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A heating pad is a pad used for warming of parts of the body in order to manage pain. Localized application of heat causes the blood vessels in that area to dilate, enhancing perfusion to the targeted tissue. Types of heating pads include electrical, chemical and hot water bottles. Specialized heating pads (mats) are also used in other settings.
Disposable heat packs typically contain cellulose, iron, water, activated carbon, vermiculite, and salt. When these packs are exposed to air, an exothermic chemical reaction occurs, which provides several hours of heat. Another chemical heating pad uses a gel that can be activated by twisting the package, thus triggering a chemical reaction.
The release of heat is triggered by flexing a small metal disk in the hand warmer, which generates nucleation centers that initiate crystallisation. Heat is required to dissolve the salt in its own water of crystallisation and it is this heat that is released when crystallisation is initiated. [9] The latent heat of fusion is about 264–289 kJ ...
“Heating pads are an effective way to soothe your sore muscles and temporarily ease any stiffness and discomfort,” says Sandra Gail Frayna, physical therapist at Hudson PT. Sean Alexander, ACE ...
Siena Large Heating Pad. Even many of the largest heating pads we tested measure no wider than 20 inches on any one side. Serta's Siena heating pad is a whopping 35 x 20 inches, so it's basically ...
WeightedWarmth 3-in-1 Heating Pad. I love a good heating pad, but sometimes you could also use a little massage to go with it. Enter: this heating pad from Pure Enrichment, which has three heat ...
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