84results about How to "Does not affect permeability" patented technology

The invention discloses a PVB (polyvinyl butyral) film for dynamically rejecting infrared rays and resisting ultraviolet rays and a preparation method thereof. The functional PVB film comprises cesium tungsten bronze, antimony indium oxide, indium tin oxide, titanium dioxide, nano carbon spheres, zirconium carbide, PVB resin powder, a plasticizer, a trace improver and the like. The preparation method comprises the following steps: dispersing the cesium tungsten bronze composite nanoparticles with a solvent, adding the plasticizer, stirring uniformly, adding the PVB resin powder and trace improver, thoroughly mixing, and carrying out film formation on the mixture by running to obtain the heat-insulation ultraviolet-resistant PVB film. The ultraviolet rejection ratio of the PVB film is greater than 99.0%, the visible light transmittance is adjustable within the range of 60-85%, and the infrared rejection ratio is up to 80-99%; and the PVB film can be directly used for producing heat-insulation infrared / ultraviolet-resistant safety laminated glass, can be widely used in architectural curtain walls, doors / windows, zeniths, automobile windshields and the like, and is a novel energy-saving film material.

The invention discloses a method for preparing a carbon-doped titanium dioxide composite material, comprising the following steps of: fully mixing a TiCl3 solution at the mass concentration of 10%-20% and a sucrose solution at the mass concentration of 1%-10% according to the volume ratio of 1:1-6 with magnetically stirring; placing the mixed solution into a thermostat to perform a reaction at the temperature of 100-150 DEG C for 6-12 hours to hydrolyze TiCl3 and carbonize the sucrose to form an amorphous titanium dioxide-carbon composite material; washing the obtained substance with an organic solvent for 3 to 7 times, and washing with distilled water for 3 to 7 times, followed by drying; crushing the obtained substance, placing the ground substance into an activation furnace, adjusting the temperature to 400-700 DEG C at the heating rate of 3-5 DEG C / min under the protection of nitrogen, calcining at constant temperature for 2-6 hours to produce the needed product. According to the invention, titanium dioxide is embedded in translucent carbon films to form tiny briquettes, thus overcoming the shortcoming that nanometer TiO2 is not easy to settle in a water solution and is difficult to recycle.

The invention belongs to the chemical field, and relates to a preparation method of an organosilicon powder waterproofing agent; the method comprises the following steps: preparing a solution of a water-soluble film-forming substance; stirring and mixing an ultrafine mineral carrier and an organosilicon high-efficient waterproofing agent according to a certain proportion to form a homogeneous binary disperse system; adding the binary disperse system into the solution prepared by the water-soluble film-forming substance, well mixing to form a homogeneous ternary disperse system; performing vacuum drying of the homogeneous ternary disperse liquid to obtain a dried polymer rigid block; cooling to room temperature; pulverizing the obtained dried polymer rigid block to powder with a certain fineness. The equipment used by the invention is simple and easy to operate; the finished product of an organosilicon powder waterproofing material is suitable for the practical application of building waterproofing; the organosilicon waterproofing agent prepared by the invention is white or offwhite powder, and has outstanding waterproofing effect with a low mixing amount; the powder is easy to redisperse, has good water workability, is convenient for practical application, has solvent-free design, and is environment friendly.

The invention discloses a method for reinforcing aeolian sandy soil by polypropylene fibers. The method comprises the following steps: selecting materials for preparing fiber aeolian sandy soil, wherein the length of the polypropylene fiber is 18mm, the mix ratio of the fiber is 0.3 percent, and the aeolian sandy soil materials are air-dried aeolian sand or aeolian sandy soil (the moisture content accounts for 11.2wt%); according to the proportioning scheme, closely and completely mixing fine TEXSOL with aeolian sandy soil particles by way of spraying, so that a composite three-dimensional spatial structure is formed by the TEXSOL and the aeolian sandy soil; and carrying out mechanical compaction on the composite fiber aeolian sandy soil subjected to spraying, wherein the compaction method and standard of the composite fiber aeolian sandy soil are same as those of common soil, so that the compaction density of the aeolian sandy soil reaches 100 percent of the standard compaction density, and the fiber aeolian sandy soil is compacted closely. By utilizing the method in earth-filled dams, retaining walls and the drainage works of the earth-filled dams, the water stability of the interior of the soil body can be effectively improved, the shearing strength and tensile strength of the soil body can be obviously improved, and the construction process is simple; and because the fiber content of the fiber aeolian sandy soil is very low, the method has the advantages of cheapness and environmental protection.

