Sheet member and exhaust gas processing device and manufacturing method of the same
An exhaust gas treatment device and technology for exhaust gas treatment, which are used in exhaust devices, mufflers, engine components, etc., can solve the problems of reduced sheet density, contradiction between sheet strength and repellency, and inability to obtain sheets. , to achieve the effect of good sealing ability
Inactive Publication Date: 2007-11-21
IBIDEN CO LTD
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Problems solved by technology
Thus the strength of the sheet increases, but the sheet loses its flexibility and the repellency of the sheet decreases
On the other hand, when the number of interweaving points per unit area in the sheet decreases, the flexibility of the sheet increases, thereby improving the repellency of the sheet, but the density of the sheet decreases, resulting in a decrease in strength
Therefore, when the sheet is used as a holding seal of an exhaust gas treatment device, the number of interweaving points and the pattern of the interweaving points need to be determined to satisfy these two characteristics, but the strength and repellency of the sheet are contradictory
However, in the above Patent Document 1, only the arrangement of interlacing points for easily pressing the sheet into the case is considered
Thus, a sheet that optimizes both of the above-mentioned properties cannot be obtained only by such considerations.
Method used
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[0048] Embodiments of the present invention will be described below with reference to the accompanying drawings.
[0049] In FIG. 1 , an example of a sheet 24 of the present invention is shown. However, the sheet of the present invention is not limited to the shape shown in FIG. 1 . Also, FIG. 2 is an example of a configuration diagram for manufacturing the exhaust gas treatment device 10 in which the sheet 24 of the present invention having the shape of FIG. 1 is used as the holding seal 15 of the exhaust gas treatment body 20 .
[0050] As shown in FIG. 1 , the sheet 24 of the present invention has a pair of fitting protrusions 50 and fitting recesses 60 at both edges 70 , 71 perpendicular to the winding direction (X direction). This sheet 24 serves as the retaining seal 15 . When the sheet 24 is wound around the exhaust treatment main body 20 such as a catalyst carrier (catalytic converter), the fitting protrusion 50 and the fitting recess 60 are fitted together as shown ...
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The invention provides a sheet member which has the necessary strength and repulsion capability, and also an exhaust gas processing device having such a sheet member. In the present invention, the sheet member includes inorganic fibers and has multiple inter-woven points formed on at least one of a surface and a back surface of the sheet member formed by a needling process. Density [rho] of the inter-woven points is in a range 0.5 piece / cm2<=[rho]<20 piece / cm2.
Description
technical field [0001] The present invention generally relates to a sheet including inorganic fibers, and a vehicle exhaust treatment device using the sheet as a holding seal. Background technique [0002] Since the beginning of this century, the number of automobiles has greatly increased, and as the number of automobiles has continued to increase, the amount of exhaust gas from automobile engines has also increased surprisingly. In particular, various substances in exhaust gases from diesel engines contribute to environmental pollution, so these substances are currently seriously affecting the global environment. [0003] Under such circumstances, various exhaust gas treatment devices have been proposed and put into practice. A typical exhaust treatment device has a housing (metal shell) in which an exhaust treatment body having many small holes is arranged on an exhaust pipe connected to an exhaust manifold of an engine. Examples of exhaust treatment bodies are catalyst...
Claims
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Inventor 冈部隆彦
Owner IBIDEN CO LTD