This process absorbs heat from the surroundings, quickly lowering the pack's temperature. When the inner bag of water is broken by squeezing the package, it dissolves the solid in an endothermic process. The first reusable hot cold pack that could be heated in boiling water or a microwave oven was first patented in 1973.Īn instant cold pack is a single-use device that consists of two bags one containing water, inside a bag containing ammonium nitrate, calcium ammonium nitrate or urea. The first hot and cold pack was introduced in 1948 with the name Hot-R-Cold-Pak and could be chilled in a refrigerator or heated in hot water. They can be used as a normal reusable ice pack by storing in a freezer, but they can also be heated in water or a microwave oven to reach the desired temperature. Hot-or-cold packs are ice packs that are rated for high temperature use. Gel packs may be made by adding hydroxyethyl cellulose, sodium polyacrylate, or vinyl-coated silica gel.
![como funciona coolpack como funciona coolpack](https://www.neo2.com/wp-content/uploads/2019/04/jagermeister-coolpack-chupito-helado-2.jpg)
Gel 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.
![como funciona coolpack como funciona coolpack](https://i.ytimg.com/vi/OefKpA_vNeQ/maxresdefault.jpg)
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 ☏).` These have different colors and patterns, and they can be use to create tiled backgrounds, such as wallpapers or textures.To be prepared for use, the pack is first placed in a freezer.
![como funciona coolpack como funciona coolpack](https://www.boschtools.com/us/es/ocsmedia/optimized/full/BAT612_hero.png)
There are 24 tiles in total to choose from, each having a 128x128 resolution. The collection is not organized well, so you have to check out each file to find out its size. Apart from the aforementioned colors, there are two vine, three multicolor and one checker bars. Except for 15 animated GIFs for email, welcome and "under construction" LED signs, the files have still GIFs format.įor each color there are six or seven bars available, along with two buttons. There are 118 graphic files in total with different sizes, and all of them have the GIF extension. The theme of the collection is based on various colors, such as aqua, dark blue, light blue, gray, green, orange, gold, purple, yellow, gold, red, and black. Color-themed GIF bars, buttons and tiles with various sizes CoolPack represents a royalty-free collection of bars, buttons and tiles that you can use for your websites, multimedia applications and programming projects.īefore proceeding any further, you should know that the collection hasn't been updated for a very long time, and the graphics files have low quality.