WO2011002005A1 - マット材および排気ガス処理装置 - Google Patents
マット材および排気ガス処理装置 Download PDFInfo
- Publication number
- WO2011002005A1 WO2011002005A1 PCT/JP2010/061118 JP2010061118W WO2011002005A1 WO 2011002005 A1 WO2011002005 A1 WO 2011002005A1 JP 2010061118 W JP2010061118 W JP 2010061118W WO 2011002005 A1 WO2011002005 A1 WO 2011002005A1
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- WIPO (PCT)
- Prior art keywords
- exhaust gas
- mat
- mat material
- range
- glass fiber
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
- C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/608—Including strand or fiber material which is of specific structural definition
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/608—Including strand or fiber material which is of specific structural definition
- Y10T442/614—Strand or fiber material specified as having microdimensions [i.e., microfiber]
- Y10T442/623—Microfiber is glass
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/696—Including strand or fiber material which is stated to have specific attributes [e.g., heat or fire resistance, chemical or solvent resistance, high absorption for aqueous compositions, water solubility, heat shrinkability, etc.]
Definitions
- the present invention relates to a mat material containing glass fiber, and more particularly to a mat material used for an exhaust gas treatment device of a vehicle or the like.
- a general exhaust gas treatment apparatus is provided with a cylindrical member (casing) in the middle of an exhaust pipe connected to an exhaust gas manifold of an engine, and has an exhaust gas inlet and outlet opening surfaces therein, It has a structure in which an exhaust gas processing body having a large number of fine pores is arranged inside.
- the exhaust gas processing body include a catalyst carrier and an exhaust gas filter such as a diesel particulate filter (DPF).
- DPF diesel particulate filter
- a holding sealing material is installed between the exhaust gas treating body and the casing.
- the holding sealing material is used to prevent damage due to contact between the exhaust gas processing body and the casing during traveling of the vehicle, and to prevent the exhaust gas from leaking from the gap between the casing and the exhaust gas processing body.
- the holding sealing material has a role of preventing the exhaust gas processing body from falling off due to exhaust gas exhaust pressure.
- the exhaust gas treating body needs to be kept at a high temperature in order to maintain the reactivity, and the holding sealing material is also required to have heat insulation performance.
- This mat material is wound around at least a part of the outer peripheral surface excluding the opening surface of the exhaust gas processing body and functions as a holding seal material by being integrally fixed with the exhaust gas processing body by taping or the like. Thereafter, the integrated product is press-fitted into the casing to constitute an exhaust gas processing device.
- the mat material includes inorganic fibers such as alumina fibers and an organic binder, and is manufactured by a needle processing method or a papermaking method.
- inorganic fibers such as alumina fibers and an organic binder
- a mat material using glass fibers such as E-glass instead of alumina fibers (for example, Patent Document 1).
- the conventional mat material using glass fibers such as E-glass has a problem that the initial holding force is low.
- the exhaust gas processing body in the exhaust gas processing apparatus undergoes repeated expansion and contraction cycles as the temperature rises and falls due to the flow and stop of the exhaust gas. Accordingly, the holding sealing material is repeatedly subjected to compression and decompression during use, corresponding to the expansion and contraction behavior of the exhaust gas treating body.
- a mat member using glass fibers such as E-glass has a problem that the holding power of the mat member is greatly reduced when such compression and decompression cycles are repeated.
- the mat material when a mat material using glass fibers such as E-glass is applied to the holding sealing material, the mat material may be damaged due to insufficient initial holding force and / or a decrease in holding power of the mat material over time. There is a possibility that the exhaust gas treating body to be held off.
- the present invention has been made in view of such problems, and in the present invention, although it is a mat material containing glass fibers, the initial holding force is high, and even after receiving a repeated load of compression and restoration, it is relatively
- An object of the present invention is to provide a mat member that maintains a good holding force. It is another object of the present invention to provide an exhaust gas processing apparatus provided with such a mat material as a holding sealing material.
- a mat material containing glass fiber comprising, by weight, 52-62 wt% SiO 2 , 9-17 wt% Al 2 O 3 , 17-27 wt% CaO, 0-9 wt% MgO, 0-4 wt% TiO 2 , and Contains 0-5 wt% ZnO, does not substantially contain B 2 O 3, and the sum of Na 2 O and K 2 O is in the range of 0-2 wt%,
- the glass fiber may not substantially contain fluorine.
- the glass fiber is 59 to 62 wt% SiO 2 , 12 to 15 wt% Al 2 O 3 , 20 to 24 wt% CaO, 1 to 4 wt% MgO, It may contain 0 to 0.9 wt% TiO 2 and substantially no ZnO, and the total of Na 2 O and K 2 O may be in the range of 0 to 1 wt%.
- the glass fiber is 56 to 62 wt% SiO 2 , 9 to 15 wt% Al 2 O 3 , 17 to 25 wt% CaO, 0 to 5 wt% MgO, It may contain 0 to 4 wt% TiO 2 and 0 to 5 wt% ZnO, and the sum of Na 2 O and K 2 O may be in the range of 0 to 1 wt%.
- the average diameter of the glass fibers may be in the range of 9 ⁇ m to 13 ⁇ m.
- the average length of the glass fibers may be in the range of 1 mm to 10 mm, or in the range of 5 mm to 100 mm.
- the mat material according to the present invention may further include an organic binder.
- the mat material according to the present invention may further include an expansion material.
