56results about How to "Lower dynamic viscosity" patented technology

The invention discloses a heading machine using a supercritical carbon dioxide jet flow to break a rock. The technical problems that a disc cutter of the existing heading machine is easy to damage anomaly, low in heading efficiency, and high in cost are solved. The heading machine includes a cutter head system, a supercritical carbon dioxide jet nozzle is arranged on the cutter head system, the supercritical carbon dioxide jet nozzle is connected with a supercritical carbon dioxide generating device through a high-pressure pipeline, and the supercritical carbon dioxide jet nozzle is connectedwith the supercritical carbon dioxide generating device through a high-pressure pump station. The supercritical carbon dioxide generating device can generate supercritical carbon dioxide, the supercritical carbon dioxide can be transported to the supercritical carbon dioxide jet nozzle by the high-pressure pump station, the supercritical carbon dioxide can be jetted at a higher speed by the supercritical carbon dioxide jet nozzle to form a jet flow beam with high concentrated energy, and the jet flow beam is provided with the high destructive effect and can broke the rock to realize heading. According to the heading machine using the supercritical carbon dioxide jet flow to break the rock, the rock breaking efficiency is high, the cost is low, and a rock breaking medium is green and environmental protection.

The invention discloses a bridge deck pavement method for an orthotropic steel bridge. The pavement method comprises the following steps: (1) performing sand-blasting and de-rusting treatment on a steel bridge panel, and coating a mica-containing epoxy anti-corrosion layer; (2) coating a solvent-free epoxy resin water-proof layer; (3) spreading a hot melt particle bonding layer which is partially sunken into the solvent-free epoxy resin water-proof layer, wherein the hot melt particles are high-polymer particles of which the softening point is greater than 150 DEG C; (4) paving a fine-particle asphalt mixture to form a high-elasticity modified asphalt pavement lower layer; (5) spreading a modified emulsified asphalt bonding layer; (6) paving a fine-particle or medium-particle asphalt mixture to form a high-elasticity modified asphalt pavement upper layer. By adopting the pavement method, the construction difficulty is lowered greatly, later maintenance is easy, the universality is high, a pavement lower structure is durable and long in service life, only the surface needs to be maintained in daily use, overall repeated maintenance is avoided, and the investment in a full life cycle is lowered.

The invention relates to a preparation method of poly (p-phenylene terephthalamide) (PPTA) fiber with high elongation at break, and belongs to the technical field of artificial fiber. The preparation method is characterized by after preparing a spinning solution by taking a PPTA polymer of which the logarithmic viscosity is 4.5 to 7.5 dl/g as a raw material and concentrated sulfuric acid of which the concentration is 96 to 100 percent as a solution, forming as-spun filaments through a spinneret plate by adopting a dry-jet wet-spinning technology, then entering a coagulating bath to realize coagulation forming, and winding fiber after coagulation forming into a product after washing, neutralizing, drying and oiling the fiber, wherein the filament tension is controlled to be 0.5g/d or lower during the processes of washing, neutralizing, drying, oiling and winding. The PPTA fiber with the high elongation at break has good impact resistance and good fatigue resistance, and is relatively suitable for the field of rubber composite materials and bulletproof composite materials.

An adjustable passive flow regulator may be used in the field of drug delivery (liquid or gaseous, e.g. for pain management) or for draining cerebrospinal fluid (CSF) for hydrocephalus patient.

The invention provides an ejection pressurizing type sleeve gas recovery device which is used for recovering sleeve gas in a wellhead of an oil field. The ejection pressurizing type sleeve gas recovery device comprises an ejector, a gas-liquid mixing and conveying pump, a liquid inlet valve, a liquid outlet valve, gas inlet valves, a gas storage tank, a gas pressure sensor, a gas flow meter, an electric valve, a control unit and the like, and is integrally manufactured into a skid-mounted block. A liquid inlet opening of the ejector is connected with the upstream part of an oil outlet pipeline of an oil well, and a liquid outlet opening of the ejector is connected with an inlet of the gas-liquid mixing and conveying pump. When the ejection pressurizing type sleeve gas recovery device works normally, the liquid inlet valve and the liquid outlet valve are both opened; when the pressure of the sleeve gas reaches a certain value, the gas pressure sensor transmits a signal to the control unit, the control unit sends an instruction to start the gas-liquid mixing and conveying pump, and the electric valve is opened in a delayed mode; liquid which flows at a high speed in the ejector sucks in the sleeve gas, the liquid and the sleeve gas are mixed to enter the liquid-gas mixing and conveying pump to be pressurized, and then are conveyed into the oil outlet pipeline of the oil well, the sleeve gas can be recovered, and the situation that waste of energy sources and air pollution are caused by combustion or emptying of the sleeve gas is avoided.

The invention discloses a bridge deck pavement structure for an orthotropic steel bridge. The pavement structure comprises a mica-containing epoxy anti-corrosion layer, a solvent-free epoxy resin water-proof layer, a hot melt particle bonding layer, a high-elasticity modified asphalt pavement lower layer, a modified emulsified asphalt bonding layer and a high-elasticity modified asphalt pavement upper layer from bottom to top, wherein the total pavement thickness is 6-8 centimeters; the hot melt particles are high-polymer particles of which the softening point is greater than 150 DEG C; the high-elasticity modified asphalt is modified asphalt of which the elastic recovery is over 95 percent at 25 DEG C; the pavement lower layer is formed by paving a fine-particle asphalt mixture prepared by mixing the high-elasticity modified asphalt with a mineral mixture; the pavement upper layer is formed by paving a fine-particle or medium-particle asphalt mixture prepared by mixing the high-elasticity modified asphalt with the mineral mixture. By adopting the pavement structure, the water-proof layer and the asphalt pavement layer are combined integrally through the hot melt particle bonding layer, so that the shearing strength and durability of the pavement structure are ensured.

