An ice pack or gel pack is a plastic sac of ice, refrigerant gel or liquid, or, in an emergency, even frozen vegetables. The refrigerant, usually non-toxic, can absorb a considerable amount of heat, since its enthalpy of fusion is high. It is commonly used as a cold compress to alleviate the pain of minor injuries or in coolers or insulated shipping containers to keep products cool during transport. The simplest type of ice pack is simply a sack, bag or towel filled with cubed or crushed ice.
These gel packs, as with ice itself, are chilled before use. The gel-pack or water is placed in a freezer or other cooling system to lower its temperature, and then it is used to keep other items cool. Ice packs are effectively a device for storing cooling capacity.
Instant cold packs use an endothermic reaction to cool down quickly. These types of ice packs are stored at room temperature rather than needing to be physically cooled before use. When one breaks a tube inside the pack, two chemicals mix or react and absorb enough energy to produce a cooling effect. Common types include solid ammonium nitrate dissolving in water.[4][5]
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.[6]
The first reusable hot cold pack that could be heated in boiling water or heated in a microwave was first patented[7] by Jacob Spencer of Nortech Labs in 1973 (Patent No. 3,780,537). Reusable hot cold packs differ from instant cold packs in that they can be either frozen or microwaved.
For more :-
Contact us
Address : A-55, Mangol Puri Indstrial Area, Phase - II, New Delhi - 110083
Email Id : info@onyxneo.com
Phone Number : 011-27019335
Mobile No. : +91-9999333556 , 9999906704
for more : www.onyxneo.comEmail Id : info@onyxneo.com
Phone Number : 011-27019335
Mobile No. : +91-9999333556 , 9999906704