| 摘要 |
<p>Heat recoverable articles that can be self heating are provided by incorporating at least one pliable, dimensionally deformable fabric electrode into a heat recoverable member, advantageously comprising a conductive polymeric composition. The or each electrode is incorporated into the member prior to its being deformed into its heat unstable state. As a result of their pliability, the electrodes deform as the heat recoverable member is deformed into its heat unstable state and recover with it to its heat stable configuration. The polymeric compsition is chosen to have an ohmic resistance high enough so that, when the electrodes are connected in series to an electrical power source, the current passing through the composition will cause it to be heated. The heat generated in this way can be used to provide all or part of the heat necessary to occasion recovery of the article or to allow its use as a heater after recovery. If desired, the polymeric composition can be one that exhibits a positive temperature coefficient of resistance thereby regulating the maximum temperature to which the article can be self-heated.</p> |
