Plate-shaped or tubular insulating material

Abstract

The invention relates to an insulating material in the form of plates or tubes, comprising a layer of expanded rubber ( 11 ). The main surface ( 12 ) of said layer is the surface which comes into contact with an object to be insulated, and a protective layer is adhesively connected ( 16 ) to the opposite main surface ( 13 ) of said layer. In order to increase the flame resistance, said protective layer consists of a mat-shaped glass fibre material ( 14 ) which is externally coated by a metal or a polymer ( 15 ).

1 . Insulating material in the form of plates or tubes comprising 
 an inner layer ( 11 ) of plastic foam, the inner surface of which is the contact surface ( 12 ) with an object to be insulated,    an intermediate layer ( 14 ) consisting of a non-woven glass fiber fabric, which layer is adhesively connected with the outer surface ( 13 ) of the inner layer ( 11 ), and    an outer layer ( 15 ) being connected with the intermediate layer ( 14 ),    characterized in that    the plastic foam of the inner layer ( 11 ) consists of expanded rubber,    the non-woven glass fiber fabric of the intermediate layer ( 14 ) has a thickness of 0,2 to 0,4 mm,    the outer layer ( 15 ) is a coating on the non woven glass fabric, which coating is made of a metal or a polymer and is of a thickness of 0,05 to 1 mm, and    the inner layer ( 11 ) is connected to the intermediate layer ( 14 ), which is bearing the coating, by means of a fire-retardant adhesive ( 16 ).    
     
     
         2 . Insulating material according to  claim 1 , characterized in that the metal of the coating consists of aluminium or copper.  
     
     
         3 . Insulating material according to  claim 1 , characterized in that the polymer of the coating is polyurethane, polyvinyl acetate, polyvinyl chloride or an anorganic or organic silicone compound.  
     
     
         4 . Insulating material according to one of the preceding claims, characterized in that the intermediate layer ( 14 ), bearing the outer layer ( 15 ), is protruding beyond two opposite sides of the plate or beyond the front faces of the tube or beyond an installation pre-slit ( 17 ) running in circumferential direction of the tube, thus allowing for an overlap.