534results about How to "Anti-static" patented technology

The invention provides composite material containing a modified basalt and a polymer and a preparation method thereof, wherein the main components of the composite material contains: 1200-1300 parts of polymer, 700-800 parts of modified basalt fiber, and 5-50 parts of surfactant coupling agent. The method, by means of the mechanical force, supersonic wave and electromagnetic force synthetic effect of the surfactant or coupling agent, comprises: uniformly dispersing the polymer and the modified basalt fiber into a solvent to prepare a uniform and stabile mixture, adding another solvent into the mixture, implementing the cladding or wrapping to the modified basalt fiber while precipitating the polymer from the mixture, and then forming the composite material of the modified basalt fiber containing polymer. The composite material can be used for preparing asphalt with excellent performances, the method has the advantages of low cost, simple operation and easy enlargement, and the method makes it easy for the modified basalt fiber to be uniformly dispersed in the polymer.

The invention relates to a shock-resistant and damp-proof power battery set which comprises an outer shell (1), a plurality of cells (2) arranged inside the outer shell (1) and a charging / discharging protection circuit board (3) in electric connection with the plurality of cells (2), wherein a support structure (5) constraining the positions of the plurality of cells (2) axially and radically is fixed in the outer shell (1), the plurality of cells (2) constrained in the support structure (5) are arranged with a clearance in between. The cells in the battery set can be positioned reliably to keep a sound electric contact, has very good shock-resistant performance and heat dispersion performance and is very suitable to be used on various power battery sets in shaking circumstances.

The invention relates to a bamboo charcoal face pack, which is prepared by water and functional beauty substance. The functional beauty substance comprises nanometre-modified bamboo charcoal powder, metal chelate, and effective raw material, and the weight ratio of each component part is that water 50% to 80%, metal chelate 1% to 5%, nanometre-modified bamboo charcoal powder 10% to 20%, and effective raw material 10% to 30%. The mask has the effects of whitening, moisturizing, desalinating macule, resisting crease, resisting allergy, controlling oil, and removing acne. The face mask of the invention can be used to clean pores which are plugged. The invention can lead skin to be easier to get beauty results, which has a natural heath function.

The invention relates to a non-woven fabric, and a preparation method and application thereof. The preparation method comprises the following steps of using oxidized graphene as ultraviolet absorption packing; uniformly mixing the oxidized graphene and zinc oxide nano coating in water; coating two sides of a non-woven fabric by using the mixture; and drying and molding to obtain the non-woven fabric. Average transmittance of the non-woven fabric in a long-wave ultraviolet region is lower than 3%; the decrease amplitude of the transmittance of the non-woven fabric in a visible light region is smaller than the decrease amplitude of the transmittance of a pure non-woven fabric in the visible light region by 30%-50%; the non-woven fabric is good in anti-ultraviolet property, and is washable; properties of the non-woven fabric can still be maintained even if the non-woven fabric is violently stirred in water for 30 days; and moreover, the non-woven fabric has characteristics of good conductivity, anti-static property, light color and environmental protection, and can be used in fields of ultraviolet protective clothing, anti-ultraviolet screen windows, anti-ultraviolet tarpaulin and anti-static clothes.

The invention discloses a rubber reinforced cement functional composite material and a preparation method thereof. The rubber reinforced cement functional composite material is prepared from waste rubber and cement or cement mortars by the following steps of: applying coupling adhesives to surfaces of waste rubber grains and / or powder by using coupling agents; mixing the waste rubber grains and / or powder with the cement or the cement mortars; adding water into the rubber-cement mixed materials for uniform stirring, and performing pavement, pressing, demoulding and maintaining to obtain the functional composite material product having a high mechanical strength and endurance. The composite material has the characteristics of noise reduction, sound isolation, high impact resistance, damping vibration attenuation, wear resistance, static resistance, water resistance and the like, has the advantages of insulation, environmental protection and the like and can be used in the field of functional materials, such as buildings, roads, railways, tunnels, noise barriers and the like. The functional composite material and the method thereof also provide a new way for solving the global problem of 'black pollution' of increasing waste tyres and have a wide application prospect.

