Toner
A toner including a toner particle which contains: a resin component containing a binder resin; and an inorganic fine particle, the inorganic fine particle is at least one inorganic fine particle selected from the group consisting of (i) a particle containing CaCO 3 , (ii) a particle containing BaSO 4 , (iii) a particle containing Mg 3 Si 4 O 10 (OH) 2 , and (iv) a particle containing Al 2 Si 2 O 5 (OH) 4 , a number average particle diameter Dc of a primary particle of the inorganic fine particle is 100 nm or more and 1000 nm or less, when a cross section of the toner particle is observed, an inorganic fine particle domain A having a dispersion diameter of 2.0 times or more of Dc is present in the cross section, and the inorganic fine particle and the inorganic fine particle domain A occupy a specific percentage of an area in the cross section of the toner particle.
1 . A toner, comprising:
a toner particle containing a resin component and an inorganic fine particle;
the resin component containing a binder resin and a crystalline polyester resin;
a content of the crystalline polyester resin in the toner particle being 0.5 to 10.0 mass %; and
the inorganic fine particle being at least one member selected from the group consisting of a particle containing Mg 3 Si 4 O 10 (OH) 2 and a particle containing Al 2 Si 2 O 5 (OH) 4 , wherein
Dc is 100-1000 nm when Dc is a number average particle diameter of a primary particle of the inorganic fine particle,
an inorganic fine particle domain A having a dispersion diameter of at least 2.0 times Dc is present in a cross section of the toner particle, and
1.0≤ ST/S× 100≤20.0 and 0.5≤ SA/S× 100≤10.0
when S is an area of the cross section of the toner particle, ST is a sum of areas occupied by the inorganic fine particle in the cross section, and SA is a sum of areas occupied by the inorganic fine particle domain A in the cross section.
2 . The toner according to claim 1 , wherein an inorganic fine particle domain B having a dispersion diameter of at least 3.0 times Dc is present in the cross section, and
0.5≤SB/S×100≤10.0 when SB is a sum of areas occupied by the inorganic fine particle domain B in the cross section.
3 . The toner according to claim 2 , wherein
2.0≤ ST/S× 100≤10.0
0.5≤ SA/S× 100≤5.0 and
0.5≤ SB/S× 100≤5.0.
4 . The toner according to claim 1 , wherein Dd is 200-1500 nm when Dd is a number average value of a dispersion diameter of the inorganic fine particle in the cross section.
5 . The toner according to claim 1 , wherein Ddmax/Dd≤5.0 when Ddmax is a maximum value of a dispersion diameter of the inorganic fine particle in the cross section.
6 . The toner according to claim 1 , wherein Da/Dc≤1.5 when Da is an area average particle diameter of a primary particle of the inorganic fine particle.
7 . The toner according to claim 1 , wherein Dc is 200 to 800 nm.
8 . The toner according to claim 1 , wherein the resin component has an ester group, and
0.5≤Mr×(Er/100)/Mc≤3.0 when Mr (mass %) is a content ratio of the resin component contained in the toner particle, Er (mass %) is a content ratio of an ester group in the resin component, and Mc (mass %) is a content ratio of the inorganic fine particle contained in the toner particle.
9 . The toner according to claim 1 , wherein the toner particle further contains a colorant, and
0.5≤SC/SP×100≤5.0 when SP is a sum of areas occupied by the colorant in the cross section and SC is a sum of areas occupied by the colorant in the inorganic fine particle domain A.
10 . A method of producing a toner, comprising a toner particle containing a resin component and an inorganic fine particle;
the resin component containing a binder resin and a crystalline polyester resin;
the binder resin comprising a binder resin A and a binder resin B;
a content of the crystalline polyester resin in the toner particle being 0.5 to 10.0 mass %; and
the inorganic fine particle being at least one member selected from the group consisting of a particle containing Mg 3 Si 4 O 10 (OH) 2 and a particle containing Al 2 Si 2 O 5 (OH) 4 , wherein
Dc is 100-1000 nm when Dc is a number average particle diameter of a primary particle of the inorganic fine particle
an inorganic fine particle domain A having a dispersion diameter of at least 2.0 times Dc is present in a cross section of the toner particle, and
1.0≤ ST/S× 100≤20.0 and 0.5≤ SA/S× 100≤10.0
when S is an area of the cross section of the toner particle, ST is a sum of areas occupied by the inorganic fine particle in the cross section, and SA is a sum of areas occupied by the inorganic fine particle domain A in the cross section,
the method comprising the steps of:
an inorganic fine particle pre-kneading step of melt-kneading a mixture containing binder resin A and the inorganic fine particle to obtain an inorganic fine particle mixture; and
a kneading step of melt-kneading a mixture containing the inorganic fine particle mixture and binder resin B.