Toner
Provided is a toner comprising: a toner particle containing a binder resin; and an organic silicon polymer particle on a surface of the toner particle, wherein the binder resin contains a crystalline resin, and when the toner particle is pelletized and a Young's modulus of the toner measured in a micro compression test at 25° C. is represented by TE (MPa) and when one organic silicon polymer particle is separated from the toner and a Young's modulus of the one organic silicon polymer particle measured in a micro compression test at 25° C. is represented by SiE (MPa), TE and SiE satisfies 800≤TE≤2500 and 1.5≤SiE/TE≤10.0.
1. A toner, comprising:
a toner particle containing a binder resin, the binder resin containing a crystalline resin; and
an organic silicon polymer particle on a surface of the toner particle, wherein
800≤TE≤2500 and 1.5≤SiE/TE≤10.0
when TE (MPa) is a Young's modulus measured with a micro compression tester at 25° C. using a test piece obtained by pelletizing the toner and SiE (MPa) is a Young's modulus measured with the micro compression tester at 25° C. using the organic silicon polymer particle separated from the toner, and
0.20≤S4/SA≤0.60, 0.00≤S3/SA≤0.50 and 0.20≤S2/SA≤0.70
when SA is a total peak area derived from an organic silicon polymer in a measurement of 29 Si-NMR using the organic silicon polymer particle as a specimen, S4 is a peak area derived from a Q unit structure, S3 is a peak area derived from a T unit structure, and S2 is a peak area derived from a D unit structure.
2. The toner according to claim 1 , wherein a content of the crystalline resin is 50 mass % or more based on the binder resin.
3. The toner according to claim 1 , wherein a content of the organic silicon polymer particle is 0.5 to 20 parts by mass with respect to 100 parts by mass of the toner particle.
4. The toner according to claim 1 , wherein the toner has a diffraction peak in a range in which a diffraction angle 2θ is 20.0 to 22.0° in an X-ray diffraction spectrum using a CuKα line.
5. The toner according to claim 1 , wherein the crystalline resin includes a monomer unit represented by formula (1)
where R Z1 represents a hydrogen atom or a methyl group and R 1 represents an alkyl group having 18 to 36 carbon atoms, and
a proportion of the monomer unit is 30.0 mass % or more based on a mass of the crystalline resin.
6. The toner according to claim 1 , wherein the toner particle includes an amorphous resin,
a domain of the amorphous resin is observed in a cross section of the toner particle observed with a transmission electron microscope, and
a number-average particle diameter of the domain present in the cross section within a range of 800 nm from a surface of the toner particle is 20 to 500 nm.
7. The toner according to claim 1 , wherein an average circularity of the toner particle is 0.930 to 0.980.