Polypropylene cable protective layer and preparation method thereof

A polypropylene cable protection layer, wherein the polypropylene cable protection layer sequentially comprises a dielectric layer, a buffer layer and an insulating layer from the inside to the outside, and the thickness of the dielectric layer accounts for 5%˜12% of the thickness of the polypropylene cable protective layer;

• the thickness of the buffer layer accounts for 17%˜25% of the thickness of the polypropylene cable protective layer;
• the dielectric layer is obtained by the wrapping of a polypropylene film A, and the buffer layer is obtained by the wrapping of a polypropylene film B, and the insulating layer is obtained by the wrapping of a polypropylene film C;
• the polypropylene film A comprises the following components in parts by weight:
• 100 parts of polypropylene, 8˜10 parts of graphene oxide and 0.5˜5 parts of maleic anhydride grafted polypropylene, and the thickness of the polypropylene film A is 0.05˜0.2 mm;
• the polypropylene film B comprises the following components in parts by weight:
• 100 parts of polypropylene, 4˜6 parts of graphene oxide and 0.5˜5 parts of maleic anhydride grafted polypropylene, and the thickness of the polypropylene film B is 0.05˜0.2 mm;
• the polypropylene film C comprises the following components in parts by weight:
• 100 parts of polypropylene and 0.5˜5 parts of maleic anhydride grafted polypropylene, and the thickness of the polypropylene film C is 0.05˜0.2 mm.