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US 8,524,161 B2Granted
Multiple layer substrate support and exhaust gas treatment device
AssigneeUnifrax I LLC
InventorsAmit Kumar, Sergio David Fernandes, Jr.
Life of this patent
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Abstract
A mat or mat-pre-form hybrid for use in an exhaust gas treatment device, such as catalytic converters and diesel particulate traps that are used in automotive exhaust systems. The mat or hybrid may be used as a mounting mat to mount a fragile monolith within an outer housing of an exhaust gas treatment device or as thermal insulation in an end cone of the exhaust gas treatment device.
Claims41
A multiple layer mat comprising:
- a first layer comprising a sheet of inorganic fibers having a first major surface and a second major surface opposite the first major surface;
- a second layer comprising a sheet of inorganic fibers having a first major surface and a second major surface opposite the first major surface;
- a microporous inorganic insulating layer positioned between the first layer and the second layer.
A multiple layer mat comprising:
- a first layer comprising a sheet of inorganic fibers having a first major surface and a second major surface opposite the first major surface;
- a second layer adjacent said first layer, said second layer comprising a microporous inorganic insulating layer having a first major surface and a second major surface opposite the first major surface;
- and
- wherein the first layer and the second layer are encapsulated within a polymeric bag.
1 more element
A multiple layer support comprising:
- a microporous inorganic insulating layer comprising a three-dimensional pre-form;
- and
- a flexible fibrous layer disposed about at least a portion of the perimeter of the three-dimensional pre-form.
A multiple layer mat comprising:
- a first layer comprising a sheet of inorganic fibers having a first major surface and a second major surface opposite the first major surface;
- a second layer comprising a microporous inorganic insulating layer having a first major surface and a second major surface opposite the first major surface;
- and
- either:
- (i) a bonding means between the first layer and the second layer;
- (ii) a banding means encircling at least a portion of the exterior surfaces of the first layer and the second layer, such that the first layer is engaged with the second layer;
- or
- (iii) a scrim layer, wherein the second major surface of the first layer is engaged with the first major surface of the second layer, and the scrim layer is engaged with the second major surface of the second layer.
5 more elements
Dependencies are inferred from the claim text.