Honeycomb filter for exhaust gas decontamination, adhesive, coating material and process for producing honeycomb filter for exhaust gas decontamination
US8029737B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2003 |
| Grant date | Oct 4, 2011 |
| Priority date | — |
| Expiry date | Mar 14, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24149
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A honeycomb filter for purifying exhaust gases includes columnar porous ceramic members and an adhesive layer combing the ceramic members with one another. Each porous ceramic member has a partition wall and through holes. The through holes are extending in parallel in length direction of the ceramic members. The partition wall is separating the through holes and filters particulates in exhaust gas. The through holes include ones sealed at inlet side of the ceramic members and ones sealed at outlet side of the ceramic members such that the exhaust gas enters from the inlet side, passes through the partition wall and flows out from the outlet side. The adhesive layer has thermal expansion coefficient αL. The ceramic members have thermal expansion coefficient αF. The thermal expansion coefficient αL of the adhesive layer and the thermal expansion coefficient αF of the ceramic members satisfy relationship, 0.01<|αL−αF|/αF<1.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.