The invention provides an electronic component cleaning agent which comprises the following ingredients in percentage by mass: 50-75% of magnetic water, 2-14% of organic base, 15-35% of surfactant and 0.1-1.0% of chelator. The electronic component cleaning agent provided by the invention is low in cost, wide in raw material sources and high in cleaning capability. can effectively remove pollution of metal ions, can not damage the integrity of an electronic component, can not influence the current-illumination characteristic, electromagnetic characteristic, permeability, surface physical characteristic and other properties of the electronic component, and is environment-friendly and pollution-free. Thus, the electronic component cleaning agent can be widely used for cleaning in the manufacturing processes of electronic components, integrated circuits, PCBs (printed circuit board), liquid crystal displays and the like, and has a wide application range.

The invention relates to a hydrogel preparation for improving the permeation of an active component glycyrrhetinic acid and / or its salt through a barrier via skins, its preparation method, and its application in the dermatology. The glycyrrhetinic acid hydrogel preparation comprises 0.01-10wt% of the active component glycyrrhetinic acid and / or its salt, 0.01-10wt% of a gel matrix, 0.01-10wt% of a humectant, 0.01-5wt% of an antiseptic, 0.01-5wt% of a pH adjustment agent, and the balance water. The glycyrrhetinic acid hydrogel preparation has the advantages of simple preparation method, good storage stability, substantial improvement of the penetration amount through the skins, no irritation or anaphylaxis, good absorbency, and good safety, and can be used for preparing medicinal preparations for treating dermatoses comprising chronic urticaria, eczema, contact dermatitis and the like through skin administration.

The invention belongs to the field of functional polymer membrane preparation, and in particular relates to a polyethylene micropore diaphragm which is used for improving the use security of a lithium ion battery and contains an organic / inorganic composite cross-linking coating, and a preparation method of the polyethylene micropore diaphragm. The preparation method comprises the following steps: by taking aromatic polyester polyhydric alcohol and aromatic isocyanate as basic components, preparing a coating liquid by combing with a cross-linking agent, a foaming agent, a catalyst and inorganic nano packing at a certain ratio, coating at least one surface of the polyethylene micropore diaphragm with the coating liquid, and curing at certain temperature, thereby forming an organic polymer / inorganic nanoparticle composite cross-linking coating of a pored foamed structure on the surface of the polyethylene micropore diaphragm. Relatively high porosity and air permeability of the polyethylene micropore diaphragm are maintained, at the same time the thermal shrinkage membrane breaking temperature is greatly improved, and the use security property of the battery can be remarkably improved when the polyethylene micropore diaphragm is used as a power lithium ion battery diaphragm material.

The invention relates to a multi-dimensional porous electrode applied to a flow battery, and a preparation method and an application of the multi-dimensional porous electrode. The multi-dimensional porous electrode comprises a porous electrode framework formed by carbon fibers through lap jointing, gluing or weaving; second-stage holes are distributed in the surfaces of the carbon fibers; and third-stage holes are distributed in the inner surfaces of the second-stage holes. The multi-dimensional porous electrode can be applied to an all-vanadium redox flow battery; and when the porous electrode is applied to the all-vanadium redox flow battery, the current efficiency of the battery can reach 98% or above, the energy efficiency can reach 89%, the operating current density can reach 200mAcm<-2> or above, and the effective operating time can be more than 500 hours.

The invention provides a novel LED (light-emitting diode) transparent display screen which comprises multiple display units, wherein each display unit comprises substrate glass, multiple rows of LED integrated lamps and shield glass; multiple groups of wire slots which are arranged side by side are arranged on first sides of the substrate glass; conducting materials are arranged in the wire slots in a screen printing manner; the LED integrated lamps are adhered to the conducting materials; the shield glass is arranged on the first sides of the substrate glass and covers the LED integrated lamps; the shield glass and the substrate glass are formed by glue sandwiching; accommodating tanks are arranged in positions, corresponding to the LED integrated lamps, of the shield glass; the LED integrated lamps are accommodated in the accommodating tanks. The novel LED transparent display screen provided by the invention not only has high pixel density but also has quite good permeability.

