Self-heating food packaging is highly active packaging which has the capability to rapidly heat food contents with no outside energy or heat sources. Such packaging generally uses an exothermic reaction as a mechanism for heating. Self-cooling packs can also be self-cooling. During storage, the heat pack is usually placed in an upright position so that its bottom remains uncovered. The heat source is often an electrically conductive appliance. It can either be a water bath or electric coil that can generate surface heat for the purpose of maintaining the temperature inside the box.
Self-heating products have the potential to greatly improving the quality of the final product. They also allow greater control over the preservation and freshness of the food. This is in contrast to traditional packaging, where there is no control over storage conditions of packaging materials and heat retention. The end product may even lack the freshness desired.
The popularity of self-heating food packaging is not a recent phenomenon. The first such packages were manufactured in the 1950s. Nowadays, a wide variety of these products are used for food packaging, including ice boxes, gel packets, and other forms of sealed food. Self-heating packaging is extensively used for food, especially for confectionery products and hot snacks. Most people are already familiar with self-sealing food bags.
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