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Nonwoven mat and pollution control device using the same

A technology of pollution control and pollution control components, which is applied in non-woven fabrics, mechanical equipment, textiles and papermaking, etc., and can solve the problems of harmful internal strength, shearing, and reduction of mats

Inactive Publication Date: 2017-02-08
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reducing the total organic content generally results in improved performance of the mounting mat at low temperatures (typically not exceeding 350°C), but can be detrimental to the internal strength of the mat, causing the mat to shear during canning

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Nonwoven mat and pollution control device using the same
  • Nonwoven mat and pollution control device using the same
  • Nonwoven mat and pollution control device using the same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0060] Example 1 was prepared as described for Comparative Example A, except that organic thread (polyester, 125 tex top and bottom threads) was used to add stitching along each edge of the part (after applying the edge protection material ), the suture is the same as figure 1 The distance between the respective edges is generally shown to be about 1.25 cm (0.5 inches). Tex is a measure of the linear mass density of a fiber and is defined as mass per 1000 meters in grams.

example 2

[0062] Example 2 was prepared as described for Example 1, except that, in the figure 2 Typically a third seam has been added below the middle of the part shown.

example 3

[0064] Example 3 was prepared as described for Comparative Example A, except that organic thread (polyester, 125 tex top and bottom threads) was used to add zigzag stitching between the edges of the parts (after applying the edge protection material ), the suture is the same as image 3 The distance between the respective edges is generally shown to be about 1.25 cm (0.5 inches). The angle of the zigzag pattern is 100°.

[0065] Example I

[0066] Illustrative Example I was prepared as described for Comparative Example A, except that an organic thread (polyester, top and bottom threads 125 tex) was used to run along each of the non-intumescent components prior to the lamination process. Add seams to the edges. Thus, the stitching is applied only through the non-intumescent layer and not through the entire part.

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Abstract

The present invention provides a nonwoven layer having generally opposed first and second major surfaces and lengthwise generally opposed first and second edges, wherein the nonwoven layer comprises inorganic fibers , and having a binder content of no greater than 7% by weight, based on the total weight of the nonwoven layer, wherein at least one seam is present. For example, the nonwoven layer may be used in mounting mats for pollution control devices.

Description

Background technique [0001] Pollution control devices such as catalytic converters for gasoline engines have been around for more than 30 years. Over the past few years, stricter regulations for diesel vehicles have led to a rapid adoption of other pollution control devices, including diesel oxidation catalysts (DOC), diesel particulate filters (DPF) and selective catalyst reduction devices (SCR) Increase. 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 portion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/28
CPCD04H1/52D04H1/593F01N3/2853F01N3/2857Y10T428/24033B01D39/08D04H1/4209D04H1/45D04H1/58F01N3/28
Inventor 安妮·N·德罗韦雷小金·C·萨克斯
Owner 3M INNOVATIVE PROPERTIES CO