- the expansion agent may include at least one material selected from the group consisting of vermiculite, bentonite, phlogopite, pearlite, expandable graphite, and expandable fluoride mica.
- An exhaust gas treating body having two opening surfaces through which exhaust gas flows;
- a holding sealing material used by being wound around at least a part of an outer peripheral surface excluding an opening surface of the exhaust gas treating body;
- An exhaust gas treatment device comprising: An exhaust gas treatment device is provided in which the holding sealing material is made of a mat material having the above-described characteristics.
- the exhaust gas processing body may be a catalyst carrier or an exhaust gas filter.
- the present invention although it is a mat material containing glass fibers, it is possible to provide a mat material that has a high initial holding force and maintains a relatively good holding force even after repeated loading of compression and restoration. In addition, it is possible to provide an exhaust gas processing apparatus provided with such a mat material as a holding sealing material.
- Example 4 is a graph showing values of initial surface pressure (P 0 ) of samples according to Examples 1 and 2 and Comparative Example 1;
- samples according to Examples 1, 2 and Comparative Example 1 is a graph showing a value of the surface pressure after 1000 cycles (P 1000).
- 6 is a graph showing a temperature change of an initial surface pressure in samples according to Example 3 and Comparative Example 2.
- FIG. 1 shows a schematic perspective view of a mat member according to the present invention.
- FIG. 2 shows a schematic assembly diagram when the exhaust gas treatment apparatus is configured using the mat material shown in FIG. 1 as a holding sealing material.
- the mat member 30 has a long side (side parallel to the X direction) and a short side (side parallel to the Y direction), and is formed to be substantially rectangular. Is done.
- a fitting convex portion 50 and a fitting concave portion 60 are provided, respectively.
- two convex portions 61 are formed at positions adjacent to the fitting concave portion 60 on the short side 71.
- the short sides 70 and 71 of the mat material of the present invention are not limited to the shape of FIG. 1. For example, those having no fitting part as shown in FIG. Those having a plurality of fitting convex portions 50 and fitting concave portions 60 can also be used.
- the “substantially rectangular shape” is a concept including a rectangle having a pair of fitting convex portions 50 and fitting concave portions 60 on the short side as shown in FIG. Further, the “substantially rectangular shape” includes a shape in which a corner portion where the long side and the short side intersect has an angle other than 90 ° (for example, a shape having a curvature).
- this mat member 30 When this mat member 30 is used as the holding sealing member 24, it is used such that the long side direction is the winding direction (X direction in FIG. 1). Further, when the mat member 30 is wound around the exhaust gas processing body 20 such as a catalyst carrier as the holding seal member 24, as shown in FIG. 2, the mating projection 50 and the mating recess 60 of the mat member 30 are provided. And the mat member 30 is fixed to the exhaust gas processing body 20. After that, the exhaust gas processing body 20 around which the holding sealing material 24 is wound is press-fitted into the cylindrical casing 12 made of metal or the like by press-fitting or the like.
- the mat material there is a mat material containing an inorganic fiber such as an alumina fiber and an organic binder, but recently, for example, a glass fiber such as E-glass is used as the inorganic fiber for cost reduction. It has been proposed.
- E-glass means a general term for glasses having the composition shown in the column of “E-glass composition” in Table 1.
- E-glass is 52-62 wt% SiO 2 , 12-16 wt% Al 2 O 3 , 16-25 wt% CaO, 0-5 wt% MgO, 5-10 wt% B 2 by weight.
- O 3 is a glass containing 0 to 1.5 wt% of TiO 2 and having a total of Na 2 O and K 2 O in the range of 0 to 2 wt%.
- a mat material using glass fibers such as E-glass has a problem that initial holding power is lower than a mat material using alumina fibers.
- the exhaust gas processing body in the exhaust gas processing apparatus undergoes repeated expansion and contraction cycles as the temperature rises and falls due to the flow and stop of the exhaust gas. Therefore, the holding sealing material is subjected to repeated compression and decompression loads in use, corresponding to the expansion and contraction behavior of the exhaust gas treating body.
- a mat member using glass fibers such as E-glass has a problem that the holding power of the mat member is greatly reduced when such compression and decompression cycles are repeated.
- the mat material when a mat material using glass fibers such as E-glass is applied to the holding sealing material, the mat material may be damaged due to insufficient initial holding force and / or a decrease in holding power of the mat material over time. There is a possibility that the exhaust gas treating body to be held off.
- the inventors of the present application have so far conducted intensive research and development. And when glass fibers of a specific composition and characteristics are used, the initial holding force is significantly high, and a mat that can maintain a relatively good holding force even after being subjected to repeated compression and decompression loads. The present inventors have found that a material can be obtained and have reached the present invention.
- a mat material containing glass fibers comprise, by weight, 52-62 wt% SiO 2 , 9-17 wt% Al 2 O 3 , 17-27 wt% CaO, 0-9 wt% MgO, 0-4 wt% TiO 2 , and Contains 0-5 wt% ZnO, does not substantially contain B 2 O 3, and the sum of Na 2 O and K 2 O is in the range of 0-2 wt%,
- a mat member having a surface pressure of 100 kPa or more when measured when the temperature of the upper base and the lower base reaches 700 ° C. and 400 ° C., respectively.
- the column of “Glass fiber composition of the present invention” in Table 1 below shows the composition of glass fibers contained in the mat material according to the present invention.
