Dispersible nonwoven
US9512546B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2013 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Jul 31, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/20
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for forming a dispersible nonwoven substrate in an aqueous medium including: a) forming an aqueous nonwoven binder including a selected emulsion polymer wherein the polymer has been modified with a compound comprising a tri-substituted N-atom, the compound having a pKb of from 4 to 7; b) contacting a nonwoven substrate with the aqueous nonwoven binder; c) heating the contacted nonwoven to a temperature of from 120° C. to 220° C.; and d) immersing the contacted heated nonwoven in an aqueous medium having a final pH<5 is provided. A dispersible nonwoven substrate in an aqueous medium formed by the preceding method and a method for providing a dispersed nonwoven in an aqueous medium are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.