Method of magnetically forming a particle filled polymer having

Details Method of magnetically forming a particle filled polymer having Method of magnetically forming a particle filled polymer having

1996-05-30

1998-07-28

Weisberger, Richard

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

264349, 1562724, B27N 302

Patent

active

057859132

ABSTRACT:
A method of magnetically fabricating a particle filled polymer having improved mechanical, electrical, or thermal surface characteristics. Finely divided ferrite particles are first mixed into a hardenable, liquid polymeric material. Next, the particles are magnetically oriented within the material along a selected pattern characterized by a gradient of increasing particle density toward a surface of the material. The polymeric material is then cured into a hardened state in order to affix the pattern of particles therein. The particles may be coated with a hardening material, such as diamond, and attracted to the surface of the material in order to impart desired wear and erosion resistance to the resulting composite. Alternatively, the particles may be coated with a electrically or thermally conducting material, such as silver, and magnetically pulled into intimate contact with one another to impart a high level of electrical or thermal conductivity to the resulting composite. The large particulate surface area provided by the magnetically obtained particle contact allows high levels of electrical or thermal conductivity to be obtained with the mixing of only small amounts of particulate matter to the polymer.

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