- Glass fibers are 52-62 wt% SiO 2 , 9-17 wt% Al 2 O 3 , 17-27 wt% CaO, 0-9 wt% MgO, 0-4 wt% TiO 2 , and 0 by weight. It contains ⁇ 5 wt% ZnO, substantially does not contain B 2 O 3, and the total of Na 2 O and K 2 O is in the range of 0 to 2 wt%.
- the glass fiber used in the mat material according to the present invention has a feature that it is substantially free of B 2 O 3 .
- B 2 O 3 is considered to have a role of lowering the softening point of glass fibers.
- the present invention because it eliminates the B 2 O 3 from the glass fibers, it is possible to suppress the reduction of the softening point of the glass fibers. Thereby, the intensity
- Such a mat material according to the present invention has a feature that the initial holding force is significantly high. Further, even in an environment that is repeatedly subjected to high temperature compression and decompression, a decrease in holding force is suppressed, and a long holding force can be exhibited.
- the composition of the glass fiber is 59 to 62 wt% SiO 2 , 12 to 15 wt% Al 2 O 3 , 20 to 24 wt% CaO, and 1 to 4 wt% in weight ratio.
- MgO, 0 to 0.9 wt% of TiO 2 , ZnO is not substantially contained, and the total of Na 2 O and K 2 O is in the range of 0 to 1 wt% (also referred to as “first glass fiber composition”). ).
- the composition of the glass fiber is 56-62 wt% SiO 2 , 9-15 wt% Al 2 O 3 , 17-25 wt% CaO, 0-5 wt% MgO, 0-4 wt% TiO by weight ratio. 2 and 0 to 5 wt% ZnO, and the total of Na 2 O and K 2 O is preferably in the range of 0 to 1 wt% (also referred to as “second glass fiber composition”).
- Table 1 described later shows the first and second glass fiber compositions according to the present invention at the same time.
- the mat member 30 according to the present invention may include an organic binder in addition to the glass fiber.
- the organic binder for example, epoxy resin, acrylic resin, rubber resin, styrene resin, and the like can be used.
- the content of the organic binder (the weight of the organic binder relative to the total weight of the mat material) is preferably in the range of 1 to 10 wt%, for example.
- the organic binder impregnated in the mat member contributes to an increase in the amount of organic components discharged from the exhaust gas processor when an exhaust gas processor having such a mat member is used. Therefore, the content of the organic binder is preferably as small as possible.
- the mat material may not be impregnated at all.
- the mat member 30 may further include an expansion material.
- the expansion material preferably has a characteristic of expanding in the range of 400 ° C to 800 ° C.
- expansion material examples include vermiculite, bentonite, phlogopite, pearlite, expandable graphite, and expandable fluoride mica.
- the mat member 30 expands in the range of 400 ° C. to 800 ° C., and thereby, even in a high temperature range exceeding 700 ° C. at which the strength of the glass fiber is reduced.
- the holding power of the mat material can be improved.
- the amount of the expansion material added is not particularly limited, but for example, it is preferably in the range of 10 wt% to 50 wt% with respect to the total weight of the mat material.
- FIG. 3 shows a configuration example of the exhaust gas processing apparatus 10 according to the present invention.
- the exhaust gas processing apparatus 10 is connected to an exhaust gas processing body 20 in which a holding sealing material 24 is wound around an outer peripheral surface, a casing 12 that houses the exhaust gas processing body, and an inlet side and an outlet side of the casing.
- the exhaust gas inlet pipe 2 and the outlet pipe 4 are provided.
- the inlet pipe 2 and the outlet pipe 4 have a tapered shape so that the diameter is expanded at a position where the inlet pipe 2 and the outlet pipe 4 are connected to the casing 12.
- the exhaust gas processing body 20 is a catalyst carrier having an opening surface for inlet and outlet of exhaust gas and having a large number of through holes in a direction parallel to the gas flow.
- the catalyst carrier is made of, for example, honeycomb cordierite.
- the exhaust gas treatment device 10 of the present invention is not limited to such a configuration.
- the exhaust gas treating body 20 may be an exhaust gas filter in which a part of a through hole is sealed, for example, a porous DPF such as porous silicon carbide, porous cordierite, or porous aluminum titanate.
- the holding sealing material 24 is composed of a mat material containing glass fibers as described above. Therefore, the holding sealing material 24 has a good holding force with respect to the exhaust gas processing body 20 in the initial stage. Further, in such an exhaust gas processing apparatus 10, even if a repeated load of compression and restoration is applied to the holding sealing material 24 due to repeated circulation and stop of the exhaust gas, the rate of decrease in the holding force of the holding sealing material 24 is significant. To be suppressed. Therefore, it is possible to prevent the exhaust gas processing body 20 from being displaced from a predetermined position or dropping off after a long period of use, and the reliability of the exhaust gas processing apparatus 10 is improved.
- Method 1 for producing mat material according to the present invention Next, an example of a method for manufacturing a mat material according to the present invention will be described with reference to FIG.
- FIG. 4 is a diagram schematically showing an example of the production flow of the mat material according to the present invention.
- the method for producing a mat material according to the present invention includes: (A) preparing a glass fiber having the composition as described above (S110); (B) Using this glass fiber, a step of preparing a laminated sheet (S120); (C) A step of forming a mat material from the laminated sheet by a needling method (S130); Have
- the mat material is manufactured by the so-called “needling method”.
