The invention discloses a soft low-
smoke halogen-free
flame-retardant
polyolefin cable material and a preparation method thereof. The cable material comprises the following components (based on by
mass part ratio): 80-90 parts of
copolymer of
ethylene-vinylacetate, 10-20 parts of linear low-density
polyethylene, 65-130 parts of an inorganic
fire retardant through surface treatment, 10-30 parts of high-effective
flame retardant synergist, 10-20 parts of high molecular compatilizer, 0.9-1.5 parts of
antioxidant and 1-2 parts of
processing aid. The preparation method comprises the steps of resin blending
extrusion; surface treatment of the inorganic
fire retardant; batching, mixing,
extrusion,
granulation and the like. Compared with the prior art, the invention has the characteristics of predominant
flame retardation (an
oxygen index up to 36), excellent
toughness, excellent bending resistance,
low density (density is only 1.28g / cm<3>), low
smoke, low
corrosion,
low toxicity,
environmental protection, good processability, bright surface of extrudates and the like.