Process for capillary dewatering of foam materials and foam materials produced thereby
US6158144A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1999 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Jul 14, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF26B13/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to a method and several exemplary apparatus for capillary dewatering of foam materials. The apparatus may include felt which is applied to an exposed face of the foam material, or a double felt arrangement applied to two opposed surfaces of the foam material. The apparatus may provide a temperature differential between the two exposed surfaces of the foam material. An alternative embodiment utilizes a roll having a capillary dewatering medium. The capillary dewatering medium may be maintained at a vacuum either above or below the breakthrough vacuum of the capillaries. The disclosed apparatus and method are particularly useful for dewatering foams having relatively fine open capillaries.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.