Mineral Fibre Insulation Board

Abstract

A mineral fibre board having at least two resilient edges in order to prevent any small gaps in the joints between two adjacent boards when these are installed. The purpose of the invention is to improve the effect of the insulation layer and thereby either reducing the heat loss to a minimum in order to comply with new standards for low energy consumption buildings or to improve the fire properties of a fire protection insulation layer on e.g. steel constructions. The invention also concerns a method for producing the mineral fibre board by mechanical compression by rollers.

1 - 18 . (canceled) 
   
   
       19 . A mineral fibre insulation board comprising mineral fibres and a binder, said board having two major surfaces being approximately parallel to each other and four minor surfaces forming the side surfaces of the insulation board, where at least two of the minor surfaces each represents a surface of a zone of the board being resilient to a greater extent than the remaining part of the board and extending a distance into the insulation board, said zone being resilient to such an extent as to prevent substantially any gaps to neighboring boards when compressed against these during installation and said board having a density of more than 60 kg/m 3 , wherein only two minor surfaces are provided with said zone, said two surfaces having one corner in common. 
   
   
       20 . A mineral fibre insulation board according to  claim 19 , said greater resiliency being such that the zone is compressible by hand. 
   
   
       21 . A mineral fibre insulation board according to  claim 19 , wherein said zone extends for a distance into the insulation board measured perpendicularly to said minor surface of at least 5 mm. 
   
   
       22 . A mineral fibre insulation board according to  claim 19 , wherein said zone extends for a distance into the insulation board measured perpendicularly to said minor surface of no more than 50 mm along the entire length, or the major length, of said minor surface. 
   
   
       23 . A mineral fibre insulation board according to  claim 19 , wherein the insulation board comprises at least two layers of mineral fibre insulation having different densities and extending parallel with said major surface. 
   
   
       24 . An insulating construction comprising an inner surface against which one layer of insulation boards is installed and fastened by fastening means and an outer covering layer wherein the insulation layer comprises one layer of insulation boards according to  claim 19 . 
   
   
       25 . An insulating construction according to  claim 24 , wherein the insulation boards are fastened by mechanical means. 
   
   
       26 . An insulating construction according to  claim 25 , wherein the fastening means is placed along parts of the edges of the insulation boards. 
   
   
       27 . An insulating construction according to  claim 24 , wherein the outer covering layer is chosen from metal foil, render, wood, etemit, compressed mineral fibre boards, paint, and fleece, and mixtures thereof. 
   
   
       28 . An insulating construction according to  claim 24 , wherein there is an open space where air may circulate between the insulation layer and the outer covering layer. 
   
   
       29 . An insulating construction according to  claim 24 , wherein the inner surface is the facade of a building. 
   
   
       30 . An insulating construction according to  claim 24 , wherein the inner surface is a steel construction. 
   
   
       31 . A method for producing a mineral fibre insulation board for heat, sound, or fire insulation comprising mineral fibres and a binder, said board having two major surfaces being approximately parallel to each other, and having four minor surfaces where at least two minor surfaces represent a surface of a resilient zone of the board wherein said mineral fibre insulation having a density of at least 60 kg/m 3  and the method comprises the following steps:
 (a) mixing mineral fibres and a binder into a web;   (b) curing the binder; and   (c) providing two of said minor surfaces that have one corner in common, with a resilient zone by a mechanical treatment comprising that the boards pass a zone where rollers compress said two minor surfaces to make the board more resilient in that zone.   
   
   
       32 . A method according to  claim 31 , wherein only one board passes the said zone with rollers at a time. 
   
   
       33 . A method according to  claim 31 , wherein the board is supported on the majority of its top surface while passing the zone with rollers. 
   
   
       34 . A method according to  claim 31 , wherein more than one roller is applied and the rollers extend different distances into the minor surface of the board. 
   
   
       35 . A mineral fibre insulation board according to  claim 19 , wherein said board having a density of more than 70 kg/m 3 . 
   
   
       36 . A mineral fibre insulation board according to  claim 19 , wherein said board having a density of more than 80 kg/m 3 . 
   
   
       37 . A mineral fibre insulation board according to  claim 19 , wherein said two minor surfaces are perpendicular to each other. 
   
   
       38 . A mineral fibre insulation board according to  claim 21 , wherein said zone extends for a distance into the insulation board measured perpendicularly to said minor surface of at least 8 mm. 
   
   
       39 . A mineral fibre insulation board according to  claim 22 , wherein said zone extends for a distance into the insulation board measured perpendicularly to said minor surface of no more than 30 mm, along the entire length, or the major length, of said minor surface. 
   
   
       40 . A mineral fibre insulation board according to  claim 22 , wherein said zone extends for a distance into the insulation board measured perpendicularly to said minor surface of no more than 20 mm, along the entire length, or the major length, of said minor surface. 
   
   
       41 . An insulating construction according to  claim 30 , wherein the steel construction is a load carrying steel construction which needs to be fire protected. 
   
   
       42 . A method for producing a mineral fibre insulation board for heat, sound, or fire insulation according to  claim 31 , wherein the two of said minor surfaces are perpendicular to each other. 
   
   
       43 . A method according to  claim 34 , wherein a first roller extends a shorter distance into the board than a following roller.