The invention relates to a multifunctional bamboo vinegar laundry liquid which comprises the following components in parts by weight: 18-22 parts of surfactant, 3-5 parts of bamboo vinegar, 1-4 parts of acidic assistant, 0.1-0.5 part of caustic soda flakes, 0.3-0.5 part of fungicide, 0.3-0.5 part of chelator, 0.1-0.5 part of fluorescent brightener, 0.1-0.5 part of preservative, 1-1.5 parts of thickeners and 0.5-1 part of anti-redeposition agent. The product provided by the invention has multiple functions of decontaminating, softening, static preventing, bacterial resisting, deodorizing, color conserving, dust removing, clothes care and the like, is easy to rinse (water-saving) and is multifunctional bamboo vinegar laundry liquid.

The invention provides a multifunctional water-based ink, which comprises the following components by weight percent: 25 to 35 percent of water-soluble acrylic resin, 10 to 20 percent of paint, 3 to 10 percent of silicon oxide, 15 to 25 percent of water, 5 to 15 percent of complex solubilizer, 5 to 10 percent of neutralizing agent, 1 to 3 percent of emulsifier, 0.2 to 1 percent of antifoaming agent, 5 to 9 percent of dispersant, 0.2 to 1 percent of antistatic agent, and 0.1 to 1 percent of anti mildew agent. The multifunctional water-based ink is a novel printing water-based ink which is nontoxic, odorless and low in comprehensive price, and has watertight, anti-mildew and antistatic functions and other functions.

The invention provides an antistatic blended yarn, which is prepared from 20 to 45 percent of polyester fiber, 35 to 70 percent of cotton fiber and 10 to 30 percent of stainless steel fiber by weight percentage through blended spinning. The invention also provides an antistatic sweater produced by adopting the antistatic blended yarn and a method for producing the same. The product of the antistatic blended yarn has antistatic and electromagnetic shielding functions, does not have special requirement on washing, is not influenced by the environment, has complete colors and solid texture, is sweat-resistant and corrosion-resistant, can be applied to special industries such as anti-microwave clothes and radiation-resistant clothes, can effectively prevent human body from being radiated by computers and the like, and particularly protect pregnant women. The antistatic blended yarn can be processed into clothes worn in spring, autumn and winter and the clothes are comfortable to wear with excellent performance.

The invention reveals a composite self-cleaning nanometer coating, an inorganic transparent coating layer and a self-cleaning product. The coating, the coating layer and the product have anti-static,super-hydrophilic and photocatalytic functions at a same time. The composite self-cleaning nanometer coating containing 0.01-20 parts of conductive particles, 0.01-20 parts of a photocatalyst, 0.01-20parts of a hard film agent, 0.01-20 parts of an inorganic binder and 20-99.96 parts of a hydrophilic solvent is prepared. The surface of an object is coated with the composite self-cleaning nanometercoating, and the composite self-cleaning nanometer coating is solidified for forming a hydrophilic inorganic transparent coating layer. Because of specific functions of static electricity conductionand static electricity dissipation of the coating layer, static electricity generated when the surface of the object rubs flowing air can be instantly eliminated, and the surface of the object loses the attraction to particles in the surrounding environment in microstructure, so that sand, dust, pollen, haze and the like are difficult to attach to the surface of the object, and thus an instant self-cleaning effect of keeping the surface of the object clean at any time is achieved. The coating layer also has a photocatalyst degradation function and can be used for remarkably solving the problemof high-adhesive-force dirt caused by non-electrostatic adsorption of bird droppings, ink, artificial scrawling and the like.

The invention discloses a method for producing a novel degradable material by manioc dreg and pot ale and comprises the following steps: the manioc dreg or the pot ale is purified, ground, cleaned, drained and mixed with dry paper pulp according to the weight proportion of a to b; wherein, the a lies between 2 and 5, and the b lies between 5 and 8; a papermaking addition agent is added, and the mixture is molded and parched, thus obtaining the degradable material product. Paper pulps of vegetable fiber such as waste newspapers, carton paper, paperboards and other paper pulps of vegetable fiber materials can be taken as the dry paper pulp. The method for producing the novel degradable material by the manioc dreg and the pot ale adequately utilizes wastes of manioc resources such as the manioc dreg, the pot ale to produce the novel industrial degradable material with good quality and low cost, replaces degradable materials of cellular plastics, and not only solves the difficult processing problem of wastes and changes wastes into valuable, but also effectively generates the actions of controlling and eliminating the white pollution; furthermore, the method for producing the novel degradable material by the manioc waste and the pot ale has uncomplicated technique, short production period, low cost, low energy consumption, simple and convenient operation, high product stability and good economic, social and environment-protective benefits.

