38 results about "Polyvinyl fluoride" patented technology

The invention relates to the technical field of radiation refrigeration films, and discloses a porous polyvinylidene fluoride based composite radiation refrigeration film and a preparation method thereof. The method comprises the following steps: firstly, carrying out melt blending on PVDF, NaCl and ZnO nanoparticles and forming a film, then dissolving out NaCl through water washing, and constructing a continuous three-dimensional porous structure in a PVDF matrix; and immersing the obtained porous PVDF / ZnO membrane material into a methanol aqueous solution containing 2-methylimidazole, so that ZnO is subjected to a coordination reaction at the pore wall and is converted into the ZIF-8 nanocrystal in situ. In the thin film prepared by the steps, the micron-sized salt-induced pore structure, the nano-sized ZIF-8 particles and the interface of the ZIF-8 particles jointly form a multi-stage scattering network, so that the scattering ability of the thin film in the solar spectrum range of 0.25-2.5 microns can be remarkably enhanced, the high infrared emission performance of the PVDF matrix in an atmospheric window of 8-13 microns is maintained, and the thin film has high solar reflectivity and high infrared emissivity, and can be used for preparing the solar film. An excellent radiation refrigeration effect can be achieved, and the heat-dissipating material is suitable for being applied to building outer surfaces, equipment heat dissipation, individual heat management and the like.

The present application relates to a kind of hyperbranched polyvinyl fluoride resin prepared by suspension polymerization with chain transfer agent and its preparation and application, the preparation method of the resin includes: under the condition of using at least one initiator, at least one chain transfer agent, at least one dispersing agent, make polyvinyl fluoride occur polymerization reaction;The chain transfer agent is at least one chain transfer agent of multiple chain transfer sites (≥2) or the combination of liquid phase transfer agent and gas phase transfer agent forms multiple chain transfer sites.Compared with prior art, the polyvinyl fluoride resin of the present application has hyperbranched configuration, and high mechanical strength and good processing performance are considered, the resin is especially suitable for being used as the inner lining material of marine non-adhesive flexible riser, submarine cable packaging layer and other fields, its excellent chemical corrosion resistance, gas permeation resistance and heat aging performance can effectively block the erosion of external corrosive medium to internal tensile armor layer.

The invention discloses a recovery method of a lithium iron phosphate positive electrode material and the lithium iron phosphate positive electrode material, and belongs to the technical field of lithium batteries, the lithium iron phosphate positive electrode material comprises a positive electrode active material, a conductive agent and a binder, the binder is obtained by carrying out free radical graft polymerization reaction on polyvinyl alcohol and unsaturated carboxylic acid and then blending with furfuryl alcohol resin and an aldehyde group cross-linking agent, and the binder is cross-linked in the drying process of the lithium iron phosphate positive electrode material. Grinding the positive active matter, a conductive agent, a binder and water to obtain positive slurry; and carrying out coating, vacuum drying, tabletting, slicing and vacuum drying to obtain the lithium iron phosphate positive electrode material. The binder can improve the performance of a lithium iron phosphate positive electrode material, the solubility of the binder is better than that of polyvinylidene fluoride, an alcohol solvent can permeate into a cross-linked network to destroy a cross-linked part and dissolve the binder, solvents such as strong acid and strong alkali are not needed, the binder is more environment-friendly, and recycled residues do not contain fluorine and aluminum, so that the binder is more environment-friendly. And recycling treatment of the waste batteries is facilitated.

The application discloses a ferroelectric local field enhanced polarized photoelectric detector and a preparation method thereof, and relates to the technical field of polarized photoelectric detection. The polarized photoelectric detector is observed from bottom to top and sequentially comprises a substrate, a two-dimensional semiconductor layer, a metal electrode pair and a ferroelectric film layer. The material of the two-dimensional semiconductor layer is black phosphorus. The material of the ferroelectric film layer is polyvinyl fluoride-based ferroelectric polymer. The metal electrode pair comprises a first metal electrode and a second metal electrode. A channel structure formed between the first metal electrode and the second metal electrode exposes part of the two-dimensional semiconductor layer. An in-plane PN junction is formed by part of the two-dimensional semiconductor layer exposed after the ferroelectric film layer is electrode polarized. The strong local field of the ferroelectric film changes the Seebeck coefficient and the conductivity of the black phosphorus in the armchair direction and the zigzag direction, enhances the photocurrent in the armchair direction, and greatly improves the polarization detection ratio of the polarized photoelectric detector.

