| abstract |
(57) [Summary] (Modified) [Purpose] Electret sheet that has a high surface electrification density even though it is a resin processed product, and further satisfies a high level of surface charge density and functionality, such as antibacterial and antifungal properties. Electret sheet and its manufacturing method, and also provide high-performance filter base material such as cabin filter to make the air taken into the room refreshing. [Structure] A sheet to which a chlorinated polyolefin or a resin composition in which a functional agent and a chlorinated polyolefin are blended is applied and the sheet is 1 × 10 −10 coulomb / After having a surface charge density of cm 2 or more and applying chlorinated polyolefin to the sheet, electret processing is performed. |