摘要:
An ink absorber (24,25,26,28,34,45,46) is housed inside a housing of an ink tank (20,30,40) and is capable of retaining ink. The ink absorber (24,25,26,28,34,45,46) has an outer surface equal to or corresponding to a shape of an internal surface of the housing and is made of a fiber material obtained by compressing a fiber body and thermally molding at least a surface thereof. An ink tank (20,30,40) is comprised of the ink absorber (24,25,26,28,34,45,46) and the housing. An ink jet cartridge is comprised of the ink tank (20,30,40) and a print head (21,31). A process for producing the ink tank comprises a first molding step of molding a continuous fiber aggregate of a rod shape or a plate shape with elasticity, a step of cutting the fiber aggregate thus molded to form a fiber body, a second molding step of subjecting the fiber body to compression and thermal molding so as to provide the fiber body with an outer surface corresponding to a shape of the inside of the housing, thus forming an ink absorber and a step of inserting the ink absorber into the inside of the housing.