| 摘要 |
<p>A heating element comprises a substantially planar base 20 of polyethylene terephthalate (PET) coated with a planar matrix of at least partially non-linearly orientated carbon fibres dispersed thereon, the base layer defining a series of apertures 15 there though for determining the resistance of the element. Copper foil terminal bus bars 30 extend beyond the base area, one of which electrically connects to the external aluminium layer of a foiled polyester layer 50,60 encapsulating the base layer 20 which aluminium forms a neutral layer. The internal face of the polyester layers carry a thermally activated adhesive. The element is controlled via an associated thermo sensor and a controller which determines the required voltage to be applied from a resistance verus temperature profile. The heater may be user in space heating applications or for example deicing roadways, runways, rigging or oil tanks.</p> |
