# US 11,027,269 B2 · Plugged honeycomb structure

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- Number: US 11,027,269 B2
- Document ID: US11027269B2
- Status: Granted
- Kind: B2
- Application number: 15/907,618
- Filed: 2018-02-28
- Published: 2018-09-27
- Granted: 2021-06-08
- Earliest claimed: 2017-03-21
- Assignees: NGK Insulators, Ltd.
- Applicants: Ngk Insulators, Ltd.
- Inventors: Kazuya Yuki
- Web page: https://patentgrep.com/patent/US11027269B2

## CPC

- B01D 46/2466: {of the adhesive layers, i.e. joints between segments}
- B01D 46/2425: {characterized by parameters related to the physical properties of the honeycomb structure material}
- B01D 46/2448: {of the adhesive layers, i.e. joints between segments}
- B01D 46/2478: {Structures comprising honeycomb segments}
- B01D 46/82: with catalysts
- B01J 37/0215: {Coating}
- C04B 38/0012: {characterised by the material used for sealing or plugging (some of) the channels of the honeycombs}
- C04B 41/009: {characterised by the material treated}
- C04B 41/5089: {Silica sols, alkyl, ammonium or alkali metal silicate cements}
- C04B 41/85: with inorganic materials
- B01D 46/2498: {The honeycomb filter being defined by mathematical relationships}
- B01D 53/9418: {for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas}
- B01D 53/944: {Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts (three-way-catalysts [TWC] B01D53/9445)}
- B01D 53/9454: {characterised by a specific device}
- B01D 2255/9155: Wall flow filters
- B01D 2279/30: for treatment of exhaust gases from IC Engines
- B01J 35/56: Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional [3D] monoliths
- Y02T 10/12: Improving ICE efficiencies
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A plugged honeycomb structure, including: a plurality of honeycomb segments, a bonding layer and a circumferential wall disposed to surround circumference of a honeycomb segment bonded body where the plurality of honeycomb segments are bonded, wherein in the bonding layer, the bonding layer at a part that bonds the honeycomb segments disposed in contact with the circumferential wall is a circumferential bonding layer, and the bonding layer at a part that bonds the honeycomb segment including a center of gravity in a cross section orthogonal to the extending direction of cells of the honeycomb segment bonded body or at a position closest to the center of gravity and another honeycomb segment adjacent to the honeycomb segment is a center bonding layer, and a bonding strength A1 of the circumferential bonding layer is larger than a bonding strength A2 of the center bonding layer.

## Claims

### Claim 1

A plugged honeycomb structure, comprising: a plurality of prismatic columnar shaped honeycomb segments;
a bonding layer that mutually bonds adjacent lateral faces of the plurality of honeycomb segments; and
a circumferential wall disposed to surround a circumference of a honeycomb segment bonded body where the plurality of honeycomb segments are bonded,
wherein each of the honeycomb segments includes porous partition walls disposed so as to surround a plurality of cells, the plurality of cells extending from an inflow end face to an outflow end face,
the plurality of cells of each honeycomb segment of the plurality of honeycomb segments are plugged at ends of any one of the inflow end face and the outflow end face with plugging portions,
in the bonding layer, the bonding layer at a part that bonds the honeycomb segments disposed in contact with the circumferential wall is a circumferential bonding layer, and the bonding layer at a part that bonds the honeycomb segments including a center of gravity in a cross section orthogonal to the extending direction of the plurality of cells of the honeycomb segment bonded body or at a position closest to the center of gravity and another adjacent honeycomb segment is a center bonding layer, and a bonding strength A1 of the circumferential bonding layer is larger than a bonding strength A2 of the center bonding layer, and
wherein the bonding strength A1 of the circumferential bonding layer is 1.25 to 1.43 times the bonding strength A2 of the center bonding layer.

### Claim 2 (depends on 1)

The plugged honeycomb structure according to claim 1, wherein the bonding strength A1 of the circumferential bonding layer is 850 to 1200 kPa.