WO2023238591A1 - マット材、排ガス浄化装置及び排ガス浄化装置の製造方法 - Google Patents

マット材、排ガス浄化装置及び排ガス浄化装置の製造方法 Download PDF

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Publication number
WO2023238591A1
WO2023238591A1 PCT/JP2023/017666 JP2023017666W WO2023238591A1 WO 2023238591 A1 WO2023238591 A1 WO 2023238591A1 JP 2023017666 W JP2023017666 W JP 2023017666W WO 2023238591 A1 WO2023238591 A1 WO 2023238591A1
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WIPO (PCT)
Prior art keywords
mat material
inorganic
binder
exhaust gas
mat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/017666
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English (en)
French (fr)
Japanese (ja)
Inventor
眞太朗 宮崎
孝太朗 樽谷
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Ibiden Co Ltd
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Ibiden Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ibiden Co Ltd filed Critical Ibiden Co Ltd
Priority to US18/872,273 priority Critical patent/US20250354511A1/en
Priority to JP2024526318A priority patent/JPWO2023238591A1/ja
Priority to EP23819575.4A priority patent/EP4537934A4/en
Priority to CN202380044439.1A priority patent/CN119317770A/zh
Publication of WO2023238591A1 publication Critical patent/WO2023238591A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/0211—Arrangements for mounting filtering elements in housing, e.g. with means for compensating thermal expansion or vibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2350/00—Arrangements for fitting catalyst support or particle filter element in the housing
    • F01N2350/02—Fitting ceramic monoliths in a metallic housing
    • F01N2350/04—Fitting ceramic monoliths in a metallic housing with means compensating thermal expansion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/02—Fitting monolithic blocks into the housing

Definitions

  • the present invention relates to a mat material, an exhaust gas purification device, and a method for manufacturing an exhaust gas purification device.
  • Exhaust gas emitted from internal combustion engines such as diesel engines contains particulate matter (hereinafter also referred to as PM), and in recent years, it has become a problem that this PM is harmful to the environment and the human body. Moreover, since the exhaust gas also contains harmful gas components such as CO, HC, and NOx, there are concerns about the effects of these harmful gas components on the environment and the human body.
  • PM particulate matter
  • an exhaust gas treatment body made of porous ceramic such as silicon carbide or cordierite and an exhaust gas treatment body are housed.
  • Various exhaust gas purification devices have been proposed that include a casing and a mat material made of an inorganic fiber aggregate disposed between an exhaust gas treatment body and the casing. This type of mat material is used to prevent the exhaust gas treatment body from coming into contact with the casing that covers its outer periphery and damage it due to vibrations and shocks caused by driving, etc., and to prevent damage between the exhaust gas treatment body and the casing.
  • the main purpose is to prevent exhaust gas from leaking.
  • the mat material is made of inorganic fibers, and the basic shape of the mat material when viewed from above is a rectangular shape consisting of a long side extending in the longitudinal direction and a short side substantially perpendicular to the long side, and one short side of the rectangle A concave portion is formed on the other short side, and a convex portion having a shape similar to the shape cut by the concave portion is formed on the other short side, and the mat material is wrapped around the exhaust gas treatment body to remove the convex portion. By fitting into the recess, exhaust gas is prevented from leaking from the mat material.
  • the exhaust gas treatment body wrapped with the mat material is press-fitted into the casing and assembled into the exhaust gas purification device.
  • Patent Document 1 discloses that by using a sheet material (mat material) having an average unevenness difference h in the range of 0.4 mm ⁇ h ⁇ 9 mm on the first surface, the sheet material and another member can be separated. It is disclosed that by reducing the contact area of the sheet material, it becomes possible to easily install the sheet material in a predetermined position without using a surface lubricant.
  • Patent Document 1 does not mention anything about the detailed dimensions of the concave portion and the convex portion, and when the mat material was prepared and press-fitted, a portion of the mat material disposed on the most upstream side of the fitting portion was deformed. When the exhaust gas treatment body is fixed in a predetermined position, a part of the mat material may protrude from the casing.
  • the present invention was made to solve the above problems, and an object of the present invention is to provide a mat material that is less likely to protrude from a casing during press-fitting.
  • the mat material of the present invention is a mat material containing inorganic fibers and having a substantially rectangular shape in a plan view, and the mat material has a first main surface and a second main surface facing each other in the thickness direction, and a winding direction. a first end face and a second end face facing each other in the longitudinal direction, and a first side face and a second side face facing each other in the thickness direction and the width direction perpendicular to the longitudinal direction; In some cases, a convex portion that protrudes toward the second end surface and non-protruding portions that are arranged on both sides of the convex portion in the width direction and do not protrude toward the second end surface are formed.
  • the two end faces include a recess corresponding to the shape of the convex part of the first end face, and a recess that is arranged on both sides of the recess in the width direction and corresponds to the shape of the non-protruding part of the first end face.
  • a non-concave part is formed, and the ratio [D/C] of the length [D] of the non-concave part in the width direction to the length [C] of the non-concave part in the longitudinal direction is , 1.0 or more.
  • the shapes of the convex portion of the first end surface and the concave portion of the second end surface correspond to each other, and the shapes of the non-protruding portion of the first end surface and the non-concave portion of the second end surface correspond to each other.
  • the non-sinking portion is less likely to be deformed by shear force as it is closer to the mat material main body (portions other than the convex portions and non-sinking portions), and the farther from the mat material main body is, the more likely it is to be deformed due to shear force. That is, it can be said that the shorter the length of the non-sinking portion, the more difficult the non-sinking portion is to deform.
  • the width of the non-concave portion (distance equivalent to the length from the first side surface or the second side surface to the concave portion) increases, the area where the non-concave portion is fixed to the mat material body becomes longer, so that shearing It can be said that deformation due to this phenomenon is less likely to occur. That is, it is considered that the ease with which the non-sinking portion deforms can be improved by adjusting the length and width of the non-sinking portion. Further, even if there are a plurality of convex portions on the first end surface and a plurality of concave portions on the second end surface, the above-mentioned effects can be obtained.
