| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an electret sheet adsorbing a harmful gas, a malodorous gas, dust or mist which is harmful to a human body and having antibacterial and antiviral property and its producing method. SOLUTION: This electret sheet is formed by fixing a calcium phosphate based compound on a sheet base material composed of a thermoplastic synthetic fiber. In such a case, the charge density on the surface is made to be >=1.0×10<-10> C/cm<2> . The producing method of the electret sheet is by fixing the calcium phosphate based compound on the sheet base material composed of the thermoplastic synthetic fiber and then, making the sheet base material into the electret.</p> |
