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5 pretreatment methods for dyeing fabric to obtain dark color

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5 pretreatment methods for dyeing fabric to obtain dark color

Release date:2017-01-13 Author:科润生物 Click:

1 to strengthen the complex fabric of the decontamination processing except

The pretreatment is sufficient, the wettability of the fabric is good, the capillary effect is large, and the diffusion ability of the dye molecule to the dye is increased, thereby improving the dyeing rate. So to strengthen the miscellaneous, decontamination processing except the dyed fabric, can achieve this purpose.

2 mercerized cotton fabric

Organzine cotton fabric after treatment of light, the dye adsorption capacity increased significantly, compared to the untreated mercerized cotton fabric, more can be achieved in the dark effect, and improve the surface gloss.

3 alkali treatment of polyester fabric

Polyester macromolecular high crystallinity and fiber structure, refractive index and surface reflectivity are high, the fiber surface is smooth, the light in the mirror, with disperse dyes dyed black, because there are a lot of reflected light from the surface of the fabric with white light into the line of sight of people, so the black color is difficult to obtain. After alkali treatment, the original polyester smooth surface become rough surface, forming a concave convex irregular reflection layer, that is we often say that the etching effect, and have a certain dark effect, and the reduction of fabric activity increased degrees of freedom of dye increased.

4 Application of low temperature plasma technology

Plasma technology is a kind of method to deal with the surface of fabric. For example, the plasma treated polyester fiber by graft polymerization, forming a thin film with low refractive index on the surface of the fiber, can significantly improve the dyeing rate and color depth; and as for the difficult dyeing of flax fabric by plasma treatment, the fabric capillary effect is 1~1.5 times of untreated, the dye adsorption greatly increase, easy dyeing deep color, dark effect.

5 ultrasonic treatment

Ultrasound is the human ear can not be aware of the vibration wave, the normal frequency of 104~109Hz in the sound wave called ultrasound, and the frequency is greater than 109Hz, known as ultra sonic or microwave ultrasound. The fabric before dyeing by ultrasonic treatment technology, has a certain degree of loose fiber, the fiber internal surface area increase, thus increasing the adsorption amount of dye fiber, improve the fabric dyeing rate, can be achieved in the dark effect. The results show that this technology has obvious effect on the wool fabric with the scale layer and the compact structure of the linen fabric.


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