Manufacturing method of plugged honeycomb structure
US-2018222083-A1 · Aug 9, 2018 · US
Honeycomb filter
US10994236B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10994236-B2 |
| Application number | US-202016815619-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 11, 2020 |
| Priority date | Mar 29, 2019 |
| Publication date | May 4, 2021 |
| Grant date | May 4, 2021 |
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- Title
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Abstract
Official abstract text for this publication.
A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls placed, 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 of the cells or at the ends on the outflow end face side of the cells, wherein the plugging portions include plugging portions that have voids therein, and in the plugging portions having the voids, porosity including the voids as pores ranges from 68% to 83%.
First claim
Opening claim text (preview).
What is claimed is: 1. A honeycomb filter comprising: a pillar-shaped honeycomb structure having porous partition walls placed, 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 of the cells or at the ends on the outflow end face side of the cells, wherein the plugging portions include plugging portions that have voids therein, in the plugging portions having the voids, porosity including the voids as pores ranges from 68% to 83%, the plugging portions having the voids exist only in a circumferential region in a section that is orthogonal to an extending direction of the cells of the honeycomb structure, and the circumferential region is a region that expands to an eighth cell counted toward a center of the section from a cell positioned at the outermost circumference of the honeycomb structure in the section of the honeycomb structure. 2. The honeycomb filter according to claim 1 , wherein each of the plugging portions having the voids has at least one void, an inner diameter of which in a radial direction of an end face of the honeycomb filter ranges from 0.3 mm to 1.1 mm, and the inner diameter of which in the extending direction of the cells ranges from 1.0 mm to 4.0 mm. 3. The honeycomb filter according to claim 1 , wherein the porosity of the partition walls ranges from 50% to 70%.
Assignees
Inventors
Classifications
- B01D46/244Primary
of the plugs · CPC title
of the plugs · CPC title
- B01D46/2429Primary
of the honeycomb walls or cells · CPC title
Monolithic structures · CPC title
Thickness, height, width, length or diameter · CPC title
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- What does patent US10994236B2 cover?
- A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls placed, 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 of the cells or at the ends on the outflow end face side of the cells, wherein th…
- Who is the assignee on this patent?
- Ngk Insulators Ltd
- What technology area does this patent fall under?
- Primary CPC classification B01D46/244. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue May 04 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).