13results about How to "No bubbles" patented technology

The invention discloses a two-component waterborne polyurethane coating for three-proof paint machine coating, comprising a component A and a component B, wherein, by weight, the component A comprises the following raw materials in parts by weight: waterborne hydroxy acrylic dispersion: 25.0-35.0 parts; anionic polyacrylate dispersion: 15.0-25.0 parts; organosilicon-modified styrene acrylic emulsion: 20.0-30.0 parts; silica sol: 3.5-6.5 parts; cosolvent: 3.6-7.8 parts; functional additive: 0.7-2.9 parts; water: 6.0-15.0 parts; by weight, the component B comprises the following raw materials in parts by weight: aliphatic polyisocyanate: 70.0-90.0 parts; propylene glycol diacetate: 15-25 parts. The two-component water-based polyurethane three-proof paint product used for three-proof paint machine coating has the advantages of waterproof, moisture-proof, mildew-proof, salt spray resistance, high hardness, high gloss, high transparency, resistance to cold and hot shocks, scratch resistance, strong adhesion, long activation period, no blistering when thickly coated, health and environmental protection, etc., and can be used to protect electronic circuit boards and their components.

The utility model relates to the technical field of coating devices, and discloses a rotatable efficient cutter coating device which comprises a body, a door plate is rotatably connected to the left side of the inner wall of the front end of the body, target materials are fixedly connected to the inner walls of the left end and the right end of the body, and air dryers are arranged on the left side and the right side of the top end of the body. Sliding rails are fixedly connected to the left side and the right side of the bottom end of the inner wall of the body, sliding blocks are slidably connected to the inner walls of the top ends of the sliding rails, and protective covers are fixedly connected to the middles of the top ends of the sliding blocks. According to the utility model, after the cutter is fixed in the clamp, the first motor drives the first driving gear and the driven gear to rotate through the rotating shaft, so that the fixed rod is driven to rotate and revolve, the film thickness difference between the cutters on the same fixed rod is reduced, the coating on the surface of the cutter is more uniform, and the coating quality is improved; the service life of the cutter is prolonged, and the coating efficiency is improved.

This invention belongs to the field of hot melt adhesive film technology, specifically relating to a hot melt adhesive film for bonding PET substrates and its preparation method, comprising the following components by weight: 40-50 parts of silane coupling agent modified atactic polypropylene, 40-50 parts of low-crystallinity TPU hot melt adhesive, and 10-15 parts of a special tackifying resin; wherein the silane coupling agent modified atactic polypropylene comprises the following components by weight: 100 parts of atactic polypropylene, 0.05-0.15 parts of peroxide ester initiator, and 0.05-1 part of vinyl active silane coupling agent. The beneficial effect of this invention is that by employing a directional grafting modification system combining vinyl silane coupling agent and tert-butyl peroxycarbonate-2-ethylhexyl peroxide, molecular-level activation modification of atactic polypropylene can be precisely performed, stably implanting polar active functional groups into the inert polyolefin molecular chain, effectively improving the chemical interfacial bonding force with the inert PET substrate, unlike traditional physical blending modification, effectively improving the long-term adhesion.

This invention relates to an anti-cavitation device and method for fluid pipelines. The invention includes a fluid pipeline with a bend; a guide vane assembly disposed within the bend to guide the fluid flow at the bend; wherein the guide vane assembly includes a guide vane body, the guide vane body including guide vanes extending towards the outlet of the bend, the guide vanes being circumferentially arranged around the axis of the guide vane body, so that the fluid forms a controlled pre-swirling flow field before entering the bend outlet. This invention, by installing a guide vane-type device at the bend of the fluid system pipeline, changes the flow direction of the liquid, avoids abrupt changes in liquid velocity at the bend, eliminates boundary layer diversion, increases the absolute pressure inside the bend, and thus improves the cavitation resistance of the entire pipeline system.

