Textile Chemicals

Pretreatment (Desizing / Scouring / Bleaching)

1. Remove fabric impurities (cotton wax, pectin, weaving oil, starch size)
2. Improve fabric wettability for subsequent processing

- Anionic: Sodium Dodecyl Benzene Sulfonate (LAS), Sodium Dodecyl Sulfate (SDS), α-Olefin Sulfonate (AOS)
- Non-ionic: Fatty Alcohol Polyoxyethylene Ether (AEO-7/AEO-9), Isotridecyl Polyoxyethylene Ether (TX-10)
- Compound System: AEO-9 + LAS (ratio 1:1.5)

1. Anionics achieve emulsification and decontamination through "hydrophobic end adsorbing oil stains - hydrophilic end bringing them into water";
2. Non-ionic surfactants are resistant to hard water and have good low-temperature stability, avoiding calcium and magnesium salt residues on fabrics;
3. The compound system synergistically improves decontamination efficiency (20%-30% higher than that of a single type)

Dyeing Stage (Level Dyeing / Color Fixing)

1. Prevent dye aggregation to avoid "uneven color" and "color difference"
2. Improve the binding fastness between dye and fiber

- Non-ionic: Peregal O (Fatty Alcohol Polyoxyethylene Ether), Polyoxyethylene Sorbitan Fatty Acid Ester (Tween-80)
- Amphoteric: Cocamidopropyl Betaine (CAPB)
- Cationic: Cetyltrimethylammonium Chloride (CTAC, for color fixing)

1. Non-ionic surfactants / Tween-80 wrap dye molecules to form stable colloids, delaying the dyeing speed of dyes to achieve uniform dyeing;
2. Cationic CTAC "anchors" dyes on the fiber surface through "positive charge adsorbing negative charge of fibers", improving washing fastness

Finishing (Softening / Antistatic / Waterproofing)

1. Improve fabric hand feel (softness, smoothness)
2. Reduce static accumulation on chemical fiber fabrics
3. Endow fabrics with waterproofness

- Cationic: Dioctadecyl Dimethyl Ammonium Chloride (D1821, softener), Stearamidopropyl Dimethylamine (antistatic agent)
- Non-ionic: Polyoxyethylene Polyoxypropylene Ether (auxiliary for waterproof finishing)
- Special Surfactants: Organosiloxanes (e.g., polyether-modified siloxane, which balances softness and antistatic properties)

1. The hydrophobic end of cationic surfactants adsorbs on the fiber surface, and the hydrophilic end faces outward, forming a "lubricating film" to reduce the friction coefficient between fibers;
2. Antistatic agents absorb moisture in the air through their hydrophilic ends to form a conductive layer, eliminating static electricity;
3. Organosiloxanes form a dense film on the fabric surface to block water penetration