What is the principle of anti-UV fabric to protect against UV rays
The principle of anti-UV fabric is to use the ultraviolet absorber mixed into the fabric to absorb high-energy ultraviolet rays and convert them into low-energy heat energy or electromagnetic waves with shorter wavelengths, 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 the fabric. It has the properties of heatstroke prevention, heat insulation and cool touch.
It should be noted that national standards stipulate that fabrics with UPF5% cannot be called anti-UV fabric products.
UV sunscreen unit is UPF value, and the method of calculating ultraviolet -resistant functions is; UPF = Skin generates erythema and small photos under protection/Skin is protected. You can withstand several times the sun exposure while wearing this garment.
UV clothing fabrics include fabrics such as cotton, hemp, silk, hair, chemical fiber, etc. Some of the UV fabrics compiled by better process pair of ultraviolet rays (especially UV-A and UV-UV- B) It has good absorption, transformation, reflection and scattering effects. The finished fabric is non-toxic, non-irritating to the skin, will not cause allergic reactions in the human body, and does not affect the coloring and moisture absorption and breathability of the fabric. Good anti-UV fabrics have good absorption effects on ultraviolet rays in the 100-400cm band, especially UV-A and UV-B. After 50 washes, the ultraviolet transmittance is still less than 1%, and the ultraviolet blocking factor UPF can reach 50 +High level.
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