Is Heating Underwear Really Warm Or Pure Flicker?

Reporter investigation It is found that in addition to selling traditional thermal underwear, there are many kinds of self heating underwear on the market, and many businesses have placed them in the prominent position of the counter, attracting many consumers, especially the elderly.

In the underwear area of a large supermarket in Wangjing District of Beijing, aunt Cao is carefully reading a self heating underwear specification. The reporter saw the slogan of "the winter cold top fabric", "imported heating fiber yarn" and "self heating". A salesperson introduced to Cao Auntie: "the fabric of this underwear is newly developed this year, it can be self heating, it is light and warm."

After consulting the above instructions from the hot underwear, the reporter found that its main components are almost the same as those of ordinary thermal underwear, all of which are polyester fiber and nylon, but only one kind of fiber material called "salad" from the heated underwear. The content is 3.2%. "What is Salam?" asked the reporter. "It's a material that can burn itself." The salesperson explained to reporters that Salam can absorb sweat from human body and convert it into heat energy, and then store it in the air layer formed between fiber and material, so that the body is in a constant temperature environment to achieve warmth retention effect.

The salesperson also told reporters that since October, the sales of this self heating underwear has been very good. It has sold 6 pieces in less than 3 hours just now, most of which are bought by the elderly, because they are afraid of cold, so they need to wear underwear with good thermal performance.

The price is high and the effect of heat preservation is general.

According to the press survey, the price of the ordinary thermal underwear sold on the market is about 200 yuan per set, and the price of the underwear from heating up to 400 yuan to 500 yuan per unit. The price of the thickened type is more expensive, with a price of more than 1000 yuan per set.

What is the warm effect of self heating underwear? "There is no difference between feeling and ordinary underwear." Consumer Mr. Sun told reporters that he heard a friend introduce this underwear can own fever, feel very fresh, then spent 450 yuan to buy a set. But after wearing, it feels no different from other thermal underwear, and does not feel that it can emit heat itself, and it is not as good as ordinary warm underwear. "Salesmen say this kind of underwear can absorb sweat, but when I put on it, I found it was not the same thing at all. Sweating all over, it was wet. The wind blew and felt colder. It seems that the effect of this kind of underwear is not as good as advertised." Mr. Sun said.

With the popularity of self heating underwear, at present, besides the sale of underwear stores in supermarkets, the underwear has also been sold on the electronic business platform. Reporters in Taobao, Jingdong, shop 1 and other electronic business platform input "self heating underwear" keywords, can get multiple product information. The reporter saw in a shop selling underwear in Taobao, the monthly sales volume of its underwear is over 200. "The golden lint underwear is popular in the previous two years, and the merchant claims that it contains the gold velvet component. This year, it is fashionable to wear underwear with fever. These concepts are really dazzling." Ms. Li, who has bought the underwear from fever, told reporters that "in recent years, the underwear market is just changing the name of the product, which is not different from itself. As for advertising slogans, most businesses highlight the lightness and warmth of materials, and the number of sales depends on which brand is hyped.

　 There is no self heating material.

Does the material of heating underwear really emit heat itself? In this regard, Gong Yancheng, deputy director of the Youth Committee of China composite material society, denied. He told reporters: "at present, there is no fiber material that can heat itself. This is purely a concept of speculation in business, and is a misleading to consumers. Even if some underwear can be self heating, it is also because it uses the technology of releasing the heat released by the body itself to the human body, rather than the material itself has the function of heating.

Gong Yancheng further explained that in general, heating fibers can be converted to heat by absorbing external sources of heat. Take Salam material, which is sold by the hot underwear business as an example, contains ultrafine particles of iron, copper and other ingredients, which can store and conduct heat by releasing the heat released by the human body, so as to achieve the insulation effect, not that the material itself can generate heat. However, because of the thin texture of this underwear, its thermal insulation itself is not as good as the underwear with thick quality. Therefore, most people do not produce enough heat to supply color Rahm to absorb it, so the effect of conducting heat is not very obvious. This is also the reason why consumers feel there is no difference between heating underwear and ordinary underwear.

For businessmen claiming to be self heating underwear is a high-tech new product, Wang Yi, a dealer engaged in underwear sales for many years, said, "this is exaggerated propaganda." The concept of "self heating" of lingerie material comes from Japan. Its main components are chemical fibers or regenerated fibers. Many years ago, they were not newly developed. At present, similar products appearing on the market are only changed names, which are essentially the same.