Electromagnetic interference (EMI) shielding and electrostatic d

Details Electromagnetic interference (EMI) shielding and electrostatic d Electromagnetic interference (EMI) shielding and electrostatic d

1997-05-13

1999-05-18

Nutter, Nathan M.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Staple length fiber

428367, 428369, 428408, 524439, 524440, 524441, 523137, B32B9/00

Patent

active

059049804

ABSTRACT:
Lightweight and strong electromagnetic interference (EMI) shielding and electrostatic discharge (ESD) reinforced degradable polymer and monomer material and plastic enclosure materials are provided for electronic devices and EMI shielded rooms. A degradable polymer or monomer (polylactic acid, starch and polycaprolactone, cellulose esters, zein, modified lesquerell and soybean oils, and glucaric acid) contain an EMIS/ESD additive of iron coated fibers, iron-carbone (Martensites), iron-nickel coated carbon fibers, stainless-steel fibers, aluminum fibers, conductive flakes, and conductive powders. Intrinsic conductive polymers such as polyparaphenylene, polyacetylene, polyanaline, polyquinoline and polythiophene are also used. By combining the degradable polymer/monomer and one or more of the additives, the enclosures meet the U.S. government requirements for electromagnetic interference (EMI) shielding and electrostatic discharge (ESD) on both consumer electronics and military application. The combining of the polymers/monomers with the additives increases the strength of the materials and thermal conductivity.

REFERENCES:
patent: 5177660 (1993-01-01), Kilner
patent: 5582912 (1996-12-01), McCullough, Jr. et al.

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