▎ 摘　　要

NOVELTY - Preparing modified polyester warp knitted fabric involves using graphene, ethylene acrylate copolymer, grafted polyether polyol and silicon melt coupling agent to prepare a mixture, and reacting at 100-120 degrees C for 0.5-2 hours, then adding tea polyphenols, and adopting a twin-screw melt blending method to melt blend the mixture with polyester chips to obtain graphene functional masterbatch. The graphene functional masterbatch and polyester chips are melt-spun, and a screw extruder is used to prepare graphene polyester filaments with a sheath-core structure. The graphene oxide modified polyester filament includes a skin portion and a core portion, the core portion is a polyester fiber, and the skin portion is a polyester fiber containing a graphene functional masterbatch. The mass fraction of graphene functional masterbatch in the skin is 2-6 wt.%. The graphene polyester filaments extruded from the screw extruder are first cooled to 40-45 degrees C in a bath. USE - Method for preparing modified polyester warp knitted fabric. ADVANTAGE - The production process uses graphene-modified polyester as the leather portion, and then biologically modifies the polyester, and can make the surface layer have voids obtained by biological modification, can absorb water, and graphene can make the polyester filament have the functions of antibacterial and health care, and because the polyester filament has a sheath-core structure, and the core can maintain the strength of the polyester filament. DETAILED DESCRIPTION - Preparing modified polyester warp knitted fabric involves using graphene, ethylene acrylate copolymer, grafted polyether polyol and silicon melt coupling agent to prepare a mixture, and reacting at 100-120 degrees C for 0.5-2 hours, then adding tea polyphenols, and adopting a twin-screw melt blending method to melt blend the mixture with polyester chips to obtain graphene functional masterbatch. The graphene functional masterbatch and polyester chips are melt-spun, and a screw extruder is used to prepare graphene polyester filaments with a sheath-core structure. The graphene oxide modified polyester filament includes a skin portion and a core portion, the core portion is a polyester fiber, and the skin portion is a polyester fiber containing a graphene functional masterbatch. The mass fraction of graphene functional masterbatch in the skin is 2-6 wt.%. The skin area accounts for 10-20 wt.%. The graphene polyester filaments extruded from the screw extruder are first cooled to 40-45 degrees C in a bath, and processed in the enzymatic hydrolysis solution containing esterase for 0.5-1 hour. The pH of the enzymatic hydrolysis solution is 7.0-7.5. The three pairs of rollers are used to stretch and shape the graphene polyester filament treated in the previous step, and the stretching ratio is 1.75-1.85.