Analysis Of Reactive Dyestuff Printing On Pure Cotton Textiles

Less than P, people in the industry know that there are various kinds and methods of fabric printing. For example, clothing printing, direct printing, screen printing are all important methods for printing on textiles. For a > strong > pure cotton < /strong > /a, the pure osmotic effect is not enough. It is necessary to separate the two dyes effectively, that is, gel screening in liquid chromatography. In the process of color printing, the first step is to release sufficient amount of water from the dye paste. Secondly, two kinds of dyes that can be extravasated and can not be extravasated are selected. The important factors affecting the effect of color infiltration are: < /p >
< p > (1) the sieving effect of paste gel: make the paste release water, do not get the effect of dye discoloration, and the gel release water of the paste can get the effect of discoloration. The synthesis of gelatin and corresponding gel reagent B salt is the best for reactive dye. < /p >
< p > (2) apply < a > strong > dye > /strong > /a >: in diffusion printing, the faster the diffusion rate of dyestuff as gel is in gel, the slower the diffusion rate of dye as a retention color. Suitable reactive dyes are: reactive yellow M one 5G, scarlet K 4G, brilliant blue K 3R, turquoise blue K GL, brilliant blue K NG. The reactive dyes suitable for the retention of color are: active yellow K - RN, orange K - GN, bright orange K - G, bright red K 2BP, dark blue K R. < /p >
< p > (3) < a href= > http://cailiao.sjfzxm.com/Matertial/show/default.aspx > strong > moisture content of fabric < /strong > /a > the separation effect of gel is achieved under the condition of liquid moving in a direction. In the process of color printing, the directional movement is the movement of water released to the color block when the color paste is printed under the capillary action of the fabric. It is not enough to rely on the color paste to release enough water to get enough penetration. Cotton fabric should have a moisture content of about 25%. When the moisture content is less than 20%, the degree of osmotic is not ideal; the infiltration degree is obviously worse than 28%. < /p >
< p > (4) other factors: besides the large dye particles, the factors affecting dye exudation and retention are: the type and number of functional groups of dyes, the size of the functional groups and the size of the surface of the paste and the fabric (i.e. the adsorbent), as well as the competition of auxiliaries, dyes and water on the surface active centers of the adsorbent. The results showed that the color of the retained color was blurred because urea changed the force of the dye on the gel and fabric. < /p >
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