Sun protection clothing concept
The clothes are designed and made of the world’s top sun-resistant and quick-drying fabrics. Their characteristics meet the needs of wearing in hot summer weather, sun exposure, sweating, and high ultraviolet intensity. The clothes are moisture-wicking, quick-drying, breathable and cool, and especially have strong UV protection function. After testing by an authoritative organization, the UV protection index exceeded the national CTB/TI8832-2009 standard and was recognized as a cool sun protection garment (UV protection garment).
Definition of ultraviolet rays
The International Commission on Illumination (CIE) divides ultraviolet rays into three types: 1. UVC with a wavelength of 200-280nm; 2. UVB with a wavelength of 280-315nm; 3. UVA with a wavelength of 315-400nm. UVC ultraviolet radiation is very harmful but is basically completely absorbed by the ozone layer and does not reach the ground. UVB ultraviolet radiation is slightly weaker and is partially absorbed by the ozone layer. It accounts for 10% of the total ultraviolet rays reaching the ground, while UVA ultraviolet rays with strong penetrating power account for 10% of the total ultraviolet rays reaching the ground. Nearly 90%. As the depletion of the ozone layer exceeds the production of ozone, it is decreasing by 1-2% year by year. Scientists have discovered that ozone holes are beginning to appear over the Antarctic. Research results show that for every 1% decrease in ozone, the intensity of ultraviolet rays increases by 2%, and the incidence of skin cancer increases by 3- 4%.
The dangers of ultraviolet rays
Appropriate exposure to ultraviolet rays can enhance the human body and its ability to resist infectious diseases, promote the synthesis of vitamin D3 in the body, maintain normal calcium and phosphorus metabolism and bone growth and development, accelerate wound healing, improve immunity, and is beneficial to human health. Excessive ultraviolet rays are seriously harmful to the human body. Coupled with the decrease in ozone in the ozone layer year by year, the intensity of ultraviolet rays is getting stronger and stronger. More and more lethal UVC and UVB are reaching the ground. Ultraviolet rays will be the invisible killer of human beings. Ultraviolet radiation has further adverse effects on human health. When exposed to ultraviolet radiation for a long time, it can acutely cause erythema, peeling and increase in melanin, and gradually promote dry skin, wrinkles, sagging, dark spots and other aging characteristics. Because ultraviolet radiation can cut off the DNA molecular chain in the cell nucleus, long-term radiation will cause the broken DNA molecular chain to not be repaired in time, which will eventually lead to skin cancer, including basal cell carcinoma, phosphorous cell carcinoma and malignant melanoma. Similarly, ultraviolet rays can also induce or aggravate phototoxicity or photoallergic reactions, autoimmune diseases such as lupus erythematosus, and idiopathic photodermatoses such as polymorphous light eruption, solar urticaria, and herpes zoster. Severe ultraviolet radiation can also produce negative effects on skin immunosuppression on malignant and infectious diseases.
The necessity and importance of sun protection clothing
Strong ultraviolet rays can burn exposed skin, cause phototoxicity and photoallergy, cause skin lesions to age and evolve into skin cancer. In order to reduce the harm of ultraviolet rays to people, the cosmetics industry first developed anti-ultraviolet skin care products such as sunscreen, but some skin care products contain Heavy metal substances, coupled with the poor ventilation and poor breathing of the coated skin, have a dual impact of aggravating the burden of skin metabolism and chronic poisoning, further aggravating aging characteristics such as skin laxity, wrinkles and dark spots. Of course, sunscreen is also difficult to apply all over your body. Therefore, it is necessary and important to use textiles to protect against UV rays.
The principle of UV protection of sun protection clothing
The anti-UV principle of sun-protective clothing is that the fabric can effectively block UV rays from reaching the human skin through absorption, reflection, conversion and other methods. Textile fabrics to increase the density and thickness of the fabric or choose microfibers, special-shaped fibers, natural hemp fibers, and post-finishing to enhance the fabric’s ability to reflect ultraviolet rays or to strongly absorb ultraviolet rays and convert energy into heat or other harmless low-energy radiation. Convert energy to release or consume. The main way is usually to add inorganic coatings that have strong reflection effect on ultraviolet rays such as ZnO, TiO2, etc.; the other is ultraviolet absorbers, which absorb ultraviolet rays and convert high-energy ultraviolet rays into heat energy and harmless low-energy radiation. , such as salicylates and phenyltriazoles. Each of the above methods can be used alone, or two or more can be used in combination to enhance the UV protection function.
Chaotic market background of sun protection clothing
Whether you find sun protection clothing in physical outdoor stores, large shopping malls or JD.com, Taobao has a dazzling array of products, and business is booming. Taobao shopping malls are particularly easy to reflect sales volume. There are many stores with monthly sales of more than 10,000 pieces. Looking at online and offline sun protection clothing The price ranges from 9 yuan to 1,000 yuan per piece with free shipping. The styles, colors and materials are similar. This kind of sun protection clothing, which is light, translucent and mainly in fruit colors, is mostly woven with 15D-30D fine denier fiber, and a small part is also made of chiffon. Due to the pursuit of It is light and transparent, woven with fine denier fiber, and the fabric density is low. Some more formal brands apply anti-UV coating on the fabric, and more unknown brands even directly use ordinary light chemical fiber fabrics or chiffon fabrics. If the fabric is too thin, the density is not enough. , the gaps between fibers are large and cannot block ultraviolet rays at all. Due to inherent deficiencies, even if they are coated with an anti-UV coating, most of them cannot reach the standard UPF40+ UVA transmittance <5%. This is one of them. In addition, because polyester, nylon and other chemical fiber filaments do not absorb moisture, the fabric has poor air permeability. At noon when the intensity of ultraviolet rays is strong, the sun is exposed, the temperature is high, and you are sweating. At this time, you cannot wear it at all. These clothes also claim to be UV-resistant, and even label UPF40+ – UPF50+ to mislead and deceive consumers. Since ultraviolet rays are harmful to human health, such fraudulent behavior will cause more than just monetary losses to consumers.
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