Holding seal material, exhaust gas purifying apparatus and method of manufacturing holding seal material
AssigneeIbiden Co., Ltd.
InventorsTakahiko OKABE, Keiji KUMANO
Life of this patent
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Abstract
A holding seal material includes inorganic fibers, skin layers provided around the inorganic fibers, inorganic particles included in the skin layers, a first main surface, and a second main surface. Thicknesses of the skin layers satisfy X>Y≧Z. X is a thickness of the skin layer of the inorganic fibers in a vicinity of the first main surface. Y is a thickness of the skin layer of the inorganic fibers in a vicinity of a center of the holding seal material in a thickness direction. Z is a thickness of the skin layer of the inorganic fibers in a vicinity of the second main surface.
Claims8
A holding seal material comprising:
- inorganic fibers;
- skin layers provided around the inorganic fibers;
- inorganic particles included in the skin layers;
- a first main surface;
- and
- a second main surface,
- wherein thicknesses of the skin layers satisfy a following relational expression (1),
- X>Y≧Z (1)
- wherein X is a thickness of the skin layer of the inorganic fibers in a vicinity of the first main surface,
- Y is a thickness of the skin layer of the inorganic fibers in a vicinity of a center of the holding seal material in a thickness direction, and
- Z is a thickness of the skin layer of the inorganic fibers in a vicinity of the second main surface.
A method of manufacturing a holding seal material, comprising:
- preparing a mat which is made of inorganic fibers and has a first main surface and a second main surface;
- bringing an inorganic binder including inorganic particles and water into contact with the mat;
- and
- blowing hot air so as to hit the second main surface of the mat, thereby ventilating the hot air into the mat and drying the mat.
A method of manufacturing a holding seal material comprising:
- preparing a first mat which includes first inorganic fibers, first skin layers provided around the first inorganic fibers, and inorganic particles included in the skin layers;
- preparing a second mat which includes second inorganic fibers, and second skin layers provided around the second inorganic fibers and being thinner than the first skin layers, or which includes the second inorganic fibers and does not include the second skin layers;
- and
- laminating the first mat and the second mat.
Dependencies are inferred from the claim text.