Methods of decontaminating secondary fiber
US4643800A · kind A · utility
26Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1985 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Jun 7, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/64
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The method of substantially removing and dispersing resinous or waxy contaminants from contaminant-containing secondary fiber during repulping, is disclosed. The method includes combining the contaminant-containing secondary fiber in an aqueous repulping medium with a substituted oxyethylene glycol nonionic surfactant, and a water soluble, low molecular weight polyelectrolyte dispersant, at an elevated temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.