| 摘要 |
<p>A composition for producing heat when contacted by water at a relatively uniform temperature up to about 260 DEG F without appreciable generation of steam consisting essentially of a particulate primer material which is exothermic when contacted by water, a particulate inorganic oxide or salt which is highly exothermic when contacted by water, and a film-forming component which encapsulates the primer and inorganic oxide or salt in the dry state. A preferred primer is anhydrous calcium chloride, a preferred inorganic oxide is calcium oxide, and a preferred film-forming component is a combination of positively charged guar gum and anhydrous sodium tetraborate. A method and apparatus especially adapted for use of the composition are disclosed, in the heating of a packaged food product.</p> |
