Filtration article containing a filtration material containing fibrous layers having different lengths
US9737855B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2014 |
| Grant date | Aug 22, 2017 |
| Priority date | — |
| Expiry date | Oct 25, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/36
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filtration material having a second fibrous layer (downstream drainage layer) with a length that is shorter than the length of the first fibrous material (upstream drainage layer) is provided. At least the first fibrous material is meltable. In forming the filtration material, the second fibrous layer may be cut to a predetermined length while the porous membrane and the first fibrous layer maintain their length. The length of the second fibrous layer may be substantially the same as the length of the outer cage. The filtration material is disposed within the outer cage such that the first fibrous layer and the porous membrane protrude from the cage member. When positioning an end cap onto the filtration material, heat is applied and the first fibrous layer melts and bonds to the end cap at a melt interface. The filtration material is free from thermoplastic strips and imbibed thermoplastic material(s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.