Patent ID: 8192818
Filing Date: 2012-06-05
Classification: B32B,E04B,E04C,E04D,E04F,Y10T

Abstract:
1. A longitudinal sandwich element ( 1 ) comprising a core ( 10 ) of binder fixed mineral wool lamellae ( 2 ) assembled in a side by side relationship extending in the longitudinal direction of the sandwich element ( 1 ), the core ( 10 ) having two major surfaces ( 3 ) substantially parallel to each other, and two end surfaces ( 4 ) substantially perpendicular to the major surfaces ( 3 ) and parallel to each other and two side surfaces ( 5 ) interconnecting the major surfaces ( 3 ) and the end surfaces ( 4 ), where the mineral wool fibers are mainly perpendicular to the major surfaces ( 3 ), and at least one sheet ( 7 ) is attached to at least one of the major sides ( 3 ) of the core ( 10 ), and at least one of the two side surfaces ( 5 ) is provided by one or more side lamellae ( 6 ), and where at least one of the side surfaces ( 5 ) has been formed as a cut section ( 8 ) into the one or more side lamella(s) ( 6 ) said cut section ( 8 ) being capable to fit into a mating cut section ( 8 ) of one or more other side lamella(s) ( 6 ) of an adjacent sandwich element ( 1 ), where each side lamella ( 6 ) has a varying density and the cut section ( 8 ) is comprised in the region ( 9 ) with the higher density, where the lamellae ( 2 ) in the core have a substantially homogeneous density, and where the side lamella has a density which varies smoothly from the higher to the lower density along a direction from the side surface inwards into the core.