Latest News and Updates on Textile Auxiliaries and Dyes

Overflow dyeing machines have a maximum nominal capacity, and this nominal capacity is not suitable for all fabrics. Therefore, during production, it is necessary to determine the actual capacity of the overflow dyeing machine according to different conditions such as the thickness and width of the fabric. For fabrics of the same width, the lighter and thinner they are, the smaller their capacity is. This is because if light and thin fabrics are fed according to the nominal capacity, the length of the fabric will inevitably be too long, and the cycle during dyeing will be long, which will easily cause the fabric to knot due to disorder in the dyeing room, causing fabric spots. Read More

Speaking of desizing, we have to mention the three major sizing materials in the textile sizing industry: starch and derivatives, polyvinyl alcohol (PVA), and acrylic sizing. PVA has been gradually phased out due to environmental issues, and most of them are now used in combination with starch and acrylic slurry. Four commonly used desizing methods: hot water desizing, alkali desizing, enzyme desizing, and oxidative desizing. Enzyme desizing and alkali desizing are currently used more frequently, and enzyme desizing (amylase) is mainly targeted at starch sizing. The desizing effect is generally evaluated by the desizing level. Among the three major slurries, acrylic slurry is easier to remove, while starch slurry and PVA both have simple and fast test methods (such as iodine/potassium iodide method.) Insufficient desizing will affect the coloring rate of the dye during dyeing, or cause the fabric's feel to deteriorate. Read More

Rungs and bars1. Cause analysisThe nylon fibers in the fabric differ in their chemical or physical characteristics.Physical differences in yarns, including differences in yarn count, the number of fibers in the yarn or the fineness of the fibers, the end curl of a single fiber in the yarn or the dif Read More

Reactive dye, also known as reactive dye, is a new type of water -soluble dye that appeared in the 1950s. Reactive dye molecules contain active groups that can react with amino groups in cellulose and protein fibers in cellulose. Generate covalent bonds and generate "dyes-fiber" compounds. The React Read More

Vat dyes are a popular choice in the textile industry, known for their exceptional color fastness and resistance to fading. This article explores the fascinating world of vat dyes, their unique dyeing process, and their versatility in creating vibrant and long-lasting colors for various textile appl Read More

Introduction:Reactive dyes are a commonly used class of dyes in the textile industry due to their vibrant colors and ability to form a covalent bond with the textile fibers. While these dyes offer excellent color fastness, their application can lead to a phenomenon known as "reactive fragility." Thi Read More

Keywords：Disperse dyeTextile dyesDyeingDisperse dye definitionDisperse dyes are a type of dye with smaller molecules (molecular weight 200-500) and relatively simple structure. It does not contain strong hydrophilic groups such as sulfonic acid group so3- and carboxyl COOH. It only contains some wea Read More

Disperse dyes are a type of dye with smaller molecules (molecular weight 200-500) and relatively simple structure. It does not contain strong hydrophilic groups such as sulfonic acid group so3- and carboxyl COOH. It only contains some weak polar groups such as carboxyl groups, amino groups, and nitro groups, and is a non-ionic dye with very low water activity. Read More

Vat dyes are insoluble in water and cannot be used to dye fabrics directly. When dyeing, it is necessary to use insurance powder in an alkaline solution to reduce the leuco body to a water-soluble leuco body, so that it can be adsorbed by the fiber, and then oxidized and developed by air, etc., to convert the leuco body into the original dye and dye it on the fiber. Read More

Reactive dyes are a type of dye that react chemically with fibers during dyeing. This type of dye molecules contains groups that can chemically react with fibers. During dyeing, the dyes react with the fibers and form a covalent bond between the two to form a whole, which improves the washing and rubbing fastness. Reactive dyes are a new type of dye. In 1956, the UK first produced the Procion brand of reactive dyes. Reactive dye molecules include two main components: parent dye and reactive group. The group that can react with fiber is called reactive group. Read More

In the textile industry, different fabrics are dyed with different dyes. Cotton, one of the most common fabrics, is the best choice for dyeing because of its high water absorbency. The purpose of this article is to introduce the selection and process of cotton dyeing, and to answer questions that are widely used in daily life and in the textile industry. Read More

Dyeing on an overflow machine, heating and cooling will directly affect the shrinkage of the fiber, resulting in a fold. For thermoplastic fibers such as nylon, once the fold is formed, it will be irreversible. Therefore, when dyeing, special attention should be paid to the need to slowly raise/lowe Read More