Abstract: An ink jet recording method including ejecting an aqueous ink from a first ejection port, and ejecting, from a second ejection port, an aqueous reaction liquid containing a reactant that reacts with the aqueous ink. The liquid ejection apparatus includes an element substrate having the second ejection port configured to eject the aqueous reaction liquid, a pressure chamber, and an energy-generating element, an upstream channel r, and a downstream channe, and the element substrate has a face configured to face the record medium in an ejection direction of the aqueous reaction liquid, wherein the method further including ejecting the aqueous reaction liquid from the second ejection port which is located closer to the pressure chamber than the face, and flowing the aqueous reaction liquid from the upstream channel to the downstream channel through the pressure chamber.

Abstract: A liquid ejection apparatus ejecting an aqueous ink and an aqueous reaction liquid containing a reactant that reacts with the aqueous ink to record an image on a record medium, wherein the liquid ejection apparatus includes an element substrate including: a plurality of individual channels having an ejection port configured to eject the liquid, a pressure chamber configured to supply the liquid to the ejection port, and an energy-generating element configured to generate energy to eject the liquid; an upstream channel configured to supply the liquid to the plurality of individual channels; and a downstream channel for outflow of the liquid from the plurality of individual channels, the ejection port has a protrusion protruding toward a center of the ejection port.

Abstract: The present invention provides an ultra-high molecular weight polyvinyl alcohol resin that can provide, when acetalized, a resin film having high strength and high transparency. The present invention also provides a polyvinyl acetal resin, a method for producing a polyvinyl alcohol resin, and a method for producing a polyvinyl acetal resin. Provided is a polyvinyl alcohol resin having at least one selected from the group consisting of a sulfone group, an alkyl sulfonyl group, an aromatic sulfonyl group, a sulfine group, an imidazoline group, a carboxy group, an amide group, an amino group, and a hydroxy group at at least one molecular end of a main chain, having a weight average molecular weight (Mw) of 1,000,000 or more, and containing a water-soluble surfactant in an amount of 0.02% by weight or less.

Abstract: The present invention provides a resin composition for sintering, an inorganic fine particle-dispersed slurry composition containing the resin composition for sintering, and an inorganic fine particle-dispersed sheet formed using the resin composition for sintering or inorganic fine particle-dispersed slurry composition. The present invention relates to a resin composition for sintering, containing a binder resin, the binder resin including a (meth)acrylic resin (A), the (meth)acrylic resin (A) having at least one selected from the group consisting of a sulfone group, an alkyl sulfonyl group, an aromatic sulfonyl group, a sulfine group, an imidazoline group, a carboxy group, an amide group, an amino group, and a hydroxy group at at least one molecular end of the main chain and having a weight average molecular weight (Mw) of 1,000,000 or more, an amount of a water-soluble surfactant in the resin composition for sintering being 0 parts by weight or more and 0.

Abstract: The present invention provides a thermally expandable microcapsule that has excellent heat resistance and compression resistance and that enables the production of a foam molded article that is less likely to undergo deterioration or appearance defects over a long period of time, as well as a foamable masterbatch and a foam molded article each produced using the thermally expandable microcapsule. Provided is a thermally expandable microcapsule including a shell and a volatile expansion agent as a core agent encapsulated by the shell, the shell containing a black material and a polymer compound.