Process for applying a topcoat to a porous basecoat
US6475612B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 2000 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Jan 27, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249953
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process is provided that allows the production of multi-layer coatings in which one or more topcoats can be applied to a porous basecoat to produce a uniform and defect-free coating layer. Specifically, a process is provided in which a liquid is applied to the basecoat prior to topcoating such that the air in the basecoat is removed prior to topcoating. This process can occur in-line with a simple apparatus described herein. An added benefit of this method is that it also allows the possibility of adding functionality or performing chemistry to a basecoat after the basecoat is dried and before the topcoat is applied in a single process. For example, the wetting fluid may contain, but is not limited to, surfactants, pH modifiers, polymers, crosslinkers, pigments, and/or dye stabilizers. Advantages over what has been done before include the use of re-wetting process that allows a topcoat to be applied to a porous basecoat that is coated on a non-porous substrate such that bubbles are not formed in the topcoat. In addition, there is added flexibility of incorporating functionality or chemistry in the re-wetting process. Finally, the process is simple to implement and is compatible w…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.