▎ 摘　　要

NOVELTY - Preparation method of antibacterial and antiviral coated filament containing poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) material involves preparing terylene fiber by terylene slices pinning, mixing with PHBV grain material and spinning to form terylene fiber, and taking terylene fiber filament as core wire, coating outside of core wire with terylene short fiber coating layer by coating process, preferably by (i) taking terephthalic acid and ethylene glycol as raw material, adding catalyst and graphene and preparing polyester chips by direct esterification, (ii) preparing dried PHBV pellet material, adding polyester chips to screw extruder, adding dry PHBV particles, performing high-speed spinning to obtain terylene fiber, and (iii) selecting terylene short fiber as outer fiber, and terylene filament as core wire, opening and cleaning cotton, carding, performing front spinning process of drawing, using jet vortex spinning process outer fiber to spirally cover on core wire. USE - Method useful for preparation of antibacterial and antiviral coated filament containing PHBV material for yarn, fabric, clothing, medical and sanitary product, and home textile product (claimed). ADVANTAGE - The method endows the fiber with non-dissolution and antibacterial properties, and uses pure polyester coating to form a covered filament to fully exert antibacterial and antibacterial properties. The filament has long-term antibacterial and antiviral functions. DETAILED DESCRIPTION - Preparation method of antibacterial and antiviral coated filament containing poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) material involves preparing terylene fiber by terylene slices pinning, mixing with PHBV grain material and spinning to form terylene fiber, and taking one of the terylene fiber filament as core wire, coating outside of the core wire with terylene short fiber coating layer by coating process, preferably by (i) taking terephthalic acid and ethylene glycol as raw material, adding catalyst and graphene, and preparing polyester chips by direct esterification, (ii) preparing the dried PHBV pellet material, adding polyester chips to a screw extruder, adding dry PHBV particles at the same time, performing high-speed spinning to obtain terylene fiber, and (iii) selecting the terylene short fiber as the outer fiber, and the terylene filament as the core wire, opening and cleaning the cotton, carding, performing front spinning process of drawing, using jet vortex spinning process outer fiber to spirally cover on the core wire to form covering wire.