High-flame-retardant irradiation crosslinking low-smoke halogen-free polyolefin and preparation method thereof

The invention discloses high-flame-retardant irradiation crosslinking low-smoke halogen-free polyolefin which comprises the following components: 45-90% of a thermoplastic base material, 10-20% of a flame retardant, 0.2-0.4% of an antioxidant base material, 0.1-0.2% of a lubricant and 0.1-0.2% of a cross-linking agent. The preparation method comprises the following steps: S1, weighing raw materials: weighing the raw materials through a microbalance according to the component proportion; s2, uniformly mixing, namely adding the weighed raw material components into a high-speed kneading machine, and uniformly mixing; s3, internal mixing operation: adding the mixed raw materials into an internal mixer for internal mixing; s4, extruding and granulating, namely transferring the internally mixed raw materials into a double-screw extruder for melt extrusion; and S5, sampling and detecting: sampling the irradiation crosslinking low-smoke halogen-free flame-retardant polyolefin insulating material particles to detect t