AVCO-STABILIZER HP

PEROXIDE STABILIZER FOR HIGH LIQUOR RATIO BLEACHING
AVCO-STABILIZER HP serves as a stabilizer for Hydrogen-Peroxide in alkaline bleaching of cellulose in high liquor ratio machines.
AVCO-STABILIZER HP 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 HP also acts as a sequestering agent on heavy metal ions, which can produce catalytic decomposition of Hydrogen-Peroxide, and would cause fiber damages.
AVCO-STABILIZER HP does not contain any silicate compounds, and there is no risk of precipitations during bleaching onto fabrics or machine walls.

SPECIFICATION:

Appearance Slightly yellowish clear liquid
Chemical nature Aqueous solution of polyhydroxy and poly carboxy compounds.
Ionicity Anionic.
pH (10%) 8 ± 1
Solubility Miscible with cold water at any ratio.
Storage stability Stable for at least 12 months.
Density at 20°C 1.13 ± 0.03

APPLICATION:

Depending on the method applied, use 10-30% of AVCO-STABILIZER HP calculated on the amount of Hydrogen Peroxide (35%) used.
AVCO-STABILIZER HP and other auxiliaries are added in a in the following order:
a. Add wetting agent / detergent
b. Add AVCO-STABILIZER HP
c. Add alkali.
d. Add Hydrogen Peroxide.
e. Add optical brightener when necessary.
Following are some bleaching formulations:
  1. Pre-bleach in Jig(L.R. 1:3 – 1:5) of desized cotton and polyester cotton fabrics
    AVCO-BIOLUZE GSB 1.0 – 2.0 g/l
    AVCO-STABILIZER HP 0.5 – 1.5 g/l
    Caustic Soda (100%) 0.5 – 2.5 g/l
    Hydrogen Peroxide (35%)3.0 – 10.0 cc/l
    Bleach at 90 – 95°C for 1 – 1 1/2 hrs.

  2. Full bleach in jets (L.R. 1:6 – 1:10) of cotton and polyester-cotton knits.
    AVCO-LEVOLUZE GLF 0.5 – 1.5 g/l
    AVCO-STABILIZER HP 0.5 – 1.0 g/l
    Caustic Soda (100%) 0.8 – 1.5 g/l
    Hydrogen peroxide (35%) 3.0 – 10.0 cc/l
    AVCOLUX CBA-100 X %
    Bleach at 90 – 95°C for 30 – 60 min.

  3. Pre-bleaching of cotton garments in a paddle machine (L.R. 1:15-1:20)
    AVCO- BIOLIT NFB 0.5 – 1 g/l
    AVCO-STABILIZER HP0.5 – 1 g/l
    Caustic Soda (100%) 0.5 – 1 g/l
    Hydrogen peroxide (35%) 3.0 – 10.0 cc/l
    Bleach at 90°C for 1 – 1 1/2 hrs.

  4. Rayon fabric or rayon staple pre-bleaching (L.R. 1:10).

    AVCO-BIOPAL LFB 0.5 – 1.5 g/l
    AVCO-STABILIZER HP0.5 – 1.0 g/l
    Caustic Soda (100%) 0.4 – 0.6g/l
    Hydrogen Peroxide (35%) 1.0 – 1.5 cc/l

    Bleach at 70 – 80°C for 45-60 min