Toner for electrostatic image development, electrostatic image developer, and toner cartridge
A toner for electrostatic image development contains toner particles containing a binder resin. The binder resin includes an amorphous resin and a crystalline resin. In the toner particles, a Net intensity of elemental Mg measured by X-ray fluorescence analysis is from 0.02 to 0.15 inclusive, and a Net intensity of elemental Cl measured by X-ray fluorescence analysis is from 0.02 to 0.60 inclusive.
1. A toner for electrostatic image development comprising toner particles containing a binder resin,
wherein the binder resin includes an amorphous resin and a crystalline resin, and
wherein, in the toner particles, a Net intensity of elemental Mg measured by X-ray fluorescence analysis is from 0.02 to 0.15 inclusive, and a Net intensity of elemental Cl measured by X-ray fluorescence analysis is from 0.02 to 0.60 inclusive.
2. The toner for electrostatic image development according to claim 1 , wherein the Net intensity of the elemental Mg is from 0.03 to 0.12 inclusive, and the Net intensity of the elemental Cl is from 0.03 to 0.40 inclusive.
3. The toner for electrostatic image development according to claim 1 , wherein the crystalline resin includes a polymer of α,ω-linear aliphatic dicarboxylic acid and α,ω-linear aliphatic diol.
4. The toner for electrostatic image development according to claim 3 , wherein the polymer of the α,ω-linear aliphatic dicarboxylic acid and the α,ω-linear aliphatic diol includes a polymer of 1,10-decanedicarboxylic acid and 1,6-hexanediol.
5. The toner for electrostatic image development according to claim 1 , wherein the toner particles include first toner particles in which, when a cross section of each of the first toner particles is observed, at least two domains of the crystalline resin satisfy conditions (A), (B1), (C), and (D) below:
condition (A): an aspect ratio of each of the at least two domains of the crystalline resin is from 5 to 40 inclusive;
condition (B1): a length of a major axis of each of the at least two domains of the crystalline resin is from 0.5 μm to 1.5 μm inclusive;
condition (C): an angle between an extension of the major axis of each of the at least two domains of the crystalline resin and a tangent at a point of contact of the extension with the surface of the each of the first toner particles is from 60 degrees to 90 degrees inclusive; and
condition (D): a crossing angle between extensions of major axes of any two of the at least two domains of the crystalline resin is from 45 degrees to 90 degrees inclusive.
6. The toner for electrostatic image development according to claim 5 , wherein a ratio of a number of first toner particles to a total number of toner particles is 40% by number or more.
7. The toner for electrostatic image development according to claim 6 , wherein the ratio of the number of first toner particles to the total number of toner particles is 70% by number or more.
8. The toner for electrostatic image development according to claim 1 , wherein the toner particles include second toner particles in which, when a cross section of each of the second toner particles is observed, at least two domains of the crystalline resin satisfy conditions (A), (B2), (C), and (D) below:
condition (A): an aspect ratio of each of the at least two domains of the crystalline resin is from 5 to 40 inclusive;
condition (B2): in at least one of the at least two domains of the crystalline resin, a ratio of the length of a major axis to a maximum diameter of the each of the second toner particles is from 10% to 30% inclusive;
condition (C): an angle between an extension of a major axis of each of the at least two domains of the crystalline resin and a tangent at a point of contact of the extension with the surface of the each of the second toner particles is from 60 degrees to 90 degrees inclusive; and
condition (D): a crossing angle between extensions of major axes of any two of the at least two domains of the crystalline resin is from 45 degrees to 90 degrees inclusive.
9. The toner for electrostatic image development according to claim 1 , wherein the toner particles contain a release agent, and
wherein the release agent is an ester wax.
10. The toner for electrostatic image development according to claim 9 , wherein, when a cross section of each of the toner particles is observed, a domain of the release agent is present at a depth of 50 nm or more from the surface of the each of the toner particles.
11. An electrostatic image developer comprising the toner for electrostatic image development according to claim 1 .
12. A toner cartridge containing the toner for electrostatic image development according to claim 1 , wherein the toner cartridge is detachably attached to an image forming apparatus.