  • the ratio [D/C] of the length [D] of the non-recessed portion in the width direction to the length [C] of the non-recessed portion in the longitudinal direction is 1.0 or more.
  • the length [C] of the non-sinking part in the longitudinal direction is relatively short, and the length [D] of the non-sinking part in the width direction is relatively long. It can be said that it has a good configuration. Therefore, when the shape of the mat material satisfies the above conditions, the non-concave portion becomes difficult to deform due to the shear force during press-fitting, and becomes difficult to protrude from the casing.
  • the mat material of the present invention is preferably a needle mat.
  • the mat material has a plurality of intertwined points formed by needling on at least one of the front surface or the back surface, and within a 25 mm x 25 mm area, there is a 4 mm x 4 mm area in which the above intertwined points are not present. It is preferable that at least one of the first region, which is the region, and the second region, which is the region of 3 mm x 8 mm where the intersecting point does not exist, is arranged. When the first region and/or the second region are arranged within a 25 mm x 25 mm area, the surface pressure of the mat material can be increased.
  • the average fiber length of the inorganic fibers is preferably 1 to 150 mm.
  • the mat material of the present invention is preferably a paper-made mat.
  • the average fiber length of the inorganic fibers is preferably 200 to 20,000 ⁇ m.
  • an inorganic binder is attached to the surface of the inorganic fibers.
  • an inorganic binder is attached to the surface of the inorganic fiber, the frictional resistance between the inorganic fibers increases due to the inorganic binder attached to the surface of the inorganic fiber, so that the holding force can be increased.
  • an organic binder is attached to the surface of the inorganic fiber.
  • an organic binder is attached to the surface of the inorganic fibers, it is possible to improve the adhesion between the inorganic fibers and prevent the inorganic fibers from scattering during handling of the mat material.
  • the mat material of the present invention preferably further contains a polymeric dispersant.
  • the organic binder and the inorganic binder can be easily attached to the surface of the inorganic fibers in a dispersed state.
  • the inorganic binder and the organic binder are attached to the surface of the inorganic fibers in a dispersed state.
  • the inorganic binder and the organic binder are attached to the surface of the inorganic fiber in a dispersed state, the inorganic binder becomes dispersed in the film formed by the organic binder. Since the coating in this state has excellent mechanical strength, it can prevent the inorganic fibers from slipping against each other and increase the holding power.
  • the coating layer is formed by a continuous scale-like mixture of the inorganic binder and the organic binder.
  • the coating layer is formed of the above-mentioned scale-like mixture, the surface roughness of the coating layer increases due to the scale-like mixture, so that the frictional resistance between the inorganic fibers can be further increased.
  • the coating layer preferably has a multi-stage shape.
  • the frictional resistance between the inorganic fibers can be further increased.
  • a particulate mixture of the inorganic binder and the organic binder adhere to the surface of the coating layer.
  • a particulate mixture of an inorganic binder and an organic binder is attached to the surface of the coating layer, the frictional resistance between the inorganic fibers can be further increased compared to the case where the coating layer is used alone.
  • the exhaust gas purification device of the present invention is an exhaust gas purification device having a casing, an exhaust gas treatment body, and a mat material disposed between the casing and the exhaust gas treatment body, wherein the mat material is the mat of the present invention. It is characterized by being made of wood.
  • the exhaust gas purification device of the present invention includes the mat material of the present invention, the mat material does not protrude during press-fitting, and the exhaust gas treatment body has excellent stability.
  • the method for manufacturing an exhaust gas purification device of the present invention includes a press-fitting step in which the mat material of the present invention is wound around an exhaust gas treatment body and then press-fitted into a casing by a hard stuffing method, a pre-calibration method, or a post-calibration method. It is characterized by comprising.
  • the hard stuffing method, pre-calibration method, and post-calibration method all require a step of press-fitting an exhaust gas treatment body wrapped with a mat material into a casing. Therefore, the mat material of the present invention can suppress displacement and deformation of the mat material during press-fitting, and is therefore particularly suitable for the above method.
  • FIG. 1 is a perspective view schematically showing an example of a mat material according to the present invention.
  • FIG. 2 is a perspective view schematically showing an example of the process of winding the mat material shown in FIG. 1 around an exhaust gas treatment body.
  • FIG. 3 is a perspective view schematically showing an example of a wound body prepared in the process shown in FIG. 2.
  • FIG. 4 is a schematic diagram showing an example of a press-fitting process of press-fitting the wound body shown in FIG. 3 into a casing.
  • FIG. 5 is a schematic diagram showing an example of the arrangement of intertwining points in the mat material of the present invention.
  • FIG. 6 is a schematic diagram showing an example of a mat material in which intertwining points are uniformly arranged.
  • FIG. 1 is a perspective view schematically showing an example of a mat material according to the present invention.
  • FIG. 2 is a perspective view schematically showing an example of the process of winding the mat material shown in FIG. 1 around an exhaust gas treatment body.
  • FIG. 7 is an example of an enlarged electron microscope image of the mat material of the present invention.
  • FIG. 8 is another example of an enlarged electron microscope image of the mat material of the present invention.
  • FIG. 9 is yet another example of an enlarged electron microscope image of the mat material of the present invention.
  • FIG. 10 is yet another example of an enlarged electron microscope image of the mat material of the present invention.
  • FIG. 11 is a conceptual diagram schematically showing a shear failure load test device.
  • FIG. 12 is a cross-sectional view schematically showing an example of the exhaust gas purification device of the present invention.
  • the mat material of the present invention is a substantially rectangular mat material in a plan view containing inorganic fibers, and the mat material has a first main surface and a second main surface facing each other in the thickness direction, and a longitudinal direction in the winding direction. It has a first end face and a second end face facing each other in the direction, and a first side face and a second side face facing each other in the width direction perpendicular to the thickness direction and the longitudinal direction, and the first end face has a side surface that faces the width direction perpendicular to the thickness direction and the longitudinal direction.
