AVCO-REZ CT-130

“ZERO FORMALDEHYDE” CROSS LINKING RESIN WITH BUILD-IN CATALYST

AVCO-REZ CT-130 is a “ZERO FORMALDEHYDE” resin with no free formaldehyde and no released formaldehyde, used as a thermosetting resin to produce durable crease resistance and dimensional stability effect on cellulose and polyester cellulose fabrics. It is recommended for the production of fabrics which stands in the demands of the ÖkoTex Standard for fabrics in close contact with human skin and for baby wear.

It contains a build-in catalyst which enables low temperature curing of treated fabrics (130-140°C). The use of AVCO-REZ CT-130 enables processing of fabrics sensitive to high temperatures such as white fabrics, or the one containing fibres sensitive to high temperatures such as polypropylene or acrylics. AVCO-REZ CT-130 enables finishing of fabrics pre-dyed or printed with disperse dyes sensitive to high fixation temperatures.

SPECIFICATIONS:

Appearance Clear, colourless to yellowish liquid.
Chemical nature Aqueous compound of modified imidazolidon derivative with acidic catalyst
Solubility Miscible with water at any proportion.
pH (10% sol.) 2.9 – 3.5
Density (g/cc) 1.13 – 1.17
Free Formaldehyde None
Storage Stable at normal storage conditions for at least 12 months on prolonged storage and low temperatures partial crystalisation may occur. It can be reused after warming and agitating.

PROPERTIES:

1. AVCO-REZ CT-130 is used in applications such as “wash and wear”, “permanent-press”, “shrinkage control” of cellulosic and polyester cellulose fabrics.

2. AVCO-REZ CT-130 imparts zero formaldehyde level on the treated fabrics, meeting ÖkoTex standards including the norm for baby wear. No released formaldehyde on the treated fabrics.

3. AVCO-REZ CT-130 is fully compatible with other thermosetting resins, fluorocarbons, hand builders, softeners, dye fixatives and suitable optical brighteners.

4. The curing is done at low temperature of 130°C in a dry cross-linking process.

5. High speed drying and curing can be applied in order to achieve one step padding and curing.

6. The washing fastness and the drycleaning fastnesses of treated fabric to repeated laundries are excellent.

6. Minimizes the tendency to yellowing when properly cured.

7. Good stability to chlorine in washing treatments.

8. Suitable for white and dyed fabrics, imparts comfortable handle.

9. AVCO-REZ CT-130 can be applied to knitted and to woven fabrics.

10. Tensile strength loss caused by the resin is related to the quantity of product applied. The application of AVCO-REZ CT-130 together with AVCO-SOFT PE. (Polyethylene emulsion) minimizes the loss in the tensile strength.

11. Does not normally cause “garlic odour“ associated with many N.F. finishes when correctly applied.

12. AVCO-REZ CT-130 has been developed to cure at low temperatures. Higher temperatures may lead to risk of fabric odour and strength loss.

APPLICATION:

AVCO-REZ CT-130 is applied by padding method as suggested below. Ensure that the fabric is well prepared with good absorbency, and neutralized correctly. The fixing conditions such as time and temperature, the pH and the amount of the catalyst should be kept exactly according to the recipe recommendations.

Recommended pH of the finishing bath should be 4.5. Curing should be done at 130°C for 1 minute.

1. Padding:

This is done normally at room temperature. Padding baths are prepared by simply diluting the resin with cold water and adding other finishing agents.

Adjust the pick-up to be 80%. The pH of the finishing bath should be adjusted to 4.4 – 4.6.

2. Drying:

After padding the fabric is dried at 120°C to reach 8% moisture or less. The stenter frame is recommended to provide the desired fabric dimensions and to avoid creases, that would be set in the fabric during the curing operation.

3. Curing:

Cure at 130°C for 60 seconds.

There is also the possibility for rapid curing via a single pass process combining one step drying and curing. This is done by drying and curing at 140°C for 60 seconds.

Drying and curing can be applied even faster at 150°C.

4. Washing:

This step is optional though it should be done for optimum results. The first washing is alkaline in order to neutralize the acidity developed by the catalyst. The washing is followed by a final drying done on a stenter frame.