86results about How to "With roughness" patented technology

The invention provides a preparation method of a magnesium alloy surface micro-arc oxidation/spray coating compound film, which relates to a preparation method of a magnesium alloy surface compound film. The invention solves the problems that film layers obtained by chemical composition coating, anodic oxidation and vapor deposition in the existing magnesium alloy surface treatment method are thin and have poor corrosion resistance performance, the ion injection has high cost and is difficult to realize large-area processing, the combining force between coating layers and the magnesium alloy is poor, and organic coating layers has the defect of easy aging. The preparation method has the following steps: firstly, using micro-arc oxidation for preparing ceramic films on the surface of the magnesium alloy; then, adopting air spray coating for spraying and coating inorganic paint onto the ceramic films; and then, carrying out heat treatment to obtain the micro-arc oxidation/spray coating compound film. The method is simple, and the cost is low. The air spray coating uses porous structures of the micro-arc oxidation ceramic films, so the combination of the inorganic coating layers and the ceramic films is firm, the thickness of the compound films is between 20 and 40 mum, the self corrosion electric potential is positively moved to -1.02 V, the corrosion current density is lowered by 5 orders through being compared with that of the magnesium alloy, the magnesium alloy surface micro-arc oxidation/spray coating compound film has no damage after 72 to 144h of salt spray tests, and the corrosion resistance performance is good.

The invention aims at providing a method for preparing a multi-drug multi-coating eluting intravascular stent through ultrasonic atomizing and spraying, wherein VEGF, SZ-21 and other protein drugs, taking chitosan as a drug carrier, form a first coating; the second layer is a shielding layer, which adopts a polymer poly L lactic acid (PLLA) and can be added with polyethylene glycol (PEG) in different proportions to control release speed of drug; the third layer is lipid soluble medicine, such as rapamycin, which uses PLLA as a drug carrier; and a coating at the top end of the fourth layer, same as the second layer, is a shielding layer. Two uniform drug polymer coatings can simultaneously load multiple drugs, and the release speed of the drug can be regulated and controlled by regulating a mixing proportion of the PEG and the polymer, so as to inhibit restenosis and to reduce formation of thrombus simultaneously.

The invention relates to a production process for a low-carbon cold-rolled precision ultrathin steel strip. The production process comprises pretreatment, heat treatment, finish rolling, tension leveling, and longitudinal shear and slitting to obtain a finished product. The low-carbon cold-rolled precision ultrathin steel strip produced by the process has certain roughness, and a printed layer or a protective layer on the surface of the steel strip is firm and does not fall off; the strip is high in flatness and easy to form; and the steel strip has the thickness of less than 0.08mm and even less than 0.06mm, and can be used for producing carbon steel products required to be coated with pigments or protective layers.

The invention provides a nano-microcapsule coated intravascular stent of a core-shell structure and a preparation method of the nano-microcapsule coated intravascular stent, applicable to the technical field of medical instruments. Based on a coaxial electrostatic spraying technology which has characteristics of being efficient, simple and convenient, and having microspheres controlled to release and the like, a uniform nano-microcapsule coating is sprayed on a surface of a stent body part, namely the stent comprises a metal stent body part having an outer surface, having an excellent mechanical property; and a uniform drug coating, wherein the coating which is formed by uniformly depositing drug-loaded nano-microcapsules of core-shell structure, can encapsulate multiple drugs and has a good slow-release effect. The drug stent coating prepared by the invention is controllable in coating thickness, simple in preparation process, low in equipment requirement and high in preparation efficiency. Depending on curative effect of the required stent, variety of the encapsulated drugs, encapsulated drug dosage and encapsulation way can be changed to realize different release effects; and the intravascular stent is favorable for blood vessel endothelium repairing and inhibiting restenosis.

Disclosed are an extruded semi-grouting reinforced sleeve with a built-in casing, a connective structure, and a construction method. The sleeve is a hot-rolled seamless steel tube. The wall of the sleeve is provided with a grout inlet and a grout outlet. The sleeve is provided with circular inner projections. One end of the sleeve is an extruded end, and the rest is a grout-anchoring end. The built-in casing is arranged inside the extruded end. The inner diameter of the built-in casing is equal to the outer diameter of a rebar to be connected, and less than the inner diameter of the grout-anchoring end. All of the grout inlet, the grout outlet and the circular inner projections are located at the grout-anchoring end. By the use of the built-in casing, the deformation of the extruded end is lessened to avoid the extruded end being damaged during crimping; the sleeve is widely applicable to the rebar connection of prefabricated concrete columns in multi-storey and high-rise prefabricated assembled concrete frame structures, shear wall structures or frame shear wall structures, as well as the connection of horizontal rebars in prefabricated concrete beams, the connection of rebars in prefabricated concrete shear walls and the connection of rebars in existing reinforcement projects.

