The invention belongs to the field of low-
smoke halogen-free
flame retardant materials, and particularly relates to an
irradiation crosslinking
halogen-free
flame retardant
polyolefin material for locomotive wires and a preparation method of the
irradiation crosslinking
halogen-free
flame retardant
polyolefin material. The
polyolefin material comprises the following components in parts by
mass: 20-30 parts of
ethylene-
vinyl acetate copolymer, 10-20 parts of polyolefin
elastomer, 5-10 parts of a macromolecular compatilizer, 45-65 parts of an inorganic flame retardant subjected to
surface modification treatment, 5-10 parts of a flame retardant synergist, 0.8-1.5 parts of an
antioxidant, 1.5-2.5 parts of
silicone masterbatches, 0.3-0.6 part of a crosslinking sensitizer, 1.5-2 parts of
carbon black and 1-2 parts of a
processing aid. The preparation method comprises the technological steps of surface treatment of the inorganic flame retardant, proportioning, mixing, melting,
extrusion for pelletization, and the like. Compared with the prior art, the polyolefin material has the characteristics of excellent flame retardation (capable of passing the D type group burning test), oil resistance (
mineral oil and
fuel oil resistant), high
temperature resistance (the grade is 150 DEG C),
ultraviolet resistance, scratch resistance, low
corrosion,
low toxicity, environment friendliness, excellent
processing performance,
extrusion speed capable of reaching 100-150 m / min, and bright surface.