37results about How to "Combined fastening" patented technology

The invention discloses wood wax oil for maintenance and decoration of buildings, furniture and the like and preparation technology thereof. The wood wax oil contains wood oil, linseed oil, catalpa oil, perilla oil, pine oil, castor oil, rosin modified resin, bee wax or wood wax and turpentine oil, wherein the content of each component is 5 to 10 percent; and each component is a pure natural extract. The preparation technology for the wood wax oil comprises the following steps: polymerizing the wood oil, the linseed oil, the catalpa oil, the perilla oil, the pine oil, the castor oil, the rosin modified resin and the bee wax or the wood wax at a high temperature of between 290 and 300 DEG; adding the turpentine oil into the polymerized product to dilute; filtering the mixture; and adding a drier into the filtered product to adjust. The wood wax oil has the advantages of natural health, good durability and permeability, and recoverability.

The present invention provides a method for preparing a metal-organic framework compound by using a Co-containing metal-organic framework compound (Metal-Organic Framework, the invention relates to acomposite material formed by loading one-dimensional rod-like Co3V2O8 on a porous carbon box (PCB) obtained by MOF pyrolysis, a preparation method of the composite material and an application of the composite material in a lithium ion battery negative electrode material. The preparation method disclosed by the invention comprises the following steps: preparing a zeolite imidazate skeleton-67 (Zeolitic Imidazolate Frameworks-67, ZIF-67) with a controllable morphology; the preparation method comprises the following steps: taking Co3V2O8 as a template precursor, carrying out high-temperature pyrolysis, carrying out acid pickling to remove Co, carrying out ultrasonic dispersion on the obtained porous carbon box in a solution, carrying out self-assembly by taking the porous carbon box as an internal skeleton through a hydrothermal process, and adhering Co3V2O8 to the surface of the porous carbon box and embedding Co3V2O8 into pores to form the composite material. The whole experiment process does not generate toxic and dangerous substances, the operation is simple and easy to implement, the Co3V2O8-coated PCB has a high specific surface area and a porous structure, the multiplying powerand the cycle performance of the lithium ion battery are effectively improved through the synergistic effect of the composite material, and the Co3V2O8-coated PCB is an excellent lithium ion batterynegative electrode material.

The invention discloses a coupler which comprises a first half coupler and a second half coupler which are provided with coupling bodies; the coupling bodies are respectively provided with a locating hole passing through the upper and the lower end surfaces of the coupling bodies; at least two convex blocks extends at one end of the coupling bodies in a convex way, and an inserting hole is formed between the two adjacent convex blocks; and the convex block and the inserting hole of the first half coupler can be blocked and jointed with the inserting hole and the convex block of the second half coupler. As the convex block of the first half coupler and the convex block of the second half coupler are blocked and jointed with each other in a crossing way, the coupler has simple structure, easy fabrication, convenient assembly and compact combination. Furthermore, as the coupling bodies of the first half coupler and the second half coupler are provided with the locating holes which are matched with shaft ends of connected shaft bodies, the combination is firm, and the coupling bodies and the connected shaft bodies can be prevented from sliding.

The invention particularly discloses breathable three-dimensional shoe upper structures. Each breathable three-dimensional shoe upper structure comprises a mesh fabric base layer, a mesh fabric surface layer, and a three-dimensional offset printing layer and a bonding layer which are located between the mesh fabric base layer and the mesh fabric surface layer. Each three-dimensional offset printing layer sequentially includes, from bottom to top, an oily varnish layer, a water-based solid gold oil layer, a foaming paste layer and a dot printing layer. Each three-dimensional offset printing layer covers a part of the respective mesh fabric base layer. Each mesh fabric surface layer is in hot press connection with the respective mesh fabric base layer and the respective three-dimensional offset printing layer through the respective bonding layer respectively. The invention also discloses a process for making the breathable three-dimensional shoe upper structures. According to the technical scheme, not only are seam-less integrated shoe uppers achieved, but also a strong three-dimensional decorative feeling of the non-topmost layers of the shoe uppers is formed, and the shoe upper structures have stereotyped supporting effects on the entire shoe uppers, so that the shoe uppers have good tightness and attractive appearance. Printing patterns can be observed directly through the mesh fabric surface layers, the layers of the shoe uppers are firmly bonded, and shoes are firm and wearable.

