43results about How to "Good surface adhesion" patented technology

The invention discloses a 5G high-frequency circuit board solder mask pretreatment method, which specifically comprises the following step: S1, a circuit board substrate is pretreated, specifically, the substrate is placed on a board grinding machine to be subjected to board grinding treatment, and the surface of the substrate is cleaned twice with pure water after board grinding treatment of thesubstrate. The invention relates to the technical field of high-frequency circuit board solder mask pretreatment. According to the 5G high-frequency circuit board solder mask pretreatment method, thesubstrate is placed on the board grinding machine to be subjected to board grinding treatment, the surface of the substrate is cleaned twice with pure water after board grinding treatment of the substrate, impurities on the surface of the substrate are washed away, and the circuit board substrate is dried by strong wind, wherein the grinding marks are controlled to be 10-15mm, the linear speed ofa brush plate is 10.8m/s, and a brush roller adopts a large dragging shaft. The contact surface is increased, the ink bubble phenomenon of the circuit board substrate in the ink jet printing process can be avoided, the surface oxidation of the circuit board substrate before solder resisting can be avoided, and the pretreatment effect is good.

The invention relates to a preparation method of an inorganic and organic composite coating diaphragm, and belongs to the technical field of lithium ion batteries. The preparation method comprises thefollowing steps: (1) preparing slurry: mixing 20-25 parts by weight of PVDF, 30-35 parts by weight of polyvinyl alcohol solution, 20-25 parts by weight of deionized water and 10-15 parts by weight ofa 1-1.5% CMC aqueous solution, adding 1-5 parts by weight of dispersants, 10-15 parts by weight of 1-1.5% CMC aqueous solution, 20-25 parts by weight of deionized water and 5-15 parts by weight of alumina powders, then, adding 1-3 parts by weight of coagulants and 0.5-1 part by weight of wetting agents, and carrying out stirring to obtain composite slurry; and (2) coating the composite slurry ona PE diaphragm, and carrying out drying in a drying oven at the temperature of 40-80 DEG C to obtain the inorganic and organic composite coating diaphragm. The diaphragm prepared by adopting the preparation method has excellent heat resistance, good mechanical tensile property and higher anti-stripping strength; and the method is simple and low in cost and meets use requirements of the lithium ionbattery.

The invention discloses a hydrogenated active cathode and a preparation method of the hydrogenated active cathode and an electrolytic tank with the hydrogenated active cathode. The hydrogenated activecathode comprises a conductive substrate and an active catalyst layer on the conductive substrate, and the active catalyst layer is directly formed on the surface of conductive substrate after heat treatment of nitric acid series nitrate. By means of the preparation method of the hydrogenated active cathode, the defect that the chlorine gas decomposed out in the process of heat treatment when utilizing a chloride solution as a coating solution has great harm to human body is overcome. The prepared catalyst layer of the hydrogenated active cathode is obtained by heat treatment of the nitric acid series nitrate solution with less corrosivity to a nickel base material in an oxygen atmosphere and the heat treatment of low-high-temperature two-stage burning is preferred, the preparation methodof the hydrogenated active cathode is simple, the prepared cathode is strong in corrosion resistance and is long in service life, low in electrode potential, excellent in catalytic activity and highin uniformity of the catalyst layer, and the electrolytic properties and electrocatalytic activity are both improved greatly.

The invention relates to the technical field of automotive glass, in particular to an anti-fog coating, a preparation method of the anti-fog coating and anti-fog glass. The anti-fog coating is prepared from the following raw materials: a hydrophilic copolymer, epoxy resin, a coupling agent, a curing agent and a first solvent, the hydrophilic copolymer is prepared from the following raw materials: a hydrophilic monomer, an initiator and a second solvent; the solubility of the epoxy resin in water is greater than or equal to 90%; the solubility of the hydrophilic copolymer in water is greater than or equal to 90%. The anti-fog coating disclosed by the invention can be directly coated on a glass substrate in a single layer, the production process is simplified, the production cost is reduced, and the antifogging coating has a very good antifogging effect and is not easy to peel off.

