Process for preparing a sheet material with improved on-machine retention
US4943349A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1987 |
| Grant date | Jul 24, 1990 |
| Priority date | — |
| Expiry date | Feb 20, 2007 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/69
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Process for using papermaking techniques for preparing a sheet material with improved on-machine retention, sheet material thus obtained and its application, notably in the field of printing and writing, packaging and coverings. The invention relates to a process for using papermaking techniques to make a sheet material. This material copmrises, in addition to the fibres, an organic binder, a non-binding mineral filler and a flocculant, as well as various conventional additives, this process being characterized by the fact that the mineral filler and the binder are flocculated beforehand before being incorporated into the fibre suspension. The material thus prepared has enhanced mineral filler retention and physical properties and can be used as printing and writing medium, covering medium, packaging medium or for obtaining complexes for industrial or foodstuffs use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.