The invention relates to the technical field of adhesives, and discloses a high-filling-capacity adhesive film for an image display device, the glass transition temperature of the adhesive film is controlled between-20 DEG C and 0 DEG C, the compliance of the adhesive film is greater than 10 <-3 > Pa <-1 > at the temperature of 50 DEG C and the pressure of 1 kPa for 300 seconds, and the storage modulus of the adhesive film at the temperature of 120 DEG C and the frequency of 0.1 Hz is greater than 5000 Pa under 365 nm UV illumination. The adhesive film has the advantages of good segment difference filling effect and no bubble after standing and reliability test.

The application discloses a preparation method of a multilayer composite crosslinking ceramic flow-casting green tape, which comprises the following steps: inputting slurry into multiple interval-mounted material boxes of a flow-casting machine, making the carrier tape pass through the material boxes and making the slurry in the material boxes be stacked on the carrier tape layer by layer to be flow-cast into a multilayer composite crosslinking flow-casting green tape; the slurry comprises silicon nitride ceramic powder, a sintering aid, a solvent, a binder, a dispersing agent, a plasticizer and a crosslinking agent; the plasticizer is at least one of cashew phenol Mannich tiglic acid ester, dibutyl phthalate, dimethyl phthalate and polyethylene glycol, and the dispersing agent is at least one of fish oil, castor oil and polyvinylpyrrolidone. The obtained green tape is uniform, smooth and flat, free of cracks, wrinkles and bubbles, has good toughness and high strength, is not easy to deform, and has adjustable thickness, and the problem that a crosslinking system ceramic green tape is difficult to flow thick is solved.

This invention relates to the field of dental mixing machine technology, and more particularly to a universal dental material mixing machine. It includes a chassis with a door connected to the front side, and a mixing chamber fixedly installed within the chassis cavity. The mixing chamber contains two sets of lifting cylinders and two sets of mixing rods. Two sets of ultrasonic mixing mechanisms are installed at the top of the mixing chamber, and two sets of lifting mechanisms are installed at the bottom. A control module is installed inside the chassis. This universal dental material mixing machine places a container holding dental materials inside the lifting cylinders within the mixing chamber. Then, the corresponding mixing head is fully immersed in the material. Subsequently, the ultrasonic mixing mechanism is activated by the control module, transmitting vibration energy through the mixing head to the material to achieve molecular-level uniform mixing, which is more efficient than traditional mechanical stirring. This device achieves bubble-free, low-noise, and highly uniform mixing by using ultrasonic vibration mixing.

The invention provides an insulating sheath cable and a preparation method thereof, and the preparation method comprises the following steps: extruding an insulating material through a first extruder, and coating the surface of a conductor with the extruded insulating material to obtain an insulating layer; then, extruding a sheath material through a second extruder, and coating the sheath material on the surface of the insulating layer to obtain a sheath layer; and then carrying out segmented cooling to obtain the insulating sheath cable. According to the invention, the cable insulation layer obtained by the preparation method has good mechanical properties; basic performance requirements of the cable, such as electrical performance, insulating performance, aging resistance and the like, can be ensured, and meanwhile, the cable does not crack, and is good in appearance quality and high in production efficiency.

The invention discloses a gold-clad silver processing method and a gold-clad silver product, and relates to the technical field of metal processing. The gold-clad silver processing method comprises the following steps: S1, silver blank treatment: polishing a silver blank to be smooth so as to remove surface impurities; s3, gold coating: coating the treated silver blank with a gold layer; s4, skin puncturing is conducted, specifically, a vertebral body is used for puncturing the skin layer, and multiple exhaust holes are formed; s5, pressing: applying pressure from one end of the product to the other end of the product, and discharging residual gas in the interlayer from the exhaust hole; s6, water passing and leveling are conducted, specifically, the surface of the gold skin layer is heated and leveled through water passing so that skin pricking traces can be eliminated; and S7, wire drawing and attaching are conducted, specifically, the product is drawn to the needed outer diameter through a wire drawing machine so that the gold skin layer can be tightly attached to the silver blank. By the adoption of the technical scheme, the method has the advantages that bubbles in the interlayer are eliminated, the fitting degree between gold and silver is enhanced, and the product quality is improved.

