Abstract: An ink jet recording head is formed by forming a solid layer of removable material on a substrate to enable formation of flow paths and liquid chambers, coating a surface of the solid layer with a resin and removing the solid layer. The coating is performed by providing a mold, part of which is in contact with the solid layer, and coating the surface of the solid layer excluding at least a part of the surface. Further, bonding wires connecting the head to a circuit board are at least partly coated with the resin.

Abstract: A process for producing a liquid-jet recording head comprising a liquid-discharging orifice, a liquid path communicating to the orifice, and a liquid ejecting energy-generating element for generating an energy to be utilized for ejecting the liquid, which comprises the steps of pouring, into the liquid path, a solution containing a perhydropolysilazane represented by the formula (I): ##STR1## to allow the solution to attach onto the wall of the liquid path, and after attachment of the solution, heating the solution to form a hydrophilic layer comprising baked perhydropolysilazane on the wall of the liquid path.

Abstract: An ink jet head having a plurality of ink flow path walls forming a plurality of ink pathways by joining said plurality of ink flow path walls to a substrate for an ink jet head, said plurality of ink flow path walls being tightly bonded to said substrate without being debonded even in the case of continuously operating the ink jet head over a long period of time using highly alkaline ink.

Abstract: An ink jet head comprises parts for holding liquid ink, the parts being sealed with a moisture-curing sealant composed mainly of an organic high polymer compound having an alkoxysilane moiety represented by Formula (1) in the molecule thereof: ##STR1## where X is hydrogen, methyl, ethyl, propyl or halogen; R is methyl, ethyl or propyl; and n is 1, 2 or 3.

Abstract: An ink jet recording head for discharging liquid and recording on a recording medium includes a substrate having a liquid path, and a discharge opening provided on a surface of the substrate and communicating with the liquid path. Plurality raised surface irregularities are formed on the surface of the substrate having the discharge opening. The surface irregularities are disposed in a predetermined pattern and have protruding portions which are distinct from one another and which have been subjected to a liquid repellant surface treatment.

Abstract: An ink jet recording head having a fluid passage constituted by forming, on a substrate, an outer frame made of a hardened resin obtained by transfer molding, wherein a transfer-molding resin composition which is the material of the hardened resin is composed of an epoxy resin, a hardening agent, an agent for enhancing hardening and a filler, and the content of the filler is ranged from 0.5 to 17.0 wt. %.

Abstract: An ink jet head accomplishes high quality recording for a long term by an improved liquid repellency treatment. This liquid repellency treatment is applied to at least a peripheral portion of a discharge port on an ink discharge port forming surface of the ink jet head. A mixture of a fluorine-containing high polymer compound and a compound having fluorine substituted hydrocarbon group and a silazane group, alkoxysilane group or halogenized silane group is employed as a liquid repellent agent.

Abstract: An ink jet recording head comprises an ink path communicating with an orifice for discharging an ink, and energy-generating means for generating energy to be utilized for discharging the ink from the orifice, provided along the ink path, wherein a base member provided with the energy-generating means and a resin member provided with a recess for forming the ink path are bonded to each other while keeping the recess inside, thereby forming the ink path, and wherein a shearing bonding force between the resin member and the base member is larger than a stress generated due to a difference in coefficient of thermal expansion between the resin member and the base member.

Abstract: A process for preparing an ink jet recording head, comprises: the step for providing a first material which is volatilized by imparting an active energy in a layer on a substrate; the step for patterning the layer of said first material by imparting said active energy to the layer of said first material corresponding to the pattern of ink channels communicated to the discharging outlet which discharges ink; the step for providing a second material so as to cover the layer of said material shaped in the pattern formed by said step; and the step for forming said ink channels by volatilization of the layer of said pattern shaped first material coated with said second material by imparting said active energy.

Abstract: A material for a liquid ejection ink-jet recording apparatus that is contactable with a recording liquid wherein the material is formed by a cured substance made from cyclic aliphatic epoxy resin and acid anhydride. The material is used in producing a liquid ejection recording head. The head is included in a liquid recording apparatus.

Abstract: A method for surface treatment of an ink jet recording head, having the step of transferring a surface treating agent provided on a support to the ink discharging opening surface having ink discharging openings of an ink jet recording head formed thereon from the support.

Abstract: A recording implement comprises at least an ink storing member and an ink feeding member, wherein a part or all of the site of said recording implement which is in contact with ink is formed of a polyolefin as the main component obtained by addition of an inorganic metal salt as the neutralizing agent for the catalyst during polymerization.