In recent years, self-heating warmers have become more and more popular. They are not only small and easy to use, but also can provide the heat more than 10 hours. So do you know the reason? Let’s find out below!
The working principle of self-heating warmers is mainly based on a chemical reaction. So first we should analyze its content composition.
1. Content Composition
(1) Iron Powder:
Self-heating warmers usually contain iron powder or similar metal powder inside. Iron is a metal that oxidizes easily, that is, it reacts with oxygen
(2) Activated Carbon:
It has two functions during this reaction process. One is to absorb moisture in the air and ensure the smooth progress of oxidation; another is to conduct heat, that is, to help dissipate heat evenly.
(3) Vermiculite:
It is a natural, inorganic, non-toxic mineral that expands under high temperatures. It plays a role in extending the heating time and retaining heat.
(4) Salt and Water:
This principle is similar to the oxidation reaction of iron powder with oxygen, but in this case, the iron powder reacts with an aqueous solution containing salt. The ions in the salt will promote the oxidation reaction of the iron powder and generate heat.
2. Oxidation Reaction
When the self-heating warmers is exposed to the air, the iron powder begins to undergo an oxidation reaction with oxygen. This oxidation process will release heat energy.
3. Exothermic
When iron powder oxidizes, the chemical reaction produces heat. This heat is released through the outer non-woven fabric, warming the surrounding environment.
The above is the heating principle of air-activated warmers. If you are also interested in self-heating warmers, please contact us, we will give you the biggest support!
