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Mounting mat and pollution control equipment using the same

A non-woven mat, weight technology, applied in mechanical equipment, methods of reacting gaseous media with gaseous media, applications, etc., can solve problems such as lack of temperature resistance

Inactive Publication Date: 2011-11-30
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mats including magnesium aluminum silicate type glass fibers have also been tried, but such mats generally lack sufficient temperature resistance

Method used

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  • Mounting mat and pollution control equipment using the same
  • Mounting mat and pollution control equipment using the same
  • Mounting mat and pollution control equipment using the same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0274] A mat was prepared as described in the comparative example, the mat comprising 75% by weight of R-glass fibers (as described in the comparative example) and 25% by weight of heat-treated quartz fibers (9 microns in diameter; available under the trade name "REFRASIL " purchased from HITCO (Gardena, CA)).

[0275] The nonwoven mat of Example 1 was subjected to Real Conditions Fitting Test (RCFT) and Thermomechanical Analysis (TMA) testing. The RCFT data for Example 1 are summarized in Table 1 above. The resiliency value of the nonwoven mat of Example 1 was greater than 1.1. The TMA data for Example 1 are also summarized in Table 2 above. Pad shrinkage of Example 1 at 700°C was reduced by 30% compared to Comparative Example.

example 2

[0277] A pad comprising 75% by weight of R-glass fibers (as described in the comparative example) and 25% biosoluble ceramic fibers (uncut; available under the trade name "ISOFRAX" from Unifrax Corporation (Niagara Falls, NY)).

[0278] The nonwoven mat of Example 2 was tested by Real Conditions Fitting Test (RCFT) and Thermomechanical Analysis (TMA). The RCFT data for Example 2 are summarized in Table 1 above. The resiliency value of the nonwoven mat of Example 2 was greater than 1.1. The TMA data for Example 2 are summarized in Table 2 above.

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Abstract

The present invention discloses a non-woven mat including magnesium aluminum silicate glass fibers and amorphous refractory ceramic fibers, bio-soluble ceramic fibers, and / or heat-treated silica fibers. Embodiments of the nonwoven mat surprisingly have a Resiliency Value after three thermal cycles from 25 DEG C to 700 DEG C / 400 DEG C of the Real Condition Fixture Test at least 1.1 times greater than the Resiliency Value of a comparable non-woven mat consisting of any individual type of fibers of the non-woven mat. The non-woven mats are useful, for example, in pollution control devices and other thermal insulation applications.

Description

Background technique [0001] Pollution control devices such as catalytic converters for gasoline engines have been known for over 30 years. Over the past few years, stricter regulations for diesel vehicles have led to a rapid increase in other pollution control devices, including diesel oxidation catalysts (DOC's), diesel particulate filters (DPF's), and selective catalyst reduction devices (SCR's ). Pollution control devices typically include a metal housing or housing with pollution control elements securely mounted within the housing by resilient and flexible mounting pads. Catalytic converters, including diesel oxidation converters, contain a catalyst, usually coated on a monolithic structure. The monolithic structure is usually ceramic, but metallic monoliths are also known. Catalysts in gasoline engines oxidize carbon monoxide and hydrocarbons and reduce nitrogen oxides to control air pollution. The Diesel Oxidation Catalyst oxidizes the soluble organic components of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/42D04H1/46B01D53/34B01D53/94F01N3/24F01N3/28
CPCD04H1/46F01N3/2853F01N13/141B01D2258/012B01D2255/2092D04H1/42B01D2255/30B01D2255/206B01D2258/014B01D2255/9207D04H1/4209D04H1/4218D04H1/4234D04H1/43828D04H1/43835D04H1/43838Y10S55/03Y10S428/92Y10S428/921Y10T442/609Y10T442/697B01D53/94
Inventor 安尼·N·德罗维尔拉侯赛因·拉劳科理查德·P·梅里
Owner 3M INNOVATIVE PROPERTIES CO