6/16/2023 0 Comments Como funciona coolpackGel packs are often made of non-toxic materials that will remain a slow-flowing gel, and therefore will not spill easily or cause contamination if the container breaks. For example, substances can be added to prevent bacterial growth in the pack, or to prevent the water from solidifying so it remains a thick gel throughout use. Additives to improve the properties of water are often used. Water has a much higher latent heat of fusion than most substances, and a melting temperature which is convenient and easily attained with, for example, a household freezer. Ice initially well below freezing temperature will last a little longer. The amount of ice needed varies with the amount of food, its initial temperature, the thermal insulation of the cooler, and the ambient temperature and exposure to direct sunlight. Ice packs are used in coolers to keep perishable foods (especially meats, dairy products, eggs, etc.) below the 5–75 ☌ (41–167 ☏) danger zone when outside a refrigerator or freezer, and to keep drinks pleasantly cool. Both ice and other non-toxic refrigerants (mostly water) can absorb a considerable amount of heat before they warm above 0 ☌ (32 ☏).` To be prepared for use, the pack is first placed in a freezer.
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