Abstract: A power storage device includes a first electrode having a first current collector, a second electrode having a second current collector, and a separator interposed between the first electrode and the second electrode. The first electrode, the second electrode, and the separator constitute a wound body having a columnar shape. The power storage device further includes a case having a cylindrical bottomed shape for accommodating the wound body, and a current collection plate electrically connected to the first electrode and the case. The first electrode has an overlapping region overlapping the current collection plate when viewed from a case axial direction and a non-overlapping region not overlapping the current collection plate when viewed from the axial direction. The first electrode and the current collection plate are electrically connected to each other in the overlapping region.

Abstract: An electrostatic image developing toner includes toner particles including a binder resin and vinyl resin particles. When a cross section of the toner particles is observed and the areas Sa [?m2] of Voronoi polygons obtained by Voronoi division of the cross section using geometric centers of the vinyl resin particles as generatrices are measured, Formulae (1) and (2) are satisfied: 0.03?Sac?0.20 (1), Ssd?0.10 (2), where Sac and Ssd represent the median [?m2] and the standard deviation [?m2] of the areas Sa of the Voronoi polygons, respectively.

Abstract: An ERW steel pipe for a mechanical structural part, the pipe including a straight pipe portion includes a base metal portion and an ERW portion, wherein the base metal portion has a chemical composition including, in terms of % by mass: 0.30 to 0.38% of C, 0.05 to 0.40% of Si, 0.50 to 2.00% of Mn, 0.010 to 0.060% of Al, 0.005 to 0.050% of Ti, and 0.0003 to 0.0050% of B, wherein a microstructure of a wall thickness central portion of the base metal portion is tempered martensite, wherein, a de-C layer in which a concentration of C is 90% or less with respect to the concentration of C in the chemical composition has a thickness of less than 0.20 mm, and a de-B layer in which a concentration of B is 90% or less with respect to the concentration of B in the chemical composition has a thickness of less than 0.10 mm, at each of inner and outer surface sides of the base metal portion, and wherein each of a Vickers hardness at a position at a depth of 0.

Abstract: A toner for developing an electrostatic charge image contains toner particles containing: a binder resin containing an amorphous resin and a crystalline resin; and resin particles. In differential scanning calorimetry, an endothermic peak temperature Tc of the crystalline resin is 60° C. or higher and 75° C. or lower, a ratio (Q1/Q2) of a heat absorption Q1 of the crystalline resin calculated by performing differential scanning calorimetry on the toner that has been melted at 150° C., then cooled to a temperature 10° C. lower than the endothermic peak temperature Tc, and then retained thereat for 1 minute, to a heat absorption Q2 of the crystalline resin calculated by performing differential scanning calorimetry on the toner that has been melted at 150° C., then cooled to a temperature 10° C. lower than the endothermic peak temperature Tc, and then retained thereat for 30 minutes is 0.15 or more. A maximum value of a loss coefficient tan ? at 50° C. or higher and 70° C. or lower is less than 1.2.

Abstract: A toner for developing an electrostatic charge image contains toner particles that contain a binder resin, resin particles, and a releasing agent, in which the toner has a loss coefficient tan ?(t) at 60° C. of less than 0.6, and, in cross sections of the toner particles, a proportion of an area of domains of the releasing agent present from surfaces of the toner particles to a depth of 1 ?m relative to a total area of domains of the releasing agent is 30% or more and 70% or less.

Abstract: An electrostatic image developing toner includes toner particles including a binder resin. When loss tangents tan ? at a temperature of 90° C. and a strain of 1%, a temperature of 90° C. and a strain of 50%, a temperature of 150° C. and a strain of 1%, and a temperature of 150° C. and a strain of 50%, the loss tangents tan ? being determined by measurement of dynamic viscoelasticity of the electrostatic image developing toner, are defined as D1(90), D50(90), D1(150), and D50(150), respectively, D1(90), D50(90), D1(150), and D50(150) are each 0.5 or more and 2.5 or less, D50(150)?D1(150) is less than 1.5, and D50(90)?D1(90) is less than 1.0; the toner particles further include resin particles; and the number average molecular weight of a component of the toner particles, the component being soluble in tetrahydrofuran, is 5000 or more and 15000 or less.

