US 12,330,445 B2
Method to produce a building panel and a semi-finished product
Hans Persson, Perstorp (SE); and Marcus Bergelin, Lerberget (SE)
Assigned to VÄLINGE INNOVATION AB, Viken (SE)
Filed by Välinge Innovation AB, Viken (SE)
Filed on Jul. 14, 2021, as Appl. No. 17/375,046.
Application 17/375,046 is a continuation of application No. 16/062,277, granted, now 11,090,972, previously published as PCT/SE2016/051294, filed on Dec. 20, 2016.
Claims priority of application No. 1551683-4 (SE), filed on Dec. 21, 2015.
Prior Publication US 2022/0063326 A1, Mar. 3, 2022
Int. Cl. B44C 5/04 (2006.01); B32B 3/06 (2006.01); B32B 3/14 (2006.01); B32B 5/00 (2006.01); B32B 5/02 (2006.01); B32B 7/12 (2006.01); B32B 13/08 (2006.01); B32B 13/14 (2006.01); B32B 19/04 (2006.01); B32B 19/06 (2006.01); B32B 21/02 (2006.01); B32B 21/06 (2006.01); B32B 21/08 (2006.01); B32B 21/10 (2006.01); B32B 27/10 (2006.01); B32B 27/12 (2006.01); B32B 27/20 (2006.01); B32B 29/00 (2006.01); B32B 29/02 (2006.01); B32B 37/12 (2006.01); B32B 38/00 (2006.01); B32B 38/14 (2006.01); E04F 15/10 (2006.01); B44C 1/24 (2006.01); E04F 15/02 (2006.01)
CPC B44C 5/0492 (2013.01) [B32B 3/06 (2013.01); B32B 3/14 (2013.01); B32B 5/00 (2013.01); B32B 5/022 (2013.01); B32B 5/024 (2013.01); B32B 7/12 (2013.01); B32B 13/08 (2013.01); B32B 13/14 (2013.01); B32B 19/046 (2013.01); B32B 19/06 (2013.01); B32B 21/02 (2013.01); B32B 21/06 (2013.01); B32B 21/08 (2013.01); B32B 21/10 (2013.01); B32B 27/10 (2013.01); B32B 27/12 (2013.01); B32B 27/20 (2013.01); B32B 29/002 (2013.01); B32B 29/005 (2013.01); B32B 29/02 (2013.01); B32B 37/12 (2013.01); B32B 38/14 (2013.01); B32B 38/145 (2013.01); B44C 5/04 (2013.01); B44C 5/0476 (2013.01); E04F 15/107 (2013.01); B32B 29/00 (2013.01); B32B 2250/02 (2013.01); B32B 2250/03 (2013.01); B32B 2255/00 (2013.01); B32B 2255/08 (2013.01); B32B 2255/10 (2013.01); B32B 2255/12 (2013.01); B32B 2255/26 (2013.01); B32B 2260/021 (2013.01); B32B 2260/028 (2013.01); B32B 2260/046 (2013.01); B32B 2262/062 (2013.01); B32B 2307/4023 (2013.01); B32B 2307/718 (2013.01); B32B 2307/7246 (2013.01); B32B 2307/73 (2013.01); B32B 2307/75 (2013.01); B32B 2419/00 (2013.01); B32B 2419/04 (2013.01); B32B 2471/00 (2013.01); B32B 2479/00 (2013.01); B32B 2607/00 (2013.01); B44C 1/24 (2013.01); E04F 15/02 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A method to produce a building panel, comprising
providing a substrate,
applying a thermosetting binder in dry form on the substrate for forming a sub-layer,
controlling the moisture content of the sub-layer when arranged on the substrate,
applying a sheet on the sub-layer, while the sub-layer is sticky from applied moisture, wherein the sheet comprises one or more of a paper sheet, a non-woven, a woven fibre sheet, or a fibre sheet, and wherein the sheet further comprises pigments and/or fillers, and
pressing the substrate, the sub-layer and the sheet together to form a building panel, thereby the thermosetting binder of the sub-layer impregnates the sheet,
wherein controlling the moisture content of the sub-layer comprises:
controlling adhesion of the sheet to sub-layer by applying moisture to the sub layer; and
controlling flow of the thermosetting binder of the sub-layer.