  • a convex portion that protrudes toward the second end surface, and non-protruding portions that are arranged on both sides of the convex portion in the width direction and do not protrude toward the second end surface are formed, and the second end surface
  • a recessed portion is formed, and a ratio [D/C] of the length [D] of the non-recessed portion in the width direction to the length [C] of the non-recessed portion in the longitudinal direction is 1. .0 or more.
  • FIG. 1 is a perspective view schematically showing an example of a mat material according to the present invention.
  • the mat material 10 has a first main surface 11 and a second main surface 12 that face each other in the thickness direction (the direction indicated by the double-headed arrow T in FIG. 1), and a longitudinal direction (the direction in which it is wrapped)
  • the first end surface 13 and the second end surface 14 face each other in the direction shown by double arrow A in FIG. 1), and the second end surface 14 faces each other in the width direction (direction shown by double arrow B in FIG. It has a substantially rectangular flat plate shape when viewed from above, and has a first side surface 15 and a second side surface 16.
  • the length of the mat material 10 is the length indicated by the double-headed arrow A in FIG.
  • the width of the mat material 10 is the length indicated by the double-headed arrow B in FIG.
  • the thickness of the mat material 10 is the length indicated by the double-headed arrow T in FIG.
  • the first end surface 13 includes a convex portion 13a that protrudes toward the second end surface 14 during winding, and non-protrusive portions 13b and 13c that do not protrude toward the second end surface 14, which are disposed on both sides of the convex portion 13a in the width direction. is formed.
  • the second end face 14 has a recess 14a corresponding to the shape of the convex part 13a of the first end face 13 during winding, and non-protruding parts 13b and 13c of the first end face 13 arranged on both sides of the recess 14a in the width direction.
  • Non-concave portions 14b and 14c corresponding to the shapes are formed.
  • the length of the convex portion 13a in the longitudinal direction (hereinafter also simply referred to as the length of the convex portion 13a) is the length indicated by the double arrow C.
  • the shape of the convex portion 13a corresponds to the shape of the concave portion 14a. Therefore, the length of the recess 14a in the longitudinal direction (hereinafter also simply referred to as the length of the recess 14a) is the length shown by the double arrow C.
  • the length of the recess 14a in the width direction (hereinafter also simply referred to as the width of the recess 14a) is the length shown by the double arrow E.
  • the shape of the concave portion 14a corresponds to the shape of the convex portion 13a. Therefore, the length of the protrusion 13a in the width direction (hereinafter also simply referred to as the width of the protrusion 13a) is the length indicated by the double arrow E. Further, the center of the convex portion 13a in the width direction coincides with the center of the concave portion 14a in the width direction.
  • the length of the non-sinking portions 14b, 14c in the longitudinal direction (hereinafter also simply referred to as the length of the non-sinking portions 14b, 14c) is the length indicated by the double-headed arrow C, the same as the length of the recess 14a in the longitudinal direction. . Further, the length of the non-sinking portions 14b, 14c in the width direction (hereinafter also simply referred to as the width of the non-sinking portions 14b, 14c) is the length indicated by the double-headed arrow D.
  • the length of the non-protruding parts 13b, 13c in the width direction (hereinafter also simply referred to as the width of the non-protruding parts 13b, 13c) is the same as the length of the non-recessed parts 14b, 14c in the width direction, as indicated by the double-headed arrow D. It is.
  • the portion of the mat material 10 excluding the convex portion 13a and the non-concave portions 14b and 14c is also referred to as the main body portion of the mat material.
  • the length [A] of the mat material in the longitudinal direction corresponds to the length from the first end surface to the second end surface in each cross section when the mat material is cut along a plane parallel to the longitudinal direction and the thickness direction. do.
  • the length of the recessed portion 14a in the longitudinal direction is the same as the length of the non-depressed portions 14b and 14c in the longitudinal direction. Further, the length of the recess 14a in the longitudinal direction is the same as the length of the protrusion 13a in the longitudinal direction. Further, the lengths of the non-concave portions 14b, 14c in the width direction are the same as the lengths of the non-protrusion portions 13b, 13c in the width direction.
  • the mat material according to the present invention has a ratio [D/C] of the length [D] of the non-concave part in the width direction to the length [C] of the non-concave part in the longitudinal direction of 1.0 or more.
  • a ratio [D/C] of the length [D] of the non-protruding portion in the width direction to the length [C] of the convex portion in the longitudinal direction is 1.0 or more.”
  • the ratio [D/C] of the length [D] of the non-depressed portion in the width direction to the length [C] of the non-depressed portion in the longitudinal direction is preferably 1.2 or more. It is preferably 1.6 or more, and more preferably 1.6 or more.
  • the center [E C ] of the recess in the width direction may or may not overlap the center [B C ] of the mat material in the width direction.
  • the width of the non-sinking portion 14c is the same as the width of the non-sinking portion 14b, which is the length indicated by the double-headed arrow D.
  • the width of the non-protruding portion 13c is the same as the width of the non-protruding portion 13b, which is the length indicated by the double-headed arrow D.
  • the widthwise center [E C ] of the concave portion does not overlap the widthwise center [B C ] of the mat material, the widths of the two non-concave portions do not match.
  • the width of one non-recessed portion is shorter than the width of the other non-recessed portion.
  • the mat material 10 is wound so that the first main surface 11 of the mat material 10 is in contact with the exhaust gas treatment body 230, but the second main surface 12 of the mat material 10 is in contact with the exhaust gas treatment body 230. It may be wrapped like this.
  • FIG. 4 is a schematic diagram showing an example of a press-fitting process of press-fitting the wound body shown in FIG. 3 into a casing.
  • FIG. 4 shows how the wrapped body 250 shown in FIG. 3 is press-fitted into the casing 220.