The invention relates to a binding head of a surgical incision binding apparatus and belongs to the technical field of medical apparatus and instruments. The binding head comprises a nail anvil and a nail bin; the nail anvil is connected with a bracket; a nail molding slot is arranged at the side of the nail anvil; a suture nail is filled in the nail bin; the back of the nail bin is provided with a nail pushing plate, and the inner side is provided with a cutting knife. The binding head is characterized in that only one suture nail is arranged in the nail bin; a nail crown of the suture nail is provided with a plurality of nail legs; and the position of the nail molding slot on the nail anvil is corresponding to the position of the nail legs. The structure not only shortens the assembling process of instruments but also ensures that the nail is combined with the tissue more firmly after suture, and the phenomena of nail falling, tissue tear and the like do not occur.

The invention discloses a composite nano-silver antiviral agent as well as a preparation method and application thereof, and belongs to the technical field of health protection. The problems that in the prior art that a nano-silver antiviral agent is low in stability and timeliness; and existing cloth is poor in antiviral property are solved. The composite nano-silver antiviral agent is prepared from the following raw materials: an ester-based quaternary ammonium salt cationic surfactant, dodecyl trimethyl ammonium chloride, nano-silver sol, polyethylene glycol and water. The preparation method of the composite nano-silver antiviral agent comprises the following steps: weighing the raw materials for preparing the composite nano-silver antiviral agent according to the mass ratio; equally dividing water into two parts; preparing a first mother solution; preparing a second mother solution; and mixing and stirring the first mother liquor and the second mother liquor to obtain the compositenano-silver antiviral agent. The composite nano-silver antiviral agent has long-acting and stable bactericidal and antiviral effects, can improve the antiviral property of non-woven fabrics when applied to the non-woven fabrics, and is harmless to human bodies, safe and reliable.

The invention relates to the field of metro shield construction, in particular to a self-locking precast lining segment waterproof connector structure and a working method thereof. The self-locking precast lining segment waterproof connector structure comprises a precast lining segment waterproof connector structure body and a self-locking bolt matched with the connector structure body. Protrudingheads are arranged at the positions, located on the left side and the rear side of a lining segment, of the precast lining segment waterproof connector structure body. Sunken openings matched with the protruding heads are formed in the positions, located on the front side and the right side of the lining segment, of the precast lining segment waterproof connector structure body. The protruding heads and the sunken openings are spliced in an inserted mode. Waterproof elastic sealing cushions with inverted-tooth structures at the ends are arranged in the sunken openings of the precast lining segment waterproof connector structure body. The upper side and the lower side of each protruding head are provided with inverted-hook structures. Inverted hooks on the upper side and the lower side ofeach inserted protruding head can be engaged with inverted teeth of each waterproof elastic sealing cushion, so that the structure has the self-locking characteristic. The self-locking bolt is provided with screws of a self-locking device, nut loosening can be effectively prevented, and the self-locking function is achieved. In the long-time using process, the protruding heads and the waterproof elastic sealing cushions in the sunken openings keep a tight extruding state, so that stability and durability of long-term waterproof are ensured.

The invention provides a resin ceramic wear-resistant composite material and a preparation method thereof. The method comprises the steps: firstly, respectively preparing a polyurethane prepolymer, an epoxy resin component and a curing agent component; then premixing silicon carbide and brown fused alumina filler, and then mixing with a polyurethane prepolymer, an epoxy resin component, a curing agent component, a silane coupling agent, a dispersing agent and a defoaming agent to obtain a castable of the composite material; and finally, injecting the castable into a mold, curing and molding, and demolding to obtain the resin ceramic wear-resistant composite material. The mass fraction of the composite material ceramic filler prepared by the method can reach 87%, the composite material is firmly combined with an embedded part, cracks caused by stress are avoided, the composite material is particularly suitable for manufacturing flow passage components of large transmission equipment, and the prepared wear-resistant composite material flow passage component has the service life in the same working condition environment up to 8 times or more of that of a traditional high-chromium alloy material flow passage component.

The invention discloses a preparation method of a flexible supercapacitor positive electrode material. The preparation method comprises the following steps: firstly, nickel ions and cobalt ions are co-deposited on the surface of three-dimensional graphene foam by electrochemical method to obtain supercapacitor positive electrode material, and the morphology and the properties of the material are modified with different electrochemical deposition time to improve the conductivity, the ionic conductivity and the electron mobility of the material. The prepared positive electrode material has petalshape, and its nano sheets are formed by stacking 3-5 nanometer grains which are evenly distributed and have a larger reaction interface area with the electrolyte so that more electrochemical redox reaction charges can be generated and significant improvement of the material performance can be realized. The test results of the electrochemical energy storage performance of the material show that the material has excellent electrochemical energy storage performance and cycle stability. The material also has quite good flexibility based on the graphene foam.

