Method for continuous manufacture of foam boards with isocyanate-impregnated facers
US5352510A · kind A · utility
13Cited by
14References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1993 |
| Grant date | Oct 4, 1994 |
| Priority date | — |
| Expiry date | Sep 27, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/651
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for the manufacture of paper faced foam which comprises (a) applying a foam-forming mixture to at least one advancing cellulosic sheet or composite thereof with an air- and/or moisture-impermeable material, the cellulosic sheet (i) being impregnated with cured polyisocyanate, (ii) being sufficiently flexible for unwinding from a roll for conveyance along a production line and (iii) having a moisture content which does not exceed about 10 percent and is evenly distributed throughout the cellulosic sheet, and (b) foaming and curing the faced foam-forming mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.