AVCO-BINDER FDN

BINDER FOR TEXTILE PRINTING
AVCO-BINDER FDN is self cross linking, very soft binder for printing all kinds of textiles
with aqueous pigment dispersions.

SPECIFICATION:

Appearance White, free flowing liquid
Chemical nature Acrylic copolymer dispersion in water.
Compatibility Can be mixed with nonionic and anionic auxiliaries and pigments normally used in textile printing.
Density 1.01 ± 1.02 g/cc (25°C)
Ionic nature Anionic
Mechanical stability Good
pH 4.5 – 6.5
Resistance to Electrolytes Good
Solubility Dispersible in water at any ratio.
Solubility Dispersible in water at any ratio.
Storage Product should be stored in closed containers and protected against frost. When properly stored shelf life is at least 12 monthes.

FILM PROPERTIES:

  1. Appearance – colorless, transparent.
  2. Handle – very soft, very flexible.
  3. Cross-linkability – can be cross linked at temperature range of 140°C – 180°
    C.
    The reaction is accelerated with acid catalysts. Additional cross linkage is
    obtained by use of cross linking agent such as AVCO-PRINTFIX.
  4. Resistance to solvents – almost insoluble in conventional solvents used in dry
    cleaning.
  5. Wash and rubbing fastness – properly cured binder stands repeated laundry cycles,
    dry cleaning, dry and wet – crocking as occurred in normal handling of printed
    textiles. Fastness properties depend on type of substrate, binder/pigments ratio,
    curing conditions, other ingredients of printing paste, and processes and
    auxiliaries used in fabric finishing. Fastness properties should be checked on
    each material before printing in bulk.
  6. Light fastness – very good

PROPERTIES & USES:

  1. AVCO-BINDER FDN can be used as a binder for organic and inorganic pigments
    dispersions on all kinds of textile fabric.
  2. AVCO-BINDER FDN is suitable for pigment resist printing under reactive dyestuffs.
  3. AVCO-BINDER FDN is suitable for discharge printing with pigments onto reactive
    dyestuff grounds.
  4. Product does not clog printing screens even at high printing speeds, high
    squeegee pressure and very fine screens.
  5. Prints produced with AVCO-BINDER FDN have a very soft handle and there is no need
    to mix it with butadiene binders.
  6. Binder film has a good light fastness.
  7. Excellent stability to mechanical stress and shear produced while preparing and
    transferring the printing paste.
  8. Can be used in all aqueous or oil in water printing pastes with all types of
    anionic or nonionic thickeners (poly-acrylic acids, guar derivatives).
  9. When added to ready made paste, the influence of AVCO-BINDER FDN on the viscosity
    is insignificant.
  10. Does not contain any solvents and other hazardous ingredients.

APPLICATION:

A. Printing paste preparation:
The following is a typical formulation:
Gr/ kg Remarks
WATER adjust to 1000 Use soft water.
AVCO-ANTIFOAM PR 0-3 Important when printing large area.
AVCO-CLEAR NP 18-24 Adjust to needed viscosity.
AVCOPRINT JN 0-10 Co-thickener to prevent bleeding.
AVCO-BINDER FDN 60-180 Usage depends on quantity of pigment.
AVCO-PRINTOSIL EM 0-10 Softener.
AVCO-PRINTFIX L 0-5 Cross-linking agent.
AVCOLOR PIGMENT 0-50 Depends on required shade.

The thickener and antifoam (if needed) are added to the water and homogenized with a high speed (1500-3000 r.p.m) homo-mixer for 5-10 minutes.
It is preferable to add the binder in portions and lower the mixer speed. Preparation order should be as is shown in the recipe above.

B. Fixation:
After printing and drying the printed fabric should be cured at elevated temperature for the proper time as shown in the following table:
Temperature (° C) Fixation Time (minutes)
140 4-6
150 3-5
160 2-3
170 1.5-2
180 1-1.5
REMARKS:
  1. Viscosity of the paste can be adjusted by increasing amount of AVCO-CLEAR NP.If viscosity is too high it can be corrected by adding small amount of electrolyte(Di ammonium-phosphate or ammonium sulphate).
  2. Use of AVCO-PRINTOSIL PR in printing formulation improves handle and increases dry-crock fastness.
  3. Use of AVCO-PRINTFIX L improves wash fastness and wet crock fastness mainly while printing on synthetics or blends.
  4. Use of 4-10 gr/kg of AVCO-PRINT JN can overcome bleeding problems in printing. It improves the uniformity and appearance of big printed areas and enhances production of brighter and deeper colors.
  5. Use of 1-3 gr/kg AVCO-ANTIFOAM PR can solve problems of foam while printing paste preparation and processing.
  6. If printing paste has to be stored for prolonged time add 1-2 gr/l preservative such as AVCOGARD-PR.
  7. While using hard water it is advisable to add sequestering agent such as AVCO-POLYQUEST KAL (Do not use E.D.T.A types).
  8. If there is a problem of screen clogging, add 5-10 gr/kg AVCOPAL LUB.
  9. After fixation there is no need for any further treatment. If customer demands additional finish check influence on fastness properties.