Inspection Plan Agreement
Specify critical characteristics, sampling and acceptance criteria so the requested records match your part and application.
Plan the quality reviewFlexible Magnetic Materials
Rubber-bonded ferrite magnets combine moderate magnetic properties with the flexibility of polymer. Cut with scissors, punch with dies, and laminate with adhesives or vinyl — the most versatile magnet format.
Product Range
Flexible Magnets — Product Gallery
Product forms, uses and selection considerations. Final specifications are agreed for each project.
Flexible Sheet
Material for removable signs and converted parts.
Magnetic Roll
Roll stock for cutting and lamination.
Magnetic Strip
Continuous strip for closures and identification.
Die-Cut Parts
Defined outline, thickness and adhesive requirements.
Match the Sheet, Surface & Environment
Sheet stock, strip and die-cut parts need a defined thickness and contact surface. State whether the finished face is bare, printable, vinyl-laminated or adhesive-backed.
Holding performance depends on the mating surface and magnetic pattern. Include pole pitch, cut outline, backing specification and roll or flat-part delivery in the enquiry.
Review formats and magnetic properties- Bend radius, thickness and dimensional acceptance
- Peel/adhesion requirements and surface compatibility
- UV, humidity, salt exposure and thermal cycling
Choose the Material and the Format
Specify sheet or strip format, thickness, magnetization and the intended contact surface.
SELECTION GUIDEApplication selection notesExplore applications and requirements
Why Flexible Magnets?
When your application needs a magnet that conforms to a surface, cuts to shape on-site, or costs almost nothing per unit area.
- ✓Truly flexible — bends to radii down to 10mm without cracking — conforms to curved and uneven surfaces
- ✓Easy to process — cut with scissors, die-cut, slit, punched, or laminated — no special tools required
- ✓Low cost — isotropic sheet is the cheapest magnet product by area
- ✓Available with adhesive — pressure-sensitive acrylic adhesive on one face, with release liner
Applications
| Application | Typical Spec | Why This Material |
|---|---|---|
| Signage & Displays | Isotropic 0.5–0.85mm sheet | Printable, cuttable, replaceable — the standard for point-of-purchase |
| Door Gaskets & Seals | Extruded profile with PP insert | Refrigerator and shower door sealing with reliable closure |
| Reed Switch / Sensor Targets | Anisotropic 1.0–1.5mm | Magnetize into multi-pole patterns for proximity sensing |
| Toys & Educational | Isotropic sheet | Safe, inexpensive, colorful printable surface |
| Motors | Anisotropic rolled ring | Small BLDC motors using rolled flexible magnet rings |
Isotropic vs Anisotropic Flexible
The magnetic orientation of the ferrite powder determines strength and cost:
- ✓Isotropic — random powder orientation — lower energy product but can be multi-pole magnetized and costs less; the standard for signage
- ✓Anisotropic — powder aligned during calendering — 2× stronger, must be magnetized through thickness; used in sensors and motors
- ✓Multi-pole patterns — 3, 5, 7 poles per inch standard for isotropic — strong holding force at short air gaps
Processing & Finishing
Flexible magnets ship in formats ready for your production line:
- ✓Standard formats — sheets 620×1000mm or rolls 10–60m × 100–620mm wide
- ✓Laminations — white or colored PVC, adhesive (acrylic PSA), or plain ferrite face
- Die-cutting — die-cut or kiss-cut parts on roll or sheet for automated assembly; sheet supply is also available.
- ✓Temperature limit — the polymer binder (not the ferrite) limits operation to 80–100°C — beyond that, use rigid ferrite
- ✓Strip & extruded profiles — fridge-door style extrusions, custom sections
- ✓Printed — litho or screen printing for promotional and labeling use
Grades & Technical Data
Use this single reference for grade properties, application notes and available datasheets. Confirm the selected specification with engineering before ordering.
