A kind of 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 the problems of insufficient magnetism, poor corrosion resistance, and high processing costs, and achieve the effects of uniform distribution, easy dispersion, and increased strength

Active Publication Date: 2016-02-24
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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  • A kind of magnetic plastic composite material and preparation method thereof
  • A kind of magnetic plastic composite material and preparation method thereof
  • A kind of magnetic plastic composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A magnetic plastic composite material, made of the following components according to the mass ratio: nylon 6 powder 5%; NdFeB magnetic powder 92%; caprolactam 1%; 3-aminopropyltriethoxysilane 1%; Bis stearamide 1%.

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

[0032] Step 1: Weigh the NdFeB magnetic powder according to the mass ratio, add it into a high-speed mixer and stir for 60 minutes at a speed of 1000 rpm, so that the NdFeB magnetic powder is dried and the temperature reaches 100 degrees Celsius.

[0033] Step 2, weigh 3-aminopropyltriethoxysilane according to the mass ratio, spray 3-aminopropyltriethoxysilane evenly onto the NdFeB magnetic powder in stirring, and stir for 30 minutes at a speed of 1400 revs / min; Add the weighed ethylene bis stearamide and continue to stir for 5 minutes, and the rotating speed is 1400 revs / min.

[0034] Step 3: heat up the caprolactam in a small reactor to 130 degrees ...

Embodiment 2

[0039] A magnetic plastic composite material, made of the following components according to the mass ratio: nylon 6 powder 8%; NdFeB magnetic powder 90%; caprolactam 1%; 3-aminopropyltrimethoxysilane 0.5%; Stearamide 0.5%.

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

[0041] Step 1: Weigh the NdFeB magnetic powder according to the mass ratio, add it into a high-speed mixer and stir for 60 minutes at a speed of 1000 rpm, so that the NdFeB magnetic powder is dried and the temperature reaches 100 degrees Celsius.

[0042] Step 2, weigh 3-aminopropyltrimethoxysilane according to the mass ratio, and evenly spray 3-aminopropyltrimethoxysilane on the stirring NdFeB magnetic powder, and stir for 30 minutes at a speed of 1400 rpm / minute, then add the weighed ethylene bis stearamide and continue to stir for 5 minutes, and the rotating speed is 1400 rpm;

[0043] Step 3: heat up caprolactam in a small reactor to 130 degree...

Embodiment 3

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

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

[0050] Step 1: Weigh the NdFeB magnetic powder according to the mass ratio, add it into a high-speed mixer and stir for 60 minutes at a speed of 1000 rpm, so that the NdFeB magnetic powder is dried and the temperature reaches 100 degrees Celsius.

[0051] Step 2, weigh 3-aminopropyltriethoxysilane according to the mass ratio, spray 3-aminopropyltriethoxysilane evenly onto the NdFeB magnetic powder in stirring, and stir for 30 minutes at a speed of 1400 rpm, then add the weighed polytetrafluoroethylene powder and continue to stir for 10 minutes, and the rotating speed is 1400 rpm;

[0052] Step 3: heat up the caprolactam in a small ...

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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 type magnetic plastic refers to the magnet with strong magnetism in the polymer itself, while composite type magnetic plastic refers to the combination of plastic or rubber as binder and magnetic powder. A magnet made of magnetic plastic knot processing. [0003] Most of the magnetic plastics used in the prior art belong to the composite type, that is, the inorganic magnetic powder and the polymer plastic material are blended to form a composite material, and then the magnetism of the inorganic magnetic material in the composite material is excited by magnetization. The magnetic powder filled into the plastic is mainly ferrite magnetic powder and NdFeB magnetic powder. Magnetic plastics on the market are mainly filled w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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