The invention discloses a method for preparing a nano composite polyvinylidene fluoride hollow fiber membrane through three-layer co-extrusion and co-extrusion equipment, and belongs to the technicalfield of membranes. The preparation method comprises the steps of 1) putting polyvinylidene fluoride resin and an additive into a solvent or a diluent, uniformly dissolving, and defoaming to obtain apolyvinylidene fluoride membrane casting solution; 2) uniformly dispersing a nano functional material into the polyvinylidene fluoride solution to prepare a nano functional material solution; 3) performing double-layer co-extrusion on the polyvinylidene fluoride membrane casting solution and the nano functional material solution by using a three-layer channel spinning nozzle; and 4) finally, immersing a polyvinylidene fluoride hollow fiber membrane blank into a coagulating bath tank for phase inversion, and curing to form the nano composite polyvinylidene fluoride hollow fiber membrane. According to the method for preparing the nano composite polyvinylidene fluoride hollow fiber membrane through three-layer co-extrusion and the co-extrusion equipment, the modification process does not influence the flux, solute interception and other properties of the membrane, the nano-functional layer compounded on the surface is not prone to falling off, and better stability and better modificationeffect are shown.

The invention discloses a multilayer through-hole high-permeability polymer micro-filtration membrane. The multilayer through-hole high-permeability polymer micro-filtration membrane comprises a polymer micro-filtration membrane body, a multilayer porous structure in the polymer micro-filtration membrane and silicon dioxide microspheres distributed on the hole walls, wherein the micro-filtration membrane has a two-layer, three-layer or four-layer multilayer porous structure by utilizing a breath pattern method and controlling different process parameters. The multilayer through-hole high-permeability polymer micro-filtration membrane has the beneficial effects that the polymer micro-filtration membrane has the multilayer porous structure, the through holes are regularly and densely distributed, the aperture is uniform, the orderness is high, the thickness of the hole wall is moderate, the structure is stable, and the mechanical performance of the micro-filtration membrane can be greatly improved; and the modified silicon dioxide microspheres are uniformly distributed on the hole wall of the micro-filtration membrane, and the silicon dioxide has high hydrophilic performance, so thatthe hydrophilic performance of the polymer micro-filtration membrane can be improved, the layer number and the permeability of the micro-filtration membrane can be improved, and the polymer micro-filtration membrane is better in separation capability.

The invention relates to a method for preparing a carbon cathode material of a lithium ion battery, the carbon cathode material prepared by the method and the lithium ion battery prepared from the carbon cathode material. The method for preparing the carbon cathode material of the lithium ion battery orderly comprises the steps of: (1) material selection; (2) grinding; (3) mixing-reforming; and (4) graphitization or charring and graphitization. The preparation method is based on the theory of selective catalysis possessed by iron series compounds in a process of reforming raw materials meeting the requirements of characteristic values, in complex phase reactions such as complex depolymerization, hydrogen migration, condensation and the like of heavy hydrocarbons with functional groups and during the charring or graphitization of reformates, so that the defects in internal structures of the materials are improved, the extent of ordered arrangement of material molecules is improved, and the aim of improving the compressive performance of specific cathode materials is finally achieved.

A process for preparing the high-brightness pearl which contains composite magnesium carbonate crystals includes such steps as immersing pearl in the solution of magnesium hydroxide in ammonia water under sufficient illumination, drying, adding assistant to low-carbon alcohol, immersing said pearl in it, and drying.

The invention discloses a culture device and method for activity detection of soil hydrocarbon oxidation bacteria. The culture device comprises a detection bottle (1) and an injection needle capable of being inserted into the detection bottle (1), wherein the detection bottle (1) is a container or a device capable of forming an airtight space; a bracket (5) is arranged inside the detection bottle; water is formed below the bracket; a loading net (4) is paved and covered on the bracket; sealing of the detection bottle comprises sealing of a rubber plug (3) and a perforated cover (2). When the device is used, a gas is injected into or sucked from the detection bottle by the injection needle penetrating through the rubber plug. The culture device is improved on the basis of activity detection of the conventional soil hydrocarbon oxidation bacteria, the humidity inside the culture device can be increased, the gas permeability of a soil sample can be ensured, the methane utilization rate of methane-oxidizing bacteria and the hydrocarbon consumption rate of hydrocarbon oxidation bacteria are improved, and the reliability of activity detection is ensured. Thus, reliable technical means is supplied for application of a microbiological exploration technology.

