摘要:
Display particles that are used for an image display apparatus in which the display particles are sealed between two substrates at least one of which is transparent, and by generating an electric field between the substrates, the display particles are moved so that an image is displayed, wherein the display particles include positively chargeable display particles and negatively chargeable display particles, and the positively chargeable display particles and the negatively chargeable display particles are formed by allowing inorganic fine particles made of the same constituent materials to be adhered to the surfaces of base particles, and an image display apparatus provided with the display particles.
摘要:
An image display apparatus comprising two substrates at least one of which is transparent, ribs for maintaining a distance between the substrates and display particles that are sealed between the substrates in a powder state, and displaying an image by generating an electric field between the substrates so that the display particles are moved,wherein of contact faces to the display particles in the gap between the substrates, at least the contact faces of ribs to the display particles have an arithmetic average roughness Ra in a range from 0.01 to 0.20 μm and an average interval Sm of irregularities in a range from 0.5 to 2.5 μm.
摘要:
Display particles, which are used for an image display apparatus having a structure in which the display particles in a powdered state are sealed between two substrates at least one of which is transparent, and by generating an electric field between the substrates, the display particles are moved so that an image is displayed, comprising: base particles A containing at least a resin and a colorant, and having a volume-average particle size D1 of 1 to 50 μm; resin fine particles B being externally added to the base particles, and having an average primary particle size D2 of 30 to 250 nm; and inorganic fine particles C being externally added to the base particles, and having an average primary particle size D3 of 5 to 30 nm, wherein the display particles for an image display apparatus are designed so that D1, D2 and D3 satisfy 10≦D1/D2≦1000 and 2≦D2/D3≦50, and an image display apparatus provided with such particles for an image display apparatus.
摘要:
An image display device 10, having two substrates 11 and 12, at least one of which is transparent; and display particles 21 and 22 enclosed in the powder form between the substrates, the display particles being moved under an electric field generated between the substrates so that an image is displayed, wherein metal oxide fine particles 1 surface-treated with at least one processing agent selected from the group consisting of silane-coupling agents and silicone oils are adhered to at least one substrate surface 20a and/or 20b of the surfaces in contact with the display particles in a gap 18 between the substrates.
摘要:
Display particles for an image display apparatus, wherein the image display apparatus comprises two substrates at least one of which is transparent, with the display particles being sealed between the substrates in a powder state, so that by generating an electric field between the substrates, the display particles are moved to display an image, wherein the display particles are formed through processes in which at least a binder resin and a colorant are kneaded and pulverized to give core particles, resin fine particles are fixed and fused on surfaces of the core particles, and then the core particles on which the resin fine particles are fixed and fused are sphered to give an average degree of roundness of 0.960 or more, and wherein a ratio of use of the resin fine particles is set in the range from 100 to 300% in the rate of the total projection area of the resin fine particles relative to the total surface area of the core particles, as well as an image display apparatus loaded with the display particles.
摘要:
An objective is to provide a developing roller in which increase of residual potential is inhibited during repetitive operation without deteriorating interlayer adhesion, and prepared is a layer immediately below the surface capable of preventing fog caused by toner scattering, accompanied with a surface layer capable of preventing stains formed from foreign matters adhered to the surface, as well as preventing image unevenness since toner electrification is even under the presence of appropriate elasticity, and also to provide a image forming method employing the developing roller. Disclosed is a developing roller possessing an elastic layer made of silicone rubber provided around a conductive shaft, and a plurality of resin layers further provided on the elastic layer, wherein an outermost surface layer among the resin layers comprises silicone copolymerization polyurethane; and a layer immediately below the surface layer comprises a polyurethane resin-silica hybrid.
摘要:
An objective is to provide a developing roller in which increase of residual potential is inhibited during repetitive operation without deteriorating adhesion to an elastic layer, scattering and leakage of toner are prevented, appropriate elasticity is exhibited and a resin layer capable of preventing uneven charging of toner and image unevenness is prepared, and also to provide a image forming method employing the developing roller. Disclosed is a developing roller possessing an elastic layer made of silicone rubber provided around a conductive shaft, and a resin layer further provided on the elastic layer, wherein the resin layer contains polyurethane resin-silica hybrid as a principal component.
摘要:
A developing roller for electrophotographic image forming apparatus is disclosed. The developing roller has a shaft and a resin layer, and the resin layer comprises a binder resin, a resin particle having a particle diameter of 5 μm to 30 μm and a content of from 10% to 50% by weight with respect to the resin layer, and inorganic oxide particles having a number based average primary particle diameter of 5 nm to 100 nm and a content of 1% to 40% by weight with respect to the resin layer. An image forming method employing the developer roller is also disclosed.
摘要:
An electrophotographic image forming method is disclosed. The method includes steps of conveying a developer comprising a toner to a developing zone by a developing roller, and developing an electrostatic latent image formed on an electrostatic latent image carrying member by the developer, and the developing roller has an electroconductive shaft and a resin layer provided around the shaft, the resin layer comprises a surface layer containing silicone copolymer resin as the principal component and a layer containing resin-silica hybrid composite as a principal component provided directly under the surface layer.
摘要:
Disclosed is a toner for electrostatic image development that satisfies both low-temperature fixing ability and excellent high-temperature storage stability, achieves excellent charge property and shatter resistance, and consequently can form a high-quality image even by a high-performance machine such as a high-speed machine.The toner is composed of toner particles obtained by forming a shell layer containing a styrene-acryl-modified polyester resin on the surface of each of core particles comprising a binder resin containing at least a styrene-acrylic resin. The styrene-acryl-modified polyester resin is obtained bonding a styrene-acrylic polymer segment to a terminal of a polyester segment, and the content of the styrene-acrylic polymer segment in the styrene-acryl-modified polyester resin is 5% by mass or more and 30% by mass or less.