EVA polymers for use as beater saturants
US5565062A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1990 |
| Grant date | Oct 15, 1996 |
| Priority date | — |
| Expiry date | Apr 10, 2010 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/34
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A beater saturation process for forming a nonwoven wet laid composite is provided which comprises the following steps: (I) providing an aqueous dispersion comprising: PA1 (a) 10 to 95% by weight of a water-dispersible, but water-insoluble fiber; PA1 (b) 0 to 80% by weight of a finely divided, substantially water-insoluble, non-fibrous, inorganic filler; PA1 (c) 5 to 50% by weight of an anionically charged emulsion polymer comprising 70 to 90% by weight of a vinyl ester of an alkanoic acid; 10 to 30% by weight ethylene, 0 to 70% by weight of a C.sub.2 -C.sub.8 alkyl acrylate, and 0 to 4% by weight of an anionic functional monomer, (II) colloidally destabilizing the resulting mixture to form a fibrous agglomerate in aqueous suspension; (III) distributing and draining the aqueous suspension on a porous substrate such as a wire to form a wet web; and (IV) drying the web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.