Abstract

This study indicates broadly the effects of moisture, and certain associated experimental factors on the electrical surface resistivity of copy papers. Findings were that surface resistivity in Ω/□, slightly increased with increasing paper thickness and that decreased with increasing paper density and increasing paper grammage. The logarithm of the electrical surface resistivity of the copy papers decreased directly as the moisture content increased. The surface resistivity increased with increasing paper ash on ignition (900°) content, which denoted the mineral fillers of the paper. The surface resistivity decreased with increasing tensile strength in the machine direction (MD) and increased with increasing tensile strength in the counter machine direction (CD). The surface electric resistivity decreased with increasing roughness Bendtsen in ml/min and roughness Bendtsen decreased with increasing ash content on ignition. In this work we produced a system capable of calculating the surface resistivity from the electrical resistance measurements. Finally, using this system we compared and analyzed the surface resistivity of eleven insulating copy paper samples. Optimization of the surface electric resistivity value could help produce more eco-friendly copy papers.

Keywords: Copy paper; Electric surface resistance; Surface resistivity; Paper thickness; Paper density; Paper moisture content; Moisture content frequencies table; Ash content on ignition; Paper grammage; Paper tensile strength; Machine direction (MD); Counter machine direction (CD); Paper roughness Bendtsen in ml/min; Electrical resistivity limits for eco-certified copy papers