This invention relates to the field of road construction equipment technology, and discloses a concrete curing and covering device for road construction. The device includes an L-shaped mounting frame with an adjustable membrane cylinder positioning shaft and an adjustable mounting bracket mounted on its upper part. The adjustable membrane cylinder positioning shaft is rotatably mounted between the adjustable mounting bracket and the upper part of the mounting frame. An adjustable water pipe and a pressing roller are mounted on one side of the lower part of the mounting frame. The ends of the water pipe and the pressing roller are mounted on a mounting plate. An adjustment component that drives the mounting plate to move up and down is mounted on the lower side wall of the mounting frame. Multiple spray heads are equidistantly mounted on the lower side of the water pipe, and their ends are connected to water delivery hoses. The pressing rollers are covered with protective soft sleeves. With this structure, the invention has the following advantages: the adjustable membrane cylinder positioning shaft and the adjustable mounting frame provide strong adaptability and convenient adjustment; it integrates wetting and covering functions; and the covering adheres tightly and provides high quality.

This invention provides a high-temperature conductive silver paste for a microcrystalline glass thick-film heating plate, its preparation method, and sintering process. The high-temperature conductive silver paste for the microcrystalline glass thick-film heating plate, by mass percentage, comprises: silver powder: 75-85%; composite glass powder: 1-5%; organic carrier: 10-24%. The composite glass powder comprises component A and component B in a mass ratio of 1-3:1. Component B is silicon micropowder. Component A, by mass percentage, comprises: silicon oxide: 35-50%; boric acid: 20-30%; magnesium oxide: 10-15%; aluminum oxide: 5-10%; titanium oxide: 3-5%; and zirconium oxide: 1-2%. The high-temperature conductive silver paste for the microcrystalline glass thick-film heating plate prepared by this invention has high solderability, strong adhesion, a maximum operating temperature exceeding 450℃, strong resistance to high current impact, high re-firing stability, and excellent overall performance.

The application provides a carbon fiber reinforced polycarbonate plate and a preparation method and application thereof, and the preparation method comprises the following steps: (1) drying polycarbonate resin film and carbon fiber woven cloth; (2) adopting the mode of polycarbonate resin film and carbon fiber woven cloth alternately layering to perform layering stacking, and controlling the uppermost layer and the lowermost layer to be polycarbonate resin film; (3) putting the material into a flat plate hot-pressing mold and closing the mold; (4) performing downward pressing and lifting of the flat plate hot-pressing mold after the mold is closed, repeating the process and ending the downward pressing to perform exhaust, and increasing the mold closing pressure in a gradient after the exhaust is completed to perform pressure compensation; (5) unloading the pressure of the flat plate hot-pressing mold, and cooling the obtained plate in a low-temperature flat plate mold to obtain the carbon fiber reinforced polycarbonate plate. The preparation method of the application can completely eliminate the white spot and glue deficiency of the plate, control the void ratio of the plate to be less than 0.5%, and ensure that the surface of the plate reaches A-grade smoothness.

This invention discloses a water-based coating with fire-retardant and thermal insulation functions, its preparation method, and its application, relating to the field of water-based coatings. This water-based coating with fire-retardant and thermal insulation functions, through an innovative raw material ratio, combines inorganic and organic flame retardants, along with surface-treated insulating glass microspheres and a specific ratio of inorganic hybrid emulsion, successfully enabling the coating to simultaneously possess excellent fire-retardant and thermal insulation properties. Test results of Examples 1-3 show that the coatings all achieve a 1-hour fire resistance rating, with the lowest thermal conductivity reduced to 0.042 W / (m·K), far exceeding the performance of the control example, which only possesses basic fire-retardant functions and insufficient thermal insulation performance. When this multifunctional coating is applied to building exteriors, industrial equipment surfaces, and vehicle interiors, it can effectively prevent the spread of fire, ensure personnel safety, reduce energy consumption, and improve energy efficiency.