395 results about "Particle density" patented technology

Structural cement panel for resisting transverse and shear loads equal to transverse and shear loads provided by plywood and oriented strain board, when fastened to framing for use in shear walls, flooring and roofing systems. The panels provide reduced thermal transmission compared to other structural cement panels. The panels employ one or more layers of a continuous phase resulting from curing an aqueous mixture of calcium sulfate alpha hemihydrate, hydraulic cement, coated expanded perlite particles filler, optional additional fillers, active pozzolan and lime. The coated perlite has a particle size of 1-500 microns, a median diameter of 20-150 microns, and an effective particle density (specific gravity) of less than 0.50 g/cc. The panels are reinforced with fibers, for example alkali-resistant glass fibers. The preferred panel contains no intentionally added entrained air. A method of improving fire resistance in a building is also disclosed.

The present invention relates to non-segregating flavored coffee compositions. In particular, the present invention relates to novel flavored coffee compositions that minimize or inhibit the segregation and separation of constituent components, and the corresponding processes for making such compositions. The flavored coffee compositions herein are characterized as having a roast and ground, an instant coffee component, or mixtures thereof. The roast and ground coffee component will have a moisture level in the range of from about 1% to about 15%, a particle density in the range of from about 0.1 g/cc to about 0.45 g/cc, and a mean particle size distribution in the range of from about 400 microns to about 1300 microns. The instant coffee components used herein will have a particle density in the range of from about 0.1 g/cc to about 0.8 g/cc, a mean particle size distribution in the range of from about 250 microns to about 2360 microns, and a moisture level in the range of from about 1% to about 4.5%. The flavored coffee composition further contains a flavoring component with a moisture level in the range of from about 1% to about 7%, a particle density in the range of from about 0.1 g/cc to about 0.8 g/cc, and a mean particle size distribution in the range of from about 5 microns to about 150 microns. The ratio of coffee component particle size to flavor component particle size is in the range of from about 100:1 to about 5:1.

The subject invention relates to a new alarm which is based on using a quarternary tunable Mid-IR laser to measure both particles and gas at the same time. The measurement is done within an area of which the gas of interest will absorb the Mid-IR radiation. By widely tuning the emission wavelength of the laser, several wavelengths can be measured in order to accurately find both gas composition and particle density with one laser based sensor. We tested a new device which use radiation between 2.27 μm and 2.316 μm. Methane gas reduces intensity of the radiation at certain wavelengths in this device, while particles/fog reduce intensity for all wavelengths. In this case, fog should not trigger an alarm, while methane leaks should. This can also be applied for CO and smoke in which one sensor will measure both parameters to sound an alarm instead of just one parameter.

The invention discloses a travelling robot positioning system based on a single camera. In the system, a point model is adopted for representing an environmental model, an off-line map is calibrated, an action model and an observation model are established for carrying out position updating and road sign calibration, Monte Carto particle filter technology is adopted, particle swarm distribution with weights is adopted for representing robot pose estimation, the weights and the distribution of particles are updated through road sign matching processing, field particle distribution is rasterized, and a sub-region with maximal particle density is selected for positioning the robot. As an independent platform, the system greatly improves the map calibration technology on the environmental model, has great flexibility on the identification of ground line sections, and just needs re-calibration but not needs model re-establishment after environment change. The model reduces the matching complexity in visual processing and improves calculation efficiency. The Monte Carlo localization algorithm is expanded on the information integration processing technology, thus ensuring the real-time property and robustness of the system.

An objective of the invention is to provide a method for producing a polymer-particle composite by which a polymer-particle composite having a desired particle density and a desired film thickness can be produced conveniently without allowing the particle to be aggregated in the polymeric matrix. To accomplish the objective described above, the present invention provides a method for producing a polymer-particle composite comprising a step of forming a polymer-containing layer mainly consisting of a polymeric material and a step of bringing a particle suspension containing the particle suspended in a solvent capable of swelling the polymeric material into contact with the polymer-containing layer.

The present invention provides methods of forming uniform nanoparticle based monolayer films with a high particle density on the surface of a substrate comprising (a) forming a surface modifying layer on a substrate using a material comprising a first functional group that chemically binds to the substrate and a second functional group comprising a group capable of forming van der Waals forces, (b) applying to the surface modifying layer a solution comprising nanoparticles, and (c) curing the resultant structure formed at step (b) for a predetermined time to form a nanoparticle based monolayer film. The present invention further provides substrates and devices comprising the nanoparticle based monolayer films.