Abstract: A method for producing a toner for developing an electrostatic charge image includes preparing a dispersion that contains first resin particles; forming first aggregated particles at a pH of less than 7.0 by adding an aggregating agent to the dispersion so as to aggregate the first resin particles; forming second aggregated particles by adding second resin particles to the dispersion that has undergone the forming of the first aggregated particles so as to aggregate the second resin particles onto the first aggregated particles; adjusting a pH of the dispersion that has undergone the forming of the second aggregated particles to 7.0 or more so as to prepare a dispersion of aggregated particles in which aggregation of the resin particles has been terminated; adding an anionic surfactant to the dispersion having a pH adjusted to 7.

Abstract: A toner for developing an electrostatic charge image incorporates toner particles that contain binder resins including an amorphous polyester resin and a crystalline polyester resin, an ester-based release agent, and a polycondensate of a styrene-acrylic resin and a polyolefin resin. The polycondensate of styrene-acrylic and polyolefin resins has a storage modulus G?SP (70) at 70° C. of 1×104 Pa or more and 1×107 Pa or less and a storage modulus G?SP (90) at 90° C. of 1×103 Pa or more and 1×106 Pa or less in dynamic rheometry. The toner particles have a storage modulus G?T (70) at 70° C. of 1×104 Pa or more and 1×106 Pa or less and a storage modulus G?T (90) at 90° C. of 1×103 Pa or more and 1×105 Pa or less in dynamic rheometry.

Abstract: An electrostatic charge image developing toner contains toner particles that contain a binder resin, in which each of a loss modulus G?5 (150) of the electrostatic charge image developing toner determined by measuring dynamic viscoelasticity of the electrostatic charge image developing toner at a temperature of 150° C. and a strain of 5% and a loss modulus G?50 (180) of the electrostatic charge image developing toner determined by measuring dynamic viscoelasticity of the electrostatic charge image developing toner at a temperature of 180° C. and a strain of 50% is 1×103 Pa or more and 1×104 Pa or less, and a relationship between a loss modulus G?5 (t1) of the electrostatic charge image developing toner at a first temperature t1 in a temperature range of 150° C. or higher and 180° C. or lower and a strain of 5% and a loss modulus G?50 (t2) of the electrostatic charge image developing toner at a second temperature t2 higher than the first temperature t1 in the temperature range of 150° C. or higher and 180° C.

Abstract: An electrostatic charge image developing toner contains toner particles that contain a binder resin, in which in a case where G?1 (90) represents a storage modulus G? of the electrostatic charge image developing toner determined by measuring dynamic viscoelasticity of the electrostatic charge image developing toner at a temperature of 90° C. and a strain of 1%, G?50 (90) represents a storage modulus G? of the electrostatic charge image developing toner determined by measuring dynamic viscoelasticity of the electrostatic charge image developing toner at a temperature of 90° C. and a strain of 50%, and G?50 (180) represents a storage modulus G? of the electrostatic charge image developing toner determined by measuring dynamic viscoelasticity of the electrostatic charge image developing toner at a temperature of 180° C. and a strain of 50%, the electrostatic charge image developing toner satisfies the following Formulas (1) to (4).

Abstract: A toner for developing an electrostatic charge image incorporates toner particles that contain binder resins, in which: the binder resins include amorphous resins and at least one crystalline resin, the amorphous resins including amorphous resin a1 and amorphous resin a2, the crystalline resin including crystalline resin cl; and 10,000?Mw(a2)?Mw(a1)?150,000??(1), and |SP(a1)?SP(c1)|/|SP(a2)?SP(c1)|?0.9??(2), where Mw (al) is the weight-average molecular weight of amorphous resin a1, Mw (a2) is that of amorphous resin a2, SP (a1) is the solubility parameter (SP) of amorphous resin a1, SP (a2) is that of amorphous resin a2, and SP (c1) is that of crystalline resin c1.

