An ink jet recording head that includes a substrate having an ejection orifice for ejecting a liquid and a member provided with a recessed portion for accommodating the substrate, the head including a gap formed between a wall of the recessed portion of the member and the substrate, and a sealing material that seals the gap, in which the sealing material contains a cured product of a composition containing at least a hydrogenated bisphenol A type epoxy resin, a solid basic compound, and polythiol.

A method for preparing a material for use as a surface of a medical device may include printing, with an ink jet printer and using ink that is curable with ultraviolet light, content onto a surface of material that includes woven ticking fabric laminated with polyurethane. The method may also include curing the ink with the ultraviolet light. The method may also include cutting a section of the material in registration to the content printed on the surface for use in a medical device.

A method for preparing a material for use as a surface of a medical device may include printing, with an ink jet printer and using ink that is curable with ultraviolet light, content onto a surface of material that includes woven ticking fabric laminated with polyurethane. The method may also include curing the ink with the ultraviolet light. The method may also include cutting a section of the material in registration to the content printed on the surface for use in a medical device.

An active energy ray curable composition contains an acrylamide compound A1 represented by the following Chemical formula 1 or the following Chemical formula 2; a multi-functional polymerizable compound B1 having an SI value of 3 or less in a skin sensitivity test; a polymerization initiator C1 having no maximum absorption peak in a wavelength range of from 365 to 405 nm; and a hydrogen donor D, ##STR00001##

An active energy ray curable composition contains an acrylamide compound A1 represented by the following Chemical formula 1 or the following Chemical formula 2; a multi-functional polymerizable compound B1 having an SI value of 3 or less in a skin sensitivity test; a polymerization initiator C1 having no maximum absorption peak in a wavelength range of from 365 to 405 nm; and a hydrogen donor D, ##STR00001##

The invention relates to a process of manufacturing a composite comprising a layer of a polyimide and a substrate, comprising at least these steps: i. Providing a first composition comprising an acid compound; and a second composition comprising a diamine compound; ii. Forming a first layer on the substrate, and iii. Forming a second layer on the first layer, wherein if the first layer is formed by applying the first composition, the second layer is formed by applying the second composition, and vice versa; wherein the first and the second layer overlap at least in part thereby forming a pattern on the substrate; iv. Conducting a thermal treatment on the pattern wherein the polyimide layer is formed. The invention further relates to such a composite, a kit comprising a first composition comprising an acid compound and a second composition comprising a diamine compound as well as a use of the kit.

The invention relates to a process of manufacturing a composite comprising a layer of a polyimide and a substrate, comprising at least these steps: i. Providing a first composition comprising an acid compound; and a second composition comprising a diamine compound; ii. Forming a first layer on the substrate, and iii. Forming a second layer on the first layer, wherein if the first layer is formed by applying the first composition, the second layer is formed by applying the second composition, and vice versa; wherein the first and the second layer overlap at least in part thereby forming a pattern on the substrate; iv. Conducting a thermal treatment on the pattern wherein the polyimide layer is formed. The invention further relates to such a composite, a kit comprising a first composition comprising an acid compound and a second composition comprising a diamine compound as well as a use of the kit.

An ink contains water, an organic solvent, a polyurethane resin, and a cyclic ester including a structure represented by Chemical formula I, wherein the proportion of the cyclic ester having a crystal having a particle diameter of 1 μm or greater is less than 4 ppm of the total of the ink after the ink is allowed to stand at a temperature range of from 20 to 30 degrees C. for 30 days. ##STR00001##

A recording method of the present disclosure includes: an adhesion step of ejecting an ink composition from an ink jet head so as to be adhered to a recording medium; and a primary heating step of heating the ink composition adhered to the recording medium in the adhesion step, and the ink composition is a water-based ink containing an organic compound which is a solid at 25° C. having a standard boiling point of 280° C. or less and which has a solubility of 50 [g/100 g of water] or more in water at 25° C.

A recording method of the present disclosure includes: an adhesion step of ejecting an ink composition from an ink jet head so as to be adhered to a recording medium; and a primary heating step of heating the ink composition adhered to the recording medium in the adhesion step, and the ink composition is a water-based ink containing an organic compound which is a solid at 25° C. having a standard boiling point of 280° C. or less and which has a solubility of 50 [g/100 g of water] or more in water at 25° C.