Textile, Dyeing, Papermaking

In various textile manufacturing processes (such as fiber pretreatment, rinsing, lubrication, dyeing and finishing, etc.), surfactants are widely used as detergents, wetting agents, anti-static agents, slow-dyeing agents, detangling agents and softeners, for cleaning fabric oil stains, improving fabric feel, enhancing the uniformity and durability of fabric dyeing, etc. In the paper industry, surfactants effectively improve paper quality by improving the dispersion of the pulp, the stability of sizing and coating, and controlling foam generation. Industrial cleaning and water treatment

● Wetting agent: As a fiber wetting agent, it reduces the surface tension of the fiber, helping water or chemical treatment solutions to penetrate the fiber surface quickly and uniformly during the fiber pre-treatment stage and the dyeing stage, promoting fiber wet treatment. As a coating liquid for paper or sizing solution, it enables the uniform wetting of pulp and fillers on paper fibers, facilitating sizing and coating. Common types: non-ionic type (alcohol ether, APG); anionic type (sulfonate, etc.).

● Desizing agent: Used for emulsifying and dispersing pulp materials (starch, polyvinyl alcohol, etc.), facilitating the action of enzymes or oxidants. For example, using non-ionic wetting agent + enzyme preparation can effectively accelerate the hydrolysis of pulp materials.

● Refiner agent: Used for emulsifying and removing natural oils and waxes from fibers, thereby improving the whiteness and hydrophilicity of textile fibers

● Penetrating agent: Used in the dyeing process, it helps the dye solution penetrate into the fibers uniformly, improving the dyeing speed and dye uptake rate, and also promoting the uniform penetration of color paste, enhancing the clarity of printing. Typical products include Penetrating Agent JFC (sodium salt of fatty alcohol polyoxyethylene ether sulfate).

● Evening agent: Used in the dyeing process, evening agents/finishing agents slow down or control the dye absorption of fibers, helping to produce more uniform colors in textile fibers and preventing color bleeding. Typical products include acrylic copolymers, organic silicon and fluorocarbon surfactants.

● Dispersant: Used in the dyeing process, it can stabilize the dispersion of dye particles, preventing dye flocculation or precipitation. Common examples include naphthalene sulfonate condensates (dispersion agent NNO, dispersion agent MF); used in paper coating pigment slurry and white water circulation system, it can disperse fillers (calcium carbonate, talc powder), pigments, and textile agglomerates and sedimentation, common examples include lignin sulfonate, polycarboxylate, sulfonic acid salt, etc.

● Emulsifier: Used in the dyeing process, it can emulsify pigments or oily dyes in the printing paste, and most textile auxiliaries are emulsions, and preparing emulsions also requires emulsifiers; used in paper sizing agents, it can enhance the water resistance and printing adaptability of paper.

● Foam inhibitor: Used in pulp tanks and paper machine mesh sections, it can control foam during pulping and papermaking processes, avoiding air holes and paper defects, common examples include polyether modified silicone oil, low foam non-ionic surfactant.Fixing agent | Anionic dyes combined with cationic surfactants can significantly enhance the fixation of dyes on fibers.

● Detergent: Used as a detergent in the textile wet processing industry, it washes away various dirt, oil stains, etc. from the fabric, and dissolves or disperses the removed dirt and prevents its re-deposition on the clean fabric surface.Antistatic agent: Textile industry is one of the largest markets for antistatic agents, antistatic agents can reduce frictional charging between fibers. Mostly cationic or amphoteric ion surfactants.

● Softening agent: Used to improve fabric feel, giving the fabric a smooth, fluffy or elastic feel. Common examples include quaternary ammonium salt type cationic softeners, silicone emulsions (containing non-ionic emulsifier), for example, using quaternary ammonium salt type softeners to improve the feel and prevent fraying.

● Waterproof and oil-resistant finishing agent: Through fluorine or silicone surfactants forming a hydrophobic layer on the fiber surface, thereby making the fabric surface have waterproof and oil-resistant effects.