805 results about "Ultrafine particle" patented technology

A smoking article, such as a cigarette, includes a carbonaceous heat source. A mouth end piece segment is located at the mouth end of the smoking article, and the mouth end piece segment allows the smoking article to be placed in the mouth of the smoker to be drawn upon. The smoking article further incorporates an aerosol-generating segment located between the heat generation segment and the mouth end piece segment. The aerosol-generating segment incorporates an aerosol-forming material (e.g., glycerin and flavors). The heat generation segment is in a heat exchange relationship with the aerosol-generating region such that heat generated by the burning fuel element acts to volatilize aerosol-forming material for aerosol formation. The carbonaceous heat source is in intimate contact with coarse, fine or ultrafine particles of materials such as cerium oxide, or mixtures of cerium oxide and palladium chloride.

A light-emitting device comprises a light-emitting element 3 that is provided on a substrate 2 and emits excitation light, and a wavelength converter 4 that converts the excitation light into visible light. The visible light is output light. The wavelength converter 4 comprises a plurality of wavelength conversion layers 4a, 4b and 4c which respectively contain, as phosphors, at least one type of semiconductor ultrafine particles having a mean particle size of not more than 20 nm and at least one type of fluorescent substance having a mean particle size of not less than 0.1 μm in a resin matrix. Thereby, self-quenching of phosphors is reduced and high luminous efficiency is attained.

An anti-reflection material and a polarization film which exhibit superior anti-reflection properties by preventing external light such as sunlight, fluorescent light, etc., from being reflected on a display, which yield a clear image without sparkling and reduces image contrast, and which exhibit superior wear resistance, chemical resistance, and contamination resistance, as well as exhibit optical stability. A hard coat layer is provided on one surface or two surfaces of a transparent substrate directly or via another layer, and an anti-reflection film having a lower refraction index than the hard coat layer is further provide on the hard coat layer. The hard coat layer consists of at least {circle around (1 a polymer polymerizing (metha)acrylate compound having a fluorene structure; {circle around (2 a polymer polymerizing urethane (metha)acrylate compound and ultrafine particles having a high refraction index; and {circle around (3 radiation and/or thermosetting resin and surface-treated titanium oxide ultrafine particles.

The ultrafine particle producing process introduces materials for producing ultrafine particles into a thermal plasma flame under reduced pressure to form a vapor-phase mixture, introduces a reactive gas and a cooling gas toward an end portion of the thermal plasma flame in supply amounts sufficient for quenching the vapor-phase mixture to generate the ultrafine particles and allows the resultant ultrafine particles to come into contact with the reactive gas so as to produce the ultrafine particles whose surfaces are coated with a thin film including one or more components compound derived from decomposition and/or reaction of the reactive gas, for example, an elementary carbon substance and/or a carbon. According to the process, thin film-coated ultrafine particles having high level uniformity in particle size and shape can be produced.

A new, cost effective process for the production of ultrafine particles which is based on mechanically activated chemical reaction of a metal compound with a suitable reagent. The process involves subjecting a mixture of a metal compound and a suitable reagent to mechanical activation to increase the chemical reactivity of the reactants and/or reaction kinetics such that a chemical reaction can occur which produces a solid nano-phase substance. Concomitantly, a by-product phase is also formed. This by-product phase is removed so that the solid nano-phase substance is left behind in the form of ultrafine particles. During mechanical activation a composite structure is formed which consists of an intimate mixture of nano-sized grains of the nano-phase substance and the reaction by-product phase. The step of removing the by-product phase, following mechanical activation, may involve subjecting the composite structure to a suitable solvent which dissolves the by-product phase, while not reacting with the solid nano-phase substance. The process according to the invention may be used to form ultrafine metal powders as well as ultrafine ceramic powders. Advantages of the process include a significant degree of control over the size and size distribution of the ultrafine particles, and over the nature of interfaces created between the solid nano-phase substance and the reaction by-product phase.

A device for sampling of a mixture of ultrafine particles within a moving gas stream includes a suction generator, at least one sample collection element, and a conduit structure coupling the sample collection element with the suction generator. In some embodiments, the suction generator is configurable to separate by suction a portion of a gas stream containing a plurality of ultrafine particles, and to entrain with a motive fluid forming an output mixture. In some embodiments, a conduit is configured to accept a gas stream containing ultrafine particles and to channel it to the collection element.

