Is sun protection shirt really useful?

In the midsummer, many sunscreen sunscreen shirts and sunscreen clothes have emerged in the clothing market. These sunscreen shirts are bright and colorful, light and soft, and feel like knitwear, and are popular among many women. On some websites, some sellers can sell thousands of products each month. Is sun protection shirt really useful?

Polyester fabrics can block ultraviolet light?

Most of these sunscreens are made of polyester. However, we carefully observed the labels on the clothes in ordinary shops, and did not specify the sun protection factors (SPF, UVA and UVB) or sun protection principles like sunscreen cosmetics and sun umbrellas. Most sunscreen shirts only labeled “100% polyester” and the price went from More than ten yuan to tens of dollars. Ask the clerk also only said: polyester can be sunscreen in some outdoor sports clothing brand counters, this year also launched a UV clothing, compared to ordinary shops in the sun clothes, these sports brands are more professional, signs are clearly marked Clothing materials, sun protection factor and other related parameters. A salesperson explained that the sunscreen works well for the clothes. Just like a sun umbrella, the upper layer is coated with a layer of sunscreen and can protect the skin during outdoor sports.

According to sunscreen standards, the cost of clothing is high. China has standardized the sunscreen products as early as possible. In 2002, China launched the “Evaluation of UV Protective Properties of Textiles” and revised it in 2011. Among them: UPF is the abbreviation of English Ultraviolet Protection Factor, namely ultraviolet protection coefficient. Only when the product's upf is greater than 30, and UVA's transmittance is less than 5%, can it be called "anti-ultraviolet product"; anti-UV products should be marked on the label with the following three aspects: 1. The standard number, namely gb/t18830;2.upf value: 30+ or ​​50+;3. The protective properties provided by this product may be reduced over long periods of use and under stretch or moisture conditions. The higher the UPF value, the better the UV protection effect. However, the highest UPF value of textiles in the national standard is 50+, which is UPF>50. Because UPF is greater than 50, the impact on the human body is completely negligible.

An industry source pointed out that the national standard for sunscreen products is a recommended, non-mandatory standard. Generally, manufacturers do not need to spend higher costs to increase special materials or use special fiber materials, nor can they specifically increase special coatings. . However, if you want to call your product "UV protection product," then you must follow this standard. In addition, since most sunscreen fabrics are based on the principle of adding additives, the fabrics may cause sunscreen performance degradation after multiple washings, but this does not violate the relevant regulations.

Sun protection clothing does not play a role in sun protection clothing or have a certain role, and some will add some chemical ingredients in the clothing materials, have a filtering effect on ultraviolet light. Special "UV protection clothing" can effectively prevent ultraviolet rays from invading the skin. Wearing a UV-resistant garment during the hot season, sweat can be quickly transferred from the skin surface to the fabric surface and dried quickly, no longer subject to sweat. The smaller the cloth gap of the clothes, the better the function of isolating and blocking ultraviolet rays, and it must have a certain thickness, and the light and thin material will not achieve much effect.

To achieve good sun protection in the summer, try not to stay outdoors for a long time. The best sun protection sunscreen is traditional long-sleeved trousers, sunscreen and sun umbrellas. In addition, summer can also pay attention to eat less sensitive food (cauliflower, celery, leeks, fennel, etc.), eat more vegetables and foods rich in vitamin B, but also help reduce the damage of ultraviolet radiation on the body. As for drying up the sun, go home and do simple skin cleansing and replenishment. You don't have to do excessive so-called after-sun care because our skin has the ability to repair itself and don't increase its burden too much.