An MQ resin including at least 30% SiO₂, preferably at least 50 wt % SiO₂, and having dynamic viscosity of 50 centipoises (cps) to 750 cps at 25° C. is produced from a stable ethylsilicate polymer. The ethylsilicate polymer includes not greater than 1 wt % of TEOS monomer. The ethylsilicate polymer is produced by a two step addition of catalysts wherein a hydrolysis catalyst, for example, hydrochloric acid is added initially and a second catalyst, such as phosphonitrilic chloride trimer, is added subsequently.

The invention discloses a production method of high-strength bamboo pulp viscose glue short fiber, which adopts the steps of dipping, squeezing, smashing, maturing, yellowing, spinning, drawing, refining, drying and the like to prepare high-strength bamboo pulp viscose glue short fiber. The high-strength bamboo pulp viscose glue short fiber prepared with the method has dry breaking strength of 3.2-3.4 CN/dtex and wet breaking strength of 2.0-2.3 CN/dtex, is firm and has strong spinnability; fabrics and clothes manufactured by the fiber have favourable toughness and high abrasive resistance; other indexes are all superior to the first-rate product index of FZ/ T 52006-2006. The fiber manufactured with the method is ideal material for high-rank clothes and household textiles.

The invention relates to ultraviolet thick film photoresist, which is mainly prepared from 10 to 35 parts of phenolic resin, 1 to 10 parts of nanometer silicon-containing copolymer film forming resin, 5 to 20 parts of diazo naphthoquinone light-sensitive compound, 30 to 85 parts of solvent and a small number of other additives such as n-butylamine and surfactants which serve as raw materials by blending the raw materials and filtering through 5 micrometers, 1 micrometer and 0.2 micrometer filters. The nanometer silicon-containing alkaline soluble copolymer film forming resin is added into the film forming resin to increase the adhesivity, flexibility, side-wall verticality and mechanical properties of a film-forming agent and fulfill the aims of preventing adhesive films from cracking and patterns from deforming and even dropping in a salient point process, three-dimensional (3D) combined encapsulation and the manufacturing of micro-electromechanical systems (MEMS).

The invention provides a silane-terminated resin for a sealant. The structural formula of the silane-terminated resin is shown as the specification, wherein R is straight-chain or branched-chain C1-C10 alkyl; R0 is straight-chain or branched-chain C1-C10 alkyl or branched-chain C1-C10 alkoxy; R1 is straight-chain or branched-chain C1-C10 alkyl; and R2 is a diisocyanate group. The invention also discloses a preparation method of the resin, and the method comprises the following steps: using hydroxyl alkoxy silane as the raw material, adding a first catalyst, carrying out nitrogen placement, then performing heating, introducing an epoxy compound to carry out pre-reaction, initiating the reaction, then continuously introducing an epoxy compound for reaction, thereby obtaining a monosiloxane group terminated polyether intermediate; adding a second catalyst and diisocyanate into the intermediate, and performing heat preservation to further carry out reaction, thus obtaining the silane-terminated resin for a sealant. According to the method, the reaction path is shortened, so that side reactions are reduced, the utilization rate of raw materials is increased, three wastes are not generated in the preparation process, the preparation process is simple and environment-friendly, and the prepared resin is low in dynamic viscosity.

An additive manufacturing process comprising:

• (a) providing a curable composition comprising:
  • (i) a filler comprising glassflakes having a diameter D_3,99 as determined by light scattering in the range of from 5 to 150 μm; and
  • (ii) one or more curable compounds;
• (b) controlling an apparatus to form an object by using the curable composition, whereby the curable composition passes a discharge orifice having a minimum diameter Φ_min,

wherein the ratio of the minimum diameter of the discharge orifice to the diameter D_3,99 of the glassflakes (Φ_min/D_3,99) is in the range of 2 to less than 10; and wherein the median diameter D_3,50 of the glassflakes is larger than the thickness of the glassflakes.

An automatic braking control device includes a temperature obtaining section for obtaining an index value of a temperature of brake fluid, a collision prediction time calculation section for calculating collision prediction time of a vehicle with an object, a collision determination section for determining whether the collision prediction time is less than or equal to a threshold, and a pressure control section for controlling a start timing of pressurization of the brake fluid when the collision prediction time is less than or equal to the threshold. The pressure control section sets the start timing to a first timing when the index value is a first temperature and to a second timing when the index value is a second temperature higher than the first temperature. Time from determination of the collision determination section to the first timing is shorter than time from the determination to the second timing.

The present invention relates to an ultrasonic aerosolization platform that has a single access port (10) provided with a trocar (11) inserted into the surgical cavity through a single incision and provided with at least one internal channel (101) in which is positioned an ultrasonic aerosolizer (20) provided with a head (21) that houses a power piezoelectric transducer (214) and a resonating rod (22) that extends orthogonally from the head (21), provided with an internal channel (221) in communication with the internal channel (212) of the head (21) and a free end (222) with an atomization nozzle (30) with orifices (31); a high-frequency ultrasound generator (40) that provides an electrical signal to the power piezoelectric transducer (214), which converts said electrical signal into mechanical oscillations transmitted to the resonating rod (22) in the form of mechanical standing waves; and a processing unit (50) provided with an interface (60) for adjusting the excitation frequency of the transducer (214), adjusting the flow of the therapeutic substance, and adjusting the operating and actuation time of the electrode (not shown) arranged in the resonating rod (22).