Introduction of fixing agent used in printing processing

1 Resin type fixing agent, which is a condensate of methanol, such as cyanide, dicyandiamide, melamine, urea, diethylenetriamine, fertilizer, etc., such as fixing agent Y is dicyandiamide, chlorination lock and methanol The condensate can improve the resistance of the reactive dye to the car wash and the chlorine fastness, but has a certain influence on the light fastness. The release of formaldehyde on the fabric after use has been banned.

2 Resin type low formaldehyde fixing agent is a cationic resin type low formaldehyde fixing agent made of cyanomethyl rubber, diethylene triacrylate or the like with hydroxymethyl or ZD resin, which has both reactive groups and dyes. It is cross-linked with hydroxyl and amino groups in the fiber; it has a cation in the molecule, which can be combined with a cationic dye to further improve the soaping fastness of the reactive dye. However, a small amount of formaldehyde is released after use.

3 reaction type formaldehyde-free fixing agent, using epichlorohydrin as raw material, reacting with amine, ether, nucleic acid, catalysis, etc., commonly used monomethylamine, dimethylamine, diethylene 2 amine, cyclodization mixture A reactive fixing agent is prepared from the gum and epichlorohydrin. The biggest advantage is that it can improve the wet rubbing fastness of the clean dye. If the condensation resin of the double cyanide rubber and the diethylene triacrylate is reacted with the epoxy propylene, the reaction resin type fixing agent is better. The various fixing agents prepared by using dicyandiamide as a raw material have a brownish-brown appearance, and generally cause discoloration only after use.

The quaternary iron-rich high-fruit aldehyde-free fixing agent is a quaternary vinyl monomer which is polymerized to form a high polymer. For example, a fixing agent formed by diallyl dimethyl chloride casting polymerization, which can form a polymer film on a fabric and electrostatically adsorb with an anionic dye, thereby improving the soaping fastness of the reactive dye. , a new generation of formaldehyde-free fixing agent.

The 5-day base- and reactive-based linear polymer fixing agent re-introduces the above-mentioned quaternary iron-based polymer into a reactive group, such as a dienyl zinc salt and a 2,2-azo-double ( 2 mercaptopropane) dihydrochloride polymerizes into a high polymer and reacts with epicyclopropane to form a quaternary salt high polymer fixing agent having a reactive group, which can form a high polymer on the fabric. The film can be combined with dyes and fibers to bridge the bridge, and the fixing effect is obviously improved.

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