Identify The Authenticity Of Thermal Underwear: The Thermal Insulation Rate Of Thermal Underwear>30%

In recent years, the concept war of the thermal underwear market has not subsided. In the past, it was the "card" war of carbon card, magic card, heat card and other underwear. In the first two years, it was the battle of colored cotton underwear. Although various selling points coexist in this year's thermal underwear promotion, various concept wars are still "chattering". Bamboo charcoal, Salam, Modal, Ikex, Air Velvet, Golden Velvet, Warm Velvet... These strange terms have become the promotion signs of warm underwear in shopping malls, and dazzled consumers do not know how to choose. After reading the following article, we may have some sense.

Walk into the mall or the size clothing The thermal underwear promotion booth of the store will find "group cards dancing", and the merchants still play with "concept fabrics". "What is Salam? Is it warm?" In front of a brand's thermal underwear counter, several customers held a thermal underwear to ask the salesperson. The salesperson said, "This is a new material, which can be added to the thermal underwear to ensure better thermal insulation." In some shopping malls, thermal underwear with the names of "Warm Velvet", "Exis", "Modal" and other names were also hung in a prominent position by businesses.

"It's so thin clothes Can you really keep warm? " In a foreign trade clothing store, a consumer pointed to a set of slim fitting "warm" underwear and asked the salesperson, but he got such a reply: "This is Lycra, of course it keeps warm!" "Lycra only means that the clothes are elastic, not that they will keep warm?" "As long as they are close to the body, they will keep warm!"

In sales, these thermal underwear with new names as signs are generally endowed with magical thermal effects by salesmen, and the price is tens to hundreds of yuan more expensive than ordinary cotton underwear. "Let's not say that consumers don't understand. We know only a little about these thermal insulation materials, and we can buy whatever is easy to sell. But from the price point of view, thermal underwear has entered the era of meager profits, and now we can buy two sets of underwear that used to cost two or three hundred yuan." Zhang Xiaojie, the owner of an underwear store, said frankly.

"Now new spin Fibers are emerging one after another, and the names are dazzling. Some textile fiber names even many professionals do not understand. " According to Zhao Chaofeng, deputy director of the Complaint Center of 315 Consumer Electronics Complaints Network, textile fibers can be divided into two categories: natural fibers or chemical fibers, which are almost the same in terms of warmth retention performance.

Some professionals said that the "new term" of thermal insulation materials on the market is usually that manufacturers add some chemical ingredients to the original polyester and acrylic fibers, changing the molecular structure and giving this kind of acrylic fiber and polyester a new name. The so-called "bamboo charcoal, salad, Modal and Exis" are actually just some additives, which can more or less keep warm when added to underwear. "Just like bamboo charcoal, the carbon black extracted from bamboo after high temperature treatment is added to polyester, spandex or acrylic fibers, which does have a certain warmth retention effect. But the proportion of these ingredients in underwear is not very high, and the cost performance ratio is not very high compared with the expensive price."

　　 Experts suggest that only when the heat preservation rate is more than 30% can it be called thermal underwear

In the Textile Industry Standard for Knitted Thermal Underwear, the thermal insulation rate has become an important standard to judge the quality of thermal underwear. However, few manufacturers have marked out the detailed standards of thermal underwear, only promoting with "fuzzy concept", and few consumers know the rigid indicators of thermal underwear.

"At present, the underwear market is full of fish and dragon. Many ordinary underwear are sold under the banner of thermal underwear. According to the relevant standards, underwear with a thermal insulation rate of more than 30% can be called thermal underwear. When customers buy thermal underwear, they need to see whether there is data on the thermal insulation rate on the clothes. If not, they need to directly ask the seller for a test report." Zhao Chaofeng said. He also said that air permeability and moisture permeability are also indicators to measure whether underwear is warm. In a word, the thermal insulation rate, air permeability rate and moisture permeability rate of textiles that are nominal "thermal underwear" must meet the requirements of relevant standards.

According to the industry standard of Knitted Thermal Underwear Flocks, the requirements for first-class thermal underwear are: the thermal insulation rate ≥ 45%; The air permeability (mm/s) is within the range of ≥ 180,<250 or>500, ≤ 1000; Moisture permeability (g/m2. d) ≥ 3000. The thermal underwear that meets the above three indicators is comfortable to wear.