The coolness of autumn is gradually coming. In the cold winter, thermal underwear is a magical tool to keep out the cold. In recent years, many thermal underwear have added self-heating function. This black technology can make the clothing itself heat up and provide warmth for the human body.

Some self-heating underwear has the function of absorbing moisture and generating heat. It is made of absorbing moisture and generating heat material and is a thermal insulation underwear that meets the standard temperature rise value index requirements.

With so many thermal underwear on the market, how do we determine whether the thermal underwear has the ability to absorb moisture and generate heat?

The process of testing the intrinsic quality moisture absorption and heat temperature rise value is as follows:

1. Prepare three groups of samples according to the test requirements;

2. Put the combined sample and the weighing bottle with the lid opened into the oven, set the corresponding time and temperature for drying according to the standard requirements, and after drying for a certain period of time, quickly put the sample into the weighing bottle, cover the weighing bottle tightly, and put it into a sealed desiccator. Place it in the required constant temperature and humidity environment for 1 hour.

3. Place the three samples in a Temperature & Humidity Test Chamber set at 20±0.5℃ and (90±3)% relative humidity, conduct the test, and record the temperature rise changes of the combined sample.

4. After the 30-minute test is completed, read the highest temperature rise values of the three combined samples respectively. At the same time point, the temperature rise value of the combined sample is the average of the temperature rise values of the three combined samples as the result.

The application of moisture-absorbing and heat-generating technology in the thermal insulation performance of clothing has brought good news to people's cold protection.

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