Ferrite/polyamide composite material and preparation method as well as application thereof

A composite material and polyamide technology, applied in the field of engineering plastics, can solve problems such as poor fluidity of composite materials, large loss of magnetic properties, and difficulty in injection molding processing, and achieve the effects of increased processing fluidity, low equipment requirements, and excellent mechanical properties

Inactive Publication Date: 2012-04-11
ANHUI KEJU NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large amount of ferrite added (usually the total ratio is greater than 80%), the fluidity of the composite material is too poor, resulting in difficulties in injection molding processing, excessive loss of magnetic properties, uneven

Method used

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  • Ferrite/polyamide composite material and preparation method as well as application thereof
  • Ferrite/polyamide composite material and preparation method as well as application thereof
  • Ferrite/polyamide composite material and preparation method as well as application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] see figure 1 , figure 1 Show the flowchart of the preparation method of ferrite / polyamide composite material according to the embodiment of the present invention, including the following steps:

[0027] Step S01, mixing the following parts by weight of ferrite magnetic powder, polyamide, cyclic polyester, coupling agent, antioxidant, lubricant, dispersant, dispersant and colorant to obtain the polyamide composite material body;

[0028] Step S02, extruding the ferrite / polyamide composite material precursor to obtain a polyamide composite material,

[0029]

[0030] Specifically, the ferrite, polyamide, cyclic polyester, coupling agent, antioxidant, lubricant, dispersant, coupling agent, and colorant are the same as those described above, and will not be repeated here.

[0031] Specifically, in step S01, the equipment used in the mixing step is not limited, such as kneader, kneader, internal mixer, preferably internal mixer, the mixing time is 5-20 minutes, and the...

Embodiment 1

[0038] The ferrite / polyamide composite material in the embodiment of the present invention includes the following components in parts by weight:

[0039] 80 parts by weight of ferrite magnetic powder, 12 parts by weight of PA6 resin, 6 parts by weight of cyclic polyester, 1 part by weight of KH-570, 1 part by weight of antioxidant , Lubricant, dispersant and anti-ultraviolet agent mixture.

[0040] The preparation method of the polyamide composite material of the embodiment of the present invention comprises the following steps:

[0041] a, ferrite magnetic powder with 80 parts by weight, PA6 resin with 12 parts by weight, cyclic polyester with 6 parts by weight, KH-570 with 1 parts by weight, and 1 parts by weight with The mixture of antioxidant, lubricant, dispersant and anti-ultraviolet agent is put into an internal mixer and fully mixed for 15 minutes at a mixing temperature of 230°C to obtain a polyamide composite material precursor;

[0042]b, put the polyamide composi...

Embodiment 2

[0044] The ferrite / polyamide composite material in the embodiment of the present invention includes the following components in parts by weight:

[0045] 90 parts by weight of ferrite magnetic powder, 5 parts by weight of PA6 resin, 3 parts by weight of cyclic polyester, 1 part by weight of KH-570, 1 part by weight of antioxidant , Lubricant, dispersant and anti-ultraviolet agent mixture.

[0046] The preparation method of the ferrite / polyamide composite material in the embodiment of the present invention comprises the following steps:

[0047] a, 90 parts by weight of ferrite magnetic powder, 5 parts by weight of PA6 resin, 3 parts by weight of cyclic polyester, 1 part by weight of KH-570, 1 part by weight of The mixture of antioxidant, lubricant, dispersant and anti-ultraviolet agent was put into an internal mixer and fully mixed for 18 minutes at a mixing temperature of 235°C to obtain a polyamide composite material precursor;

[0048] b, put the polyamide composite mater...

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PUM

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Abstract

The invention is suitable for the technical field of engineering plastics, and provides a ferrite/polyamide composite material and a preparation method as well as application thereof. The ferrite/polyamide composite material comprises the following components in parts by weight: 72-92 parts of ferromagnetic oxide powder, 5-17 parts of polyamide, 2-7 parts of cyclic polyester, 0.5-2 parts of coupling agent and 0.5-2 parts of mixture of antioxidant, lubricating agent, dispersing agent, coupling agent and coloring agent. The ferrite/polyamide composite material provided by the invention obviously increases the processing fluidity by the modification action of the cyclic polyester and coupling agent, and can be widely used for manufacturing injection molding products; and the products obtained by injection molding have excellent mechanical properties as well as excellent and stable magnetic properties. The preparation method provided by the invention is simple in operation, low in cost and equipment requirement and very suitable for industrialized production.

Description

technical field [0001] The invention belongs to the technical field of engineering plastics, and in particular relates to a ferrite / polyamide composite material, its preparation method and application. Background technique [0002] Magnetic devices are generally formed by sintering or bonding of magnetic powder. Among them, the bonded magnetic devices that can be injection molded have high mechanical strength, good mass production, accurate manufacturing dimensions, easy to form heterogeneous parts, and can be recycled. Advantages have been developed rapidly in recent years. [0003] The bonded ferrite magnetic particles with polyamide as the carrier combine the advantages of high cost performance of ferrite and the ease of processing of polyamide, occupying 90% of the injection molding magnetic market in the current market. However, due to the large amount of ferrite added (usually the total ratio is greater than 80%), the fluidity of the composite material is too poor, re...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08L67/02C08K3/22C08K5/5425B29C47/92B29C48/92
CPCB29C48/92B29C48/875B29C2948/92514B29C2948/92561B29C2948/92704B29C2948/92895
Inventor 徐东徐永杨海灵
Owner ANHUI KEJU NEW MATERIALS
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