ELECTRICITY CONDUCTING SHEET OF CELLULOSE FIBERS AND COMPOSITE MATERIAL PRODUCED FROM THEM Russian patent published in 2003 - IPC

FIELD: cellulose layers for shielding electric and high-frequency fields. SUBSTANCE: thin electricity conducting cellulose layer capable of shielding electric and high-frequency fields is 30 to 80 mcm thick, it weighs 20 to 60 g/sq. m, and incorporates 95-100% of carbon and cellulose fibers in terms of absolutely dry weight, proportion of carbon fibers, 1 to 15 mcm in diameter and 1 to 29 mm in length, being 4 to 20 mass percent in terms of absolutely dry weight and proportion of cellulose fibers, 75 to 96 mass percent in terms of absolutely dry weight. Layer is noted for high electric conductivity and ability of shielding electromagnetic fields with added advantage of excellent permeability for steam. Layer can be easily included in pressboard composition. Layer and pressboard sheet are suited to use for standard materials of floors, walls, and ceilings, gypsum and concrete slabs. EFFECT: enhanced ability of shielding electric and electromagnetic fields, facilitated handling, reduced cost. 6 cl, 5 tbl, 3 ex