Formaldehyde-Free Fixing Agent for Nylon Dyeing

In the textile dyeing process, color fastness has always been a crucial indicator for evaluating fabric quality. Especially for polyamide fibers such as nylon, dyeing with acid dyes or metal complex dyes often results in insufficient wash fastness and perspiration fastness. While traditional fixing agents can improve color fastness, some products contain formaldehyde or bisphenol-based chemicals, posing potential risks to the environment and health. With increasingly stringent environmental regulations and rising consumer demand for safe textiles, formaldehyde-free, low-toxicity, and highly efficient fixing agents are becoming the preferred choice for textile companies.

To address this market demand, we have launched Sylic D2834 (D527) formaldehyde-free fixing agent. This is a highly efficient color fastness product specifically developed for nylon fiber dyeing, significantly improving color fastness to washing, perspiration, and other conditions, while fully complying with environmental standards.

Acidic fixing agent Sylic D2834 (D527)

Technical index

Composition: Aromatic sulfonic acid condensate

Appearance: Wine-red transparent liquid

PH (1% aqueous solution): 3-5

Ionicity: Cationic

Solubility: Miscible with water in any proportion

Product Performance

1.A color-fixing agent specifically designed for nylon (polyamide) dyed with anionic dyes (acid dyes). After treatment, the wash fastness and perspiration fastness of dyed fabrics are significantly improved.

2.Excellent lifting power for high-performance results.

Free of BPA, phenols, and formaldehyde; environmentally friendly and meets all environmental requirements.  

Applications:

Suitable for nylon (polyamide) fabrics, used for color fixing after dyeing with acid dyes or metal complex dyes. After treatment, the wash fastness, perspiration fastness, and other properties of the dyed fabrics are significantly improved.

Application Method：

When using this product in immersion processes, it is recommended to neutralize it with alkali after fixation before removing it from the vat to prevent fixation spots. For fixation treatment after dyeing with acid dyes or metal complex dyes:

Light colors: 2-3% (o.w.f)

Medium-dark colors: 3-5% (o.w.f)

Liquor ratio: 1:10-15

Temperature and time: 85℃, 20-30 minutes (Temperature and time can be adjusted based on customer’s laboratory test results). Please adjust the specific dosage according to the sample.

Precautions

This product’s undiluted solution does not contain bisphenol A/B/S/F/AF or phenol. Before use, all residual working solution containing common acid solids (including bisphenol and phenol) must be drained from the bath and the surface thoroughly cleaned to prevent bisphenol and phenol residue from remaining on the fabric.

Application Effect

Application Process: 80℃ × 20min Impregnation Dosage: 4% (o.w.f)

1.Wash fastness

2.Water fastness (5g/L laundry detergent in water, bath ratio 1:20, starting at 60℃, soak for 5 minutes)

3.Perspiration Fastness

In conclusion, Sylic D2834 formaldehyde-free color-fixing agent not only represents a breakthrough in performance compared to traditional color-fixing agents, but also achieves industry-leading levels in environmental protection and safety. Whether for light or medium-dark nylon fabrics, the proper use of Sylic D2834 allows textile companies to achieve efficient color fixation after dyeing, meeting customers’ dual requirements for color fastness and environmental protection, and contributing to the development of sustainable textiles. Get free samples,please kindly contact us :info@sylicglobal.com