AVCO-TAN PES

THICKENER FOR DISPERSE DYES PRINTING
AVCOTAN PES is a synthetic thickener developed for the convenience production,
handling and use of disperse printing pastes. The product has all the advantges of synthetic thickeners with lower sensitivity towards electrolytes.

SPECIFICATION:

Appearance White powder.
Chemical nature Synthetic copolymer modified with a substituted natural- thickener and solubilizers.
Compatibility
  1. Can be used together with all chemicals and dyestuff normally encountered in printing disperse dyes. Is not compatible with strong alkalis, acids, metallic ions, cationics and concentrated electrolytes.
  2. Can be used with hard water together with a suitable complexing agent.
Ionicity Anionic
pH (1% dispersion) 6.5 – 7.0
Solubility Dispersible in water, in concentration up to 2-4%, forms viscous paste.
Storage stability Stable for 12 months at least, when stored in a dry place in close container. Do not store in direct sun.

PROPERTIES & USES:

  1. Outstanding coverage and levelness, sharp definition of prints.Excllent results
    when printing delicate and fine fabrics.
  2. Increased color yield with good reproducibility.
  3. Produces smooth paste during short mixing time.
  4. Printing paste viscosity is stable for long storage time.
  5. Good wash-off properties.
  6. Does not react with disperse dyestuffs.
  7. Produces thixotropic printing paste which enables to control flow properties of the paste.
  8. Does not bleed out of rotary screens during machine stops.
  9. Does not clog printing screens.
  10. Very easy to adjust viscosity, no need for prolonged swelling time.

APPLICATION:

  1. When preparing the stock printing paste, all the chemicals should be added to the water and allowed to dissolve prior to adding the AVCOTAN PES. The thickener should be added while mixing, It will easily disperse and fully hydrate in some minutes.
  2. Stock paste formulation for disperse dyes
    Water 960 – 980
    AVCOTAN PES 40 – 20
    1000
  3. Printing paste preparation:
    Pre-diluted dyestuffs should be added to the stock paste while stirring. If needed, in very high dye concentration, viscosity adjustment is done easily by adding thickener during high speed mixing.
  4. Fixation
    Fixation should be done in the normal procedure required by the type of fixation machine and dyestuffs used.
    Fixation of disperse dyes:
    1. pressurized steam at 0.5-2 atm. for 20-30 min.
    2. HT steam at 165-180°C for 6-8 min.
    3. Thermosol at 205-210°C for 60-90 seconds.
  5. Washing off
    Washing off should be done with soft water, or with tap water with the addition of complexing agents. Temperature, type of washing aids and procedures depends on machinery and type of dyestuffs. (For more details refer to the technical bulletins of AVCOL-PET).
  6. To improve definition of the print borders with problematic designs, addition of AVCOPRINT JN (special antimigrant) is very beneficial. Use of 6-10 g/Kg will result in sharp and clear borders of the printed area.
  7. To improve penetration into the fabric add 3-6 g/kg AVCOTEX MP.