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Polylactic acid material for 3D printing of thoracoabdominal fixing band and preparation method of polylactic acid material

A polylactic acid material, 3D printing technology, applied in the direction of additive processing, etc., can solve the problems of inapplicable 3D printing chest and abdomen fixing belt, no obvious improvement of PLA heat resistance and impact strength, and adverse effects on the performance of the final product. Achieve the effects of reducing interface effects, smooth printing process and beautiful appearance

Inactive Publication Date: 2016-10-05
HEILONGJIANG XINDA ENTERPRISE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 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. Although this method can strengthen the polylactic acid Toughness, but no significant improvement in heat resistance and impact strength of PLA
Unavoidable adverse effects on the performance of the final product
[0009] Although the above research has improved some properties of polylactic acid, it also has corresponding disadvantages and is not suitable for 3D printing chest and abdomen fixation belts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of the modified polylactic acid composite material applicable to 3D printing adopts the following steps:

[0030] (1) 80 parts (weight ratio, the same below) of polylactic acid, 15 parts of POE 7256, 5 parts of POE2g2MAH.

[0031] (2) Weigh each material according to the ratio in (1), mix in a high-speed mixer for 5 minutes, set the temperature of the high-speed mixer to 40 ℃, and set the speed to 2500r / min to obtain a premix, and place the premix in an oven and dried at 50°C for 3 hours.

[0032] (3) Place the dried premix obtained in (2) in a twin-screw extruder for extrusion and drawing. The temperature of the twin-screw extruder is set as follows: 180°C, 180°C, 185°C, 185°C, 190°C °C, 190 °C, 195 °C, 195 °C, die temperature 200 °C, screw rotation speed 250 r / min, feeding speed 20 r / min.

[0033] (4) The polylactic acid wire obtained in (3) is 3D printed to make a chest and abdomen fixing belt. The printing process is smooth, and the surface ...

Embodiment 2

[0035] The preparation method of the modified polylactic acid composite material applicable to 3D printing adopts the following steps:

[0036] (1) 87 parts (weight ratio, the same below) of polylactic acid, 8 parts of POE 8999, and 5 parts of NAX50.

[0037] (2) Weigh each material according to the ratio in (1), mix in a high-speed mixer for 3 minutes, set the temperature of the high-speed mixer to 50 ℃, and set the speed to 3000r / min to obtain a premix, and place the premix in an oven and dried at 50°C for 3 hours.

[0038] (3) Place the dried premix obtained in (2) in a twin-screw extruder for extrusion and drawing. The temperature of the twin-screw extruder is set as follows: 170°C, 175°C, 175°C, 180°C, 180°C °C, 180 °C, 180 °C, 180 °C, die head temperature 185 °C, screw rotation speed 150 r / min, feeding speed 10 r / min.

[0039] (4) The polylactic acid wire obtained in (3) is 3D printed to make a chest and abdomen fixing belt. The printing process is smooth, and the surf...

Embodiment 3

[0041] The preparation method of the modified polylactic acid composite material applicable to 3D printing adopts the following steps:

[0042] (1) 87 parts (weight ratio, the same below) of polylactic acid, 5 parts of POE 8003, 5 parts of POE 8100, and 3 parts of NAX00.

[0043] (2) Weigh each material according to the ratio in (1), mix in a high-speed mixer for 5 minutes, set the temperature of the high-speed mixer to 40 ℃, and set the speed to 2500r / min to obtain a premix, and place the premix in an oven and dried at 50°C for 3 hours.

[0044](3) Place the dried premix obtained in (2) in a twin-screw extruder for extrusion and drawing. The temperature of the twin-screw extruder is set as follows: 170°C, 175°C, 175°C, 180°C, 180°C °C, 180 °C, 180 °C, 180 °C, die head temperature 185 °C, screw rotation speed 150 r / min, feeding speed 10 r / min.

[0045] (4) The polylactic acid wire obtained in (3) is 3D printed to make a chest and abdomen fixing belt. The printing process is ...

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PUM

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Abstract

The invention relates to a polylactic acid material for 3D printing of a thoracoabdominal fixing band and a preparation method of the polylactic acid material. The polylactic acid material is prepared from, by mass, 50%-98% of polylactic acid, 1%-35% of a flexibilizer and 1%-15% of a compatilizer; the raw materials are mixed by a high-speed mixer, and then the mixture is subjected to extrusion drawing by a double-screw extruder. Compared with the prior art, the prepared composite material has the advantages that the good flexibility is achieved, the impact strength and the heat resistance are greatly improved, the elongation at break is greatly increased, and the performance requirements of the thoracoabsominal fixing band can be met; by utilizing the composite material to conduct 3D printing of the thoracoabdominal fixing band, printing is smooth, and the finished product has the advantages of being smooth in surface, attractive and uniform in appearance, stable in size and the like.

Description

technical field [0001] The invention belongs to the field of polymer materials and is suitable for 3D printing materials, in particular to a polylactic acid material suitable for 3D printing chest and abdomen fixing belts and a preparation method thereof. Background technique [0002] 3D printing technology, a type of rapid prototyping technology, is a technology based on digital model files, using bondable materials such as metal or plastic, to construct objects by slicing and printing layer by layer. It has been widely developed in the fields of mold design, industrial machinery parts manufacturing, automobiles, aviation, medicine and medicine. 3D printing technology mainly includes stereolithography, laser sintering, fusion lamination, etc. Among them, fusion lamination printing (FDM) is an extremely important one, and its application range is also extremely wide. [0003] The main principle of Fused Deposition Printing Technology (FDM) is to heat the thermoplastic mater...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L23/08B29B7/28B29C47/92B33Y70/00B29C48/92
Inventor 李健成李文岩林航
Owner HEILONGJIANG XINDA ENTERPRISE GRP