The invention discloses a fluorescent inflaming-retarding multifunctional double-layer fabric. The surface layer of the fabric is woven from inflaming-retarding yarn capable of being dyed with fluorescence color, and the inner layer of the fabric is woven from non-melting inflaming-retarding yarn incapable of being dyed with fluorescence color. The warps of the inner layer are lifted to be interwoven with the wefts of the surface layer to form a binding texture so that the two layers can be connected. The fabric is prepared in the way that the warps of the inner layer are lifted to be interwoven with the wefts of the surface layer to form the binding texture so that the two layers can be connected, and then dyeing treatment is conducted to generate the fluorescent inflaming-retarding multifunctional double-layer fabric. Specifically, the two layers of the fabric are connected in the way that when surface wefts are put in for surface layer weaving, all inner warps must sink to the space below a shed and can not be interwoven with surface wefts; when inner wefts are put in for inner layer weaving, all surface warps must be lifted and can not be interwoven with inner wefts. The double-layer fabric can have different spaces and can be used for making protection garments in a plurality of fields.

The invention discloses a textile. A plain-weave or diagonal-weave organization unit is interwoven by warps and wefts, the warps are made of colored cotton, the wefts are made of natural colored hemp, the warps and the wefts of the plain-weave or diagonal-weave organization unit are arranged vertically in a layered manner, and the ratio of the warps to the wefts is 5:3. The production process of the textile includes weaving process and finishing process. The warps and the wefts of the textile are properly matched vertically in the layered manner, and mutually make good for deficiency so as to realize perfect combination of appearance and hand feeling. In addition, the textile has functions of temperature regulation, allergy prevention, static elasticity prevention and antibiosis. The production process includes the pure physical finishing process, chemical preparation is omitted, pollution is reduced, and the production process is environment-friendly.

The invention provides a protective composite material, which comprises a protective layer, a functional layer and a comfort layer stacked in order; from the end of the protective layer, the functional layer includes a nuclear radiation shielding layer, an electromagnetic shielding functional layer and a textile substrate which are sequentially stacked, or, the functional layer includes the nuclear radiation shielding layer and the textile substrate which are sequentially stacked; and from a fabric substrate end, the comfort layer includes a neutron protective coating and a polypropylene high-molecular substrate which are sequentially stacked. The invention also provides a preparation method of the protective composite material. The protective composite material has multiple functions of flame retardation, static prevention, anti-ionization / electromagnetic radiation and neutron protection, and can be used for processing nuclear radiation protective clothing and protective tents, flexible protective screens and the like.

The invention provides a four-wheel type indoor mobile robot, and relates to a robot. The four-wheel type indoor mobile robot comprises a chassis, two driving wheels, two universal wheels, a controller and a lithium battery. The two driving wheels are two independent driving wheels adopting a wheel hub type DC brushless motor with a Hall effect sensor to act as a driving motor. The driving wheels and the driving motors are integrated. The controller adopts a full-bridge PWMDC / DC converter working in a bipolar mode to drive the DC brushless motors so that disadvantages in the prior art that DC brush motors are slow in commutation speed and high in noise, and the motors are liable to be damaged when the motors are in a wear and tear state for a long time can be overcome.

The invention relates to the field of multifunctional materials, in particular to a high-temperature-resisting heat-insulating waterproof antistatic multifunctional fabric. The multifunctional fabric comprises a heat-resisting waterproof layer (1), a heat-resisting heat-insulating layer (2) and a flame-retardant comfortable layer (3) in sequence from top to bottom, wherein the heat-resisting waterproof layer (1) comprises a high-temperature-resisting antistatic fabric (11) which is subjected to waterproof treatment, and a waterproof film (12) which is pasted to a lower surface of the high-temperature-resisting antistatic fabric (11); the heat-resisting heat-insulating layer (2) is a multilayer spunlace nonwoven fabric which is made of a high-temperature-resisting fiber; and the flame-retardant comfortable layer (3) is a flame-retardant plain weave fabric. The multifunctional fabric has a high temperature resisting function, a heat insulating function, a waterproof function, an antistatic function and the like at the same time, can be made into protective articles such as protective garments and protective gloves which have the high temperature resisting function, the heat insulating function, the waterproof function and the antistatic function and are used for whole body protection or local protection during operation under dangerous conditions, and is extremely high in practicability.

