61results about How to "Short stripping time" patented technology

The invention provides a method for preparing graphene through a large-scale aqueous phase. According to the method, graphite serves as a raw material. The method comprises the following steps: intercalating the graphite by adopting an intercalator, so that interlayer spacing between graphene sheet layers is enlarged, and the interaction force between the layers is weakened; and directly treating the intercalated graphite through ultrasonic waves, stripping and uniformly dispersing the graphite in an alkaline aqueous solution with the pH value of 10-14, wherein the content of graphene in the dispersion can be over 100mg/mL (about 10 weight percent of graphene), the content of single-layer graphene in the aqueous phase dispersion is more than 90 percent, the equivalent diameter of the graphene sheet layers can be over 1-10 microns, and a graphene film formed by filtering has a complete lattice structure and high electric conductivity. The prepared high-concentration aqueous phase graphene paste can be stored for a long time and is convenient to transport and use. The method is simple in process flow, high in production efficiency, low in energy consumption and low in cost, a commercially available low-cost reagent is adopted, the reagent is easy to recover, and the production process is environment-friendly and pollution-free.

The invention discloses a photoresist peeling solution composition with metal protection. The photoresist peeling solution composition consists of the following substances in percentage by weight: 0.1 to 10 percent of quaternary ammonium hydroxide, 5 to 30 percent of water-soluble alkanol amine, 55 to 94.4 percent of water-soluble organic polar solvent and 0.5 to 5 percent of sugar alcohol additive, wherein the water-soluble organic polar solvent is sulfone, sulfoxide, amide or lactam solvent. Compared with the conventional peeling solution composition, the photoresist peeling solution composition has excellent corrosion resistance to a metal-based coating covered by photoresist, particularly copper and aluminum at the same time of ensuring excellent photoresist peeling performance, and has excellent side corrosion protection effect on the copper. Meanwhile, the peeling solution composition has low volatility and low toxicity, is easily cleaned by using deionized water, and has good maneuverability. The composition is used for peeling and dissolving a photoresist mask in a semiconductor element manufacturing process.

The invention relates to a graphene composite material and a preparation method and application thereof. The average number of layers of the graphene composite material is 1, 2 or 3 layers, the thickness is 0.34-1.25nm, and the order of magnitude of conductivity is 104-105s/m. The preparation method of the graphene composite material includes the following steps of: taking water as a solvent, adding multi-layer graphite and a macromolecular polymer to the water, uniformly mixing, grinding and/or performing ultrasonic treatment to obtain graphene composite material dispersion liquid, and then freezing and drying to prepare the graphene composite material. According to the scheme of the invention, the macromolecular polymer is added to the multi-layer graphite aqueous solution, the viscosityof the system is increased, the peeling and dispersion of graphite can also be realized by using the shearing force, and thus the single-layer or few-layer graphene composite material with less defects, relatively high quality and good conductivity can be prepared.

The invention discloses an ABS (acrylonitrile butadiene styrene) plastic paint remover and belongs to the technical field of paint removal. A main micromolecule solvent, water and a cosolvent are stirred and mixed, a compound surfactant is added, the mixture is stirred and mixed at a high speed, a mixed emulsion is obtained, an activator, a fermentation product, a corrosion inhibitor, a thickening agent and a defoaming agent are added to the mixed emulsion, dispersed at a high speed and subjected to vacuum defoaming, and the ABS plastic paint remover is obtained. The fermentation product is prepared as follows: a soil suspension obtained by mixing soil at the roots of podocarpus macrophyllus and water is mixed with a liquid-state culture medium and then the mixture is subjected to shake cultivation, filtration and concentration. The ABS plastic paint remover has the benefits as follows: the ABS plastic paint remover has high paint removal efficiency and is small in volatility, large in paint removal amount, short in paint removal time and worth popularization and use.

The invention provides a hollow blade easy-to-remove aluminum oxide ceramic core and a preparation method thereof. According to the ceramic core, a shell and a space lattice structure in the shell arecombined, and when the relative density of the space lattice structure is 20 to 50 percent and the thickness of the shell is 0.4 to 0.5 mm, high void ratio of the ceramic core is realized and the deflection and the bending resistance of the ceramic core are guaranteed; and according to the preparation method, stable printing is facilitated by high flowability and low viscosity of ceramic slurry,the properties of the ceramic core are improved well by cooperating with the space lattice structure, the ceramic slurry is printed into a needed forming green body by 3D printing equipment, and the formed ceramic core is obtained by degreasing and sintering the formed green body. The ceramic core has high strength and short core removing time, saves ceramic materials, shortens process flow and provides an efficient solution for the problem about removal of the aluminum oxide ceramic core.

