Thermal insulating panel

Abstract

The invention relates to a thermal insulating panel used for the insulation of buildings. The thermal insulating panel has some rectangular or trapezoidal channels, delimited some ribs obtained by extrusion or injection molding, the average ratio of the width of the channels and the width of the ribs ranging from 18:1 to 3:1, one of the dimensions characterizing by the volume of the channels being smaller than the size at which convection of the air occurs in the channels, such that the thermal exchange to be made exclusively by air conduction.

1 . Thermal insulating panel with channels characterized in that it comprises a substantially flat face ( 8 ,  10 ) and some rectangular ( 1 ) or trapezoidal ( 3 ) channels having one of the dimensions that characterize the volume smaller than the size at which the convection of the air occurs in the channels, the channels ( 1 ,  3 ) being delimited by some ribs ( 2 ,  4 ) arranged substantially perpendicular to the flat face ( 8 ,  10 ), the average ratio between the width of the channel ( 1 ,  3 ) and the width of the ribs ( 2 ,  4 ) being in a range from 18:1 to 3:1, such that to provide a thermal conductivity of λ=0.023 W/m×K. 
     
     
         2 . Thermal insulating panel according to  claim 1 , wherein the panel is obtained by extrusion or injection molding, respectively. 
     
     
         3 . Thermal insulating panel according to  claim 1 , wherein the channels ( 1 ,  3 ) have a width of less than 19 mm.