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Thermoplastic polyurethane modified composite material for fdm 3D printing and preparation method thereof

A technology of thermoplastic polyurethane and composite materials, which is applied in the field of polymer materials, can solve the problems of heat resistance, hydrolysis resistance, oxidation resistance, and poor processing and forming properties, and achieve smooth printing process, good oil resistance, and good elasticity.

Active Publication Date: 2019-04-30
SHANGHAI RES INST OF MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a kind of environment-friendly, non-toxic and tasteless, which overcomes the problems of heat resistance, hydrolysis resistance, oxidation resistance and poor processability in view of the defects existing in the current thermoplastic polyurethane elastomer. Thermoplastic polyurethane modified composite material for FDM 3D printing and preparation method thereof

Method used

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  • Thermoplastic polyurethane modified composite material for fdm 3D printing and preparation method thereof
  • Thermoplastic polyurethane modified composite material for fdm 3D printing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of thermoplastic polyurethane modified composite material, comprising the following steps:

[0030] (1) Take 70 parts (weight ratio, the same below) of TPU, 5 parts of 2,6-di-tert-butyl-4-methylphenol, 5 parts of polycarbodiimide, 5 parts of maleic anhydride, 5 parts of stearin Amide, 10 parts silica. The components were dried in a dehumidifier at 70°C for 4 hours.

[0031] (2) Place the dried raw material components in a high-speed mixer and mix to obtain a premix.

[0032] (3) Place the premix obtained in step (2) in a single-screw extruder for extrusion and drawing. The temperature of each section of the single-screw extruder is set to: 180, 185, 195, 190°C, and the speed is 5r / min , to obtain a TPU-based modified composite material filament suitable for FDM 3D printers.

[0033] The wire diameter is 1.75mm and the tolerance is ±0.03mm. The tensile strength is 54MPa (test standard GB7124-1986, the same below), the elongation at break is 510% ...

Embodiment 2

[0035] A preparation method of thermoplastic polyurethane modified composite material, comprising the following steps:

[0036] (1) Take 80 parts (weight ratio, the same below) of TPU, 4 parts of 2,6-di-tert-butyl-4-methylphenol, 3 parts of 4-tert-butylcatechol, 3 parts of maleic anhydride, 2 parts Methyl stearate, 8 parts silica. The components were dried in a dehumidifier at 75°C for 3.5 hours.

[0037] (2) Place the dried raw material components in a high-speed mixer and mix to obtain a premix.

[0038] (3) Place the premix obtained in step (2) in a single-screw extruder for extrusion and drawing. The temperature of each section of the single-screw extruder is set to: 180, 190, 200, 205°C, and the speed is 8r / min , to obtain a TPU-based modified composite material filament suitable for FDM 3D printers.

[0039] The wire diameter is 1.75mm and the tolerance is ±0.03mm. The tensile strength is 51MPa, the elongation at break is 530%, and the abrasion is 29mm 3 . Use it f...

Embodiment 3

[0041] A preparation method of thermoplastic polyurethane modified composite material, comprising the following steps:

[0042] (1) Take 90 parts (weight ratio, the same below) of TPU, 3 parts of 3,5-di-tert-butyl-4-hydroxyphenylpropionate octadecyl, 2 parts of azodicarboxylate, 2 parts of maleic anhydride , 1 part of ethylene bishard amide, 2 parts of titanium dioxide. The components were dried in a dehumidifier at 80°C for 3 hours.

[0043] (2) Place the dried raw material components in a high-speed mixer and mix to obtain a premix.

[0044] (3) Place the premix obtained in step (2) in a single-screw extruder for extrusion and wire drawing. The temperature of each section of the single-screw extruder is set to: 180, 195, 200, 205°C, and the speed is 10r / min , to obtain a TPU-based modified composite material filament suitable for FDM 3D printers.

[0045] The wire diameter is 1.75mm and the tolerance is ±0.03mm. The tensile strength is 47MPa, the elongation at break is 5...

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Abstract

The invention relates to a thermoplastic polyurethane modified composite material for FDM (frequency division multiplexing) 3D printing and a preparation method thereof. The composite material is prepared from the following components in parts by weight: 70-95 parts of thermoplastic polyurethane, 1-5 parts of antioxidant, 1-5 parts of hydrolysis-resistant stabilizer, 1-5 parts of compatilizer, 1-5 parts of lubricant and 1-10 parts of other assistant. Compared with the prior art, the antioxidant, hydrolysis-resistant stabilizer, lubricant and other assistants are added, so that the modified composite material has the advantages of favorable mechanical properties, high elasticity, favorable wear resistance, higher heat stability, hydrolysis resistance, higher oxidation resistance and higher processability. When being used for FDM 3D printing, the thermoplastic polyurethane modified composite material has the characteristics of smooth printing process, no odor, smooth printing product surface, beautiful appearance, stable size, low tendency to shrinkage, favorable mechanical properties, high flexibility, high heat stability, high hydrolysis resistance, high oxidation resistance and high processability.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a thermoplastic polyurethane modified composite material for FDM 3D printing and a preparation method thereof. Background technique [0002] 3D printing is a kind of rapid prototyping technology. It is a rapid prototyping technology based on digital model files and using adhesive properties such as engineering plastics or metal powders to construct objects by layer-by-layer printing. 3D printing is a new type of processing technology. Different from the traditional "subtractive manufacturing" mechanical processing method, it adopts an innovative processing method of "material accumulation" layer by layer, which can quickly and accurately convert 3D model drawings into 3D entities. This technology can simplify the product manufacturing process, shorten the product development cycle, improve manufacturing efficiency and reduce costs. It has been widely used in aerospace...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/06C08L75/08C08L79/00C08K13/02C08K5/13C08K5/1539C08K5/20C08K3/36C08K5/101C08K5/134C08K5/23C08K3/22C08K5/098B29C48/92
Inventor 张云波乔雯钰张鑫鑫顾哲明李振
Owner SHANGHAI RES INST OF MATERIALS CO LTD
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