The invention discloses an antibacterial filtering material for a mask and a method for manufacturing the antibacterial filtering material. The filtering material for the mask comprises antibacterial agents, polymeric nano-fibers and a supporting non-woven fabric. The method for manufacturing the antibacterial filtering material includes spinning the polymeric nano-fibers on the supporting non-woven fabric via solution or fusant of the polymeric nano-fibers added with the antibacterial agents by means of electrostatic spinning. The filtering material for the mask is high in rejection to ultrafine particles, bacteria and viruses, the method for manufacturing the filtering material is simple, cost is low, and the antibacterial filtering material and the method are suitable for industrial production. In addition, the mask made of the antibacterial filtering material is good in breathability, and rejection to sodium chloride aerosol particles with the sizes of 0.3 micrometer can be higher than 90%.

Methods of increasing the rate of separating hydrophobic and hydrophilic particles by flotation have been developed. They are based on using appropriate reagents to enhance the hydrophobicity of the particles to be floated, so that they can be more readily collected by the air bubbles used in flotation. The hydrophobicity-enhancing reagents include low HLB surfactants, naturally occurring lipids, modified lipids, and hydrophobic polymers. These methods can greatly increase the rate of flotation for the particles that are usually difficult to float, such as ultrafine particles, coarse particles, middlings, and the particles that do not readily float in the water containing large amounts of ions derived from the particles. In addition, new collectors for the flotation of phosphate minerals are disclosed.

A chemical analytic apparatus of the present invention is the one which proposes that a miniaturization, a making low-cost and portability are possible and also the operation of each process of separation, concentration and dilution of specimen is possible, and which includes: an introduction means (S1) that introduces a droplet to which magnetic ultrafine particles are mixed into another liquid that differs from the droplet while maintaining a single droplet; a conveyance means by which the droplet that includes the magnetic particles is conveyed in another liquid of the introduction means by applying magnetic field externally to the magnetic ultrafine particles; and processing means (S2 to S6) by which operations for processing of chemical analysis are performed one by one in the process in which the droplet to which the magnetic ultrafine particles are mixed is conveyed by the conveyance means

The dielectric-forming composition according to the invention is characterized by consisting of: composite particles for dielectrics in which part or all of the surfaces of inorganic particles with permittivity of 30 or greater are coated with a conductive metal or a compound thereof, or a conductive organic compound or a conductive inorganic material; and (B) a resin component constituted of at least one of a polymerizable compound and a polymer. In addition, another dielectric-forming composition according to the invention is characterized by containing: ultrafine particle-resin composite particles composed of (J) inorganic ultra fine particles with the average particle size of 0.1 mum or smaller, and (B) a resin component constituted of at least one of a polymerizable compound and a polymer, wherein part or all of the surfaces of the inorganic ultrafine particles (J) are coated with the resin component (B), and the ultrafine particle-resin composite particles contain 20% by weight or more of the inorganic ultrafine particles (J); and inorganic particles with the average particle size of 0.1 to 2 mum and permittivity of 30 or greater, or inorganic composite particles in which a conductive metal or a compound thereof, or a conductive organic compound or a conductive inorganic material is deposited on the part or all of the surfaces of the inorganic particles.

A hard coat film of the present invention comprises a hard coat layer, which is a cured coat layer, provided on at least one side of a transparent plastic film substrate, wherein a hard coat layer forming material comprises urethane acrylate (A); isocyanuric acid acrylate (B) and inorganic ultrafine particles (C), and has a high hardness and suppresses curling due to cracking and cure shrinkage.

The invention relates to an ultrafine particle deduster used for treating industrial fumes. Specifically, an electro-bag compound deduster of the second-grade filtration mode is improved, an onflow vortex mechanism is arranged between the outlet of a filter bag dedusting mechanism and the inlet of an induced draft fan, and the onflow vortex mechanism comprises an onflow vortex chamber, a fume inlet tube and a fume outlet tube; the onflow vortex chamber is in bucket shape of which the cross section is an inversed isosceles trapezoid, and the bottom of the onflow vortex chamber is connected withan ash bucket chamber. Secondary treatment fume which contains finer particulate matters enters the fume inlet tube; airflow downwards deflects after passing through an air deflector and enters the onflow vortex chamber, and finer particulate matters and the inner wall of the onflow vortex chamber diffuse and collide to accelerate ultrafine particles to precipitate, thus separating ultrafine particulate matters from fume. The filter efficiency of the ultrafine particle of the invention can reach above 99.99%; under the condition that the resistance of the deduster body is smaller than 1000Pa(other conditions are same), an anode or cathode fiber filter bag of which the mesh aperture is 5 mu m is used, and the outlet concentration of the deduster is smaller than 15mg/Nm<3>.

The present invention relates to a media mill system and a method using the same to produce fine and ultra-fine particles useful in diagnostic agents, pharmaceuticals, agrochemicals, nutraceuticals and the like.

