Latest News and Updates on Textile Auxiliaries and Dyes

The dyeing conditions of disperse dyes are usually to dye polyester under high temperature (130℃±5℃) and acid (pH=4~5). There are two main reasons:Polyester has poor stability under alkaline conditions, and alkaline hydrolysis may occur on the surface of the fiber, resulting in a rough surface of th

Photochemical fundamentals of dye fadingThe effect of light on dyes during sun exposure can be explained in two ways.First of all, as far as the structure of the dye is concerned, under the action of ultraviolet light, the chemical bonds in the dye are changed or even broken, so that the structure o

The spandex cloth will turn yellow and the head will be big! Spandex is a commonly used fiber variety in our life. The most prominent feature is good elasticity, and it has the advantages of low fineness, large elastic modulus (elongation at break can reach 400%-800%) and small proportion. Spandex i

From the perspective of the molecular composition of polyester, it is composed of short aliphatic hydrocarbon chains, ester groups, benzene rings, and terminal alcohol hydroxyl groups. In addition to the existence of two terminal alcohol hydroxyl groups, there are no other polar groups in the polyes

Since April last year, the price of international cotton futures has doubled, and cotton futures in New York once rose to about 158 cents per pound, constantly refreshing new highs since May 2011.Relatively speaking, the domestic cotton spot price is relatively stable as a whole, but it is also faci

Designing the warp and weft density of the fabric should also be combined with the use of the fabric. For example, the characteristics of silk fabrics are light, thin and transparent. In order to maintain this feature, in addition to the use of finer warp and weft threads, the warp and weft density

Nylon/cotton fabrics are dyed with light color, and their nylon components are usually dyed with disperse dyes. The reason is: disperse dyes do not contain water-soluble groups, do not ionize in water, and do not carry active groups. Therefore, disperse dyes dye nylon, there is no ionic bond and cov

The theory holds that the selective absorption of different light by a substance will present various colors, and the color of the substance is the complementary color of the light wave it absorbs. The same is true of dyes. The color of dyes is also the complementary color of the color of the light

For fibers that are easy to dye such as cotton fabrics, the main process conditions are reasonable, and the dyes are selected correctly. Generally, there are no technical problems in dyeing dark colors. However, some polyester and nylon fabrics with relatively high requirements are generally difficu

1. Reactive dye mass fractionThe polyester-cotton fabrics were dyed with disperse golden yellow/reactive yellow, disperse blue/reactive blue and disperse red/reactive red respectively. Disperse dye 1% (omf), NaCl 30g/L, 130℃ for 40min, the effect of neutral fixation reactive dye mass fraction on K/S

1.1 Fixed-length titer unitDenier (D): Refers to the weight in grams of a 9000-meter-long fiber or yarn at a given moisture regain. For example: 1500D polyester raw silk means that the raw silk is measured 9000 meters, and its weight is 1500 grams. Others follow and so on.Special number (tex): also

1) Twisting length of the bobbin: the length of the fiber or yarn wound on the bobbin after twisting. 2) Wool: The cord is fluffed due to yarn abrasion or raw silk. 3) Oil stained yarn: Yarn contaminated by oil. 4) Wrong denier silk: The same kind of raw silk in production, different deniers are not