| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas treatment device holding material whose holding force is effectively maintained, a gas treatment device and its manufacturing method.SOLUTION: In a gas treatment device having a treatment structure and a casing for accommodating the treatment structure, a holding material is composed of an inorganic fiber arranged between the treatment structure and the casing. In a test for repeating a cycle in which the holding material is compressed and maintained for ten seconds until the bulk density of the holding material reaches compression-time bulk density, and after that, the holding material is released until the bulk density of the holding material reaches release-time bulk density lower than the compression-time bulk density by 12%, the release-time surface pressure and compression-time bulk density of the holding material at a time point that the cycle is repeated 2,500 times satisfy the following relationship: P≥17.10×D-1.62, where P indicates the release-time surface pressure (N/cm), and D indicates the compression-time bulk density (g/cm). |
