Electromagnetic interference shielding

Details Electromagnetic interference shielding Electromagnetic interference shielding

1996-11-15

1999-03-02

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Removal of liquid component or carrier through porous mold...

264104, 264113, 264122, 162101, 162146, B28B 126

Patent

active

058766430

ABSTRACT:
A foamed aqueous dispersion of a mixture of particulate plastics material is formed when the fibers are between 5% and 35% of the volume of the mixture, where no more than about 7% of the volume of the mixture is conductive fibers between about 7 and 20 mm long, and where any other fibers are reinforcing fibers with a high modulus of elasticity and between about 7 and about 50 mm long. A web is formed from the foamed dispersion using a wet laying process. The web is dried and compacted under heat and pressure. The compacted web is cooled to form a consolidated element in which the conductive fibers extend as a conductive lattice. The resulting element can be formed or molded into shielding to provide attenuation of electrical or magnetic fields.

REFERENCES:
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patent: 4882114 (1989-11-01), Radvan et al.
patent: 4969975 (1990-11-01), Biggs et al.
patent: 4973514 (1990-11-01), Gamble et al.
patent: 5053449 (1991-10-01), Biggs et al.
patent: 5089326 (1992-02-01), Bonazza
patent: 5399295 (1995-03-01), Gamble et al.

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