The hot patch uses the heat released by the iron oxidation reaction to generate heat. In fact, it is based on the principle that iron absorbs oxygen and corrodes in humid air. At the same time, the strong adsorption property of activated carbon is used to store water vapor in the loose structure of activated carbon, and the water vapor is liquefied into water droplets.
The outgoing stream comes into contact with air and iron powder and reacts relatively quickly under the catalytic action of sodium chloride to generate iron hydroxide, releasing heat. The reaction rate of iron oxidation under natural conditions is slow. If you can speed up this reaction, you can try increasing the surface area of the iron.
Use water, salt and activated carbon to form a primary battery to promote the reaction, and you can get the temperature required by the heating bag andbecome the heat source of the heating bag. The raw material layer in the hot patch can release heat continuously within 12-20 hours under the action of air oxygen. This reaction process begins as soon as the package is opened.
Detailed information:
Functional purpose
1. It can prevent cold and keep warm, apply hot compress to the body, warm the uterus and stomach, and provide menstrual care. Once applied, a quick hot compress, reduce swelling, relieve pain, activate. blood circulation and eliminates blood stasis, and is widely used in various types of chills.
2. Quickly relieves and eliminates pain caused by various cold diseases. It is suitable for patients with arthritis, frozen shoulder, waist and leg pain, rheumatism and cold limbs and pain in the zone affected. in the cold Ready-to-use product that provides rapid pain relief.
3. It repels cold and keeps warm, promotes microcirculation of the human body, and has good swelling and analgesic effects on frostbite of hands and feet, bone injuries, muscle injuries and other symptoms.
4. Promote the smooth flow of meridians, use hot compresses on relevant acupoints to eliminate symptoms such as stomach cold discomfort and blocked menstrual blood, and have the effect of promoting blood circulation and d eliminate blood stasis.
Saturated salt water is a mixture, not an electrolyte, and can conduct electricity.
Saturated salt water is a mixture with no fixed composition and has no chemical formula. However, the solute in saturated salt water is sodium chloride, with the chemical formula NaCl. Saturated salt water is a solutionaqueous solution of sodium chloride and can conduct electricity. Sodium chloride is therefore a powerful electrolyte. However, saturated salt water is a mixture of salt and water and cannot be considered an electrolyte.
Saturated brine refers to the addition of salt to a certain aqueous solution to dissolve the salt. When enough salt is added, the salt can no longer dissolve. At this point, the aqueous solution is saturated salt water.