Heat-protected thermoplastic component, particularly a vehicle underside component with integrated heat-protection

Abstract

A component for use in thermally stressed areas of vehicles, e.g. in the area of the engine compartment underside, comprises a thermoplastic part i.e. a supporting layer ( 2 ) that is thermally protected by a metallic foil ( 3 ). In order to improve the adherence of the metallic foil ( 3 ), the metallic foil ( 3 ) is provided with a multitude of folding pockets ( 4 ) anchored in the thermoplastic material of the supporting layer ( 2 ). This creates a positive connection between the metallic foil ( 3 ) and the supporting layer ( 2 ).

1 . Heat-protected thermoplastic component ( 1 ) having a carrier layer ( 2 ) made of a thermoplastic synthetic and an at least partially connected metallic foil ( 3 ), wherein said foil ( 3 ) comprises a plurality of folding pockets ( 4 ), which are embedded in the carrier layer ( 2 ) and form a positive connection with the carrier layer ( 2 ).  
   
   
       2 . Component according to  claim 1 , wherein the thermoplastic synthetic is an endless fiber reinforced thermoplast (LFT).  
   
   
       3 . Component according to  claim 1 , wherein the thermoplastic synthetic is a glass fiber reinforced synthetic (GMT).  
   
   
       4 . Component according to  claim 1 , wherein the metallic foil ( 3 ) is an aluminium foil.  
   
   
       5 . Component according to  claim 4 , wherein the aluminium foil has a thickness of 0.01 to 0.1 mm.  
   
   
       6 . Component according to  claim 1 , wherein in a sector of 10 to 30 mm there are arrayed at least 1 to 5 folding pockets.  
   
   
       7 . Component according to  claim 1 , wherein, between the metallic foil ( 3 ) and the thermoplastic carrier layer ( 2 ) there is provided a hotmelt adhesive.  
   
   
       8 . Component according to  claim 1 , wherein the peeling resistance W s , after a constant exposure over more than 1000 hours to temperatures of about 140° C., has a value of at least 0.15 N/mm 2 .  
   
   
       9 . Component according to  claim 1 , wherein the peeling resistance W s , after a constant exposure over more than 1000 hours to temperatures of about 140° C., is reduced by no more than 20%.  
   
   
       10 . Component according to  claim 1 , wherein said component is a vehicle underside component.