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How to improve the wet friction for reactive dyes

Views: 1     Author: Site Editor     Publish Time: 2023-02-24      Origin: Site

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1. Select reactive dyes with less floating color after dyeing

Floating color is the main reason for the unqualified damp friction of dark color fabrics.

Active dye -dye dyes include dyes that have been adsorbed on the fiber without reaction to the fiber, partial hydrolyzed dyes, and ethylene cymbal dyes that have eliminated sulfate. The total amount of floating color dyes can be represented by the final dyeing rate E and the final color fixation rate F in the active dye dyeing feature value. The E-F value is represented.

Therefore, the reactive dye with a small amount of floating color after dyeing, that is, a low E-F-value dye in order to clear the floating color. If the color solid rate is very high, the dye is fixed with the fiber, and the floating color can be greatly reduced.

 

2. Choose reactive dyes that improve high strength

The concentration of dyes used in dark color staining is high, and the amount of floating color dye increases. The fiber has a saturated value of the dye. Generally, the concentration of the dye should not exceed 10%of the dye saturation value. Excessive dyes cannot be dyed and fixed. It will accumulate on the surface of the fabric, which will affect the wet rubbing of the dye.

Dye dye must use active dyes with high enhancement.

In recent years, multi-active base-active dyes developed, such as the enhancement force of Cibacron's dark red S-B is 3 times the general red active dye (such as CI activity red 239,195); other tri-active basic dyes such as Cibacron C-2G (CI active red red 228) There are two ethylene phenea and one pinerine, and the CIBACRON red FN-3G (CI activity red 266) has one average chlorine triazin, one fluorine triazine, and ethylene pheneus, and the Remazol RED BS There are two ethylene radonia and one pine -chlorine. They all have excellent high suction rates, high solid color and high improvement, and their hydrolyzed dyes are easy to remove.

 

3. Reasonable dyeing and finishing process

In addition to the correct selection of dyes, a reasonable dyeing process can also increase wet frictionality. The smoother the surface of the fabric, the higher the wet rubbing solidarity, so the hair should be cleaned, and the color fiber particles should be reduced. The hair effect of the semi -finished product directly affects the permeability during dye dyeing. The better the permeability, the better the dye dyeing to the fiber in the fiber, which is good for reducing the accumulation of dyes on the surface of the fabric. Adding an osmotic agent and silk light treatment are conducive to improving the wet frictionality.

The degree of washing of float dyes is related to the directability of their fiber. The most direct ethylene cymbal dye is the most difficult to wash, followed by hydrolyzed dyes.

The unacceptable β-sulfate ethylene dye dye is the least direct to the most direct-to-remove dye due to the presence of sulfate water-soluble group. Washing and soap can be removed to remove floating colors and electrolytes and alkali agents. The auxiliary of soap washing must have good penetration ability, easy to afford to dyes, and form a beam to reduce the affinity of dyes and fibers, forming a kernel dye beam stably scattered in the water. You can choose a additive with anionic and non -ion -type surfactants with penetration and decentralization functions.

Water quality is a very important factor. If the water quality is high, the water -soluble group of floating dyes will form the color cream that is difficult to dissolve in water, which will seriously affect the removal of floating dyes. The drying method is also very important. The amount of contact molecular metastasis of contact -type drying is higher than that of non -contact drying.

 

4. Control of dye fabric cloth surface pH value

The active dye dark color fabric dyeing process is high in the amount of alkali, and water washing must be strengthened. The pH value of the dye fabric fabric should be controlled at 6.5-7.5 (the technical standard of the OEKO-TEX standard 100 is PH value 4.0-7.5 and 4.0-9.0) to prevent the alkaline medium from broken down the ether bond between the ethylene cymbal and the fiber and the fiber fade.

 

5. Small surface of dye fabric surface

The worse the surface of the dye fabric, the greater the friction coefficient between the white cloth with the test, and the effective contact surface increases. Therefore, the wet rubbing fastness decreases. The Eco-Label stipulates that the wet frictionality is at least 2 ~ 3, but the thick oblite denim is allowed to be level 2, because the sloping cloth is larger than the friction coefficient of the plain cloth.

 

6. Powerful damage of fabrics

At the same time, many post -tidal agents will damage the strength of the fabric while improving the function. Wet frictionality decreases.

 

7. Special color fixing agent

The dedicated fixing agent can increase the wet rubbing fastness of the dark color dye dyeing cloth by 0.5-1.0. The requirements are as follows:

(1) Polymerized compounds that can form a film generally have polyurethane or organic silicon with functional groups (-OH, -NH2), and cross-linking agents and polymer polymers are counted to make them durability and quickly becoming fast. Meeting.

(2) No color change, not yellowing, no reduction of sun exposure.

(3) It can reduce the fabric friction coefficient and improve the feel of fabric.

(4) Still the use of cotton fabrics to breathe and humidity.


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