  • the direction in which the wrapped body 250 is press-fitted is from the top to the bottom of the paper. Therefore, of the two side surfaces (first side surface 15 and second side surface 16) of the mat material 10, the second side surface 16 is arranged on the downstream side in the press-fitting direction, and the first side surface 15 is arranged on the upstream side in the press-fitting direction. It can be said that
  • a large shearing force is applied to the mat material 10 due to the friction between the mat material 10 and the casing 220 and the friction between the mat material 10 and the exhaust gas treatment body 230. Specifically, a force is applied that pulls the surface of the mat material 10 constituting the wrapped body 250 toward the upstream side in the press-fitting direction.
  • the magnitude of deformation of the convex portions and non-concave portions due to shear force is determined by the order of arrangement in the press-fitting direction and the connection area (distance) with the portion that will become the main body of the mat material. That is, the more upstream in the press-fitting direction, the greater the deformation, and the shorter the connection area (distance) between the mat material and the main body, the greater the deformation.
  • the non-concave portion 14b of the mat material 10 is the most upstream portion in the press-fitting direction, and is a portion that is easily deformed by shear force.
  • the ratio [D/C] of the length [D] of the non-depressed portion in the width direction to the length [C] of the non-depressed portion in the longitudinal direction is 1.0 or more. Therefore, regardless of the orientation of the mat material, it is possible to suppress deformation of the non-concave portion disposed on the upstream side in the press-fitting direction.
  • the side surface of the mat material where the non-concave part with the short width direction is arranged will be on the downstream side in the press-fitting direction. It is preferable that the side surface of the mat material on which the non-concave portion having a long length in the width direction is disposed is disposed on the upstream side in the press-fitting direction.
  • the mat material will have two non-concave portions with different lengths.
  • the width of one non-depressed part is D 1 and the width of the other non-depressed part is D 2 and D 1 > D 2
  • the width of the non-depressed part with the shorter width that is, the width of the other non-depressed part is D 1 .
  • the ratio [D 2 /C] of the length [D 2 ] of the non-sinking portion in the width direction of D 2 to the length [C] of the non-sinking portion in the longitudinal direction is 1.0 or more, the present invention is applicable. Included in mat material.
  • the ratio [A/C] of the length [A] of the mat material in the longitudinal direction to the length [C] of the non-concave part in the longitudinal direction is not particularly limited, but it should be 10 or more. is preferred.
  • the ratio [A/C] of the length [A] of the mat material in the longitudinal direction to the length [C] of the non-sinking part in the longitudinal direction is 10 or more, the shape of the non-sinking part will be deformed during press-fitting. It becomes a difficult shape. Note that the ratio [A/C] in the mat material 10 shown in FIG. 1 is 10.1.
  • the length [C] of the non-concave portion in the longitudinal direction is the same as the length [C] of the concave portion and the length [C] of the convex portion in the longitudinal direction. Therefore, the feature of the mat material of the present invention is that "the ratio [A/C] of the length [A] of the mat material in the longitudinal direction to the length [C] of the non-concave part in the longitudinal direction is 10 or more.”"The ratio [A/C] of the length [A] of the mat material in the longitudinal direction to the length [C] of the convex part in the longitudinal direction is 10 or more" or "The length of the mat material in the longitudinal direction In other words, the ratio [A/C] of the length [A] to the length [C] of the recess in the longitudinal direction is 10 or more.
  • the number of protrusions formed on the first end surface and the number of recesses formed on the second end surface of the mat material may be two or more.
  • the length in the width direction of the non-sinking part is The ratio [D/C] between the length [D] and the length [C] in the length direction of the non-sinking portion is determined.
  • the above-mentioned ratio [D/C] in the non-concave part located at the position closest to the first side surface of the mat material and the above-mentioned ratio [D/C] at the non-concave part located at the position closest to the second side surface of the mat material C] of 1.0 or more corresponds to the mat material of the present invention.
  • the thickness of the mat material is not particularly limited, but is preferably 2 to 40 mm. If the thickness of the mat material exceeds 40 mm, the mat material loses its flexibility, making it difficult to handle when wrapping the mat material around an exhaust gas treatment body. In addition, the mat material tends to wrinkle and crack. If the thickness of the mat material is less than 2 mm, the holding power of the mat material will be insufficient and the exhaust gas treatment body will easily fall off. Further, when a volume change occurs in the exhaust gas treatment body, the mat material becomes difficult to absorb the volume change of the exhaust gas treatment body. Therefore, cracks and the like are likely to occur in the exhaust gas treatment body.
  • the mat is composed of inorganic fibers.
  • the inorganic fiber is not particularly limited, it is preferable that the inorganic fiber is composed of at least one selected from the group consisting of alumina fiber, silica fiber, alumina-silica fiber, mullite fiber, biosoluble fiber, and glass fiber.
  • the inorganic fiber is at least one of alumina fiber, silica fiber, alumina-silica fiber, and mullite fiber, it has excellent heat resistance, so that when the exhaust gas treatment body is exposed to a sufficiently high temperature, However, no deterioration or the like occurs, and the function as a mat material can be sufficiently maintained.
  • the inorganic fibers are biosoluble fibers, even if the scattered inorganic fibers are inhaled when making an exhaust gas purification device using the mat material, they will dissolve in the body, making it difficult for workers to use them. No harm to health.
  • the alumina fiber may contain additives such as calcia, magnesia, and zirconia.
  • the mat can be manufactured by a needling method or a papermaking method.
  • Mats produced by the needling method are also referred to as needle mats, and mats produced by the papermaking method are also referred to as papermaking mats.
  • the average fiber length of the inorganic fibers is preferably 1 to 150 mm, more preferably 10 to 80 mm. If the average fiber length of the inorganic fibers is less than 1 mm, the fiber length of the inorganic fibers will be too short, resulting in insufficient entanglement of the inorganic fibers, reducing the ability to wrap around the exhaust gas treatment body, and making the mat material more likely to crack. . Furthermore, when the average fiber length of the inorganic fibers exceeds 150 mm, the fiber length of the inorganic fibers is too long, so the number of fibers constituting the mat material decreases, and the denseness of the mat material decreases. As a result, the shear strength of the mat material decreases.
  • the average fiber length of the inorganic fibers is preferably 200 to 20,000 ⁇ m, more preferably 300 to 10,000 ⁇ m, and even more preferably 500 to 1,500 ⁇ m.