Application Selection Notes
| Type | Typical application |
|---|---|
| Isotropic Sheet | Signage, general |
| Anisotropic Sheet | Sensors, motors |
| Extruded Profile | Gaskets, seals |
| Magnetic Strip | Labels, retail |
Product Forms & Dimensions
| 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. | |||||
Flexible Ferrite Magnetic Properties
| 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. | |||||
Select the delivery form first, then confirm magnetic orientation, backing or adhesive, finished thickness and conversion requirements. Sheet magnetic properties are not finished-part holding-force guarantees.
Frequently Asked Questions
How strong are flexible magnets?
Isotropic flexible sheet has about 10% of ferrite's energy product and 1% of NdFeB's. For holding force: a 0.75mm isotropic multi-pole sheet holds roughly 20–40 g/cm² against steel. It's strong enough for signage and light holding, but not for structural or mechanical applications.
Can flexible magnets be printed on?
Yes — laminate white PVC or printable vinyl on the magnet face, then print with UV, screen, or digital methods. We supply laminated sheet in white matte or gloss finishes ready for printing.
What adhesive backing do you offer?
Standard acrylic pressure-sensitive adhesive (3M-type equivalent) with release liner. For high-temp (up to 80°C continuous), we offer a high-tack acrylic variant. We can also laminate double-sided adhesive foam for mounting to uneven surfaces.
Can flexible magnets work at high temperature?
The limiting factor is the polymer binder. Standard PVC binder handles 80°C continuous, 100°C intermittent. For higher temperatures, use rigid ferrite magnets which handle 250°C.
Conversion Requirements
Specify the finished outline, backing, print artwork and delivery format together with the dimensional tolerances.
Dimensional Tolerances
Flexible magnet tolerances depend on the conversion process:
| Process | Typical Tolerance | Notes |
|---|---|---|
| Die-cut | ±0.3 mm | Most economical for shapes |
| Profile / laser cut | ±0.1 mm | Tighter shapes on request |
| Thickness | ±0.05 mm | Calendered sheet |
| Extruded profile | ±0.2 mm | Cross-section dependent |
Test & Quality Documentation
What ships with your parts — scoped per project during quotation.
Magnetic Properties
Certificate of Analysis with measured Br / Hcb / Hcj / (BH)max against the specified grade of your flexible magnet parts, from our demagnetization-curve test equipment.
Dimensional Inspection
Dimensional reports by gauge or CMM as agreed in the inspection plan; critical dimensions identified together during DFM review.
Compliance & Project Docs
RoHS / REACH declarations on request, and FAI / PPAP documentation per project requirements.
Process reference images are separated from the product gallery. They illustrate equipment and handling topics; they do not establish ownership of a facility, a customer delivery, or project-specific inspection results.
Factory Tour
Inside Flexible Magnets Manufacturing
Flexible sheet and strip move through compound forming, calendering, conversion, multipole magnetization, profile inspection and roll packing.
3 process viewsProduct-specific manufacturing
1 inspection viewRelevant quality equipment
1 packing viewProduct-appropriate protection
End-to-end process visibilityManufacturing · inspection · packing documented in one focused route
Manufacturing processInspection & testingPacking & dispatch
Integrated Calendering Line
Dedicated rubber-magnet equipment combines sheet forming, controlled cooling and continuous material handling.
Sheet Calendering
A dark compound passes through polished rollers to form continuous sheet; this image does not demonstrate adhesive lamination.
Multipole Magnetization
Programmable fixtures create the required pole pitch across sheet or strip.
Profile Vision Inspection
Optical measurement checks edge quality, width and repeating geometry.
Roll & Strip Packing
Flexible products are coiled without sharp bends and boxed to prevent deformation.
Manufacturing, inspection and packing photographs for this product family.Equipment route varies by material and geometryRemote video inspection available before shipment
Have a Drawing or Specification?
Send it to our team for engineering review and quotation — grade recommendation included.