A method for preparing a low-smoke halogen-free flame-retardant power cable

Abstract

This invention discloses a method for preparing a low-smoke, halogen-free, flame-retardant power cable, relating to the field of cable technology. The inner and outer sheaths of the cable of this invention utilize a specific flexible rubber material, composed of modified silicone rubber, modified recycled rubber, thermoplastic lignin, surface-modified cerium oxide nanosheets and black phosphorus nanosheets, and a vulcanization system. The modified recycled rubber is obtained through a two-step acid treatment of waste rubber powder, significantly improving its interfacial bonding strength with the matrix and its flame-retardant efficiency. The nanosheets are oriented within the matrix to form a barrier structure. The insulation layer uses a low-dielectric-loss polypropylene composite material. This invention achieves a balance between high flexibility, excellent flame retardancy, low smoke and halogen-free properties, low signal loss, and high reliability, making it suitable for high-frequency, high-speed transmission scenarios.

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