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Mat member, exhaust gas treatment apparatus, and muffling apparatus

A waste gas treatment device and waste gas treatment technology, which is applied in the direction of noise reduction device, exhaust device, thin material treatment, etc., can solve the problem of excessive discharge of organic components, and achieve the effect of suppressing the content of organic components and preventing the scattering of inorganic fibers

Active Publication Date: 2009-04-01
IBIDEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, when the resin material is used in the above-mentioned film and needle-shaped member, if the mat material is used as a support sealing material for the device, those resin components contained in the above-mentioned film and needle-shaped member will be destroyed due to the high temperature of the exhaust gas. Thermal decomposition occurs, so that it is inevitable that a considerable amount of inorganic components will be discharged to the outside of the device
[0011] Therefore, as mentioned above, existing mat materials contain a large amount of organic components, and, when such mat materials are used as high temperature parts, for example, are When used as a support sealing material for exhaust gas treatment equipment, it still causes the problem of excessive emission of organic components

Method used

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  • Mat member, exhaust gas treatment apparatus, and muffling apparatus
  • Mat member, exhaust gas treatment apparatus, and muffling apparatus
  • Mat member, exhaust gas treatment apparatus, and muffling apparatus

Examples

Experimental program
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Effect test

no. 1 example

[0105] First, a colloidal silica solution is added to a basic aluminum chloride aqueous solution with an aluminum content of 70 g / l and AL / Cl=1.8 (atomic ratio) so that the composition ratio of the alumina series fibers is Al 2 o 3 :SiO2 2 =72:28, made into alumina series fiber precursors. Secondly, add polyvinyl alcohol to the alumina series fiber precursor. Thereafter, this liquid is concentrated to prepare a spinning solution, and the spinning solution is used for spinning by blow spinning. Among them, the flow rate of the carrier gas was 52 m / s, and the supply rate of the spinning solution was 5.3 ml / h.

[0106] Secondly, fold the alumina series fiber precursor to make the alumina series fiber base material.

[0107] Next, needle punching is performed on the above-mentioned base material. The acupuncture treatment is to set a density of 80 / 100cm 2 The needle plate of the needles is set on one side of the substrate and allows the needles to penetrate the substrate o...

no. 5 example

[0114] A mat was produced in the same manner as in the second example (fifth example). However, in the fifth embodiment, after the sheet having the opening is provided on the first main surface of the substrate, it is reversed, and the sheet having openings is also provided on the entire second main surface of the substrate in the same way. Open sheet. In addition, the sheets provided on both main surfaces are the same as those used in the second embodiment. That is: the pitch of straight lines constituting the frame portion of the sheet (the distance between the centers) is 4 mm in both the X1 direction and the Y1 direction, the maximum length of the openings of the sheet is 5.7 mm, and the opening ratio is 93%.

no. 6 example

[0116] A mat material (sixth embodiment) was produced by the same method as that of the fifth embodiment. However, in the sixth embodiment, the same sheet is also provided in the same way on all end faces of the base material in addition to the two main surfaces of the base material.

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Abstract

A mat member characterized in that the inorganic fibers are hard to be scattered, and when actually used in an exhaust gas treatment apparatus, a smaller amount of organic component are exhausted from the apparatus is disclosed. The mat member includes a base member including inorganic fibers and having first and second main surfaces and a sheet member disposed on at least one of the first and the second main surfaces, wherein an opening is formed on at least a part of a surface of the sheet member.

Description

technical field [0001] The present invention relates to a mat material containing inorganic fibers, and in particular, to a mat material used for exhaust gas treatment devices and noise reduction devices for vehicles and the like. Background technique [0002] The number of automobiles has increased rapidly after entering this century, and at the same time, the amount of exhaust gas emitted by automobile internal combustion engines has also increased rapidly. In particular, various substances contained in diesel engine exhaust gas have become an important cause of pollution and are having a serious impact on the world environment. [0003] Under such circumstances, various exhaust gas treatment devices have been proposed and put into practical use. In a typical exhaust gas treatment device there is a cylindrical member (casing) which is located midway in the exhaust pipe connected to the exhaust manifold of the engine. The box contains an exhaust gas treatment body, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/94F01N3/28
CPCY10T428/24331F01N2310/02F01N2470/02F01N3/2853F01N2310/14F01N3/2857F01N1/10F01N1/24F01N3/28B01D53/86
Inventor 斋木健藏
Owner IBIDEN CO LTD