Transfar Zhilian Co., Ltd.
Span Series Span Series

Transfar Unmatched High-Purity Span Series Surfactants

The Siban series surfactants exhibit outstanding lipophilicity and emulsion stability, while also featuring low toxicity and acid resistance. Their applications are exceptionally broad, spanning not only textiles, pesticides, and petroleum sectors but also providing stable support for formulations in cosmetics, coatings, and paints, thereby enhancing product performance.

Benefits of Transfar Span Series Surfactants

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Performance Advantages: Strong lipophilicity, stable emulsification effects, low toxicity, acid resistance, and adaptability to complex application environments.

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Application Advantages: Covers multiple industries including textiles, pesticides, and petroleum, with broad applicability and outstanding versatility.

Application Areas for Span Series Surfactants

Textile Industry

Serves as an emulsifier and dispersant in textile oils, ensuring stable adhesion to fiber surfaces. Enhances lubricity and antistatic properties while reducing spinning breaks. Improves dye dispersion during fabric printing and dyeing, guaranteeing uniform coloration.

Textile Industry
Pesticide Industry

As an emulsifier for pesticides, it uniformly emulsifies active ingredients with water to form stable emulsions. This enhances the adhesion and penetration of pesticide solutions on crop surfaces, improves efficacy utilization, and reduces the irritancy of pesticide formulations.

Pesticide Industry
Petroleum Industry

Used in drilling fluid and completion fluid systems during oil extraction, it provides emulsifying and lubricating functions, stabilizes drilling fluid performance, and reduces equipment wear. It can also serve as a component in crude oil demulsifiers to facilitate oil-water separation.

Petroleum Industry
Cosmetics Industry

Suitable for creams, lotions, lipsticks, and similar products, it functions as an oil-in-water emulsifier. This ensures thorough blending of oil and water phases into a stable system, improving product texture smoothness. Its low toxicity aligns with cosmetic safety requirements.

Cosmetics Industry
Coatings and Paints Industry

Serves as an emulsifier and dispersant to improve dispersion of pigments and fillers in coatings, enhance film uniformity and stability, and increase acid resistance, thereby extending coating lifespan. Suitable for diverse coating applications.

Coatings and Paints Industry

FAQs About Transfar Span Series Surfactants

Can Span surfactants be blended with the Tween series? What performance advantages does this blending offer?

Span and Tween (polyoxyethylene sorbitan fatty acid esters) form a classic blending combination. Span provides lipophilicity while Tween contributes hydrophilicity. Blending allows flexible adjustment of the HLB value to suit different emulsion systems. This blend also enhances emulsion stability, reduces surface tension, and boosts cleansing or dispersing efficacy. For instance, Span 80 + Tween 80 is commonly used in food emulsions and cosmetic creams to address the limitations of single emulsifiers.

What is the temperature tolerance of Span surfactants? Can they be used in high-temperature processing applications (e.g., textile dyeing, plastic processing)?

The Span series exhibits excellent thermal stability, with decomposition temperatures generally above 200°C. It can withstand high-temperature dyeing in textile printing and dyeing (120–130°C) and melt extrusion in plastic processing (150–180°C). It maintains emulsifying and dispersing properties at elevated temperatures without thermal decomposition failure. Only above 250°C does gradual oxidation occur, making it suitable for most industrial high-temperature processing requirements.

What is the core function of Span surfactants in pesticide formulations? What advantages do they offer compared to other emulsifiers?

Span primarily functions as an oil-in-water emulsifier and dispersant in pesticides, stabilizing active ingredient particles and preventing separation in emulsifiable concentrates and suspension concentrates. Its advantages include strong lipophilicity for efficient dispersion of oil-soluble pesticides, excellent compatibility with active ingredients, and resistance to demulsification. When blended with Tween, it enhances crop leaf adhesion, reduces runoff, and is suitable for herbicide and insecticide formulations.

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