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Flexible material suitable for 3D printed chest and abdomen fixing belt and preparation method of flexible material

A flexible material, 3D printing technology, applied in the direction of additive processing, etc., to achieve the effect of high toughness, excellent surface texture, and convenient operation

Inactive Publication Date: 2017-12-08
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 of the flexible material suitable for 3D printing thoracoabdominal fixation belt adopts the following steps:

[0028] (1) 23 parts (weight ratio, the same below) of polypropylene, 20 parts of thermoplastic polyurethane elastomer rubber TPU, 50 parts of mineral oil, 2 parts of antioxidant, 2 parts of coupling agent;

[0029] (2) Weigh each material according to the ratio in (1), and mix 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...

Embodiment 2

[0033] The preparation method of the modified polypropylene composite material suitable for 3D printing adopts the following steps:

[0034] (1) 15 parts (weight ratio, the same below) of polypropylene, 30 parts of thermoplastic polyurethane elastomer rubber TPU, 13 parts of polystyrene, 40 parts of mineral oil, 2 parts of antioxidant, 2 parts of coupling agent;

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

[0036] (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.

[0037] The obtained material has a Shore hardness (A) of 50, a tensile strength at break of 6.0 MPa, and an ultimate el...

Embodiment 3

[0039] The preparation method of the modified polypropylene composite material suitable for 3D printing adopts the following steps:

[0040] (1) 18 parts (weight ratio, the same below) of polypropylene, 30 parts of thermoplastic polyurethane elastomer rubber TPU, 35 parts of mineral oil, 2 parts of antioxidant, 2 parts of coupling agent;

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

[0042] (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.

[0043] The obtained material has a Shore hardness (A) of 70, a tensile strength at break of 8.2 MPa, and an ultimate elongation of 300%, which h...

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Abstract

The invention relates to a flexible material suitable for a 3D printed chest and abdomen fixing belt and a preparation method of the flexible material. The flexible material is prepared by the following components and raw materials in parts by weight: 10-30 parts of polypropylene, 20-40 parts of thermoplastic polyurethane (TPU) elastomer rubber, 0-50 parts of mineral oil, 0-3 parts of an antioxidant and 0-3 parts of a coupling reagent ST-5; after the raw materials are mixed by a high-speed kneading machine, extrusion and wire drawing are performed by utilizing a single screw extruder. Compared with the prior art, the flexible material prepared by the preparation method provided by the invention has low hardness, high toughness and other excellent mechanical properties, the weather resistance and the heat resistance of the material are also improved, moreover, the flexible material is excellent in performance in print fluency and material interlayer bonding 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 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 material at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L91/06C08L23/12B33Y70/00B29C47/92B29C48/92
CPCC08L91/06B29C48/92B29C2948/9259B29C2948/92704B33Y70/00C08L2201/08C08L2207/04C08L23/12C08L75/04
Inventor 周利波刘刚谢众
Owner HEILONGJIANG XINDA ENTERPRISE GRP
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