Abstract: A toner for developing an electrostatic charge image contains toner particles containing an amorphous resin and a crystalline resin. The ratio Qs1/Qf1 is 1.1 or more and 2.0 or less, where Qf1 is the total area of all endothermic peaks detected during the first temperature rise when the toner particles are analyzed by differential scanning calorimetry after one-day storage under 50° C. conditions, and Qs1 is the total area of all endothermic peaks detected during the first temperature rise when classified toner particles are analyzed by differential scanning calorimetry after one-day storage under 50° C. conditions. The classified toner particles are a fraction of the toner particles in which toner particles having a diameter equal to or larger than the volume-average diameter D50v of the toner particles constitute 10% by number or less.

Abstract: A toner for developing an electrostatic charge image includes a binder resin. In dynamic viscoelasticity measurement, a storage modulus G?50T of the toner at 50° C. is 2×106 Pa or more and 3×108 Pa or less, a storage modulus G?100T of the toner at 100° C. is 1×104 Pa or more and 1×106 Pa or less, and tan ?T of the toner in an entire temperature range of 50° C. or more and 100° C. or less is 0.05 or more and 1.5 or less.

Abstract: An electrostatic charge image developing toner includes a polar group-containing olefin resin that is a polymer of a composition containing at least one nonpolar monomer unit (X) selected from the group consisting of ethylene and ?-olefin having 3 to 10 carbon atoms, a polar monomer unit (Y) having at least one of a maleic acid group and a maleic anhydride group, and a monomer unit (Z) having a polymerizability to at least one of the nonpolar monomer unit (X) and the polar monomer unit (Y), in which an acid value of the toner is 10 mgKOH/g to 60 mgKOH/g.

Abstract: An electrostatic charge image developing toner includes a continuous phase containing a binder resin (i); and a discontinuous phase that has a core containing a binder resin (ii) and a coating layer covering the core and containing a binder resin (iii), and is dispersed in the continuous phase.

Abstract: A toner for developing an electrostatic charge image includes a binder resin. In dynamic viscoelasticity measurement, a storage modulus G?50T of the toner at 50° C. is 2×106 Pa or more and 3×108 Pa or less, a storage modulus G?100T of the toner at 100° C. is 1×104 Pa or more and 1×106 Pa or less, and tan ?T of the toner in an entire temperature range of 50° C. or more and 100° C. or less is 0.05 or more and 1.5 or less.

Abstract: An electrostatic charge image developing toner includes a polar group-containing olefin resin that is a polymer of a composition containing at least one nonpolar monomer unit (X) selected from the group consisting of ethylene and ?-olefin having 3 to 10 carbon atoms, a polar monomer unit (Y) having at least one of a maleic acid group and a maleic anhydride group, and a monomer unit (Z) having a polymerizability to at least one of the nonpolar monomer unit (X) and the polar monomer unit (Y), in which an acid value of the toner is 10 mgKOH/g to 60 mgKOH/g.

Abstract: An electrostatic charge image developing toner includes a continuous phase containing a binder resin (i); and a discontinuous phase that has a core containing a binder resin (ii) and a coating layer covering the core and containing a binder resin (iii), and is dispersed in the continuous phase.

Abstract: A white toner for electrostatic image development includes toner particles containing a binder resin, which contains at least a crystalline polyester resin and an amorphous polyester resin, and a white pigment. The loss tangent tan ? at 30° C. determined by dynamic viscoelasticity measurement is 0.2 or more and 1.0 or less.

Abstract: A toner set includes a white toner that includes white toner particles containing white colored particles, and at least one selected from a color toner that includes color toner particles containing colored particles and a transparent toner that includes transparent toner particles, wherein an average circularity of the white toner particles is smaller than an average circularity of either the color toner particles or the transparent toner particles and a small-diameter-side number particle diameter distribution index of the white toner particles is greater than a small-diameter-side number particle diameter distribution index of either the color toner particles or the transparent toner particles.