The utility model provides a self-repairing radome body structure, which comprises a first skin layer, a first self-repairing layer, a second skin layer, a foam sandwich layer, a third skin layer, a second self-repairing layer, a fourth skin layer and a polyvinyl fluoride film which are sequentially arranged from top to bottom, a curing agent is smeared between the first skin layer and the first self-repairing layer, a curing agent is smeared between the second skin layer and the first self-repairing layer, a curing agent is smeared between the third skin layer and the fourth skin layer and the second self-repairing layer, and the first self-repairing layer and the second self-repairing layer are filled with epoxy resin matched with the curing agents. When the antenna cover body structure is damaged in the environment, the first self-repairing layer and the second self-repairing layer are driven to release epoxy resin due to pressure difference or material damage, so that the epoxy resin is in contact with the curing agent of each skin layer, the epoxy resin and the curing agent are subjected to cross-linking reaction and cured at room temperature, and the damage is repaired in time; and the antenna is ensured to always work in a good environment, so that stable signal transmission quality is maintained.

The utility model relates to a light photovoltaic module, which relates to the photovoltaic field and comprises a transparent top layer, a bonding layer, a glass fiber buffer layer, a bonding layer, a battery layer, a bonding layer and a reinforcing backboard layer which are sequentially arranged. The transparent top layer comprises a polycarbonate layer, a polymethyl methacrylate layer, a fluorinated ethylene propylene copolymer layer or a polyethylene terephthalate layer; the bonding layer comprises an ethylene-vinyl acetate copolymer layer or a polyolefin elastomer layer. And the reinforced back plate layer comprises a polyvinyl fluoride, polyester film and polyvinyl formal back plate layer, a fiber reinforced polyamide back plate layer or a carbon fiber reinforced composite material back plate layer. According to the light photovoltaic assembly provided by the utility model, the light photovoltaic assembly is obtained by simplifying the design of the photovoltaic assembly of the existing sunlight shed and adopting the light high-strength material on the basis of ensuring the strength, so that the breakage rate and the safety coefficient of the product are greatly reduced, and the construction difficulty of the sunlight room is favorably reduced.

The invention belongs to the technical field of compositions of high-molecular compounds, and relates to a high-barrier antibacterial rubber-plastic composite material and a preparation method thereof. The material is composed of 45%-65% of polyvinyl fluoride, 20%-35% of a bio-based polyester elastomer, 1.5%-4.0% of silver-loaded zirconium phosphate, 0.8%-2.5% of a bismaleimide compatibilizer and the balance of a processing aid. Wherein the side chain of the elastomer contains carboxyl or epoxy group, the elastomer and the polyvinyl fluoride form a covalent bond interface through in-situ reaction, and the antibacterial agent is anchored on the interface through silane coupling treatment. The preparation method comprises the steps of pretreatment, primary mixing, reactive extrusion and granulation molding. According to the invention, a bio-based polyester elastomer with reaction activity is introduced through molecular design, and a rubber-plastic composite material system with high barrier property, high toughness, long-acting antibacterial property and good processability is successfully constructed in combination with reactive compatibilization and interface directional anchoring antibacterial strategies; and a reliable material solution is provided for the fields of functional packaging, medical protective films, intelligent flexible devices and the like.

