The color fastness of ribbon is an important evaluation index of printing and dyeing textiles, but the evaluation index of color fastness of textiles is different when different kinds of dyes are used, and the difference of color fastness evaluation index can reach one and a half levels due to different kinds of dyes used. The washing fastness (staining of white cloth) of cotton fabric dyed with ribbon is 4-5 grades with vat dyes, but 3 grades with vulcanized, Nafto and reactive dyes. This is because the molecular structure and chemical properties of various ribbon dyes are different, and their binding modes and binding forces to different textiles are also different. Some ribbon dyes react with textile fiber molecules and are bound to textiles by chemical bonds, while others are fixed to textiles by physical reactions.
Ribbons are classified according to the process, which are mainly woven belts and knitted belts. Ribbon, especially jacquard ribbon, is a little similar to cloth label technology, but the warp of cloth label is fixed and the pattern is expressed by weft; However, the basic weft of the ribbon is fixed, and the pattern is expressed by the warp, using a small machine. It may take a long time to make a plate, produce the yarn and adjust the machine every time, and the efficiency is relatively low. But you can make a wide variety of dazzling products, not always those faces like cloth labels.
The main function of ribbon is decorative, and some are functional. Such as popular mobile phone suspenders. After the tape is woven, you can also screen print all kinds of characters/patterns, which is generally cheaper than weaving the characters/patterns directly. Ribbon is made of polyester high-strength material, which has the characteristics of high strength, high temperature resistance, high strength and flame retardancy. According to the requirements of sweat prevention, a layer of pvc can be adhered to the outer surface of the webbing, and the pvc and the webbing can be fully adhered together through a special process, which has the effects of wear resistance, corrosion resistance, sweat prevention and beauty.
Therefore, the evaluation indexes of color fastness are different. Therefore, it is very important to determine the types of dyes on printing and dyeing textiles for evaluating their color fastness. According to the principle of dyeing and finishing, different kinds of dyes are used for different textile raw materials. According to the composition of textiles, the types of dyes used can be preliminarily inferred, and then targeted tests are carried out to verify them.
Post time: Jun-07-2023