The invention belongs to the technical field of materials and especially relates to a removable vehicle paster and a preparation method and application thereof. The vehicle paster successively contains a water-based ink-jet ink-drawing layer, a primer layer, a PVC layer, a removable pressure sensitive adhesive layer and release paper. The water-based ink-jet ink-drawing layer is obtained by mixingand stirring 17-20% of water-based ink-drawing resin, 0.5-1% of a wetting agent and 79-82.5% of water. The primer layer is obtained by mixing and stirring 10-20% of water-based resin, 0.5-1% of a wetting agent and 89.5-79% of water. The removable pressure sensitive adhesive layer is composed of 20-30% of butyl acrylate, 1.5-3% of acrylic acid, 15-23% of methyl methacrylate, 0.5-2% of benzoyl peroxide, 18-30% of toluene, 27-40% of ethyl acetate, 1-5% of a curing agent, 1-5% of latex powder and 2-6% of nano-attapulgite. The vehicle paster can 100% remove residual gum, has good curved surface adhesion, and has no bubble, crease or edge warping phenomena.

The invention relates to digital image receiving materials, especially to water-based flame-retardant white bright back glue PVC. The water-based flame-retardant white bright back glue PVC comprises aflame-retardant coating, a white PVC layer, a flame-retardant glue layer and a release white silicon paper layer, which are arranged from top to bottom. The flame-retardant glue layer is composed ofthe following ingredients (by weight): 38-50% of butyl acrylate, 6-12% of methyl methacrylate, 2-6% of acrylic acid, 4-8% of propenol, 10-17% of a phosphorus-containing acrylic monomer, 3-8% of melamine, 0.1-0.3% of alkyl sulfate, 3-8% of a curing agent, 2-4% of an initiator, 1-5% of latex powder and 2-6% of nanometer attapulgite. The flame retardant property of the water-based flame-retardant white bright back glue PVC can reach the fireproofing grade of VTM-2, has high color reduction degree, 100% removes residual glue, and can be applied to water-based spray painting and portray printing equipment.

The invention relates to a heat insulation additive for a building coating and a preparation method, and belongs to the field of preparation of a building coating. The preparation method of the heat insulation additive for the building coating particularly comprises the following steps: a, adding poly vinyl alcohol cryogel, an emulsifier and sodium bicarbonate into water to mix, warming, stirringand adding hollow glass microspheres; and b, preparing a precursor solution by vinyl acetate, acrylic acid and butyl acrylate, adding the precursor solution into prepared mixed emulsion, heating to perform a thermal reaction, carrying out initiated polymerization, then cooling to the room temperature, regulating a pH value into 7, then carrying out vacuum drying to obtain enveloped hollow glass microsphere microcapsules, that is, the heat insulation additive for the building coating. The heat insulation additive for the building coating, which is prepared by the preparation method disclosed bythe invention, can improve reflectivity and weather resistance of the coating, reinforce a heat insulation effect of the coating and have the advantages of environmental protection and energy saving.

The invention discloses a polyester thin film manufacturing method. According to the polyester thin film manufacturing method, drying treatment is performed after the blending of raw materials, thereby lowering the possibility that the raw materials are degraded due to the presence of water when being machined, and improving the product quality; the temperature of an extruded molten fluid is set to 265-295 DEG C and the temperature of a quenching roller is set to 10-20 DEG C, thereby ensuring the uniform shape of a casting piece which is formed by adopting the raw materials, and providing a foundation for the stretching step; hot setting is performed after the stretching, and then cooling is performed, thereby reducing the internal stress generated during the stretching and then obtaining a high-quality polyester thin film; and double-sided corona treatment is performed after the polyester thin film is stretched, thereby enhancing the surface adhesive ability of the polyester thin film.

The invention relates to digital image receiving materials, especially to a preparation method of water-based flame-retardant grey gum type back glue PVC. The preparation method of the water-based flame-retardant grey gum type back glue PVC comprises the following steps: (1) preparing a flame-retardant coating; (2) preparing a flame-retardant glue layer; (3) coating a white PVC layer with 15-30 g/m<2> of the flame-retardant coating, drying, coating the other surface of the white PVC layer with 15-30 g/m<2> of the flame-retardant glue layer at the coating speed of 20-40 m/min, drying, gluing the white PVC layer with the release white silicon paper layer, and rolling. The flame retardant property of the water-based flame-retardant grey gum type back glue PVC prepared by the above preparationmethod can reach fireproofing grade of VTM-2; and the product has high color reduction degree, 100% removes residual glue and can be applied to water-based spray painting and portray printing equipment.

