materials offer the product designer a uniquely
desirable combination of properties at lower
cost than other magnet materials. The
flexibility and machinability of these materials
permit design innovations and automated
manufacturing techniques not possible with rigid
or brittle materials.
materials can be bent, twisted, coiled, punched,
and otherwise machined into almost any shape
without loss of magnetic energy.
energy flexible materials may sometimes replace
Ceramic 1 materials, if close tolerances are not
required, and if operating temperatures are
below about 250F.
Standard grades of flexible materials have
energy products from 0.6 MGOe to 1.6 MGOe.
to produce materials in strip form (from
about 1/4" to 10" wide)
to produce materials in sheet form (up
to about 24" wide)
both methods, the first step is to form a
"compound", which is a wet slurry of
powder in the binder material.
involves squeezing heated compound through a
shaped die, cooling the shaped material as it
exits the die, and magnetizing the material. The
standard grade materials are only magnetic on
involves squeezing the compound between rollers
to compress and flatten it to form a sheet. The
sheet is fed through sets of rollers several
times until it reaches the desired thickness. It
is then slit to the desired width and
magnetized. The standard grade materials are
only magnetic on one side.
Sizes, and Grades Available
stocked shapes include strip and sheet in the
lower energy grades, strip and a variety of
punched parts in ring, disc, and bar shapes in
the higher energy grades. Non-standard shapes
and sizes can be fabricated to blueprint
specifications from raw stock. Non-standard
profiles of the 0.6 MGOe material can be
extruded by fabricating special dies.
using metal or other components and magnets can
be fabricated by adhering magnets with adhesives
to suit a range of environments, by mechanically
fastening magnets, or by a combination of these
methods. We are able to laminate a variety of
standard pressure sensitive adhesives to
magnetic strip. Standard adhesives are type
"A", for general purpose indoor use,
and type "T", for general purpose
outdoor use. Type "T" adhesives are
formulated for greater resistance to UV effects.
surface treatments are required to protect
against corrosion. We are able to laminate a
variety of decorative facings to magnetic strip.
materials are relatively easy to fabricate: they
may be cut, scored, punched, slit, or die cut to
shape. We are equipped to fabricate these
materials to specification.
energy flexible magnets are magnetized with
multiple poles on one surface to give greater
holding force. Higher energy flexible magnets
are magnetized either multiple pole, or single
pole on one surface. No special handling
precautions have to be taken with flexible
magnets since they are relatively weak
magnetically, and are not brittle.
properties of flexible magnets degrade linearly
with temperature in the same way as Ceramic
magnets. However, the limiting factor for
flexible magnets are the binder materials used
to render them flexible: these begin to flow at
temperatures of about 250F.
Applications for Flexible Magnets
magnets are used in a variety of applications
from labeling, holding, door gaskets, and signs,
to micromotors and CRT focusing. Typical
applications: crafts, toys, games, magnetic
signs, displays, production control (or visual
aid) systems, warehouse shelf labeling, door
gaskets, door and cabinet closures, small tool
and instrument holders, movable markers,
advertising premiums, magnetic business cards,
architectural planning layouts, etc.