60results about How to "Improve charge stability" patented technology

A color toner including toner particles including a colorant, a binder resin, and a wax; and an external additive including at least one of an inorganic particulate material and a particulate resin, wherein the binder resin includes a polyester resin (A) having a crystallinity and a formula (—O—CO—CR1═CR2—CO—O—(CH₂)_n—)_m, wherein R1 and R2 independently represents a hydrocarbon, and n and m are repeating numbers; a resin (B); and a resin (C), wherein the resins (B) and (C) and the wax have an island-sea structure such that the resin (C) is present like islands in a sea of the resin (B) and the wax is substantially included in the resin (C). A toner container, an image forming method, an image forming apparatus and a process cartridge including the color toner are also provided.

The invention discloses an easy-to-store charging pile device. The charging pile device comprises a charging pile body, wherein a charging wire is arranged at one side of the charging pile body; a charging gun is arranged at one end of the charging wire; the charging wire is arranged in a storage box; a wire inlet is formed in the surface, which is at one side of the charging pile body, of the storage box; a first steering wheel is arranged in the storage box at one side of the wire inlet; a second steering wheel is arranged in the storage box at the upper part of the first steering wheel; a weight balancing rolling wheel is arranged in the storage box at the lower part of the first steering wheel and arranged on a rotating shaft; guide sleeves are respectively arranged on two ends of the rotating shaft and sleeved on a guide pillar; the guide pillar is fixedly arranged on the bottom of the storage box; a wire outlet is arranged in the surface of the storage box along the weight balancing rolling wheel arranging direction; and a horizontal roll and two vertical rolls are arranged on the wire outlet and arranged in a cage. By utilizing the charging pile device disclosed by the invention, the charging wire is effectively stored and protected from being damaged.

Employment of a carrier core material for an electrophotographic developer containing 0.8 to 5% by weight of Mg, 0.1 to 1.5% by weight of Ti, 60 to 70% by weight of Fe and 0.2 to 2.5% by weight of Sr and having an amount of Sr dissolved with a pH4 standard solution of 80 to 1000 ppm, a carrier using the core material and a process for producing them, and an electrophotographic developer using the carrier.

A method of preparing toner, the method including preparing a latex for a core by polymerizing a composition for a core including a macromonomer having a hydrophilic group, a hydrophobic group and at least one reactive functional group, at least one polymerizable monomer, and a wax; agglomerating the latex for a core by adding a pigment dispersion dispersed by the macromonomer and an inorganic salt to the prepared latex for a core; and coating the agglomerated latex for a core using a latex for a shell layer, wherein the latex for a shell layer is prepared by polymerizing a composition for a shell layer including at least one polymerizable monomer, a macroinitiator having polydimethyl siloxane units, and a macromonomer, and toner prepared according to the method.

The invention discloses a polypropylene electret air filtering material containing graphene oxide. The polypropylene electret air filtering material comprises, by weight parts, 50-60 parts of polypropylene, 6-10 parts of silicon monoxide, 8-14 parts of powdered activated carbon, 1-4 parts of aminopropyl triethoxy silane coupling agent, 0.6-1.4 parts of glacial acetic acid, an appropriate amount of deionized water, 1-3 parts of low density polyethylene wax, 0.8-2 parts of antioxidant 1010, 0.7-1.4 parts of titanate coupling agent, 4-7 parts of graphene oxide, an appropriate amount of N,N-dimethylformamide, 0.7-1.5 parts of toluene diisocyanate, 0.8-1.6 parts of dibutyltin dilaurate and an appropriate amount of acetone. Silicon nanowires containing alpha-quartz are prepared, the silicon nanowires loaded by activated carbon and treated through the silane coupling agent are added into a melt-blown polypropylene electret material, the adsorption of harmful substances in air by the filtering material is effectively improved, and the filtering material has excellent filtering efficiency.

A toner comprising: toner particles that are manufactured by a wet granulating method and contain a binder resin and a colorant; and

• • composite oxide fine particles having a specific surface area of not more than 300 m²/g, that contain two kinds or more of metal atoms selected from the group consisting of metal atoms that belong to 4A to 7A groups, 8 group and 1B to 4B groups in the long-period-type element periodic table, and an image-forming method using the toner thereof.

Provided are an electrophotographic toner and an electrophotographic image forming apparatus using the same. The electrophotographic toner includes: parent toner particles including a binder resin, a colorant, a releasing agent, and a charge control agent; and barium titanate external additives having an average primary particle diameter in the range of about 50 to about 150 nm, an average shape factor (SF1) in the range of about 100 to about 120, a shape factor in the range of about 0.96 to about 1, and an aspect ratio in the range of about 0.89 to about 1, and added to the surface of the parent toner particles.

