Abstract: A toner includes a toner particle containing a binder resin containing a crystalline polyester. In differential scanning calorimetry (DSC), the toner is heated to 180° C. at a rate of 10° C./min, then cooled to 25° C. at a rate of 10° C./min and successively from 25° C. to 15° C. at a rate of 3° C./min, and heated again to 180° C. at a rate of 10° C./min. As a result, an exothermic amount P1 when the toner is cooled from 80° C. to 40° C. is 1.00 J/g or less, an exothermic amount P2 when the toner is cooled from 25° C. to 15° C. is 0.10 J/g or more, and when a sum of endothermic amounts P3 (J/g) when the toner is heated again from 40° C. to 180° C. and a sum of exothermic amounts P4 (J/g) when the toner is cooled from 180° C. to 40° C. satisfies 2.0?P3-P4?10.0.

Abstract: A toner, comprising a toner particle comprising a binder resin, wherein the binder resin comprises an amorphous polyester and a crystalline polyester; (i) a weight-average molecular weight of a soluble matter of the crystalline polyester in o-dichlorobenzene at 100° C. is 1500 to 4900; (ii) the crystalline polyester comprises a modified crystalline polyester having at least one terminal-modified structure selected from among a structure in which a hydroxy group at a main chain terminal of the crystalline polyester is terminal-modified with a C16 to C31 aliphatic monocarboxylic acid, and a structure in which a carboxy group at a main chain terminal of the crystalline polyester is terminal-modified with a C15 to C30 aliphatic monoalcohol; and (iii) a content ratio of the terminal-modified structure in the crystalline polyester is 80.0 mol % or higher.

Abstract: A toner includes a toner particle containing a binder resin and a release agent. The binder resin contains an amorphous resin and a crystalline resin, and a content of the crystalline resin is 1.0 to 20.0% by mass based on a mass of the binder resin. In a cross-section of the toner particle observed by scanning transmission electron microscopy, (i) there exists a matrix A of the amorphous resin with domains A of the release agent dispersed therein, (ii) domains A each include a matrix B of the release agent having domains B of the crystalline resin dispersed therein, and (iii) domains A each being covered with the crystalline resin having an average coverage of the domains A by the crystalline resin of 70% or more.

Abstract: The toner comprises a toner particle that contains a binder resin, a polymer C, and a pigment, wherein at least a portion of the polymer C is bonded with at least a portion of the pigment; in solid-state NMR measurement at 60° C. using as a sample, a solid fraction collected according to a prescribed procedure in which the toner is dissolved in chloroform, transverse relaxation time T2 of a peak observed at 1.5 ppm to 2.5 ppm is 1.0 ms to 50.0 ms; and using a SPA (J/cm3)0.5 for a SP value of the binder resin and a SPB (J/cm3)0.5 for a SP value of the polymer C, the SPA and the SPB satisfy a following formula (1). 1.0?SPA?SPB?2.

Abstract: A toner comprising a toner particle comprising a binder resin, wherein the binder resin comprises an amorphous polyester A and a crystalline polyester C; the amorphous polyester A has an amorphous polyester segment a1 and a2; the amorphous polyester segment a2 has a monomer unit of a specific alcohol a0; the crystalline polyester C is a polymer having a crystalline polyester segment c2 and a crystalline segment c1 bonded to the end of the crystalline polyester segment c2; the crystalline polyester segment c2 has a monomer unit of a specific alcohol b0; an absolute value of a difference between a carbon number of the linear aliphatic polyhydric alcohol a0 and a carbon number of the linear aliphatic polyhydric alcohol b0 is 4 or less; and SP values of the polyester segment a1 and a2, and the crystalline segment c1 and the crystalline polyester segment c2 satisfy specific relationships.

Abstract: A toner including a toner particle containing a binder resin containing an amorphous polyester A and a crystalline polyester C, and a wax, and a silica fine particle, wherein the content of the crystalline polyester C is within a specific range, the softening point of the amorphous polyester A satisfies a specific relationship, and in an X-ray diffraction spectrum under a specific temperature condition for the toner, there is a peak corresponding to the crystalline polyester C, a wax index AW1 and a crystalline polyester index AC1 of the toner satisfy a specific relationship, the silica fine particle contains a silica fine particle A having a maximum diameter of primary particle in a specific range, and the average coverages of the surface of the toner before and after the toner is treated with hexane with the silica fine particle A satisfy a specific relationship.

