When buying umbrellas, notice whether there is a label in the umbrella that this umbrella is anti-UV, that is, this umbrella really can protect against ultraviolet rays (the umbrella is not in fact resistant to ultraviolet rays). Of course, there are also selling both the rain and anti-UV dual-use umbrella. Usually the bidding seam in the umbrella by the inside of the skeleton, or in its price tag on the label has a UV-resistant effect.
Umbrellas should be referenced when choosing an umbrella
1. In the selection of the umbrella surface, fabric textile Obviously sparse umbrella anti-ultraviolet performance is generally poor, consumers buy carefully.
2. Fabric due to the characteristics of shrinkage, the purchase of umbrellas, the umbrella should be large and small.
3. The color of the fabric is related to the UV protection performance. Under the same conditions, the darker the color of the fabric anti-ultraviolet performance better, in contrast, black, Tibetan cyan, dark green lighter blue, light pink, light yellow and other UV-resistant performance is better.
4, before the purchase should be carefully inspected the protection grade mark. The State Administration of quality control promulgated the "Textile Anti-ultraviolet Performance evaluation" provisions, only UPF (UV protection coefficient value) is greater than 30, and UVA (UVA) transmittance is less than 5%, can be called Anti-ultraviolet products, protection level standard is "upf30+"; when UPF is greater than 50 o'clock, the UV protection performance of the product is excellent, the protection level is identified as "upf50+". Consumers in the purchase, should carefully check the protection level identification, and then according to local sun conditions, to buy their own umbrellas.
5, choose brand-name products, beware of ordinary umbrella fake anti-UV umbrella.
6, according to the fabric properties of the umbrella surface to determine the UV-proof performance. Generally speaking, cotton, silk, nylon, viscose and other UV-resistant performance is poor, and polyester better. Usually used to make umbrellas containing polyester fabric color Dimboa, MACBU and so on. In addition, anti-ultraviolet performance to satin fabric best, the following in turn is twill, plain, the darker the better.
7, sunscreen can prevent ultraviolet, fabric texture is not the most important, the main manufacturers are the fabric to do what kind of technical treatment. General cotton, hemp texture of the cloth itself has a certain degree of anti-ultraviolet performance, but not a strong. The first two years of the market on the sale of sunscreen umbrella is a layer of silver coated on the umbrella, such treatment can reflect and block some ultraviolet rays direct. But the quality of silver glue has a good and bad, technical conditions good manufacturers to produce sun-resistant umbrella Silver gum is not easy to fall off, and some cheap sun-proof umbrella for the sake of fraud, just to the umbrella surface coated with a layer of silver, after several sunshine after the loss of color.
8. Under the condition of wet, the transmittance of the ultraviolet rays increases and the protective effect is reduced due to the optical conduction effect of the water. Therefore, wet umbrella is not suitable for UV protection.