| 摘要 |
<p>A PTF (polymer thick film) device (10) comprises a substrate (22, 32), a functional PTF layer (24,34) applied on the substrate and a protective cover (25, 35) applied over the PTF layer, the protective cover being an adhesive tape comprising a carrier layer (27, 37) and a layer of adhesive (26, 36), the carrier layer being coated with the layer of adhesive (26, 36), the layer of adhesive (26,36) having a thickness comprised in the range from 10 % to 100 % of the print thickness of the PTF layer (24, 34). The PTF layer is a carbon ink layer, a silver ink layer, a graphite ink layer, a carbon-silver ink layer, a carbon-graphite ink layer, a graphite-silver ink layer, a carbon-graphite-silver ink layer or a PTC layer (Positive Temperature Coefficient). The PTF device can be used as an electric heater, e.g for car seats.</p> |
