What is the most important thing in sunscreen fabrics

What is the most important thing in sunscreen fabrics? Good sunscreen fabrics can not only protect against ultraviolet rays, but also can quickly guide sweat to the surface of the fabric and dry quickly; while inferior fabrics are hygroscopic and have poor breathability, which can make people feel uncomfortable and even cover up prickly heat after wearing them for a long time. Regular fabrics provide better sun protection than any sunscreen, and sunscreen fabrics provide better sun protection than regular fabrics. However, the sun protection effect of fabrics with sunscreen additives will be reduced after multiple washings.
In ordinary fabrics, in terms of color, the darker the color, the higher the UV protection performance, such as black; in terms of texture, among chemical fibers, polyester is better than nylon, and nylon is better than rayon and silk.
In the chemical laboratory, the sunscreen clothing of each fabric is tested, mainly testing the transmittance of 290-400 nm ultraviolet rays. The experimental results: the transmittance of 310 nm ultraviolet rays is 19% of celestial silk, 12.4% of nylon, and 9% of pure cotton. %, DuPont rainproof fabric 8.3%, metal wire cloth 5.3%, the smaller the transmittance, the better the sunscreen effect.

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