| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter that can ensure high fixing strength and reduce the amount of emission of ultrafine particles.SOLUTION: A filter has a filter base material (filter main body 67) having a rugged surface shape where groove parts 77 and projection parts 79 are alternately arranged, and frames 69 respectively bonded to both ends of the filter base material orthogonal to the rugged shape direction, and the groove parts 77 and projection parts 79 are projected with respect to the frames 69. A filter 65 preferably has frames 69 that are a belt-like nonwoven fabric. |
