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A sodium acetate heat pad. Disposable chemical pads employ a one-time exothermic chemical reaction.One type, frequently used for hand warmers, is triggered by unwrapping an air-tight packet containing slightly moist iron powder and salt or catalysts which rusts over a period of hours after being exposed to oxygen in the air.
ThermaCare is a brand name of a disposable heating pad made by Angelini.. The brand was first introduced in 2001 by Procter & Gamble. [1] P&G sold the Thermacare brand to Wyeth in 2008 and merged with Pfizer in 2009.
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 ...
Homedics Weighted Heating Pad $15.99 at HSN. This electric heating pad from Homedics is designed to draw moisture from the air to deliver moist heat without water, according to the brand.
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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 ...
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