The invention discloses a bacteriostatic and water-absorbing functional wet tissue. The functional wet tissue is composed of a carding fiber layer, a modified hot-melt fiber net layer, a hot-rolled fiber net layer and a water absorbing fiber net layer through spunlace reinforcement. The bacteriostatic and water-absorbing functional wet tissue comprises chitosan fibers, bamboo pulp fibers and othermaterials good in bacteriostatic property and water absorption, and is soft in texture, capable of absorbing water and inhibiting bacteria, comfortable to use, high in wet strength, capable of caringskin, capable of being circularly used and recycled, capable of saving energy, good in biodegradability and biological regulation, and free of pollution to the environment; a non-woven fabric has anantibacterial function, functional finishing is carried out, and a bacteriostatic agent and a preservative do not need to be added in soaking liquid, so that the wet tissue is safe to use and free ofirritation; the processing process is simple, water used in the preparation process can be recycled, and energy and the cost are saved.

The invention relates to the technical field of new building ceramic materials, and particularly discloses a composite process antibacterial ceramic tile and a preparation method thereof. The composite process antibacterial ceramic tile comprises a green body layer and an antibacterial glaze layer, glaze of the antibacterial glaze layer contains a first antibacterial agent, and surface micropores of the antibacterial glaze layer are filled with an antibacterial antifouling agent; and the first antibacterial agent comprises zinc silicate and / or zinc aluminate, the antibacterial antifouling agent contains a second antibacterial agent, and the second antibacterial agent comprises nano zinc phosphate and / or nano zinc zirconate. The preparation method comprises the following steps: preparing the green body layer, preparing the antibacterial glaze slip, spraying the antibacterial glaze slip on the surface of the green body layer, sintering to obtain a semi-finished product, polishing the semi-finished product, and polishing the surface of the semi-finished product by using an antibacterial antifouling agent to obtain the antibacterial ceramic tile. According to the antibacterial ceramic tile, a composite antibacterial technology combining in-glaze antibacterial and glaze layer surface micropore antibacterial is adopted, efficient and lasting antibacterial of a ceramic tile product is achieved, antibacterial components do not affect permeability of a glaze surface, and the antifouling performance of the glaze surface can be achieved.

The invention relates to a preparation method of a black flame-retardant PBT composite material capable of being welded by laser. The preparation method comprises the following steps: adding a raw material I into a main side feeding port of a double-screw extruder, adding a raw material II into a fourth section side feeding port of the double-screw extruder, extruding and granulating, controlling the rotating speed of a screw machine of the double-screw extruder to be 180-600 revolutions per minute and the extruding temperature of the double screws to be 235-275 DEG C, and preparing the black flame-retardant PBT composite material capable of being welded by laser; the length-diameter ratio of the twin-screw extruder is 40: 1; the raw material I is a mixture of 70-90 parts by mass of PBT resin A, 8-10 parts by mass of a flame retardant and 0.3-1.5 parts by mass of black powder, and the raw material II is a mixture of 10-20 parts by mass of PBT resin B and 0.2-3 parts by mass of potassium N-butylpiromate; the prepared black flame-retardant PBT composite material capable of being welded by laser has excellent laser welding capacity and good temperature resistance, is halogen-free and flame-retardant, meets the requirements of ROHS and Reach regulations, and can be used for producing black parts with flame-retardant requirements.

The invention discloses a preparation method of a graphene oxide nanofiltration membrane. Firstly, a graphene oxide water solution is prepared; amine monomers are added to the graphene oxide water solution, and a graphene oxide water-based membrane casting solution is prepared; a high-molecular polymer ultrafiltration membrane is taken as a base membrane, the base membrane is dipped with a layer of graphene oxide water-based membrane casting solution with a surface coating method and then dipped with an oil phase, the graphene oxide water-based membrane casting solution and oil-phase monomersare subjected to an interfacial polymerization reaction, a product is dried at 60-100 DEG C for 5-10 h, and the graphene oxide nanofiltration membrane can be prepared. In the prepared graphene oxide nanofiltration membrane, sub-micro sheet layers of graphene are staggered in parallel, a compact filtering layer is formed and completely covers holes of a support membrane, filtrate is filtered in a cross flow manner, impurities are stacked on the surface, and the cleaning effect can be obtained after parallel washing, so that the nanofiltration membrane has excellent filtering capability and staining resistance, and the service life is notably prolonged.

