Different materials have different effects, black polyester color glue wins
Experts remind that rain and wrinkles will affect the sun protection effect
â–¡ Reporter Zhu Ping Intern Tong Yalu
As summer comes, female friends who are keen on whitening will have to worry about how to protect themselves from the sun. At the end of the street, the umbrellas began to "return to the rivers and lakes" and "dominate one side".
Most of the umbrellas on the market advertise various UV protection functions, and the prices and styles are very different. Can you really protect yourself from the sun by holding a parasol?
NO! If you choose the wrong parasol, you will not be able to make "white and beautiful" this summer. What kind of umbrella can really achieve sun protection? How is the sun protection effect of different materials of parasols? Let us use experiments to uncover the secrets of parasols.
Umbrella sun protection experiment PK
Different materials have different effects, black polyester color glue wins
Experts remind that rain and wrinkles will affect the sun protection effect
Experimental test
There are many types of parasols on the market now, there are sunscreens, double-layers, triple-layers, and those with UPF50 or more (UPF is the sunscreen index of parasols, similar to SPF of sunscreens), and some even have "cooling down" prompt. The more data, the easier it is for people to see. What kind of parasol can better protect against ultraviolet rays?
In order to find out, recently, the reporter came to the laboratory of Hangzhou Paradise Umbrella Industry Group Co., Ltd. to follow the staff and use professional equipment to detect how many ultraviolet rays different shades can block and how strong the protection is.
Experimental Materials:
Umbrella No. 1 (imported brand with green coating inside and pink outer layer)
Umbrella No. 2 (silver rubber inner layer, dark green outer layer)
Umbrella 3 (embroidered umbrella, no special coating)
Umbrella No. 4 (Chameleon Material)
Umbrella No. 5 (impact with vinyl)
Umbrella No. 6 (black polyester colored plastic)
Umbrella 7 (Silver plastic coating)
experiment procedure:
With the help of laboratory professionals, 7 umbrella surfaces of different materials were placed on the UV scattering transmission analyzer in order to perform UPF, UVA and other index tests.
According to the provisions of the latest edition of the national standard "Assessment of UV Protection Performance of Textiles", UPF (ultraviolet protection coefficient value)> 40, and UVA (long wave ultraviolet) transmission rate <5%, can be called UV protection products.
Experimental results:
UPF (ultraviolet protection factor): In addition to the test value of No. 3 umbrella (embroidered umbrella, no special coating) is 14.4, which is far lower than the national standard of 40, there is no protection effect, the remaining 6 umbrellas are all qualified.
Among them, the test value of No. 5 umbrella (impact vinyl) and No. 6 umbrella (black polyester colored plastic) reached 500, the highest protection factor; No. 7 umbrella (silver adhesive coating) was 492.44, the protection factor ranked second ; The value of No. 1 umbrella (imported brand, with green coating inside and pink outer layer) is 195.29, and the protection factor ranks sixth.
UVA (Long Wave Black Spot Effect Ultraviolet): Similarly, the test value of Umbrella 3 (embroidered umbrella, without special coating) is 20.16%, which is much higher than 5% of the national standard, there is no protective effect, the remaining 6 umbrellas The quality is qualified.
The No. 6 umbrella made of black polyester colored plastic has the most amazing performance. The test value is 0.00%, which can almost achieve 100% blocking UVA. The No. 5 umbrella hitting the black material also performs well, with a value of 0.01%, close to perfect. Umbrella No. 1 has a value of 3.33% and the protection power is sixth.
Expert Reviews:
Zhang Lili, director of Paradise Umbrella Laboratory, reminded consumers to check whether the inner skeleton of the umbrella has a certificate when purchasing a parasol. Only the label shows UPF> 40 and UVA <5% to show that this umbrella is really protective. UV function.
