Ink container, ink jet head having ink container, ink jet apparatus having ink container, and manufacturing method for ink container

A liquid container for supplying liquid to a recording head, comprising:

• a fibrous material for retaining ink to be supplied to an ink jet recording head;
• a main body accommodating the fibrous material;
• and
• an ink discharging portion, formed in the main body, for supplying the ink to said ink jet recording head,
• wherein the fibrous material includes fibers having diameters which are smaller adjacent said liquid discharging portion than those of fibers in other portions of said fibrous material, and
• wherein the fibers include fiber strands, each of which substantially includes a core portion resin material having a first melting temperature and an external portion resin material having a second melting temperature lower than the first melting temperature, the fiber strands being crossed at a great number of crossing portions at which only external portions of said fiber strands are welded together, and by said welded crossing portions forming a great number of gaps that are sized fine enough to produce negative pressure for retaining the ink therein.