Toner for electrostatic charge development wherein no scumming occurs, and toner leakage caused by charge defect of the toner on a developing roller can be inhibited, and an excellent image stability is obtained is provided.
Description
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a view showing a constitution example of a developing device using toner of the present invention.
Claims
1. A toner comprising:
toner particles which comprise a binding resin,a colorant,and a charge controlling agent, andexternal additives which comprise an inorganic particle,wherein the charge controlling agent is an organic boron compound represented by a following chemical formula (A):
2. The toner according to claim 1, wherein the organic boron compound represented by the chemical formula (A) is an organic boron compound represented by the following chemical formula [1]: wherein x represents an alkali metal
3. The toner according to claim 1, wherein an average primary particle diameter of the magnesium silicate compound is 0.05 μm to 0.15 μm and an average secondary particle diameter is 0.2 μm to 0.6 μm, and an amount of the magnesium silicate compound added is 0.1 parts by mass to 5 parts by mass relative to 100 parts by mass of the toner base.
4. The toner according to claim 1, wherein the magnesium silicate compound is one selected from the group consisting of forsterite, steatite and enstatite.
5. The toner according to claim 1, wherein the charge controlling agent is included in the toner in an amount of from 0.5 to 3 parts by weight based on 100 parts by weight of the resin.
6. A non-magnetic one-component image forming method comprising:
forming a latent electrostatic image on an latent electrostatic bearing member primarily charged,developing the latent electrostatic image by various color toners which multiple developing devices have to form a toner image on the latent electrostatic bearing member by a one-component developing method,transferring the toner image with various colors formed on the latent electrostatic bearing member onto a recording material, andfixing the toner image transferred onto the recording material,wherein the toner comprising a binding resin, a colorant, an inorganic particle and a charge controlling agent,wherein the charge controlling agent is an organic boron compound represented by a following chemical formula (A):
7. The non-magnetic one-component image forming method according to claim 6, wherein the developing device used in the developing step has a developing roller and a toner layer thickness regulating member which regulates a layer thickness of the toner formed on the developing roller surface.
8. The non-magnetic one-component image forming method according to claim 7, wherein at least a surface layer of the developing roller is composed of a metal and at least a surface layer of the toner layer thickness regulating member is composed of an elastic body.
9. The non-magnetic one-component image forming method according to claim 7, wherein at least a surface layer of the developing roller is composed of an elastic body and at least a surface layer of the toner layer thickness regulating member is composed of a metal.
10. A process cartridge comprising: a latent electrostatic image bearing member and at least one unit selected from a charging unit, a developing unit and a cleaning unit, and detachable to an image forming apparatus main body,
wherein the developing unit holds a toner,and the toner which comprises a binding resin, a colorant, an inorganic particle and a charge controlling agent,wherein the charge controlling agent is an organic boron compound represented by a following chemical formula (A):
Patent Application
20070207399