The invention provides a processing method capable of reserving all components of dendrobium candidum. The processing method comprises the following steps: (1) preliminarily processing the medicinal material; (2) freeze-drying in vacuum; (3) preparing common powder; (4) preparing ultrafine powder; and (5) preparing ultrafine particles, wherein the step of freeze-drying in vacuum comprises the following three processes: pre-freezing; sublimation drying; and desorption drying. The product produced by the method has the advantages of fresh color, aromatic flavor and fully reserved nutrient components without loss, and is convenient to serve; meanwhile, the product is thoroughly dewatered, thus being convenient for long-term preservation, reprocessing and transportation at normal temperature.

The present invention provides a filter medium reducing an increase in pressure drop while in use even in an environment where ultrafine particles form a large proportion of the particles to be collected. The filter medium includes a porous polytetrafluoroethylene (PTFE) membrane, an air-permeable supporting member and a web layer made of polymeric fibers formed by electrospinning (charge induction spinning, electrostatic spinning). The filter medium of the present invention may include an air-permeable adhesive layer adjacent to the web layer.

A system and method for making ultrafine particles are disclosed. A high temperature plasma is generated at an inlet end of a plasma chamber into which precursor materials are introduced. A converging member is located adjacent an outlet end of the plasma chamber. During operation, a substantially constant pressure and/or material flow pattern is maintained to reduce or eliminate fouling of the system.

The invention discloses a method for preparing a charcoal nanometer zero-valent iron compound with a one-step method. The method comprises the following steps of after adsorbing water-soluble iron salt with biomass, performing heating pyrolysis by virtue of microwaves under the anaerobic condition; and reducing iron ions into zero-valent iron by taking pyrolysis gas in the pyrolysis process as a reducing agent, adsorbing zero-valent iron ultrafine particles in situ by taking charcoal produced in the pyrolysis process as a porous adsorption carrier, and synthesizing the charcoal nanometer zero-valent iron compound with the one-step method and low cost. Charcoal zero-valent iron provided by the invention has very strong adsorption performance and the ability of reducing and degrading organicchloride, bisphenol A and antibiotics, has obvious adsorption and passivation effects to heavy metals and can provide an effective repair material to removal or passivation of organic chloride residues, bisphenol A, the antibiotics and heavy metal residues which are difficultly degraded in water body and soil.

The object of the present invention is to provide an ink jet recording medium which is high in gloss and ink absorption and excellent in image colorfulness and adhesion of the coats and a method for producing the same. According to the present invention, there is provided an ink jet recording medium which comprises a support, an undercoat layer containing a salt of an alkaline earth metal and an adhesive provided on the support and an ink-receiving layer provided by coating a coating solution containing inorganic ultrafine particles on the undercoat layer. The undercoat layer preferably contains the adhesive in an amount of 0.05-0.8 time the amount of the salt of alkaline earth metal in weight ratio. Furthermore, the undercoat layer preferably contains an organic pigment. The alkaline earth metal is preferably calcium or magnesium, and more preferably the salt of the alkaline earth metal is a carbonate. The inorganic ultrafine particles are of an amorphous synthetic silica produced by a gas phase method or an alumina compound. There is further provided a method for producing the ink jet recording medium according to which the ink-receiving layer is provided after the undercoat layer is coated and subjected to a hot calendering treatment.

The invention provides a thermal transfer sheet and a protective layer transfer sheet. It is intended to provide a sheet of excellent transfer performance, in particular, a thermal transfer sheet that excels in transfer sensitivity and adhesion between base material and dye layer and that can be used in high-speed photographic printing with high transfer sensitivity, being capable of providing a photographic print of high density and high clearness, and a protective layer transfer sheet that excels in transfer performance, being markedly low in the generation of static electricity at the time of transfer. Further, it is intended to provide a photographic print that excels in antistatic performance, plasticizer resistance and transparency. There is provided a sheet with a base material, in particular, a thermal transfer sheet (I) comprising a laminate of, sequentially arranged, a base material, an underlayer and a dye layer, or a protective layer transfer sheet (II) comprising a base material and, detachably superimposed on at least part of the surface thereof, a protection transfer laminate including a conductive layer, characterized in that the underlayer and conductive layer are each one produced using colloidal inorganic pigment ultrafine particles.

A waxy solid having ultrafine particles homogeneously distributed in a mixture of vegetable oil and waxy solid, the oil being present in a major proportion by weight, forms a homogeneous colloidal solution which is then cooled and subjected to high shear to form ultrafine particles of the waxy solid, in situ, in a size range from about 0.1 μm to 10 μm. The resulting stiff gel retains its shape and high viscosity for at least 30 days when confined in a container in an air atmosphere at 40° C. at substantially sea level. The stability of the gel is visually evidenced by a lack of syneresis. The gel is destabilized at a temperature in the range from 52° C. (125° F.) to 100° C. (212° F.).