1. Product Overview
Anti-phenolic yellowing agents are highly efficient textile auxiliaries specifically designed to prevent or significantly alleviate the yellowing of white or light-colored textiles, especially polyamides, wool and their blended fabrics, caused by phenolic compounds (mainly nitrogen oxides and ozone). This yellowing is usually manifested as an unpleasant yellow or brownish-yellow color, seriously affecting the appearance and value of the product. This product provides long-lasting protection for textiles through chemical neutralization and shielding effects, ensuring they remain as white as new for a long time.
2. Core issue: What is phenolic yellowing?
Phenolic yellowing is not directly caused by phenolic substances, but is a complex chemical process:
The main culprits: nitrogen oxides and ozone in the air.
Catalyst: Phenolic antioxidants in packaging materials, plastic fittings or flue gas.
The object of action: Certain chemical structures in fibers (especially polyamide and wool).
Reaction process: During storage or transportation, phenolic substances react with nitrogen oxides to form nitrosophenols. These substances then react with fibers to produce yellow nitroso derivatives or azo compounds, thereby causing yellowing.
3. Product mechanism of action
This antiphenol yellowing agent works in synergy through multiple mechanisms to fundamentally prevent yellowing from occurring:
Neutralization effect: Effectively capture and neutralize nitrogen oxides and ozone in the environment, eliminating the key reactants that cause yellowing.
Shielding effect: It forms a transparent protective film on the surface of the fiber, preventing phenolic contaminants from coming into direct contact with the fiber.
Reducing effect: Some products have reducing properties and can restore the initially formed colored substances to a colorless state, playing a "repair" role.
4. Main Features and Advantages
High-efficiency protection: It offers outstanding anti-phenolic yellowing and anti-gas yellowing performance, significantly enhancing the storability and quality of textiles.
Wide applicability: It is particularly suitable for fibers prone to yellowing, such as nylon, polyamide, wool, spandex, and their blended fabrics with cotton and polyester.
Minimal impact on color light: The treated fabric has good whiteness and is minimally affected by the color light and fastness of most dyes.
Excellent compatibility: It is well compatible with most anionic and nonionic textile auxiliaries (such as softeners and wetting agents) and can be used in the same bath.
Easy operation: Usually applied by impregnation or impregnation and rolling methods, the process is simple and easy to integrate into the existing production flow.
Environmental protection and safety: Carefully selected eco-friendly raw materials, meeting the environmental protection requirements of modern textile chemicals.
5. Typical physical and chemical properties
Appearance: Slightly yellow or transparent liquid
Ionic: Usually nonionic or weak cationic
pH value: 5.0-7.0 (1% aqueous solution)
Solubility: Readily soluble in cold water
Stability: Stable under normal storage conditions and over a wide pH range.
6. Application fields and recommended processes
Applicable fibers: nylon, polyamide, wool, spandex, silk, white or light-colored cotton and their blended fabrics.
Applicable processes: Post-treatment stage, such as after dyeing, before setting or the last water wash.
Recommended process
Impregnation method
Dosage: 1.0% - 4.0% (o.w.f.)
Temperature: 30°C - 40°C
Time: 15 to 20 minutes
Bath ratio: 1:10-1:15
After processing, conventional dehydration and drying are carried out.
Leaching method
Dosage: 10-40 g/L
Rolling allowance: 70% - 80%
Drying temperature: 100°C - 130°C
Please adjust the specific process according to the type of fabric, equipment conditions and the degree of yellowing risk, and conduct small sample tests.
7. Packaging and Storage
Packaging: 50 kilograms per drum, 125 kilograms per drum (plastic drum).
Storage: Keep in a cool, dry and well-ventilated place, away from direct sunlight. The shelf life is generally 12 months.
Safety: Non-hazardous, but it is recommended to wear regular protective equipment during operation. If it comes into contact with the skin or eyes, rinse thoroughly with plenty of water.
8. Summary
Our anti-phenolic yellowing agent is an ideal choice for manufacturers of high-end white and light-colored textiles. It can effectively solve the problem of phenolic yellowing caused by packaging, transportation and storage environments, greatly enhancing the quality stability and market competitiveness of the product. Whether used for sportswear, underwear, swimsuits or high-end fashion fabrics, it can provide a reliable "invisible protective layer" for them, ensuring that the end products always remain as bright as new.
