US 12,434,457 B2
Wallboard and method of making and using same
Hans-Rolf Conrad, Dormagen (DE); Joerg Heinz Hueneke, Krefeld (DE); and Lars Malindretos, Krefeld (DE)
Assigned to SIEMPELKAMP MASCHINEN -UND ANLAGENBAU GMBH, Krefeld (DE)
Appl. No. 17/621,164
Filed by Hans-Rolf Conrad, Dormagen (DE); Joerg Heinz Hueneke, Krefeld (DE); and Lars Malindretos, Krefeld (DE)
PCT Filed Jul. 9, 2020, PCT No. PCT/EP2020/069446
§ 371(c)(1), (2) Date Jan. 28, 2022,
PCT Pub. No. WO2021/023469, PCT Pub. Date Feb. 11, 2021.
Claims priority of application No. 102019121476.9 (DE), filed on Aug. 8, 2019.
Prior Publication US 2022/0314582 A1, Oct. 6, 2022
Int. Cl. B32B 21/13 (2006.01); B27N 3/02 (2006.01); B27N 3/14 (2006.01); B32B 21/02 (2006.01); E04C 2/16 (2006.01)
CPC B32B 21/13 (2013.01) [B27N 3/02 (2013.01); B27N 3/143 (2013.01); B32B 21/02 (2013.01); E04C 2/16 (2013.01); B32B 2607/00 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A wallboard comprising:
an MDF, HDF, or chip core layer of a mixture of fibers at least 70% from annual plants;
first and second OSB cover layers chemically and/or mechanically bonded to respective opposite faces of the core and each formed of a mixture of binder and lignin-containing particles at least 70% from perennial plants;
an intermediate layer between the core and one of the layers, having a mixture formed from at least 5% annual—and perennial-plant lignin-containing particles, and serving to reduce interfacial tensions between the core and the one cover layer.