- the “needling method” is a general term for a method of manufacturing a mat member by inserting and removing a needle from a laminated sheet containing inorganic fibers.
- step S110 glass fibers having the composition as described above are prepared.
- the length of the glass fiber is not particularly limited. However, it is preferable that the glass fiber is relatively long so that the fibers are easily entangled during the subsequent needling treatment.
- the “average length” of the glass fiber is preferably in the range of 5 to 100 mm (for example, 50 mm), for example.
- the “average length” is a value obtained by averaging the total lengths of 100 fibers collected at random.
- the diameter of the glass fiber is not particularly limited.
- the average diameter of the glass fibers is preferably in the range of 9 ⁇ m to 13 ⁇ m (for example, 11 ⁇ m), for example. This “average diameter” is a value obtained by measuring the diameters of 300 fibers collected at random by SEM and averaging them.
- Step S120 a fiber-opening process is performed using the above-described glass fiber, thereby forming a cotton-like laminated sheet.
- the opening process may be performed by, for example, a carding method. In this method, a nonwoven fabric called a web is formed, and a large number of these are laminated to form a laminated sheet.
- Step S130 Next, a mat member is formed from the laminated sheet by a “needling method”.
- a needling device is used for the needling method.
- a needling device is comprised by the needle board which can be reciprocated in the stab direction (usually up-down direction), and a pair of support plate installed in the double-sided side of the surface of a laminated sheet, and a back surface.
- a large number of needles for piercing the laminated sheet are attached to the needle board at a density of, for example, about 25 to 5000/100 cm 2 .
- Each support plate is provided with a number of through holes for needles. Therefore, with the laminated sheet pressed from both sides by a pair of support plates, the needle board is moved closer to or away from the laminated sheet so that the needle is inserted into and removed from the laminated sheet, and the mat material in which the glass fibers are entangled. It is formed.
- the needling device may include two sets of needle boards.
- Each needle board has a respective support plate.
- Two sets of needle boards are disposed on the front and back surfaces of the laminated sheet, respectively, and the laminated sheet is fixed from both sides with each support plate.
- the needles are arranged on one needle board so that the positions of the needle groups on the other needle board do not overlap during the needling process.
- each support plate is provided with a large number of through-holes so that the needle does not contact the support plate during the needling process from both sides of the laminated sheet in consideration of the needle arrangement of both needle boards. It has been.
- the laminated sheet may be sandwiched from both sides by two sets of support plates, and needling may be performed from both sides of the laminated sheet by two sets of needling boards.
- needling process By performing the needling process by such a method, the processing time is shortened.
- this glass fiber is heat-treated.
- the heat treatment temperature is preferably in the range of 600 ° C. to 800 ° C. (eg, 700 ° C.)
- the heat treatment time is preferably in the range of, for example, 10 minutes to 24 hours (eg, 20 minutes).
- the mat material manufactured in this way is cut into a predetermined shape (for example, a shape having a concave portion and a convex portion on the end face of a rectangular parallelepiped as shown in FIG. 1), and the mat material according to the present invention is manufactured. .
- FIG. 5 is a diagram schematically showing an example of another manufacturing flow of the mat material according to the present invention.
- This second manufacturing method is (A) preparing a glass fiber having the composition as described above (S210); (B) A step of preparing a slurry using this glass fiber (S220); (C) A step of forming a mat material from the slurry by a papermaking method (S230); Have
- the mat material is manufactured by the so-called “papermaking method”.
- the “papermaking method” is a general term for a method of obtaining a mat material by pouring a slurry of inorganic fibers into a papermaking mold and suction-dehydrating the papermaking mold.
- Step S210 Since the step of preparing the glass fiber is substantially the same as the step S110 in the above-described needling method, the description thereof is omitted.
- the glass fiber is preferably relatively short.
- the “average length” of the glass fiber is preferably in the range of 1 mm to 10 mm (eg, 3 mm), for example.
- the diameter of the glass fiber is not particularly limited, but the “average diameter” is preferably in the range of 9 ⁇ m to 13 ⁇ m (for example, 11 ⁇ m).
- Step S220 Next, a slurry is prepared by the following method using the glass fiber obtained in step S210.
- a predetermined amount of glass fiber and an organic binder are put in water and mixed. Further, an inorganic binder and / or a flocculant may be added thereto. Moreover, you may add the expansion material which consists of the above materials.
- the inorganic binder for example, alumina sol and silica sol are used.
- the organic binder latex or the like is used.
- the content of the organic binder is preferably within 20% by weight. If it exceeds 20% by weight, the amount of organic components discharged from the exhaust gas treatment device will increase significantly.
- stirring is preferably performed for about 20 seconds to 120 seconds.
- Step S230 Next, a mat material is manufactured by a papermaking method using the obtained slurry.
- the slurry is introduced into, for example, a molding machine having a fine hole at the bottom.
- a raw material mat having a predetermined shape can be obtained by sucking moisture from the lower side of the molding machine with a suction device or the like and performing a dehydration process.
- the mat material is manufactured by compressing the material mat using a press or the like, and heating and drying at a predetermined temperature.
- the compression treatment is usually preferably performed so that the sheet density after compression is about 0.10 g / cm 3 to 0.40 g / cm 3 .
- the heat drying treatment is preferably performed for about 5 to 60 minutes at a temperature of 90 to 180 ° C., for example, by placing the raw material mat in a heat treatment device such as an oven.
- Example 1 First, a commercially available glass fiber having an average diameter of 11 ⁇ m ⁇ was prepared.
