Polyester UV resistant materials are mainly used in various outdoor textiles, such as: snack bar umbrellas, scenic spot umbrella, beach cover Parasol, villa leisure umbrella, etcAnd these umbrellas, also known as sun umbrellas, are mainly used to protect against direct sunlight. When you buy an umbrella, you should pay attention to whether there is a label in the umbrella indicating that the umbrella is UV resistant, that is to say, the umbrella can really prevent ultraviolet radiation The general umbrella can't resist ultraviolet rays. Of course, there are also dual-purpose umbrellas with rain and UV resistance on the market. usually The label will be sewn on the inside of the frame in the sunshade, or the anti UV effect will be indicated on the price tag. When choosing a sunshade, you should refer to the following eight points:
1、 When choosing the umbrella surface, the UV resistance performance of the umbrella with obviously sparse fabric is generally poor, so consumers should buy it carefully.
2、 The color of the fabric is related to the UV protection. Under the same conditions, the darker the color, the better the UV resistance, In contrast, black, navy blue, dark green have better UV resistance than light blue, light pink and light yellow.
3、 Due to the shrinkage of the fabric, the umbrella surface should be large rather than small when purchasing sunshade.
4、 Choose brand products, beware of ordinary umbrellas and fake anti ultraviolet umbrellas.
5、 Before purchase, you should carefully check the protection grade mark. Regulations on Evaluation of anti ultraviolet performance of textiles issued by AQSIQ Only when the UPF is greater than 30 and the UVA transmittance is less than 5%, the It can be called anti ultraviolet product, and the protection grade standard is "upf30"; when the UPF is greater than 50, it indicates that the product has UV protection The performance is excellent, and the protection grade mark is "UPF50". Consumers in the purchase, should carefully check the protection level logo, and then root Choose your own umbrella according to the local sun condition.
6、 When the umbrella surface is wet, due to the optical transmission of water, the ultraviolet transmittance increases and the protective effect decreases. because The wet umbrella is not suitable for UV protection.
7、 Whether the sunscreen umbrella can prevent ultraviolet rays, the fabric texture is not more important, the main manufacturers are what kind of cloth
Technical treatment. General cotton, hemp fabric itself has a certain anti ultraviolet performance, but the degree is not strong. The first two years Most sunscreen umbrellas sold on the market are coated with a layer of silver glue, which can reflect and block some ultraviolet rays Shoot. But the quality of silver glue has good and bad. The silver glue produced by manufacturers with good technical conditions is not easy to fall off, and some are cheap
In order to make up the number, the sun just painted a layer of silver on the surface of the umbrella. After several times of sunshine, the color dropped.
