Medium density mixed hardwood flake lamina
US4361612A · kind A · utility
99Cited by
1References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1981 |
| Grant date | Nov 30, 1982 |
| Priority date | — |
| Expiry date | Jul 14, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31989
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A lamina for a medium density structural board made from dimensioned wood flakes cut from a mixture of hardwood species and having a high retained internal bond strength is disclosed. The wood flakes are blended with a phenol formaldehyde resin having a major quantity of a low molecular weight fraction and a wax and then formed into a hot pressed product. The lamina may be used alone or as the core of a structural board having veneer, hardboard or plywood face panels. Three or more lamina may be formed into a structural board or used as the core of a board having veneer, hardboard or plywood face panels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.