US 12,227,940 B2
Fire retardant board
Erik Gustaf Redin, Lidingö (SE)
Assigned to RE-BOARD TECHNOLOGY AB, Norrköping (SE)
Appl. No. 17/605,517
Filed by RE-BOARD TECHNOLOGY AB, Norrköping (SE)
PCT Filed Apr. 23, 2020, PCT No. PCT/EP2020/061339
§ 371(c)(1), (2) Date Oct. 21, 2021,
PCT Pub. No. WO2020/216846, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 1950497-6 (SE), filed on Apr. 23, 2019.
Prior Publication US 2022/0213682 A1, Jul. 7, 2022
Int. Cl. B32B 3/12 (2006.01); B32B 7/027 (2019.01); B32B 7/12 (2006.01); B32B 15/12 (2006.01); B32B 15/20 (2006.01); E04B 1/94 (2006.01); E04C 2/34 (2006.01)
CPC E04B 1/942 (2013.01) [B32B 3/12 (2013.01); B32B 7/027 (2019.01); B32B 7/12 (2013.01); B32B 15/12 (2013.01); B32B 15/20 (2013.01); E04C 2/3405 (2013.01); B32B 2250/03 (2013.01); B32B 2250/40 (2013.01); B32B 2260/028 (2013.01); B32B 2260/04 (2013.01); B32B 2262/101 (2013.01); B32B 2307/3065 (2013.01); B32B 2607/00 (2013.01); E04C 2002/3444 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A fire retardant board comprising
a core formed from flute paper, wherein the flute paper is pre-impregnated with a flame retardant such that the core is fully impregnated with the flame retardant, wherein the core is formed as a three dimensional body presenting a first face and a second face opposed to said first face and a wall structure defining a plurality of channels intersecting the first face at an angle which is 90 degrees or less than 90 degrees;
a first liner attached to said first face; wherein the first liner consists of (i) a first layer adjacent to the core, the first layer being made of cardboard or paperboard, (ii) a flame-resistant layer adhered to the first layer by a first adhesive, and (iii) a surface layer adhered to the flame-resistant layer by a second adhesive, the surface layer comprised of paper; and
a third adhesive arranged to fix the first liner to the first face of the core.