The present invention relates to an electromagnetic wave absorbing filament and its preparation method, belonging to the technical field of functional fibers. The preparation method adopts a magnetic stretching spinning system as the production device, including a twin-screw extruder, a magnetic heating device and a multi-stage magnetic stretching device. The preparation steps are as follows: S1. Mix marine plastic, nano inorganic magnetic material, nano modifier, filler, auxiliary agent and silane coupling agent uniformly in a twin-screw extruder, and prepare functional masterbatches through granulation; the marine plastic is selected from PP plastic and/or PET plastic; S2. Heat the functional masterbatches by the magnetic heating device to obtain molten masterbatches; S3. Extrude the molten masterbatches through a pinhole plate to obtain primary fibers; S4. Stretch the primary fibers via the multi-stage magnetic stretching device to obtain electromagnetic wave absorbing filaments with uniform component distribution, excellent electromagnetic shielding performance and other comprehensive properties.
Country Code: CN
Application Number: CN202410876031.7
