|
|
1.111
|
333
|
|
35
|
|
1.131
|
396
|
|
50
|
|
1.195
|
599
|
|
