JP2009075383A5

JP2009075383A5 -

Info

Publication number: JP2009075383A5
Application number: JP2007244870A
Authority: JP
Filing date: 2007-09-21
Publication date: 2010-08-05
Anticipated expiration: 2027-09-21

Claims

An image forming method in which the toner on a toner carrier is brought into contact with the surface of the electrostatic latent image carrier, and the electrostatic latent image on the surface of the electrostatic latent image carrier is developed with the toner carried by the toner carrier,
The toner carrier has an elastic layer and a surface layer around the core, and the surface layer satisfies the following conditions 1) and 2) :
1) resin wherein the surface layer contains a resin A, B follows A: Polypropylene glycol or thermosetting consisting polytetramethylene glycol skeleton poly error over ether polyurethane resin,
Resin B: Oite the micro compression test of the acrylic resin 2) the surface layer, the maximum displacement amount when a load 9.8 × 10 ^-4 N at a loading rate 9.8 × 10 ^-5 N / sec When the displacement amount at X100 _D (μm) and load 2.0 × 10 ⁻⁴ N is X20 _D (μm),
5.0 ≦ X100 _D ≦ 15.0
0 ≦ X20 _D ≦ 3.0
The toner is a toner having toner particles containing at least a binder resin, a colorant, and a release agent, and an inorganic fine powder,
The number average particle diameter D1 of the toner is 3.0 to 8.0 μm,
Is measure Te micro compression test odor to the toner, the particle diameter of the toner D ([mu] m), a load 9.8 × 10 ^-4 N with one particle of the toner loading rate 9.8 × 10 ^-5 N / sec When the maximum displacement when loaded is X100 _T (μm) and the displacement when the load is 2.0 × 10 ⁻⁴ N is X20 _T (μm),
D ₁ −0.20 ≦ D ≦ D ₁ +0.20
0.10 ≦ X100 _T /D≦0.90
0.010 ≦ X20 _T /D≦0.080
An image forming method characterized by that.

2. The image forming method according to claim 1 , wherein the resin B has a Tg of 30 ° C. or more and 70 ° C. or less and a weight average molecular weight of 30000 or more and 100,000 or less.

In the surface layer of the toner carrying member, an image forming method according to claim 1 or 2 content of the resin B in the total resin component is characterized in that 5.0 wt% 0.1 wt% .

The image forming method according to any one of claims 1 to 3 , wherein a difference in SP value between the resin A and the resin B is 0.1 or more and 0.9 or less.

The SP value before crosslinking reaction of the resin A is 8.4 or more and 8.9 or less, and the SP value of the resin B is 7.5 or more and 8.6 or less . The image forming method according to any one of the above.

The resin A, an image forming method according to any one of claims 1 to 5, characterized in that it contains a polypropylene glycol units and / or polytetramethylene glycol unit in 60 mass% or more and 85 mass% or less.

The resin B contains, as structural units, a methyl methacrylate unit (MMA), a styrene unit, a 2-ethylhexyl methacrylate unit (EHMA), a hydroxyethyl methacrylate unit (HEMA), and a methyl methacrylate unit (MMA) and a styrene unit. the image forming method according to any one of claims 1 to 6, characterized in that the sum of the molar ratio of acrylic resin is 50% to 90% all the structural units of the acrylic resin.

The viscosity of the toner at 100 ° C. in a flow tester is 1. 5 × 10 ⁴ or more4. The image forming method according to any one of claims 1 to 7, characterized in that 5 × is 10 ⁴ or less.

The D ([mu] m), the X100 _T (μm) and the X20 _T (μm) is,
0.20 ≦ X100 _T /D≦0.80
0.015 ≦ X20 _T /D≦0.060
The image forming method according to any one of claims 1 to 8, characterized in that.

The toner particles are image forming method according to any one of claims 1 to 9, characterized in that it is produced in an aqueous medium.