- the nominal composition of this glass fiber is shown in the column of “first glass fiber composition” in Table 1, specifically, 59 to 62 wt% SiO 2 , 12 to 15 wt% by weight ratio.
- the glass fiber was cut so as to have an average fiber length of 3 mm, and further used after being held at 700 ° C. for 20 minutes.
- the obtained slurry was poured into a paper machine, and water was filtered to obtain a raw material mat.
- This raw material mat was kept at 105 ° C. in a compressed state using a press and dried. Thereby, a mat member having a sheet density of about 0.14 g / cm 3 was obtained.
- Example 1 a sample of the mat material
- Example 2 A mat material according to Example 2 was manufactured in the same manner as in Example 1. However, in Example 2, a commercially available glass fiber (average diameter 11 ⁇ m ⁇ ) having the nominal composition shown in the column of “second glass fiber composition” in Table 1 described above was used as the glass fiber. Specifically, the glass fiber composition has a weight ratio of 56 to 62 wt% SiO 2 , 9 to 15 wt% Al 2 O 3 , 17 to 25 wt% CaO, 0 to 5 wt% MgO, 0 to 4 wt%. TiO 2 and 0 to 5 wt% ZnO, and the total of Na 2 O and K 2 O is in the range of 0 to 1 wt%. Further, the glass fiber was used after being cut so that the average fiber length was 3 mm and further maintained at 700 ° C. for 20 minutes.
- Comparative Example 1 A mat material according to Comparative Example 1 was manufactured by the same method as in Example 1. However, in Comparative Example 1, a commercially available E-glass fiber (general E-glass) (average diameter 11 ⁇ m ⁇ ) was used as the glass fiber. Further, the glass fiber was used after being cut so that the average fiber length was 3 mm and further maintained at 700 ° C. for 20 minutes.
- E-glass fiber generally E-glass
- the nominal composition of the E-glass fiber used is that shown in Table 1 above. Specifically, 52-62 wt% SiO 2 , 12-16 wt% Al 2 O 3 , 16-25 wt% CaO, 0-5 wt% MgO, 5-10 wt% B 2 O 3 , 0-1. It contains 5 wt% TiO 2 and the sum of Na 2 O and K 2 O is in the range of 0 to 2 wt%.
- the evaluation test was carried out using the test apparatus shown in FIG.
- the test apparatus 600 shown in FIG. 6 includes a lower base 610 and an upper base 620 disposed on the upper part of the lower base 610.
- the lower base 610 and the upper base 620 have the same shape and dimensions and are arranged so as to be aligned in the vertical direction.
- Each of the lower base 610 and the upper base 620 has a built-in heater (not shown), and each of the lower base 610 and the upper base 620 can be heated to a predetermined temperature.
- the lower base 610 is connected to the support body 630 on the lower surface of the lower base 610.
- the support 630 is non-movable, and therefore the lower base 610 is also fixed.
- the upper base 620 is connected to the support body 640 on the upper surface of the upper base 620.
- the support body 640 can move in the vertical direction, and therefore the upper base 620 is also movable up and down.
- the upper table 620 is a load cell, and the load applied to the lower surface of the upper table 620 can be measured in a state where the upper table 620 and the lower table 610 are in contact with each other.
- one of the above-described samples 650 (56.42 mm ⁇ ) is installed on the upper surface of the lower base 610.
- the upper base 620 is lowered by lowering the support body 640.
- the upper base 620 is lowered until the apparent density GBD of the sample 650 becomes 0.35 g / cm 3 .
- GBD is an index value obtained by (mass of sample 650 / area of sample 650 / thickness of sample 650).
- the temperatures of the lower base 610 and the upper base 620 are 400 ° C. and 700 ° C. (that is, the temperature on the lower surface side of the sample 650 is 400 ° C.).
- the heaters in the lower base 610 and the upper base 620 are heated so that the temperature on the upper surface side becomes 700).
- the temperature increase rate of the lower base 610 was 8.6 ° C./min
- the temperature increase rate of the upper base 620 was 15 ° C./min.
- the load of the sample 650 when the temperature of the lower base 610 and the upper base 620 reaches 400 ° C. and 700 ° C. is measured with a load cell.
- the measurement is performed within at least 5 minutes after the temperature of the lower base 610 and the upper base 620 reaches a predetermined temperature.
- the maximum value of the obtained values is defined as the initial surface pressure (P 0 ) of the sample 650.
- FIG. 7 shows the relationship between the temperature of the upper base 620 obtained in the initial surface pressure evaluation test and the initial surface pressure of the samples 650 of Examples 1 and 2 and Comparative Example 1.
- FIG. 8 is a graph showing the initial surface pressure (P 0 ) values of the samples of Examples 1 and 2 and Comparative Example 1.
- the mat material according to the present invention has a significantly higher initial holding force than the mat material using the conventional E-glass.
- the high-temperature cycle test was performed by the following procedure using the above-described test apparatus shown in FIG.
- one of the above-described samples 650 (56.42 mm ⁇ ) is installed on the upper surface of the lower base 610.
- the upper base 620 is lowered by lowering the support body 640.
- the upper table 620 is lowered until the apparent density GBD of the sump 650 becomes 0.38 g / cm 3 .
- the temperature of the lower base 610 and the upper base 620 is 400 ° C. and 700 ° C. (that is, the temperature of the lower surface side of the sample 650 is 400 ° C., and the temperature of the upper surface side is 600).
