▎ 摘　　要

NOVELTY - Sheathing material comprises 90-94 pts. wt. styrene ethylene butylene styrene (SEBS), 65-68 pts. wt. paraffin oil, 29-31 pts. wt. stearic acid, 21-23 pts. wt. stearic acid 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, 6-8 pts. wt. pentaerythritol, 12-14 pts. wt. carbon black, 6-7.5 pts. wt. calcium molybdate, 3-4 pts. wt. antioxidant 168, 13-15 pts. wt. natural rubber and 1-1.5 pts. wt. calcium and zinc heat stabilizer. USE - Sheathing material used in data lines. ADVANTAGE - The sheathing material has calcium molybdate resistance, flame resistance, good mechanical property, and good low temperature flexibility. DETAILED DESCRIPTION - 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, stearic acid and stearic acid grafted maleic anhydride in oven at 80 degrees C for 4 hours, mixing dried SEBS with paraffin oil 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 stearic acid and stearic acid 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; (C) drying carbon black and calcium molybdate in oven at 80 degrees C for 2 hours, and then crushing to obtain 200 mesh powder, adding natural rubber into the plastic molding machine, and kneading at temperature of 100 degrees C for 10 minutes, adding 200 mesh powder in pentaerythritol and allowing to stand for 10 minutes, drying and crushing to granules to obtain a 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.