The invention discloses a fiber reinforced magnesium oxychloride red mud plate and a preparation method, and belongs to the utilization technology of waste material-red mud produced in alumina industry. The plate mainly comprises a solid blending material and brine, wherein the weight ratio of the brine is 15-30%, and the solid blending material comprises the following components by weight ratio: 30-70% of red mud, MgO of 25-60 % and 5-10% of reinforcing fiber; and 0.5-5% of modifier is added into the brine. The wet red mud, the magnesium oxide, the reinforcing fiber and the brine added with the modifier are subjected to extrusion molding by roller pressure after being uniformly mixed, naturally harden after solidification, and form a standard material or profile after shear processing. The plate is of a high-strength solidification plate with high content of red mud, has the advantages of fireproof, waterproof and anti-static performances, heat and noise insulation, strong pressure resistance, good fracture resistance, good corrosion resistance and the like, is widely used in construction, decoration and other industries, and can digest a lot of red mud to truly turn waste into wealth.

The invention discloses an anti-static, anti-corrosion, waterproof and stretching-resistant insulated cable. The anti-static, anti-corrosion, waterproof and stretching-resistant insulated cable comprises a cable body. The cable body comprises cable cores, a cable core protective layer, an insulating layer, a shielding layer and an outer jacket. The cross section of the cable core protective layer is of a circular structure, and the multiple evenly-arranged cable cores are arranged in the cable core protective layer and separated through PVC plastic connecting rods; a plurality of current guide cores are arranged outside the cable core protective layer and are tangent with the cable core protective layer; the insulating layer is arranged outside the cable core protective layer; waterproof fillers are arranged in a gap between the insulating layer and the cable core protective layer; the shielding layer is tightly extruded on the insulating layer and internally provided with the multiple evenly-arranged current guide cores; a breakdown resistant layer, a steel core protective layer and a waterproof layer are sequentially extruded on the shielding layer from inside to outside; an armor layer is extruded outside the waterproof layer, the outer jacket is arranged outside the armor layer, and a graphite layer is arranged between the armor layer and the outer jacket. The anti-static, anti-corrosion, waterproof and stretching-resistant insulated cable has the advantages of being reasonable in structural design, high in anti-static capacity, good in anti-corrosion performance and the like.

The invention relates to a formulation of a sole, in particular to formulation of a military sole, comprising the formulations for forming an outer bottom and a middle layer of the sole, wherein the formulation of the outer bottom based on the parts by weight comprises: 47-51 parts of nature rubber, 49-53 parts of chloroprene rubber, 0.7-0.9 part of vulcanizing agent S-80, 2.4-2.6 parts of accelerating agent, 1.9-2.1 parts of magnesium oxide, 4.5-5.5 parts of zinc oxide, 4.5-5.5 parts of antimony oxide, 1.9-2.1 parts of stearic acid, 1.9-2.1 parts of zinc stearate, 20-24 parts of high wear resistance carbon black, 2-4 parts of engine oil 46#, 6-8 parts of dibutyl ester, 1.4-1.6 parts of anti-aging agent, 0.8-1.2 parts of paraffin wax and the like; and the formulation of the middle layer based on the parts by weight comprises: 47-51 parts of nature rubber, 49-53 parts of chloroprene rubber, 0.9-1.1 parts of sulphur, 2.5-2.7 parts of accelerating agent, 4.5-5.5 parts of zinc oxide, 1.9-2.1 parts of magnesium oxide, 3.8-4 parts of antimony oxide, 6.3-6.7 parts of decabromodiphenyl oxide, 1.9-2.1 parts of stearic acid and the like. The sole prepared by the formulation has good wear resistance and folding resistance, and has the performances of oil resistance, acid-base resistance, inflaming retarding, static electricity prevention and the like, thus meeting the military requirements.

The invention discloses a surgical gown fabric and a production technology thereof, and particularly provides the surgical gown fabric with reusable, antibacterial, anti-spatter and anti-static properties and other properties and the production technology thereof. The surgical gown fabric is characterized in that the fabric comprises a surface layer fabric, a middle layer bacterium-proof film and an inner layer fabric; the surface layer, the middle layer and the inner layer is bonded through a bonding technology to form a composite fabric; the surface fabric is a material woven from special-shaped cross-section modified hydrophilic polyester filaments and chilon based carbon black conductive covered yarn; the middle layer bacterium-proof film is a PTFE microporous film; the inner layer fabric is a material woven from special-shaped cross-section modified hydrophilic polyester filaments. The provided medical surgical gown fabric is simple in preparing method, the product has reusable, antibacterial, anti-spatter and anti-static properties and other properties, and the surgical gown fabric has good wearing comfort of being hygroscopic, fast to dry and the like.

