Can Self Heating Underwear Really Give Off Heat?

Can clothes be self heating? Are their thermal effects really as magical as businessmen say?

The reporter entered "self heating underwear" key words in Taobao, and searched over twenty pages of related products.

A set of "self heating underwear" prices ranging from tens of dollars to thousands of yuan, regardless of whether the brand or the price of consumers are blurred.

The reporter contacted several online stores to ask why underwear was "self heating", and the stores all claimed that they had added "fever fiber" to their products.

Can the secret of being able to heat really lie in "heating fiber"? Hu Guoliang, Professor of materials and textile School of Zhejiang Sci-Tech University, said that some materials added to clothing can undergo phase pformation at certain temperatures, which can absorb heat or exotherm. If the heat is released during phase change, the wearer will feel warm.

However, the requirements for phase pition are relatively demanding, and the phase pition range is relatively narrow. Only in the corresponding temperature range, such as cold to a certain extent or heat to a certain extent, can the fiber work.

Moreover, the duration is relatively short. Only 10-20 minutes, the temperature of ascension can not be very high. Generally, the temperature can be increased from 2 to 4 degrees.

"At present, the common underwear in the market is basically the use of the heat released by the body itself, and then it is returned to the human body, so as to achieve the effect of keeping warm.

Professor Hu said.

In addition to all kinds of self heating underwear, the reporter also found a kind of electric heating clothing similar to electric blanket.

The lining of the thermal clothing is lined with switches, cuffs, batteries and even temperature.

Some netizens jokingly called "wrap up in the electric clothing and go out, and mother never worries about catching cold and catching cold."

Reporters in the buyer's message, a buyer said that wearing this dress in winter is not afraid to ride electric vehicles, motorcycles, but also to meet women's fashion and beautiful shape, farewell to bloated demand.

But the reporter looked at the price carefully. Like this, the use of the electric heating principle of the thermal clothing will cost thousands of yuan, which is several times or even several times higher than that of the ordinary thermal underwear.

Although the feeling of wrapping the electric blanket is a lot warmer, many consumers are also considering the safety of this product.

Fu Yaqin, Professor of materials and textile School of Zhejiang Sci-Tech University, said: "the general body safety voltage standard is 36V, even though the voltage is far below the standard, it can not exclude electromagnetic radiation hazards, especially pregnant women should avoid wearing such warm clothing.

If people wear such warm clothing for a long time, they may also cause skin dryness, itching, and excessive heat.

And in the process of washing, there may also be wire breakage, which brings security risks.

In fact, the cost of heating fiber or electric heating clothing is not high, but once the high-tech and health effects are hooked, the price may be doubled.

It is also very difficult for consumers to identify the true or false of such products, so it is best not to blindly believe in advertising campaigns.

Professor Fu said.