Flexible Rubber Magnets
Isotropic & Anisotropic · Multi-Pole Sheets, Strips & Profiles
Ferrite powder bonded in rubber or plastic — the only permanent magnet you can bend, cut with scissors, and form into custom shapes. Multi-pole magnetization enables unique designs impossible with rigid magnets.
What Are Flexible Magnets?
Flexible magnets are composite materials: ferrite magnet powder (SrFe₁₂O₁₉ or BaFe₁₂O₁₉) mixed with a thermoplastic or rubber binder (NBR, CPE, PVC, or polyolefin). The mixture is calendared or extruded into sheets, strips, or profiles, then magnetized — often in multi-pole patterns (alternating N-S-N-S).
Standard Flexible
Weaker magnetically (~0.5-1.0 MGOe) but can be magnetized in any direction. Lower cost, most common type. Used for signage, promotional items, and fridge magnets.
High-Energy Flexible
Stronger (~1.0-1.7 MGOe) with preferred magnetization direction. Calendered under magnetic field for better particle alignment. Used for gaskets, seals, and motor components.
Patterned Magnetization
Alternating N-S poles on one face (2-16 poles/inch). Creates strong near-surface field but very short reach — the magnetic field drops rapidly with distance. Ideal for holding and closure applications.
Shapes, Sizes & Configurations
Flexible magnets can be produced in virtually any form factor. Here are the most common.
Magnetic Sheets
Flat sheets in standard sizes up to 610mm wide. Thickness: 0.5-5mm. Available with adhesive backing, printable surface, or laminated with vinyl/PVC.
Magnetic Strips
Continuous strips in standard widths (12.7mm, 19mm, 25.4mm, 50.8mm). Roll form up to 30m. Self-adhesive or plain. Extruded profiles with ribs, lips, or channels.
Custom Die-Cut Shapes
Any 2D shape — logos, letters, geometric patterns. Die-cut from sheet stock with steel rule dies. Minimum feature size: ~3mm. Tooling cost: low.
Profiles & Channels
Extruded profiles with magnetic particles embedded in the polymer matrix. U-channels, C-channels, T-profiles. For refrigerator gaskets, door seals, and window closures.
Flexible Magnet Product Forms
Ningbo Empire calenders and extrudes ferrite-polymer sheet, strip, and profile in six common formats — from plain magnetic base stock to print-ready and vehicle-grade laminates.
Magnetic Sheet (Plain-Mag)
Uncoated or UV-coated ferrite sheet magnetized single- or double-sided. The workhorse base material for lamination, die-cutting, and self-adhesive conversion. Bonds well to paper, films, and fabrics.
Print-Mag Laminate
Plain-Mag laminated with white/colored PVC, PET, PP, or photo paper. Corrosion-resistant and flexible, it is fully compatible with digital, screen, and solvent printing plus post-cutting.
Inkjet Magnetic Media
PVC surface optimized for UV, weak-solvent, and eco-solvent inkjet. Waterproof matte or glossy finishes in standard and custom colors. Fast drying for high-speed digital print lines.
Car Magnet
High-energy flexible magnet with a PP backing film (instead of UV coating) for anti-adhesion and outdoor weather resistance. Top surface is printed PVC or PET for durable vehicle signage.
Press-Printed Sheets
Synthetic paper face stock laminated to flexible magnet for offset, flexographic, and laser printing. Ideal for point-of-sale sheets, magnetic business cards, and retail promotions.
Desktop & Craft Sheets
Small-format, easy-to-cut sheets for office displays, refrigerator magnets, educational aids, and craft projects. Can be scored with scissors, craft knives, or steel-rule dies.
Flexible Magnet Form Comparison
Same ferrite-rubber composite core, tailored to different converting and end-use requirements. All rolls are slit and sheeted to custom sizes on request.
| Flexible Magnet Product Forms & Dimensions | |||||
|---|---|---|---|---|---|
| Product Form | Magnetic Grade | Printable / Top Surface | Total Thickness | Max Width | Typical Roll Length |
| Magnetic Sheet (Plain) | Isotropic / Semi / Anisotropic | UV coating; ready for lamination | 0.2 – 10 mm | 1,524 mm (60") | 15 / 20 / 30 m |
| Print-Mag Laminate | Isotropic / Semi / Anisotropic | White/colored PVC, PET, PP, paper, photo paper | 0.3 – 2.0 mm | 1,524 mm (60") | 15 / 20 / 30 m |
| Inkjet Media | Standard or high-performance | PVC waterproof matte / glossy | 0.35 – 1.0 mm | 600 mm – 1.52 m | Rolls |
| Car Magnet | High-performance | Printed PVC or PET + PP backing film | 0.35 – 1.0 mm | 1,000 mm | Sheets / rolls |
| Press-Printed Sheet | Standard or high-performance | High-quality synthetic paper | 0.25 – 0.5 mm | Sheets | Sheets / rolls |
| Desktop / Craft Sheet | Isotropic | Plain, printable, or adhesive | 0.4 – 1.0 mm | A4 / Letter / custom | Pads / sheets |
| All dimensions are representative. Custom widths, slit rolls, die-cut shapes, and adhesive lamination are available on request. Contact a Ningbo Empire representative to match the right grade and thickness to your converting process. | |||||
Typical Magnetic Properties
Flexible magnets are divided by orientation. Isotropic grades can be magnetized in any direction; anisotropic grades are calendered under an applied field for stronger, direction-dependent performance.
| Typical Magnetic Properties of Flexible Ferrite Sheet | |||||
|---|---|---|---|---|---|
| Grade Type | Br kG / mT | Hc kOe / kA/m | Hci kOe / kA/m | (BH)max MGOe / kJ/m³ | Max Operating Temp. |
| Isotropic | 1.4 – 1.7 (140 – 170) | 1.0 – 1.3 (80 – 104) | 1.3 – 1.7 (104 – 136) | 0.5 – 0.8 (4.0 – 6.4) | 80 – 100 °C |
| Semi-Anisotropic | 1.8 – 2.1 (180 – 210) | 1.4 – 1.7 (112 – 136) | 1.8 – 2.2 (144 – 176) | 0.8 – 1.1 (6.4 – 8.8) | 80 – 100 °C |
| Anisotropic | 2.2 – 2.5 (220 – 250) | 1.8 – 2.2 (144 – 176) | 2.4 – 3.0 (192 – 240) | 1.1 – 1.4 (8.8 – 11.2) | 100 – 120 °C |
| Values are typical ranges for bonded ferrite-rubber calendered sheet. Actual values depend on ferrite loading, binder system, calendering direction, and magnetization pattern. Samples should be tested before final specification. | |||||
Where Flexible Magnets Shine
Signage & Display
Vehicle signs, point-of-purchase displays, magnetic whiteboards, and photo holders. Printable surface compatible with UV, solvent, and latex inks.
Sealing & Gasketing
Refrigerator door gaskets, HVAC seals, and enclosure EMI/RFI shielding. Magnetic closure with integrated air/water seal.
Promotional Products
Business card magnets, calendar magnets, and custom-shaped promotional giveaways. High perceived value, low production cost.
Education & Toys
Magnetic educational aids, building toys, science kits. Safe — no sharp edges, no small detached magnets.
Specify Your Flexible Magnet Requirements
From prototype strips to million-sheet production runs. Share your application, dimensions, and volume requirements for a tailored compound recommendation and quotation.