PP filling rope is a type of filler rope made from polypropylene material that is commonly used in cable manufacturing as a flame retardant and high-temperature-resistant filler rope. It is designed to prevent the penetration of water and other contaminants into the cable core, as well as to provide mechanical support and insulation. PP filling rope is known for its good flexibility, high strength, and resistance to acids and alkalis, which makes it a popular choice for various types of cables, including power cables, communication cables, and optical fiber cables.