Rapid penetrant Fast T-40 (dioctyl sulfosuccinate sodium salt) is a highly efficient anionic surfactant. Its core advantage lies in extremely low surface tension and excellent rapid penetration capability. When used, it is typically added directly to the working liquid and stirred evenly, requiring no special dissolution equipment. Since the product itself is a colorless to light yellow transparent viscous liquid, it can quickly disperse in water at room temperature, making operation simple.
In different industries, the addition method of Fast T-40 varies slightly: in textile printing and dyeing, it is generally added to pretreatment liquor, dye liquor, or finishing liquor; in pesticide formulations, as a wetting and spreading aid, it can be added during the formulation preparation stage; in industrial cleaning, papermaking, and leather processing, it is directly formulated into the working liquid. Its low-foam characteristic makes it particularly suitable for continuous industrial production, reducing defoamer usage and lowering overall costs.
It should be noted that although Fast T-40 is compatible with anionic, nonionic, and most cationic systems, small-scale compatibility tests are still recommended before compounding to confirm no undesirable phenomena such as precipitation, stratification, or antagonistic effects. The product exhibits excellent stability in acidic, alkaline, and hard water systems, adapting to a wide range of process conditions.
(Note: The following are general industry reference data; actual usage should be optimized based on specific conditions.)
| Application Field | Recommended Addition Amount | Addition Method |
|---|---|---|
| Textile Printing & Dyeing — Pretreatment (Desizing\/Scouring\/Bleaching) | 0.1% ~ 0.5% (based on working liquid mass) | Add directly to the pretreatment bath and stir evenly |
| Textile Printing & Dyeing — Dyeing Process | 0.5 ~ 2.0 g\/L | Add to the dye liquor, circulate evenly, then introduce fabric |
| Textile Printing & Dyeing — Finishing | 0.1% ~ 0.3% | Compound with finishing agents |
| Pesticide Formulations (Wettable Powder\/Water Dispersible Granule) | 1% ~ 5% (based on total formulation mass) | Add during blending or spray granulation stage |
| Pesticide Formulations (Suspension Concentrate\/Soluble Concentrate) | 0.5% ~ 3% | Add during preparation stage and stir thoroughly |
| Daily Chemical & Industrial Cleaners | 0.5% ~ 3% | Blend into cleaning formulation |
| Papermaking — Sizing & Coating | 0.05% ~ 0.3% (based on sizing agent or coating mass) | Add to sizing agent\/coating and disperse evenly |
| Leather Processing — Soaking\/Degreasing | 0.2% ~ 1.0% (based on hide weight) | Add to soaking or degreasing bath |
Prioritize small-scale tests: When using for the first time or changing process conditions, it is recommended to conduct small-scale gradient tests to determine the optimal addition amount. Start from a lower concentration and gradually increase, observing changes in penetration speed and effect, to find the most economical and effective dosage.
Temperature adaptability: Fast T-40 performs excellently under both normal and medium temperature conditions. If the process allows moderate heating (e.g., 40~60°C), the penetration rate can be further enhanced, but it is not necessary; normal temperature suffices for most scenarios.
Compounding enhancement: Fast T-40 can be compounded with nonionic surfactants (such as Peregal O series) or other anionic auxiliaries, often producing synergistic effects that improve overall wetting and penetration performance. It is recommended to optimize the compounding ratio through orthogonal experiments.
Leverage low-foam advantage: In continuous, high-speed production lines (such as continuous dyeing machines, high-speed paper machines), its low-foam characteristic effectively reduces foam interference and decreases downtime for cleaning.