| 摘要 |
<p>A portable heating device for a diversity of uses, including warming the human or animal body for comfort or therapeutic purposes or acting as a space storage heater, comprises an organic polymeric heat storage medium in the viscous flowable or viscoelastic form at use temperatures, typically 40 °C to 65 °C, and may include up to 60 % of an inorganic filler. The polymeric heat storage medium may be, for example, a polyethylene glycol or polyethylene oxide or a crosslinked or viscosity increased polyethylene glycol. Preferably the polymer crystallises at temperatures in the range 20 °C to 100 °C. The heat storage medium may be enclosed in a sac of a vulcanised natural rubber which is particularly suitable for heating in a microwave oven. The reluctance to flow of the heat storage medium reduces the likelihood of injury if the device is ruptured.</p> |
