Warm baby, also known as warm sticker, is a tool that can be used for heating. The reaction principle is to use the primary battery to speed up the oxidation reaction and convert chemical energy into thermal energy. In order to allow the temperature to last longer, the mineral material vermiculite was used to keep the heat in.
Because it cannot react before use, the bag material should be very special, consisting of a raw material layer, a gelatin layer and a non-woven bag. Non-woven bags are made of microporous breathable film, and it must also have a conventional non-breathable outer bag. When using, remove the outer bag and expose the inner bag (non-woven bag) to air, and the oxygen in the air enters the inside through the breathable film. The time and temperature of the exothermic heat are controlled by the oxygen permeability rate of the breathable membrane. If oxygen is transmitted too quickly, the heat is released at once, and it may burn the skin. If oxygen is too slow, there is no temperature. After use, it is a black-brown solid, which contains toner, NaCl solids, Fe2O3 solids and salts containing magnesium and aluminum.
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