JP2010060731A5 - - Google Patents

Claims (12)

A charging step of charging the electrostatic latent image carrier with charging means, an exposure step of exposing the charged electrostatic latent image carrier to form an electrostatic latent image, and regulation of a toner layer in contact with the toner carrier A toner layer regulating step for regulating the toner on the toner carrying member with a member, a developing step for developing the electrostatic latent image with the toner on the toner carrying member, and a toner image formed by development on the intermediate transfer member In an image forming method having a transfer step of transferring to a transfer material via or without,
A replenishment step of replenishing the nonmagnetic monocomponent toner (Y) from the replaceable replenishment toner container to the developer container that supports the toner carrier and contains the nonmagnetic monocomponent toner (X);
Aggregation degree of the toner (Y) is α, and agglomeration of a mixture of 1.0 g of the toner (Y) and 4.0 g of toner obtained by sieving the toner (Y) 6 times with a mesh having an opening diameter of 53 μm using a vibrating sieve When the degree is β, the following formulas (1) and (2) are satisfied,
30% ≦ α ≦ 50% ( 1) formula 0.85 ≦ α / β ≦ 1.00 ( 2) and formula, the toner (X) and the toner (Y) are respectively the toner particles, the median volume-based And a fatty acid metal salt having a diameter (D50) of 0.15 to 1.00 μm. The fatty acid metal salt, an image forming method according to claim 1, span value B defined by the following equation (3) is characterized in that 1.75 or less.
Span value B = (D95s−D5s) / D50s (3) Formula D5s: 5% integrated diameter based on volume of fatty acid metal salt D50s: median diameter based on volume of fatty acid metal salt (D50)
D95s: 95% integrated diameter of fatty acid metal salt based on volume The toner layer regulating member, an image forming method according to claim 1 or 2, characterized in that it has an elastomeric layer of polyamide or polyester Le to the contact portion between the toner carrying member. The Shore D hardness of the elastomer layer is γ ( ° ) , and a load of 2.9 × 10 ⁻⁴ N at a load speed of 9.8 × 10 ⁻⁵ N / sec at 25 ° C. in the toner micro compression test is applied to the toner. In the displacement curve from unloading to unloading, when the ratio (restoration rate) of the unloading return and the maximum displacement is Z (25),
25 ≦ γ ≦ 75
0.4 ≦ γ / Z (25) ≦ 2.0
The image forming method according to claim 3, wherein: The image forming method median diameter in the volume-based of the fatty acid metal salt (D50) is, as described in any one of claims 1 to 4, characterized in that a 0.15μm to 0.75 .mu.m. Median diameter in volume-based of the fatty acid metal salt (D50) is a 0.30μm to 0.60 .mu.m, in any one of claims 1 to 5 wherein the span value B is characterized in that 1.50 or less An image forming method to be described. 7. The image forming method according to claim 1 , wherein the fatty acid metal salt is fatty acid zinc or fatty acid calcium. The image forming method according to claim 1 , wherein the toner includes silica and hydrotalcite. The content of the silica in the toner when the content of A parts by weight and the hydrotalcite and B parts by weight, claim 1, characterized in that a 5.0 ≦ A / B ≦ 30.0 The image forming method according to any one of 1 to 8.   10. The image forming method according to claim 1, wherein an average circularity of the toner is 0.970 to 0.995. The image forming method according to claim 1, wherein the toner contains a compound having an ether bond represented by the following structural formula (1) or (2) .

[Wherein R _{1 to} R ₁₁ are alkyl groups having 1 to 6 carbon atoms and may be the same or different from each other. ] The toner has a weight average particle size (D4) of 5 μm or more and 8 μm or less, and a ratio of particles of 4.00 μm or less in a particle size distribution based on the number of the toner is 3% by number or more and 30% by number or less. Izu Re the image forming method according to claim 1 to 11,.