The invention relates to a high-penetration non-shrink epoxy grouting material. The high-penetration non-shrink epoxy grouting material is formed by a component A and a component B, The component A comprises the following raw materials in parts by mass: 60-80 parts of epoxy resin, 20-35 parts of an active diluent, 10-20 parts of alumina short fiber, and 3-5 parts of an oxidizing agent, the component B comprises the following raw materials in parts by mass: 10-20 parts of a curing agent, 8-12 parts of benzyl alcohol, 4-8 parts of a vinyl modifier, and 2-4 parts of a catalyst. Compared with theprior art, the high-penetration non-shrink epoxy grouting material has the following advantages that alumina fiber is used for enhancement, and the grouting material has good corrosion resisting performance and high intensity; the selected curing agent contains eight amino caged polysilsesquioxanes, and the grouting material after complete solidification has high crosslinking density and intensity; the vinyl modifier is used for modification, and the grouting material has high toughness.

The invention discloses an adhesive for a PET-PVC composite film. The adhesive is prepared by matching epoxy resin-acrylate polymer emulsion prepared according to a core-shell polymerization method with a curing agent and other ingredients. The adhesive is good in adhesive effect, and the PVC and PET films can be firmly adhered under the condition that the adhesive layer is thin, so that the phenomena that the composite film cracks during cutting and the like are avoided. Moreover, the adhesive is high in transparency and does not influence the permeability and glossiness of the composite film, and the composite film prepared by using the adhesive is high in aesthetic property.

The present invention discloses an efficient and environmental-protection liquid crystal display screen cleaning agent, which comprises the following raw materials by weight: 36-44 parts of fatty alcohol polyoxyethylene ether, 18-25 parts of metasilicate, 16-20 parts of glycerol, 8-14 parts of amine alkali, 15-35 parts of a surfactant, 6-9 parts of a chelating agent, and 50-75 parts of deionized water. Compared to the liquid crystal display screen cleaning agent in the prior art, the liquid crystal display screen cleaning agent of the present invention has advantages of low cost, wide raw material source, strong cleaning capability, less consumption, effective metal ion pollution removing, environmental protection and no pollution, cannot damage the integrity of the liquid crystal display screen, and cannot not affect the photoelectric property, the electromagnetic property, the permeability, the device surface physical properties and other performances.

The invention discloses a nucleated pearl processing technology. The technology comprises steps as follows: a), pearls are soaked in a pretreatment liquid for 25-35 h at the temperature of 10-15 DEG C, the pretreatment liquid is prepared from sodium bicarbonate and distilled water through mixing, 10-15 g of sodium bicarbonate is added to 1000 ml of distilled water, and then washing and natural drying are performed; b), the pearls obtained in the step a) are poured into a brightening device containing a treatment liquid and soaked for 3-5 d at the temperature of 10-20 DEG C, then washing and natural drying are performed, and the treating liquid is prepared from components in parts by mass as follows: 10-20 parts of polyethylene glycol, 10-20 parts of glycerin, 4-6 parts of methylene blue and 900-1000 parts of deionized water; and the like. Compared with the prior art, the technology has the advantages that the brightening effect can be good, transparency of the pearls is not affected, bleaching effect is good, pearl damage is reduced, efficiency is improved, and color and luster is uniform.

The present invention relates to the field of ecological restoration and desert control, especially to applications of etherified corn starch, a sand fixation water retention agent, and a preparation method of the sand fixation water retention agent. The technical scheme for achieving the purpose of the present invention comprises applications of etherified corn starch in sand fixation water retention, a biodegradable sand fixation water retention agent containing the etherified corn starch, and a preparation method of the biodegradable sand fixation water retention agent. According to the present invention, the corn starch and the plant cellulose are adopted as the main raw materials, other chemical components are not contained, and advantages of no environment pollution, biodegradability, strong water absorption, rich nutrition elements, and plant growth promoting are provided.

A tip filter of cigarette is prepared through spraying propolis tincture onto acetate fibres, drying by overheat air to water content not exceeding 7% and rolling to form the tip filter. It can prevent tar from coming into human body to cause cancer, sterilizing respiratoy system and oral cavity, and has the unique effect of giving up smoking.

