The invention discloses a bamboo
fiber reinforced
polylactic acid composite material used for 3D printing and a preparation method for the bamboo
fiber reinforced
polylactic acid composite material. The material is a co-mixture comprising modified bamboo fibers,
polylactic acid,
polypropylene, a compatilizer and a
plasticizer. The invention further provides the preparation method for the bamboo
fiber reinforced polylactic acid
composite material, wherein the preparation method comprises the following steps: preparing the modified bamboo fibers; co-mixing the bamboo fibers, the polylactic acid, the
polypropylene, the compatilizer and the
plasticizer by a high-speed mixer to form co-
mixed materials; fusing, co-mixing, extruding and
pelletizing the co-
mixed materials by a twin-screw
extrusion method, and repeating the extruding twice;
processing the composite material particles into monofilaments by a single screw extruder after
drying. According to the bamboo fiber reinforced polylactic acid composite material, on the basis of keeping the excellent performance of the polylactic acid, elongation at break and
impact resistance of the material are improved. The method is more liable to realize industrialization, and the material has unique color of natural bamboo fibers, and color master batch is not required to add in a
processing process for coloring.