Abstract: A toner, comprising a toner particle comprising a binder resin and a water-soluble polyvalent metal salt, wherein a main component of the binder resin is a polyester resin having specific acid value, the water-soluble polyvalent metal salt is a chloride, nitrate or sulfate of the specific metal, the water-soluble polyvalent metal salt has a solubility in water at 25° C. of 30 to 200 g/100 mL, in a cross-sectional observation of the toner particle, a proportion of the area of domains having a concrete surface area, relative to the total area of domains derived from the water-soluble polyvalent metal salt, is 80 to 100 area %, the expression below is satisfied, where At (area %) denotes the proportion of the total area of domains and Fm (atomic %) denotes the proportion of the polyvalent metal atom relative to the atoms in the toner as detected by X-ray fluorescence analysis. 0.02?At/Fm?0.

Abstract: A toner comprising: a toner particle comprising a binder resin, a release agent, and a graft polymer (A), wherein the binder resin comprises an amorphous polyester, the graft polymer (A) has two or more exothermic peaks measured by differential scanning calorimetric measurement, the release agent has at least one exothermic peak, and when, among exothermic peaks of the graft polymer (A), a peak temperature of a highest temperature-side exothermic peak is indicated by TMax (° C.), a peak temperature of a lowest temperature-side exothermic peak is indicated by TMin (° C.), and, among exothermic peaks of the release agent, a peak temperature of a maximum exothermic peak is indicated by TWax (° C.), TMax, TMin and TWax satisfy relationships of formulae (1) and (2) below: 5. ? T Max - T Min ? 20. , and ( 1 ) 10. ? T Wax - T Max ? 40. .

Abstract: A toner is provided, which has a toner particle that contains a binder resin which contains an amorphous resin A and a crystalline polyester C, wherein the amorphous resin A and the crystalline polyester C each has a structure of a specific straight-chain aliphatic polyhydric alcohol, the amorphous resin A has a structure in which a polyester is crosslinked with a vinyl polymer, and the melting point of the crystalline polyester C and the weight-average molecular weight of the amorphous resin A lie within respective specific ranges.

Abstract: Provided is a toner containing a binder resin, wherein the binder resin contains an amorphous polyester and a crystalline polyester, and wherein, when the toner is used as a sample in differential scanning calorimetry (DSC) involving a first process of increasing a temperature from 20° C. to 180° C., a second process of decreasing the temperature from 180° C. to 20° C., and a third process of increasing the temperature from 20° C. to 180° C., DSC curves have a specific endothermic peak or exothermic peak derived from the crystalline polyester, and when a temperature of a maximum peak top of the endothermic peak in the DSC curve obtained through the first process is represented by T1 (° C.), and a temperature of a maximum peak top of the endothermic peak in the third DSC curve is represented by T2 (° C.), the Tl and the T2 satisfy the following expression (1). - 1.

Abstract: A toner includes a toner particle containing a binder resin containing a crystalline polyester. In differential scanning calorimetry (DSC), the toner is heated to 180° C. at a rate of 10° C./min, then cooled to 25° C. at a rate of 10° C./min and successively from 25° C. to 15° C. at a rate of 3° C./min, and heated again to 180° C. at a rate of 10° C./min. As a result, an exothermic amount P1 when the toner is cooled from 80° C. to 40° C. is 1.00 J/g or less, an exothermic amount P2 when the toner is cooled from 25° C. to 15° C. is 0.10 J/g or more, and when a sum of endothermic amounts P3 (J/g) when the toner is heated again from 40° C. to 180° C. and a sum of exothermic amounts P4 (J/g) when the toner is cooled from 180° C. to 40° C. satisfies 2.0 ? P3-P4 ? 10.0.