The invention discloses a method for improving wettability of electrode plates of a lithium-ion battery. The method comprises preparation of a positive electrode plate and a negative electrode plate, wherein preparation of the positive electrode plate and the negative electrode plate comprises a coating step, a drying step, a rolling step and a slitting step; a mirror grinding roller is sprayed with an anti-adhesion coating before rolling; and the anti-adhesion coating is prepared by the following methods: (1) high-temperature degreasing, namely baking the mirror grinding roller at 450-500 DEG C for 4-6 hours, and cleaning the surface with ethyl alcohol; (2) surface pretreatment, namely carrying out phosphating on the surface of the mirror grinding roller in the step (1); and (3) water curtain spraying, namely mixing teflon PTFE, silicon nitride, aluminum oxide, a curing agent VM7799 and water evenly to obtain slurry, and evenly spraying the surface of the mirror grinding roller with the slurry, wherein the ratio of the teflon PTFE to the silicon nitride to the aluminum oxide to the curing agent VM7799 to water is (20-25) to (10-12) to (10-12) to (15-20) to (40-45). The method disclosed by the invention is simple in process step and high in operability; and the wettability of the electrode plates of the lithium-ion battery can be improved.

The invention belongs to the field of printing plates and relates to a preparation method for an aluminum plate base for a printing plate and particularly relates to a preparation method for the aluminum plate base for direct plate making in inkjet printing, and the method can improve image-text resolution factor. In the invention, after an electrolyzing and anodizing treatment step and before a water washing step, the step of soaking the aluminum plate base by kalinous treatment fluid is added, so as to enable nanometer and micron coarse structures to be built on the surface of the aluminum plate base, and the high-resolution aluminum plate base for direct plate making in inkjet printing can be obtained. The nanometer and micron coarse structures can control infiltration and diffusion actions of an ink droplet on the surface of the aluminum plate base, and the obtained aluminum plate base has roughness and meanwhile has an absorbency and excellent wearing resistance. By using the direct plate making technology in inkjet printing, plate making ink is sprayed on the aluminum plate base prepared through the method provided by the invention to form an image-text region, and by adjusting the preparation technology of the aluminum plate base, the contrast between the image-text region and a non-image text region can be enhanced, and the resolving power of the obtained picture and text can be improved.

A polytetrafluoroethylene dental floss comprises a floss body and is characterized in that the floss body is formed by the process that a polytetrafluoroethylene film provided with micropore is split by a film splitting blade and then is rolled up and stretched by a forming die and the transverse section of the floss body is in 'hi' (a Japanese hiragana) shape. The polytetrafluoroethylene dental floss of the invention is quick is the effect of degree of tightness when the floss body enters into slit between the teeth, is convenient to enter the slit between the teeth, and contact area of the floss body for cleaning teeth is large and is improved by 50-60% than that of the existing dental floss. The polytetrafluoroethylene dental floss can be used for cleaning teeth, repairing teeth and teeth health protection in hospitals and families.

The invention relates to a method for compounding a metal membrane by a transfer-type film as well as production equipment thereof. The method comprises the following steps: pretreating the surface of a plastic film; coating mucilage on the surface of a metal layer on a carrier film; drying up the carrier film; precooling the carrier film; compounding the plastic film and the carrier film by a lamination mode; carrying out hot-pressing and drying; stripping a base material layer of the carrier film. The mucilage is coated on the carrier film and is compounded with the plastic film, and finally the base material layer of the carrier film is stripped off, so that the original surface of the metal layer of the carrier film is attached to the plastic film by the mucilage, and the surface of the metal layer, which is attached to the base material layer, is converted into the surface of a metal compound film. The surface of the metal compound film after being compounded is provided with an even mirror surface, and has high metallic luster; the metal film is compounded by a transfer mode without being performed at high-temperature environments; the plastic film cannot be deformed, and the waste rate of the plastic film is reduced to be less than 0.5%; the finished product rate of the metal compound film is improved greatly.

The invention belongs to the technical field of air column bags and discloses an air column bag for cold chain transportation. The air column bag comprises an upper film used for making contact with foods, and a lower film forming an outer surface after wrapping foods. A plurality of vertical heat seals are arranged between the upper film and the lower film and separate the upper film and the lower film into a plurality of air columns. The two ends of the multiple air columns are connected through the upper heat seals and the lower heat seals correspondingly. The ends, close to the upper heatseals, in the air columns are each provided with an air valve film. The outer surface of the lower film is provided with an antiskid structure used for preventing water in air from coagulating into asmooth ice layer. The antiskid structure is arranged, thus when the air column bag is placed in a freezing chamber, the water in the air is prevented from coagulating into the smooth ice layer, the points of force during taking of the air column bag and the foods therein are increased, and grabbing and transportation are convenient.