The invention discloses an aramid honeycomb core glass fiber reinforced interlayer cargo hold lining plate and a manufacturing method, the cargo hold lining plate comprises an upper skin layer, a glue film layer, an aramid honeycomb core layer, a glue film layer and a lower skin layer which are laminated in sequence, and the upper skin layer and the lower skin layer are each composed of two layers of satin fabric phenolic aldehyde glass fiber prepreg and an outer polyvinyl fluoride film; the prepreg paving angles of the upper and lower skin layers are perpendicular to each other and are parallel or perpendicular to the directions of the honeycomb core strip grooves; all the layers are integrally formed through co-curing. By optimizing the laying angle design and adopting the polyvinyl fluoride film to replace a traditional TADLAR film, an adaptive adhesive film and prepreg, the problems that an existing lining plate is poor in mechanical balance, not firm in interface bonding and prone to failure of a surface layer are solved, and the composite lining plate has excellent mechanical property, flame-retardant safety and environment-resistant stability and is suitable for the field of aviation.

A polyfluoroethylene / fluorinated graphene composite material and a forming method thereof, wherein the forming method of the polyfluoroethylene / fluorinated graphene composite material comprises: uniformly mixing fluorinated graphene powder and polytetrafluoroethylene powder to obtain polytetrafluoroethylene / fluorinated graphene composite powder; pressing the obtained polytetrafluoroethylene / fluorinated graphene composite powder through a flat die without limitation in four directions to obtain a preformed composite material; and further pressing the obtained preformed composite material in a closed die to obtain a polyfluoroethylene / fluorinated graphene composite material with ultra-low dielectric constant and ultra-low dielectric loss at a high working frequency (GHz). The polyfluoroethylene / fluorinated graphene composite material with ultra-low dielectric constant and ultra-low dielectric loss has excellent mechanical properties; and the addition of a small amount of fluorinated graphene not only effectively reduces the dielectric loss of polytetrafluoroethylene, but also effectively improves the mechanical properties of polytetrafluoroethylene.

The invention relates to the technical field of shoe sole molds, in particular to a TPU outsole processing and forming mold and a forming method thereof.The forming mold comprises an upper mold and a lower mold, the upper mold comprises a plurality of pressing mold blocks, and a plurality of mold cavities connected with the corresponding pressing mold blocks in a clamped mode are formed in the upper end face of the lower mold; a polyvinyl fluoride layer and a sand blasting layer are sequentially arranged on the groove wall of the mold cavity from outside to inside, each pressing module comprises a mounting base, the lower end face of each mounting base extends downwards to form a pressing block, the radial distance of each pressing block is smaller than that of each mounting base, and a containing groove is defined by the lower end face of each mounting base and the side face of each pressing block.

The application discloses a recycling method of lithium iron phosphate positive electrode material and the lithium iron phosphate positive electrode material, and belongs to the technical field of lithium batteries. The lithium iron phosphate positive electrode material comprises a positive electrode active material, a conductive agent and a binder. The binder is obtained by blending a furfuryl alcohol resin and an aldehyde-based crosslinking agent after a free radical graft polymerization reaction of polyvinyl alcohol and an unsaturated carboxylic acid. The binder is crosslinked during the drying process of the lithium iron phosphate positive electrode material. The positive electrode active material, the conductive agent and the binder are ground with water to obtain a positive electrode slurry. The lithium iron phosphate positive electrode material is obtained through coating, vacuum drying, tabletting, slicing and vacuum drying. The binder can improve the performance of the lithium iron phosphate positive electrode material. The binder has better solubility than polyvinylidene fluoride. Alcohol solvents can penetrate into the crosslinked network, destroy the crosslinked part, dissolve the binder, and do not need to use strong acid and strong alkali solvents, thereby being more environmentally friendly. The recycling residue does not contain fluorine elements and aluminum, and is beneficial to the recycling and treatment of waste batteries.

