Flame-retardant PP filler yarn is a type of filler material used in cable manufacturing to enhance the flame-retardant properties of cables. It is made of polypropylene (PP) and treated with a flame retardant to reduce the risk of fire in case of a short circuit or other electrical malfunction. The filler yarn is typically used in the construction of power cables, communication cables, and fiber optic cables. It helps to maintain the cable’s roundness, prevent deformation, and improve its tensile strength. The flame-retardant PP filler yarn is available in different sizes and is chosen based on the diameter of the cable and the desired level of flame resistance.