42results about How to "Uniform coating on the surface" patented technology

The invention discloses a photo-cured medical catheter hydrophilic lubrication coating and a preparation method thereof. The hydrophilic lubrication coating comprises a bottom coating and a lubrication coating, wherein the bottom coating is attached to the surface of an instrument, and the lubrication coating is attached to the bottom coating. The bottom coating comprises 1-10 parts of polyester acrylate, 50-90 parts of solvents, 0.5-5 parts of photoinitiators, 0.5-2 parts of wetting agents and 0.5-5 parts of reactive diluents; the lubrication coating comprises 1-10 parts of water soluble macromolecules, 1-5 parts of crosslinking macromolecules, 0-1 part of photoinitiators, 0.1-1 part of surfactants and 50-98 parts of mixed solvents. The preparation method of the hydrophilic lubrication coating is simple and easy in operation, substance residues caused by complicated high-temperature chemical reaction are avoided, the cured coating forms a crosslinking structure, has good adhesion on the surface of a medical catheter and has excellent and lasting lubricity in an aqueous medium, the friction coefficient of the surface of the medical catheter is reduced, and harm to human tissues andadhesion of macromolecules in blood are decreased.

The invention discloses a light-cured hydrophilic lubricating coating for medical catheters and a preparation method thereof. The hydrophilic lubricating coating comprises a primer coating attached to the surface of the device and a lubricating coating attached to the underlying coating. The base coat includes: 1-10 parts of polyester acrylate, 50-90 parts of solvent, 0.5-5 parts of photoinitiator, 0.5-2 parts of wetting agent and 0.5-5 parts of reactive diluent; lubricating coating includes: water-soluble 1-10 parts of macromolecules, 1-5 parts of cross-linking macromolecules, 0-1 parts of photoinitiator, 0.1-1 parts of surfactant, and 50-98 parts of mixed solvent. The preparation method of the hydrophilic lubricating coating of the invention is simple and easy to operate, and avoids the residue of substances caused by complex high-temperature chemical reactions; the cured coating forms a cross-linked structure, which not only has good adhesion on the surface of medical catheters, but also has excellent performance in aqueous media. And the long-lasting lubricity reduces the friction coefficient on the surface of the medical catheter, reduces the damage to human tissue and the adhesion of macromolecules in the blood.

The invention belongs to the technical field of corrosion prevention of stainless steel surfaces, and particularly relates to a surface anti-corrosion method of a metal substrate. According to the surface anti-corrosion method, a multicomponent alloy penetration technique is adopted on the basis of a plasma spraying technique, so that a zinc-titanium alloy carburizing layer is formed on the surface of the stainless steel substrate, and the binding force of a Zn-Ti-Al2O3 hot spray coating and the surface of the substrate is greatly increased; by adopting the zinc-titanium alloy carburizing layer, the corrosion effect caused by the existence of ceramic coating pores can be reduced, and the anti-corrosion capability of the spray coating is increased. Therefore, the binding force of the spray coating prepared by adopting the technical scheme and the surface of the stainless steel substrate is large, so that the spray coating is difficult to peel off, and the high-temperature oxidation and corrosion resistant performance of the metal substrate is improved.

The invention discloses a method for spraying a composite coating onto an emulsification pump plunger. The method comprises the following steps that (1) a metal plunger matrix is subjected to oil removal treatment, and sand blasting is carried out after drying; (2) a metal plunger obtained after sand blasting is preheated, and a NiCrAl and Al2O3 containing composite transition layer is sprayed onto the metal plunger through supersonic plasma; (3) after the composite transition layer is sprayed, a Al2O3 and TiO2 composite ceramic face layer is sprayed onto the surface of the composite metal transition layer through supersonic plasma; and (4) the metal plunger with the ceramic face layer sprayed is subjected to rough grinding, accurate grinding and polishing treatment, and the composite coating is obtained. Through the adoption of the method, a supersonic plasma method is utilized, the contents of Al2O3 and TiO2 in the composite coating are controlled, and the obtained coating is high inbonding strength, even in coating surface and high in density and hardness; and compared with a full ceramic plunger, the plunger is not prone to being damaged, the binding force of the coating and the matrix is high, the plunger is repairable, and the application range of the plunger is widened.

The invention discloses an antistatic thermal control coating composition, a preparation method and applications thereof. The coating composition comprises priming paint and finish paint. The priming paint is composed of a matrix namely organic fluorine resin and a filling material namely modified zinc oxide powder; wherein the zinc oxide is capable of forming vertical channels in the priming paint layer. The finish paint is composed of a matrix namely methyl silicone resin with multiple functional groups and a filling material namely modified zinc oxide powder; wherein part of the filling material penetrates the interface between the priming paint layer and the finish paint layer. The prepared antistatic thermal control coating has a white color, a thickness of 130 to 200 [mu]m, a solar absorption ratio of 0.20 to 0.25, a hemispherical emissivity of 0.85 to 0.91, a total mass loss (TML) not more than 1%, collectable volatile condensed mass (CVCM) not more than 0.1%, and a volume resistivity ([rho]v) not more than 107 [omega].m. The coating does not have the phenomenon of cracking, peeling, bubbling, and fading after 100 times of high-low temperature thermal cycle experiments in a temperature range of -100 to 100 DEG C, the optical properties of the coating is stable, and the adhesive force of the coating is high.