The invention discloses a sealing device for a hub bearing unit of an agricultural machine. The sealing device comprises an outer side sealing assembly clamped on the inner wall of an oil seal cavity, a middle sealing assembly sleeving a rotating shaft and an inner side sealing assembly clamped in the outer side sealing assembly. The inner side sealing assembly is closer to the bearing unit than the middle sealing assembly. The sealing device for the hub bearing unit of the agricultural machine is more reliable in sealing performance, so that the sealing reliability of the sealing device for the hub bearing unit of the agricultural machine under poor outdoor operation conditions is improved, hub unit failures caused by sealing failure are reduced, and production efficiency of the agricultural machine is improved.

A disclosed polyformaldehyde product surface processing method comprises: performing roughening treatment on the surface of a polyformaldehyde product, destroying the crystallization zone of the surface, cleaning the polyformaldehyde product surface subjected to roughening treatment, and immersing in an acid solution to perform surface acidifying treatment, so as to form a continuous netted micropore structure on the surface of the polyformaldehyde product. According to the processing method, the mechanical roughening manner is firstly employed for performing roughening treatment on the polyformaldehyde product, then the acid solution is utilized to process the polyformaldehyde product for forming the netted micropore structure on the product surface, and by utilizing the netted micropore structure, coating or electroplated-layer molecules permeate pores and an fixedly-connected integral body is formed by the molecules and polyformaldehyde, so that the surface adhesion property of the polyformaldehyde product is improved, the bonding force between the polyformaldehyde product surface and paint or an electroplating material is improved, the application of polyformaldehyde is enlarged, and the service life of a coating or an electroplated layer on the surface of the polyformaldehyde product is prolonged.

The invention discloses an ultraviolet light-cured PVC (polyvinyl chloride) anti-dirt paint. The anti-dirt paint comprises the following raw materials in percentage by weight: 20%-25% of aliphatic polyurethane diacrylate, 20%-23% of aliphatic polyurethane tetraacrylate, 8%-10% of TMPTA (trimethylolpropane triacrylate), 8%-15% of HEMA (hydroxyethyl methacrylate), 10%-15% of tetrafluoropropyl acrylate, 10%-15% of TPGDA (tripropylene glycol diacrylate) and 0.3%-0.5% of leveling agent. The paint disclosed by the invention has the advantages of good surface adhesion and relatively good anti-dirt effect against PVC substrates.

A structured barrier-exhaust-type mask with a support relates to personal protective equipment, and specifically to masks intended primarily for use in the field of medicine. The present mask can serve as all-round environmental and hygiene protection for doctor and patient during the delivery of medical care of any degree of complexity, including long surgical procedures, and also as personal protection for civilians against airborne infection. The mask completely prevents exhaled air from passing between doctor and patient, and exhausts exhaled air in a given direction. The mask comprises ahollow structure which forms a mask cavity in the facial region and is designed in the form of a channel having an inlet and an outlet for the passage of an air flow, said mask being characterized inthat the inner and outer walls of the structure are made of an air-impermeable material, and a support is provided between the surface of the face and the inner wall of the structure, said support being in the form of an ergonomic cushion around the mouth region, or an arc running along the lower or upper jaw.

The invention discloses a pen-type insulin injector detection pretreatment driving tool, which belongs to the technical field of medical equipment inspection, and its structure includes a rotation system and a linear motion system. Carry out linear motion; the rotary system includes a chuck, the front of the chuck is used to clamp the pen-type insulin syringe, and the rear of the chuck is connected to the first rotary drive mechanism; the linear motion system includes a linear guide rail and a slider, and the top of the slider and the rotary system Fixed connection, the bottom of the slider is movably installed on the linear guide rail and can move along the linear guide rail. The technical scheme of the example of the present invention can drive the pen-type insulin syringe to rotate and advance, assist the pretreatment before the injection dose accuracy inspection, save manpower and improve efficiency.

