Abstract: Provided is a three-dimensional object formation powder material used for three-dimensional object formation of forming a three-dimensional object by stacking up a plurality of powder material layers each bound by a resin and having a predetermined shape. The three-dimensional object formation powder material contains particles in which a plurality of cores are fixed by a water-soluble resin.

Abstract: Provided is an active-energy-ray-curable composition including: a monomer (A) having a hydrogen-bonding capacity; and a compound (B) having a hydrogen-bonding capacity and containing straight-chain alkyl containing 4 or more carbon atoms, wherein a cured product of the active-energy-ray-curable composition is a solid that exhibits a compressive stress of 2 kPa or higher in response to compression by 1%, and wherein the active-energy-ray-curable composition is a liquid in an environment of 60 degrees C.

Abstract: Provided is a bolus formed of a hydrogel, wherein the hydrogel includes water, a polymer, and a mineral, and wherein the bolus is applied to a patient who receives a radiation therapy.

Abstract: Provided is a three-dimensional object including a hydrogel containing water as a main component, wherein the three-dimensional object contains a chelate agent.

Abstract: Provided is a three-dimensional object producing method, including: a first step of forming a film by delivering a first liquid as a hydrogel precursor including at least a multifunctional monomer; and a second step of curing the film formed in the first step, wherein the first step and the second step are repeated a plurality of times.

Abstract: A hydrogel liquid precursor includes an inorganic mineral and a monomer, wherein the inorganic mineral accounts for 15 percent by mass or more of the hydrogel liquid precursor, wherein the hydrogel liquid precursor has an initial viscosity of 20 mPa·s or less at 25 degrees C., and wherein the hydrogel liquid precursor has a ratio of a two-week viscosity to the initial viscosity of from 0.90 to 1.10, the two-week viscosity representing a viscosity of the hydrogel liquid precursor at 25 degrees C. after being left at 50 degrees C. for two weeks.

Abstract: A method of manufacturing a solid freeform fabrication includes forming a liquid film constituting a model part and a detail part with a model part forming material and a detail part forming material, respectively, curing the liquid film, repeating the forming and the curing, wherein the model part includes one or more surfaces without a support and the detail part is disposed adjacent to at least one of the one or more surfaces.

Abstract: A method of fabricating a solid freeform fabrication object, includes discharging multiple liquid droplets of modeling material and multiple liquid droplets of supporting material to a stage by a discharging device, merging the multiple liquid droplets of the modeling material into a liquid droplet of the modeling material in the air and the multiple liquid droplets of the supporting material into a liquid droplet of the supporting material in the air, curing the liquid droplet of the modeling material and the liquid droplet of the supporting material on the stage to form a layered fabrication object, and repeating the discharging and the curing to laminate the layered fabrication object to manufacture the solid freeform fabrication object, wherein the discharging device stands still during at least the discharging to a boundary area of the modeling material and the supporting material on the stage.

Abstract: Provided is a three-dimensional object producing method, including: a first step of forming a film by delivering a first liquid as a hydrogel precursor including at least a multifunctional monomer; and a second step of curing the film formed in the first step, wherein the first step and the second step are repeated a plurality of times.

Abstract: A hydrogel liquid precursor includes an inorganic mineral and a monomer, wherein the inorganic mineral accounts for 15 percent by mass or more of the hydrogel liquid precursor, wherein the hydrogel liquid precursor has an initial viscosity of 20 mPa·s or less at 25 degrees C., and wherein the hydrogel liquid precursor has a ratio of a two-week viscosity to the initial viscosity of from 0.90 to 1.10, the two-week viscosity representing a viscosity of the hydrogel liquid precursor at 25 degrees C. after being left at 50 degrees C. for two weeks.

Abstract: Provided is a liquid material for forming a three-dimensional object, the liquid material adapted to be delivered to a powder material for forming a three-dimensional object to harden the powder material, the powder material containing an organic material and a base material, the liquid material including a cross-linking agent cross-linkable with the organic material and a resin having a glass transition temperature of 50° C. or higher or a melting point of 50° C. or higher.

Abstract: A method of manufacturing a solid freeform fabrication object includes curing a liquid film made of an active energy ray curable liquid composition to form a layer; and laminating the layer to obtain the solid freeform fabrication object, wherein the solid freeform fabrication object is manufactured at an absolute humidity of from 5.5 to 20 g/m3.

Abstract: A hydrogel structure includes a hollow tubular structure having an inner diameter of 1.0 mm or less, wherein the hydrogel structure has a transmission of 80 percent or more in a visible light range.

Abstract: A resin composition for solid freeform fabrication includes a thermoplastic resin, wherein the resin composition satisfies the following conditions 1 and 2. 1. The resin composition has a glass transition temperature (Tg) of 100 degrees C. or higher. 2. A molded object of the resin composition is dissolved in tetrahydrofuran at 25 degrees C. within 24 hours at a mass ratio (the molded object/tetrahydrofuran) of the molded object to tetrahydrofuran is 1/10 when the molded object is heated at 220 degrees C. for two hours.

Abstract: An active energy ray liquid composition is provided. A cured product of the active energy ray curable liquid composition is a solid at 25° C. and a liquid at 60° C., and the solid exhibits a compression stress of 2.0 kPa or more when compressed 1%.

Abstract: A method of manufacturing a solid freeform fabrication object includes forming a layer by solidifying a curable liquid composition by a solidifying device to form a solidified layer, repeating the forming to laminate the solidified layer to form a model portion and a support to support the model portion, and removing the support, wherein the support includes a water decaying area and the area other than the water decaying area, the water decaying area forming a continuous area including the surface of the support in contact with the model portion and at least a part of the surface of the support not in contact with the model portion.

Abstract: A solid freeform fabrication object includes a hydrogel including a polymer, water, and a coloring material inclusion substance.

Abstract: Provided is a three-dimensional object formation method including: a first step of forming a film by delivering a first liquid containing at least water and a hydrogel precursor: and a second step of curing the film formed in the first step, wherein the first step and the second step are repeated a plurality of times.

Abstract: A liquid droplet ejecting method for ejecting a liquid from at least one ejection hole to form the liquid into liquid droplets, the method including: applying a vibration to the liquid in a liquid column resonance-generating liquid chamber, in which the ejection hole is formed, to form a standing wave through liquid column resonance, and ejecting the liquid from the ejection hole, which is formed in a region corresponding to an antinode of the standing wave, to form the liquid into liquid droplets.

Abstract: A cleaning method for cleaning a droplet ejector, which includes nozzles to eject a particulate material composition liquid, and a nozzle plate bearing the nozzles is provided. The cleaning method includes forming a substantially closed cleaning space outside the nozzles and the nozzle plate; supplying a cleaning liquid to the cleaning space so that the nozzles and the nozzle plate are contacted with the cleaning liquid; and vibrating the cleaning liquid when the nozzles and the nozzle plate are contacted with the cleaning liquid to clean the nozzles and the nozzle plate.