  • intertwined points are formed on the front or back surface of the mat material.
  • the density ⁇ of the intertwined points is preferably in the range of 0.5 pieces/cm 2 ⁇ 18 pieces/cm 2 .
  • the density ⁇ of the interlacing points is the interlacing points measured on the main surface of the front or back surface, whichever has a higher density of interlacing points.
  • the needling method within a 25 mm x 25 mm area on the front or back side of the mat material, there is a first area of 4 mm x 4 mm in which no intertwined points exist, and a 3 mm x 8 mm area in which no intertwined points exist. It is preferable that at least one of the second regions is arranged. By arranging at least one of the first region and the second region, high surface pressure is exerted. Note that the main surface of the mat material for determining whether the first region and/or the second region is arranged is the same main surface as the main surface for measuring the density of the intertwining points.
  • FIG. 5 is a schematic diagram showing an example of the arrangement of intertwining points in the mat material of the present invention.
  • the mat material 10 shown in FIG. 5 has dimensions of 25 mm x 25 mm in plan view.
  • a plurality of interlacing points 115 are arranged unevenly. Therefore, the first area 117 is a 4 mm x 4 mm area (the area indicated by the solid square in FIG. 5) where the interlacing point 115 does not exist, and the 3 mm x 8 mm area (indicated by the solid square in FIG. 5) where the intersecting point 115 does not exist. , a region indicated by a dashed rectangle) is arranged. Note that FIG. 5 does not illustrate all of the first region 117 and the second region 118.
  • FIG. 6 is a schematic diagram showing an example of a mat material in which intertwining points are uniformly arranged.
  • the mat material 10 shown in FIG. 6 has dimensions of 25 mm x 25 mm in plan view.
  • the interlacing points 115 are uniformly spaced at 2.8 mm intervals.
  • Both the 4 mm x 4 mm square and the 3 mm x 8 mm rectangle shown in FIG. 6 include one or more intertwining points.
  • a square of 4 mm x 4 mm that does not correspond to the first area and a rectangle of 3 mm x 8 mm that does not correspond to the second area are marked with an "x". Therefore, neither the first region nor the second region can be arranged on the mat material shown in FIG. 6 .
  • the method for counting the number of first areas and second areas within a 25 mm x 25 mm area is as follows. (1) Find a 4 mm x 4 mm area (first area) in which no intertwined points are formed. At this time, the plurality of first regions are selected so that they do not overlap with each other. (2) Find a 3 mm x 8 mm area (second area) in which no intertwined points are formed. At this time, the plurality of second regions are selected so that they do not overlap with each other. However, the second area may overlap the first area. When the second region and the first region overlap, the area where no intertwining points are present becomes larger, so that the surface pressure of the mat material can be increased.
  • a plurality of first regions and/or second regions are arranged in a 25 mm x 25 mm area.
  • the surface pressure of the mat material can be increased.
  • a plurality of first regions and/or second regions are arranged when the number of first regions and the number of second regions is two or more in total, and a plurality of first regions are arranged. This includes a case where a plurality of second regions are arranged, a case where a plurality of first regions and a plurality of second regions are arranged, and the like.
  • a third area which is a 4 mm x 4 mm area in which four or more interlacing points exist, is arranged within a 25 mm x 25 mm area on the front or back surface of the mat material.
  • the inorganic fibers are strongly intertwined with each other in this region, so that the shear strength of the mat material can be increased.
  • the method for counting the number of third regions within the 25 mm x 25 mm region is the same as the method for counting the number of first regions described above.
  • an inorganic binder also referred to as an inorganic binder
  • an inorganic binder is attached to the surface of the inorganic fiber.
  • the frictional resistance between the inorganic fibers increases due to the inorganic binder attached to the surface of the inorganic fiber, so that the holding force can be increased.
  • examples of the inorganic binder include alumina sol and silica sol.
  • an organic binder also referred to as an organic binder
  • an organic binder is attached to the surface of the inorganic fiber.
  • an organic binder is attached to the surface of the inorganic fibers, it is possible to improve the adhesion between the inorganic fibers and prevent the inorganic fibers from scattering during handling of the mat material.
  • organic binder examples include acrylic resin, acrylate latex, rubber latex, water-soluble organic polymers such as carboxymethyl cellulose or polyvinyl alcohol, thermoplastic resins such as styrene resin, and thermosetting resins such as epoxy resin.
  • an inorganic binder and an organic binder are attached to the surface of the inorganic fiber.
  • an inorganic binder is attached to the surface of the inorganic fiber
  • the frictional resistance between the inorganic fibers increases due to the inorganic binder attached to the surface of the inorganic fiber, so that the holding force can be increased.
  • an organic binder is attached to the surface of the inorganic fibers, the adhesion between the inorganic fibers can be improved, and it is possible to prevent the inorganic fibers from scattering during handling of the mat material.
  • the weight ratio of the inorganic binder to the mat material is preferably more than 0 wt% and 10 wt% or less. When the weight ratio of the inorganic binder to the mat material is within the above range, the holding force can be sufficiently increased.
  • the weight ratio of the organic binder to the mat material is preferably more than 0 wt% and 10 wt% or less. When the weight ratio of the organic binder to the mat material is within the above range, both the effect of preventing fiber scattering and the high holding power can be achieved.
  • the content of the organic binder and inorganic binder contained in the mat material can be measured, for example, by the following method. First, a fixed weight sample of the mat material whose content is to be measured is taken. Next, an organic solvent (for example, tetrahydrofuran) in which the organic binder contained in the sample is dissolved is selected, and the organic binder is dissolved in a Soxhlet extractor and separated from the sample. At this time, the inorganic binder contained in the dissolved organic binder is also separated from the sample, and the organic binder and the inorganic binder are recovered in the organic solvent. Next, an organic solvent consisting of the organic binder and the inorganic binder is placed in a crucible, and the organic solvent is evaporated off by heating.
