摘要:
A two-component developer comprising a magnetic carrier having a carbon black-containing resin-coating layer and a toner composed of a carbon black-containing resin composition is disclosed. A styrene resin, an acrylic resin or a styrene-acrylic copolymer resin is selected as each of the carrier-coating resin and the toner-forming resin, and the carbon black content A in the carrier-coating layer and the carbon black content B in the toner-forming layer satisfy requirements represented by the following formulae: ##STR1## Namely, by adjusting the carbon black contents A and B within specific ranges relatively to each other, a two-component developer which is well-balanced between the frictional chargeability characteristic and the electric resistance is provided.
摘要:
A sintered apatite body obtained by molding and sintering an apatite powder, Ca.sub.5 (PO.sub.4).sub.3 OH, containing 0.01 to 20% by weight of (Ca,Mg).sub.3 (PO.sub.4).sub.2. The sintered apatite body has high mechanical strength and good affinity with living tissues and cells, and is suitable as medical implant materials such as prosthetic teeth or bones.
摘要:
A test reagent container including a discharge port, formed by depressing a projecting part formed on a container bottom part, through which content can be easily and reliably discharged. The test reagent container includes: a bottom part; a peripheral wall raised approximately perpendicularly from a periphery of the bottom part; and a storage part defined by the bottom part and peripheral wall. A projecting part is formed on the bottom part in a projecting manner toward outside the container. A proximal end of the projecting part is formed in a bendable manner relative to the bottom part, and an easily breakable part is formed on a periphery of the projecting part except for the proximal end of the projecting part. The easily breakable part is broken when the projecting part is depressed from outside the container to be pushed into the inside of the container to form a discharge port.
摘要:
A liquid crystal display including a first substrate, a second substrate, a plurality of sensors, and a position detection device is disclosed. The first substrate includes a plurality of pixel electrodes. The second substrate includes at least one opposite electrode and passed through by light. A liquid crystal component is enclosed between the first and the second substrates, and a voltage between the first and the second substrates is controlled to display an image. The sensors are disposed on peripheral portions of the first and the second substrates and output signals corresponding to relative positions of the first and the second substrates. The position detection device receives the signals output from the sensors to determine a touched position on the glass substrate.
摘要:
An image developer using a one-component developer, Including a developing roller visualizing an electrostatic latent image formed on an image bearer with a pulverized toner; and a feed roller feeding the pulverized toner to the developing roller while contacting thereto, wherein the pulverized toner includes a parent toner; a wax; and an external additive comprising an additive having a number-average particle diameter of from 20 to 60 nm and adhering to the surface of the parent toner at an adherence strength of from 50 to 70%, and wherein the following relationships (1) to (3) are satisfied: 4.70
摘要:
An image forming method, including charging a photoreceptor with a charger contacting thereto; irradiating the photoreceptor to form an electrostatic latent image thereon; developing the electrostatic latent image with a toner to form a toner image on the photoreceptor; transferring the toner image onto a recording material directly or through an intermediate transferer; and fixing the toner image on the recording material, wherein the toner includes a binder resin; a colorant; a composition having a low softening point; and an external additive, and wherein a surface resistivity Rse [Ω] of the charger and a volume resistivity Rsw [Ω·cm] of the composition having a low softening point satisfy the following relationship: 0.8×10−1Rse
摘要:
A toner including a binder resin, a wax, and a colorant, wherein particles of the wax having a particle diameter of less than 1.00 μm are included in the toner in an amount of not less than 35% by number and less than 55% by number, and wherein the wax has a particle diameter distribution property such that when particle diameters of particles of the wax are classified into ranges having a width of 0.05 μm, the wax has a particle diameter mode value that is not less than 0.75 μm and less than 1.00 μm; and a fixing method and an image forming method using the above toner.
摘要:
A developing device including a developing roller facing an image bearing member and a toner layer thickness control member to control an amount of a toner adhered to the developing roller, so that an electrostatic latent image formed on the image bearing member is developed with the toner to form a toner image. The following relationships are satisfied: 0.08×100.3×Dv
摘要:
An image forming method, including charging a photoreceptor with a charger contacting thereto; irradiating the photoreceptor to form an electrostatic latent image thereon; developing the electrostatic latent image with a toner to form a toner image on the photoreceptor; transferring the toner image onto a recording material directly or through an intermediate transferer; and fixing the toner image on the recording material, wherein the toner includes a binder resin; a colorant; a composition having a low softening point; and an external additive, and wherein a surface resistivity Rse [Ω] of the charger and a volume resistivity Rsw [Ω·cm] of the composition having a low softening point satisfy the following relationship: 0.8×10−1 Rse
摘要:
A negatively-chargeable non-magnetic one-component developer for developing an electrostatic latent image using a contact DC-bias development method, having a capacitance of 1.05×10−12 to 1.25×10−12 F, a volume resistivity of 5.0×1010 to 5.0×1012 Ω·cm and a dielectric loss tangent of 1.0×10−3 to 2.0×10−2. In a contact DC-bias development method, the developer has a capacitance of 1.30×10−12 to 1.60×10−12 F, a resistivity of 5.0×109 to 5.0×1010 Ω·cm and a dielectric loss tangent of 1.0×10−3 to 2.0×10−2. In a non-contact DC/AC-bias development method, the developer has a capacitance of 1.45×10−12 to 1.60×10−12 F, a resistivity of 5.0×109 to 1.0×1010 Ω·cm and a dielectric loss tangent of 1.0×10−3 to 2.0×10−2.