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Polylactic acid 3D printing material and wire prepared from polylactic acid 3D printing material

A 3D printing and polylactic acid technology, which is applied in the field of polylactic acid 3D printing materials and wires prepared therefrom, can solve the problems of wire extrusion stability not mentioned, and achieve the effect of good wire extrusion stability.

Inactive Publication Date: 2018-04-20
KINGFA SCI & TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Patent application number: 201510069937.9 discloses a 3D printing PLA consumable and its preparation method. The 3D printing PLA consumable is made of the following raw materials by weight percentage: PLA plastic 99.3-99.7%, pigment 0.1-0.3%, additive 0.2-0.4% %, but not mentioned for wire extrusion stability

Method used

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  • Polylactic acid 3D printing material and wire prepared from polylactic acid 3D printing material
  • Polylactic acid 3D printing material and wire prepared from polylactic acid 3D printing material
  • Polylactic acid 3D printing material and wire prepared from polylactic acid 3D printing material

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preparation example Construction

[0036] The preparation method of polylactic acid is as follows:

[0037] Add L-lactic acid, D-lactic acid monomer and ZnO in the ratio of Table 1 into the reaction vessel, stir evenly, react at 80-140°C and 4-10 KPa pressure for 6-12 h, distill off water, and form low Polymer. Add ZSM-5 molecular sieves to the reaction product in a vacuum distillation reaction vessel, stir evenly, and conduct vacuum distillation at 170-210°C and 102-103 Pa pressure until no product is distilled out. The time is 7-15 hours to obtain propane lactide products.

[0038] Table 1 Reactant Raw Material Composition Ratio

[0039]

[0040] Accurately weigh a certain amount of the lactide product prepared in Table 1 into a sealed tube, then add a certain amount of stannous isooctanoate dichloromethane solution, and remove the solvent dichloromethane at room temperature. Place the sealed tube at room temperature, evacuate, inject high-purity nitrogen, and repeat three times. After evacuating for h...

Embodiment 1-6

[0043] Example 1-6: Preparation of polylactic acid 3D printing materials

[0044] Mix PLA and processing aids according to the parts by weight shown in Table 3, put them into a twin-screw extruder, extrude and pelletize at 160°C-180°C, and obtain polylactic acid 3D printing materials;

[0045] Pull the polylactic acid 3D printing material obtained in step (1) on a single-screw extruder, control the single-screw extrusion temperature to 160°C-210°C, and control the water tank temperature to 40°C-60°C to obtain polylactic acid 3D printing wire, wherein the diameter of the extruded wire is 1.75cm, and the extrusion speed of the wire is 45Kg / h. The performance test results are shown in Table 1.

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Abstract

The invention discloses a polylactic acid 3D printing material and a wire prepared from the polylactic acid 3D printing material. The polylactic acid 3D printing material comprises: (a) 98.0-100 partsof polylactic acid and (b) 0-2.0 parts of a processing auxiliary agent. With respect to the total weight of polylactic acid, the weight of D-polylactic acid is 0.3-5%. The structure of the polylacticacid 3D printing material satisfies the following relation: 0 DEG C<=Tx-Ty<=60 DEG C, wherein Tx is the maximum weight loss rate temperature of the polylactic acid 3D printing material, and Ty is theextrapolated initial decomposition temperature of the polylactic acid 3D printing material. It is found through research that when the structure of the polylactic acid 3D printing material satisfiesthe following relation: 0 DEG C<=Tx-Ty<=60 DEG C, and when the wire drawing extrusion speed of the polylactic acid 3D printing material is 45 Kg / h, and the diameter of the extruded wire is 1.75 cm, the wire diameter range is no more than 0.12 cm, and the relative deviation of the wire diameter is less than 5%. Therefore, the wire extrusion stability is well developed.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polylactic acid 3D printing material and a wire prepared therefrom. Background technique [0002] Starch-rich corn can produce a colorless and transparent liquid - lactic acid through modern biotechnology, and then through a special polymerization process to produce a granular polymer material - polylactic acid (PLA). PLA has the best tensile strength and elongation, and can be produced by various common processing methods, such as: melt extrusion molding, injection molding, blown film molding, foam molding and vacuum forming, etc. In addition, due to the good biodegradability of PLA, PLA plastics can be used in 3D printing materials, but at this stage, the promotion and application of PLA as a general-purpose plastic, especially the base material of 3D printing consumables, is still subject to certain restrictions. Mainly due to the severe brittleness of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L83/04C08K5/20B33Y70/00
CPCC08K5/20C08L67/04B33Y70/10C08L83/04
Inventor 熊凯袁志敏蔡彤旻黄险波曾祥斌焦建卢昌利杨晖麦开锦董学腾
Owner KINGFA SCI & TECH CO LTD
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