Toner
A toner comprising a toner particle containing a resin component, wherein the resin component contains an amorphous polyester and a crystalline polyester, and in depth profile measurement of secondary ions on the toner particle surface by TOF-SIMS, given Ia(t) as the intensity of secondary ions derived from the amorphous polyester, Ic(t) as the intensity of secondary ions derived from the crystalline polyester, and I(t) as the total detected intensity of secondary ions derived from resin contained in the toner particle at a depth of t (nm) from the toner particle surface, the following formulae are satisfied within the range of 0≤t≤10: Ia ( t )> Ic ( t )>0.0000 ( Ia ( t )+ Ic ( t ))/ I ( t )≥0.80 and there is only one point of intersection between the depth profile curve of Ia(t) and Ic(t) within the range of 10≤t≤30.
1. A toner comprising a toner particle that contains a resin component, wherein
the resin component contains an amorphous polyester and a crystalline polyester, and
in depth profile measurement of secondary ions on the toner particle surface by time-of-flight secondary ion mass spectrometry TOF-SIMS, given Ia(t) as the intensity of secondary ions derived from the amorphous polyester, Ic(t) as the intensity of secondary ions derived from the crystalline polyester, and I(t) as the total detected intensity of secondary ions derived from resin contained in the toner particle at a depth of t (nm) from the toner particle surface, the following formulae (1) and (2) are satisfied within the range of 0≤t≤10:
Ia ( t )> Ic ( t )>0.0000 (1)
( Ia ( t )+ Ic ( t ))/ I ( t )≥0.80 (2)
and there is only one point of intersection between the depth profile curve of Ia(t) and the depth profile curve of Ic(t) within the range of 10<t≤30.
2. The toner according to claim 1 , wherein in depth profile measurement of secondary ions on the toner particle surface, given Ic(0) as the intensity of secondary ions derived from the crystalline polyester at t=0 and I(0) as the total detected intensity of secondary ions derived from resin contained in the toner particle at t=0, the following formula (3) is satisfied:
0.10≤ Ic (0)/ I (0)≤0.40 (3).
3. The toner according to claim 1 , wherein in depth profile measurement of secondary ions on the toner particle surface, given Ic(30) as the intensity of the secondary ions derived from the crystalline polyester at t=30 and I(30) as the total detected intensity of secondary ions derived from resin contained in the toner particle at t=30, the following formula (4) is satisfied:
0.40< Ic (30)/ I (30)≤0.90 (4).
4. The toner according to claim 1 , wherein Ic(t) satisfies the following formula (5) within the range of 0≤t≤10:
0.0100≤ Ic ( t )≤0.0350 (5).
5. The toner according to claim 1 , wherein the resin component contains a styrene acrylic resin.
6. The toner according to claim 5 , wherein the content ratio of the styrene acrylic resin in the resin component is from 50 mass % to 99 mass %.
7. The toner according to claim 5 , wherein in depth profile measurement of secondary ions on the toner particle surface by time-of-flight secondary ion mass spectrometry TOF-SIMS, given Is(t) as the intensity of the secondary ions derived from the styrene acrylic resin at a depth of t (nm) from the toner particle surface, formula (6) below is satisfied within the range of 0≤t≤30:
Ic ( t )> Is ( t ) (6).
8. The toner according to claim 5 , wherein in depth profile measurement of secondary ions on the toner particle surface by time-of-flight secondary ion mass spectrometry TOF-SIMS, given Is(t) as the intensity of the secondary ions derived from the styrene acrylic resin at a depth of t (nm) from the toner particle surface, formula (7) below is satisfied within the range of 30<t≤60:
0.10≤ Is ( t )/ I ( t )≤0.50 (7).
9. The toner according to claim 1 , wherein given SP1 (cal/cm 3 ) 1/2 as the SP value of the crystalline polyester and SP2 (cal/cm 3 ) 1/2 as the SP value of the amorphous polyester, SP2-SP1 is from 3.00 to 3.70.
10. The toner according to claim 1 , wherein the SP value (cal/cm 3 ) 1/2 of the amorphous polyester is from 12.40 to 12.90.
11. The toner according to claim 1 , wherein the amorphous polyester is a condensation polymer of a dicarboxylic acid component and a dialcohol component containing a bisphenol A alkylene oxide adduct with an average of from 3.0 to 5.0 added moles of an alkylene oxide, and the alkylene oxide is selected from ethylene oxide and propylene oxide.
12. The toner according to claim 1 , wherein the weight-average molecular weight of the crystalline polyester is from 3000 to 50000.
13. The toner according to claim 1 , wherein the weight-average particle diameter D4 of the toner particle is from 4.00 μm to 15.00 μm.
14. The toner according to claim 1 , wherein the crystalline polyester is a condensation polymer of monomers include a linear aliphatic dicarboxylic acid and a linear aliphatic diol.
15. The toner according to claim 1 , wherein the toner particle is a suspension polymerized toner particle.