- the heaters in 610 and the upper base 620 are heated.
- the temperature increase rate of the lower base 610 was 8.6 ° C./min
- the temperature increase rate of the upper base 620 was 15 ° C./min.
- the upper base 620 is gradually raised, and when the sample 650 is heated to these predetermined temperatures, the sample is compressed so that the apparent density GBD of the sample becomes 0.35 g / cm 3. Gradually open.
- the sample 650 is held for 5 minutes while maintaining the apparent density GBD at 0.35 g / cm 3 .
- the upper base 620 is lowered until the apparent density GBD of the sample 650 becomes 0.38 g / cm 3 .
- the upper base 620 is immediately raised.
- the upper base 620 is raised until the apparent density GBD becomes 0.35 g / cm 3 .
- the load of the sample 650 is measured with a load cell, and this is defined as the surface pressure (P 1 ) (unit: kPa) of the sample after one cycle.
- Holding power decrease rate D (%) ⁇ (P 1 -P 1000 ) / (P 1 ) ⁇ ⁇ 100 (1)
- Formula Table 2 summarizes the surface pressure after one cycle (P 1 ), the surface pressure after 1000 cycles (P 1000 ), and the holding force decrease rate D (%) obtained by the high-temperature cycle test of each sample. Show.
- FIG. 9 is a graph showing the surface pressure (P 1000 ) after 1000 cycles obtained in the samples of Examples 1 and 2 and Comparative Example 1.
- the surface pressure (P 1000 ) after 1000 cycles of the samples according to Example 1 and Example 2 is higher than that of the sample according to Comparative Example 1, and the reduction rate D of the holding force is D. It can be seen that (%) is significantly smaller.
- the surface pressure (P 1000 ) after 1000 cycles is about 70 kPa, and this value is obtained in a general mat material using alumina fibers as inorganic fibers. It was comparable to the value (45 kPa to 70 kPa). From the above test results, it was confirmed that by using the mat material according to the present invention, a significantly higher initial holding force can be obtained as compared with the mat material using the conventional E-glass. Further, it was confirmed that the mat material according to the present invention maintains a relatively good holding force even after being repeatedly subjected to compression / decompression load.
- Example 3 A commercially available glass fiber having an average diameter of 11 ⁇ m ⁇ and a commercially available vermiculite (made by Australia AVI, Grade 1) were prepared.
- the nominal composition of the glass fiber is shown in the column of “first glass fiber composition” in Table 1 described above. This glass fiber is substantially free of B 2 O 3 .
- the glass fiber was cut so that the average fiber length was 3 mm.
- the glass fiber was used after being held at 740 ° C. for 10 minutes and then cooled to 650 ° C. at a rate of 10 ° C./min.
- vermiculite 6.4 g was added to 500 ml of water, and this was used after being pulverized for 1 minute with a mixer (TMD1000E5 model, manufactured by TESCOM).
- the obtained slurry was poured into a paper machine, and water was filtered to obtain a raw material mat.
- This raw material mat was kept at 105 ° C. in a compressed state using a press and dried. Thereby, a mat member having a sheet density of about 0.14 g / cm 3 was obtained.
- Example 3 a sample of the mat material (hereinafter referred to as “sample according to Example 3”).
- the content of vermiculite is 25 wt%.
- Comparative Example 2 A mat material according to Comparative Example 2 was manufactured by the same method as in Example 3. However, in Comparative Example 2, a commercially available E-glass fiber (general E-glass) (average diameter 11 ⁇ m ⁇ ) was used as the glass fiber. Other manufacturing conditions are the same as those in the third embodiment.
- FIG. 10 collectively shows the measurement results of the initial surface pressure obtained in Example 3 and Comparative Example 2.
- the initial surface pressure of the mat material was further improved by adding an expansion material to the mat material according to the present invention, particularly in the range of 500 ° C. to 800 ° C.
- the mat material of the present invention can be applied to a holding sealing material of an exhaust gas treatment device used for a vehicle or the like.