The invention discloses an elastic buckling device and a packaging carrier thereof. The elastic buckling device is intended for engaging and fixing a first object and a second object. The elastic buckling device includes a buckling seat, a buckling part and an elastic piece. The buckling seat has an assembly part which is intended for engaging the first object. The buckling part is arranged on the buckling seat and is intended for installing the buckling piece so as to secure the second object to the buckling seat. The elastic piece is arranged on the buckling seat and abuts against the buckling seat and the second object. According to the invention, the elastic buckling device is applied to detachable or fixed engaging and assemblies among different objects, enables the second object, the buckling piece and the buckling seat to be more secured, and has the effects of vibration reduction and loosening prevention.

The invention relates to a graphite mould used for manufacturing local reinforcement aluminum matrix composite materials. The graphite mould comprises a graphite mould body and a fastening iron frame. The graphite mould body is of a cuboid structure, two aluminum melt filling chambers of cylindrical structures are arranged inside the graphite mould body, an aluminum melt casting port is arranged between the two aluminum melt filling chambers, and the aluminum melt casting port is communicated with the aluminum melt filling chambers on the two sides through an aluminum melt channel; air holes are formed in the bottoms of the two aluminum melt filling chambers respectively, quartz sand pad bodies are arranged above the air holes, and tungsten-rhenium thermocouples are inserted in the two air holes; the graphite mould body is sleeved with the fastening iron frame, and the fastening iron frame is fastened through fastening screws. The graphite mould is simple in structure, the compound particle local reinforcement aluminum matrix composite materials manufactured by utilizing the graphite mould have the advantages of being quick in response, simple in process, good in filling performance and excellent in overall performance, matrixes and reinforced particles are combined firmly, and expensive reinforcement phases can be saved.

The invention provides high-density and high-stripping deer fiber velvet synthetic leather, and relates to the field of deer fiber velvet synthetic leather. The high-density and high-stripping deer fiber velvet synthetic leather comprises a base cloth layer, a dry polyurethane layer is arranged on the upper end face of the base cloth layer, an elastic layer is arranged on the upper end face of thedry polyurethane layer and comprises an elastic surface skin layer and an internal cavity layer, the dry polyurethane layer and the elastic layer are provided with air holes structures, the upper endof the elastic layer is coated with a nano organic fluorine-silicon film layer, a waterproof film is arranged on the upper surface of the nano organic fluorine-silicon film layer, and a hand feelingtreatment layer is arranged on the upper surface of the waterproof film. According to the high-density and high-stripping deer fiber velvet synthetic leather, through research on the deer fiber velvetbase cloth layer and the dry polyurethane layer, the synthetic leather has good air permeability, moisture penetrability, softness and elasticity and is resistant to abrasion and scratching; and through arrangement of the elastic layer, the tensile effect and the ductility of the synthetic leather are better while the softness and the elasticity of the synthetic leather are ensured, the whole high-density and high-stripping deer fiber velvet synthetic leather is very similar to real leather from the appearance hand feeling to the internal structure, all properties of the synthetic leather areimproved, and practicability is high.

The invention relates to a gauze fabric prepared from fibers with a mosquito repelling function and a preparation process thereof. The gauze fabric is formed by weaving warp yarns and weft yarns; thewarp yarns are obtained by spinning the fibers with the mosquito repelling function; the weft yarns are obtained by blending polyurethane fibers and cotton fibers; and the fibers with the mosquito repelling function are prepared by taking polyester fibers as a framework material, polyhydroxyalkanoate microspheres as a reinforcing material and a plant extract as a functional material. According tothe gauze fabric prepared from the fibers with the mosquito repelling function and the preparation process thereof provided by the invention, the fibers with the mosquito repelling function is particularly added, so that the fabric not only has a mosquito preventing or decorating effect, but also has a relatively strong mosquito repelling effect. The gauze fabric provided by the invention adopts non-toxic and pollution-free materials, and is easy to prepare and suitable for being widely used indoors; and the preparation process is simple and convenient, easy to operate and suitable for popularization and application.

