92results about How to "Uniform distribution" patented technology

An apparatus for applying finishing agents onto a nonwoven web, wherein there is provided a device for pre-bonding of the nonwoven web. There is provided at least one guide surface, over which the pre-bonded nonwoven web is guided. Outlet openings for the finishing agent are provided in the guide surface, so that finishing agent can be applied onto the nonwoven web being guided over the guide surface.

The invention discloses a hydrogenation method for production of hydrogen peroxide by the anthraquinone process, belonging to the technical field of chemical industry reaction. The method provided by the invention comprises: dispersing the gaseous phase containing hydrogen into the working solution containing the anthraquinone derivatives to obtain the gas-liquid mixing fluid containing micron bubbles, so that the gas-liquid mixing fluid passes through the pipe reactor filled with the hydrogenation catalyst at the space velocity of 3 to 1000h<-1> to finish the hydrogenation process. In the method provided by the invention, the gas-liquid micro-dispersing process and the static bed catalytic hydrogenation process are directly integrated, so that the interphase mass transfer is strengthened, and the contacts between different reactants and between the reactant and the catalyst are more sufficient and more uniform, thereby enhancing the efficiency and the controllability of the hydrogenation process and improving the economical efficiency and the security of the production of the hydrogen peroxide.

The invention discloses a jetting glue dispensing valve device and a jetting glue dispensing method. The jetting glue dispensing valve device comprises a jetting glue dispensing valve, a glue supply pipeline and a glue supply valve, wherein a turntable capable of being closed / opened quickly is mounted at the bottom of the glue supply valve. During a glue jetting course, the glue supply valve is closed, and a channel allowing a glue solution to flow back to the glue supply valve from the glue supply pipeline is intercepted, so that glue jetting with precise volume is achieved. After a single glue jetting course is finished, the glue supply valve is opened, and the glue supply channel is opened for filling, so that continuous jetting of the glue solution is achieved. When the device and the jetting glue dispensing method are used for glue dispensing, no backflow occurs, so that an effective utilization rate of striker movement is increased, and jetting of a high-viscosity glue solution is facilitated; the device is simple in structure and easy to process; the turntable has the characteristic of periodic rotation, and can stir the glue solution, so that precipitation of fluorescent powder in the glue solution is avoided effectively; the fluid velocity in the jetting glue dispensing valve is distributed more uniformly; and the glue dispensing quality is ensured.

The invention discloses a heat-exchange tube and belongs to the field of heat enhancement of heat transfer and energy saving. The heat-exchange tube comprises a tube body and a helical fin group, wherein the helical fin is formed by a first helical fin, a second helical fin and a third helical fin, first grooves are formed on the upper portion of the first helical fin, helical fin top portions among the first grooves form first T-shaped fin platforms; second grooves are formed on the upper portion of the second helical fin, helical fin top portions among the second grooves form second T-shaped fin platforms; third grooves are formed on the upper portion of the third helical fin, and helical fin top portions among the third grooves form third T-shaped fin platforms. The heat-exchange tube is characterized a first distance between the top surfaces of the first T-shaped fin platforms and a fin root portion of the first helical fin is smaller than a second distance between the top surfaces of the second T-shaped fin platforms and a fin root portion of the second helical fin, the second distance is smaller than a third distance between the top surfaces of the third T-shaped fin platforms and a fin root portion of the third helical fin, and find grooves are formed in the spaces between the first helical fin and the second helical fin, the second helical fin and the third helical fin, and between the third helical fin and the first helical fin. By the aid of the heat-exchange tube, heat exchange efficiency for falling film evaporation is improved.

The invention provides a preparation method of pressed active carbon. According to the invention, a wet-process forming method is used for preparing the pressed active carbon, namely, an active carbon disperse pulp containing active carbon, a bonder and water is obtained firstly, then the pulp is injected into a corresponding mold according to required shape, then the freeze-drying is carried out on the mold and the active carbon disperse slurry contained in the mold, so as to obtain the pressed active carbon, wherein the pressed active carbon is formed by a plurality of active carbon sheets via laminating, each active carbon sheet is formed by a plurality of active carbon particles through bonding, a hole I formed among active carbon sheets is bigger than a hole II formed among the active carbon particles. Due to the adoption of the method, the operation difficulty is low, the evenness and adsorbing property of the pressed active carbon can be improved, the pressed active carbons in optional shapes can be prepared, and furthermore, the application scope is wide.

The invention discloses a curcumin micelle nasal solution which contains curcumin used as a main drug, a preservative and an isoosmotic adjusting agent. The curcumin micelle nasal solution is characterized by comprising a poly(N-vinylcaprolactam)-polyvinyl acetate-polyethylene glycol copolymer, a medicinal polyethylene glycol auxiliary material and RGD peptide which are used as medicinal excipients. The mass ratio of the main drug curcumin to the poly(N-vinylcaprolactam)-polyvinyl acetate-polyethylene glycol copolymer medicinal excipient is 1:12-1:20. The mass ratio of the medicinal polyethylene glycol auxiliary material to the poly(N-vinylcaprolactam)-polyvinyl acetate-polyethylene glycol copolymer medicinal excipient is 1:20-1:40. The mass ratio of RGD peptide to the medicinal polyethylene glycol auxiliary material is 1:2-1:4. According to the prepared curcumin micelle nasal solution, curcumin has good solubility in an aqueous solution. By a preparation method of the curcumin micelle nasal solution, water solubility of curcumin is solved, and molecular stability of curcumin is raised. Meanwhile, particle size of the micelle is adjusted to an appropriate particle size range (150-220 nm), and stability of the micelle aqueous solution is enhanced.

In a buffer (1) for absorbing impacts, which comprises an elastic buffer element (4) made of a material having a first e-module, and a force take-up axis, the buffer element (4) being compressible at least in the direction of said force take-up axis, it is provided that at least one additional element (3) having a second e-module is enclosed in said buffer element (4), the second e-module being larger than the first e-module.

The invention discloses a curcumin micelle eye drop. The eye drop comprises curcumin as a main drug, an antiseptic, an isotonic regulator, and also comprises a polyethylene caprolactam-polyvinyl acetate-polyethylene glycol copolymer as a drug adjuvant, and dequalinium chloride as a mitochondrial targeting modifier and a stabilizer, a mass ratio of the curcumin main drug to the polyethylene caprolactam-polyvinyl acetate-polyethylene glycol block copolymer drug adjuvant is 1:12-1:20, and a mass ratio of dequalinium chloride to the polyethylene caprolactam-polyvinyl acetate-polyethylene glycol copolymer drug adjuvant is 1:20-1:40. The administration concentration of the curcumin micelle eye drop prepared in the invention can reach 5mg / ml, and the eye drop has the advantages of small micelle particle size, uniform distribution range, good drug stability, reduction of the administration irritation, improvement of the drug absorption of cornea, reduction of the administration concentration, prolongation of the action time of the drug, reduction of the administration frequency, improvement of the patient compliance, and very good economy.