Rare earth flexible magnetic stripe for health bedding and preparation method thereof

A flexible magnetic strip and rare earth technology, which is applied in the manufacture of inductors/transformers/magnets, permanent magnets, magnetic objects, etc., can solve the problems of unfavorable preparation of flexible bonded magnets with magnetic properties, low surface magnetic induction intensity, and difficulty in meeting the needs of health care bedding. , to achieve the effect of not easy to drop magnetic powder, strengthen anti-aging ability, and increase flexibility

Active Publication Date: 2014-04-23
HEYE HEALTH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The magnets for magnetic therapy bedding use rare earth flexible magnetic strips. The earliest plastic magnets are flexible ferrite, which can be made into magnetic plates and magnetic strips, but the surface magnetic induction is low, which is difficult to meet the needs of health-care bedding.
[0004] CN1624824A (2005-6-8) discloses a patent on a flexible bonded NdFeB magnet and its manufacturing method. It introduces that the modified rubber binder and NdFeB magnetic powder and processing aids are first introduced. The agent is mixed evenly in proportion, and then the mixed rubber material is made into a flexible bonded magnet with a certain thickness by calendering or flat pressing, but this method is not conducive to the preparation of flexible bonded magnets with excellent magnetic properties.

Method used

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  • Rare earth flexible magnetic stripe for health bedding and preparation method thereof
  • Rare earth flexible magnetic stripe for health bedding and preparation method thereof
  • Rare earth flexible magnetic stripe for health bedding and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] (1) Antirust oil treatment: Immerse 75 parts by weight of anisotropic NdFeB and NdFeN rare earth composite permanent magnet powder mixed in a mass ratio of 1:1 in 50 parts of F20-1 antirust oil produced by Suzhou Runtian Special Oil Co., Ltd. In the rust oil, then evacuate until the vacuum degree is -0.02MPa, and then carry out microwave treatment, the microwave frequency is 100MHz, and the microwave treatment time is 0.5min;

[0063] (2) Pre-magnetization and microwave granulation: Mix the rare earth composite permanent magnet powder treated with anti-rust oil with 4 parts of polyvinylidene fluoride, chlorinated polyethylene and ethylene-propylene rubber in a mass ratio of 1:1:1 to form The binder, 1 part of heat stabilizer, 0.5 part of coupling agent, and 0.2 part of antioxidant solution are mixed uniformly in a banbury mixer, and then pre-magnetized in a pulsed magnetic field, followed by microwave vacuum drying, specifically vacuumizing To vacuum degree is-0.02MPa, ...

Embodiment 2

[0070] (1) Anti-rust oil treatment: 88 parts by weight of anisotropic NdFeB and SmFeN rare earth composite permanent magnet powder mixed in a mass ratio of 1:1 were immersed in 150 parts of F20-1 anti-rust oil produced by Suzhou Runtian Special Oil Co., Ltd. In the rust oil, then vacuumize until the vacuum degree is -0.001MPa, and then carry out microwave treatment, the microwave frequency is 350MHz, and the microwave treatment time is 2min;

[0071] (2) Pre-magnetization and microwave granulation: the rare earth composite permanent magnet powder treated with anti-rust oil and 15 parts of ethylene-propylene rubber, 5 parts of heat stabilizer, 2 parts of coupling agent, and 0.8 parts of antioxidant solution are mixed together Mix evenly in the machine, then pre-magnetize in a pulsed magnetic field, then carry out microwave vacuum drying, specifically vacuumize to a vacuum degree of -0.001MPa, and then carry out microwave treatment, the microwave frequency is 350MHz, and the micr...

Embodiment 3

[0076] (1) Anti-rust oil treatment: immerse 80 parts by weight of anisotropic NdFeB, NdFeN and SmFeN rare earth composite permanent magnet powder mixed in a mass ratio of 1:1 in 100 parts of KG-1 type quick-drying long-term anti-rust oil , and then evacuate to a vacuum degree of -0.01MPa, and then carry out microwave treatment, the microwave frequency is 200MHz, and the microwave treatment time is 1min;

[0077] (2) Pre-magnetization and microwave granulation: mix the rare earth composite permanent magnet powder treated with anti-rust oil with 10 parts of chlorinated polyethylene, 4 parts of heat stabilizer, 1 part of coupling agent, and 0.5 part of antioxidant solution in a dense Mix evenly in the mill, then pre-magnetize in a pulsed magnetic field, and then carry out microwave vacuum drying, specifically vacuumize to a vacuum degree of -0.008MPa, and then carry out microwave treatment, the microwave frequency is 250MHz, and the microwave treatment time is 1min. Agglomerated ...

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Abstract

The invention relates to the field of magnetic materials, in particular to a rare earth flexible magnetic stripe for health bedding and a preparation method thereof. The rare earth flexible magnetic stripe for health bedding comprises the following components in parts by weight of 75-88 rare earth composite permanent magnet powder, 4-15 binder, 1-5 heat stabilizer, 0.5-2 coupling agent and 0.2-0.8 antioxidant, wherein the rare earth composite permanent magnetic powder comprises two or three of anisotropic NdFeB, NdFeN or SmFeN. The rare earth composite permanent magnetic powder is obtained through the microwave vacuum treatment with rust-preventative oil in the steps of dipping the rare earth composite permanent magnetic powder into 50-150 parts by weight of rust-preventative oil, vacuumizing to the vacuum degree of -0.02MPa to -0.001MPa, and performing microwave processing at the microwave frequency of 100MHz to 350MHz for 0.5 to 2 minutes. The preparation method comprises the treatment with rust-preventative oil, pre-magnetizing and microwave granulation, a first rolling, magnetic field orientation and a second rolling. The magnetic stripe prepared through the rare earth flexible magnetic stripe for health bedding and the preparation method thereof is good in magnetic performance and aging resistance and has improved corrosion resistance.

Description

technical field [0001] The invention relates to the field of magnetic materials, in particular to a rare earth flexible magnetic strip for health care bedding and a preparation method thereof. Background technique [0002] Magnetic strips are essentially permanent magnetic materials, and there are mainly two types: bonded flexible ferrite permanent magnet materials and bonded flexible rare earth permanent magnet materials, which are made by calendering. It is also possible to mix two kinds of magnetic powder. Usually we call them rubber magnets, plastic magnets, and plastic magnets. [0003] The magnets for magnetic therapy bedding use rare earth flexible magnetic strips. The earliest plastic magnets are flexible ferrite, which can be made into magnetic plates and magnetic strips. However, the surface magnetic induction is low and it is difficult to meet the needs of health-care bedding. [0004] CN1624824A (2005-6-8) discloses a patent on a flexible bonded NdFeB magnet an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F7/02H01F1/057H01F1/08H01F41/02
Inventor 李俊方志财胡立江蔡京昊
Owner HEYE HEALTH TECH CO LTD
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