  • an organic solvent for example, tetrahydrofuran
  • the residue remaining in the crucible is regarded as the total weight of the organic binder and the inorganic binder relative to the mat material, and the content (% by weight) relative to the weight of the mat material is calculated. Furthermore, the crucible is heat-treated at 600° C. for 1 hour to burn out the organic binder. Since the inorganic binder remains in the crucible, this is regarded as the content (% by weight) of the inorganic binder relative to the total of the organic binder and the inorganic binder, and the content is calculated. The remainder is the content (% by weight) of the organic binder.
  • the inorganic binder and the organic binder are each attached to the surface of the inorganic fibers in a dispersed state.
  • the inorganic binder and the organic binder are attached to the surface of the inorganic fiber in a dispersed state, the inorganic binder becomes dispersed in the film formed by the organic binder. Since the coating in this state has excellent mechanical strength, it can prevent the inorganic fibers from slipping against each other and increase the holding power.
  • the surface of the inorganic fibers be covered with a coating layer made of a mixture of an inorganic binder and an organic binder.
  • a coating layer made of a mixture of an inorganic binder and an organic binder has higher mechanical strength than a coating layer made only of an organic binder. Therefore, the coating layer is less likely to peel off, and the frictional resistance between the inorganic fibers can be increased.
  • the coating layer is preferably formed by a continuous scale-like mixture (a mixture of an inorganic binder and an organic binder).
  • a continuous scale-like mixture a mixture of an inorganic binder and an organic binder.
  • FIG. 7 is an example of an enlarged electron microscope image of the mat material of the present invention.
  • a part of the surface of the inorganic fiber 120 is covered with a coating layer 130 made of a mixture of an inorganic binder and an organic binder.
  • the covering layer 130 is formed by a continuous scale-like mixture of an inorganic binder and an organic binder.
  • a particulate mixture 140 of an inorganic binder and an organic binder is attached to the surface of the inorganic fiber 120 . Note that whether or not the coating layer or particles are made of a mixture of an inorganic binder and an organic binder can be confirmed by combined use of field observation using an electron microscope and elemental analysis.
  • FIG. 8 is another example of an enlarged electron microscope image of the mat material of the present invention.
  • a part of the surface of the inorganic fiber 120 is covered with a coating layer 130 made of a mixture of an inorganic binder and an organic binder.
  • the covering layer 130 is formed by a continuous scale-like mixture of an inorganic binder and an organic binder.
  • a particulate mixture 140 of an inorganic binder and an organic binder is attached to the surface of the inorganic fiber 120 .
  • the thickness of the coating layer may be uniform, but it does not need to be uniform.
  • the shape of the coating layer whose thickness is not constant is also called multistage.
  • the covering layer has a multi-stage shape, it can be said that the covering layer has irregularities on the surface, so that the frictional resistance between the inorganic fibers can be further increased.
  • the surface of the inorganic fiber is magnified 3000 times using a scanning electron microscope. This is determined by checking the presence or absence of irregularities on the surface.
  • FIG. 9 is yet another example of an enlarged electron microscope image of the mat material of the present invention.
  • a part of the surface of the inorganic fiber 120 is covered with a coating layer 130 made of a mixture of an inorganic binder and an organic binder.
  • the thickness of the covering layer 130 is not uniform, and is multi-stepped.
  • a particulate mixture 140 of an inorganic binder and an organic binder is attached to the surface of the inorganic fiber 120 .
  • particles made of a mixture of an inorganic binder and an organic binder are attached to the surface of the coating layer.
  • the frictional resistance between the inorganic fibers can be further increased compared to a case where the particles are not attached.
  • FIG. 10 is yet another example of an enlarged electron microscope image of the mat material of the present invention.
  • a part of the surface of the inorganic fiber 120 is covered with a coating layer 130 made of a mixture of an inorganic binder and an organic binder.
  • the covering layer 130 is formed by a continuous scale-like mixture of an inorganic binder and an organic binder.
  • the thickness of the covering layer 130 is not uniform, and is multi-stepped.
  • a particulate mixture 140 of an inorganic binder and an organic binder is attached to the surface of the coating layer 130 .
  • the mat material further contains a polymeric dispersant.
  • the organic binder and the inorganic binder can be easily attached to the surface of the inorganic fibers in a dispersed state.
  • the content of the polymeric dispersant is preferably 50 to 1000 ppm based on the weight of the inorganic fiber.
  • an aggregate made of an inorganic binder and an organic binder is attached to the surface of the inorganic fibers.
  • the aggregate made of the inorganic binder and the organic binder can form irregularities on the surface of the inorganic fibers, so that the friction between the inorganic fibers can be increased and the holding power can be improved.
  • the mat material may further contain an aggregating agent.
  • the organic binder and the inorganic binder can be easily attached to the surface of the inorganic fibers in an agglomerated state.
  • Whether the inorganic binder and organic binder attached to the surface of the inorganic fiber are dispersed or aggregated can be confirmed by observing the surface of the inorganic fiber using a SEM-EDX or the like.
  • the mat material of the present invention preferably has a shear coefficient of 0.20 or more.
  • shear coefficient is 0.20 or more, shearing is less likely to occur in the mat material when the exhaust gas treatment body is press-fitted into a casing using the mat material of the present invention.
  • the shear modulus is obtained by dividing the shear failure load by the relaxed surface pressure.
  • FIG. 11 is a conceptual diagram schematically showing a shear failure load test device.
  • test pieces 1a and 1b are arranged on both sides of a stainless steel plate 173, and the outside thereof is further sandwiched between a left jig 171 and a right jig 172.
  • a large number of protruding members 174 are provided on the surfaces of the left jig 171, the right jig 172, and the stainless steel plate 173 that contact the test piece.
  • test pieces 1a and 1b are fixed to the left jig 171, the right jig 172, and the stainless steel plate 173 by being pierced by the protruding member 174. In this state, the test piece is compressed until its bulk density (GBD) becomes 0.3 g/cm 3 .
