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Flexible plastic magnetic diaphragm material with regenerated plastics

A technology of recycled plastics and magnetic films, applied to the magnetism and coating of organic materials/organic magnetic materials, can solve the problems of difficulty in using recycled materials, water and soil pollution, waste of petrochemical resources, etc., and achieve industrial automation production , The processing method is simple and the effect of a wide range of applications

Active Publication Date: 2013-10-02
GUANGZHOU MAGNET ELECTRICITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flexible rubber magnetic materials using EPDM and NBR as binders have poor temperature resistance and poor dimensional stability, and need to be vulcanized to meet the use requirements; after EPDM and NBR are vulcanized, the material itself cannot be reused
The breaking strength of the material itself is low, and it is easy to break during calendering. It is difficult to achieve a product thickness of less than 0.30mm and a width of more than 1200mm at the same time; flexible rubber magnetic materials using CPE as a binder contain halogens (mainly fluorine, chlorine, etc.) , bromine), not environmentally friendly, direct incineration or landfill after disposal will pollute water sources and soil
Therefore, the disadvantages of traditional flexible rubber magnetic materials are: 1) it is difficult to use recycled materials as binders, 2) it is difficult to reuse side materials, 3) waste a lot of petrochemical resources, 4) pollute the environment
[0005] Chinese patent application 02134329.2 discloses "a permanent magnet oxide bonded rubber magnet and its manufacturing process". The process uses internal mixer mixing and calender calendering to produce magnetic rubber material products. The thickness of the magnet is 1-2mm, and it needs to be irradiated and vulcanized to meet the use requirements; the scraps and products after vulcanization cannot be recycled, resulting in a large waste of petroleum resources

Method used

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  • Flexible plastic magnetic diaphragm material with regenerated plastics
  • Flexible plastic magnetic diaphragm material with regenerated plastics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The raw material ratio is as follows

[0028] Iron powder 76.2%

[0029] Thermoplastics with added recycled plastic 23.5%

[0030] Auxiliary 0.3%.

[0031] The iron powder is iron oxide, the thermoplastic plastic added with recycled plastic is a mixture of polypropylene (PP) and recycled PP material in a ratio of 5:1, and the additives include antioxidant 1010 and antioxidant 168 , Lubricant stearic acid.

[0032] Step A: The raw materials are prepared into a mixture according to the above mass ratio.

[0033] Step B: Enter the mixture in step A from the feeding port of the extruder between the barrel and the screw of the extruder. The mixture is initially heated in the screw conveying section of the extruder, and at the same time conveyed to the compression section. After reaching the compression section, the mixture The temperature of the plastic and additives in the tank increases further and begins to melt, gradually forming a gelatinous mixture, which is convey...

Embodiment 2

[0036] The raw material ratio is as follows

[0037] Magnetic powder 81%

[0038] Thermoplastics with added recycled plastic 18.6%

[0039] Auxiliary 0.4%.

[0040] The anisotropic magnetic powder is strontium ferrite magnetic powder, the thermoplastic plastic added with recycled plastic is a mixture of polypropylene (PP) and recycled PP material in a ratio of 5:1, and the additives include antioxidant 1010 and antioxidant Oxygen 168, lubricant stearic acid, ultraviolet absorber.

[0041] Step A: The raw materials are prepared into a mixture according to the above mass ratio.

[0042] Step B: Add the mixture described in step A into the mixing device, under the double action of heating and pressure, the mixture is melted and plasticized, and then cooled to obtain a block material, and the block mixture is broken to obtain a tablet shape, powder billet. The temperature of the mixing device is controlled at 80°C to 230°C.

[0043] Step C: Add the pellets prepared in step B i...

Embodiment 3

[0045] The raw material ratio is as follows:

[0046] Magnetic powder 79%

[0047] Thermoplastics with added recycled plastic 20.4%

[0048] Auxiliary 0.6%

[0049] The isotropic magnetic powder is strontium ferrite magnetic powder, the thermoplastic plastic added with recycled plastic is a mixture of polypropylene (PP) and recycled PP material in a ratio of 4:1, and the additives include antioxidant 1010 and antioxidant Oxygen 168, lubricant stearic acid.

[0050] Step A: The raw materials are prepared into a mixture according to the above mass ratio.

[0051] Step B: Enter the mixture from the feeding port of the extruder between the barrel and the screw of the extruder, the mixture is initially heated in the screw conveying section of the extruder, and simultaneously conveyed to the compression section, and after reaching the compression section, the mixture is The temperature of the plastic and additives rises further and begins to melt, gradually forming a gelatinous ...

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Abstract

The invention provides a flexible plastic magnetic diaphragm material with regenerated plastics, which is prepared from the following raw material components in percentage by weight: 72 to 85 percent of magnetic powder, 0 to 28 percent of regenerated plastics, 0 to 28 percent of thermoplastic plastics and 0 to 3 percent of assistant. The method for preparing the flexible plastic magnetic diaphragm material comprises: mixing the magnetic powder, the regenerated plastic, the thermoplastic plastics and the assistant in a ratio; extruding the mixture in an extruder to cast a film; and cooling and setting film by two rolls or a plurality of rolls to obtain the product. In the invention, the repeated use of the regenerated plastics in the plastic magnetic material is realized, oil resource is saved and carbon emission is reduced; meanwhile, the flexible plastic magnetic diaphragm material which is thinner and wider than rubber magnetic material can be prepared.

Description

technical field [0001] The invention relates to magnetic materials, more specifically, to a flexible plastic magnetic diaphragm material added with recycled plastics. Background technique [0002] The current annual global output of traditional rubber and plastic magnetic materials reaches 60,000 to 90,000 tons, which are widely used in exhibitions, gifts, toys, stationery, and industrial products. The binder used therein is divided into two categories: one is a plastic magnetic material with plastic as a binder, and the other is a rubber magnetic material with an elastomer or rubber as a binder. [0003] Traditional plastic magnetic material products are not flexible. The so-called flexibility refers to the material winding around a certain diameter (such as ) round bar with no obvious cracks on the surface. The traditional plastic magnetic material preparation method using plastic as a binder is: mixing magnetic powder with thermoplastics (such as PA, PPS) and thermopl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/42B29C47/92B29C41/52B29C41/24B29C48/92
CPCB29C48/9155B29C48/08B29C48/906B29C48/914
Inventor 吴国明吴隆章王学钊叶荣根苏畅汪小明
Owner GUANGZHOU MAGNET ELECTRICITY
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