Toner for developing electrostatic charge image, electrostatic charge image developer, and toner cartridge
A toner for developing an electrostatic charge image includes a binder resin. In dynamic viscoelasticity measurement, a storage modulus G′ 50T of the toner at 50° C. is 2×10 6 Pa or more and 3×10 8 Pa or less, a storage modulus G′ 100T of the toner at 100° C. is 1×10 4 Pa or more and 1×10 6 Pa or less, and tan δ T of the toner in an entire temperature range of 50° C. or more and 100° C. or less is 0.05 or more and 1.5 or less.
1. A toner for developing an electrostatic charge image, the toner comprising a binder resin,
wherein:
in dynamic viscoelasticity measurement,
a storage modulus G′ 50T of the toner at 50° C. is 2×10 6 Pa or more and 3×10 8 Pa or less,
a storage modulus G′ 100T of the toner at 100° C. is 1×10 4 Pa or more and 1×10 6 Pa or less, and
tan δ T of the toner in an entire temperature range of 50° C. or more and 100° C. or less is 0.05 or more and 1.5 or less.
2. The toner according to claim 1 , wherein:
the binder resin includes a crystalline resin A, an amorphous resin B1, and an amorphous resin B2;
in dynamic viscoelasticity measurement,
tan δ B2 of the amorphous resin B2 in the entire temperature range of 50° C. or more and 100° C. or less is less than 1, and
a storage modulus G′ 50-100B2 of the amorphous resin B2 in the entire temperature range of 50° C. or more and 100° C. or less is 1×10 3 Pa or more and 1×10 7 Pa or less; and
a tetrahydrofuran insoluble fraction content of the amorphous resin B2 is 90 mass % or more and 100 mass % or less.
3. The toner according to claim 2 , wherein:
in dynamic viscoelasticity measurement,
a storage modulus G′ 50R of materials contained in the toner other than the amorphous resin B2 at 50° C. is 3×10 6 Pa or more and 9×10 8 Pa or less, and
a storage modulus G′ 100R of the materials contained in the toner other than the amorphous resin B2 at 100° C. is 1×10 3 Pa or more and 1×10 5 Pa or less.
4. The toner according to claim 2 , wherein the crystalline resin A is a crystalline polyester resin, and the amorphous resin B1 is an amorphous polyester resin.
5. An electrostatic charge image developer comprising the toner for developing an electrostatic charge image according to claim 1 .
6. A toner cartridge detachably attachable to an image forming apparatus, the toner cartridge comprising the toner for developing an electrostatic charge image according to claim 1 .