The invention discloses a rare earth coated and magnesium oxide based ceramic core which is characterized by comprising the following raw materials by weight percent: 5% to 10% of mineralizer, 10% to 17% of plasticizer, 1% to 1.5% of polyethylene powder and the balance being rare earth coated magnesium oxide powder. The ceramic core disclosed by the invention can be preferably dissolved in acid and has the advantages of short stripping time, simple stripping equipment, no pollution in a stripping process, safety, reliability and good high-heat resistant performance, the precision casting cost is reduced, and the phenomenon of heat cracks generated in the process of casting hollow thin-wall castings is avoided.

The invention discloses an optical cable which comprises optical fibers, fiber paste and a center shaft. A plurality of loose sleeves wrap the optical fibers, the fiber paste is arranged in gaps between the optical fibers and the loose sleeves, the center shaft is tightly enclosed by the multiple loose sleeves, spaces between the multiple loose sleeves are filled with cable paste, and a waterprooflayer, an inner protective layer, aramid yarns and an outer protective layer are sequentially connected with the outer sides of the loose sleeves in a tightly clinging manner. The optical cable has the advantages that the optical cable is simple in structure; internal structures can be effectively protected by outer sheaths, and the optical cable can be easily stripped by workers without damage on the optical fibers.

A method of removing photoresist from semiconductor wafers through the use of a sparger plate. According to the inventive method, at least one semiconductor wafer is positioned in a process tank above the sparger plate. A mixture of ozone and deionized water is introduced into the process tank at a position below the sparger plate. The mixture of ozone and deionized water is then introduced across the wafer via the sparger plate at an increased flow velocity while the wafer is submerged in the mixture of deionized water and ozone.

The invention discloses a novel portable metal sheath stripper for a fireproof cable. The novel portable metal sheath stripper structurally comprises the fireproof cable, a metal sheath stripping device and an anti-skid sleeve, wherein the fireproof cable runs through the metal sheath stripping device; and the anti-skid sleeve sleeves the outside of the metal sheath stripping device. Compared withthe prior art, the novel portable metal sheath stripper has the beneficial effects that a device does not need to be manually pulled to move back and forth on the cable and directly sleeves the cable, so that the device is always parallel to the cable, the metal sheath can be cut open once, the stripping time is short, cutting interruption of the metal sheath can be avoided and the stripping efficiency is improved; cutting knives can be adjusted once on the basis of spring characteristics and the adjusting speed is high, so that improvement of the stripping speed is facilitated; and four rotary cutting knives can cut the metal sheath at the same time and the cutting depths are the same, so that concave parts and convex parts of the corrugated metal sheath all can be cut, meanwhile, a cable core is not cut, the effect on the cutting effect due to different cutting depths is avoided, cutting is complete and secondary cutting and stripping are not needed.

The invention discloses an ultrasonic peeling device for preparing graphene. The ultrasonic peeling device comprises a tank and a plurality of ultrasonic vibrating spears, wherein the plurality of ultrasonic vibrating spears are vertically fixed in the tank and are annularly distributed in the same frontal projection plane. The ultrasonic peeling device can ultrasonically irradiate the inner zone of the tank in all directions, thus achieving the purpose of remarkably increasing the power density of ultrasonic waves and shortening the peeling time.

The invention relates to a photosensitive resin composition, a photosensitive resin mixture and a corresponding printed circuit board, and belongs to the technical field of preparation of circuit printed elements. The photosensitive resin composition comprises, by weight, 46-70% of alkali-soluble copolymer resin, 26-45% of an ethylenically photopolymerizable unsaturated monomer, 1-5% of a photopolymerization initiator, 0.2-3% of polydopamine particles, 0.5-1% of a coloring agent and 0.01-0.1% of an additive. A photosensitive dry film resist DFR prepared from the composition has especially excellent high adhesion and resist stripping performance, and also has the advantages of excellent analytical performance, high film stripping speed and good film breakage morphology, the application range of the DFR is widened, and the production efficiency and yield of the PCB are improved.