The invention discloses a polytetrafluoroethylene-polypropylene composite electret air filtering material and a preparation method thereof. The polytetrafluoroethylene-polypropylene composite electret air filtering material comprises, by weight, 40-50 parts of polypropylene, 20-30 parts of polytetrafluoroethylene suspended fine powder, 7-13 parts of silicon monoxide, 11-17 parts of powdered activated carbon, 2-4 parts of 3-aminopropyl triethoxy silane coupling agent, 0.6-1.7 parts of glacial acetic acid, an appropriate amount of deionized water, 1-3 parts of low-density polyethylene wax, 0.8-2 parts of antioxidants 1010, 0.8-1.5 parts of titanate coupling agent and 1-3 parts of sodium chloride. Silicon nano-wires containing alpha-quartz are prepared and added into melt-blown polypropylene electret materials, the air filtering material has quite high electret charge stability and excellent filtering efficiency, the activated carbon is used for loading the silicon nano-wires treated by the silane coupling agent, the loading capacity of the activated carbon for the silicon nano-wires is improved, and adsorption of the filtering material for harmful substances in air is effectively improved.

The invention provides a wireless charging device and an electronic candle lamp with the same. The wireless charging device comprises a transmitting module and multiple receiving modules, wherein the transmitting module comprises a power supply module, a fission circuit, a transmitting antenna, a transmitting control unit and a signal demodulation circuit; the transmitting antenna is of a rectangular shape; each receiving module comprises a receiving antenna, a rectifying circuit, an energy storage module, a receiving control unit, an electric appliance connected with the receiving control unit and a signal modulation circuit; each receiving antenna is a cylindrical spiral coil; the projection of each receiving antenna is completely positioned in the rectangular area of the transmitting antenna, and an energy transfer method for multiple electromagnetic induction receiving devices by single electromagnetic induction transmitting device is realized; and moreover, the electromagnetic induction transmitting device has uniform electromagnetic field distribution and good charging stability.

Provided is a toner not undergoing the effect of change of temperature and humidity, with high charging stability and having good fixing property and releasability. This is an electrophotographic toner containing at least a binder resin, a colorant, a charge controller and a wax in which the binder resin comprises a polyester resin having an aromatic alcohol ingredient, the charge controller comprises an organic bentonite and the wax comprises a non-polar paraffin wax.

A toner for electrostatic image development, which comprises a binder resin, a colorant and a charge control resin, wherein the charge control resin is a copolymer composed a vinyl monomer unit and a quaternary ammonium salt group-containing (meth)acrylate monomer unit and has a glass transition temperature of 40 to 75° C., and a production process thereof.

Toner including binder resin; wherein the toner, as measured by differential scanning calorimetry (DSC), has glass transition temperature in range of 40° C. through 70° C. at first temperature rising and has no glass transition temperature in range of X° C. through X−20° C. at second temperature rising where X° C. denotes the glass transition temperature at the first temperature rising, the toner has difference of 30 or less between maximum value and minimum value among peak intensities in range of Molecular weight M±300 where Molecular weight M is molecular weight selected from range of 300 through 5,000 in molecular weight distribution of THF-soluble components in the toner as measured by GPC, and the peak intensities are defined as relative values assuming the maximum peak value in molecular weights of 20,000 or less is 100, in molecular weight distribution curve taking intensity as vertical axis and molecular weight as horizontal axis as measured by GPC.

According to the invention, an electret structure (1) is proposed which comprises an electrically conductive substrate (10), a first electret layer (30) and a porous dielectric layer (20), which is arranged between the substrate (10) and the first electret layer (30). The electrically conductive substrate (10) in this case preferably forms an electrode of the electret structure (1) according to the invention. The invention is based on the concept of using the porous dielectric layer (20) to separate the charged electret layer (30) from the electrode (10). As a result, the migration of electrical charges (50) out of the electret layer (30) towards the rear electrode (10) is impeded. Likewise, the migration of oppositely charged charge carriers (55) out of the rear electrode (10) into the electret layer (30) is impeded. The charge stability of an electret structure (10) according to the invention in comparison with conventional addons without a porous dielectric layer (20) between the electret layer (30) and the rear electrode (10) is thus markedly increased.