The invention discloses an optical lens polishing device which comprises a polishing pad, a polishing pad base, a driving device, a separator, pressing blocks and a polishing machine. The polishing pad is arranged on the polishing pad base. The polishing pad base is connected to the driving device. The separator is arranged on the polishing pad. A plurality of placement grooves are formed in the separator. The pressing blocks are arranged inside the placement grooves in the separator. A hole is formed in the middle of the separator. The separator is connected to the polishing machine through a hole. The invention further discloses a polishing technology. The polishing technology comprises the specific steps of finishing a correction mold, finishing the polishing pad through the correction mold; cleaning the polishing pad; fixing the polishing pad to the polishing pad base; preparing a polishing solution; placing the polishing solution into a polishing solution circulation cylinder of the polishing machine; placing lenses into the placement grooves of the separator; placing the pressing blocks on the lenses; starting the polishing machine and the driving device for polishing. In this way, it is ensured that the product machining face is on the same plane, stress is uniform, and the polishing effect is improved.

The invention relates to an electric arc spraying method. The electric arc spraying method comprises the following steps that S1, construction preparation is conducted; S2, pretreatment is conducted on the surface to be sprayed, specifically, sand blasting treatment is conducted on the surface of a workpiece through pneumatically-controlled sand blasting equipment, and the roughness of the workpiece reaches 90-120 microns; S3, pretreatment is conducted on a metal wire, specifically, the metal wire is cleaned through a rust remover, straightened through a straightening machine after being cleaned and dried, and polished after being straightened, so that the surface of the metal wire is smooth; S4, electric arc spraying is conducted; S5, coating hole sealing is conducted; and S6, coating inspection is conducted, specifically, the appearance surface obtained after spraying is inspected. According to the electric arc spraying method, the metal wire is cleaned, dried, straightened and polished before spraying, so that the outer surface of the workpiece obtained after spraying is smooth, a coating is uniform, flat and compact, the coating and a base body are well combined, bubbling, cracking, pitted surfaces and peeling are avoided, and accordingly the corrosion resistance and structural strength of the workpiece are improved.

The invention discloses a rough surface profiled fiber and a preparation method and application thereof. The preparation method of the rough surface profiled fiber comprises the following steps of spinning yarns through a profiled spinneret to obtain initial fiber products; performing corrosion treatment on the obtained initial fiber products; performing washing and drying processes to obtain finished fiber products, namely, rough surface profiled fiber, wherein the process of spinning the yarns through the profiled spinneret produces the initial fiber products with the radial cross section in a star shape, then the initial fiber products are corroded, and a number of corrosive pits are formed in the surface of the obtained finished fiber products, namely, the surface obtains certain roughness to further improve condensate performance. The profiled fiber with the corrosive pits in the surface is made of polar polymers, thereby having high water absorbency, the star-shaped structure provides sliding channels for collected water, and meanwhile, the surface roughness can further improve the condensate performance of the fiber.

The invention provides a method for preparing high-tenacity high-hardness anti-dazzle glass. The method comprises the steps that firstly, raw materials needed for manufacturing the glass are prepared, then the raw materials are evenly mixed and ground to obtain a mixture, the mixture is placed in a smelting furnace, and then composite clarifying agents are added for clarifying; the mixture is cooled to room temperature, a material a is obtained, the material a is formed, then annealing treatment is carried out, and a material b is obtained; after coring treatment and crystallization treatment are carried out on the material b, a material c is obtained; the material c is preheated, preheating temperature ranges from 720 DEG C to 820 DEG C, and heat preservation is carried out for 1-2 h; then the material c is placed in frosting liquid to be soaked for 60-80 s, a polishing solution is sprayed to the material c for 3-10 min, then the material is taken out to be washed, dried and air-cooled to room temperature, and the high-tenacity high-hardness anti-dazzle glass is obtained.

The matt coating base film is sequentially composed of an upper surface layer, a core layer and a lower surface layer, the upper surface layer is prepared from the following raw materials in parts by mass: 90-95 parts of matting master batch, 4-7 parts of rosin resin and 1-3 parts of an anti-sticking agent, and the matting master batch is prepared from the following raw materials in parts by mass: 82.5-90.5 parts of polypropylene, 5-10 parts of silane modified silicon dioxide matting powder and 0.001-0.002 part of an initiator. The invention also discloses a preparation method of the matt coating base film. According to the invention, PVDC coating can be directly carried out without pre-coating primer, the cost is saved, and the packaging base material is safe and environment-friendly, has good matting performance and mechanical performance, and is a novel, green and excellent-performance packaging base material.