In this cold winter, body insulation is essential, and some friends like to use warm treasures and warm stickers to keep warm. Warm patches can keep warm, warm the uterus and stomach, warm shoulders and back, warm hands and feet, quickly warm warm compresses, relieve all kinds of pain, and promote blood circulation. Because of its convenient and fast characteristics, it has become one of the essential artifacts for many people to heat in winter. What are the ingredients and how do they heat up when they are "both demeanor and temperature"?
The core heating substances of Nuanbao and Nuanbao are the most common things in our lives, mainly iron powder, activated carbon, water and salts (sodium chloride). Its heating principle is that the iron powder and air in Nuanbao undergo an oxidation reaction to produce heat. (Iron powder will continue to release a large amount of heat energy during the oxidation reaction, which is the three chemical reaction equations of high school chemistry.) ）：
2Fe+O2=2FeO+Q (heat).
6feo + o2 = 2fe3o4 + q (heat).
4Fe3O4+O2=6Fe2O3+Q (calories).
In order to allow the temperature to last longer, the mineral material expanded vermiculite is used to keep warm. Vermiculite is a super thermal insulation material, adding vermiculite powder to the warm treasure and warm paste can prolong the heating time of the warm baby and continue to keep warm, so as to have a better warmth effect.
We learned that the main ingredients in Nuanbao are iron powder, vermiculite, activated carbon, inorganic salt, water, etc., and water and salt are used to accelerate the oxidation of iron powder to produce heat. The vermiculite used in Nuanbao and Nuanbao is an iron-magnesia aluminosilicate mineral, which is named because it can expand rapidly when heated and bends into a leech-like shape. It is generally brownish, brownish-yellow or dark green in color, with a greasy glass sheen. After high-temperature roasting, the volume expands dramatically and the weight is reduced. Vermiculite will become silvery-white or golden-yellow after expansion, with an average bulk density of 100 200kg m3. Because the vermiculite that has been roasted and expanded has a fine air barrier, it has good thermal insulation performance. Vermiculite has a very good thermal insulation effect, and is the world's premier super thermal insulation material, which has many applications in industry and agriculture, and is a good thermal and sound insulation material. Vermiculite is very safe, it does not produce harmful substances to the human body, and can be used with confidence.
When the warm baby emits heat, the heat generated locally will be transferred to the skin and blood in the corresponding position through heat conduction, and then through the blood circulation, the heat will be transferred to all parts of the body. The baby can be attached to the shoulders, abdomen, back, waist, stomach and related joints of the human body. However, it should be noted that the maximum temperature of the warm paste is 66 °C, and the heat continues to be heated for 12 hours, it is strictly forbidden to stick it directly on the **, diabetics, children, and the elderly should be cautious. In addition, because the warm paste contains activated carbon, it can be placed in shoes, wardrobe or newly renovated room to remove odors after use. Finally, it can also be cut and used as flower fertilizer, and vermiculite itself can be used for gardening and raising flowers, which can be regarded as waste utilization. I hope you can correctly choose and use regular, brand Nuanbao products to bring you a warm and happy winter.