Electro magnetic interference shielding

Details Electro magnetic interference shielding Electro magnetic interference shielding

D - Textiles, Paper

21

F

9/69, 347/8

D21F 11/00 (2006.01) H05K 9/00 (2006.01)

Patent

CA 1281512

ABSTRACT 1. A method of making an element which can be formed or moulded into shielding for providing improved attenuation of electrical or magnetic fields which comprises the steps of: forming a foamed aqueous dispersion of a mixture of particulate plastics material and fibres, with the fibres comprising between about 5% and about 35% by volume of the mixture, not more than about 7% by volume of the mixture being conductive fibres between about 7 and about 20 mm long, and any other fibres being reinforcing fibres having a high modulus of elasticity as herein defined and being about 7 and about 50 mm long, forming a web from said foamed dispersion by a wet laying process, drying and compacting said web under heat and pressure and, cooling the compacted web to form a consolidated element in which the conductive fibres extend as a conductive lattice.

543092

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