There is provided a capsulated toner which has low-temperature fixing ability, good storage stability, excellent charge stability, high fixing strength to a sheet paper, and low consumption, and is capable of forming a color image of high-definition, high-gloss, and high-density. The capsulated toner for electrophotography includes a shell layer containing a cycloolefin copolymer resin and a core particle including a synthetic resin different from the cycloolefin copolymer resin, wherein the capsulated toner has a core/shell type structure.

An electrophotographic photoconductor contains a photosensitive layer and a conductive substrate, wherein the photosensitive layer is disposed on the conductive substrate, and the photosensitive layer is a single layer containing a charge generating material, an electron transporting material expressed by the General Formula (1) and a hole transporting material expressed by the General Formula (2): wherein R1 and R2 independently represent any one of a hydrogen atom, substituted or unsubstituted alkyl group, substituted or unsubstituted cycloalkyl group and substituted or unsubstituted aralkyl group, and R3, R4, R5, R6, R7, R8, R9 and R10 independently represent any one of a hydrogen atom, halogen atom, cyano group, nitro group, amino group, hydroxyl group, substituted or unsubstituted alkyl group, substituted or unsubstituted cycloalkyl group and substituted or unsubstituted aralkyl group; and wherein R11, R12, R13, R14, R17, R18, R19 and R20 each represents a hydrogen atom, halogen atom, alkoxy group, alkyl group which may be substituted or aryl group which may be substituted, R15 and R16 each represents a hydrogen atom, halogen atom, alkyl group, and alkoxy group.

The invention discloses a constant charging device for a vertical circular stereo garage. The constant charging device comprises a circular electrified track, an electric conduction carriage, an electric conduction slip ring and a charging pile. The circular electrified track is arranged on a stereo garage main frame and provided with eight annular sliding grooves. The electric conduction carriage is fixed to a triangular plate of a stereo garage circular chain, and the electric conduction carriage is provided with a plurality of electric conduction slip sheets which are correspondingly in sliding fit with the eight annular sliding grooves. An inner ring rotor of the electric conduction slip ring is arranged on a carrying frame top beam shaft in a sleeving manner, an outer ring stator of the electric conduction slip ring is fixed to the triangular plate, and a lead-out wire of the outer ring stator is connected to the electric conduction carriage. The charging pile is arranged on the carrying frame top beam shaft, and a leading-out wire of the inner ring rotor is connected to the charging pile. By means of the above manner, the structure is simple and reasonable, an electric vehicle parked in the garage can be constantly charged, the charging stability is good, the charging speed is high, and using is convenient.

The invention discloses a high-temperature-resistant melt-blown polypropylene compound electret air filtration material. The high-temperature-resistant melt-blown polypropylene compound electret air filtration material is prepared from, by weight, 50-60 parts of polypropylene, 9-13 parts of silicon monoxide, 12-17 parts of powdery activated carbon, 2-6 parts of 3-aminopropyl triethoxy silane coupling agent, 0.5-2 parts of glacial acetic acid, a proper amount of deionized water, 1-3 parts of low-density polyethylene wax, 0.8-1.7 parts of antioxidant 1010, 0.7-1.3 parts of titanate coupling agent, 4-7 parts of silicon dioxide, 2-4 parts of boric acid and 1-4 parts of barium oxide. Silicon nanowires containing alpha-quartz are prepared and are added to the melt-blown polypropylene compound electret material, the material has excellent filtration efficiency and further has an obvious bacterial reproduction inhibiting function. The activated carbon supported silicon nanowires treated by the silane coupling agent are used, the silicon nanowire supporting capability of activated carbon is improved, and the adsorption capability of the filtration material to the harmful substances in the air is improved effectively.

The invention discloses a polypropylene electret air filtering material with flame retardant performance. The material is prepared from, by weight, 50-60 parts of polypropylene, 9-15 parts of silicon monoxide, 12-18 parts of powdered activated carbon, 1-4 parts of 3-aminopropyl triethoxy silane coupling agent, 0.8-1.6 parts of glacial acetic acid, a proper amount of deionized water, 1-3 parts of low-density polyethylene wax, 0.5-1.8 parts of antioxidant, 0.8-1.5 parts of titanate coupling agent, 1-3 parts of antimonous oxide, 0.8-2 parts of zinc borate and 2-4 parts of decabrominated dipheny ethane. Prepared silicon nanowires containing alpha-quartz are added to the melt-blowing polypropylene electret material, and outstanding filtering efficiency is achieved; according to the silicon nanowires loaded by the activated carbon and processed through the silane coupling agent, the loading amount of the silicon nanowires by the activated carbon is improved, and the adsorption of the filtering material to harmful substances in air is effectively improved.

