Patent ID: 6096415
Filing Date: 2000-08-01
Classification: G03G,Y10T

Abstract:
An electrostatic or electrographic recording composition comprising a polymeric base material and an electrically conductive layer comprising an electrically conductive polymer;said electrically conductive layer being disposed on at least one surface of thepolymeric base material;and a dielectric recording layer having a surface resistivity of from 0.3.times.10.sup.6 to 3.times.10.sup.9 ohms/square disposed on the electrically conductive layer;said polymeric base material comprising a microporous synthetic thermoplastic polymer film having a volume fraction of interconnected pores of from >50 vol % to 95 vol %;said polymeric base material comprising from 30-90 wt %, based on the total weight of the polymeric base material, of a finely dispersed organic filler which is embedded in the polymeric base material;said polymeric base material having a water absorption capacity, determined by means of the Cobb value in accordance with ISO 535-1976(E) with a measuring time of 12 seconds, of from 30 g/m.sup.2 to 120 g/m.sup.2 ;said polymeric base material having an electrical volume resistance after said electrically conductive layer is disposed thereon of from 6.times.10.sup.6 ohms.times.cm to 10.times.10.sup.9 ohms.times.cm; wherein disposition of the electrically conductive layer on the polymeric base material results in the polymeric base material becoming impregnated with the electrically conductive polymer of the electrically conductive layer.