The invention discloses a cleaning container buckling structure which is combined on a cover body of a cleaning container through a demountable buckling part to lead the cover body to close or open in a seat body of the cleaning container. The buckling part comprises an integrated forming main body, a locating part and an elastic buckling arm. The locating part extends along one side of the main body to form an elastic slice; and the elastic slice is provided with a flange, so as to fasten the buckling part on the cover body. The elastic buckling arm is provided with an elastic arm and the end part of the elastic buckling arm is provided with a lateral flange. The lateral flange extends into the seat body to from a buckling state. The buckling part can comprise an elastic auxiliary arm formed between the elastic arm and the main body used for improving the elastic intensity of the elastic buckling arm. By adopting the cleaning container buckling structure of the invention, the quantity of the buckling parts can be reduced, can be directly positioned on the cover body and form self-locking after buckling the seat body and increase elastic components.

The invention discloses a composite nano-silver antiviral agent as well as a preparation method and application thereof, and belongs to the technical field of health protection. The problems that in the prior art that a nano-silver antiviral agent is low in stability and timeliness; and existing cloth is poor in antiviral property are solved. The composite nano-silver antiviral agent is prepared from the following raw materials: an ester-based quaternary ammonium salt cationic surfactant, dodecyl trimethyl ammonium chloride, nano-silver sol, polyethylene glycol and water. The preparation method of the composite nano-silver antiviral agent comprises the following steps: weighing the raw materials for preparing the composite nano-silver antiviral agent according to the mass ratio; equally dividing water into two parts; preparing a first mother solution; preparing a second mother solution; and mixing and stirring the first mother liquor and the second mother liquor to obtain the compositenano-silver antiviral agent. The composite nano-silver antiviral agent has long-acting and stable bactericidal and antiviral effects, can improve the antiviral property of non-woven fabrics when applied to the non-woven fabrics, and is harmless to human bodies, safe and reliable.

The invention discloses a water-saving and energy-saving processing technology of a polyester fabric, which comprises the steps of selecting raw materials of polyester yarns - dyeing yarns - winding yarns - weaving and cutting, and selecting high-density NC polyester yarns as raw materials of the polyester fabric. By means of the technology, the beneficial effects comprises: compared with the traditional method for integrally printing and dyeing the polyester fabric, the method of printing and dyeing is more comprehensive for polyester fabric , the polyester fabric is dyed by the dye solution,the process flow of dyeing the polyester fabric is reduced, the printing and dyeing efficiency is improved, by printing and dyeing a plurality of polyester yarns respectively, the dyeing solution consumption of the mechanism is less, so that the process is more energy-saving, water-saving and cost-saving when dyeing the polyester yarns; and the dye solution used for spraying and dyeing can flow into the packing groove by improving the sleeve groove, and the packing groove guides the dye solution into the dye solution refilling bucket, so that people can conveniently collect and process the dye solution which is not attached and dyed with the polyester yarns filament, thereby ensuring the environmental protection and saving printing and dyeing cost.

The invention discloses a high-strength thermal-insulation composite board for buildings and a preparation method thereof, and belongs to the technical field of building materials. The preparation method comprises the following steps: reacting bamboo charcoal fibers with potassium permanganate in concentrated sulfuric acid, dropwise adding hydrogen peroxide to obtain modified bamboo charcoal fibers, and filling the modified bamboo charcoal fibers with nano calcium carbonate coated and modified by undecylamine and dodecylamine, adding thermotropic liquid crystal polyarylester fiber treated by nitrogen plasma into the modified bamboo charcoal fiber dispersion liquid filled with the modified nano calcium carbonate, carrying out cross-linking reaction, and drying and dehydrating to obtain the high-strength thermal-insulation composite board for the building. The high-strength thermal-insulation composite board for the building prepared by the invention has excellent thermal insulation performance and breaking strength.

The invention relates to nickel-boron-coating calcium fluoride composite powder, a preparation method and an application thereof and a self-lubricating ceramic cutter. The nickel-boron-coating calcium fluoride composite powder has a CaF2@Ni-B core-shell structure and adopts an ultrasonic assistant chemical plating method: adding the activated CaF2 powder suspension liquid into a nickel-boron chemical plating solution, and precipitating nickel and boron and covering the surface of micrometer CaF2 with nickel and boron under the ultrasonic and stirring condition; the nickel-boron chemical plating solution contains 15g / L to 20g / L of nickel sulfate, 50 to 60 mL / L of ethylenediamine, 1 to 1.5 g / L of sodium borohydride and 30 to 50 g / L of sodium hydroxide. The invention also provides a preparation method and an application of the nickel-boron-coating calcium fluoride composite powder. The nickel-boron-coating calcium fluoride composite powder is charged into a self-lubricating ceramic cutter base body, so that the fracture flexibility and bend-resisting strength of the ceramic cutter can be remarkably improved.

