	US 11,787,741 B2
	Method for recycling mineral wool, a method for production of acoustical panel elements and such an acoustical panel element
Ola Karlsson, Lund (SE); and Torbjorn Persson, Helsingborg (SE)
Assigned to SAINT-GOBAIN ECOPHON AB, Hyllinge (SE)
Appl. No. 17/271,083
Filed by SAINT-GOBAIN ECOPHON AB, Hyllinge (SE)
PCT Filed Aug. 28, 2019, PCT No. PCT/EP2019/072949 § 371(c)(1), (2) Date Feb. 24, 2021, PCT Pub. No. WO2020/048843, PCT Pub. Date Mar. 12, 2020.
Claims priority of application No. 18192260 (EP), filed on Sep. 3, 2018.
Prior Publication US 2021/0317040 A1, Oct. 14, 2021
Int. Cl. C04B 28/00 (2006.01); C04B 14/42 (2006.01); C04B 14/46 (2006.01); C04B 16/06 (2006.01); C04B 18/26 (2006.01); C04B 40/00 (2006.01); C04B 103/10 (2006.01); C04B 111/00 (2006.01); C04B 111/52 (2006.01)

CPC C04B 28/006 (2013.01) [C04B 14/42 (2013.01); C04B 14/4618 (2013.01); C04B 16/06 (2013.01); C04B 18/26 (2013.01); C04B 40/0046 (2013.01); C04B 2103/10 (2013.01); C04B 2111/00603 (2013.01); C04B 2111/00612 (2013.01); C04B 2111/52 (2013.01)]

17 Claims

1. An acoustical geopolymer panel element comprising:

a layer comprising a fibre component and a geopolymer binder comprising ground mineral wool, and

an additional layer comprising mineral wool,

wherein the layer comprising a fibre component and a geopolymer binder has a density in the range of 20-400 kg/m³, a porosity in the range of 0.75-0.99 and a thickness in the range of 5-75 mm.