Abstract: The inorganic fiber molded body of the present invention is characterized in that the molded body has an extremely light weight, and is free from problems such as scattering of fibers and particulate matters from a surface thereof and environmental pollution such as generation of harmful gases. In addition, the present invention provides an inorganic fiber molded body that is excellent in not only thermal shock resistance and mechanical shock resistance but also a high-speed wind erosion resistance, well-balanced in properties and can be used in the applications of various heat-insulating materials. The present invention relates to an inorganic fiber molded body comprising inorganic fibers and inorganic binder particles and having at least one set of a high-fiber density region and a low-fiber density region, in which a ratio of a content of the binder particles in the high-fiber density region to a content of the binder particles in the low-fiber density region as measured by a predetermined method is 0.

Abstract: Inorganic fiber formed articles containing a mat-like aggregate of inorganic fibers, the articles obtained by a needling treatment wherein a needling density per unit area of a surface of a mat exceeds 50 punches/cm2, where: i) a ratio of a number NA of fiber bundles extending in a thickness direction and located in a region with a predetermined width W of section A in a predetermined direction, to a number NB of fiber bundles extending in the thickness direction and located in a region with a predetermined width W of section B in a direction orthogonal to the predetermined direction, NA/NB, is 0.5 or less; ii) a width of each of fiber bundle in sections A and B in the thickness direction is 0.3 mm or less; and iii) a needle mark is present in any 3 mm×3 mm region on the surface of the mat.

Abstract: The inorganic fiber molded body of the present invention is characterized in that the molded body has an extremely light weight, and is free from problems such as scattering of fibers and particulate matters from a surface thereof and environmental pollution such as generation of harmful gases. In addition, the present invention provides an inorganic fiber molded body that is excellent in not only thermal shock resistance and mechanical shock resistance but also a high-speed wind erosion resistance, well-balanced in properties and can be used in the applications of various heat-insulating materials. The present invention relates to an inorganic fiber molded body comprising inorganic fibers and inorganic binder particles and having at least one set of a high-fiber density region and a low-fiber density region, in which a ratio of a content of the binder particles in the high-fiber density region to a content of the binder particles in the low-fiber density region as measured by a predetermined method is 0.

Abstract: There is provided an inorganic fiber formed article in which the thickness and the surface density can be easily controlled and which has excellent workability and handleability and prevents the deterioration of the work environment when the inorganic fiber formed article is processed for applications, e.g., a heat insulator or a mat. The inorganic fiber formed article includes a mat-like aggregate of inorganic fibers, the inorganic fiber formed article being subjected to needling treatment. The needling density of a surface of the mat exceeds 50 punches/cm2. One or more of requirements (1) to (3) described below is satisfied. (1) The ratio of the number NA of fiber bundles to the number NB of fiber bundles, i.e., NA/NB, is 0.5 or less, the fiber bundles extending in the thickness direction and being observed in regions with a predetermined width W of section A in the longitudinal direction and section B in the transverse direction.