During the weaving process, fibers need to be sized to increase their fastness. When dyeing, bleaching, and printing the fabric, the paste needs to be removed, and after printing, the paste also needs to be removed. The quality of desizing directly affects the quality of the finished product, such as hand feel, whiteness, smoothness, color dosage, white core, and strength. Most of them use starch slurry for sizing, and there are many methods for desizing, such as caustic soda, sulfuric acid, hydrogen peroxide, etc. However, these chemical products not only damage the fabric and are difficult to operate, but also pollute the environment.

What is an anti dye? Generally speaking, anti dyeing agents refer to substances that can prevent the formation of patterns due to dye coloring on fiber fabrics or during the printing and dyeing process. From the analysis of physical and chemical properties, anti dyeing agents specifically refer to anionic surfactant complexes formed by chemical modification of various non ionic surfactants and buffering agents. Has good dispersion and solubilization capabilities.

According to the type of resin, there are thermosetting and thermoplastic resins, but thermosetting resins are the main type. For example, urea formaldehyde resin, melamine formaldehyde resin, thiourea resin, epoxy resin, etc., are actually the initial contractions of resin monomers. These initial contractions can be dissolved in water or solvent, penetrate into the interior of the fiber, and then undergo high-temperature baking. The active group undergoes covalent crosslinking reaction with the hydroxyl group in the long chain molecules of cellulose, connecting the adjacent molecular chains of cellulose fibers or forming a network structure of polymers in the gaps of the fibers and depositing, Thus, the fabric maintains a long-lasting wrinkling effect.

The purpose of washing water: 1. Enhance the stability of clothing. By washing water, it can shrink in advance and stabilize the size. 2. The aesthetics of clothing are enhanced, and different washing methods can produce various colors and textures with different effects, which are highly favored by people and increase the added value of clothing. What is the difference between rinsing cloth and washing cloth? Washing cloth requires a washing process before leaving the factory. The purpose is to shrink the cloth, or add some additives to make the fabric soft, make the color soft, and so on. The fabrics used in some casual clothing series and Niuzi series are all washed fabrics.

1.What is a fluorescent whitening agent?Fluorescent whitening agents themselves are almost colorless dyes that can absorb harmful ultraviolet rays from light, converting some into their own vibration energy and the other into visible blue light. This way, the clothes look whiter and more vibrant. In fact, it utilizes a visual effect.

1、Reasons for the appearance of dyeing defects. 1. Reason for grey fabric: Many potential defects in dyed fabric are caused by poor quality of grey fabric, such as weaving defects and yarn defects. Due to the mixing of different batches of yarn, weaving defects such as warp and warp stripes, weft and weft stripes are formed on the fabric.