Toner particle having a hardnes of 6.0 to 24.0 mN and a circularity of 0.92 to 0.99
AssigneeKonica Corporation
InventorsTsuyoshi Uchida, Masafumi Uchida, Michiaki Ishikawa, Takao Yamanouchi, Ryuji Kitani, Yasuko Yamauchi
Life of this patent
Estimating the term…
Abstract
An electrostatic photographic image forming toner is disclosed. The toner comprises a toner particle containing a binder resin and a colorant in which the binder resin has a specific softening point of from 105 to 132° C. and the toner particle has a hardness of from 6.0 to 24.0 mN and a circularity of from 0.92 to 0.99.
Claims18
A toner comprising a toner particle containing a binder resin and a colorant;
- wherein the binder resin has a peak or a shoulder within the range of from 40,000 to 500,000 and a peak or a shoulder within the range from 11,000 to 22,000 in the - molecular weight distribution measured by gel permeation chromatography (GPC) employing tetrahydrofuran (THF), and wherein the toner has a softening point of from 105 to 132° C., and the toner particle has a hardness of from 6.0 to 24.0 mN and a circularity of from 0.92 to 0.99.
A toner comprising a toner particle containing a colorant and a binder resin derived from at least one monomer selected from an aromatic vinyl monomer, acrylic acid ester based monomer, methacrylic acid ester based monomer, vinyl ester based monomer, vinyl ether based monomer, monoolefin based monomer, diolefin based monomers, and halogenated olefin monomer, wherein the toner has a softening point of from 105 to 132° C., and the toner particle has a hardness of from 6.0 to 24.0 mN, a circularity of from 0.92 to 0.99, and a matrix-domain structure in which the matrix is constituted by a continuous phase of the binder resin and the domain is constituted by isolated phase of the colorant, wherein an average area of Voronoi's polygon indicating respective domain phase is from 20,000 to 120,000 nm2.
The method of claim 18, wherein the toner particle has a matrix-domain structure in which the matrix is constituted by a continuous phase of the binder resin and the domain is constituted by isolated phase of the colorant and wherein an average area of Voronoi's polygon indicating respective domain phase is from 20,000 to 120,000 nm2.
Dependencies are inferred from the claim text.