Flexible, total coverage electromagnetic wave shielding system
The present invention relates to a shielding system for conductor cables as well as to a method for producing said shielding system. The system is characterized in that it comprises a corrugated tube ( 20 ) coated with one or more thin films of high electrical conductivity material ( 30 ) which are reversibly adhered to the surface of said corrugated tube ( 20 ) so that said coating can be uncoupled from the corrugated tube due to high bending values of the tube itself. The shielding system according to the present invention therefore combines the excellent shielding efficacy values of a system having thin metal films with the excellent flexibility properties of a corrugated plastic tube.
1. A shielding device for conductor cables comprising;
a plastic sheath comprising a corrugated tube configured to receive one or more conductor cables;
an outer coating mechanically shaped onto an outer surface of the corrugated tube, the outer coating comprising one or more thin films of a high electric conductivity material; and
an adhesive between said plastic sheath and said outer coating, the adhesive configured to provide reversible adhesion between said outer coating and said corrugated tube, wherein said outer coating may be uncoupled from the corrugated tube when the shielding device is subjected to bending.
2. The shielding device as set forth in claim 1 further comprising a layer of high elasticity polymer material surrounding the one or more thin films metal films.
3. The shielding device as set forth in claim 1 , wherein said adhesive is a pressure sensitive adhesive.
4. The shielding device as set forth in claim 1 , wherein said outer coating comprises one or more thin metal films.
5. The shielding device as set forth in claim 4 , wherein said one or more thin metal films comprise copper or aluminium.
6. The shielding device as set forth in claim 4 , wherein said one or more thin metal films comprise multilayer films comprising a plurality of thin metal layers, aluminium-polyester layers, or aluminium-paper film layers.
7. A method for producing a shielding device for conductor cables comprising:
extruding and corrugating a plastic material to form a plastic sheath in the form of a corrugated tube configured to receive one or more conductor cables;
mechanically shaping an outer coating comprising one or more thin films of a high electric conductivity material on an outer surface of said corrugated tube: and
providing an adhesive between said corrugated tube and said outer coating to provide reversible adhesion between said outer coating and said corrugated tube, wherein said outer coating may be uncoupled from the corrugated tube when the shielding device is subjected to bending.
8. The method as set forth in claim 7 further comprising:
applying a layer of high elasticity polymer material on an outer surface of the outer coating to encapsulate the outer coating within a protective layer and to maintain the reversible adhesion between said outer coating and the corrugated tube.
9. The method as set forth in claim 7 , wherein said adhesive is a pressure sensitive adhesive.
10. The method as set forth in claim 7 , wherein providing the adhesive further comprises depositing the adhesive on an inner surface of said outer coating intended to come into contact with the outer surface of said corrugated tube.
11. The method as set forth in claim 7 , wherein providing the adhesive further comprises depositing the adhesive on the outer surface of the corrugated tube.