How to tell if the sun umbrella is protected against ultraviolet rays? How to tell if the sun umbrella has UV function? How to buy a sun umbrella? Girls all know how much ultraviolet rays damage the skin, so they must have a sun umbrella when they go out. But is our umbrella effective against UV rays? The following editors will introduce to you how to distinguish whether a sun umbrella can prevent ultraviolet rays, and tips for buying a sun umbrella.
Why are sun umbrellas protected against ultraviolet rays?
The sun umbrella can block about 70 ultraviolet rays, but it cannot cut off the reflected ultraviolet rays. If there is no anti-ultraviolet coating umbrella, ordinary sun umbrellas can also be used. The defense effect of black umbrella is relatively good, followed by pink, goose yellow, and red has almost no ultraviolet protection function.
What are the umbrella sizes? The umbrella sizes are generally 48 inches, 52 inches, 54 inches, 56 inches, 60 inches, etc. Of which 48 inches are regular sizes. The 48-inch sun umbrella can open up to 2.4 meters, and we choose the sun umbrella according to our own actual needs to determine the size of the sun.
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1. The anti-ultraviolet performance test of the fabric fiber itself proves that among the untreated fibers, the anti-ultraviolet performance of the polyester fiber is the best. The benzene ring in the molecular structure of the polyester fiber has the effect of absorbing ultraviolet rays, chemical The nylon in the fiber is also the rayon, rayon, etc. in nylon glue, which has UV resistance but is not as good as polyester. Therefore, the raw materials of the umbrella make it have the function of anti-ultraviolet.
2. The structure of the fabric The thickness and tightness of the fabric have a certain influence on its anti-ultraviolet performance. The thicker the fabric, the better the anti-ultraviolet performance, and the tighter the fabric, the stronger the light blocking ability, and the smaller the ultraviolet transmission.
3. The color of the fabric According to the test results of the Chinese Academy of Metrology, the color of the fabric also plays a role in blocking ultraviolet rays. The deeper, the smaller the UV transmittance, the better the UV protection performance. Generally dark umbrella cloth can block 95% of UVA. Under the same conditions, the darker the fabric, the better the UV resistance. In contrast, black, navy blue, dark green, light blue, light pink, and light yellow have good anti-UV effects.
For more information, please pay attention to China Umbrella Industry Network () Umbrella customization, umbrella investment, umbrella enterprise
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