Medium convey apparatus and ink-jet recording apparatus

An ink jet recording apparatus comprising:

• a recording head opposed to an endless belt and configured to eject ink onto a recording medium;
• a convey mechanism including the endless belt having a medium-placed face on which the recording medium is placed, the convey mechanism being configured to convey the recording medium placed on the medium-placed face by rotating the endless belt along a predetermined path;
• a first adsorbing mechanism including a base member formed of an insulating material, a first electrode and a second electrode, each of the first electrode and the second electrode being bonded to an upper face of the base member and facing a back-face of the endless belt which is a back face of the medium-placed face, wherein the first adsorbing mechanism is configured to adsorb the recording medium to the medium-placed face by applying a specific voltage to the first electrode and the second electrode to generate, between the first electrode and the second electrode, a current flowing through the recording medium placed on the medium-placed face;
• and
• a surface layer member bonded to upper faces of the first electrode and the second electrode, wherein the surface layer member is disposed at a position opposite to the recording head with the endless belt interposed therebetween, and an upper face of the surface layer member faces the back-face of the endless belt,
• wherein the surface layer member has at least an area located on the first electrode and the second electrode, wherein the area is formed of a resin material containing an ion conductive resistivity control material, wherein a volume resistivity of the resin material ranges from 1010 to 1014 Ω·cm when the specific voltage is applied in an environment at a temperature of 22.5° C. and a relative humidity of 50%, and
• wherein the endless belt is formed of a resin material containing an electric conductive resistivity control material, and is not formed of the resin material containing the ion conductive resistivity control material.