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US 7,550,118 B2Granted
Multilayer mats for use in pollution control devices
Assignee3M Innovative Properties Company
InventorRichard P. Merry
Life of this patent
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Abstract
Multilayer mats, pollution control devices containing the multilayer mats, and methods of making the multilayer mats are provided. The multilayer mats include a non-intumescent layer sandwiched between two intumescent layers. The outer layers of the mats contain intumescent materials.
Claims21
A multilayer mat comprising:
- a non-woven non-intumescent layer comprising inorganic fibers;
- a first intumescent layer forming a first outer layer of the multi layer mat;
- and
- a second intumescent layer forming a second outer layer of the multilayer mat,
- wherein the non-intumescent layer is positioned between the first intumescent layer and the second intumescent layer.
2 more elements
A pollution control device comprising:
- a first metal housing;
- a pollution control element inside the first metal housing;
- a multilayer mounting mat positioned between the first metal housing and the pollution control element, said multilayer mounting mat comprising:
- a non-intumescent layer comprising inorganic fibers;
- a first intumescent layer forming a first outer layer of the multilayer mat;
- and
- a second intumescent layer forming a second outer layer of the multilayer mat,
- wherein the non intumescent layer is positioned between the first intumescent layer and the second intumescent layer.
5 more elements
A method of forming the multilayer layer mat, said method comprises:
- providing a non-woven non-intumescent layer having a first major surface and a second major surface opposite said first major surface, said non-intumescent layer comprising inorganic fibers;
- positioning a first intumescent layer facing the first major surface of the non-intumescent layer, said first intumescent layer being a first outer layer of the multilayer mat;
- and
- positioning a second intumescent layer facing the second major surface of the non-intumescent layer, said second intumescent layer being a second outer layer of the multilayer mat.
1 more element
Dependencies are inferred from the claim text.