The present invention discloses a high-dielectric poly(lactic acid) composite material for 3D printing and its preparation method, comprising: drying poly(lactic acid) to obtain dried poly(lactic acid); mixing the dried poly(lactic acid), toughening agent, modified filler, antioxidant, light stabilizer, and lubricant to obtain a premixed raw material; feeding the premixed raw material into a twin-screw extruder for extrusion and pelletization to obtain modified pellets; drying the modified pellets, then feeding them into a single-screw extruder to extrude the plastic melt; cooling, air-drying, measuring the filament diameter, drawing, and winding the plastic melt to obtain filament, which is the high-dielectric poly(lactic acid) composite material for 3D printing.
This invention employs high-speed dispersion, mixing, and extrusion techniques to achieve superior dispersion of modified fillers and additives within the polylactic acid system, forming a uniform structure.
The modified polylactic acid material exhibits uniform internal stress distribution and consistent cooling shrinkage during printing, demonstrating excellent molding stability along with enhanced toughness and tensile strength.
Country Code: CN
Application Number: CN202310570255.0
