JP2010079242A5 - - Google Patents

Claims (13)

In a toner having a toner particle containing at least a binder resin and a colorant and a fatty acid metal salt,
The fatty acid metal salt is composed of particles having a median diameter (D50s) on a volume basis of 0.15 μm or more and 0.65 μm or less,
The toner is characterized in that the fatty acid metal salt liberation rate is 1.0% or more and 25.0% or less.   The toner according to claim 1, wherein the toner particles contain a wax component. The toner has a number average particle diameter (D1) of 3.0 μm or more and 8.0 μm or less,
In the micro-compression test for the toner, the maximum displacement rate of the particles when a load of 9.8 × 10 ⁻⁴ N is applied to one particle of the toner at a load speed of 9.8 × 10 ⁻⁵ N / sec is R ₁₀₀ , When the displacement rate of the particles at a load of 2.0 × 10 ⁻⁴ N is R ₂₀ ,
0.20 ≦ R ₁₀₀ ≦ 0.90
0.010 ≦ R ₂₀ ≦ 0.080
The toner according to claim 1, wherein the toner is a toner. In the micro compression test for the toner,
0.40 ≦ R ₁₀₀ ≦ 0.80
0.020 ≦ R ₂₀ ≦ 0.060
The toner according to claim 3, wherein:   5. The toner according to claim 1, wherein the toner has a viscosity at 100 ° C. of 8000 Pa · s or more and 65000 Pa · s or less.   The toner according to claim 1, wherein the fatty acid metal salt is fatty acid zinc or fatty acid calcium.   The toner according to claim 1, wherein the fatty acid metal salt is a metal salt of a fatty acid having 12 to 22 carbon atoms.   The toner according to claim 7, wherein the fatty acid metal salt is a stearic acid metal salt.   The toner according to claim 1, wherein the fatty acid metal salt has a free fatty acid content of 0.20 mass% or less.   10. The toner according to claim 1, wherein the content of the fatty acid metal salt is 0.02 parts by mass or more and 0.50 parts by mass or less with respect to 100 parts by mass of the toner particles.   11. The toner according to claim 1, wherein a median diameter (D50s) of the fatty acid metal salt on a volume basis is 0.30 μm or more and 0.60 μm or less.   The toner according to claim 1, wherein a liberation rate of the fatty acid metal salt is 2.0% or more and 20.0% or less.   13. The toner according to claim 1, wherein the toner has an average circularity of 0.940 or more and 0.990 or less as measured by a flow type particle image analyzer.