Disposable heat packs typically contain a combination of ingredients that work together to generate heat. The specific composition can vary between different brands and types of hand warmers, but here are the common components and their functions:
Iron Powder: Iron powder is a key ingredient in most hand warmers. When exposed to air, it undergoes an exothermic reaction known as oxidation, which generates heat. The iron powder acts as a catalyst for this reaction.
Activated Carbon: Activated carbon helps facilitate the oxidation process by providing a larger surface area for the reaction to occur. It helps increase the efficiency and speed of heat generation.
Salt and Water: Salt and water are often included in hand warmers to act as a catalyst and aid in the oxidation process. It helps enhance the reaction between the iron powder and air, leading to increased heat production.
Vermiculite : These materials are commonly used as fillers in hand warmers. They help distribute the heat evenly throughout the hand warmer and provide insulation to prevent heat loss.
About the air activated heat packs, we can promise that all our hand warmer and body warmer can heat up for 12+ hours, toe warmer, foot insole warmer and seating warmer can heat up for 8+ Hours, Large warmer can heat up for 24 hours. Especially the hand warmer, actually most of our local manufacturer only can offer 8~10 hours now, although sometimes the heating hours on their package is marked 12 hours. But we can promise that our hand warmers can continuously release heat for 12 hours and start to heat within 1~2 minutes, the temperature of all our warmers are very very stable and balanced.
So our hand warmer is very competitive on the current market, we sincerely cherish this chance to cooperate with you, any other questions, please contact us to check more details!
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