A polishing agent used for automobiles is disclosed. The polishing agent is prepared from, by weight, 8-15 parts of citric acid, 10-20 parts of glacial acetic acid, 5-10 parts of cinnamic acid, 5-12 parts of salicylic acid, 20-50 parts of glycerol, 30-80 parts of polyethylene glycol 8000, 100-200 parts of divalent acid ester, 2-8 parts of polyoxyethylene oleyl ether, 5-12 parts of nanometer titanium dioxide, 3-5 parts of nanometer silica, 5-9 parts of nanometer zinc oxide and 20-30 parts of an auxiliary agent. The citric acid, the glacial acetic acid, the cinnamic acid and the salicylic acid which are diacids and low in corrosion are adopted to replace strong acids and strong alkalis and are dissolved into the divalent acid ester, and therefore oxides on the surface of automobile paint can be rapidly cleaned. The nanometer titanium dioxide, the nanometer silica and the nanometer zinc oxide can increase surface adhesion force of the polishing agent and improve activity of the polishing agent. Through cooperation of the auxiliary agent, paint surfaces can be rapidly polished through friction and a protection film is formed on the surface layer of the paint.

The invention relates to the field of fabric, in particular to a breathable textile fabric and a preparation method thereof. The breathable textile fabric comprises interwoven antibacterial warp yarnraw silk, weft yarn raw silk and second warp yarn raw silk; based on parts by weight, the antibacterial warp yarn interwoven raw silk comprises 4-10 parts of absorbent fibers, 3-9 parts of jute fibers, 2-4 parts of silk fibers and 2-4 parts of antibacterial coating; the weft yarn raw silk comprises 5-12 parts of ultra-fine activated carbon fibers, 4-12 parts of polyester fibers, 3-9 parts of aramid fibers and 1-3 parts of ramie fibers; and the second warp yarn raw silk comprises 3-9 parts of nano carbon fibers, 3-8 parts of bamboo charcoal fibers and 2-6 parts of 15D polyester staple fibers. According to the breathable textile fabric provided by the invention, the component compatibility of the wrap yarns and the weft yarns of the fabric are limited, so that the obtained textile fabric ishigh in air permeability and comfort, simultaneously has the functions of absorbing sweat and sterilizing clothes, can reduce the probability of occurrence of peculiar smell, and can effectively prolong the service life of clothes.

The invention relates to a positioning device based on a push-pull test and a positioning method. A sliding assembly is mounted on the upper portion of a mounting plate. A connecting plate and an adsorption base connected with the connecting plate through a force sensor are arranged on the sliding assembly. A driving device is arranged on the mounting plate. An adsorption support is connected to the bottom of the left end of the adsorption base. A cylindrical rubber-coated suction nozzle is arranged at the upper end of the adsorption support, and the lower end of the adsorption support is connected with an air pipe through a miniature air circuit connector. The driving device drives the connecting plate to ascend so as to drive the cylindrical rubber-coated suction nozzle to ascend to make contact with keys, the keys are subjected to adsorption force and tension and pressure from the cylindrical rubber-coated suction nozzle to generate friction force F1, and the force sensor feeds back the magnitude of the friction force F1 in real time. Friction force F2 is generated when an upper panel moves relative to the keys, when the friction force F1 is greater than the friction force F2, the keys are in a static state, the friction force F2 can be overcome when the upper panel moves relative to the keys, and therefore the keys and the upper panel are aligned, and the keys are reliably positioned.

The invention relates to the technical field of electroplating, in particular to a connector coating process. The connector coating process comprises the following steps of pretreating the surface of an electric connector; electroplating a copper layer on the surface of the pretreated electric connector; electroplating a palladium layer on the surface of the copper layer; and electroplating a precious metal layer on the surface of the palladium layer. The copper layer and the palladium layer are arranged on the surface of the electric connector at the same time, then the precious metal layer is electroplated, a base body of an existing electric connector is generally made of copper, the copper layer can prevent the base body of the electric connector from being damaged by subsequent electroplating, and the conductivity of the electric connector can be effectively guaranteed; the copper layer can be well blocked by the palladium layer, outward diffusion of the base body and the copper layer is avoided, and meanwhile damage to the base body during subsequent electroplating of the precious metal layer can be avoided; and the precious metal layer can effectively improve the conductivity of the electric connector.