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Flexible fibrous material, pollution control device, and methods of making the same

A pollution control, flexible fiber technology used in separation methods, exhaust devices, mufflers, etc.

Active Publication Date: 2011-08-17
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ceramic monoliths generally have very thin walls, providing a lot of surface area and are fragile and prone to breakage

Method used

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  • Flexible fibrous material, pollution control device, and methods of making the same
  • Flexible fibrous material, pollution control device, and methods of making the same
  • Flexible fibrous material, pollution control device, and methods of making the same

Examples

Experimental program
Comparison scheme
Effect test

example 1-31 and comparative example A

[0097] Flakes of fibrous material were prepared according to "General Procedure for Making Fibrous Flakes" (see above) using the flocculants shown in Table 2. The results of the fiber flake measurements are also shown in Table 2 (see below).

[0098] Table 2

[0099]

[0100]

[0101]

example 32

[0103]Two containers were filled with 1000 ml of tap water adjusted to 12 to 14°C. Ethylene-vinyl acetate terpolymer latex (1.8 g) available from Air Products under the trade designation "AIRFLEX 600BP" and 0.1 g of defoamer available from Henkel under the trade designation "FOAMASTER 111" were added to each container Neutralize and mix gently to disperse the latex. Additionally, 10 grams of inorganic fibers (partially cleaned such that they contained less than 50% by weight unfiberized material) available from Thermal Ceramics under the trade designation "HA-BULK" were added to one of the containers and mixed to disperse the fibers. A milky white appearance caused by dispersion of the latex in water was observed in both containers. A flocculant (0.1 gram) available from Mid South Chemical under the trade designation "7307C" was added to each container with gentle mixing. In the containers containing both the latex and the inorganic fibers, a noticeable clarification of the ...

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Abstract

A flexible fibrous material comprises inorganic fibers and a binder and methods of making the same. The binder comprises at least one of: a first organic polymer having anionic groups and a flocculent, the flocculent comprising a second organic polymer having cationic groups; or a reaction product of the first organic polymer and the flocculent. Flexible fibrous material according to the present invention may be used as components in certain pollution control devices.

Description

[0001] This patent application is a divisional application of Chinese patent application 200880005509.8 (PCT international application PCT / US2008 / 052241). Background technique [0002] Pollution control devices are used on motor vehicles to control air pollution. Currently, two types of such devices are widely used: catalytic converters and diesel particulate filters or traps. Catalytic converters contain a catalyst that is usually coated onto a monolithic structure mounted in the converter. Monolithic structures are typically ceramics, although metal monoliths have been used. Catalysts oxidize carbon monoxide and hydrocarbons, and reduce nitrogen oxides in vehicle exhaust to control air pollution. Diesel particulate filters or traps are generally wall flow filters having a honeycomb monolithic structure usually made of a porous crystalline ceramic material. [0003] Typically, as constructed, each type of these devices has a metallic housing that holds within it a monolith...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/36B01D53/00B01D53/34D04H1/4209D04H1/64D04H1/732
CPCB01D39/2024B01D39/2089D21H13/36F01N3/2853D21H27/00B01D2239/08Y10T428/249924D21H5/18D21H1/00B01D53/34B01D53/00
Inventor 安尼·N·德罗维尔盖瑞·F·豪沃思迈克尔·帕特里克·M·曼达纳斯
Owner 3M INNOVATIVE PROPERTIES CO