The invention provides a substrate-free pressure-sensitive acrylic thermal conductive adhesive. A thermal conductive agent is dispersed in a monomer solution, and the thermal conductive adhesive is formed by curing and cross-linking after in situ polymerization; the consumption ratio of the thermal conductive agent to the monomer is (1-4): (6-9); the thermal conductive agent consists of 75 to 90 percent of carbon fibers and 10 to 25 percent of carbon nano tubes; and the monomer is acrylic acid and / or acrylate. Because the thermal conductive agent of specific components is uniformly dispersed in the acrylic polymerization monomer to form a stable three-dimensional netlike thermal conductive structure, so that the thermal conductive adhesive is good in thermal conductive performance and good in environment friendliness. The thermal conductive adhesive can be applied between a light emitting diode (LED) light bar and an aluminum alloy profile, between the aluminum alloy profile and a back plate, between the LED light bar and the back plate or between a chip and a radiator, is used as a double-sided adhesive tape, and is used under the condition of a big gap between two contact faces of liquid crystal modules.

The invention provides an environmentally-friendly three-dimension sealing and packing material which is developed by using the characteristics of different film products, has different functions, can be formed quickly on use sites and has recycling value. The three-dimension packing material is combined with a plurality of layers of functional resin films without any extra supporting device. The films are sealed by heat and folded to form a space capable of storing gas media including the air for a long time, and the air and the films jointly form the functional three-dimension packing material by using a self-adhesive film preventing and air blocking technology. The three-dimension packing material is completely flat before use, is quickly formed in three dimensions by using a gas such as the air when to be used by a user and forms an air bag protective structure around an product to be protected. The three-dimension packing material has excellent comprehensive protective functions such as extrusion resistance, shock resistance, falling resistance and impact resistance and functions such as light shielding, moisture prevention, electrostatic prevention, conductivity, wear resistance, corrosion resistance, rust resistance, and printability.

The invention relates to a new method to make vehicle cleaning liquid that has the effect of decontamination waxing, static electricity proof, anti ultraviolet ray, and bacteriostasis. It is made up of nanometer material, good quality surface activator, polishing agent, bacteriostatic agent, and stabilizer. The invention is benefit for environment protection.

The invention discloses a process for combining flax enzyme and chemical degumming with bleaching. The process comprises the steps of flax filling and preliminary acid water washing; enzyme degumming; bleaching pre-treatment; water washing; oxidation bleaching; water washing; neutralization and water washing; dehydration; softening treatment; dehydration; and loosing for drying. The process improves the hydrophilicity and lubricity of fibers, enhances the whiteness and softness of fibers and greatly reduces the content of lignin in fibers, thereby enhancing the spinnability of fibers. The fibers treated by the process have the advantages of strong tension, softness, good fineness, weak electrical conductivity, rapid water absorption and diffusion, high expansivity and the like, and have the functions of temperature control, antianaphylaxis, antistativity and antibacterium, and the fibers can be spun into high and low yarns or blended with other fibers to make high-class cloth. The profit rate is about 50%, thereby creating good economic benefit..

The invention discloses a charging pile image acquisition system and a method of recognizing vehicle identity information by image acquisition; the charging pile image acquisition system comprises a charging pile and a vehicle identity auto-recognition system embedded in the charging pile; the vehicle identity auto-recognition system is connected to an information interface of the charging pile through a vehicle identity auto-recognition system communication interface; the vehicle identity auto-recognition system comprises an auto-recognition module and a camera, the signal output end of the camera is connected with the auto-recognition module, and the input end of a charging control module in the charging pile is connected to a cloud server. Recognizing is achieved herein by combining vehicle identity auto-recognition technology and the charging pile, the camera is mounted on a body of the charging pile at specific height, and the auto-recognition system is added in the body. The camera side of the charging pile faces a parking space during mounting of the charging pile. The camera used herein is small in size and is friendly to the integral structure of the charging pile; the charging pile image acquisition system has the advantages of good waterproofing property, lightning protection, good dustproof property, good antistatic property and the like.

The present invention is composite down feather wadding producing process. The down feather wadding consists of one bulking down feather wadding of mixture, adhesive and environment friendly permeating film. The bulking down feather wadding is made of mixture comprising down feather fiber, 3D crisp hollow polyester staple fiber, low smelting point fiber and textile fiber; the adhesive is made of polymer resin of acryl monomer; and the environment friendly permeating film is made of polyester and carbamate. Polyester, carbamate and the adhesive are mixed, heated to 23-27 deg.c, and pressurized to combine with bulking down feather wadding. The present invention has the features of no bubbling, less generation of static electricity, no down leakage, etc.

