Method of manufacturing structural body, liquid tank and ink jet printing apparatus, and an ink jet printing apparatus

摘要

A method of manufacturing a structural body, a liquid tank and an ink jet printing apparatus, all having an opening in which a gas-liquid separation member maintains a good repellency, and also an ink jet printing apparatus are provided. ;A gas-liquid separation member is fused by a thermal fusing head to a predetermined opening in the ink tank, after which the gas-liquid separation member is subjected to repellency application processing. More specifically, the repellency application processing is done as by coating or spraying a repellency application agent to the gas-liquid separation member. When the opening with this porous film is subjected to suction, only air in the tank is sucked out but ink is not drawn out because the ink cannot pass through the gas-liquid separation members. Hence, the interior of the tank can be kept at a negative pressure.