Image forming method, toner, and image forming apparatus
An image forming method is provided. The method includes the steps of forming an electrostatic latent image on a photoconductor; developing the electrostatic latent image into a toner image with a toner; transferring the toner image onto a recording medium having a smoothness of 20 s or less; and fixing the toner image on the recording medium. The toner exhibits an adhesion force of 100 gf or more, where the adhesion force is the maximum value of a pull force between a layer of the toner and standard paper determined by a tacking test with a probe temperature of 140° C.
1. An image forming method, comprising:
forming an electrostatic latent image on a photoconductor;
developing the electrostatic latent image into a toner image with a toner exhibiting an adhesion force of 100 gf or more, the adhesion force being the maximum value of a pull force between a layer of the toner and standard paper determined by a tacking test with a probe temperature of 140° C.;
transferring the toner image onto a recording medium having a smoothness of 20 s or less; and
fixing the toner image on the recording medium,
wherein said method is further characterized by any one of the following conditions a), b), c), or d):
a) the toner comprises:
a non-linear amorphous polyester resin A; and
a linear amorphous polyester resin B,
wherein THF-insoluble material in the toner has a glass transition temperature, measured in a second heating of differential scanning calorimetry, in the range of −40° C. to 30° C., and
wherein the THF-insoluble material satisfies the following inequations:
1×10 5 (Pa)≦ G ′(100)≦1×10 7 (Pa)
G ′(40)/ G ′(100)≦3.50×10
wherein G′(40) and G′(100) represent storage elastic modulus of the THF-insoluble at 40° C. and 100° C., respectively;
b) the toner further includes a crystalline polyester resin C, and
wherein THF-soluble material in the toner has a glass transition temperature, measured in a second heating of differential scanning calorimetry, in the range of 20° C. to 35° C.
c) in the fixing, the toner image is fixed on the recording medium with a fixing belt having a release layer having an average thickness t 2 of 10 μm or less;
d) in the fixing the toner image is fixed on the recording medium with a fixing belt having a Martens hardness of 1.0 N/mm 2 or less.
2. The image forming method according to claim 1 , wherein said method is further characterized by condition a).
3. The image forming method according to claim 1 , wherein said method is further characterized by condition b).
4. The image forming method according to claim 1 , wherein said method is further characterized by condition c).
5. The image forming method according to claim 1 , wherein said method is further characterized by condition d).