The invention provides a high-strength high-wear-resistance polyester composite fiber, and relates to the field of chemical fibers. The skin layer coats the outer side of the core layer; the core layer is prepared from polyester; the skin layer is prepared from modified polyvinyl fluoride; the modified polyvinyl fluoride is prepared by soaking a polyvinyl fluoride polymer in a modification solution and modifying the polyvinyl fluoride polymer through ultraviolet radiation; the modified solution is prepared from a benzophenone compound, a disulfide compound, an acrylate substance and dioxane; the molar ratio of the benzophenone compound to the disulfide compound to the acrylate substance is 1: 1: (100-400). The high-strength high-wear-resistance polyester composite fiber provided by the invention solves the problem that wear-resistant polyester fibers in the prior art cannot have good wear resistance, stability and environmental friendliness at the same time; the wear-resistant polyester fiber provided by the invention has the advantages of high performance, good use experience and environmental protection.

The invention discloses a carbon nanotube coating aging protection process, and belongs to the technical field of material protection. Comprising the following four core steps: gradient interface modification pretreatment, preparation of a double-structure inorganic protective layer, construction of a temperature-sensitive organic protective layer and interface synergistic reinforcement post-treatment. An interface reinforcement transition layer is constructed through argon, oxygen and carbon tetrafluoride mixed gas plasma treatment and aminated carbon quantum dot synergistic modification; the preparation method comprises the following steps: preparing a double-structure inorganic protective layer by combining magnetron sputtering and sol coating, constructing a temperature-sensitive organic protective layer by using a polyvinyl fluoride-acrylate copolymer containing a phase change microcapsule and a compound anti-ultraviolet agent, and finally promoting an inorganic-organic interface to form a Si-O-C covalent bond through ultraviolet-heat synergistic treatment. Through multi-step collaborative design, the problems that in a traditional technology, a carbon nano tube coating is single in protection function and rapid in aging failure are solved, the aging speed is reduced after treatment, and the heat conduction and spectral absorption core performance of the carbon nano tube is stably reserved.

The application provides a multilayer flexible composite functional film and a preparation method thereof, which comprises a film layer 1 and a film layer 2, the film layer 1 comprises an outer film layer and an emission layer, the film layer 2 comprises a reflection layer and an inner film layer, and the structure is sequentially stacked from top to bottom as the outer film layer, the emission layer, the reflection layer and the inner film layer. The material of the inner film layer and the outer film layer is any one of transparent polyvinyl fluoride (PVF), polyvinylidene fluoride (PVDF) or polyvinyl chloride (PVC) or a combination thereof, the material of the emission layer is bead-shaped carbon black particles, the infrared emissivity of the outer surface of the functional film is improved, and then the heat is prevented from gathering on the outer surface, so that the outer surface of the functional film is efficiently radiated. The material of the reflection layer is sheet-shaped aluminum, the reflection layer can realize efficient reflection of sunlight, the heat is prevented from being absorbed on the outer surface of the multilayer flexible material in a large amount, and the effect of rapid heat dissipation is achieved.

The utility model discloses a lining oil pipe, which relates to the technical field of pipeline transportation of petroleum, natural gas and the like, and comprises an oil pipe outer pipe, external threads are arranged on the outer side of the oil pipe outer pipe at equal intervals, a lining pipe main body is arranged inside the oil pipe outer pipe, and an adhesive is arranged between the inside of the oil pipe outer pipe and the outer side of the lining pipe main body. A protective layer is arranged on the outer side of the oil pipe outer pipe. According to the lining oil pipe disclosed by the utility model, the outer pipe of the oil pipe is made of a low-alloy high-strength steel material, so that the oil pipe has excellent mechanical strength and toughness and can stably operate under high-temperature and high-pressure conditions. The lining pipe body is jointly composed of the polyvinyl fluoride layer and the glass fiber reinforced polyester layer, polyvinyl fluoride has excellent chemical corrosion resistance, damage of a conveying medium to the pipeline is effectively prevented, and therefore the service life of the pipeline is remarkably prolonged. The outer protective layer of the oil pipe outer pipe is composed of a polyethylene coating and a polypropylene coating, and the coatings provide additional protection for the pipeline and enhance the wear resistance and impact resistance.

