▎ 摘　　要

NOVELTY - High-strength flame-retardant elastic fabric comprises 20-30 pts. wt. polyethylene terephthalate, 20-30 pts. wt. polytrimethylene terephthalate and 4-6 pts. wt. graphene oxide, 4-8 pts. wt. modified microspheres. The modified microspheres are prepared from layered hydroxide, sodium alginate and ammonium polyphosphate. The high-strength flame-retardant elastic fabric is prepared by mixing ammonium polyphosphate and water at mass ratio of 1:10. The pH is adjusted to 12 to obtain ammonium polyphosphate solution. The magnesium and aluminum nitrate are mixed at mass ratio of 1.5:1.0-1.8:1.0. The water 18-30 times the mass of magnesium nitrate is added, stirred and mixed to obtain mixed salt solution. USE - High-strength flame-retardant elastic fabric. ADVANTAGE - The high-strength flame-retardant elastic fabric has excellent flame-retardant performance and breaking strength. DETAILED DESCRIPTION - High-strength flame-retardant elastic fabric comprises 20-30 pts. wt. polyethylene terephthalate, 20-30 pts. wt. polytrimethylene terephthalate and 4-6 pts. wt. graphene oxide, 4-8 pts. wt. modified microspheres. The modified microspheres are prepared from layered hydroxide, sodium alginate and ammonium polyphosphate. The high-strength flame-retardant elastic fabric is prepared by mixing ammonium polyphosphate and water at mass ratio of 1:10. The pH is adjusted to 12 to obtain ammonium polyphosphate solution. The magnesium and aluminum nitrate are mixed at mass ratio of 1.5:1.0-1.8:1.0. The water 18-30 times the mass of magnesium nitrate is added, stirred and mixed to obtain mixed salt solution. The mixed salt solution is mixed with ammonium polyphosphate solution in mass ratio of 1:8, and dripping rate of the mixed salt solution is controlled to 2- 5mL/minute, filtered and dried to obtain composite layered material. The composite layered material is mixed with water in mass ratio of 1:20, and 3-6 times the mass of the composite layered sodium alginate is added. The sodium alginate mixed dispersion is dropped into calcium chloride solution with mass fraction of 5% at rate of 2-5 mL/minute. The sodium alginate mixed dispersion is dropped, filtered, dried, and sieved. The polytrimethylene terephthalate and material obtained are mixed in twin-screw extruder at mass ratio of 6:1, mixed and extruded. The polyethylene terephthalate and the material obtained are mixed in twin-screw extruder at mass ratio of 1:1.25, and melted and extruded. The mixed spinning material is obtained. The mixed spinning material is spinned, cooled to obtain fibril, and stretched the fibril to 2.8-4.0 times the fibril under the condition of 120-160 degrees C. The substance obtained is mixed with dopamine hydrochloride solution at mass ratio of 1:12, and graphene oxide 3 to 4 times the mass of the composite fiber are added, soaked, filtered, washed, and dried. The fiber obtained is twisted to 50-75D to obtain yarn count which is woven in a weaving machine at weight of 120g/m2 to obtain high-strength flame-retardant elastic fabric. The index analysis is performed on the high-strength flame-retardant elastic fabric obtained. The high-strength flame-retardant elastic fabric includes 25 pts. wt. of polyethylene terephthalate, 25 pts. wt. of polytrimethylene terephthalate, 5 pts. wt. of graphene oxide and 6 pts. wt. of modified microspheres. The temperature of the five zones in the twin-screw extruder during the mixing and extrusion process are 220 degrees C, 235 degrees C, 240 degrees C, 240 degrees C and 240 degrees C. The temperature in the five zones of the twin-screw extruder during melt extrusion are 270 degrees C, 295 degrees C, 280 degrees C, 280 degrees C and 285 degrees C. The spinning conditions includes spinning temperature of 300 degrees C, spinning speed is 800m/min, diameter of the spinneret is 99.5 millimeter, and length to diameter ratio of the spinneret is 3:1. The dopamine hydrochloride solution is used to mix dopamine and 5% hydrochloric acid in mass ratio of 1:12 to obtain dopamine hydrochloride solution.