| 摘要 |
<p>An electret material having excellent charge retentivity against heat is provided. The electret material 10 includes an electrode plate 1, a semiconducting layer 2 formed on the electrode plate 1, and an electret layer 3 formed on the semiconducting layer 3. The semiconducting layer 2 includes carbon and a fluororesin. This electret material 10 can be inhibited from decreasing in the surface potential of the electret layer 3 when heated to a high temperature.</p> |
