Patent ID: 6641760
Filing Date: 2003-11-04
Classification: C08J,Y10T

Abstract:
A method of producing an endless-belt-shaped film with a single layer structure comprising an insulating matrix resin and an electroconductive material dispersed in the form of needles in said insulating matrix resin with a longitudinal side of said needles of said electroconductive material being oriented in the direction normal to an external surface of said film, wherein a cross section of each of said needles of said electroconductive material in the direction normal to said external surface of said film is in the shape of a quadrilateral with unequal diagonal lines, and wherein a longer diagonal line is oriented in the direction normal to said external surface of said film and a shorter diagonal line is oriented in the direction normal to said longer diagonal line, comprising the steps of:dispersing said electroconductive material in a solution of said matrix resin in a solvent to form a dispersion of said electroconductive material in said solution of said matrix resin, and subjecting said dispersion to centrifugal molding to orient a longitudinal side of said needles of said electroconductive material in the direction normal to an external surface of said film, wherein a cross section of each of said needles of said electroconductive material in the direction normal to said external surface of said film is in the shape of a quadrilateral with unequal diagonal lines, and wherein a longer diagonal line is oriented in the direction normal to said external surface of said film and a shorter diagonal line is oriented in the direction normal to said longer diagonal line, and removing said solvent therefrom.