# US 2017/0284245 A1 · Manufacturing method of plugged honeycomb structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0284245 A1 - Document ID: US20170284245A1 - Status: Published application - Kind: A1 - Application number: 15/460,424 - Filed: 2017-03-16 - Published: 2017-10-05 - Earliest claimed: 2016-03-31 - Assignees: NGK Insulators, Ltd. - Applicants: Ngk Insulators, Ltd. - Inventors: Michio SUZUKI; Kojiro HAYASHI; Yuji WATANABE - Web page: https://patentgrep.com/patent/US20170284245A1 ## CPC - F01N 3/0222: {the structure being monolithic, e.g. honeycombs} - B01D 46/2418: {Honeycomb filters (used for filtering exhaust gases of an internal combustion engine F01N3/022; ceramic honeycomb structures per se C04B38/0006)} - B28B 11/006: {Making hollow articles or partly closed articles} - C04B 38/0012: {characterised by the material used for sealing or plugging (some of) the channels of the honeycombs} - C04B 2111/00793: {as filters or diaphragms} - F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16) - 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) - B28B: SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER (foundry moulding B22C; working stone or stone-like material B28D; shaping of substances in a plastic state, in general B29C; making layered products not composed wholly of these substances B32B) - 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 ## Abstract The manufacturing method of the plugged honeycomb structure includes a honeycomb structure forming step of forming a pillar-shaped honeycomb structure, and a plugging step of forming plugging portions in end portions of the cells of the honeycomb structure formed in the honeycomb structure forming step, and in the plugging step, there is performed a press pouring operation of pressing one end face of the honeycomb structure into a plugging slurry stored in a bottomed tubular container to pour, under pressure, the plugging slurry into the cells of the honeycomb structure, and as the plugging slurry of the plugging step, there is used a slurry in which a yield point viscosity of a viscous fluidity is 600 Pa·s or more, a recovery viscosity is 300 Pa·s or more, and a high shearing viscosity is 200 Pa·s or less. ## Claims ### Claim 1 A manufacturing method of a plugged honeycomb structure, comprising: a honeycomb structure forming step of forming a pillar-shaped honeycomb structure having partition walls defining a plurality of cells which become through channels for fluid and extend from a first end face to a second end face; and a plugging step of forming plugging portions in end portions of the cells of the honeycomb structure formed in the honeycomb structure forming step, wherein in the plugging step, there is performed a press pouring operation of pressing one end face of the honeycomb structure into a plugging slurry stored in a bottomed tubular container to pour, under pressure, the plugging slurry into the cells of the honeycomb structure, and as the plugging slurry of the plugging step, there is used a slurry in which a yield point viscosity of a viscous fluidity is 600 Pa·s or more, a recovery viscosity is 300 Pa·s or more, and a high shearing viscosity is 200 Pa·s or less. ### Claim 2 (depends on 1) The manufacturing method of the plugged honeycomb structure according to claim 1, wherein the plugging slurry contains a thickener. ### Claim 3 (depends on 2) The manufacturing method of the plugged honeycomb structure according to claim 2, wherein the thickener is at least one selected from the group consisting of synthetic smectite, silica fume, a crystalline nanocellulose fiber, a water-soluble polymer, water-soluble polymer saccharide, and inorganic particles. ### Claim 4 (depends on 2) The manufacturing method of the plugged honeycomb structure according to claim 2, wherein the plugging slurry contains water-soluble polymer saccharide or synthetic smectite as the thickener, and further contains a lubricant. ### Claim 5 (depends on 4) The manufacturing method of the plugged honeycomb structure according to claim 4, wherein synthetic smectite includes synthetic saponite.