Flexible magnet and converting guide
Adhesive Magnetic Sheets: Specification, Selection and Sourcing Guide
Direct answer: An adhesive magnetic sheet is a flexible magnetic construction with a magnetic face and an adhesive-backed face. Specify the compound and pole pattern, thickness and flexibility, roll or sheet dimensions, cut and laminate, mating target, production substrate, surface preparation, load direction, environment, packaging, and final functional test.
This is a flexible construction, not a rigid adhesive magnet
Flexible magnetic sheet commonly combines magnetic powder with a polymeric binder and is supplied as sheet, roll, strip, or converted shape. One face provides the magnetic function; another may carry pressure-sensitive adhesive, a liner, print layer, laminate, or other finish. Exact construction varies and must be identified before comparing products.
A discrete sintered or bonded magnet with pre-applied adhesive is a different mechanical and magnetic route. Use the adhesive magnet joint guide for that task.
Engineering Evidence · EM-CONV-01 · Revision A
Adhesive magnetic sheet conversion record
Control the magnetic construction, mating target, converting, bond, final function, and logistics as one product definition.
| Record field | Decision to control | Verification evidence |
|---|---|---|
| Construction | Compound, magnetic face, adhesive face, pole pattern, thickness, laminate or print layer | Approved material and construction sample |
| Mating target | Ferromagnetic surface, magnetic counterpart, or object being converted | Mating material, contact area, orientation, gap, and target |
| Conversion | Width, cut shape, holes, kiss cut, liner split, artwork, edges, and tolerances | Drawing, artwork, trial, and visual standard |
| Bonding | Substrate, surface preparation, curvature, adhesive, pressure, dwell, and environment | Actual substrate plus peel, shear, and exposure evidence |
| Function | Holding, positioning, display, closure, identification, or removable attachment | Final-construction test with real mating surface |
| Logistics | Flatness, curl, blocking, liner, packaging, storage, lot and revision control | Packaging trial and incoming acceptance record |
Define what the magnetic face must attract
A flexible magnetic sheet may attach to suitable ferromagnetic steel, interact with another magnetic component, or convert a nonmagnetic printed or molded item into a removable magnetic object. These are not equivalent. Define the mating material, thickness, coating, flatness, area, gap, orientation, movement, and allowed slip or peel.
Do not assume two magnetic sheets will align or attract correctly. Pole pattern, pole pitch, face orientation, and construction can produce attraction, weak coupling, or repulsion. Test the exact pair.
Thickness, flexibility and cut geometry work together
Thickness can change magnetic output, bending behavior, weight, edge profile, converting limits, and roll handling. Small shapes, narrow bridges, holes, sharp corners, tight roll diameter, and laminated layers can create curl, cracking, liner movement, or dimensional variation. The finished construction and cut process should be approved together.
Bond the adhesive face to the real production substrate
The adhesive face may be applied to paperboard, printed graphics, metal, glass, plastic, coated components, or another substrate. Surface energy, texture, curvature, dust, oil, moisture, ink, paint, plasticizer, and cleaner residue matter. Define application pressure, temperature, dwell, assembly sequence, and when the part may be loaded.
Printing, laminating and packaging are part of the product
If the sheet is printed, laminated, dry-erase finished, or supplied with a decorative face, control artwork revision, color and surface standard, adhesion between layers, cut registration, edge appearance, and environmental compatibility. Packaging must protect flatness, liner, edges, print, and magnetic face without causing curl, blocking, telescoping, or contamination.
RFQ inputs for adhesive magnetic sheets
- Functional use, mating target, holding or positioning direction, gap, movement, and acceptance test.
- Flexible compound preference, thickness, pole behavior, sheet or roll size, and finished cut geometry.
- Adhesive-backed face, substrate material and finish, surface preparation, pressure, dwell, and service environment.
- Print, laminate, liner, artwork, color, marking, edge, flatness, curl, and visual requirements.
- Packaging, roll core or sheet stack, storage, transport, traceability, prototype quantity, and annual demand.
Review the bonded magnet family, finished-condition tolerances, product routing, and inspection planning. Use the RFQ path for the actual construction.
Boundary: construction, magnetic output, adhesive performance, print compatibility, dimensions, converting route, availability, price, MOQ, lead time, and acceptance criteria remain specific to the proposed compound, pole pattern, substrate, environment, drawing, quantity, and validation plan.
Frequently asked questions
What is an adhesive magnetic sheet?
It is a flexible magnetic construction with a magnetic face and an adhesive-backed face, supplied as sheet, roll, strip, or converted shape. Its exact compound, pole pattern, thickness, adhesive, liner, and finish must be defined.
Will permanent magnets stick to magnetic sheets?
Sometimes, but the result depends on the sheet construction, pole pattern, magnetic face, counterpart poles, contact area, gap, orientation, and required force. Test the exact pair.
How should adhesive magnetic sheets be applied?
Use the approved production substrate and preparation, correct face, application pressure and temperature, defined dwell, controlled alignment, and a representative peel, shear, and functional test.
What is the difference between adhesive magnetic sheet and an adhesive magnet?
The sheet is a flexible compound and converting route. An adhesive magnet is usually a discrete rigid magnet with an adhesive-backed joint. Their output, thickness, cutting, pole behavior, assembly, and validation are different.
What should be sent for a magnetic sheet RFQ?
Provide the use and mating target, compound or output intent, pole behavior, thickness, sheet or roll dimensions, cut and artwork, adhesive substrate, environment, packaging, quantities, and final test.