FIRE-RESISTANT ELECTROMAGNETIC WAVE SHIELD BOARD

• Main Authors: SHIGEKURA SUKEMITSU, OKUDA YASUMASA, SAKAMOTO TADASHI, NAKAZONO TETSUO
• Format: Patent
• Language: English
• Published: 18.01.2000
• Edition: 7
• Subjects: ARTIFICIAL STONE; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CEMENTS; CERAMICS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIME, MAGNESIA; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; METALLURGY; PRINTED CIRCUITS; REFRACTORIES; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF NATURAL STONE

PROBLEM TO BE SOLVED: To obtain a board with high electromagnetic wave shielding effect, meeting the standard as a fire-resistant construction material by incorporating an aqueous dispersion of disintegrated used magnetic tickets with a fire-resistant matrix material and an electroconductive fiber followed by subjecting the resultant slurry to wet papermaking process or extrusion molding. SOLUTION: This fire-resistant electromagnetic wave shielding board is obtained by incorporating an aqueous dispersion of disintegrated used magnetic tickets with a fire-resistant matrix material and an electroconductive fiber followed by subjecting the resultant slurry to wet papermaking process or extrusion molding; wherein the fire-resistant matrix material to be used is e.g. a mixture of gypsum and water-granulated slag, Portland cement, blast furnace cement, fly ash cement; while the electroconductive fiber to be used is e.g. highly alkali-resistant carbon fiber, metallized synthetic fiber, metallic fiber such as of Cu or Al. The composition of this board is as follows: about 5-20 wt.% of the disintegrated product, about 30-80 wt.% of the fire-resistant matrix material, and about 0.5-5 wt.% of the electroconductive fiber, and pref. furthermore, about 5-60 wt.% of charcoal powder.