Flexible sheet magnets, which are commonly used for refrigerator magnets, combine ceramic ferrite magnet powder with a flexible thermoplastic binder. The manufacturing process involves injection molding, which is well suited to high volume applications. The flexible nature of the material enables forming into intricate, tight-tolerance shapes. However, since the material is an alloy of ceramic ferrite material, the magnetic strength is weaker than a solid ceramic magnet. Still, the versatility of the flexible sheet enables its use in many applications.
Flexible sheets come in various thicknesses and widths. Thicknesses vary between 0.020" and 0.375". Widths vary from 0.187" up to 24". The material can be sold in strips up to 100 ft. long. Also, some come with an adhesive backing, which can simplify assembly if needed. The magnetic orientation is normally through the thickness.
For material grade and properties of Flexible magnets ,
A PIONEER IN MAGNETIC SOLUTIONS