  • GBD bulk density
  • the stainless steel plate 173 is moved in the direction shown by the arrow in FIG. It cannot be separated from the pieces 1a and 1b and come off. Therefore, when a shear force greater than the shear failure load of the test pieces is applied to the test pieces 1a and 1b, the test pieces 1a and 1b undergo shear failure. Determine the shear force applied to the stainless steel plate when the test piece undergoes shear failure.
  • the shear failure load (kPa) can be determined.
  • the shear failure load may be measured using a test piece obtained by cutting out a portion of the mat material.
  • Relaxed surface pressure can be measured using the following procedure. First, the mat material is compressed at room temperature until the bulk density becomes 0.3 g/cm 3 , and the load is measured after holding for 20 minutes.
  • the relaxed surface pressure (kPa) can be determined.
  • the above-mentioned relaxation surface pressure may be measured using a test piece obtained by cutting out a part of the mat material.
  • a plate for compressing the mat material is moved at a speed of 1 inch (25.4 mm)/min to compress the mat material until the bulk density becomes 0.3/cm 3 .
  • the bulk density becomes 0.27 g/cm 3 .
  • the mat material of the present invention can be obtained, for example, by performing a cutting step of cutting a mat containing inorganic fibers into a predetermined shape, or a molding step of molding it into a predetermined shape.
  • an inorganic fiber precursor is produced by spinning a spinning mixture containing at least an inorganic compound and an organic polymer.
  • a spinning mixture made of a basic aluminum chloride aqueous solution, silica sol, etc. as raw materials is spun by a blowing method to produce an inorganic fiber precursor having an average fiber diameter of 3 to 10 ⁇ m.
  • the needle arrangement density is preferably set to 0.5 needles/cm 2 or more and less than 18 needles/cm 2 .
  • the positions where the needles are placed in the needle punching process correspond to the interlacing points in the mat. Therefore, by setting the needle arrangement density to 0.5 needles/cm 2 or more and less than 18 needles/cm 2 , one needle punching process can reduce the density of intertwined points ⁇ to 0.5 needles/cm 2 ⁇ Mats in the range ⁇ 18 pieces/cm 2 can be obtained.
  • the needle arrangement density is not limited to the above range.
  • the needles may or may not penetrate the sheet-like material in the thickness direction.
  • the needle punched body is fired to obtain a mat made of inorganic fibers.
  • the temperature at which the needle punched body is fired is not particularly limited, but is preferably 1000°C to 1600°C. Through the above steps, a mat can be obtained.
  • the mat material of the present invention can be obtained by cutting the mat obtained through the above steps into a predetermined shape.
  • an attachment step may be performed in which an inorganic binder and/or an organic binder is attached to the surface of the mat or the inorganic fibers constituting the mat material.
  • examples of the inorganic binder include alumina sol and silica sol.
  • organic binder examples include acrylic resin, acrylate latex, rubber latex, water-soluble organic polymers such as carboxymethyl cellulose or polyvinyl alcohol, thermoplastic resins such as styrene resin, and thermosetting resins such as epoxy resin.
  • polymeric dispersants examples include polycarboxylic acid and/or its salt, naphthalene sulfonate formalin condensate and/or its salt, polyacrylic acid and/or its salt, polymethacrylic acid and/or its salt, polyvinyl sulfone Hydrophilic synthetic polymer substances such as anionic polymer dispersants such as acids and/or their salts, nonionic polymer dispersants such as polyvinyl alcohol, polyvinylpyrrolidone, and polyethylene glycol; gelatin, casein, water-soluble Natural hydrophilic polymeric substances such as starch; hydrophilic semi-synthetic polymeric substances such as carboxymethyl cellulose, and the like.
  • hydrophilic synthetic polymer substances are preferred, and anionic polymer dispersants are more preferred.
  • anionic polymer dispersants are more preferred.
  • only one type of these polymeric dispersants may be used, or a plurality of types may be used in combination.
  • it may be a polymeric dispersant having both a structure exhibiting properties as an anionic polymeric dispersant and a structure exhibiting properties as a nonionic polymeric dispersant.
  • the binder mixture may contain a flocculant. If the binder mixed liquid contains an aggregating agent, the binder will be in a coagulated state in the binder mixed liquid. By bringing the binder mixture in this state into contact with the mat, the binder can be attached to the surface of the inorganic fibers in an aggregated state.
  • the binder mixture may contain a polymeric dispersant. If the binder mixed liquid contains a polymeric dispersant, the binder will be in a dispersed state in the binder mixed liquid. That is, the binder mixed liquid becomes a dispersion liquid in which the binder is dispersed in a dispersion medium. By bringing the binder mixture (dispersion) in this state into contact with the mat, the binder can be attached to the surface of the inorganic fibers in a dispersed state.
  • classification treatment examples include classification treatment using a dry centrifugal classifier (also referred to as a dry cyclone), a wet centrifugal classifier (also referred to as a wet cyclone), and the like.
  • a dry centrifugal classifier also referred to as a dry cyclone
  • a wet centrifugal classifier also referred to as a wet cyclone
  • the exhaust gas discharged from the internal combustion engine and flowing into the exhaust gas purification device 200 (in FIG. 12, the exhaust gas is indicated by G and the flow of the exhaust gas is indicated by arrows) is transferred to an exhaust gas processing body (honeycomb filter) 230.
  • the exhaust gas flows into one cell 231 opened at the exhaust gas inflow side end face 230a of the exhaust gas, and passes through the cell wall 232 that separates the cells 231.
  • PM in the exhaust gas is collected by the cell wall 232, and the exhaust gas is purified.
  • the purified exhaust gas flows out from another cell 231 opened at the exhaust gas outflow side end face 230b and is discharged to the outside.
  • the method for manufacturing an exhaust gas purification device of the present invention includes a press-fitting step of wrapping the mat material of the present invention around an exhaust gas treatment body and then press-fitting it into a casing by a hard stuffing method, a pre-calibration method, or a post-calibration method. It is characterized by
  • the present disclosure (5) is the mat material according to the present disclosure (1), which is a paper-made mat.
