AVCO-FIX 200

FIXING AGENT FOR DIRECT DYESTUFFS
AVCOFIX 200 is an after-treatment agent for improving the wet fastness properties of cellulosic yarns and fabrics dyed with direct dyestuffs.SPECIFICATION:

Chemical nature Poly-amino condensation product
Appearance Colourless, slightly viscous liquid.
Solubility Miscible with water at any ratio.
Density 1.19 ± 0.2 gr/cc
Compatibility Good with cationic and nonionic products. Is not compatible with anionic products
Ionicity Cationic
pH (10% sol.) 5.2 ± 0.5
Storage Freezes below 0°C. Fully usable after thawing. Shelf life is at least 12 months.
Stability to:water hardness, alkalis acids, electrolytes
  1. Stable in usual concentrations under normal working conditions
  2. Unstable to very low or very high pH.
  3. Unstable to sulphate or phosphate salt.

PROPERTIES & USES:

  1. AVCOFIX 200 improves the wash fastness and the wet rubbing fastness of cellulosic
    yarns and fabrics dyed with direct dyestuffs.
  2. AVCOFIX 200 improves the fastness to perspiration.
  3. AVCOFIX 200 reduces bleeding of direct dyestuffs from fabrics in wet conditions.
  4. AVCOFIX 200 may cause a slight change of shade of treated textiles.
  5. AVCOFIX 200 is used also for improving the wet fastness of cellulose dyed with
    reactive dyestuffs, mainly with dark shades. Influence on the light-fastness and on
    the shade should be carefully checked before use.

APPLICATION:

AVCOFIX 200 can be applied by exhaustion or by padding. Fabrics should be thoroughly rinsed before application to prevent precipitation with traces of anionic wetting agents and dyeing auxiliaries.
  1. Application by exhaustion (jet, winch, jig)
  • Add fresh water to the bath.
  • Adjust pH to 5.5-6.5 with Acetic Acid.
  • Add AVCOFIX 200 (pre-diluted – 1:3)
  • Treat at 30-40°C for 20 minutes.
  • Drop bath.Dosage should be 1-3% o.w.g., depending on shade.
    AVCOFIX 200 can be applied also together with cationic softeners.

  • Application by padding
    • Prepare the finishing bath with 20-40 gr/l AVCOFIX 200.
    • Pad solution to the fabric and dry.
When application is done wet on wet, adjust concentration to a pick up of 1-3% of AVCOFIX 200 o.w.g., depending on shade.
AVCOFIX 200 can be padded as is or together with cationic softener, nonionic softeners and resins (check for compatibility).STRIPPING

Use the following recipe:

formic acid (85%) 3 cc/l
AVCO-DISPERSANT NS 2 g/l
Treat 30 min. at 80°C
Rinse thoroughly and neutralize..
.