The invention provides uses of a hollow fiber braiding pipe, and a hollow fiber desalination film and a preparation method thereof, particularly a hollow fiber braiding pipe reinforcing type desalination film obtained by using the hollow fiber braiding pipe. The preparation method comprises: (1) adopting a hollow fiber braiding pipe as a base lining, carrying out high temperature singeing treatment, removing disordered fibers from the braiding pipe surface, and preparing a hollow fiber ultra-filtration film by coating a polymer on the surface; and (2) forming an ultra-thin desalination layer (interface polymerization function layer) on the surface of the hollow fiber ultra-filtration film by using an interface polymerization method through a polyamine aqueous solution and a polyacyl chloride organic solution. According to the present invention, the obtained hollow fiber desalination film is a low-defect film, wherein the utilization rate of the film can be effectively improved, the additional economic cost caused by the film defect can be reduced, a certain positive role is provided in the film preparation and the film application promotion, and the film fiber generates the self-compacting during the use process due to the influence of the high operation pressure, and it is ensured that no defect is generated during the running process.

The invention discloses a method for preparing a wear-resisting corrosion-resisting nickel-based alloy coating. The method comprises the following steps: cleaning the surface of a workpiece to be sprayed, subsequently performing abrasive blasting to coarsen, further washing, spraying a nickel alloy coating of which the thickness is 40-60mu m onto the washed surface by using a supersonic speed plasma spraying system and a plasma spray gun, after the spraying, naturally cooling in air so as to obtain the nickel-based alloy coating, wherein the spraying process parameters are as follows: the power is 30-40KW, the powder supply velocity is 20-30g.min<-1>, the main gas flow is 90-110L.min<-1>, and the spraying distance is 90-110mm. Due to adoption of the method that the wear-resisting corrosion-resisting nickel-based alloy coating is prepared by using a supersonic speed plasma spraying technique, the obtained nickel-based alloy coating is compact, the surface of the coating is uniform, the coating is good in adhesion strength with the workpiece, the hardness of the coating can meet the requirement, and the technique requirements of wear-resistance and corrosion-resistance at high temperature (300 DEG C) can be well met.

A glassine coating material is prepared from, by total coating formulation weight, 3-5% of at least one or two pigments different in molecular weight, 1-2% of at least one type of acrylic resin, 2-4% of at least one type of polyvinyl alcohol, 1-3% of at least one type of latex, 0.1-0.3% of at least one functional additive, 0.01-0.03% of at least one viscosity modifier and the balance water. After addition of the viscosity modifier, coating viscosity is controlled within a range of 500-600mPa.S. Glassine which adopts the glassine coating material has advantages of freeness of repellence to silicon oil coating, uniformity in silicon oil coating, low consumption and the like.

The invention relates to the technical field of laser processing, in particular to a laser cladding process. Including the following steps: S1: cleaning the surface of the metal component, using a detergent to remove surface oil; S2: preheating the metal component in a heat treatment furnace; S3: using a laser and adding prefabricated alloy powder for laser cladding; S4: laser After the radiation leaves, it is cooled rapidly, and the surface of the metal component is ground and polished after cooling. The invention is suitable for industrial production, can replace the chrome-plating process, saves coating cost, and reduces environmental pollution; the obtained coating has high hardness, good wear resistance, and better combination of the coating and the workpiece surface.

The invention relates to a high temperature oxidation-resistant material for low-density niobium alloy and a method for preparing a high temperature oxidation-resistant coating from the high temperature oxidation-resistant material. The high temperature oxidation-resistant material is characterized by comprising the following components in weight percentage: 10-15wt% of Si, 2-3wt% of Ti, 1-2wt% of Mo, 0.8-1.2wt% of HfO2, 0.7- 0.9wt% of W and the balance of Al. The high temperature oxidation-resistant coating prepared from the high temperature oxidation-resistant material effectively solves the problem of severe oxidation of low-density niobium alloy in an atmospheric environment above 800-degree C, especially about 1100-degree C, keeps high-temperature mechanical properties of the low-density niobium alloy to the maximum extent, expands the application range of low-density niobium alloy and prolongs the service life of low-density niobium alloy; moreover, the high temperature oxidation-resistant coating prepared from the high temperature oxidation-resistant material has good high temperature oxidation resistance, a uniform coating surface and a dense microstructure.