Strong-strength 3D printing PLA material

A polylactic acid material and 3D printing technology, applied in the field of additive manufacturing, can solve the problems of uneven structure of polylactic acid, affecting product printing and unusable industrial production, etc., so as to improve the practicability and scope of application and reduce heat exposure. The effect of warping, increasing crystallization rate and crystallinity

Active Publication Date: 2016-12-21
中广核高新核材科技(苏州)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is less data on the modification of polylactic acid for FDM 3D printing.
[0006] Chinese Patent Publication No. CN103146164A discloses a polylactic acid material for rapid prototyping nanomaterial toughening and a preparation method thereof. It improved the defect of poor toughness of polylactic acid, but the addition of polyacrylate microspheres caused the inhomogeneity of the polylactic acid system structure, and the processing performance was significantly reduced, which seriously affected the printing and molding of the product.
[0007] Chinese patent application publication number CN 103665802 A discloses a PLA material modification method that can be used for 3D printing. The method is to use inorganic nanomaterials as toughening agents to toughen and modify PLA. The method grinds polylactic acid through a planetary mill. And inorganic nano-powder, although it can enhance the dispersion of the powder in polylactic acid, but the processing efficiency is extremely low, so it cannot be used in industrial production

Method used

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  • Strong-strength 3D printing PLA material
  • Strong-strength 3D printing PLA material
  • Strong-strength 3D printing PLA material

Examples

Experimental program
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Embodiment

[0035] Example: 100 parts by mass of polylactic acid, 0.01 to 5 parts by mass of a nucleating agent, 0.1 to 2 parts by mass of a water resistant agent, 0.1 to 5 parts by mass of a nucleating aid, and 0.1 to 5 parts by mass of a plasticizer, 0.1-20 parts by mass of filler and 0.1-1 part by mass of antioxidant are uniformly mixed, melt-blended, extruded and granulated at 180-205°C. Dry the polylactic acid modified material obtained above and add it to the FDM 3D printing filament extruder. The extrusion temperature is 180-210°C. Control the water temperature, extrusion volume and traction speed, and control the diameter of the filament to be 1.75±0.03mm. . Control the printing temperature of the 3D printer to 200-210°C, and the temperature of the hot bed to 30-90°C. Control the 3D printer to print Type 1B samples that meet the requirements of GB / T 1040.2-2006. The tensile strength, flexural strength and Vicat softening temperature of the material were tested according to the s...

specific Embodiment approach

[0039] The present invention will be further described below in conjunction with embodiment:

Synthetic example 1

[0040] Synthesis Example 1: Synthesis of Calcium Terephenylmalonate

[0041] Add 11.11 grams (0.05mol) of terephthalic acid (4251-21-2) and 250ml of water into a round bottom flask with a mechanical stirring bar, heat to 80°C, and stir for 30 minutes to fully dissolve it. Dissolve 3.70 grams (0.05mol) of Ca(OH)2 powder in 500ml of water, and the dissolution temperature is 100°C. Add the Ca(OH)2 aqueous solution to the terephthalic acid solution, and stir for 45 minutes until no white flocs or precipitates are formed. Suction filter the reactant, wash, dry, and pulverize to obtain calcium terephthalate. 12.01 g of the product was obtained with a yield of 92.3%.

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Abstract

The invention discloses a strong-strength 3D printing PLA material, which comprises the following components in parts by mass: 100 parts of poly-L-lactic acid resin, 1 to 20 parts of an inorganic filler, 0.01 to 5 parts of metal polycarboxylate, 0.1 to 5 parts of an amide compound, 0.1 to 5 parts of a plasticizer, 0.1 to 1 part of an antioxidant and 0.1 to 2 parts of a hydrolysis resistant agent, wherein the hydrolysis resistant agent is at least one of a polycarbodiimide compound, a monocarbodiimide compound and an acrylic copolymer with an active epoxide group; the inorganic filler is one or a mixture formed by at least two of nano silica, talc powder, a calcium sulfate whisker and mica, and the diameter of the inorganic filler is 0.05 to 10 [mu]m. According to the strong-strength 3D printing PLA material, the mechanical performance can also be improved, the tensile strength of the material reaches 63 MPa or above, the brittleness of PLA is changed, and higher pressure and wear can also be born.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, and relates to a polylactic acid material for high-strength 3D printing. Background technique [0002] Additive manufacturing technology is an emerging technology in the field of rapid prototyping. It is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. The basic principle is additive manufacturing, the technique of adding material layer by layer to generate a three-dimensional solid. FDM technology is the only professional 3D printing technology that uses production-grade thermoplastics as consumables. This process does not require lasers, and is easy to use and maintain, with low costs. At present, most desktop-level 3D printing equipment is manufactured using FDM technology. [0003] The principle of FDM technology is to use thermoplastic polymer materials to be heated and m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L79/00C08K13/02C08K5/098C08K5/20C08K5/11C08K3/34C08K5/29C08K13/04C08K7/08B33Y70/00
CPCB33Y70/00C08K2201/003C08L67/04C08L2201/08C08L2205/24C08L79/00C08K13/02C08K5/098C08K5/20C08K5/11C08K3/34C08K5/29C08K13/04C08K7/08
Inventor 杨刚
Owner 中广核高新核材科技(苏州)有限公司
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