Composite flexible magnetic strip and preparation method thereof

Abstract

A composite flexible magnetic strip and a preparation method thereof, comprising a rubber magnetic body, a flexible elastic layer, and a soft head; the rubber magnetic body is used as a skeleton, and the periphery of the skeleton length direction is covered with a flexible elastic layer, and the flexible elastic layer and the rubber magnetic body They are tightly combined; at both ends of the rubber magnetic body, a head is provided, and the head is tightly combined with the flexible elastic layer to form a closed state; the thickness of the flexible elastic layer is between 0.03mm and 1mm. Due to the way of composite extrusion, the flexible elastic layer and the rubber magnetic body are closely combined in structure, there is no gap between them, and air will not enter to cause rust, and the two are difficult to peel off and delaminate. Both the flexible elastic layer and the flexible elastic layer have good flexibility, and will not be deformed or creasing. The two ends of the rubber magnetic body are provided with sealing heads that are tightly combined with the flexible elastic layer to completely cover the cross section, so that the rubber magnetic body is completely isolated from the external environment, and the rubber magnetic body is better protected.

Description

technical field [0001] The invention relates to a composite flexible magnetic strip and a preparation method thereof. Background technique [0002] With the wide application of rubber magnetic bodies, flexible rare earth permanent magnets are favored because of their high magnetic properties. However, due to the coarse particles and uneven shape of the rare earth magnetic powder, the flexibility of the prepared rubber magnetic body is much lower than that of the rubber ferrite magnet. In addition, the specific surface area of ​​the rare earth magnetic powder with large particles is small, and the bonding strength with the rubber binder is average, and the phenomenon of powder falling is very easy to occur. Especially when NdFeB rare earth magnetic powder is used, it not only loses the powder seriously, but also is prone to rust. It will rust quickly in a humid environment, and then accelerate the aging of the rubber magnetic body and break. [0003] Chinese patent "ZL 2010...

AI Technical Summary

Problems solved by technology

Since the materials of the protective cover and the rubber magnetic body are not formed synchronously, the two materials are not tightly attached to each other. On the one hand, after the flexible magnetic strip is bent, the rubber magnetic body and the protective cover are bent. Small gaps will appear after folding and deformation, and irreversible creases will appear on the protective sheath after deformation, which will affect the appearance; on the other hand, air will enter the gaps at the creases, which will still oxidize the NdFeB magnetic powder after a long time slowly rust

In addition, both ends of the flexible magnetic strip are not completely closed, and the section of the

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