The arrival of summer is a problem for most girls. How to keep getting dark, everyone is armed, all kinds of sunscreen and skin care have come out, but they can't hide from shopping outdoors. Still need to have a UV umbrella that can achieve UV protection. Although it is impossible to prevent the darkening, you can resist as much as you can. A small experiment to show what kind of UV umbrella has UV protection function

Comparing the performance of various sun umbrellas on the market

       Facing the dazzling array of sun umbrellas on the market, how should we choose the right one? Considering practicality, we will conduct experimental comparisons from four aspects: lightness, heat insulation, wind resistance and sun protection. Our experimental subjects are the following 4 kinds of umbrellas that are common in the market and are the most selected by everyone.

Experiment competition
      Experiment 1: Portability Competition
      After testing, single-layer umbrella cloth with black sunscreen coating on the inside, weighing 298 grams; black sunscreen coating on the outside and patterned umbrella on the inside, weighing 216 grams; double-layer umbrella cloth with black sunscreen coating on the inside Umbrella weighs 317 grams; traditional umbrella weighs 400 grams. Therefore, in this round, the parasol with the black sunscreen coating on the outside of sample four is the lightest.

      Experiment 2: Thermal insulation performance competition
      We all know that the sun umbrella must have a certain thermal insulation capacity, and the temperature under the umbrella should be lower than that outside the umbrella, and the lower the better. So which one of these four umbrellas has good heat insulation performance? We used a piece of fresh pork as the experimental object.
      The temperature of the meat before the experiment was 26 degrees Celsius. Let's see what happens to the temperature of the meat after being covered by the four umbrellas. After experimenting for 10 minutes in turn, we found that the double-layer umbrella of the sun umbrella has almost no rise in temperature and better heat insulation performance.

      Experiment 3: Wind resistance competition
      The reporters came to the wind tunnel laboratory with their respective umbrellas. Here, their sun umbrellas will experience the "damage" of strong winds of 6-8! The test results show that the traditional umbrella is very strong, the umbrella frame is made of all-steel, and the umbrella has 10 ribs. It is still strong in the face of 8 strong winds, so it has good wind resistance.
      The other umbrella frames are made of composite carbon fiber material and aluminum. Although the material is tough, it is easy to deform. In this round of competition, the best performance is the traditional umbrella, which has the best wind resistance.

      Experiment 4: Anti-UV competition
      The reporter went to the National Quality Inspection Center for Textiles, Apparel and Apparel Products to test the anti-ultraviolet performance of the four umbrellas through an ultraviolet tester. The test results show that the UV protection UPF value of traditional umbrellas is 32. The UPF values of the remaining three umbrellas are all greater than 50. Therefore, in terms of anti-ultraviolet performance, traditional umbrellas are not good.

How to choose a high-quality sun umbrella

According to experts, generally speaking, under the same conditions
1. The anti-ultraviolet effect of dark-colored fabric is relatively better than that of light-colored fabric, because its ultraviolet absorption effect is better.
2. The sun protection effect of double-layer fabrics is better than that of single-layer fabrics. There are two main types of anti-ultraviolet finishing processes.

The first is to add the anti-ultraviolet finishing agent polyester fiber when preparing the fiber, and the made fiber itself has an anti-ultraviolet effect. The second is to carry out anti-ultraviolet coating finishing after the fabric is manufactured, and achieve anti-ultraviolet effect through the overall process.

Experts recommend
When choosing a sun protection umbrella, if you are most interested in sun protection and do not consider other things, then choose a double-layer umbrella cloth umbrella; if you consider all aspects of sun protection, wind resistance, heat insulation, and lightness, it is recommended to choose deep The umbrella is made of colored polyester fiber fabric, with sun protection coating, and the umbrella frame is made of aluminum or fiberglass.

Does rain affect sun protection?

——Environmental pollution, rain is acidic and will destroy the coating
——Actually, it doesn’t matter if you use a sun umbrella to cover the rain occasionally, but if you often use a sun umbrella to cover the rain, it won’t work. And the coating has a shelf life, generally it should be replaced after two summers. Therefore, if you want to have a good sun protection effect, you cannot use an umbrella for many years, and you should pay attention when buying it. According to national regulations, regular brand umbrellas will require the corresponding sun protection index and material fabric to be indicated on each umbrella. Everyone should pay attention to it!
——When buying a sun protection umbrella, the bigger the umbrella, the better. Don't use an umbrella as a sun protection umbrella, and it is best not to use a sun protection umbrella to cover the rain!

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