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Modified polylactic acid composite material suitable for 3D printing and preparation method of composite material

A composite material and 3D printing technology, which is applied in the field of modified polylactic acid composite material and its preparation, can solve the problems of no obvious improvement of PLA heat resistance and impact strength, and adverse effects on the performance of the final product, so as to achieve a smooth and smooth printing process , beautiful appearance and low production cost

Inactive Publication Date: 2014-12-03
SHANGHAI RES INST OF MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

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 suitable for 3D printing adopts the following steps:

[0030] (1) 82 parts (by weight, the same below) of polylactic acid, 8 parts of polycaprolactone, 2 parts of wood flour, 3 parts of oleamide, 2 parts of pyromellitic anhydride, and 3 parts of dicumyl peroxide.

[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°C, and set the speed to 2500r / min to obtain a premix, and place the premix in an oven , dried at 50°C for 4 hours.

[0032] (3) Place the dried premix obtained in (2) in a single-screw extruder for extrusion and wire drawing. The screw rotation speed of the single-screw extruder is 7r / min, and the frequency of the tractor is 20Hz to obtain a modified Polylactic acid wire.

[0033] (4) The polylactic acid filament obtained in (3) was subjected to a 3D printing test. The printing proces...

Embodiment 2

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

[0036] (1) 82 parts (weight ratio, the same below) of polylactic acid, 8 parts of polysuccinic acid / butylene adipate, 2 parts of mica, 3 parts of ethylene bisoleamide, 2 parts of phthalate anhydride, 3 parts benzoic acid peroxide.

[0037] (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°C, and set the speed to 2500r / min to obtain a premix, and place the premix in an oven , dried at 50°C for 4 hours.

[0038] (3) Place the dried premix obtained in (2) in a single-screw extruder for extrusion and wire drawing. The screw rotation speed of the single-screw extruder is 7r / min, and the frequency of the tractor is 20Hz to obtain a modified Polylactic acid wire.

[0039] (4) The polylactic acid filament obtained in (3) was subjected to a 3D printing te...

Embodiment 3

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

[0042] (1) 85 parts (weight ratio, the same below) of polylactic acid, 8 parts of polyadipate / butylene terephthalate, 2 parts of kaolin, 2 parts of stearamide, 1 part of pyromellitic anhydride, 2 parts dicumyl peroxide.

[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°C, and set the speed to 3000r / min to obtain a premix, and place the premix in an oven , dried at 50°C for 4 hours.

[0044] (3) Place the dried premix obtained in (2) in a single-screw extruder for extrusion and wire drawing. The screw rotation speed of the single-screw extruder is 8r / min, and the tractor frequency is 25Hz to obtain a modified Polylactic acid wire.

[0045] (4) The polylactic acid filament obtained in (3) was subjected to a 3D printing test. The printing pr...

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Abstract

The invention relates to a modified polylactic acid composite material suitable for 3D printing and a preparation method of the composite material. The modified polylactic acid composite material suitable for 3D printing is prepared from the following raw materials in percentage by weight: 80-90% of polylactic acid, 6-10% of a flexibilizer, 1-2% of a nucleating agent, 1-3% of a dispersing agent, 1-2% of a chain extender and 1-3% of a compatilizer. The preparation method of the modified polylactic acid composite material suitable for 3D printing comprises the following steps: mixing the raw materials by virtue of a high-speed mixer, and extruding and drawing by using a single-screw extruder. Compared with the prior art, the composite material prepared by the method is good in flexibility; meanwhile, the impact strength, the heat resistance and the breakage elongation can be greatly improved; the printing is smooth when the composite material is used for 3D printing; the finished product has the advantages of smooth surface, beautiful and shapely appearance and stable size.

Description

technical field [0001] The invention belongs to the field of polymer materials and is suitable for 3D printing materials, in particular to a modified polylactic acid composite material suitable for 3D printing 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 extremely wide. [0003] The main principle of Fused Deposition Printing Technology (FDM) is to heat the thermoplastic material at a temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L97/02C08L67/02C08L71/08C08K13/02C08K5/20C08K5/14C08K5/1539C08K3/34B29B7/02
Inventor 鄢国强张云波乔雯钰张鑫鑫顾哲明
Owner SHANGHAI RES INST OF MATERIALS CO LTD
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