ELECTRICALLY-CONDUCTIVE SHEET FOR SHIELDING ELECTROMAGNETIC WAVE AND ITS PRODUCTION

PURPOSE:To economically produce an electrically-conductive sheet having satisfactory electromagnetic wave shielding properties without damaging flexibility of nonwoven fabric. CONSTITUTION:This electrically-conductive sheet for shielding electromagnetic wave comprises >=10wt.%, preferably 10-50wt...

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Bibliographische Detailangaben
Hauptverfasser:	KUBO OSAMU, NISHIU MASAMICHI, MIO JIROU
Format:	Patent
Sprache:	eng
Schlagworte:	BRAIDING CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS COTTON-WOOL ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR IMPREGNATING OR COATING OF PAPER KNITTING LACE-MAKING LAUNDERING MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS NON-WOVEN FABRICS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRINTED CIRCUITS PRODUCTION OF CELLULOSE PULP COMPOSITIONS TEXTILES TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G TREATMENT OF TEXTILES OR THE LIKE TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS TRIMMINGS WADDING
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Beschreibung
Zusammenfassung:	PURPOSE:To economically produce an electrically-conductive sheet having satisfactory electromagnetic wave shielding properties without damaging flexibility of nonwoven fabric. CONSTITUTION:This electrically-conductive sheet for shielding electromagnetic wave comprises >=10wt.%, preferably 10-50wt.% of electrically-conductive fiber such as carbon fiber, metallic fiber, plated synthetic fiber, especially PAN-based carbon fiber coated with a metal in nonwoven fabric, wherein interlaced points of the electrically-conductive yarn are electrically bonded with a metallic thin film, and has 0.01-0.1gf.cm /cm average flexural rigidity. The weight of the nonwoven fabric is preferably 20-50g/m with respect to electromagnetic wave shielding properties and flexibility and the metallic thin film is stuck to the nonwoven fabric optimally by sputtering method. In the method, the equilibrium water content of the nonwoven fabric is preferably made to 0.1% and the thickness of the thin film is 300-1,500Angstrom preferably 500-1,000Angstrom .