摘要:
In a toner formed of toner particles which include a colorant, a wax, and a binder resin containing a crystalline resin (a) primarily composed of a polyester, the crystalline resin has an endothermic peak temperature (Tp) in a range of 50° C. to 80° C., and in a viscoelasticity measurement of the toner, G″(Tp−10) is in a range of 5.0×107 to 5.0×108 Pa, G″(Tp+10) is in a range of 5.0×105 to 5.0×106 Pa, and G″(Tp−20), G″(Tp−10), G″(Tp+10), and G″(Tp+30) satisfy specific relationships.
摘要:
In differential scanning calorimetry of a toner, regarding a binder resin in the toner, (i) the peak temperature T10 of a maximum endothermic peak (temperature raising rate 10.0° C./min; P10) is 50° C. to 80° C. and the half-width W10 is 2.0° C. to 3.5° C. and (ii) W1, W10, and W20 satisfy that W1/W10 is 0.20 to 1.00 and W20/W10 is 1.00 to 1.50, where the half-width of a maximum endothermic peak (temperature raising rate of 1.0° C./min; P1) is represented by W1 (° C.) and the half-width of a maximum endothermic peak (temperature raising rate of 20.0° C./min; P20) is represented by W20 (° C.).
摘要:
In a toner formed of toner particles which include a colorant, a wax, and a binder resin containing a crystalline resin (a) primarily composed of a polyester, the crystalline resin has an endothermic peak temperature (Tp) in a range of 50° C. to 80° C., and in a viscoelasticity measurement of the toner, G″(Tp−10) is in a range of 5.0×107 to 5.0×108 Pa, G″(Tp+10) is in a range of 5.0×105 to 5.0×106 Pa, and G″(Tp−20), G″(Tp−10), G″(Tp+10), and G″(Tp+30) satisfy specific relationships.
摘要:
In differential scanning calorimetry of a toner, regarding a binder resin in the toner, (i) the peak temperature T10 of a maximum endothermic peak (temperature raising rate 10.0° C./min; P10) is 50° C. to 80° C. and the half-width W10 is 2.0° C. to 3.5° C. and (ii) W1, W10, and W20 satisfy that W1/W10 is 0.20 to 1.00 and W20/W10 is 1.00 to 1.50, where the half-width of a maximum endothermic peak (temperature raising rate of 1.0° C./min; P1) is represented by W1 (° C.) and the half-width of a maximum endothermic peak (temperature raising rate of 20.0° C./min; P20) is represented by W20 (° C.).
摘要:
The present invention provides a toner excellent in low-temperature fixability and also excellent in heat-resistant storage property, offset resistance, and durability. In a process for producing a toner containing toner particles by emulsion aggregation, each toner particle includes a binder resin of which a main component is a block polymer having a crystal structure, a colorant, and a release agent; the binder resin includes polyester as a main component; the rate of a portion capable of forming a crystal structure to the binder resin is 50 to 80 mass %; a peak temperature Tp of a maximum endothermic peak attributed to the binder resin is 50 to 80° C. in endothermic amount measurement of the toner with a differential scanning calorimeter (DSC); and fused particles are heated at a heating temperature t (° C.) satisfying Tp′−15.0≦t≦Tp′−5.0 for at least 0.5 hr.
摘要翻译:本发明提供了一种低温定影性优异的调色剂,耐热储存性,耐偏移性和耐久性优异的调色剂。 在通过乳液聚集制造含有调色剂颗粒的调色剂的方法中,每个调色剂颗粒包括其主要成分是具有晶体结构的嵌段聚合物的粘合剂树脂,着色剂和脱模剂; 粘合剂树脂包括聚酯作为主要成分; 能够形成结晶结构部分的粘合剂树脂的比例为50〜80质量%。 使用差示扫描量热计(DSC)的调色剂的吸热量测定中,归因于粘合剂树脂的最大吸热峰的峰值温度Tp为50〜80℃。 并将熔融颗粒在满足Tp'-15.0 @ t @ Tp'-5.0的加热温度t(℃)下加热至少0.5小时。
摘要:
The present invention provides a toner excellent in low-temperature fixability and also excellent in heat-resistant storage property, offset resistance, and durability. In a process for producing a toner containing toner particles by emulsion aggregation, each toner particle includes a binder resin of which a main component is a block polymer having a crystal structure, a colorant, and a release agent; the binder resin includes polyester as a main component; the rate of a portion capable of forming a crystal structure to the binder resin is 50 to 80 mass %; a peak temperature Tp of a maximum endothermic peak attributed to the binder resin is 50 to 80° C. in endothermic amount measurement of the toner with a differential scanning calorimeter (DSC); and fused particles are heated at a heating temperature t (° C.) satisfying Tp′−15.0≦t≦Tp′−5.0 for at least 0.5 hr.
摘要:
In the measurement of an endothermic amount of a toner, (1) an endothermic peak temperature (Tp) derived from the binder resin is 50° C. or higher and 80° C. or lower; (2) a total endothermic amount (ΔH) derived from the binder resin is 30 [J/g] or more and 125 [J/g] or less based on mass of the binder resin; (3) when an endothermic amount derived from the binder resin from an initiation temperature of an endothermic process to Tp is represented by ΔHTp [J/g], ΔH and ΔHTp satisfy formula (1) below; and (4) when an endothermic amount derived from the binder resin from the initiation temperature of an endothermic process to a temperature 3.0° C. lower than Tp is represented by ΔHTp-3 [J/g], ΔH and ΔHTp-3 satisfy formula (2) below. 0.30≦ΔHTp/ΔH≦0.50 (1) 0.00≦ΔHTp-3/ΔH≦0.20 (2)
摘要:
The object of the present invention is to provide a magnetic toner enabling an image with high image density and excellent image reproducibility to be obtained, which is excellent in fluidity, charging stability, and charging uniformity, even for long-term use, and also enabling an image whose fogging, ghost, and scattering are suppressed to be obtained. The magnetic toner has at least a binder resin and a magnetic material, where, the magnetic material is an magnetic iron oxide whose dielectric breakdown voltage of the magnetic material is 160 to 1600 V/cm, and the dielectric loss tangent (tan δ) of the magnetic toner at 100 kHz and 40° C. is 2.0×10−3 to 1.0×10−2.
摘要:
To provide a toner which has superior low-temperature fixing performance, high-temperature anti-offsetting properties and developing performance and may cause neither melt sticking of toner to photosensitive member nor turn-up of cleaning blade. The toner contains at least a binder resin, a colorant and a wax, and the wax is characterized by i) being an oxidized hydrocarbon wax, ii) having a hydroxyl value of from 5 mgKOH/g or more to 150 mgKOH/g or less, and iii) having, in molecular weight distribution measured by gel permeation chromatography of tetrahydrofuran-soluble matter, a main peak within the range of molecular weight of from 200 or more to 600 or less, and a component with a molecular weight of 700 or more in a content of 3% by mass or less.
摘要:
An image forming method and related process cartridge, the method having the steps of controlling the layer thickness of a toner on a toner bearing member by means of a toner regulating blade, and developing with the toner an electrostatic latent image formed on an electrostatic latent image bearing member, the toner regulating blade has, at its part to be kept in touch with the toner bearing member, a specific ten-point average roughness Rz and a specific ratio (area of contact portion/area of non-contact portion) at a specific face pressure, and the toner has a specific average circularity and has a specific aerated bulk density. This image forming method and process cartridge promise superior developing performance in any environment, can keep sleeve negative ghost from occurring and can keep toner melt adhesion to toner regulating blade and toner melt adhesion to toner bearing member from occurring.