SELF-REGULATING HEAT PACK

摘要

The invention relates to a self-heating, disposable heating pack (1) utilizi ng an exothermic chemical reaction. Self-moderation of the heat pack is provide d through the use of a preformed reversibly stiffened gel that alters the rate of exothermic chemical reactions. A vaporizable solvent is used to adjust th e gel stiffness. The heat pack can be used in heat transfer or ambient temperature conditions which differ from those anticipated as design conditions.