The invention discloses a preparation method of a printing and dyeing wastewater purifying agent, and belongs to the technical field of sewage treatment. Compared with the prior art, the preparation method of the printing and dyeing wastewater purifying agent uses blast furnace slag as a raw material to prepare a base material containing polyaluminum ferric chloride. After cooling, polyaluminum ferric chloride is adsorbed by the blast furnace slag, modified zeolite is added, the surface of the zeolite is modified to become rough, the average adsorption pore size becomes smaller, the specific surface area becomes larger, and the zeolite has no toxic and side effects on the environment, has a wide adaptive range to acidity, can be recycled, can absorb fiber impurities and the like in printing and dyeing wastewater; polyacrylamide can act as a adsorption bridging precipitation net catches, and increases the effect of alumen ustum. Compared with the conventional cationic polyacrylamide, the polyacrylamide emulsion used in the printing and dyeing wastewater purifying agent has a wider pH range, higher charge stability, and better flocculation effect. The preparation method of the printing and dyeing wastewater purifying agent solves a problem of poor treatment ability for the printing and dyeing wastewater currently.

An object of the present invention is to provide a battery which is high in capacity density and superior in stability. An electrode containing a compound having a diazine-N,N′-dioxide structure shown by a general formula (1) described below as an electrode active material is used,

where x, y, x′, and y′ independently shows integer numbers of 0 or more respectively, and the order of condensation of diazine rings and benzene rings may be alternate or random. One of substituents R₁, R₂, R₃, R₄, R_a, R_b, R_c, and R_d shows a part of main chain or side chain of oligomer or polymer, and the other independently shows hydrogen atom, halogen atom, or a specific group.

An electrostatic charge image developing toner includes: toner matrix particles containing a binder resin; and an external additive added to the toner matrix particles, wherein the external additive includes joined particles each including a secondary particle including a plurality of spherical primary particles joined together, the joined particles include at least particles with a secondary particle size d2 in the range of 70 nm to 400 nm, and particles with a ratio d2/d1 in the range of 1.6 to 4.2 make up at least 50% by number of the particles with a secondary particle size d2 in the range of 70 nm to 400 nm, wherein d1 is the diameter of primary particles in the joined particle, and d2 is the secondary particle size.

The present invention relates to particles for electronic paper and to a manufacturing method thereof. The method for manufacturing particles for electronic paper, comprises the steps of: dispersing electronic paper particle compositions containing a polymer resin, a charge controlling agent, and a pigment by using a solvent to obtain sprayable compositions; spraying the sprayable compositions at a predetermined pressure to generate a liquid droplet; drying the liquid droplet; and obtaining particles for electronic paper from the dried liquid droplet. The method of the present invention can manufacture particles for electronic paper without using a stabilizer or an emulsifier, thereby improving charge stability of particles for electronic paper, and providing better environmental stability against contamination.

Provided is a toner not undergoing the effect of change of temperature and humidity, with high charging stability and having good fixing property and releasability. This is an electrophotographic toner containing at least a binder resin, a colorant, a charge controller and a wax in which the binder resin comprises a polyester resin having an aromatic alcohol ingredient, the charge controller comprises an organic bentonite and the wax comprises a non-polar paraffin wax.

The present invention provides an electrophotosensitive material which realizes uniform dispersion of phthalocyanines in a photosensitive layer and has high sensitivity to a digital light source, and also excellent in charge stability under the high temperature atmosphere, weatherability and NOx resistance. The electrophotosensitive material is produced by forming a single-layer type or multi-layer type photosensitive layer containing phthalocyanine as an electric charge generating material, an electric charge transferring material, a predetermined insoluble azo pigment and a predetermined binder resin on a conductive substrate and using, as the insoluble azo pigment, an insoluble azo pigment having no OH group in the molecule wherein (i) an absorbance in an absorption wavelength range of phthalocyanine is ⅓ or less of an absorbance of the phthalocyanine in the wavelength range, or (ii) an absorbance in a wavelength range of an exposure light source of an image forming apparatus is ⅓ or less of an absorbance of the phthalocyanine in the wavelength range.

The toner composition of the present invention and method to make the same includes toner particles mixed with a specific set of extra particulate additives including large colloidal silica sized 90 nm to 120 nm and basing a conductivity of less than 20 μs/cm in combination with medium size silica particles sized 30 nm to 60 nm. Optionally, additional extra particular additives such as silica sized 2 nm to 20 nm, alumina, titania or mixtures thereof can be used. The finished toner having these specific additives exhibited superior printing performance.