Process for producing fibrillated fibers
US7566014B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2007 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | Nov 9, 2027 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21D1/20
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for making fibrillated fibers includes preparing a fluid suspension of fibers, low shear refining the fibers at a first shear rate to create fibrillated fibers having a reduced CSF, and subsequently higher shear refining the fibers at a second shear rate, higher than the first shear rate, to increase the degree of fibrillation of the fibers. The refining at the first shear rate may be with a rotor at a first maximum shear rate and the refining at the second shear rate may be with a rotor at a second maximum shear rate, higher than the first maximum shear rate. The process may further include pre-treating the fibers by high shear refining with impact to stress the fibers prior to low shear refining.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.