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Flexible Magnet

General Description Flexible magnet


Flexible magnet covers a wide variety of materials. The different categories are defined partly by the actual input magnet chemical constituents and partly by the magnet material manufacturing process. The most common constituents in flexible ferrite magnet material are Barium ferrite and Strontium ferrite, the binder choices include nitrile rubber, Nordel and Natsyn. And more recently, in flexible rare earth Neodymium Iron Boron, are available in higher energy products, all loaded into PVC binders. Most Flexible magnetic material is produced in strip or sheet by extrusion process. Higher magnetic characteristic/performance flexible material is obtained either by work rolling/hardening in the rolling process or by including special additives to the chemical constituents.

Flexible materials process a particular steady magnetic power and a smooth surface, which is a uniquely desirable combination of properties for many product designer with a lower cost, especially in flexibility and machinability, no other magnetic materials have this characteristic compared to it.

Flexible materials is soft enough to be easily bent, twisted, coiled, punched, and otherwise machined into almost any shape without losing of magnetic energy.

Manufacturing Methods

  • Extrusion:

    To produce materials in strip form (from appox.6.4mm to 254mm wide)

  • Calendering:

    To produce materials in sheet form (roll and sheet can be cut or die-cut easily. Their standard thickness is from 0.15"(0.4mm) to 0.60"(1.5mm), roll length is from 32"(10m) to 200"(60.96m)

  • Machining

    Flexible materials are relatively easy to fabricate: they may be cut, scored, punched, slit, or die cut to shape, including strip and sheet in the lower energy grades, strip and a variety of punched parts in ring, disc, and bar shapes in the higher energy grades. The dimensions and the characteristics could be changed according to your requirement.

  • Surface Treatments

    We are able to laminate a variety of decorative facings to magnetic strips, sheets and rolls with PVC (white PVC, matte white-PVC, and gloss white-PVC and color PVC, such as red, yellow, black, brown, etc.), self adhesive (standard adhesive and 3M adhesive) and UV.

    Please noted Custom laminations available, customer-supplied laminates can be applied subject to testing.

  • Magnetizing

    Low energy flexible magnets are magnetized with multi-poles (pole width 2, 4, 7mm or 12,7/6.4/3.6 poles per inch) on one surface to give greater holding force. Higher energy flexible magnets are magnetized either multiple pole, or single pole on one surface.

  • Temperature Effects

    Demagnetization linearly with temperature of flexible magnet is in the same way with ceramic magnets. However, the limiting factor is the binder materials used to render them flexible: these begin to flow at temperatures of about 250 °F.

Applications for Flexible Magnets

The Isotropy and Anisotropy Flexible magnets formed by pressing or injecting method is widely used in advertising, holding, door gaskets, signs, micro-motors, motor industry and the high-tech industry as well as CRT focusing, especially, as the best material to produce door gasket, which are widely used for magnetic door sealing in the refrigerator, ice box, kitchen cupboard and other dryer equipments.