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Abstract
Description
前記ガラス繊維は、重量比で、52~62wt%のSiO2、9~17wt%のAl2O3、17~27wt%のCaO、0~9wt%のMgO、0~4wt%のTiO2、および0~5wt%のZnOを含み、B2O3を実質的に含まず、Na2OとK2Oの総和が0~2wt%の範囲にあり、
当該マット材を上部板と下部板の間に設置し、GBD=0.35g/cm3において、前記上部板を昇温速度15℃/分で昇温すると同時に、前記下部板を昇温速度8.6℃/分で昇温し、前記上部板および前記下部板の温度がそれぞれ、700℃および400℃に到達時点で測定したときの面圧が100kPa以上であるマット材が提供される。
排気ガスの流通する2つの開口面を有する排気ガス処理体と、
前記排気ガス処理体の開口面を除く外周面の少なくとも一部に巻き付けて使用される保持シール材と、
該保持シール材が巻き回された前記排気ガス処理体を収容する筒状部材と、
で構成される排気ガス処理装置であって、
前記保持シール材は、前述の特徴を有するマット材で構成されることを特徴とする排気ガス処理装置が提供される。
前記ガラス繊維は、重量比で、52~62wt%のSiO2、9~17wt%のAl2O3、17~27wt%のCaO、0~9wt%のMgO、0~4wt%のTiO2、および0~5wt%のZnOを含み、B2O3を実質的に含まず、Na2OとK2Oの総和が0~2wt%の範囲にあり、
当該マット材を上台と下台の間に設置し、GBD=0.35g/cm3において、前記上台を昇温速度15℃/分で昇温すると同時に、前記下台を昇温速度8.6℃/分で昇温し、前記上台および前記下台の温度がそれぞれ、700℃および400℃に到達時点で測定したときの面圧が100kPa以上である、マット材が提供される。
次に、図4を参照して、本発明によるマット材の製造方法の一例について説明する。
(A)前述のような組成を有するガラス繊維を準備するステップ(S110)と、
(B)このガラス繊維を用いて、積層シートを調製するステップ(S120)と、
(C)前記積層シートから、ニードリング法によりマット材を形成するステップ(S130)と、
を有する。
ステップS110では、前述のような組成を有するガラス繊維が準備される。ガラス繊維の長さは、特に限られない。ただし、後のニードリング処理の際に、繊維同士が容易に絡み合うよう、ガラス繊維は、比較的長いものが好ましい。ガラス繊維の「平均長さ」は、例えば、5mm~100mmの範囲(例えば50mm)が好ましい。なお、「平均長さ」は、ランダムに採取した100本の繊維の全長を平均した値である。
次に、前述のガラス繊維を用いて開繊処理が行われ、これにより、綿状の積層シートが形成される。開繊処理は、例えば、カーディング法により、実施されても良い。この方法では、ウェブと呼ばれる不織布が形成され、これが多数積層されることにより、積層シートが形成される。
次に、前記積層シートから、「ニードリング法」により、マット材が形成される。
次に、図5を参照して、本発明によるマット材の別の製造方法(第2の方法)の一例について説明する。
(A)前述のような組成を有するガラス繊維を準備するステップ(S210)と、
(B)このガラス繊維を用いて、スラリーを調製するステップ(S220)と、
(C)前記スラリーから、抄造法によりマット材を形成するステップ(S230)と、
を有する。
ガラス繊維を準備するステップは、前述のニードリング法におけるステップS110の工程と実質的に等しいため、説明は省略する。
次に、ステップS210で得られたガラス繊維を用いて、以下の方法により、スラリーが調製される。
次に、得られたスラリーを用いて、抄造法により、マット材が製作される。
まず、平均直径11μmφの市販のガラス繊維を準備した。このガラス繊維の公称組成は、表1において、「第1のガラス繊維組成」の欄に示したものであり、具体的には、重量比で、59~62wt%のSiO2、12~15wt%のAl2O3、20~24wt%のCaO、1~4wt%のMgO、0~0.9wt%のTiO2を含み、ZnOを実質的に含まず、Na2OとK2Oの総和が0~1wt%の範囲にあるものである。なお、このガラス繊維には、実質的にB2O3は、含まれていない。
実施例1と同様の方法により、実施例2に係るマット材を製作した。ただし、実施例2では、ガラス繊維として、前述の表1において、「第2のガラス繊維組成」の欄に示した公称組成を有する市販のガラス繊維(平均直径11μmφ)を使用した。具体的には、ガラス繊維組成は、重量比で、56~62wt%のSiO2、9~15wt%のAl2O3、17~25wt%のCaO、0~5wt%のMgO、0~4wt%のTiO2、および0~5wt%のZnOを含み、Na2OとK2Oの総和が0~1wt%の範囲にある。また、ガラス繊維は、平均繊維長が3mmとなるように切断し、さらに、700℃で20分間保持してから使用した。
実施例1と同様の方法により、比較例1に係るマット材を製作した。ただし、比較例1では、ガラス繊維として、市販のE-ガラス繊維(一般的なE-ガラス)(平均直径11μmφ)を使用した。また、ガラス繊維は、平均繊維長が3mmとなるように切断し、さらに、700℃で20分間保持してから使用した。
重量比で、52~62wt%のSiO2、12~16wt%のAl2O3、16~25wt%のCaO、0~5wt%のMgO、5~10wt%のB2O3、0~1.5wt%のTiO2を含み、Na2OとK2Oの総和が0~2wt%の範囲にあるものである。
マット材の高温での保持力を評価するため、各サンプルを用いて、初期面圧評価試験を行った。
次に、マット材の圧縮および復元の繰り返し負荷後の保持力の変化を把握するため、実施例1、実施例2および比較例1の各サンプルを用いて、高温サイクル試験を行った。
保持力の低下率D(%)
={(P1-P1000)/(P1)}×100 (1)式
表2には、各サンプルの高温サイクル試験によって得られた、1サイクル後の面圧(P1)、1000サイクル後の面圧(P1000)、および保持力の低下率D(%)をまとめて示す。
以上の試験結果から、本発明によるマット材を使用することにより、従来のE-ガラスを使用したマット材に比べて、有意に高い初期保持力が得られることが確認された。また、本発明によるマット材は、圧縮/復元の繰り返し負荷を受けた後にも、比較的良好な保持力を維持することが確認された。
平均直径11μmφの市販のガラス繊維、および市販のバーミキュライト(オーストラリアAVI社製、Grade1)を準備した。
25wt%である。
実施例3と同様の方法により、比較例2に係るマット材を製作した。ただし、比較例2では、ガラス繊維として、市販のE-ガラス繊維(一般的なE-ガラス)(平均直径11μmφ)を使用した。その他の製作条件は、実施例3と同様である。
