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US 8,945,269 B2Granted
Holding sealing material, method for producing holding sealing material, and exhaust gas purifying apparatus
AssigneeIbiden Co., Ltd.
InventorKeiji Kumano
Life of this patent
Estimating the term…
Abstract
A holding sealing material includes a mat, an inorganic binder and an organic binder. The mat includes inorganic fibers and has an upper part, a center part, and a lower part in a thickness direction. The inorganic binder is loaded on the mat. The organic binder is loaded mainly on the upper part and the lower part of the mat. The holding sealing material is disposed between an exhaust gas-treating body and a casing for housing the exhaust gas-treating body to form an exhaust gas purifying apparatus.
Claims17
A method for producing an exhaust gas purifying apparatus, the method comprising:
- preparing a mat for a holding sealing material, the mat being needle-punched and including inorganic fibers, the mat having an inner part and an outer part in a thickness direction of the mat;
- contacting the mat with an inorganic binder-containing liquid containing an inorganic binder to impregnate the inorganic fibers in the mat with the inorganic binder-containing liquid;
- dehydrating the mat impregnated with the inorganic binder-containing liquid to control an amount of the inorganic binder-containing liquid loaded on the inorganic fibers within a predetermined range;
- spraying an organic binder-containing liquid containing an organic binder to the inner part of the mat and to the outer part of the mat such that a loaded amount of the organic binder per unit weight of the inorganic fibers in the outer part is more than loaded amount of the organic binder per unit weight of the inorganic fibers in the inner part;
- drying the mat loaded with the inorganic binder-containing liquid and the organic binder-containing liquid;
- and
- providing the holding sealing material between the exhaust gas-treating body and the casing to be wound around the exhaust gas-treating body, a surface of the outer part of the mat being in contact with the casing, a surface of the inner part of the mat being in contact with the exhaust gas-treating body.
4 more elements
An exhaust gas purifying apparatus comprising:
- a casing;
- an exhaust gas-treating body housed in the casing;
- a holding sealing material comprising:
- a mat including inorganic fibers and having an inner part and an outer part in a thickness direction of the mat;
- an inorganic binder loaded on the mat;
- and
- an organic binder loaded on the inner part and the outer part of the mat, a loaded amount of the organic binder per unit weight of the inorganic fibers in the outer part being more than a loaded amount of the organic binder per unit weight of the inorganic fibers in the inner part;
- and
- the holding sealing material being wound around the exhaust gas-treating body and being disposed between the exhaust gas-treating body and the casing, a surface of the outer part of the mat being in contact with the casing, a surface of the inner part of the mat being in contact with the exhaust gas-treating body.
6 more elements
Dependencies are inferred from the claim text.