The invention relates to a nonmetallic surface paint remover which is prepared from 25-45 parts of composite glycol ether, 15-35 parts of organic acid, 5-10 parts of surfactant, 10-35 parts of sodium hydroxide, 1-10 parts of sodium dodecyl benzene sulfonate, 40-70 parts of water-soluble film formation resin, 20-30 parts of thickener, 2-9 parts of preservative and 100-200 parts of water. The paint remover is mainly used for removing the paint coating on the nonmetallic surfaces of floor, cement, bricks, stone and the like. The paint remover does not have any dissolution action on the materials above, and thus, does not influence the properties of the materials. The nonmetallic surface paint remover has the advantages of no toxicity, environmental protection, no environmental pollution, short paint removal time, simple production technique, low paint removal cost and favorable market prospects; and the paint surface subjected to paint removal is clean, and can not have the phenomenon of unclean paint removal.

The invention belongs to the technical field of nano materials, and particularly relates to a method and equipment for stripping a layered material nanosheet, and the method comprises the following steps: S1, taking out a layered crystal material, mixing the layered crystal material with a liquid phase medium, putting the mixture into wet grinding equipment for wet grinding, and obtaining a wet grinding mixture after wet grinding; S2, placing a wet grinding mixture obtained after wet grinding in the step S1 in vibration equipment to be vibrated, and achieving sufficient mixing; and S3, addingthe wet grinding mixture obtained by fully mixing in the step S2 and an organic solvent into high-pressure heating equipment, and performing stripping to obtain a suspension solution formed by the nanosheet and the organic solvent and unstripped crystal powder. According to the invention, the wet grinding mixture can be fully mixed, the stripping efficiency can be improved, the stripping time is short, the yield is high, ultrasonic-assisted stripping is not needed, nanosheet size reduction and nanosheet structure defects are avoided, high universality is achieved, the method and the equipmentfor stripping a layered material nanosheet are suitable for large-scale production, the total production efficiency is effectively improved, and the production cost is reduced.

The invention discloses a room-temperature aqueous paint remover and preparation and use methods thereof. The paint remover comprises, by mass, the following components: 13-43% of benzyl alcohol, 6-28% of isobutyl acetate, 3-12% of anisole, 3-18% of ethanolamine, 3-15% of activator, 1-6% of emulsifier and 15-45% of water, wherein the mass ratio of benzyl alcohol to isobutyl acetate is 3:1-3:2, themass ratio of anisole to ethanolamine is 1:1-1:3. The aqueous paint remover has the advantages of environmental protection, quick paint removal, low energy consumption and room-temperature operation.

The invention provides an objective table assembly and a laser de-bonding device. The objective table assembly comprises an objective table, a suction cup and lifting assemblies. The first layer structure is fixed on the objective table. The suction cup is provided with an adsorption end face and a connecting end face, the adsorption end face is divided into at least three adsorption areas, and the adsorption areas comprise a circular adsorption area located in the center of the suction cup and at least two annular adsorption areas sequentially arranged from the circular adsorption area to the outside. The number of the lifting assemblies is at least three, and each lifting assembly is used for upwards pulling up the corresponding adsorption area after the bonding layer at the corresponding adsorption area position is heated by laser and subjected to phase change, so that the first layer structure and the second layer structure are separated at the corresponding adsorption area position. After part of the bonding layer area is scanned by laser, the corresponding adsorption area of the suction cup can be immediately lifted, so that the two layer structures at the adsorption area are separated, the situation that the bonding layer in the molten state is condensed and bonded again due to the fact that the part of the bonding layer area is heated by the laser is prevented, the stripping difficulty is reduced, the stripping time is shortened, and the stripping efficiency is improved.

The invention discloses a pneumatic separation type stripper which is characterized by comprising an expansion air bag (1). An air inlet of the expansion air bag (1) is connected with one end of a hard inflation tube (2), the other end of the hard inflation tube (2) is connected with one end of an air delivery tube (3), the other end of the air delivery tube (3) is connected with an air outlet of an inflation handle (4), and a valve (5) is further arranged on the hard inflation tube (2) or the air delivery tube (3). The pneumatic separation type stripper has the advantages that shortcomings of severe bleeding and injury and difficulty in mastering layers during surgery in the past can be effectively overcome, gaps in non-traditional breast lacuna striping during domestic and overseas breast augmentation surgery can be filled, the pneumatic separation type stripper is simple in structure, convenient to operate, soft in texture and free of optional injury to human bodies, toxicity and peculiar smell and can be repeatedly disinfected and used, and obvious effects can be realized.