The invention relates to the technical field of composite coatings, in particular to an impact-resistant energy-absorbing and long-acting corrosion-resistant integrated composite coating for a marine steel structure, which sequentially comprises a substrate treatment layer, an energy-absorbing elastic layer, an intelligent corrosion-resistant layer and a wear-resistant anti-fouling surface layer from inside to outside from the surface of a base material, the substrate treatment layer contains modified epoxy zinc-rich resin and other components, the energy-absorbing elastic layer comprises a composite elastomer, a modified ACF artificial cartilage material and the like, the intelligent anti-corrosion layer contains modified epoxy resin, response type microcapsules and the like, and the wear-resistant anti-fouling surface layer contains modified polyvinyl fluoride resin and other related components. According to the composite coating, impact resistance, energy absorption and long-acting corrosion prevention are integrated, interlayer combination is firm, the intelligent corrosion prevention response and early warning functions are achieved, the anti-aging, wear-resisting and anti-pollution performance is excellent, and the service life of a maritime work steel structure is greatly prolonged.

The invention provides a high-strength wear-resistant modified polyester fiber and a preparation method thereof, and relates to the field of chemical fibers. The middle layer coats the outer side of the core layer; the skin layer covers the outer side of the middle layer; the core layer is prepared from polyester; the middle layer is prepared from modified polyvinyl fluoride; the skin layer is prepared from polyvinyl fluoride; the modified polyvinyl fluoride is prepared by soaking a polyvinyl fluoride polymer in a modification solution; the modified solution is prepared from a benzophenone compound, a disulfide compound, an acrylate substance and dioxane; wherein the molar ratio of the benzophenone compound to the disulfide compound to the acrylate substance is 1: 1: (100-400). The wear-resistant polyester fiber can solve the problem that the wear-resistant polyester fiber in the prior art cannot have good wear resistance, stability and environmental friendliness at the same time; the wear-resistant polyester fiber provided by the invention has high performance and good use experience and is environment-friendly.

Provided is a method of manufacturing a brush, such as a wafer cleaning brush. The method includes providing a polyvinyl alcohol (PVA) solution, forming an insoluble polyvinyl fluoride (PVF) by adding formaldehyde to the PVA solution, adding a water-soluble inorganic compound including a plurality of particles to the insoluble PVF, and mixing the insoluble PVF with the water-soluble inorganic compound to form a mixture of the water-soluble inorganic compound and the insoluble PVF, forming a brush by inserting the mixture of the water-soluble inorganic compound and the insoluble PVF into a mold and heat-treating the mixture, removing the wafer cleaning brush from the mold; and washing the wafer cleaning brush to remove the plurality of particles of the water-soluble inorganic compound from the wafer cleaning brush.

This invention discloses a wear-resistant and corrosion-resistant photovoltaic bracket and its preparation method. The bracket includes a modular high-strength support frame and a double-layer composite wear-resistant and corrosion-resistant coating. The frame is integrally molded from a three-reinforcing phase synergistic gradient-reinforced aluminum-based composite material consisting of micron-sized silicon carbide, nano-sized titanium boride, and graphene nanosheets. The reinforcing phases are gradient-distributed from the surface to the core, and the graphene nanosheets are modified with ethyl cellulose. The bottom layer of the coating is a cerium-zinc-aluminum-magnesium alloy plating, and the top layer is a polyvinyl fluoride coating containing nano-alumina-silicon nitride composite particles. The preparation method includes raw material pretreatment, gradient composite molding, heat treatment strengthening, frame processing, coating preparation, and assembly steps. This invention breaks through the performance bottlenecks of traditional materials, achieving a synergistic effect of ultra-high strength and high toughness, self-lubrication, and fatigue wear resistance. It exhibits excellent wear and corrosion resistance, significant lightweighting of the bracket, environmentally friendly and low-energy-consumption manufacturing process, convenient transportation and installation, low total life-cycle cost, and long service life.

