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Magnetic plastic composite material and preparation method thereof

A technology of composite materials and magnetic plastics, applied in the direction of magnetism of inorganic materials, can solve problems such as poor corrosion resistance, insufficient magnetism, and high processing costs, and achieve the effects of easy dispersion, uniform distribution, and increased strength

Active Publication Date: 2013-08-21
XIAMEN RUNNER IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Magnetic plastics on the market are mainly filled with ferrite magnetic powder. This type of magnetic powder is cheap and easy to process, but its magnetism is weak and its application range is limited.
The NdFeB magnetic powder is mainly used in sintered magnetic materials. This type of magnetic material adopts the method of powder metallurgy to mix and bond the magnetic powder and polymer materials. The product is formed by molding, and then sintered after removing the plastic component. This type of product Simple structure, poor corrosion resistance, high processing cost, low strength, not suitable for processing products with complex and fine structures
[0004] Patent application number 201210327291.6 discloses a magnetic plastic, which is composed of nano-scale magnetic powder, dispersant and plastic particles, and the maximum content of nano-scale magnetic powder is only 90%, which has insufficient magnetic properties and is not easy to form and process
It uses nano-scale magnetic powder and plastic particles to be directly mixed and then put into a twin-screw extruder for granulation. The magnetic powder and plastic particles cannot be mixed uniformly, resulting in unstable material properties and large magnetic differences, which cannot meet the requirements of precision products.

Method used

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  • Magnetic plastic composite material and preparation method thereof
  • Magnetic plastic composite material and preparation method thereof
  • Magnetic plastic composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A magnetic plastic composite material, which is made of the following components according to the mass ratio: nylon 6 powder 5%; neodymium iron boron magnetic powder 92%; caprolactam 1%; 3-aminopropyl triethoxysilane 1%; ethylene Bisstearamide 1%.

[0031] The preparation method of the magnetic plastic composite material includes the following steps:

[0032] Step 1: Weigh the NdFeB magnetic powder according to the mass ratio, add it to a high-speed mixer and stir for 60 minutes at a speed of 1000 revolutions per minute to dry the NdFeB magnetic powder and the temperature reaches 100 degrees Celsius.

[0033] Step 2: Weigh 3-aminopropyltriethoxysilane according to the mass ratio, and spray the 3-aminopropyltriethoxysilane uniformly on the stirring neodymium iron boron magnetic powder, and stir for 30 minutes at a speed of 1400 rpm; then add the weighed ethylene bis-stearamide and continue stirring for 5 minutes, and the speed is 1400 rpm.

[0034] Step 3: Heat up the caprolact...

Embodiment 2

[0039] A magnetic plastic composite material, which is made of the following components in a mass ratio: 8% nylon 6 powder; 90% neodymium iron boron magnetic powder; 1% caprolactam; 0.5% 3-aminopropyltrimethoxysilane; ethylene double Stearamide 0.5%.

[0040] The preparation method of the magnetic plastic composite material includes the following steps:

[0041] Step 1: Weigh the NdFeB magnetic powder according to the mass ratio, add it to a high-speed mixer and stir for 60 minutes at a speed of 1000 revolutions per minute to dry the NdFeB magnetic powder and the temperature reaches 100 degrees Celsius.

[0042] Step 2: Weigh 3-aminopropyltrimethoxysilane according to the mass ratio, and spray the 3-aminopropyltrimethoxysilane uniformly on the stirring neodymium iron boron magnetic powder, and stir for 30 minutes at a speed of 1400 rpm / Min, then add the weighed ethylene bisstearyl amide and continue to stir for 5 minutes, and the rotation speed is 1400 rpm;

[0043] Step 3: Heat up ...

Embodiment 3

[0048] A magnetic plastic composite material, which is made of the following components according to the mass ratio: 4% nylon 6 powder; 94% neodymium iron boron magnetic powder; 0.5% caprolactam; 0.5% 3-aminopropyltriethoxysilane; polytetrafluoroethylene Vinyl fluoride powder 1%.

[0049] The preparation method of the magnetic plastic composite material includes the following steps:

[0050] Step 1: Weigh the NdFeB magnetic powder according to the mass ratio, add it to a high-speed mixer and stir for 60 minutes at a speed of 1000 revolutions per minute to dry the NdFeB magnetic powder and the temperature reaches 100 degrees Celsius.

[0051] Step 2: Weigh 3-aminopropyltriethoxysilane according to the mass ratio, and spray the 3-aminopropyltriethoxysilane uniformly on the stirring neodymium iron boron magnetic powder, and stir for 30 minutes at a speed of 1400 rpm, then add the weighed polytetrafluoroethylene powder and continue stirring for 10 minutes, and the rotation speed is 1400...

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Abstract

The invention discloses a magnetic plastic composite material. The magnetic plastic composite material includes the following components, by mass, 4-8 % of nylon 6 powder, 90-95% of neodymium iron boron magnetic powder, 0-5% of caprolactam, 0.5-1.5% of lubricant and 0.3-1% of silane coupling agent. The invention further discloses a magnetic plastic composite material preparation method. The magnetic plastic composite material is good in strength due to the fact that content of the neodymium iron boron magnetic powder reaches 90-95%. Through fully mixing of the neodymium iron boron magnetic powder and the nylon 6 powder, the neodymium iron boron magnetic powder is even in distribution and magnetism. Therefore, the magnetic plastic composite material can be more stable in quality.

Description

Technical field [0001] The invention relates to a magnetic plastic composite material and a preparation method thereof. Background technique [0002] Magnetic plastics can be divided into two types: structural type and composite type. Among them, structural magnetic plastic refers to a magnet with strong magnetism in the polymer itself, while composite magnetic plastic refers to a mixture of plastic or rubber as a binder with magnetic powder. Magnetic plastic for magnets made of junction processing. [0003] Most of the magnetic plastics used in the prior art are of composite type, that is, a composite material is formed by blending inorganic magnetic powder and polymer plastic material, and then magnetizing the inorganic magnetic material in the composite material. The magnetic powder filled in the plastic is mainly ferrite magnetic powder and neodymium iron boron magnetic powder. Magnetic plastics on the market are mainly filled with ferrite magnetic powders, which are low in c...

Claims

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Application Information

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IPC IPC(8): H01F1/09B29C47/92B29C69/02B29C48/92
Inventor 黄贤明周东波李明仁
Owner XIAMEN RUNNER IND CORP
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