Patent ID: 6610395
Filing Date: 2003-08-26
Classification: H05K,Y10T

Abstract:
A process for forming a flexible, breathable electromagnetic shielding material for forming electromagnetic shielding articles comprising:(a) forming a molten thermoplastic polymer mixture comprising one or more polymers; (b) melt spinning said polymer mixture to form a plurality of multilobal fibers, said fibers comprising a central core having a plurality of T-shaped lobes projecting therefrom, each of said T-shaped lobes having a leg and a cap, said lobes defining a longitudinally extending internal cavity between two adjacent legs that extends the entire length of the fiber; (c) arranging together said plurality of multilobal fibers into a sheet, the sheet having at least one surface; and (d) applying electromagnetic shielding powder particles to at least one surface of said sheet to infuse said electromagnetic shielding powder particles between said multilobal fibers and into each cavity, said powder particles being of such a size, shape and makeup that they are securely retained within each cavity.