Filtration fabric produced by wet laid process
US4973382A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1988 |
| Grant date | Nov 27, 1990 |
| Priority date | — |
| Expiry date | Jul 26, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2239/1225
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A nonwoven filtration fabric is composed of a plurality of fiber components of dissimilar denier and length which are evenly intermingled and bonded together in a sheet, including a first fiber component of staple polyester fibers of high denier and a textile length, a second fiber component of staple polyester fibers of low denier and shorter length than the first fiber component, a third fiber component of wood pulp fibers of shorter length than the first fiber components, and a suitable binder. The fabric is formed by a wet laid process in which the dissimilar fiber components are evenly mixed and distributed in a homogeneous slurry. A filter media made of the fabric has a high tensile strength, even pore size and distribution, low pressure drop, and is suitable for macrofiltration applications, such as filtering milk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.