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Rubber magnets

Rubber magnets

Introduction

Traditional materials for permanent magnets have some mechanical properties restricting their use: they are hard and generally brittle. This is due to the structure of magnetically hard materials in which it is necessary to form obstacles to the movement of the domain walls.
As a result, magnets need to be protected against physical impact and their machinability is very limited.
Practical requirements led to developing a magnetic material which is not brittle and is even elastic and flexible. Today it is called by the established term - magnetic rubber. It is manufactured from a fine powder of a magnetically hard material bound with an elastoplastic binder. The result resembles rubber of brown colour. The higher the content of the magnetic powder in the material the lower its elasticity and the greater its magnetic force.

Product range

It is manufactured in the form of thin foils from 0.3 to 4 mm thick, strips and belts, thicker plates and shaped profiles and products. The top surface may be finished by a coloured coating, mostly white, or a self-adhesive layer. Magnetisation can be of the dipole or multipole type just as with traditional permanent magnets.

Application

Magnetic rubber has been widely used in advertising and sign-marking (printing, signs, etc.), in the manufacture of holders of small souvenirs and in various industrial applications.

Table of properties – rubber magnets

Class Coercivity Remanence Max. product Tensile strength Stretching
HcB [kA/m] Br [mT] (BH)max [kJ/m3] [ MPa ] [ % ]
NF04 80-104 140-160 3,2-4,8 6,0-8,5 80-100
NF06 96-112 160-190 4,8-6,4 6,0-8,5 80-100
NF07 104-135 190-220 6,4-8,0 6,0-8,5 75-90
NF09 131-160 220-230 8,0-9,6 4,5-7,5 70-80
NF10 151-167 230-240 9,6-10,8 4,0-7,0 60-70
NF11 160-180 240-250 10,8-12,0 4,0-7,0 60-70

WHERE TO FIND US?

ABC MAGNET s.r.o.
Areal Big box, hall B10
Ve Žlíbku 1800
193 00  PRAHA 9 - Horní Počernice