Manufacture of wetlaid nonwoven webs
US4925528A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1989 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Apr 6, 2009 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/57
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for forming a fabric web by wet-laying fibers on paper-making equipment, the web comprising staple length natural or synthetic fibers and optionally wood cellulose papermaking fibers and an adsorbed polymeric surface active agent. The method comprises making up an aqueous fiber furnish with a polymeric surfactant having a plurality of both hydrophilic and hydrophobic groupings per molecule. The polymeric surfactant is adsorbed by the fibers and may be added to the fibers or it may be included in the aqueous carrier medium. In either case, the finished web contains and is improved by the inclusion of the polymeric surfactant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.