▎ 摘　　要

NOVELTY - A graphene-based enhanced flame retardant recycled polyester staple fiber is prepared by mixing graphene and surfactant, dispersing, adding polyester powder, granulating, mixing phosphorus-based halogen-free flame retardant and polyester powder, reacting, granulating, mixing graphene masterbatch, phosphorus-based flame retardant masterbatch, and recycled polyester material, vacuum drying, melting in screw extruder, pumping into homogenizing mixer, purifying, pumping into post-secondary filters, filtering, melt-spinning, tow cutting, and packaging. USE - Method for preparing graphene-based enhanced flame retardant recycled polyester staple fiber (claimed). ADVANTAGE - The fiber has good synergistic effect, and fiber quality. The method reduces cost, and increases fiber mechanical property. DETAILED DESCRIPTION - A graphene-based enhanced flame retardant recycled polyester staple fiber is prepared by mixing graphene and surfactant at mass ratio of 1-5:1, dispersing to obtain graphene particles, adding polyester powder, granulating using twin screw extruder to obtain graphene masterbatch, mixing phosphorus-based halogen-free flame retardant and polyester powder, reacting, granulating using twin screw extruder to obtain phosphorus-based flame retardant masterbatch, mixing graphene masterbatch, phosphorus-based flame retardant masterbatch, and recycled polyester material, vacuum drying at 90-140 degrees C, melting in screw extruder, pumping into homogenizing mixer for 30-90 minutes, purifying, pumping into post-secondary filters, filtering, melt-spinning at 275-278 degrees C, tow cutting, and packaging.