Abstract: The toner comprises a toner particle that contains a binder resin, a polymer C, and a pigment, wherein at least a portion of the polymer C is bonded with at least a portion of the pigment; in solid-state NMR measurement at 60° C. using as a sample, a solid fraction collected according to a prescribed procedure in which the toner is dissolved in chloroform, transverse relaxation time T2 of a peak observed at 1.5 ppm to 2.5 ppm is 1.0 ms to 50.0 ms; and using a SPA (J/cm3)0.5 for a SP value of the binder resin and a SPB (J/cm3)0.5 for a SP value of the polymer C, the SPA and the SPB satisfy a following formula (1). 1.0?SPA?SPB?2.

Abstract: A toner including a toner particle containing a binder resin containing an amorphous polyester A and a crystalline polyester C, and a wax, and a silica fine particle, wherein the content of the crystalline polyester C is within a specific range, the softening point of the amorphous polyester A satisfies a specific relationship, and in an X-ray diffraction spectrum under a specific temperature condition for the toner, there is a peak corresponding to the crystalline polyester C, a wax index AW1 and a crystalline polyester index AC1 of the toner satisfy a specific relationship, the silica fine particle contains a silica fine particle A having a maximum diameter of primary particle in a specific range, and the average coverages of the surface of the toner before and after the toner is treated with hexane with the silica fine particle A satisfy a specific relationship.

Abstract: A toner comprising a toner particle comprising a binder resin, wherein the binder resin comprises an amorphous polyester A and a crystalline polyester C; the amorphous polyester A has an amorphous polyester segment a1 and a2; the amorphous polyester segment a2 has a monomer unit of a specific alcohol a0; the crystalline polyester C is a polymer having a crystalline polyester segment c2 and a crystalline segment c1 bonded to the end of the crystalline polyester segment c2; the crystalline polyester segment c2 has a monomer unit of a specific alcohol b0; an absolute value of a difference between a carbon number of the linear aliphatic polyhydric alcohol a0 and a carbon number of the linear aliphatic polyhydric alcohol b0 is 4 or less; and SP values of the polyester segment a1 and a2, and the crystalline segment c1 and the crystalline polyester segment c2 satisfy specific relationships.

Abstract: The present invention provides a toner including a toner particle containing a binder resin and a release agent. The binder resin contains an amorphous resin and a crystalline resin, and a content of the crystalline resin is 1.0% to 20.0% by mass based on a mass of the binder resin. In a cross-section of the toner particle observed by scanning transmission electron microscopy, (i) there exist a matrix A of the amorphous resin and domains A of the release agent dispersed in the matrix A, (ii) the domains A each include a matrix B of the release agent and domains B of the crystalline resin dispersed in the matrix B, and (iii) the domains A are each covered with the crystalline resin and an average coverage of the domains A by the crystalline resin is 70% or more.

Abstract: A toner, comprising a toner particle comprising a binder resin and a water-soluble polyvalent metal salt, wherein a main component of the binder resin is a polyester resin having specific acid value, the water-soluble polyvalent metal salt is a chloride, nitrate or sulfate of the specific metal, the water-soluble polyvalent metal salt has a solubility in water at 25° C. of 30 to 200 g/100 mL, in a cross-sectional observation of the toner particle, a proportion of the area of domains having a concrete surface area, relative to the total area of domains derived from the water-soluble polyvalent metal salt, is 80 to 100 area %, the expression below is satisfied, where At (area %) denotes the proportion of the total area of domains and Fm (atomic %) denotes the proportion of the polyvalent metal atom relative to the atoms in the toner as detected by X-ray fluorescence analysis. 0.02?At/Fm?0.

Abstract: A toner, comprising a toner particle comprising a binder resin, wherein the binder resin comprises an amorphous polyester and a crystalline polyester; (i) a weight-average molecular weight of a soluble matter of the crystalline polyester in o-dichlorobenzene at 100° C. is 1500 to 4900; (ii) the crystalline polyester comprises a modified crystalline polyester having at least one terminal-modified structure selected from among a structure in which a hydroxy group at a main chain terminal of the crystalline polyester is terminal-modified with a C16 to C31 aliphatic monocarboxylic acid, and a structure in which a carboxy group at a main chain terminal of the crystalline polyester is terminal-modified with a C15 to C30 aliphatic monoalcohol; and (iii) a content ratio of the terminal-modified structure in the crystalline polyester is 80.0 mol % or higher.