Composite Shielding Tape for Water Blocking in Compact Cables

The patent combines water blocking functionality with RF shielding tape by integrating a water blocking layer (containing hydrophobic particles or wax) into the shielding tape structure. This merging of functions allows the same tape to provide both electromagnetic shielding and water resistance, eliminating the need for separate water blocking tape and reducing overall cable thickness.

The shielding tape is designed to perform multiple functions simultaneously: RF shielding through metallic layers and water blocking through the hydrophobic water blocking layer. This multi-functional design allows a single component to address both shielding and waterproofing requirements, avoiding the thickness increase that would result from adding separate functional layers.

The patent changes the physical state and composition parameters of the water blocking material from a liquid/gel formulation to a solid particulate or wax-based system embedded in the tape structure. This parameter change allows the material to maintain its water blocking properties across a wide temperature range without experiencing viscosity reduction and flow, thereby maintaining both water resistance and compositional stability at high temperatures.

The water blocking layer uses solid hydrophobic particles or wax that are embedded in the tape matrix, creating a stable, temperature-resistant water blocking mechanism that does not rely on viscous liquids. This approach replaces the temperature-sensitive liquid/gel system with a solid-based system that maintains its protective function under varying thermal conditions.