The invention relates to the technical field of polyvinylidene fluoride materials, in particular to a polyvinylidene fluoride offshore photovoltaic cable material. The polyvinylidene fluoride offshore photovoltaic cable material is prepared from the following raw materials in parts by mass: 40 to 70 parts of polyvinylidene fluoride, 20 to 50 parts of polyvinyl chloride, 5 to 15 parts of ethylene-trifluorochlor oethylene copolymer, 1 to 3 parts of perfluoroethyl vinyl ether, 0.1 to 1 part of dicumyl peroxide, 0.1 to 1 part of nano zinc oxide, 1 to 3 parts of calcium-zinc stabilizer, 10 to 30 parts of filler, 1 to 2 parts of lubricant and 0.5 to 1.5 parts of stearic acid. 1-2 parts of a plasticizer and 1-2 parts of a compatilizer. The requirement for long-term stable operation of an offshore photovoltaic cable in high-salt, high-humidity, high-temperature and strong-ultraviolet environments is effectively met, the requirement for long-term stable operation under severe offshore conditions is fully met, and meanwhile the preparation method is simple and suitable for large-scale application and popularization.

This invention provides a photothermal conversion phase change insulation flexible composite pipe and its preparation method, comprising a base pipe layer and, from the inside out, an adhesive transition layer, a phase change insulation layer, a photothermal conversion layer, and a protective layer. The base pipe layer consists of an inner lining layer, a double-layer fiber reinforcement layer, and an outer protective layer. The adhesive transition layer is a mixture of ethylene-vinyl acetate copolymer and silane coupling agent. The phase change insulation layer uses modified melamine foam as a skeleton, loaded with erythritol phase change material and nano-silica. The photothermal conversion layer is a composite layer of polydopamine and waterborne polyurethane. The protective layer is a polyvinyl fluoride layer. The preparation method includes extrusion winding of the base pipe layer, thermal spraying of the adhesive transition layer, vacuum impregnation and hot pressing of the phase change insulation layer, spraying and drying of the photothermal conversion layer, and extrusion cooling and shaping of the protective layer. This invention achieves a combination of photothermal conversion energy storage and flexible insulation, with strong layer bonding, good flexibility, high mechanical strength, low heat loss, energy saving and environmental protection, and is suitable for various scenarios such as centralized heating and industrial steam transportation.

The invention discloses a preparation method and preparation and detection equipment of a high-efficiency low-resistance waterproof piezoelectric filter material, and the preparation method comprises the following steps: carrying out liquid-phase ultrasonic stripping on MoS2 to prepare a MoS2 dispersion liquid, mixing the MoS2 dispersion liquid, fluorinated SiO2 nanoparticles and a polyvinylidene fluoride solution, carrying out ultrasonic treatment and stirring to prepare a three-phase composite spinning solution, and carrying out ultrasonic treatment on the three-phase composite spinning solution to prepare the high-efficiency low-resistance waterproof piezoelectric filter material. Finally, spinning and polarization treatment are carried out through an electrostatic spinning mechanism, and the piezoelectric filter material is directly obtained. The preparation and detection equipment is composed of an electrostatic spinning mechanism, a material receiving mechanism, a conveying mechanism, a powder feeding mechanism and a detection mechanism, the electrostatic spinning mechanism and the material receiving mechanism are responsible for forming and functionalizing the piezoelectric filter material, the conveying mechanism conveys the piezoelectric filter material, the powder feeding mechanism provides dust, and the detection mechanism measures the filtering efficiency, resistance, hydrophobicity and piezoelectricity of the piezoelectric filter material on line. Through collaborative design of a material formula, integrated preparation and detection equipment, the production efficiency can be improved, the cost can be reduced, and the comprehensive performance of the piezoelectric filter material can be accurately evaluated in real time.

