The present invention discloses a production method of a hollow composite wave-absorbing fiber, comprising: Step 1: mixing wave-absorbing powder and PET chips, blending and pelletizing through a twin-screw extruder to obtain wave-absorbing PET chips; Step 2: adding terephthalic acid, propanediol and a third monomer into a reaction kettle for esterification, adding nano-aluminum hydroxide after completion for polycondensation, then feeding the reaction slurry as the fiber outer layer into a spinning screw, feeding the chips obtained in Step 1 into the screw as the fiber inner layer, extruding through a profiled spinneret to form a profiled as-spun fiber, and drawing and setting to obtain a primary composite wave-absorbing fiber; Step 3: drawing the primary composite wave-absorbing fiber obtained in Step 2 into a reaction tank containing an acid solution, then drawing it into a tank containing a pyrrole monomer solution for infiltration, and finally adding ferric chloride solution for polymerization. The present invention belongs to the field of functional fiber production, and the prepared profiled polyester fiber has good electromagnetic shielding performance without obvious negative effects.
Country Code: CH
Application Number: CN202410735597.8
