Making high-end textiles UV-resistant
UV-resistant treatment is an essential part of the functional textile finish for making high-end textiles UV-resistant. At present, the market prospects of UV-resistant textiles are very broad and the varieties of UV-resistant fabrics are becoming more and more extensive. Such as paragliding, swimsuits, tennis shirts, golf suits and jackets.
Applications
High-energy UV radiation easily causes aging of textile fibers and color fading. Therefore, it is of great importance to improve the UV protection of textiles. Especially those made for outdoor applications (outdoor fabrics) or that need to be waterproof. Anti-ultraviolet fabric is not only used for clothing fabrics, but also for umbrellas and decorative fabrics. In addition, textiles such as uniforms, tents, advertising cloth, tarpaulin, etc. These fields have higher requirements against UV finishing.
Process
During textile processing, the UV absorber determines the overall protection effect. Not only can it protect dyes and fibers of polymer material from destruction under the catalysis of light. More importantly, for applications such as sun umbrellas, it can maintain the health of human skin.
UV absorbers can be applied to fabrics through a fabric post-treatment process, such as dipping and coating, sol-gel, and microwave sputtering. For synthetic fiber (chemical fiber) and nylon fabrics, an UV absorber can be added to the processing bath when dyeing at high temperature and high pressure. This method allows UV absorber to penetrate the fabric without affecting the feel of the fabric. In other words, ideal for making high-end textiles UV-resistant.
Features & requirements
A suitable UV absorber for textiles should meet the following requirements:
- Safe and non-toxic, no allergic reaction to human body.
- Satisfy the regulation of environmental protection (green material).
- Good resistance to common solvents and daily washing.
- No staining after absorption of ultraviolet light.
- It has no negative effect on the physical properties of the fabric, such as whiteness, fastness, strength.
Our products
For example, our Omnistab UV P which is a benzotriazole and very cost-effective. It is a high efficient UV absorber with strong absorption in the range of 300-400nm. The UV P is an ideal UV absorber in Polyester and Spandex fiber, which is a chemical fiber material. Another option of a benzotriazole is the Omnistab UV 366. This product has high Molar Extinction Coefficient, which is 2.6 times of Benzophenone and 1.8 times of other benzotriazoles. It has a wide UV absorption in both UV A and UV B band. Especially effective to fibers and inhibits photo oxidation degradation in polyester fiber.
Other effective products in chemical fibers are HALS products like Omnistab LS 5519 and Omnistab LS 292. The Omnistab LS 5519 is a white crystalline powder and specially developed for Nylon applications. The Omnistab LS 292 is a light yellow liquid, suitable for water-based systems. For example, water-based textile finishing agent. Contact us for the best recommendation for your application or projects. Or for any other service you require, we will get back to you within 24 hours.
Using additives is the most common way. Darker tones tend to absorb UV rays better than lighter ones. However, with colors you need UV absorbers that will help to protect the fibers to be more UV resistant.
Unbleached cotton contains natural lignins that act as UV absorbers. For other fabrics you need chemical UV absorbers or dyes to prevent against UV rays.
UV resistance can be achieved in different ways. Black coloration is using carbon black, but other plastics usually need the use of additives such as UV absorbers and Light Stabilizers. Another way is to protect the surface with coatings, but these coatings also need UV absorbers and stabilizers to persist.
When exposed to ultra-violet radiation in sunlight, most fabrics will fade over time. We recommend the use of Omnistab UV absorbers and HALS products.
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