| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a felt comprising polyphenylene sulfide fibers which is used as a bag filter, etc., by which the filter can stably filter dust discharge gas over long, improves the elasticity of the filter, and hence enables vibrational force to be efficiently propagated when the surface dust is removed by back washing and vibration. <P>SOLUTION: The filter felt is characterized by comprising at least one layer of a nonwoven fabric comprising 30% or more of hollow polyphenylene-sulfide short fibers having a percentage of hollowness of 5-50%, specific volume of 50 cm<SP>3</SP>/g or higher, and compressibility of 75% or less. <P>COPYRIGHT: (C)2008,JPO&INPIT |