実施例3および比較例2に係るマット材の高温での保持力を評価するため、両サンプルを用いて、高温面圧評価試験を行った。この試験方法は、前述の(初期面圧評価試験)の欄に示した方法と同様である。ただし、ここでは、初期の見かけの密度GBDを0.40g/cm3とした。また、上台620は、室温から800℃まで昇温させ、下台610は、室温から456℃まで昇温させた。上台620の昇温速度は、15℃/分とし、下台610の昇温速度は、8.6℃/分とした。
12 金属ケーシング
20 排気ガス処理体
24 保持シール材
30 マット材
50 嵌合凸部
60 嵌合凹部
600 試験装置
610 下台
620 上台
630、640 支持体
650 サンプル。
Claims (11)
- ガラス繊維を含むマット材であって、
前記ガラス繊維は、重量比で、52~62wt%のSiO2、9~17wt%のAl2O3、17~27wt%のCaO、0~9wt%のMgO、0~4wt%のTiO2、および0~5wt%のZnOを含み、B2O3を実質的に含まず、Na2OとK2Oの総和が0~2wt%の範囲にあり、
当該マット材を上部板と下部板の間に設置し、GBD=0.35g/cm3において、前記上部板を昇温速度15℃/分で昇温すると同時に、前記下部板を昇温速度8.6℃/分で昇温し、前記上部板および前記下部板の温度がそれぞれ、700℃および400℃に到達時点で測定したときの面圧が100kPa以上である、マット材。 - 前記ガラス繊維は、実質的にフッ素を含まないことを特徴とする請求項1に記載のマット材。
- 前記ガラス繊維は、重量比で、59~62wt%のSiO2、12~15wt%のAl2O3、20~24wt%のCaO、1~4wt%のMgO、0~0.9wt%のTiO2を含み、ZnOを実質的に含まず、Na2OとK2Oの総和が0~1wt%の範囲にあることを特徴とする請求項1に記載のマット材。
- 前記ガラス繊維は、重量比で、56~62wt%のSiO2、9~15wt%のAl2O3、17~25wt%のCaO、0~5wt%のMgO、0~4wt%のTiO2、および0~5wt%のZnOを含み、Na2OとK2Oの総和が0~1wt%の範囲にあることを特徴とする請求項1に記載のマット材。
- 前記ガラス繊維の平均直径は、9μm~13μmの範囲にあることを特徴とする請求項1乃至4のいずれか一つに記載のマット材。
- 前記ガラス繊維の平均長さは、1mm~10mmの範囲、または5mm~100mmの範囲にあることを特徴とする請求項1乃至5のいずれか一つに記載のマット材。
- さらに、有機バインダを有することを特徴とする請求項1乃至6のいずれか一つに記載のマット材。
- さらに、膨張材を有することを特徴とする請求項1乃至7のいずれか一つに記載のマット材。
- 前記膨張材は、バーミキュライト、ベントナイト、金雲母、パーライト、膨脹性黒鉛、および膨脹性フッ化雲母からなる群から選定された少なくとも一つの材料を含むことを特徴とする請求項8に記載のマット材。
- 排気ガスの流通する2つの開口面を有する排気ガス処理体と、
前記排気ガス処理体の開口面を除く外周面の少なくとも一部に巻き付けて使用される保持シール材と、
該保持シール材が巻き回された前記排気ガス処理体を収容する筒状部材と、
で構成される排気ガス処理装置であって、
前記保持シール材は、請求項1乃至9のいずれか一つに記載のマット材で構成されることを特徴とする排気ガス処理装置。 - 前記排気ガス処理体は、触媒担持体または排気ガスフィルタであることを特徴とする請求項10に記載の排気ガス処理装置。
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FR2910462B1 (fr) * | 2006-12-22 | 2010-04-23 | Saint Gobain Vetrotex | Fils de verre aptes a renforcer des matieres organiques et/ou inorganiques |
FR2916438B1 (fr) * | 2007-05-23 | 2010-08-20 | Saint Gobain Vetrotex | Fils de verre aptes a renforcer des matieres organiques et/ou inorganiques |
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2010
- 2010-03-25 JP JP2010070705A patent/JP2011026755A/ja active Pending
- 2010-06-30 EP EP10794173.4A patent/EP2450542A4/en not_active Withdrawn
- 2010-06-30 IN IN537DEN2012 patent/IN2012DN00537A/en unknown
- 2010-06-30 CN CN2010800290292A patent/CN102472141A/zh active Pending
- 2010-06-30 WO PCT/JP2010/061118 patent/WO2011002005A1/ja active Application Filing
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2011
- 2011-12-29 US US13/339,416 patent/US20120149271A1/en not_active Abandoned
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JP2006516043A (ja) | 2002-07-31 | 2006-06-15 | スリーエム イノベイティブ プロパティズ カンパニー | 排気ガス処理用の汚染制御装置において汚染制御要素を実装するためのマット |
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US20140227143A1 (en) * | 2011-10-21 | 2014-08-14 | Ibiden Co., Ltd. | Mat material and exhaust gas purifying apparatus |
Also Published As
Publication number | Publication date |
---|---|
IN2012DN00537A (ja) | 2015-06-05 |
CN102472141A (zh) | 2012-05-23 |
EP2450542A1 (en) | 2012-05-09 |
EP2450542A4 (en) | 2016-05-25 |
US20120149271A1 (en) | 2012-06-14 |
JP2011026755A (ja) | 2011-02-10 |
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