Honeycomb structure and manufacturing method of honeycomb structure

Patent metadata

Field	Value
Publication number	US-9873071-B2
Application number	US-201514618253-A
Country	US
Kind code	B2
Filing date	Feb 10, 2015
Priority date	Mar 22, 2012
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

The honeycomb structure includes a honeycomb structure part having porous partition walls, and porous plugged portions, and when there is drawn a straight line as an inner boundary line which is positioned at a distance of 30% of a distance between an outer end surface and an inner end surface, from the inner end surface, and there is drawn a straight line as an outer boundary line which is positioned at a distance of 70% of the distance between the outer end surface and the inner end surface, from the inner end surface, each of the plugged portions has an outer region, and an inner region which is the region between the inner end surface and the inner boundary line and whose porosity is larger than a porosity of the outer region.

First claim

What is claimed is:

1. A manufacturing method of a honeycomb structure comprising:
a formed honeycomb body preparing step of extruding, into a honeycomb shape, a kneaded material obtained by kneading a forming raw material containing a ceramic raw material, to prepare a formed honeycomb body having partition walls with which there are formed a plurality of cells extending through the formed honeycomb body from one end surface to the other end surface;
a plugged formed honeycomb body preparing step of continuously rubbing, into open frontal areas of the cells of the prepared formed honeycomb body, a plugging material including the forming raw material containing the ceramic raw material and 1.5 to 35 mass % of resin balloons, to fill the plugging material into the open frontal areas, thereby preparing the plugged formed honeycomb body; and
a honeycomb structure preparing step of firing the prepared plugged formed honeycomb body, to prepare the honeycomb structure in which porous plugged portions are arranged in one end portion of each of the predetermined cells and the other end portion of each of the remaining cells.

2. The manufacturing method of the honeycomb structure according to claim 1 ,
wherein a viscosity of the plugging material is from 30 to 2000 dPa·s.

Assignees

• Ngk Insulators Ltd

Inventors

• Tsuchiya Yusuke
• Suenobu Hiroyuki

Classifications

• B01D46/244

  of the plugs · CPC title

• B01D46/0001

  Making filtering elements · CPC title

• B01D2279/30

  for treatment of exhaust gases from IC Engines · CPC title

• B01D46/0005 Primary

  Mounting of filtering elements within casings, housings or frames (B01D46/2422 takes precedence) · CPC title

• B01D46/24491 Primary

  Porosity · CPC title