| abstract |
A method of manufacturing a fire- screening glazing panel comprising at least one layer of intumescent material 15 sandwiched between two structural plies 13, 14 of the panel comprises forming the layer and securing the plies together. In order to avoid or reduce problems associated with drying the layer 15, at least the greater part by volume of this dryer is in granular form. In a second aspect, in order to facilitate degassing of the intumescent layer, such layer 15 is subjected to suction at the edges of the assembly and the assembly is heated by heaters 7, 8 and/or subjected to pressure conditions (e.g. by pump 9) to cause the grains in the layer to form an intumescent body bonding plies 13, 14 together. The invention includes an intermediate product comprising a structural ply bearing an adherent granular intumescent layer, to panels in which such a layer is sandwiched between two structural plies and to panels made by a method as described above. <IMAGE> |