Patent ID: 6540874
Filing Date: 2003-04-01
Classification: D21H

Abstract:
A method for manufacturing asphalt-grade carbon fiber paper, comprising the steps of:(a) preparing a mixture of asphalt grade carbon fiber and paper base material, said mixture containing 10-50 weight % of said asphalt grade carbon fiber and 50-90 weight % of said paper base material, said paper base material containing 80-85 weight % of paper base fiber and 15-20 weight % of soluble resin; (b) preparing an aqueous dispersion of said mixture and water in a beater, the content of said mixture in said aqueous dispersion being in the range of 0.5-0.8 weight % of said aqueous dispersion; (c) beating said aqueous dispersion in a beater for 2-4 hours at a temperature ranging from 25Â° C. to 40Â° C.; (d) adding rosin and polyvinyl alcohol to said aqueous solution in amounts corresponding to 0.5-2 weight % of rosin and 2-6 weight % of polyvinyl alcohol of absolute dry weight of said mixture; (e) stirring results of step (d) to form a homogeneous slurry; (f) forming paper sheets from said slurry; and (g) drying and reeling said paper sheets.