Retaining material for pollution control element, method for manufacturing the same, and pollution control device
Assignee3M Innovative Properties Company
InventorKenji Sako
Life of this patent
Estimating the term…
Abstract
A retaining material that can sufficiently maintain the function of retaining a pollution control element in a pollution control device at high temperature. In one aspect, the retaining material has a mat shape and contains inorganic fiber material, with the retaining material containing: a surface layer containing inorganic colloid particles; and an internal region positioned further to the inside than the surface layer, impregnated with inorganic colloid particles and organic binder; wherein the surface layer contains inorganic colloid particles at a higher concentration than the internal region; and the amount of inorganic colloid particles in the internal region is 1 mass % to 10 mass % based on the total mass of the retaining material.
Claims14
A retaining material suitable for mounting a pollution control element in a pollution control device comprising:
- a sheet comprising inorganic fiber material with inorganic colloid particles essentially uniformly dispersed in the thickness direction of the sheet and organic binder essentially uniformly dispersed in the thickness direction of the sheet;
- and
- a surface layer comprising a coating containing inorganic colloid particles, the inorganic colloid particles adhered so as to coat a surface of the sheet,
- wherein the amount of inorganic colloid particles in the sheet is 1 mass % to 10 mass % based on the total mass of the retaining material, and the surface layer contains a higher concentration of inorganic colloid particles than the sheet.
Dependencies are inferred from the claim text.