A rare earth flexible magnetic strip for health care bedding and its preparation method

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...

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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.

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