The invention discloses an electroplating method for improving surface corrosion resistance of a metal pipe fitting. The electroplating method comprises the following step of firstly, surface cleaning treatment, wherein the metal pipe fitting is firstly fed into a cleaning agent to be subjected to ultrasonic dispersion, the ultrasonic dispersion power is 500 w, and the ultrasonic time is 20 min. The metal pipe fitting is subjected to surface cleaning treatment firstly, impurity particles on the surface of the pipe fitting are removed, cleaning agent treatment is adopted in the cleaning process, bentonite is adopted as a main agent of the cleaning agent, the bentonite has a lamellar structure, surface activity modification is conducted on bentonite lamellas through sodium molybdate and sodium dodecyl benzene sulfonate in the grinding process, the active performance between the bentonite lamellas is improved, then in the cleaning process, the metal pipe fitting is ground through the laminar layer of the bentonite under assistance of ultrasonic dispersion, then the surface structure of the pipe fitting is refined, and uniformity of the surface of the pipe fitting is improved.

The present invention relates to an intelligent manhole cover special for an electric power tunnel. The intelligent manhole cover comprises a cylindrical base at an opening of a manhole and a cover plate mounted at the top end of the base to seal the base. Internal threads are formed in the inner wall of the top of the base, while an external thread mounting portion matching with the internal threads is disposed at the central position of the bottom of the cover plate. A sunk groove is formed in the top end face of the base, and a first pressure sensor is mounted in the sunk groove. A plurality of support lugs are annularly disposed along the periphery of the inner wall of the bottom of the base at intervals; an inner supporting plate is placed on the support lug, and a second pressure sensor is mounted between each support lug and the inner supporting plate. Environment monitoring sensors and a light sensing probe are also mounted on the inner wall of the base. The intelligent manhole cover also comprises a controller and an alarm device. Signal output ends of the various sensors, the signal output end of the light sensing probe and the control input end of the alarm device are all electrically connected to the controller. The intelligent manhole cover special for an electric power tunnel is simple in structure, convenient to implement, high in intelligent level, and good in protection effect, and is integrated with a plurality of monitoring and protection functions.

The invention relates to an automatic dismounting mechanism for a test fixture. The comprises a fixing frame, a plurality of supporting rods, a robot switch panel, a lateral pushing assembly, a plurality of ejection assemblies and a plurality of hook units, wherein the plurality of supporting rods are vertically arranged below the fixing frame; the robot switch panel is arranged above the fixing frame; the lateral pushing assembly is connected onto the fixing frame; the plurality of ejection assemblies are connected onto the lateral pushing assembly, and can abut against a conical nut in a test pipe fitting, so that the conical nut can be separated from the test pipe fitting; the plurality of hook units are connected onto the lateral pushing assembly; and the hook units are driven by the lateral pushing assembly to horizontally move and are hooked to the upper portion of the test fixture. Compared with the prior art, the automatic dismounting mechanism for the test fixture can be matched with a full-automatic dismounting process, and accordingly, large-batch, high-precision and automatic detection fixture dismounting and part discharging are realized.

The invention discloses a method for preparing a positive electrode material for a flexible supercapacitor. The steps of the preparation method are as follows: firstly, nickel ions and cobalt ions are co-deposited with dual ions on the surface of a three-dimensional graphene foam by an electrochemical method to obtain the positive electrode material for a supercapacitor, and The morphology and performance of the material are modified with different electrochemical deposition times to improve the conductivity, ion conductivity and electron mobility of the material. The prepared positive electrode material has a petal shape, and its nanosheets are composed of 3-5 nanometer crystal grains, which are evenly distributed and have a larger reaction interface area with the electrolyte, which is conducive to generating more electrochemical redox reaction charges , to achieve a significant improvement in material performance. The test results of the electrochemical energy storage performance of the material show that the material has excellent electrochemical energy storage performance and cycle stability. Based on graphene foam, the material has very good flexibility.

