How do parasols protect against ultraviolet rays

Generally speaking, the right amount of ultraviolet radiation has the bactericidal effect and can increase the synthesis of vitamin D, which is helpful to the health of the human body. However, under the scorching sun, the human skin will lose its ability to resist, and it is prone to burns, showing erythema or blisters. Excessive ultraviolet radiation can also induce skin diseases (such as dermatitis, xeroderma pigmentosum), and even skin cancer, enhance the innate cataract and reduce the body's immune function. Some materials show that every 1% of the ozone layer is eliminated, the intensity of ultraviolet radiation will increase by 2%, and the possibility of skin cancer will increase by 3%.
Therefore, in order to protect the human body from excessive ultraviolet radiation, it is imperative for textiles to prevent ultraviolet radiation. Textile anti-ultraviolet radiation pick-up mechanism The textile anti-ultraviolet radiation pick-up mechanism is to apply a kind of energy to the textile and, or have a fierce and selective reception of ultraviolet rays, and can perform energy changes, using heat or other harmless low-energy radiation to reduce the energy Items released or consumed. The textiles after applying these items have no adverse effects on the wearability of the fabrics, and reach the application request.
The anti-ultraviolet radiation pick-up of textiles is similar to the light stability of polymers. Light resistance is the maintenance of polymer compounds and the protection of active oxidation caused by ultraviolet radiation, which leads to polymer degradation and changes in surface and structural properties; while anti-ultraviolet radiation pick-up is to protect the human body from damage caused by excessive ultraviolet radiation. From the perspective of optics, when light hits an object, a part of it is curved on the outside, a part is received by the object, and the other part is transmitted through the object. However, the fabric picked up by anti-ultraviolet radiation, the light hits the fabric, and a part of the fabric passes through the gaps in the fabric. The ultraviolet barrier on the fabric either selectively receives ultraviolet rays or selectively receives and converts its energy into low energy. Release, causing the ultraviolet rays to be covered.