Back to results
US 9,573,343 B2Granted
Composite boards and panels
AssigneeCeraloc Innovation AB
InventorDarko Pervan
Life of this patent
Estimating the term…
Abstract
A building panel (1) including a water resistant core (5) including thermoplastic material 21 and a surface layer (4) including thermosetting resins. Also, production methods to form a board material (1′) with a dry blend of thermoplastic particles 21a in powder form and fillers in powder form and to apply a surface layer (4) with a hot-hot lamination process to a core (5) including such board material.
Claims20
A method to produce a building panel, the method comprising:
- providing a core by forming a mat shaped layer comprising a dry blend of wood particles in powder form and thermoplastic particles in powder form, heating and cooling the mat shaped layer under pressure such that a sheet is formed after pressing,
- applying a surface layer comprising a powder mix comprising wood particles and thermosetting resin on the core,
- laminating the powder based surface layer in a hot-hot pressing operation to the core and thereby forming a building panel, wherein the wood particles of the surface layer and of the core are bonded to each other by cured thermosetting resin.
A method to produce a building panel, the method comprising:
- applying a dry blend of wood particles in powder form and thermoplastic particles in powder form on a conveyor,
- heating the dry blend on the conveyor while applying pressure to the dry blend to melt the dry blend,
- cooling the melted dry blend on the conveyor while applying pressure to the melted dry blend such that a sheet is formed after the cooling,
- applying a surface layer comprising a powder mix comprising wood particles and thermosetting resin directly on the sheet, and
- laminating the powder based surface layer in a hot-hot pressing operation to the sheet, the hot-hot pressing operation being a pressing operation with a closing temperature within 10° C. of an opening temperature, the hot-hot pressing operation causing the thermosetting resin to bond the wood particles of the surface layer to the wood particles of the sheet to form the building panel.
2 more elements
Dependencies are inferred from the claim text.