The invention relates to water solubility biodegradable material. The material contains the outcome formed by mixture fusing which contains starch, polyhydric alcohol, and aqueous polyvinyl alcohol which has hydrophilicity. Using the mixture total weight as the criterion, the content of the polyhydric alcohol is between 10wt% and 19wt%. Its fusing temperature is 140-190 degree centigrade; decomposition temperature is 250-400 degree centigrade. Thus it can be used to make sheet material series forming product which has better simply supported beam impact strength, yield strength in tension, water solubility and biodegradability.

The invention relates to a nanometer carbon tube / epoxy resin complex material and its producing technique. The technique procedures are that: add nanometer carbon tube by 0.01 to 10.0 wt percents into the raw material of nanometer carbon tube, phenolic aldehyde epoxy resin and #593 solidificating medium. The nanometer carbon tube is produced by CVD method with a diameter of 10 to 50 nanometer and length of 1 to 500 mu-meter and purity of 85 to 95 percents. The epoxy resin is phenolic aldehyde epoxy resin with molecular weight of 900 to 1100. The produced complex material is block material. The invention uniformly scatters the carbon nanometer tube into the epoxy resin basal so to enhance the flexibility of the epoxy resin basal material. In this way a complex material with remarkable dynamics property and inter-obtains static electricity proof, electricity conductive, electromagnetic shielding and microwave absorbing functions which the material producing technics is simple, inexpensive and easily acquirable.

The invention discloses a laser cutting machine used for machining an automobile interior trim part. The cutting machine comprises a machine base, a supporting frame, an upper moving device, a cutting robot, a laser cutting enclosure device, a fixing device, a camera device and an electric control device; the supporting frame is mounted on the machine base, the upper moving device is supported above the machine base through the supporting frame, the upper moving device comprises a gear and rack transmission system driven by a stepping motor, the upper end of the cutting robot is connected with the lower end of the upper moving device, the fixing device is arranged on the machine base and close to the laser cutting enclosure device, the camera device is arranged on a cutting machine inlet and located on the upper portion of the supporting frame, and the electric control device is arranged outside the supporting frame; the laser cutting machine used for machining the automobile interior trim part can increase the cutting range, the laser cutting enclosure device and the cutting clamp fixing device are arranged, the influence on the surroundings is reduced, the fixing time of a cutting clamp is shortened, and the production efficiency is improved.

This invention relates to a method for preparing water-soluble Au / Ag ink, which comprises: Au / Ag powder 20-30 wt.%, acrylic acid emulsion 55-65 wt.%, 15% polyvinyl alcohol 4-6 wt.%, gaseous SiO2 1-3 wt.%, dispersant 2-4 wt.%, wetting agent 0.3-1.0 wt.%, film-forming agent 3-5 wt.% and antifoam 0.2-0.4 wt.%. The water-soluble Au / Ag ink has such advantages as high water leakage resistance, high adhesiveness, high corrosion resistance, high electrostatic resistance, good anti-aging capacity, no color change, no fading, simple application process, no toxicity to operators, no environmental pollution, no flammability and no explosion. The water-soluble Au / Ag ink can be used to paint packages of cigarette and food as a substitute for Al / Pt composite paper.

The invention discloses a preparation method of a freshness-retaining packaging film with an antibacterial and antioxidant function. The preparation method comprises the followings steps: (1) dissolving 5-10 parts by mass of zein into 70-90 parts by mass of 80% alcohol and stirring for sufficiently dissolving so as to obtain a zein liquid; (2) adding a small amount of water into 5-25 parts by mass of active calcium to obtain an active calcium hydrate; (3) mixing the zein liquid with the active calcium hydrate to obtain a mixed liquid, adding 1-2 parts by mass of a plasticizer and 0.2-2 parts by mass of plant essential oil into the mixed liquid to obtain a film liquid; (4) ultrasonically homogenizing and refining; (5) degassing; (6) performing tape casting; and (7) drying and uncovering the film. The freshness-retaining packaging film prepared by the preparation method has excellent antibacterial property and antioxidant property, strong mechanical performance and high barrier property, and is easily available in raw materials, simple and easy in processing process, low in cost, free of toxicity and good in safety.