Reducing discharge method is the use of discharge agent for dyes containing azo-based cracking, achromatic printing process. Since the azo group of the azo-type reactive dye can be smoothly cleaved under the reducing discharge conditions, the original hue can be eliminated. However, the amine groups formed after its cleavage are yellow to orange chromophores, which are not suitable for use in discharge printing when the whitening effect is poor when bonded to fibers. Dischargeability is affected by the chemical structure of the dye. During the white-dyeing, the molecular structure of the reactive groups and the bonding moieties remaining on the fiber chains will have a certain influence on the whitening property and the fixing property with a time-dependent change. Since the monochlorotriazine dye forms a colored amine group with a large molecular weight after reducing and cracking, orange remains on the fiber, which is not suitable for discharge printing. Does not apply to pull white: Chlorotriazine dyes in the reduction, after the crack, the small molecular weight of colored amine residues in the fiber chain, stained to a small extent, pale dye for discharge, medium and dark dye should not be used. Pale dyes are suitable for whitening: Vinyl sulfone type dyes are suitable for discharge printing because they have only small molecular weight and colorless amine groups on the fiber chains after reduction and cracking. Dark colors can also be used for whitening: The dye-dyeability of reactive dyes is irrelevant to reactive groups, but reactive groups such as triazine reactive dyes or pyridine-reactive dyes are generally attached to the couple component, and therefore, they are attached to the fiber chains after discharge. Large-molecular-weight colored amine groups will remain, and many products are not suitable for discharge. On the other hand, the reactive group of the vinyl sulfone type dye is generally attached to the benzene cyclic amine group having a relatively small molecular weight, and the small-molecular-weight and colorless amine group remaining on the fiber chain after discharging the dye is suitable for discharge. More products. As mentioned above, whether the dye can be used for discharge is related to the chemical structure of the dye, but the commercially available dye may be mixed with isomers or coloring components. Even if the index number is the same, the discharge performance is not the same. Please carefully select the dye and select the dye for discharge. Polo T-Shirt,Polo T Shirts For Men,Polo Neck T Shirt,White Polo T Shirt Changzhou Xinzhi Chain Information Technology Co.Ltd , https://www.zgczxzl.com
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June 12, 2023