what are the fixation methods of non-formaldehyde fixing agents for textiles?
release date：2020.09.16 pageviews：22
what are the fixative ways of non-aldehyde fixative agents used in textiles? the following is the enrich chemical series finishing of aldehyde-free color fixing agent solid color way.
1, using the molecules of the fixing agent yang lotus with the anionic dye reactive electrostatic bonding formation, dye and the fixing agent on the fiber calm and reduce its solubility in water and improve the dye content on color fastness to soaping and white cloth, the stronger the cationic fixing agent, the better its on color fastness to soaping, white cloth, such as the introduction of quaternary ammonium salt groups, can improve the fixation effect of fixing agent, fixing agent of shanghai chuan aid agent works dur and fixing agent tcd - r, eccofixfd - 3 that is this case.
2. the reactive group in the color fixing agent molecule is cross-linked with the reactive group on the dye molecule and the hydroxyl group on the cellulose molecule, so as to reduce the water solubility of the dye and improve the soaking, coloration and wet ironing fastness of the dye.the so-called wet ironing fastness refers to the fastness of reactive dyes transferred from the dye to the wet cloth when the broken bond and floating color are ironed. to improve the wet ironing fastness, cross-linking agent is a more effective method. the dyes or dyes and fibers cross linking, so that the dyes from the broken bond will no longer be transferred from the dye to the ironing cloth.the introduction of reactive groups (currently mainly epoxy groups) in the fixing agent can improve the wet ironing fastness, usually due to the lack of reactive groups in the market fixing agent, wet ironing fastness improvement effect is not as obvious as crosslinking agent.if the fixator is a high polymer containing the same amount of reactive groups, its ability to improve the fastness to wet irons is often worse than that of a low molecular weight fixator.
