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公开(公告)号：US20230311111A1
公开(公告)日：2023-10-05
申请号：US18173911
申请日：2023-02-24
Applicant: NGK Insulators, Ltd.
Inventor： Fumihiko YOSHIOKA , Yudai KURIMOTO
CPC classification number: B01J35/04 , F01N3/2803 , B01D53/94 , B01D46/2482 , B01D46/2484 , B01D46/24491 , B01D46/2474 , B01D46/249 , F01N2330/32 , F01N2330/48 , B01D2255/9155 , B01D2279/30 , B01D2259/4566
Abstract: A honeycomb filter includes: a honeycomb structure having porous partition walls disposed so as to surround cells, and plugging portions disposed at any one of ends on the inflow end face and the ends on the outflow end face, of cells. In a cross section perpendicular to an extending direction of the cells, a thickness T1 of the partition walls in a central portion including a center of gravity O of the cross section is 0.17 to 0.32 mm, a thickness T2 of the partition walls in an outer peripheral portion is 70 to 90% of the thickness T1, and the outer peripheral portion extends from an outer peripheral edge of the cross section of honeycomb structure by 6 to 12% of a radius r which is from the center of gravity O of the cross section to the outer peripheral edge.
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公开(公告)号：US20230311048A1
公开(公告)日：2023-10-05
申请号：US18177292
申请日：2023-03-02
Applicant: NGK Insulators, Ltd.
Inventor： Yudai KURIMOTO , Fumihiko YOSHIOKA
CPC classification number: B01D46/2474 , B01D46/2482 , B01D46/24491 , B01D46/2429 , B01D46/24492 , B01D46/2484 , B01D39/2068 , B01D46/249 , B01D46/247 , B01D2279/30
Abstract: A honeycomb filter comprising a pillar-shaped honeycomb structure body having a porous partition wall and a plugging portion, wherein a thickness of the partition wall is 0.217 mm or less, a porosity of the partition wall is 57 to 63%, an average pore diameter of the partition wall is 6 to 14 μm, a number per unit area of pores which exist at a surface of the partition wall and which have equivalent circle opening diameters exceeding 3 μm is 800 to 1500 /mm2, an average equivalent circle opening diameter of pores which exist at a surface of the partition wall and which have equivalent circle opening diameters exceeding 3 μm is 6.7 to 12.5 μm, and in a pore diameter distribution of the partition wall, D10 is 3.0 to 7.0 μm, D90 is 13.0 to 27.0 μm, and (Log (D90)-Log (D10))/Log (D50) is 0.75 or less.
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公开(公告)号：US20210270172A1
公开(公告)日：2021-09-02
申请号：US17151262
申请日：2021-01-18
Applicant: NGK Insulators, Ltd.
Inventor： Fumihiko YOSHIOKA , Yuji SASAKI , Kimiko KISHINE , Sachiko ISHIDA , Kyohei KATO
Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure body having a porous partition wall disposed to surround a plurality of cells and a plugging portion, wherein the partition wall is composed of a material containing cordierite as a main component thereof, porosity of the partition wall measured by a mercury press-in method is 60 to 68%, an average pore diameter of the partition wall measured by a mercury press-in method is 19 to 26 μm, and in a pore diameter distribution indicating a cumulative pore volume of the partition wall measured by a mercury press-in method, with a pore diameter (μm) on an abscissa axis and a log differential pore volume (cm3/g) on an ordinate axis, a first peak including a maximum value of the log differential pore volume has a pore diameter value of 18 μm or less, the pore diameter value corresponding to a ⅓ value width of the maximum value.
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公开(公告)号：US20210270163A1
公开(公告)日：2021-09-02
申请号：US17151282
申请日：2021-01-18
Applicant: NGK Insulators, Ltd.
Inventor： Fumihiko YOSHIOKA , Nozomu HIRAI , Kyohei KATO
Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure body having a porous partition wall disposed to surround a plurality of cells and a plugging portion, wherein the partition wall is composed of a material containing cordierite as a main component thereof, porosity of the partition wall measured by a mercury press-in method is 55 to 65%, an average pore diameter of the partition wall measured by a mercury press-in method is 5 to 10 μm, and in a pore diameter distribution indicating a cumulative pore volume of the partition wall measured by a mercury press-in method, with a pore diameter (μm) on an abscissa axis and a log differential pore volume (cm3/g) on an ordinate axis, a first peak including a maximum value of the log differential pore volume has a pore diameter value of 8 μm or less, the pore diameter value corresponding to a ⅓ value width of the maximum value.
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公开(公告)号：US20230347275A1
公开(公告)日：2023-11-02
申请号：US18177376
申请日：2023-03-02
Applicant: NGK Insulators, Ltd.
