Experiments Prove That "Thin Warm" Underwear Is Not Reliable.

< p > weather warming, "self heating" warm keeping < a href= "//www.sjfzxm.com/news/index_f.asp" > underwear < /a > hot selling in the market.

This "thin warm underwear" claims that the fabric can be "self heating" and is much thinner than the bulky ordinary thermal underwear, attracting many consumers' eyeballs.

However, some readers have sent a hotline to the morning post laboratory column to doubt the effect of "self heating" of underwear.

"Self heating" underwear is high-tech or factory gimmick? 10, a group of experiments was conducted by reporters. It was found that the so-called "self heating" underwear did not enhance the temperature of the object. Because of its thin thickness, the thermal insulation properties of these "thin warm" underwear are not like ordinary cotton underwear.

< /p >

< p > < strong > investigation < /strong > < /p >

< p > < strong > "self heating" underwear sells fire < /strong > < /p >.

< p > reporter survey found that whether big shopping mall or online shop, labeled "self heating", "salad" and other labels warm underwear sells the most.

In a famous brand shop, the monthly sales volume of a woman's thermal insulation underwear is more than 200.

These "self heating" thermal underwear claims to have two advantages over ordinary thermal underwear: one is "warm", the other is "thin".

The so-called "thin warm".

< /p >

< p > the sales service of a Taobao shop recommends a thin underwear for heating to reporters.

"This is high-tech, the main ingredient is heating fiber, do not look thin, put on it is light and warm."

But for its heating principle, sales customer service is very vague, but it will feel warmer than ordinary underwear.

In the instructions of this underwear, the function of "fever" is explained: "the fiber itself absorbs the water vapor emitted by the body and pforms it into heat energy, so that the material itself becomes warmer."

Besides, this underwear also has the functions of thermal insulation, moisture retention and antistatic.

< /p >

< p > Mr. Zhang bought 3 sets of such thermal underwear.

"It is really thin, very light, and the fabric is very comfortable. It seems to be really feverish.

But if you encounter a strong wind, it will be hard to say.

Zhang said that the fabric of this underwear is "heating fiber" and does not contain cotton ingredients.

< /p >

< p > < strong > experiment < /strong > < /p >.

< p > < strong > wrapped hot water to see insulation condition < /strong > < /p >.

Does "P" self heating underwear really heat? "Which underwear is more warm than underwear"? A group of experiments were conducted.

< /p >

< p > reporters have found three famous brands of underwear with different materials, namely, self heated underwear, cotton underwear and flannel thickened underwear this year.

After measurement, the reporter found that "self heating" underwear single layer thickness is about 0.5 millimeters, pure cotton underwear is about 0.8 millimeters, and velvet thickened underwear is about 1.5 millimeters.

The three underwear feels soft.

< /p >

< p > the reporter then prepared four identical models of triangular bottles.

Each triangle bottle contains 51 MH of hot water 200 milliliters.

Then three of the beaker were stuffed into three kinds of underwear. The bottle wall was wrapped with a layer of < a target= "_blank" href= "//www.sjfzxm.com/" > clothes < /a >, and 3 layers of clothes were wrapped in the bottle mouth.

Fourth beaker do not wrap anything.

Then put four beaker together on the white coat.

At this time, the indoor temperature is 25 degrees.

< /p >

< p > 30 minutes later, the reporters measured the temperature of four triangular bottles of water respectively.

A thermometer with a minimum calibration temperature of 1 degrees is used in the measurement.

After measurement, the water temperature of the unwrapped triangular bottle is 39.5 degrees, the water temperature of the underwear from "self heating" falls to 43.5 degrees Celsius, the water temperature of the cotton underwear is reduced to 43.5 degrees, and the water temperature of the underwear is increased to 44 degrees Celsius.

< /p >

< p > < strong > conclusion < /strong > < /p >.

< p > < strong > no underwear was found to be "self heating" < /strong > < /p >.

< p > it can be seen that these three self heating underwear, pure cotton underwear and flannel thickened underwear have played a role of thermal insulation in the experiment.

But in contrast, the "self - heating" underwear has no "fever", and its warming effect is no better than ordinary cotton underwear and cashmere undergarments.

< /p >

< p > < strong > expert < /strong > /p >

< p > < strong > "fever" is not heated, "thin warm" is difficult to have both < /strong > < /p >.

< p > an industry insider said that the "warm" effect claimed by thermal underwear is actually insulation.

Velvet underwear and cotton underwear rely on thickness and warmth. The thicker the material is, the better the warmth retention effect is.

Because of the large gap of fiber, the air layer in the clothing has thermal insulation effect, thereby preventing heat loss.

The so-called "self heating" underwear, its principle is mainly to use the heat released by the body itself, and then return it to the human body.

She said that this kind of fabric has appeared several years ago and is widely used in the field of thermal underwear. "Salad" is a more common one.

< /p >

< p > "salad", also known as far-infrared radiation acrylic fiber, is a kind of silk material that twists the far-infrared radiation ceramics into acrylic fiber by advanced injection technology. This kind of underwear can reflect the heat generated by the human body through underwear, so as to achieve the effect of keeping warm.

According to the industry, this kind of underwear has better thermal insulation than ordinary fabric underwear at the same thickness. However, because this underwear is thin, its thermal effect is limited.

This is why Mr. Zhang said that when he was windy, he felt "self heating" underwear was not warm.

This kind of "thin warm" underwear is hard to keep warm in the cold winter.

< /p >

< p > the industry said that the commonly used "Salam" and polyester fiber materials for thermal underwear are chemical a href= "//www.sjfzxm.com/news/index_s.asp" > fiber < /a >.

She said that wearing chemical fiber fabrics will have some discomfort, so some manufacturers will do some anti static treatment, or even moisturizing effect to ensure comfort.

But the price of such thermal underwear will also be high.

< /p >