摘要:
A toner including core particles containing at least a resin and a colorant and coated with a resin coating layer is provided. The core particles are formed by flocculating and fusion-bonding at least resin microparticles and colorant microparticles dispersed in fluid dispersion, while two or more coating layers are formed over the core particles. A wax is added to at least one of the coating layer(s) but for the outermost coating layer, and the core particles. A ratio d/r between an average thickness d of the overall coating layers and a volume average particle size r of the core particles is adjusted to 0.01 to 0.6.
摘要:
A radiation curable dry toner includes core-shell toner particles. The core-shell toner particles have an average volume-based diameter between 5 and 10 micrometre, and a core-shell toner particle thereof includes an inner portion having a radiation curable first resin material consisting of at least 90 weight %, preferably at least 95 weight %, of the total amount of resin material of the inner portion; an outer shell surrounding said inner portion, said outer shell including a second resin material, said second resin material being any one of the following: cured first resin material; or a resin material which is different from the first resin material.
摘要:
A toner includes a plurality of toner particles each having a core and a shell layer residing on a surface of the core. Each of the toner particles has a distribution of surface potential, as measured by a scanning probe microscope with respect to a 1 μm2 region of the toner particle in a state where no external additive adheres thereto, satisfying that the surface potential is at least Vmin+ΔV×0.4 in at least 70% and no greater than 95% of the 1 μm2 region, where ΔV denotes a potential difference calculated by subtracting a minimum surface potential Vmin of the 1 μm2 region from a maximum surface potential Vmax of the 1 μm2 region.
摘要:
An electrostatic charge image developing toner includes a toner matrix particle having a core-shell structure. The toner matrix particle contains: a core particle including an amorphous resin, a colorant, a release agent, and a crystalline resin; and a shell layer coating a surface of the core particle at a coverage of 60 to 99%. The shell layer includes an amorphous resin. The amorphous resin contained in the core particle differs from the amorphous resin contained in the shell layer. The toner matrix particle has one to seven discrete shell domains determined by observation of a cross section of the toner matrix particle with an electron microscope.
摘要:
An electrostatic charge image developing toner includes a plurality of toner particles. Each of the plurality of toner particles includes a toner core and a shell layer covering the toner core. The shell layer contains a thermosetting resin. A content ratio of a toner component insoluble in tetrahydrofuran is at least 90 mass % relative to mass of the toner. Melt viscosity of the toner at 75° C. is at least 1.0×104 Pa·s and no greater than 1.0×105 Pa·s. The thermosetting resin is preferably a melamine resin or a urea resin. The toner core preferably contains a binder resin, and the binder resin has a softening point (Tm) of at least 85° C. and no greater than 95° C.
摘要:
The object of the present invention is to provide a toner for development of electrostatic images (hereinafter referred to as toner) which, while preventing dust during fixation, secures improved hot offset resistance and is excellent in providing good image quality. The invention relates to the toner that comprises a binder resin, a colorant and a wax, wherein the wax has, while in a state of being contained in the toner, a melting point of from 55° C. to 90° C., and the value Dt of the toner satisfies a specific formula.
摘要:
A toner includes toner particles each including a core and a shell layer disposed over a surface thereof. The shell layers contain a unit derived from a thermoplastic resin and a unit derived from a monomer or prepolymer of a thermosetting resin. Young's moduli of the shell layers and the cores, as measured using an SPM while raising cantilever temperature thereof, satisfy conditions: X2/X1 is at least 2.0 and no greater than 5.0; and Y2/Y1 is at least 4.0 and no greater than 7.0. X1 denotes a proportion of change of the Young's modulus of the shell layers and X2 denotes a proportion of change of the Young's modulus of the cores from 30° C. to 50° C. Y1 denotes a proportion of change of the Young's modulus of the shell layers and Y2 denotes a proportion of change of the Young's modulus of the cores from 50° C. to 70° C.
摘要:
A low energy consumption monochrome particle includes a core latex having a core a glass transition temperature and a weight average molecular weight. A shell encapsulates the core and includes a shell latex having a shell glass transition temperature and a weight average molecular weight. The glass transition temperature of the shell latex is higher than the glass transition temperature of the core latex. The weight average molecular weight of the shell latex is lower or higher than the weight average molecular weight of the core latex. The low energy consumption monochrome particles are suitable for high speed printing in SCD systems while decreasing minimum fusing temperature, maintaining excellent hot offset and storage, and exhibiting a matte finish.
摘要:
A method of making toner particles that includes forming a pre-shell aggregate mixture by adding to a reactor pre-shell aggregate ingredients, the includes a latex resin, the reactor having a mixing impeller and a heating jacket; performing pre-shell aggregation while homogenizing the pre-shell aggregate mixture with the impeller at an initial tip speed to form pre-shell aggregates; decreasing the tip speed to a second tip speed when the pre-shell aggregates reach a target intermediate average particle diameter; and then decreasing the tip speed at one or more intervals between when the pre-shell aggregates reach the target intermediate average particle diameter and when the pre-shell aggregates reach a target final average particle diameter so that the tip speed meets the following formula: tip speed=1644ft/min−204.9(ft/(min*μm))*average particle diameter(μm).
摘要:
An electrostatic charge image developing toner includes a toner core including at least a binder resin and a shell layer configured to cover the toner core. The shell layer includes an inner layer and an outer layer. A difference obtained by subtracting a SP value of a material for the inner layer from a SP value of the binder resin, ΔSP1, is 0.3 or larger and 1.4 or lower. A difference obtained by subtracting a SP value of a material for the outer layer from the SP value of the material for the inner layer, ΔSP2, is 0.5 or larger and 1.6 or lower. The ΔSP1 is below the ΔSP2.