Inventor： Fumihiko YOSHIOKA , Yuji SASAKI , Yasuyuki FURUTA , Ritsuko TERANISHI , Ayaka SAKAI , Tatsuya OHASHI
IPC: B01D46/24
CPC classification number: B01D46/24492 , B01D46/24491 , B01D46/2459 , B01D46/247 , B01D46/2482 , B01D46/249 , B01D46/2494
Abstract: A honeycomb filter comprising a pillar-shaped honeycomb structure body having a porous partition wall and a plugging portion, wherein, in a pore diameter distribution of the partition wall, in the case where the pore diameter (µm) whose cumulative pore volume is 10% of the total pore volume is denoted by D10, the pore diameter (µm) whose cumulative pore volume is 50% of the total pore volume is denoted by D50, and the pore diameter (µm) whose cumulative pore volume is 90% of the total pore volume is denoted by D90, all of the following equations (1) to (6) are satisfied.
8
.4
μ
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Patent Agency Ranking
公开(公告)号：US20220305478A1
公开(公告)日：2022-09-29
申请号：US17644373
申请日：2021-12-15
Applicant: NGK Insulators, Ltd.
Inventor： Sachiko ISHIDA , Fumihiko YOSHIOKA
Abstract: A honeycomb filter includes a honeycomb structure having a porous partition wall disposed to surround a plurality of cells; and a plugging portion provided at one end of the cell, wherein the honeycomb structure has an inflow side region including a range of up to at least 30% with respect to the total length of the honeycomb structure with the inflow end face as the starting point and an outflow side region including a range of up to at least 20% with respect to the total length of the honeycomb structure with the outflow end face as the starting point, in the extending direction of the cell of the honeycomb structure, an average pore diameter of the partition wall in the inflow side region is 9 to 14 μm and an average pore diameter of the partition wall in the outflow side region is 15 to 20 μm.
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公开(公告)号：US20200306739A1
公开(公告)日：2020-10-01
申请号：US16815549
申请日：2020-03-11
Applicant: NGK Insulators, Ltd.
Inventor： Fumihiko YOSHIOKA
Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls provided, surrounding a plurality of cells which serve as fluid through channels extending from an inflow end face to an outflow end face, and porous plugging portions provided either at the ends on the inflow end face or the outflow end face of the cells, wherein the plugging portions are composed of a porous material, the honeycomb structure has a central region and a circumferential region and a ratio of an area of the circumferential region with respect to that of the central region ranges from 0.1 to 0.5, and a plugging length L1 in the cell extending direction of a central plugging portion in the central region is smaller than a plugging length L2 of a circumferential plugging portion in the circumferential region, L1 ranges from 3 to 6 mm, and L2 from 7 to 9 mm.
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公开(公告)号：US20200306681A1
公开(公告)日：2020-10-01
申请号：US16815523
申请日：2020-03-11
Applicant: NGK Insulators, Ltd.
Inventor： Fumihiko YOSHIOKA
Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls provided, surrounding a plurality of cells which serve as fluid through channels extending from an inflow end face to an outflow end face, and porous plugging portions provided either at the ends on the inflow end face side or the outflow end face side of the cells, wherein the plugging portions are composed of a porous material, the honeycomb structure has a central region and a circumferential region, and a ratio of an area of the circumferential region with respect to that of the central region ranges from 0.1 to 0.5, porosity of a central plugging portion in the central region, is higher than that of a circumferential plugging portion in the circumferential region, and the porosity of the central plugging portion ranges from 76% to 85%, and that of the circumferential plugging portion from 60% to 75%.
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公开(公告)号：US20230311047A1
公开(公告)日：2023-10-05
申请号：US18177337
申请日：2023-03-02
Applicant: NGK Insulators, Ltd.
Inventor： Yudai KURIMOTO , Yasuyuki FURUTA , Fumihiko YOSHIOKA , Tatsuya OHASHI , Ayaka SAKAI , Ritsuko TERANISHI
IPC: B01D46/24
CPC classification number: B01D46/2429 , B01D46/24491 , B01D46/24492 , B01D46/249 , B01D2279/30
Abstract: A honeycomb filter comprising a pillar-shaped honeycomb structure body having a porous partition wall disposed to surround a plurality of cells which serve as fluid through channels extending from a first end face to a second end face and a plugging portion provided at an open end on the first end face side or the second end face side of each of the cells, wherein the partition wall has an average number of branches of pores existing at the outermost surface of the partition wall of greater than 7.5 and less than 9.0.
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公开(公告)号：US20220305422A1
公开(公告)日：2022-09-29
申请号：US17645466
申请日：2021-12-22
Applicant: NGK Insulators, Ltd.
Inventor： Fumihiko YOSHIOKA , Sachiko ISHIDA
Abstract: A honeycomb filter includes a honeycomb structure having a porous partition wall disposed to surround a plurality of cells; and a plugging portion provided at one end of the cell, wherein the honeycomb structure has an inflow side region including a range of up to at least 30% with respect to the total length of the honeycomb structure with the inflow end face as the starting point and an outflow side region including a range of up to at least 20% with respect to the total length of the honeycomb structure with the outflow end face as the starting point, in the extending direction of the cell of the honeycomb structure, an average pore diameter of the partition wall in the inflow side region is 15 to 20 μm and an average pore diameter of the partition wall in the outflow side region is 9 to 14 μm.
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