Views: 0 Author: Site Editor Publish Time: 2026-08-21 Origin: Site
In the dyeing and finishing process of polyester and its blended fabrics, the cleaning procedure after high-temperature dyeing is a critical step that determines the final quality of the product. Failure to effectively remove unfixed disperse dye residues, oligomers, and auxiliary chemicals adsorbed on the fiber surface will directly result in poor color fastness, dull shades, and even serious staining on white grounds. Zhejiang Kefeng Silicone Co., Ltd., leveraging its over two decades of technical accumulation in the textile printing and dyeing auxiliaries field, and its profound understanding of the industrial production of core products like block silicone oil, has developed a highly effective High-Temperature Soaping Agent. Specifically designed to complement the high-temperature, high-pressure dyeing process of polyester fibers, this product aims to achieve a one-step thorough cleaning under high-temperature conditions, leveraging its excellent scouring, dispersing, and anti-staining capabilities. It provides a reliable guarantee for obtaining polyester products with high fastness and brilliant shades.
Polyester fibers have a dense structure and typically require dyeing under high-temperature, high-pressure conditions around 130℃, using disperse dyes and significant amounts of dispersants. After dyeing, raising the temperature to 80-100℃ for soaping is a key step to remove unfixed dyes. Kefeng's High-Temperature Soaping Agent is developed specifically for this complex environment. Its formulation consists of a blend of high-temperature resistant nonionic or anionic surfactants, highly effective dispersants, and polymers.
Powerful Dispersing and Scouring Core: Targeting the two most challenging residues after polyester high-temperature dyeing—unfixed disperse dye particles and oligomer or tar spots generated during the dyeing process—the dispersants in the formulation rapidly adsorb and encapsulate these hydrophobic particles, preventing their redeposition onto the fiber surface.
Excellent Anti-Staining Performance: The product forms a stable dispersion system, effectively "locking" the removed dyes within the soaping bath to prevent them from re-staining the white areas of the fabric or the equipment, ensuring the whiteness staining grade reaches level 4 or above.
Excellent High-Temperature Stability and Cleaning Efficiency: This soaping agent maintains stable performance and low foaming at high temperatures of 95-100℃, which is the optimal temperature range for polyester soaping. It effectively reduces surface unfixed dyes on polyester/cotton blended fabrics and significantly improves color fastness. In some cases, it can eliminate the need for a subsequent reduction clearing step, thereby enhancing production efficiency and saving energy costs.
Outstanding Shade Protection and Fastness Enhancement: While powerfully removing unfixed dyes, the High-Temperature Soaping Agent also protects the already dyed fiber shade to the greatest extent possible, ensuring the cleaned fabric exhibits a pure, bright shade without any dullness. Simultaneously, by thoroughly removing unfixed dyes, it significantly improves various color fastness indicators such as washing and rubbing fastness.
Broad Applicability and Eco-Friendly Characteristics: This product is suitable not only for 100% polyester fabrics but also for a wide range of blends including polyester/cotton, polyester/viscose, and polyester/modal. Its formulation aligns with current environmental trends, free from prohibited substances such as phenol, bisphenol A, formaldehyde, and heavy metals, meeting the safety and environmental requirements of modern textiles.
To achieve the best cleaning results, it is recommended to apply the product according to the equipment type and fabric variety, referencing the following process parameters:
Intermittent Process (e.g., in dyeing machines): After dyeing and draining, first rinse with hot water at 60-90℃ in an overflow manner. Then, add 1-5 g/L of the soaping agent at 95-98℃ and treat for 10-15 minutes, followed by rinsing with warm water.
Continuous Process (e.g., in a padding mangle): It is recommended to add 3-6 g/L of the soaping agent in the third or fourth washing compartment, carry out soaping at 98℃, followed by rinsing with hot and then cold water.
One-Bath Soaping for Polyester/Cotton: For polyester/cotton blended fabrics, this product can be directly applied for one-bath high-temperature soaping after dyeing with disperse/reactive dyes or disperse/vat dyes, simplifying the process and achieving energy savings, consumption reduction, and emission decrease.
The Kefeng High-Temperature Soaping Agent serves as a reliable quality safeguard in the polyester dyeing and finishing process. With its high-temperature stability, powerful dispersing and anti-staining properties, and outstanding shade protection capability, it fundamentally addresses the challenges of stubborn unfixed dyes and poor color fastness after high-temperature dyeing. Choosing this product means opting for higher dyeing success rates, more consistent product quality, and more environmentally friendly production processes, adding a solid technical guarantee for printing and dyeing enterprises in a highly competitive market.