"The label has the national standard number (GB / T 18830-2009), UPF, UVA transmittance, as well as the manufacturer's name, address, product quality inspection certificate, production date, etc. The quality of the products with complete marks is relatively guaranteed. "Zhang Lili said," Beware of ordinary umbrellas and fake UV protection umbrellas, it is more reliable to choose brand-name products. "
Choose a parasol to see four points
Color, coating, UPF, material
Experiments show that the sun protection effect of sunshade umbrellas with different coatings is very different.
The experimenter said that there are tips for choosing a parasol, mainly based on four points-color, coating, UPF, material.
First of all, the quality of light transmission is a major criterion for testing sunshades. The darker the color of the umbrella, the lower the light transmittance, and the better its ability to resist ultraviolet rays. Black sunshades have the best sun protection.
Second, look at the coating. When choosing a parasol, first look at the coating. This serves to reflect light. Currently the most popular is the black plastic parasol, which has a higher sun protection index than other coatings.
Third, look at the UPF value. Only umbrellas marked "UPF> 40, UVA <5%" on the certificate can really protect against ultraviolet rays. Fourth, look at the tightness of the fabric. The tightness of the umbrella fabric is another important factor affecting the ultraviolet resistance of the umbrella. The tighter the fabric, the poorer the light transmission and the better the UV protection.
Buyers can choose by two intuitive methods: first, observe the umbrella cloth spread out against the light, the weaker the light, the tighter the fabric; second, look at the gloss, the umbrella surface has a satin gloss, and the better the gloss is, the better The tighter the better.
In general, cotton, silk, nylon, viscose, etc. have poor UV protection, while polyester is better.
In addition, when purchasing and using a parasol, it should also be noted that the ultraviolet protection effect of the parasol is not related to the price, the price is high, and the gimmick does not mean that the sunscreen effect of the parasol is good. The price is mainly determined by the umbrella bone material and style Secondly, in the external environment of our activities, ultraviolet rays are radiated to the human body from all angles, so the umbrella surface should be large or small, if you can apply sunscreen, wear UV-resistant clothing, etc., you can play a role in the body Better multi-directional protection.
1. Umbrellas should not be used as umbrellas
Umbrellas are mainly made of polyester and nylon materials covered with anti-ultraviolet coatings, and also have a certain waterproof function, but it is not recommended to use it as an umbrella all year round.
If the sunshade of good quality is used for rain protection for a long time, because of the influence of acid and alkaline substances in the rainwater, the coating may be aged and reduce the sunscreen quality of the umbrella; while the sunshade of poor quality, during heavy rain, Because the sunscreen coating is not handled properly, it is likely that the sunscreen coating will be destroyed.
The experimenter suggested that usually prepare two umbrellas, one for sun protection and one for rain.
2. Do not brush the umbrella surface with a brush
After using it for a period of time, it is best to rinse the umbrella surface with clean water and open it to dry before storing. If there is a stain on the umbrella surface, it is best to wipe it clean with a sponge or soft cloth dipped in clean water or a neutral lotion, instead of using a brush.
After you accidentally get dirty, you must wipe it in time. Do not wait for a long time to wipe it. This is not easy to clean, it is also not conducive to the maintenance of the umbrella, and will shorten the life of the umbrella. But do not wash too often.
3. Cool after drying
After cleaning and drying, the sunshade needs to be cooled at room temperature for a while and then put away. It is not appropriate to put it away in the sun, so it is easy to make the umbrella surface aging, brittle and perishable. And be careful not to expose to the sun as much as possible.
4. Avoid touching the umbrella surface with sharp objects
After use, please stretch out the umbrella surface and wrap it with an umbrella cover. Avoid heavy pressure when storing, so as not to damage the umbrella bone. Do not use it forcibly in strong winds to avoid fracture of the middle bone and branch. Once the umbrella bone breaks, please stop using it immediately to avoid scratching the umbrella surface and give it to a professional for repair.
Umbrella daily maintenance
Experiments teach you tips for buying umbrellas
For more information, please pay attention to China Umbrella Industry Network () Umbrella customization, umbrella investment, umbrella enterprise
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