Polylactic acid material for fused deposition molding and preparation method of polylactic acid material
A fused deposition modeling and polylactic acid material technology, which is applied in the field of 3D printing technology and plastic processing to achieve the effect of promoting dispersion, realizing large-scale popularization and production, and broad market prospects.
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[0032] The preparation method of polylactic acid material for fused deposition modeling comprises the following steps:
[0033] (1) Processing of raw materials: prepare various raw materials, and dry polylactic acid, polylactic acid-polyethylene glycol copolymer and inorganic fillers;
[0034] (2) Mixing of reagents and raw materials: first put polylactic acid, polylactic acid-polyethylene glycol copolymer and inorganic filler into the mixer, and then add lubricant after stirring for 1 minute, and then add plasticizer after stirring for 3 minutes, and stir until The surface of the particles is evenly liquid and bright, that is, they are stirred evenly. After the mixing is completed, a stabilizer and an anti-hydrolysis agent are added for subsequent mixing, and the mixing is continued for 2 minutes, and finally the mixed raw material is obtained.
[0035] (3) Heated extrusion: Add the mixed raw materials into the twin-screw extruder, and keep the feeding speed uniform and smoot...
Embodiment 4
[0048] A polylactic acid material for fused deposition molding, which is made of the following raw materials: 100 g of polylactic acid with a weight average molecular weight of 50,000, 1 g of inorganic filler (nano-silica), and polylactic acid-poly Ethylene glycol copolymer (the mass ratio of polylactic acid to polyethylene glycol is 10:1) 2g, lubricant (polyethylene wax) 0.9g, plasticizer (dioctyl phthalate) 1.1g, stabilizer (antioxidant 1010, tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester) 0.2 g, anti-hydrolysis agent (carbodiimide compound) 0.1 g.
[0049] The preparation method of the polylactic acid material for fused deposition molding in this embodiment, the steps are as follows:
[0050] (1) Processing of raw materials: prepare various raw materials, and dry polylactic acid, polylactic acid-polyethylene glycol copolymer and inorganic fillers;
[0051] (2) Mixing of reagents and raw materials: first put polylactic acid, polylactic acid...
Embodiment 5
[0055] A polylactic acid material for fused deposition molding, which is made of the following raw materials: 100 g of polylactic acid with a weight average molecular weight of 100,000, 10 g of inorganic filler (hectorite), and polylactic acid-polyethylene with a weight average molecular weight of 150,000. Glycol copolymer (the mass ratio of polylactic acid and polyethylene glycol is 7:3) 18g, lubricant (oleic acid amide) 1.4g, plasticizer (epoxidized soybean oil) 0.9g, stabilizer (antioxidant 168, tris[2.4-di-tert-butylphenyl] phosphite) 0.1g, anti-hydrolysis agent (polyurethane) 0.2g.
[0056] The preparation method of the polylactic acid material for fused deposition molding in this embodiment is the same as that in Embodiment 4.
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