The invention relates to the technical field of anchor chain equipment, and particularly discloses an impact-resistant anchor chain structure and method.The anchor chain comprises a plurality of chain rings connected in sequence, impact-resistant buffer layers covering the surfaces of the chain rings and corrosion-resistant coatings, and detachable separation chain hooks are arranged between equally-spaced chain links formed by the adjacent chain rings; the chain ring body is made of high-strength alloy steel with specific components, the impact-resistant buffer layer is of a sandwich structure of an aluminum alloy honeycomb core and a carbon fiber reinforced epoxy resin composite panel, and the corrosion-resistant coating is of a double-layer system of a zinc-aluminum alloy bottom layer and a polyvinyl fluoride modified epoxy resin surface layer. The preparation method sequentially comprises the steps of chain ring body preparation, detachable separation chain hook preparation, anti-impact buffer layer preparation, assembly, coating preparation and performance detection.The anchor chain has excellent anti-impact performance, marine corrosion resistance and convenient disassembly and assembly maintainability, can meet the long-term use requirement in the severe marine environment, and is suitable for being used in the marine environment. The service life of the anchor chain is obviously prolonged and the operation and maintenance cost is reduced.

The application belongs to the technical field of functional composite materials and piezoelectric materials, and specifically discloses a bismuth titanate powder filled polyvinyl fluoride composite piezoelectric film and a preparation method thereof. The preparation method comprises the steps of raw material preparation, preparation of a PVDF composite solvent system, addition and uniform dispersion of fillers, blade coating, low-temperature vacuum drying and stripping. The application realizes the uniform dispersion of bismuth titanate powder or manganese and niobium co-doped bismuth titanate powder in a PVDF matrix by optimizing the ratio of a DMF and acetone composite solvent system, adopting a combined ultrasonic dispersion mode, and introducing a blade coating film forming process and a low-temperature rapid vacuum drying process. Meanwhile, the mass ratio of raw materials is precisely controlled. On the basis of simplifying the preparation process and shortening the film forming period, the piezoelectric performance and structural compactness of the composite film are improved, and the defects of the existing preparation method, such as uneven filler dispersion, insufficient flexibility, low film forming efficiency, and limited improvement of the piezoelectric performance of the film, are solved.

This utility model relates to the field of waste recycling technology in polyvinyl fluoride (PVC) film production, and discloses a recycling device for PVC film production waste edge material, including a recycling box. A flexible conduit is fixedly provided on one side of the recycling box, and an exhaust hood is fixedly connected to the air inlet end of the flexible conduit. An exhaust fan is fixedly installed on one side of the recycling box, and a base is fixedly provided at the bottom of the recycling box. A height adjustment component for adjusting the height of the exhaust hood is provided on one side of the base, and a support plate is provided at the bottom end of the recycling box. By drawing air out of the recycling box through the exhaust fan, a negative pressure state can be created inside. The recycling box can extract the PVC film waste edge material through the flexible conduit and the exhaust hood, eliminating the need for manual cleaning and reducing labor intensity. A pressure plate is driven by a compression cylinder, which can apply pressure to the collected waste edge material, compressing it and saving space.

This invention discloses a polyvinyl fluoride (PVC) film, characterized in that: the film-forming formula of the PVC film comprises 100 parts of PVC resin and 0.5-2 parts of a nucleating agent; the PVC resin is selected from at least one of PVC homopolymer or copolymer of PVC and other fluorinated monomers, the PVC resin has a weight-average molecular weight of 450,000-1,200,000, a molecular weight distribution of 1.1-2.0, a crystallinity of 40%-60%, and a crystal size of 4.0-10.0 nm; the nano-nucleating agent is inorganic nanoparticles with a particle size of 1-60 nm and a specific surface area of ​​10-800 m². 2 / g. The polyvinyl fluoride film of the present invention has excellent weather resistance, tear resistance and helium barrier properties, and can be used as a protective layer or barrier layer for aircraft composite materials, thereby effectively extending the service life of aircraft.

