The Generation Reason and Improve Measures of Fixation Spot Caused By Nylon Dye-Fixing Agent
Time: Click: 398
1.Dye-fixing agent theory.
The basic principle is the covering theory, fixing agent is polymer, containing many sulfonic group with nylon fiber end amino bonded, forming a net structure, coated with dye, the color fastness to washing can be guaranteed and improve.
In general, dye-fixing agent is as follows:
Both the higher and lower temperature have negative influence on the dye-fixing effect. When the temperature is too low, the dye fixing agent can not be absorbed completely. When the temperature is too high, the dye-fixing agent penetrate too much to the inner of fiber and the covering effect will affected. So both of them will effect the result.
3.The reason for nylon color fixing spot
The dyeing Nylon color fixing spot usually be caused by the following reasons:
(1)the excessive hardness (Ca++, Mg++)of water
(2)the weak cationic auxiliary residue on the fabric
(3)the influence of acid
(4)the high shear spitting from dyeing machine(such as Jet dyeing machine)
(1) Add water ameliorant to improve the hardness of the water.
(2) Choose weak cationic levelling agent or the combining levelling agent of anionic and Ionic belling agent to avoid the agglutination sediment of levelling and dye-fixing agent.
(3) Add little AVOLAN IS to ensure the residue of levelling agent is lowest.
(4) In order to avoid the agglutination and sediment of the dye-fixing agent and high concentrated acid, we can dilute the acid with water and slowly poor into it.
(5) Another methods is choosing dye-fixing agent that do not need to combine with acid, which can not just avoid the desperation and save the operation time.
5. For some high shearing force dye, such as, Jet dyeing machine, we recommend some non-activated shearing dye-fixing agent.
May 5, 2017Non-formaldehyde fixing agent property is evaluated according to the fixing result of dyed fabric: Dyeing and sampling→ fixing → the evaluation on the fixing agent: ①color changes in hue ②Wet fas...view
May 8, 2017Lead: Some dyes can dye bright-colored fabrics and the direct dye, acid dye and other anionic water-soluble dye have wild chromatogram. But the water-soluble groups on the dyes makes the bad wet fast...view
May 9, 20171. Water Slurry Preparationthe key for preparing water slurry is adhesive agent.When we prepare dark color slurry, we should choose high solid good adhesive agent, and matching with hand-feeling modul...view
May 10, 2017Waterborne polyurethane possess good film covering property in itself. If we introduce cationic chain extender at the time of compounding polyurethane, we can get cationic waterborne polyurethanne. T...view
May 10, 2017It will improve the wet fastness of nylon and its blended fabrics after dyeing and printing . It will improve the nylon fabrics color fastness at continuous dyeing . And it have less impact on the gl...view