Toner, developing agent container, image forming unit, and image forming apparatus
View Patent ↗Provided are a toner, and a developing agent container, an image forming unit and an image forming apparatus including the toner. The toner includes a toner particle. The toner particle includes at least one brilliant pigment particle, binder resin containing the brilliant pigment particle, and a parting agent dispersed in the binder resin, wherein a hydrophobicity degree of the brilliant pigment particle is in a range from 61.2 to 92.7.
1. A toner comprising a toner particle, the toner particle including:
at least one brilliant pigment particle;
binder resin containing the brilliant pigment particle; and
a parting agent dispersed in the binder resin,
wherein a hydrophobicity degree of the brilliant pigment particle is in a range from 61.2 to 92.7.
2. The toner according to claim 1 , wherein an average maximum length of the at least one brilliant pigment particle is in a range from 5 μm to 20 μm.
3. The toner according to claim 1 , wherein the hydrophobicity degree HD is obtained by an expression
HD
=
(
Methanol
weight
after
evaluation
)
(
Methanol
weight
after
evaluation
)
+
(
Weight
of
added
pure
water
)
×
100
where the weight of added pure water represents weight of the pure water added to the brilliant pigment particles from a start of addition of the pure water to a stoppage of the addition, and
the methanol weight after evaluation represents methanol weight at a point when the brilliant pigment particles as solid matter precipitates at a surface of solution including the pure water and the methanol.
4. A developing agent container comprising:
the toner according to claim 1 ; and
a container part that stores the toner.
5. An image forming unit comprising:
the toner according to claim 1 ; and
a development device that stores the toner and supplies the toner to an image bearing body on which an electrostatic latent image is formed.
6. An image forming apparatus comprising:
the image forming unit according to claim 5 ;
an image transfer section that transfers a toner image formed on the image bearing body in the image forming unit onto a record medium; and
a fixation section that fixes the transferred toner image.
7. The toner according to claim 1 , wherein the binder resin contains the brilliant pigment particle as an internal additive particle.
8. A toner comprising a toner particle, the toner particle including:
at least one internal additive particle;
binder resin containing the internal additive particle; and
a parting agent dispersed in the binder resin,
wherein a hydrophobicity degree of the internal additive particle is in a range from 61.2 to 92.7.
9. The toner according to claim 8 , wherein an average maximum length of the at least one internal additive particle is in a range from 5 μm to 20 μm.
10. The toner according to claim 8 , wherein the internal additive particle is a pigment particle.
11. The toner according to claim 8 , wherein the hydrophobicity degree HD is obtained by an expression
HD
=
(
Methanol
weight
after
evaluation
)
(
Methanol
weight
after
evaluation
)
+
(
Weight
of
added
pure
water
)
×
100
where the weight of added pure water represents weight of the pure water added to the brilliant pigment particles from a start of addition of the pure water to a stoppage of the addition, and
the methanol weight after evaluation represents methanol weight at a point when the brilliant pigment particles as solid matter precipitates at a surface of solution including the pure water and the methanol.
12. A developing agent container comprising:
the toner according to claim 8 ; and
a container part that stores the toner.
13. An image forming unit comprising:
the toner according to claim 8 ; and
a development device that stores the toner and supplies the toner to an image bearing body on which an electrostatic latent image is formed.
14. An image forming apparatus comprising:
the image forming unit according to claim 13 ;
an image transfer section that transfers a toner image formed on the image bearing body in the image forming unit onto a record medium; and
a fixation section that fixes the transferred toner image.