introduction

What are the advantages of VAT dyes? Compared with other dyes, VAT dyes have a series of remarkable characteristics. Because of these characteristics, it is often used to solve certain fastness problems. Let's take a look!

1. The color of VAT dyes is mostly intermediate colors

The color of VAT dyes has the characteristics of a complete series from yellow to black and from bright colors to general colors, and its biggest characteristic is the majority of intermediate colors, which are basically a single component and have good dyeing reproducibility, especially the green, olive green, flesh color, brown and gray series.

For example, green reactive dyes are generally made of yellow and emerald blue reactive dyes, in order to combine reactive dyes with different dyeing properties, the control of dyeing is very important, and there are several green varieties of single structure in VAT dyes, which can not only meet different needs, but also have excellent dyeing reproducibility compared with reactive dyes.

2, with excellent light fastness and light fastness based on a variety of composite fastness

At present, the requirements for various composite fastness based on light fastness, such as sweat - sunlight fastness, sweat - sunlight - washing fastness, sweat - sunlight - friction fastness, etc. are getting higher and higher on cotton fabrics, especially light color. VAT dyes have special properties in this respect compared with other types of cotton dyes. Therefore, it is very suitable for work clothes, summer clothes, sportswear, overcoats, curtains, furniture covers and other dyeing and printing.

3, with excellent chlorine resistance and wet fastness

VAT dyes have excellent chlorine fastness compared to reactive dyes, whether it is chlorinated water (20ppm) or chlorine. Fastness of (500ppm); In addition, the VAT dye has excellent washing fastness, etc., so the VAT dye is suitable for chlorine disinfection and washing resistance requirements of high occasions, such as hotels and hospitals for fabrics, bedding, covers, sheets, clothes, etc., printing and dyeing, especially for products requiring multiple washing treatment, the use of VAT dye is more obvious. In addition, VAT dyes are also suitable for the dyeing and printing of textiles requiring the highest wet fastness, such as ground dyeing with reactive dyes and non-pull-out printing with VAT dyes.

In the United States and Europe and other countries and regions in order to reduce washing water, the use of strong detergent that tetraacetyl ethylenediamine (TAED) added to the peroxide made of new detergent or in the washing water to use a large amount of detergent and warm water washing, VAT dyes also have enough fastness.

4. It has excellent stability for finishing and processing of printing and dyeing fabrics

VAT dyes have very little change to the general resin finishing, and the functional processing that has been developed in recent years to change the physical properties of the fiber, such as shape memory processing, form stability processing, deodorant processing, antibacterial processing, etc., VAT dyes have good stability, and the VAT dyes have more stable time changes than the reactive dyes.

5, suitable for blended fabric one bath with the same color dyeing

The one-bath same-color dyeing of polyester/cotton, brocade/cotton, vinylon/cotton and other blended fabrics is more and more popular in the printing and dyeing industry. VAT dyes have the characteristics of same-color dyeing, which is suitable for continuous dyeing, printing and immersion same-color dyeing of these blended fabrics in one bath. These dyed fabrics can be used to manufacture student clothes, various uniforms, permeable coats and special textiles. Especially military uniforms and combat clothing (such as camouflage clothing), but also has excellent various fastness and infrared resistance and other special properties.

6, with excellent resistance to reduction

This property of VAT dyes can be used in the manufacture of advanced textiles with reactive dye ground dyeing and VAT dye anti-pull-out printing, ground less dyeing of polyester/cotton knitwear (with flow dyeing machine), pre-dyeing process of polyester/cotton blend fabrics (bobbing dyeing) and high fastness printing of polyester/cotton blend fabrics (URS method).

7, can be dyed into a natural tone, extremely clear color

Fabrics dyed with VAT dyes can show natural plant tones and European style characteristics on the basis of coarse tones, such as dyeing cloth dyed with indigo and direct printing with VAT dyes for various washing treatments (stone washing, bleaching, etc.), can be made into textiles with extremely clear and natural plant tones.

In summary, compared with other cotton dyes, VAT dyes have a series of remarkable characteristics, especially reflected in the fastness properties, so at present, VAT dyes are still a kind of cotton dyes worthy of attention.