Formula of enhanced rice hull powder-polylactic acid 3D printing wire and preparation method of 3D printing wire
A 3D printing and rice husk powder technology, which is applied in the direction of additive processing, can solve the problems of limiting the popularization and use of polylactic acid wire, increasing processing costs and energy consumption, and occupying a large area, achieving excellent bio-recyclability and wide-ranging The effect of using scenarios and reducing consumption
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[0036] The present invention provides a method for preparing a 3D printing wire based on the above-mentioned enhanced rice husk powder-polylactic acid 3D printing wire formula, comprising the following steps:
[0037] (1) the modified polylactic acid, modified micro-nano rice husk powder, toughening agent, compatibilizer, talc powder according to the above ratio (modified polylactic acid 82-90wt%; modified micro-nano rice shell powder 2-8wt%; toughening agent 2-4.5%; compatibilizer 2-4.5%; talcum powder 0.5-1wt%) into the reaction cup, manual stirring for 10min to mix evenly to obtain a blend;
[0038] (2) Put the blended material in step (1) into a single-screw extruder, and the single-screw extruder extrudes the blended material through a single screw, and the prepared wire is cut with a wire cutting machine (the model is Ding Bo 150) pelletized to obtain pellets, and dried at 50°C for 1h, wherein the temperature of the feed end and discharge end of the single-screw extruder...
Embodiment 1
[0043] Example 1: Weigh 88g of unmodified polylactic acid, 2g of unmodified micro-nano rice husk powder, 4.5g of polylactic acid-based compatibilizer, 4.5g of polylactic acid-based toughening agent, 1g of talcum powder, and put them into the reaction Manually stir in the cup for 10 minutes, after uniform mixing, use a single-screw extruder to melt and extrude the wire rod, the temperature of the inlet in the left area is 185-187°C, the temperature of the outlet in the right area is 175-176°C, and the screw speed is 37-39r / min , the size and diameter of the extrusion head is 2.3mm; cut the extruded wire rod into pellets and dry them in a 50°C oven for 1h, then put them into a single-screw extruder again for melt extrusion, the temperature of the feed port in the left area is 184-186°C, and the temperature in the right area The outlet temperature is 174-177°C, the screw speed is 38-39r / min, and the diameter of the basic head is 2.3mm. After cooling the wire, the micronano rice hu...
Embodiment 2
[0044] Example 2: Weigh 86g of unmodified polylactic acid, 4g of unmodified micro-nano rice husk powder, 4.5g of polylactic acid-based compatibilizer, 4.5g of polylactic acid-based toughening agent, and 1g of talcum powder, and put them into the reaction Manually stir in the cup for 10 minutes, after uniform mixing, use a single-screw extruder to melt and extrude the wire rod, the temperature of the inlet in the left area is 186-187°C, the temperature of the outlet in the right area is 174-176°C, and the screw speed is 38-39r / min ,The size and diameter of the extrusion head is 2.3mm; the extruded wire is cut into pellets and dried in an oven at 50°C for 1 hour, and then put into a single-screw extruder to melt and extrude, the temperature of the feed port in the left area is 184-185°C, The outlet temperature is 174-175°C, the screw speed is 38-40r / min, and the diameter of the basic head is 2.3mm. After cooling the wire, the micronano rice husk powder reinforced polylactic acid ...
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