| abstract |
The invention discloses a method for preparing a carrier-free plastic filling masterbatch, which comprises adding attapulgite into deionized water, heating to 60-90° C., adding metaphosphoric acid, stirring, and ultrasonically treating for 1-3 hours to obtain attapulgite Dispersion; add inorganic fillers to the attapulgite dispersion, mix at 150-250 rpm for 1 min, and then mix at 800-2000 rpm for 5 min to obtain a mixed material; put the mixed material into an extruder for extrusion at room temperature, and the extrusion pressure is 2-5 MPa , the diameter of the extruded particles is controlled at 1-3 mm, the aspect ratio is controlled at 2-4, and the extruded particles are dried at 105-170 ° C for 0.5-1.5 h to obtain the carrier-free plastic filling masterbatch. The invention adopts attapulgite as the binder, and the prepared master batch has low hardness and is easy to disperse in the plastic; the attapulgite, as a natural needle-shaped nano material, can also be used as a reinforcing filler to enhance and toughen the plastic composite. |