The function of anti-UV fabric, the principle of UV protection, and the standard of UV protection
The function of anti-UV fabric, the principle of UV protection, and the standard of UV protection
The principle of anti-UV fabric is to use the UV absorber mixed into the fabric to absorb high-energy UV rays and convert them into low-energy heat energy or wavelengths. Shorter electromagnetic waves, thereby eliminating the harm of ultraviolet rays to the human body and fabrics. The use of ultraviolet reflectors can increase the reflection and scattering of ultraviolet rays by fabrics and prevent them from penetrating through the fabrics. It has the properties of heatstroke prevention, heat insulation and cool touch.
The unit of ultraviolet sun protection is the UPF value, and the method of calculating the ultraviolet protection function is; UPF = small exposure amount that produces erythema when the skin is not protected/ erythema occurs when the skin is protected Small exposure, that is, when you wear this piece of clothing, you can withstand several times the sun exposure time.
It should be noted that national standards stipulate that fabrics with UPF5% cannot be called anti-UV fabric products.
Anti-UV clothing fabrics include cotton, linen, silk, wool, chemical fiber and other fabrics. Some anti-UV fabrics that have been processed by better processes are suitable for Ultraviolet rays in the 180-400nm band (especially UV-A and UV-B) have good absorption, conversion, reflection and scattering effects. The finished fabric is non-toxic, non-irritating to the skin, and the human body will not produce allergic reactions. At the same time, it does not affect the coloration and moisture absorption and breathability of the fabric. Good anti-UV fabric pair 100-400cm has good absorption of ultraviolet rays in the band, especially UV-A and UV-B , the ultraviolet transmittance is still less than 1% after 50 washes, and the ultraviolet blocking factor UPF can reach a high level of 50+.
The excerpt of this article is [China UV Protection Fabric Networkwww.texuv.com】Please indicate when reprinting.
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