Inflation occurs due to gas production during the reaction. As the iron powder oxidizes, small amounts of carbon dioxide (CO₂) are released. This gas can get trapped inside the patch, causing it to puff up. The flexible materials used in the patch allow it to expand without compromising its structure.
Factors contributing to inflation:
High Humidity or Temperature: Increases the reaction rate, leading to more gas production.
Patch Design: Some patches are designed to expand more easily.
Air Exposure: Exposure to too much air accelerates the reaction, producing more gas.
Is It Safe to Use an Inflated Patch?
Yes, an inflated patch is safe to use. It does not affect the heat output or performance. However, if the patch becomes overly inflated or uncomfortable, remove it immediately. Avoid using a patch that is leaking or torn.
How to Prevent Excessive Inflation?
Store patches in a cool, dry place to prevent premature activation.
Follow instructions carefully and minimize air exposure.
Use the patch within the recommended temperature range.
Conclusion
The inflation of a heat patch is a natural result of the chemical reaction inside, caused by gas production. It is not a safety concern and does not affect effectiveness. By understanding this process, users can confidently use their heat patches. If discomfort arises, contact us for assistance.