The present invention relates to an attachable / detachable handle coupled to a hollow socket, which is fixed on the outer surface of a kitchen container, so as to be separable from the kitchen container. According to the present invention, provided is an attachable / detachable handle having: a first space part extending from an end part facing a kitchen container and into which a socket of the kitchen container is inserted; and a second space part extending from the first space part and opened upward such that a first mounting part is formed on the upper part and a second mounting part is formed in the center, wherein a button part, which can be coupled with the socket so as to be separable therefrom, is located in the second space part. The button part includes: a button seat having a central groove and fixed on the first mounting part; a button positioned so as to penetrate the central groove of the button seat and moving in the vertical direction along the second space part; a spring; a movement member supported by the spring so as to move in the forward and backward directions towards the container direction end part, thereby moving forward by the spring and moving backward by the downward movement of the button; and a plate-shaped member fixed to the second mounting part so as to axially rotate in the vertical direction, wherein the plate-shaped member is coupled with the movement member, so as to be separable therefrom, thereby controlling the forward movement of the movement member.

The invention discloses a position saving water tank which comprises an outer water tank. A first water outlet is formed in the bottom of the outer water tank, and a first outward extending edge is arranged on an upper open of the outer water tank. The position saving water tank is characterized by comprising an inner water tank, the inner water tank is detachably inserted into the outer water tank, a second water outlet corresponding to the first water outlet is formed in the bottom of the inner water tank, and a silicone ring is fixedly connected with the periphery at the bottom of the second water outlet and extruded by the outer water tank and the inner water tank.

The invention discloses a fiber bragg grating strain sensor. According to the fiber bragg grating strain sensor, one end of a first fixed metal sleeve and one end of a second fixed metal sleeve are arranged at the two ends of an elastic sleeve respectively in a sleeving mode, a fiber bragg grating is fixed into the elastic sleeve, fixing screw holes of fixing components are fixed to the first fixed metal sleeve and the second fixed metal sleeve respectively, one end of each fixing bolt is of a conical structure, the fixing bolts are inserted into the corresponding fixing screw holes, a throughhole is formed in each fixing bolt, the end of each through hole communicates with the end of a cone head of the corresponding fixing bolt, a pushrod is inserted into the through hole of each fixingbolt, one end of each pushrod is also of a conical structure, each through hole is filled with viscous glue, and an anti-corrosion component is further arranged on each of the first fixed metal sleeve, the second fixed metal sleeve and the elastic sleeve. The fixing method of the fiber bragg grating strain sensor is easy and convenient to use, and service life is prolonged.

The invention discloses a full-isolation heat preservation building block convenient to fix and install, and belongs to the technical field of building outer walls. The full-isolation heat preservation building block convenient to fix and install comprises a connecting layer, wherein heat preservation layers are fixedly connected to the front side and the rear side of the connecting layer; surfacelayers are fixedly connected to the sides, away from the connecting layer, of the heat preservation layers; dovetail protruding blocks are fixedly connected to the sides, facing the heat preservationlayers, of the connecting layer and the surface layers; a plurality of dovetail protruding blocks are horizontally arranged at equal intervals; and dovetail grooves are formed in the two sides of theheat preservation layers and matched with the dovetail protruding blocks. According to the full-isolation heat preservation building block, the mortar combination position of an upper heat preservation building block and a lower heat preservation building block can be separated from the combination position of the heat preservation layers, and mortar smearing during heat preservation building block connection is facilitated; and in addition, the horizontally adjacent heat preservation building blocks are connected through U-shaped bolts, the structural strength of the connection position between the heat preservation building blocks is greatly improved, the technical difficulty of wall construction is reduced, and therefore the heat preservation effect of a wall is effectively improved.

The invention belongs to the technical field of air purification, and particularly relates to a nano-silver active filter element, including a filter element body, which includes a sheet-shaped filter paper composed of a multi-layer composite structure, and the sheet-shaped filter paper is sequentially arranged from the air inlet surface to the air outlet surface. It includes a nano-silver antibacterial layer, a filter layer and a protective layer. The nano-silver antibacterial layer is prepared from phenolic composite fibers loaded with nano-silver ions, so that the nano-silver ions can be more firmly combined with the phenolic composite fibers. The invention also relates to the preparation method of the nano-silver active filter element, which uses the structural diversity of phenolic compounds to change the nano-silver ions into different shapes, so that the nano-silver ions are more tightly combined with the phenolic composite fibers, and are not easy to fall off and strengthened. Antibacterial performance is guaranteed, and it can be washed and used to achieve long-lasting antibacterial and strong antibacterial performance.