The present invention provides a carrier which contains core material particles having magnetism and a coating layer on the surfaces of the core material particles; in which the particle density of the core material particles is 4.0 g/cm³ to 6.0 g/cm³, and the bulk density of the core material particles is 2.0 g/cm³ to 3.0 g/cm³; and also provides a developer using the carrier, an image forming method using the developer, an image forming apparatus using the developer, and a process cartridge using the developer.

An intake system for the combustion air of a motor of a hand held implement is provided. The system includes an air filter and a centrifugal separator. The air filter has a dirt chamber and a clean chamber that is separated therefrom by a filter medium. The clean chamber is fluidically connected with a carburetor of the motor to convey combustion air to the motor. The centrifugal separator splits the air stream into a core flow having low particle density and a peripheral flow having high particle density. The centrifugal separator includes at least two cyclones, wherein the discharged flows from the cyclones are respectively combined in pairs and open out into a common suction tube.

A light guide plate, comprising a light exiting surface and a light entering end, has a shape in which its thickness perpendicular to the light exiting surface increases gradually as it is away from the light entering end and has scattering particles scattered therein. A light guide plate assembly comprises this guide plate, and a prism sheet in which a plurality of prisms are arranged in parallel with the apex angles of the prisms arranged facing the light exiting surface. A surface illuminating device comprises a light guide plate or a light guide plate assembly, and a liquid crystal display device comprises the surface illuminating device. The scattering particles scatter light entering at the light entering end and propagating through the inside and satisfy the following expression (1) and (2), and the apex angles of the prisms of the prism sheet satisfy the following expressions (3) and (4). (F is scattered sectional area, NP is particle density, LG is length of guide plate along incident direction, KC is correction coefficient, phi is apex angle of symmetric prism, and theta1 and theta2 are two apex angles divided by perpendicular of non-symmetric prism.) 1.1<=FNPLGKC<=8.2 ---(1) 0.005<=KC<=0.1 ---(2) 55 DEG<=theta<=80 DEG ---(3) 0 DEG<= theta1<= 15 DEG and 30 DEG<= theta2<= 45 DEG ---(4).

The cold spraying process according to the invention uses cold gas streams whose properties (temperature (T), particle density (p), pressure (p), particle velocity (v)) are variably changed such that they can be adapted to the desired properties of the coatings.

Methods for using focused light scattering techniques for the optical sensing of biological particles suspended in a liquid medium are disclosed. The optical sensing enables one to characterize particles size and/or distribution in a given sample. This, in turn, allows one to identify the biological particles, determine their relative particle density, detect particle shedding, and identify particle aggregation. The methods are also useful in screening and optimizing drug candidates, evaluating the efficacy and dosage levels of such drugs, and in personalized medicine applications.

A method for conducting laser absorption measurements in high temperature process streams having high levels of particulate matter is disclosed. An impinger is positioned substantially parallel to a laser beam propagation path and at upstream position relative to the laser beam. Beam shielding pipes shield the beam from the surrounding environment. Measurement is conducted only in the gap between the two shielding pipes where the beam propagates through the process gas. The impinger facilitates reduced particle presence in the measurement beam, resulting in improved SNR (signal-to-noise) and improved sensitivity and dynamic range of the measurement.

A fresh air duct is configured to direct fresh air filtered by an air conditioning system towards a clean room downstream from the fresh air duct, the fresh air having a first level of particle density. A separate particle filter in the fresh air duct, located downstream from the air conditioning system and upstream from the clean room, is configured to further filter the fresh air to provide filtered fresh air having a second level of particle density therein that is less than the first level. Related methods are also disclosed.

The invention relates to a non-cenosphere light weight cement slurry, which mainly solves the problem that the cement slurry cannot keep the density thereof under a high pressure condition. The non-cenosphere light weight cement slurry is characterized by comprising the following components in portion by weight: 100 portions of cement, 116 to 321 portions of water, 52 to 136 portions of fly ash, 14 to 38 portions of silica fume, 14 to 38 portions of superfine cement, and 6 to 11 portions of early strength agent, wherein the particle diameter of the silica fume (of which the SiO2 content is more than 90 percent) is more than 0 and less than 0.5 mu m, the particle density of the silica fume and the fly ash is 2.0 grams per cubic meter, and the particle diameter of the superfine cement is more than 0 and less than 2 mu m. The light weight cement slurry forms a set of incompressible light weight cement slurry system of which the density is between 1.40 and 1.55 grams per cubic meter through preferentially selecting external additives and applying a grain composition principle, wherein the flowability and the sedimentation stability of the cement slurry are good, the set cement strength is more than 15 MPa and cannot decline at a temperature of 150 DEG C so as to satisfy the technical requirements on oil field exploration and development.