The invention provides a nitrogen-doped aramid-based enhanced multistage hole carbon fiber preparation method. The preparation method comprises the following steps: adding metal salt of citric acid inaramid pulp, uniformly mixing the materials to prepare spinning liquid, and performing static spinning to prepare aramid as-spun fiber containing the metal salt of citric acid; placing the aramid as-spun fiber containing the metal salt of citric acid in oxygen atmosphere, performing pre-oxidation treatment, placing the material in ammonia gas-containing atmosphere for carbonization treatment to obtain the nitrogen-doped aramid-based porous carbon fiber; dipping the nitrogen-doped aramid-based porous carbon fiber in the diluted aramid pulp, taking the material out, and drying the material to obtain the nitrogen-doped aramid-based enhanced multistage hole carbon fiber. The porous carbon material takes the aramid pulp and the metal salt of citric acid as carbon source, the as-spun fiber is prepared through static spinning, the nitrogen-doped aramid-based porous carbon fiber is prepared through pre-oxidation and carbonization treatment, and then is enhanced by the aramid pulp to obtain the product, the product has multiple holes, and the electromagnetic adsorptivity is strong.

The invention discloses an S-shaped LED (light emitting diode) display screen and a connector thereof. The S-shaped LED display screen comprises a plurality of LED light bars and connectors for connection of the LED light bars. Each connector comprises a first connector, a second connector and a rotating shaft, one end of each first connector and one end of each second connector both sleeve the corresponding rotating shaft and, each first connector and each second connector are capable of rotating around the corresponding rotating shaft, and a space is reserved between each first connector and the corresponding second connector. Each connector is positioned at the same end of two LED light bars, the other end of each first connector is connected with one LED light bar, the other end of each second connector is connected with the other LED light bar, and the ends of the two LED light bars are positioned on the same horizontal line. The LED light bars are connected through the rotating shaft type connectors to form the S-shaped LED display screen, so that rotation radian of the S-shaped LED display screen is increased; the rotating shaft type connectors are less prone to breakage during large-angle rotation of the LED display screen, and accordingly yield is increased.

The invention discloses a waste mud dehydration and solidification treatment method which adopts a multi-layer vacuum treatment method, and a plurality of layers of horizontal plastic drainage platesand a plurality of rows of vertical plastic drainage plates are laid in a mud pit, so that the problem of insufficient lower-layer mud treatment effect is solved, and the solidification speed is increased; multi-layer horizontal drainage can be achieved only by filling slurry and precipitating in batches, multi-layer vacuum is formed in the slurry through the multi-layer horizontal drainage system, the drainage path is shortened, and the drainage effect is better; moreover, the flocculating agent is also adopted, so that the vacuum dehydration effect and the solidification speed can be improved, meanwhile, a curing agent is added, soil solidification is realized while vacuum dehydration is performed, and further treatment is not needed; by adopting the method, the treatment speed of the waste mud can be rapidly increased, and the curing effect of the waste mud is enhanced.

The invention relates to a whitening composition and a skin care product containing the same and belongs to the technical field of cosmetics. The whitening composition disclosed by the invention is prepared from snow lotus herb extract, lilium candidum bulb extract and patrima villosa root extract, wherein the weight ratio of the snow lotus herb extract, the lilium candidum bulb extract and the patrima villosa root extract is that the snow lotus herb extract to the lilium candidum bulb extract to the patrima villosa root extract is equal to (12 to 18) to (4 to12) to (3 to 7). The skin care product disclosed by the invention contains the whitening composition disclosed by the invention. The whitening composition disclosed by the invention is prepared from the three active ingredients of the snow lotus herb extract, the thelilium candidum bulb extract and the patrima villosa root extract and has an excellent skin brightening and whitening effect.

The invention relates to an air knot type yarn knotting method for knotting a first yarn and a second yarn. The air knot type yarn knotting method comprises the following steps: one section of the first yarn is measured from the head end of the first yarn, and one section of the second yarn is measured from the tail end of the second yarn; an air blowing knotting machine is selected according to densities of the first yarn and the second yarn, and the air pressure of the air blowing knotting machine is adjusted; the first yarn penetrates through a first clamping port and a fourth clamping portin sequence, and the second yarn penetrates through the second clamping port and a third clamping port in sequence; or the first yarn penetrates through the second clamping port and the third clamping port in sequence, and the second yarn penetrates through the first clamping port and the fourth clamping port in sequence; the first yarn and the second yarn are knotted through the air blowing knotting machine after intersection; and the knotted section of the second yarn and the knotted section of the first yarn are blown to the knotting side through an air blowing outlet to form knotted yarns. The knotting method can be applied to enable the yarns to smoothly penetrate through yarn guide holes, and facilitates industrial application.