Additives to improve wettability of synthetic paper pulp
US4028452A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 25, 1974 |
| Grant date | Jun 7, 1977 |
| Priority date | — |
| Expiry date | Sep 25, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/47
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Synthetic paper pulp is prepared by extruding a foam sheet of a synthetic thermoplastic fiber forming resin, which resin contains from 0.1 to 5.0 wt. % and preferably from 1 to 2 wt. % of a soap such as aluminum stearate, attenuating the foam sheet as it is extruded and applying either heat or a shearing action to the attenuated sheet to cause it to break down into short fibers containing numerous fibrils. This pulp is then either used directly or blended with natural pulp, wet laid to form a coarse paper and then formed into a final paper product by application of heat and pressure. The soap serves to improve the wettability of the resulting fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.