Mat material, exhaust gas purification device, and method for producing mat material
AssigneeIbiden Co., Ltd.
InventorYuta Kogo
Life of this patent
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Abstract
A mat material including: a base mat containing inorganic fibers and having a first main surface and a second main surface; and a sheet material disposed on at least one of the first main surface or the second main surface, wherein the sheet material is a stacked sheet material in which longitudinally oriented fibers and transversely oriented fibers are stacked, the sheet material has openings surrounded by the longitudinally oriented fibers and the transversely oriented fibers, and an average opening area of the sheet material is more than 0 mm2/piece and 0.7 mm2/piece or less.
Claims14
A mat material comprising:
- a base mat containing inorganic fibers and having a first main surface and a second main surface;
- and
- a sheet material disposed on at least one of the first main surface or the second main surface,
- wherein the sheet material is a stacked sheet material in which longitudinally oriented fibers and transversely oriented fibers are stacked,
- the sheet material has openings surrounded by the longitudinally oriented fibers and the transversely oriented fibers,
- an average opening area of the sheet material is more than 0 mm2 and 0.7 mm2 or less,
- the sheet material has an opening ratio of 10 to 25%,
- one or more fibers of the longitudinally oriented fibers are angled relative to other fibers of the longitudinally oriented fibers,
- one or more fibers of the transversely oriented fibers are angled relative to other fibers of the transversely oriented fibers, and
- an angle between the orientation direction of the longitudinally oriented fibers and the orientation direction of the transversely oriented fibers is 60° or more and 120° or less.
A method of producing a mat material, comprising:
- a base mat preparation step of preparing a base mat containing inorganic fibers and having a first main surface and a second main surface;
- a sheet material preparation step of preparing a sheet material;
- and
- a sheet material placement step of placing the sheet material on at least one of the first main surface or the second main surface of the base mat,
- wherein the sheet material is a stacked sheet material in which longitudinally oriented fibers and transversely oriented fibers are stacked,
- the sheet material includes openings surrounded by the longitudinally oriented fibers and the transversely oriented fibers,
- an average opening area of the sheet material is more than 0 mm2 and 0.7 mm2 or less,
- the sheet material has an opening ratio of 10 to 25%,
- one or more fibers of the longitudinally oriented fibers are angled relative to other fibers of the longitudinally oriented fibers,
- one or more fibers of the transversely oriented fibers are angled relative to other fibers of the transversely oriented fibers, and
- an angle between the orientation direction of the longitudinally oriented fibers and the orientation direction of the transversely oriented fibers is 60° or more and 120° or less.
Dependencies are inferred from the claim text.