  • the present disclosure (12) is the mat material according to the present disclosure (9), wherein an aggregate made of the inorganic binder and the organic binder is attached to the surface of the inorganic fiber.
  • the present disclosure (14) is the mat material according to the present disclosure (13), wherein the coating layer is formed by a continuous scale-like mixture of the inorganic binder and the organic binder.
  • the present disclosure is the mat material according to the present disclosure (13) or (14), wherein the coating layer has a multi-stage shape.
  • the density ⁇ of interlaced points is 9 pieces/cm 2 , and within the 25 mm x 25 mm area, there are 10 first regions of 4 mm x 4 mm where no intersected points exist, and 3 mm x 8 mm where no intersected points exist. There were four second areas arranged.
  • Binder mixture preparation step The organic binder obtained in the above (f-1) organic binder mixture preparation step is mixed with the inorganic binder mixture obtained in the above (f-2) Inorganic binder mixture preparation step.
  • the liquids were added at a weight ratio of 1:1 and thoroughly stirred, so that the organic binder had a solid content concentration of 1.0 wt%, the inorganic binder had a solid content concentration of 1.0 wt%, and the concentration of the polymeric dispersant was 1.0 wt%.
  • a binder mixture solution having a concentration of 500 ppm was prepared.
  • (f-4) Contact step The binder mixture obtained in the above (f-3) binder mixture preparation step was brought into contact with the mat obtained in the (e) cutting step by a curtain coating method.
  • (f-5) Dehydration step The mat obtained in the above (f-4) contact step and to which the binder mixture has been applied is dehydrated by suction using a dehydrator, so that the binder mixture is reduced to 100 parts by weight of inorganic fibers. It was prepared so that 100 parts by weight was added.
  • Example 2 to 6 and Comparative Examples 1 to 3 (e) Mat materials according to Examples 2 to 6 and Comparative Examples 1 to 3 were produced in the same manner as in Example 1, except that the shape to be cut in the cutting process was changed to meet the conditions in Table 1. .
  • [D 1 ] indicates the width of the non-sinking portion on the first side surface side
  • [D 2 ] indicates the width of the non-sinking portion on the second side surface side, respectively.
  • the mat materials according to Examples 4 to 6 and Comparative Example 3 were made by wrapping a wound body with a diameter of 141 mm around an exhaust gas treatment body with a diameter of 129 mm and a length of 105 mm, with a taper angle of 4.5° and an aperture diameter of 145.
  • the mat material was press-fitted into a stainless steel casing with an inner diameter of 145.4 mm at a speed of 500 mm/min so that the first side surface was on the upstream side and the second side surface was on the downstream side.
  • ⁇ Deformation amount (shift amount) is 6 mm or less, and deformation of the mat material is particularly suppressed.
  • Test piece 10 Mat material 11 First main surface 12 Second main surface 13 First end surface 13a Convex portions 13b, 13c Non-protruding portion 14 Second end surface 14a Recessed portions 14b, 14c Non-concave portion 15 First side surface 16 Second Side surface 115 Intertwining point 117 First region 118 Second region 120 Inorganic fiber 130 Covering layer 140 Particulate mixture 170 Shear failure load test device 171 Left jig 172 Right jig 173 Stainless steel plate 174 Projection member 200 Exhaust gas purification device 220 Casing 230 Exhaust gas treatment body 230a Exhaust gas inflow end face 230b Exhaust gas outflow end face 231 Cell 232 Cell wall 233 Sealing material 250 Wrapping body

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
PCT/JP2023/017666 2022-06-09 2023-05-11 マット材、排ガス浄化装置及び排ガス浄化装置の製造方法 Ceased WO2023238591A1 (ja)

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EP23819575.4A EP4537934A4 (en) 2022-06-09 2023-05-11 MAT MATERIAL, EXHAUST GAS PURIFICATION APPARATUS, AND METHOD FOR MANUFACTURING EXHAUST GAS PURIFICATION APPARATUS
CN202380044439.1A CN119317770A (zh) 2022-06-09 2023-05-11 垫材、废气净化装置和废气净化装置的制造方法

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JP2009024615A (ja) * 2007-07-20 2009-02-05 Nichias Corp 触媒コンバーター、触媒コンバーター用保持材及びその製造方法
JP2011241837A (ja) 2006-03-10 2011-12-01 Ibiden Co Ltd シート材および排気ガス浄化装置
JP2015045338A (ja) * 2008-08-29 2015-03-12 ユニフラックス ワン リミテッド ライアビリティ カンパニー フレキシブル縁保護剤を備えた装着マットおよび該装着マットが組込まれた排気ガス処理装置
JP2015063925A (ja) * 2013-09-24 2015-04-09 イビデン株式会社 保持シール材、保持シール材の製造方法、排ガス浄化装置の製造方法、及び、排ガス浄化装置
JP2016108987A (ja) * 2014-12-03 2016-06-20 イビデン株式会社 保持シール材、排ガス浄化装置及び保持シール材の製造方法

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JP6218528B2 (ja) * 2013-09-24 2017-10-25 イビデン株式会社 保持シール材、保持シール材の製造方法、巻付体の圧入方法及び排ガス浄化装置
JPWO2023163009A1 (https=) * 2022-02-28 2023-08-31

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JP2011241837A (ja) 2006-03-10 2011-12-01 Ibiden Co Ltd シート材および排気ガス浄化装置
JP2009024615A (ja) * 2007-07-20 2009-02-05 Nichias Corp 触媒コンバーター、触媒コンバーター用保持材及びその製造方法
JP2015045338A (ja) * 2008-08-29 2015-03-12 ユニフラックス ワン リミテッド ライアビリティ カンパニー フレキシブル縁保護剤を備えた装着マットおよび該装着マットが組込まれた排気ガス処理装置
JP2015063925A (ja) * 2013-09-24 2015-04-09 イビデン株式会社 保持シール材、保持シール材の製造方法、排ガス浄化装置の製造方法、及び、排ガス浄化装置
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EP4537934A4 (en) 2025-10-08

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