▎ 摘　　要

NOVELTY - Sheathing material comprises 100-104 pts. wt. styrene ethylene butylene styrene (SEBS), 65-68 pts. wt. stearic acid, 29-31 pts. wt. polypropylene, 21-23 pts. wt. polypropylene grafted maleic anhydride, 3-4 pts. wt. antioxidant B215, 81-83 pts. wt. magnesium hydroxide, 4.3-5 pts. wt. graphene, 1.6-1.7 pts. wt. silane coupling agent A-171, 8-9 pts. wt. anhydrous ethanol, 6-7 pts. wt. hydrogenated naphthenic oil, 7-8.5 thermoplastic polyurethane, 10-12 pts. wt. nano-zinc oxide, and 4.5-6 pts. wt. rubber powder. USE - Sheathing material used in data lines. ADVANTAGE - The sheathing material has anti-aging property, effectively improves anti-ultraviolet ability of data line sheathing material and enhances the service life of the cable, and is easy to process. DETAILED DESCRIPTION - Sheathing material comprises 100-104 pts. wt. styrene ethylene butylene styrene (SEBS), 65-68 pts. wt. stearic acid, 29-31 pts. wt. polypropylene, 21-23 pts. wt. polypropylene grafted maleic anhydride, 3-4 pts. wt. antioxidant B215, 81-83 pts. wt. magnesium hydroxide, 4.3-5 pts. wt. graphene, 1.6-1.7 pts. wt. silane coupling agent A-171, 8-9 pts. wt. anhydrous ethanol, 6-7 pts. wt. hydrogenated naphthenic oil, 7-8.5 thermoplastic polyurethane, 10-12 pts. wt. nano-zinc oxide, 4.5-6 pts. wt. rubber powder, 1.6-2 pts. wt. silane coupling agent kh-560 and 1-1.2 pts. wt. ultraviolet absorbent UV-9. An INDEPENDENT CLAIM is included for a method for preparing sheathing material, which involves: (A) drying magnesium hydroxide in oven at 110 degrees C for 4 hours, adding silane coupling agent A-171 to anhydrous ethanol and stirring at 500 rotations per minute for 30 minutes, adding dried magnesium hydroxide into high-speed mixe and graphene, under stirring rate of 2000 rotations per minute, stirring at room temperature for 30 minutes, placing at temperature to 60 degrees C, stirring for 30 minutes, drying for 3 hours to get complex flame retardant; (B) drying SEBS, polypropylene and polypropylene grafted maleic anhydride in oven at 80 degrees C for 4 hours, mixing dried SEBS with stearic acid and placing in high speed mixer, stirring rate of 1000 rotations per minute for 20 minutes and allowing to stand for 12 hours to obtain oily SEBS, placing polypropylene and polypropylene grafted maleic anhydride at 170 degrees C, for 10 minutes adding antioxidant B215, mixing for 20 minutes, drying for 2 hours and crushing to obtain a mixed base material; (C) mixing nano-zinc oxide and rubber powder uniformly, then adding silane coupling agent kh-560 on the surface of mixture, then placing in a ball mill, heating to 50 degrees C for 3 hours, taking out and placing in an oven at a temperature of 80 degrees C to obtain dry powder, and heating the thermoplastic polyurethane into a high-speed mixer, stirring at a rate of 1200 rotations per minute for 10 minutes, adding a dry powder and stirring for 20 minutes to obtain mixed material; and (D) mixing all remaining ingredients into a high-speed mixer and mixing for 20 minutes at 170 degrees C, and speed of 500 rotations per minute, then putting into vulcanizing machine, at 180 degrees C, cooling at room temperature, drying at 80 degrees C for 4 hours to obtain final product.