This invention relates to the field of crane technology, and discloses a superhydrophobic anti-corrosion coating and lifting equipment. The superhydrophobic anti-corrosion coating contains a fluorinated multi-component copolymer and fluorinated polymer particles; the weight ratio of the fluorinated multi-component copolymer to the fluorinated polymer particles is 1:0.5-4; the fluorinated multi-component copolymer is a binary copolymer and / or a ternary copolymer, wherein the binary copolymer is a copolymer of vinylidene fluoride and hexafluoropropylene, and the ternary copolymer is a copolymer of vinylidene fluoride, tetrafluoroethylene, and hexafluoropropylene; the fluorinated polymer particles are selected from fusible polytetrafluoroethylene, fluorinated ethylene propylene copolymer, polytetrafluoroethylene, polyvinylidene fluoride, polychlorotrifluoroethylene, polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymer, and ethylene-chlorotrifluoroethylene copolymer. This superhydrophobic anti-corrosion coating, using a blend of fluorinated multi-component copolymer and fluorinated polymer particles, improves the superhydrophobic and anti-corrosion properties of the coating.

The utility model provides a cutter for processing a PVF (Polyvinyl Fluoride) filter element, which comprises a cutter body middle section, wherein a cavity is formed in the cutter body middle section, and a discharge hole is formed in the outer wall of the cutter body middle section; the knife body connecting section is arranged at the upper end of the knife body middle section; the cutter body lower section is concentrically arranged at the lower end of the cutter body middle section, a through hole communicated with the cavity is formed in the cutter body lower section, and a cutting edge is arranged at the lower end of the cutter body lower section. Compared with the prior art, the discharging port is formed in the outer wall of the cutter middle section, the cutter body lower section is concentrically arranged at the lower end of the cutter body middle section, the through hole communicated with the cavity in the cutter body middle section is formed in the cutter body lower section, and the cutting edge arranged at the lower end of the cutter body lower section is used for cutting a block-shaped base material to form a cylindrical material; the cylindrical material can enter the cavity through centrifugal force borne by rotation of the cutter and is thrown out of the discharging port through the centrifugal force, automatic discharging is achieved, manual intervention is not needed, continuous cutting machining of the cylindrical filter element can be achieved on a blocky base material, and the production efficiency is effectively improved.

The utility model discloses a special super-weather-resistant and corrosion-resistant waterproof multi-layer composite film for a PVF fluorocarbon wall. The special super-weather-resistant and corrosion-resistant waterproof multi-layer composite film comprises a PVF single-layer film layer, an adhesive layer, a hydrolysis-resistant POE film layer, a butyl rubber layer and a PE release film layer, the hydrolysis-resistant POE film layer is arranged between the PVF single-layer film layer and the PE release film layer; the double-component glue layer is arranged between the PVF single-layer film layer and the hydrolysis-resistant POE film layer; the butyl rubber layer is arranged between the hydrolysis-resistant POE film layer and the PE release film layer. On the premise of achieving water resistance and corrosion resistance of the wall body, the weather resistance is greatly improved, the production efficiency is improved, and the production energy consumption is reduced.

The invention relates to the technical field of ship and ocean engineering, in particular to an ice-impact-resistant gradient foamed aluminum sandwich plate and a preparation method thereof. The ice-impact-resistant gradient foamed aluminum sandwich plate is prepared from industrial pure aluminum powder, a modified titanium hydride foaming agent, a metal material for an upper panel, a metal material for a lower panel, an epoxy modified acrylate adhesive, a surface pretreatment material and an anti-corrosion material. The modified titanium hydride is coated with silicon dioxide, so that the pore structure of the foamed aluminum can be regulated and controlled, and the uniformity and stability of the core layer are improved; the epoxy modified acrylate adhesive has strong adhesion and toughness by utilizing the synergistic effect of epoxy resin and acrylate, so that the interface bonding between the panel and the foamed aluminum core layer is strengthened; the modified polyvinyl fluoride coating is modified by nano zinc oxide, so that the corrosion resistance and the adhesive force of the coating are enhanced; the three modified materials are cooperated with other materials, so that when the sandwich plate is resistant to ice impact, long-term service is guaranteed by means of plastic energy absorption of the gradient foamed aluminum core layer, load transmission of an adhesive interface and the anticorrosive layer.