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Flexible material suitable for 3D printing and preparation method thereof

A flexible material, 3D printing technology, applied in the field of flexible materials and their preparation, to achieve the effect of excellent surface texture, excellent mechanical properties, and simple process

Inactive Publication Date: 2017-01-11
HEILONGJIANG XINDA ENTERPRISE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the consumables used in 3D printing are basically hard consumables, but many flexible materials are needed in industry and life, such as tire models, such as ABS and PLA, which cannot meet the requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method that is applicable to the flexible material of 3D printing, adopts the following steps:

[0028] (1) 23 parts (weight ratio, the same below) of polypropylene, 20 parts of thermoplastic elastomer SEBS, 5 parts of polystyrene, 50 parts of mineral oil, 2 antioxidants

[0029] (2) Weigh each material according to the ratio in (1), and mix it in a high-speed kneader for 1-10 minutes to obtain a premix;

[0030] (3) Put the premix obtained in (2) into a twin-screw extruder for extrusion and drawing. The temperature of the twin-screw extruder is set as follows: 190-230°C, 190-230°C, 190-230°C, 190°C -230°C, 190-230°C, 190-230°C, 190-230°C, die head temperature 190-230°C, screw aspect ratio greater than 32, screw rotation speed 150-180r / min, feeding speed 10- 15r / min.

[0031] The obtained material has a Shore hardness (A) of 30, a tensile strength at break of 2 MPa, and an ultimate elongation of 300%. It has good 3D printing fluency and interlayer adhe...

Embodiment 2

[0033] The preparation method of the modified polylactic acid composite material applicable to 3D printing adopts the following steps:

[0034] (1) 15 parts (weight ratio, the same below) of polypropylene, 30 parts of thermoplastic elastomer SEBS, 13 parts of polystyrene, 40 parts of mineral oil, 2 antioxidants

[0035] (2) Weigh each material according to the ratio in (1), and mix it in a high-speed kneader for 1-10 minutes to obtain a premix;

[0036] (3) Place the premix obtained in (2) in a twin-screw extruder for extrusion and drawing. The temperature of the twin-screw extruder is set as follows: 190-230°C, 190-230°C, 190-230°C, 190°C -230°C, 190-230°C, 190-230°C, 190-230°C, die head temperature 190-230°C, screw aspect ratio greater than 32, screw rotation speed 150-180r / min, feeding speed 10- 15r / min.

[0037] The obtained material has a Shore hardness (A) of 50, a tensile strength at break of 6.0 MPa, and an ultimate elongation of 300%. It has good 3D printing fluency...

Embodiment 3

[0039] The preparation method of the modified polylactic acid composite material applicable to 3D printing adopts the following steps:

[0040] (1) 18 parts (weight ratio, the same below) of polypropylene, 30 parts of thermoplastic elastomer SEBS, 15 parts of polystyrene, 35 parts of mineral oil, 2 antioxidants

[0041] (2) Weigh each material according to the ratio in (1), and mix it in a high-speed kneader for 1-10 minutes to obtain a premix;

[0042] (3) Place the premix obtained in (2) in a twin-screw extruder for extrusion and drawing. The temperature of the twin-screw extruder is set as follows: 190-230°C, 190-230°C, 190-230°C, 190°C -230°C, 190-230°C, 190-230°C, 190-230°C, die head temperature 190-230°C, screw aspect ratio greater than 32, screw rotation speed 150-180r / min, feeding speed 10- 15r / min.

[0043] The obtained material has a Shore hardness (A) of 70, a tensile strength at break of 8, and an ultimate elongation of 300%, which has good 3D printing fluency an...

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Abstract

The present invention relates to a flexible material suitable for 3D printing and a preparation method thereof, the flexible material is prepared from the following raw materials by mass: 10-30 parts of polypropylene, 20-40 parts of thermoplastic elastomer SEBS, 0-20 parts of polystyrene, 0-50 parts of parts of and 0-3 parts of an antioxidant by mixing the raw materials with a high speed mixer and extruding and drawing by a twin-screw extruder. Compared with the prior art, the prepared material has low hardness and excellent mechanical properties, the weatherability and the heat resistance of the material are improved, meanwhile the flexible material shows excellent printing fluency and material layer adhesion property.

Description

technical field [0001] The invention belongs to the field of polymer materials and is suitable for 3D printing materials, in particular to a flexible 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 also extremely wide. [0003] The main principle of Fused Deposition Printing Technology (FDM) is to heat the thermoplastic material at a temperature slightly higher t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L91/00C08L23/12C08L53/02C08L25/06B29C47/92B29C48/92
Inventor 李健成李文岩林航
Owner HEILONGJIANG XINDA ENTERPRISE GRP
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