The invention specifically relates to an alpha-alumina-based abrasive and a preparation method thereof. The abrasive is characterized in that a particle density is higher than 3.88g/cm<3>, a micro hardness is higher than 20GPa, and particle-forming grain size is 0.15-0.3 micrometers. The preparation method comprises the steps that: (1) pure water, a boehmite half-finished product and alumina seed grind solution are added into a stirrer with a vacuum pumping function, and the raw materials are stirred and beaten into slurry; (2) dilute nitric acid with a concentration of 20% is added into the slurry, and a sol and then a gel are gradually formed in a vacuum state; (3) the gel is bake-dried under a temperature of 140 DEG C, and is crushed; on-sieve particles are obtained by using a 120-mesh sieve; (4) the obtained particles are calcined, and the calcined particles are sintered; and (5) finished product particles are obtained by sieving. The method provided by the invention has the advantages of low raw material cost, and mature and stable process. With the abrasive particles provided by the invention, a prepared abrasive product has the characteristics such as high grinding efficiency, good self-sharpening performance, and long durability.

A transparent light guide member comprising a first light guide unit in the form of a transparent plate having a rectangular light emitting plane and a parallel groove formed on a rear surface located opposite from the rectangular light emitting plane and parallel to one side of the rectangular light emitting plane; and a second light guide unit, which is transparent, having a columnar external shape to be accommodated in the parallel groove and containing light-scattering particles. Let Φ be the scattering cross section of the particles, L_G the length of the light guide unit 32 in the direction in which light propagates, N_p the particle density, and K_C a compensation coefficient, then a value Φ·L_G·N_p·K_C the light guide member assumes is not smaller than 1.1 and not greater than 8.2, and the compensation coefficient K_C is not smaller than 0.005 and not greater than 0.1.

A particle laminated substrate and a method for manufacturing the particle laminated substrate are disclosed. The particle laminated substrate has a particle accumulation layer formed by accumulating and allowing particles to adhere onto a substrate having a surface where a graft polymer chain is present in which either terminal of the polymer is bonded to the surface of the substrate, by means of an electrostatic accumulating phenomenon, such that a particle density in the vicinity of the surface of the particle accumulation layer is higher than a particle density in the vicinity of the substrate.

The present invention is to provide a carrier and a developer, which have fewer occurrences of carrier adhesion and background smear, excellent granularity and longer durability. The carrier comprises the core material particles having magnetism and resin coating layer covering the core material particles, and wherein the weight average particle diameters is in the range of 22 m to 32 m, the proportion of the weight average particle diameters relative to the number average particle diameter is in the range of 1.00 to 1.20, the content of particles having a diameter of 20 m or smaller is 7% by mass, the content of carrier particles having a diameter of 36 m or smaller is in the range of 90% by mass to 100% by mass, and the proportion of the particle density of the core material particles is in the range of 85% to 100% of the true density of the core material particles.

The invention specifically relates to an alpha-alumina-based abrasive containing sheet-shaped structures, and a preparation method thereof. The abrasive is characterized in that particle density is higher than 3.88, a microhardness is higher than 20GPa, sizes of grains forming particles are lower than 5 micrometers, and the abrasive contains sheet-shaped structures. The preparation method comprises the steps that: (1) pure water and a boehmite semi-finished product are added into a stirring machine with a vacuum pumping function; and the mixture is stirred into slurry; (2) dilute nitric acid with a concentration of 20% is added; stirring is carried out under a vacuum state, such that a sol and then a gel are gradually formed; (3) the gel is bake-dried and crushed; on-sieve particles with a size higher than 120 meshes are obtained by sieving; (4) the sieved particles are calcined, and the calcined particles are sintered; and (5) finished-product particles are obtained by sieving. The preparation method provided by the invention has the advantages of low raw material cost, and mature and stable process. With the method provided by the invention, the prepared abrasive particles contain sheet-shaped structures. Prepared abrasive product has the characteristics such as high grinding efficiency, good self-sharpening performance, long durability, and the like.