Common auxiliaries in printing and dyeing and their functions (referred to in the laboratory)

2015-05-12
Common additives and their functions
1) Penetrant: reduce the surface tension of the solution, so that the fiber can be easily wetted and penetrated
2) Detergent: It has a washing effect, makes the dirt on the fabric easy to remove, and serves as a scouring and bleaching aid.
3) Caustic soda (NaOH): strong alkali, used as a scouring agent for cotton cloth, and also as a stripping aid. After use, it can be washed away with acid
4) Soda ash (sodium carbonate Na2SiO3): used as water softener, T/C fabric scouring aid and reactive dye fixing agent
5) Baking soda (sodium bicarbonate NaHCO3): can be used as a fixing agent for reactive dyes
6) Trisodium phosphate: Na3PO4 plays the role of softening water
7) The sixth series of sodium phosphate: plays a role in softening water
8) Sodium silicate (Na2SO4): used as a scouring aid for cotton cloth, and also as a stabilizer for hydrogen peroxide bleaching
9) Hydrogen peroxide (H2O2): bleaching agent, it can bleach fabrics and can also be used as deoxidizer
10) Sodium sulfite (Na2S2O3): used as a scouring aid for cotton fabrics to prevent brittleness of cotton fabrics, and also as a residual oxygen neutralizer and dechlorinating agent
11) Sodium sulfide (Na2S): dyeing auxiliaries for sulfur dyes, which can fully reduce and dissolve sulfurized fuels
12) Sodium hypochlorite (NaClO): Used as a bleaching agent, and can also be stripped and washed
13) Table salt (NaCl) or sodium sulfate (Na2SO4): used as an accelerator for direct reactive dyes and sulfur dyes, which can increase the dye uptake rate
14) Sodium sulfide (NaS2O4): strong reducing agent, peeling and reducing cleaning effect
15) Dispersing agent (or diffusing agent): used as a dispersing fuel dyeing auxiliary, so that the disperse dye is evenly dispersed in the dyeing liquor to ensure the stability of the dyeing liquor
16) Glacial acetic acid (HAC): used as a disperse dye dyeing auxiliary to adjust the pH value, and used as a neutralizer for alkali
17) Ammonium sulfate [(NH4)2SO4]: Used as an anti-alkali agent for disperse dyes, and can also play a role in jumping PH value
18) Levelling agent: it can make the dye evenly dyed and achieve the leveling effect
19) Oxalic acid: can wash away the rust spots on the fabric
20) Fixing agent: (fixing agent Y or M) makes the direct dyes firmly adhere to the fiber, thereby improving the color fastness
21) Softener: combine with fiber or adsorb on the fiber surface to moisturize and improve the feel of fabric
22) Ping Ping O: as a direct, reactive dye leveling agent
23) Varnish: remove oil stains on fibers
24) Puffing agent: to puff the fiber and help the material to penetrate into the fiber
25) Repair agent: make the fiber absorb the color evenly, which is conducive to leveling dyeing
26) Brightener: improve the whiteness of bleached cloth
27) Defoamer: reduce or remove the foam of the solution
28) Soda: Used as a deoxidizer to remove residual oxygen
29) Taikoo oil: used as a penetrant for dyeing sulfur dyes, strong penetrating power can make sulfur black, cloth black, soft hand feeling
30) Urea: a solubilizer and also an anti-brittle agent for sulfur dyes
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