HFFR PP filler rope, also known as Halogen-Free Flame Retardant Polypropylene Filler Rope, is a type of filler material used in communication cables, power cables, and fiber optic cables. It is made of polypropylene material that is flame retardant and halogen-free. The HFFR PP filler rope is used to fill the empty space in the cable and to prevent moisture from entering the cable. The semi-conductive properties of the filler rope also help in maintaining the electric field of the cable. HFFR PP filler rope is widely used in the telecommunication and power industries due to its flame retardant properties and low smoke emission in case of fire.