Project Description

Dyeing-Fixing Agent

Formaldehyde Free Fixing Agent

The effective content of formaldehyde free fixing agent TCO72 is up to 72%. It can effectively improve the soaping fastness of various reactive dye fabrics and give the fabric a natural and hydrophilic feel. When nylon is dyed with acid dye, the product must be solidified with an acid fixing agent (ALBACID 370), passed through two clean waters, and then fixed with TCO, which effectively improves the clarity of the soap solution. In Cuilan, Baolan, and Yanlan, the soaping fastness (soap clarity) is significantly better than that of the monomeric fixing fixative.

  • Composition: Aqueous preparation based on olyethylene polyamine
  • Appearance: Low viscosity, light yellow transparent to dark yellow liquid.
  • pH: about 8-9 (5%)
  • Ionicity: cation
  • solubility: soluble in water
  • General stability: acid, alkali and electrolysis encountered in hard water and general fabric processing
  • Highly stable in the solution
  • Compatibility: Can be used with nonionic and cationic materials
  • Ecology/toxicity: Storage, handling, and use are subject to chemical use rules
  • Storage stability: dark 20 ° C can be stored in a closed container for one year
  • Free of formaldehyde and zinc – Less pollution to products and wastewater
  • The fabric treated with this product has few fibers and is rarely stained – even application
  • The fabric treated with this product can be washed with high temperature, and it can be almost fading without adding 1g/L soda ash. – Prevent the dye from moving during the drying process.
  • Very stable to steam – Fix fastness will not be damaged during steaming
  • by micro-color change – good reproducibility
  • Improve dye perspiration fastness – Excellent violent washing, perspiration and hot rubbing, which can significantly improve soaping fastness
  • can be used in conjunction with resin finishing of direct dyes – very good soaping fastness
  • high affinity, low pH dependence – easy to use and reliable
  • high exhaustion rate – less waste water pollution and high efficiency

Formaldehyde free fixing agent fixative TCO-72 can be diluted in all proportions by pouring on cold water. Stock solutions are stable for prolonged periods.

Required amount

The amount of Fixative TCO-72 required depends on type of dye and desired shade depth.

The best effects are obtained by applying Fixative TCO-72 as follows:

★ Batchwise exhaustion

Reactive dyes0.16-1.3%TCO-72
Direct dyes0.7-1.9%TCO-72
20 min at40°CpH 6–7 (adjusted with acetic acid)

To ensure levelness we recommend in principle a minimum amount of 3% on cheese dyeing unit

★ Continuous application
◆ Pad mangle

Reactive dyes7-13 g/lTCO-72
Direct dyes12.7–19 g/lTCO-72

◆ Open-width washing machine

Reactive dyes1.3–3 g/lTCO-72
Temperature About30°CpH 6–7 (adjusted pH with acetic acid)

◆ Aftertreatment of prints

Open-width washer1.3–3g/lTCO-72
20–30 min at30–50°CpH 6–7 (adjusted with acetic acid)

◆ Resin finishing

9.5–19 g/l TCO-72

▲ TCO-72 exhausts on to the fiber at a medium rate and has good leveling power, which can be improved by setting pH at 6-7 and the temperature at no more than 40℃.
To improve the exhaustion rate under high concentration in post-treatment bath, adjust the pH of acetic acid to about 4 and treat for 5-10min. TCO-72 will be almost exhausted under such conditions.

▲ Cationic and nonionic softeners can be applied together with TCO-72. The best softening effects are obtained by a one-bath, two-stage procedure, the softener being applied first, and the goods then treated with TCO-72 in the same bath.

▲The application of TCO-72 in resin finishing usually can significantly reduce the free formaldehyde on the fabric produced.

▲Fastness can reach level 4 if SOLOPHENYL dye is used, and the processing method is exhaustion.

40℃ washing test 1/1 of standard shade depth
50℃ washing test 1/3 of standard shade depth

▲When processed with resin finishing at the same time, TCO-72 can markedly improve wash fastness, especially used for all-cotton fabrics and cotton-polyester blended fabrics.
(can reach level 4 under the conditions of 1/1 standard shade depth and 50℃)

★ To correct faulty dyeing:

If TCO-72 has been applied evenly, simple masking with only a slight stripping action is enough to permit subsequent redyeing or shading.

◆ To add color/ redye

2-3 ml/l formic acid 85% 30 min at 90 ° C
The goods are then thoroughly rinsed and neutralized and treated again with TCO-72.
Procedure for correcting unlevelness

◆ To correct unlevelness

Stage 1: stripping the dyeing
Stage 2: masking the cationic charge on the cellulose
2-3 ml/l formic acid 85% 30 min at 90 ° C
The goods should be then thoroughly rinsed by cold water, dyed and treated with
Corrected faulty dyeings may be left with impaired light fastness as a result of the
masking treatment.

◆ Procedure for stripping of dyes and TCO-72

Removal of TCO-72 before redyeing can guarantee a satisfactory levelness and rubbing
Method 1 (alkaline)
10 ml/l caustic soda 30%
45 min at 85°C (or 20 min at 120°C), then rinse and neutralize
Method 2 (acid)
3 g/l potassium persulphate
45 min at 80°C, then rinse and neutralize
Method 3 (oxidation)
5 ml/l hydrogen peroxide 35 % w/w
2 ml/l caustic soda 30% 30 min at 80°C, then rinse and neutralize

Storage stability: 20 ° C can be stored in a closed container for one year.

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All the information provided is in accordance with the present state of our knowledge. Nonetheless, we disclaim any warranty or liability whatsoever and reserve the right, at any time, to effect technical alterations. The information provided, as well as the product’s fitness for an intended application, should be checked by the buyer in preliminary trials. Contractual terms and conditions always take precedence.

This disclaimer of warranty and liability also applies – particularly in foreign countries – with respect to third parties’ rights.