70 results about "ETFE" patented technology

The invention relates to the technical field of coating preparation, and provides a super-hydrophobic oleophobic epoxy anticorrosive wear-resistant powder coating and a preparation method thereof. According to the coating, phenolic epoxy resin and bisphenol A epoxy resin are used as matrix resin, phenolic hydroxyl resin is used as a curing agent, super-hydrophobic / oleophobic carbon nanotubes are used as a modifier, ethylene-tetrafluoroethylene copolymer and polyamide resin are used as flexibilizers, super-hydrophobic / oleophobic nano silicon dioxide powder and super-hydrophobic hollow glass beads are used as fillers, and the super-hydrophobic / oleophobic nano silicon dioxide powder and the super-hydrophobic hollow glass beads are used as fillers. The super-hydrophobic and oleophobic epoxy anti-corrosion wear-resistant powder coating is prepared by taking an inorganic pigment as a coloring agent through the steps of material preparation, premixing, melt extrusion, tabletting, cooling, crushing and sieving under the cooperation of various functional assistants. The powder coating is subjected to electrostatic spraying (40-70 KV), the coating film thickness is about 350 microns, and the powder coating is cured into a film after being subjected to hydrophobic / oleophobic min at 180 DEG C / 5 min or 230 DEG C / 1.5 under the baking condition of 180 DEG C / 5 min. The contact angles of oil drops and water drops can reach 160 degrees and 161 degrees respectively, and the rolling angles are 2 degrees and 1 degree respectively.

This application relates to the field of insulating materials, specifically disclosing a flexural insulating material, its preparation method, and a robot cable, comprising the following raw materials in parts by weight: 50-80 parts of low-density polyethylene, 30-40 parts of medium-density polyethylene, 30-40 parts of ethylene-tetrafluoroethylene-perfluoropropyl vinyl ether terpolymer, 1-20 parts of filler, 3-8 parts of compatibilizer, 0.1-5 parts of crosslinking agent, and 0.1-5 parts of co-crosslinking agent. This invention addresses the performance shortcomings of existing insulating materials, achieving a balance of flexural resistance, abrasion resistance, insulation stability, and excellent flexibility, thus meeting the stringent requirements of high-frequency cables used in robots / manipulators.

The invention discloses an antistatic teflon sleeve and a preparation method thereof. The antistatic teflon sleeve is prepared from the following components in parts by weight: 80-95 parts of teflon resin, 5-20 parts of a core-shell structure conductive filler, 1-3 parts of a compatilizer, 0.5-2 parts of a flexibilizer and 0.1-0.5 part of an antioxidant. The outer protective layer is prepared from the following components in parts by weight: 70 to 85 parts of ethylene-tetrafluoroethylene copolymer, 5 to 15 parts of modified nano silicon dioxide, 5 to 10 parts of fluororubber, 1 to 3 parts of antistatic aid and 0.1 to 0.5 part of ultraviolet absorbent. Through the design of the core-shell structure conductive filler, the core layer nano copper powder provides high conductivity, the shell layer PVDF has good compatibility with the Teflon base material, the surface modification layer further enhances the interface bonding force, the volume resistivity of the inner layer base material is reduced, and the antistatic requirement is met; the conductive filler is uniformly dispersed in the base material instead of a surface coating, so that the antistatic performance failure caused by friction or bending is avoided, and the antistatic performance is lasting and stable.

The application relates to the technical field of electric wire and cable, and discloses a fluoroplastic insulation high-temperature-resistant fireproof cable and a preparation method, the cable comprises a conductor layer, the conductor layer is twisted by multiple copper wires, the conductor layer is coated with a fluoroplastic insulation layer, the fluoroplastic insulation layer is coated with a shielding layer, the shielding layer is a copper-belt woven structure, the shielding layer is coated with an armor layer, the armor layer is woven by stainless steel wires, the armor layer is coated with a sheath layer, and the sheath layer comprises the following components in mass fractions: functionalized ethylene-tetrafluoroethylene copolymer, 50-70 parts by mass. The application constructs an interpenetrating polymer network formed by in-situ crosslinking of a functionalized fluoropolymer and an organic silicon elastomer in the sheath layer, and adopts an energy field gradient response vulcanization process, so that the prepared cable sheath keeps the inherent high-temperature resistance of fluoroplastic, and the flexibility and mechanical strength of the material are improved.

The application discloses a kind of super-high flexible robot cables, belong to robot cable technical field.Symmetrical layered structure is used, from inside to outside in turn: cable core, insulating layer, shielding layer and sheath layer.Cable core uses layered structure of stranding, significantly improve the fatigue resistance of cable, prolongs service life;Insulating layer uses ethylene-tetrafluoroethylene copolymer, with good flexibility, and can adapt to complex working environment;Shielding layer uses aluminum foil-tin coated copper wire, provides good electromagnetic shielding effect, reduces signal interference, improves the operation accuracy and reliability of robot system;Sheath layer uses thermoplastic polyurethane elastomer as matrix, and introduces the modifier of independent research and development, substantially improves the flame retardance and flexibility of cable;Therefore, the cable prepared by the application has high flexibility and flame retardance, and can be widely used in industrial robots, medical manipulators, service robots and other high-demand scenarios.

The application discloses a kind of space stable organic radiation refrigeration coatings and preparation method and application thereof, including optical layer and protective layer coated on the optical layer;The optical layer includes the following components by mass fraction:25~35% first polymer matrix, 35~45% first organic scattering particles, 20~40% first organic solvent;The protective layer includes the following components by mass fraction:60~75% second polymer matrix, 5~10% second organic scattering particles, 15~35% second organic solvent;Wherein, the first organic scattering particles and second organic scattering particles are independently selected from one or several of polytetrafluoroethylene, perfluoroolefin ether alkane, ethylene-tetrafluoroethylene copolymer respectively.In the meantime that space stability is guaranteed, coating weight is significantly reduced, and a new idea of considering performance and cost is provided for spacecraft thermal control.

The invention relates to the technical field of cables, and discloses a light weather-proof insulated cable for an unmanned aerial vehicle. The insulated cable sequentially consists of a conductor, a carbon-based coating insulating layer and a modified aramid sheath layer, the carbon-based coating insulating layer is composed of an inner skin layer ETFE ethylene-tetrafluoroethylene copolymer, a middle layer foaming ETFE ethylene-tetrafluoroethylene copolymer and an outer skin layer carbon-based coating. And weaving and wrapping the modified aramid fiber on the surface of the carbon-based coating insulating layer of the conductor through a high-speed weaving machine to form a modified aramid sheath layer. Organic silicon aromatic polyamide contains a large number of aromatic polyamide structural units, the compatibility with aramid fibers is remarkably improved, the organic silicon aromatic polyamide can be uniformly dispersed in the aramid fibers, and the organic silicon aromatic polyamide contains a flexible siloxane structural monomer and a rigid aromatic polyamide structural unit, so that the fibers have excellent elongation at break and flexibility while keeping high breaking strength, and the mechanical property of the fibers is improved. And as a sheath layer of the cable, the cable is convenient to wind.

This invention relates to the field of polymer synthesis technology. This invention provides a controlled polymerization method for a high-alternation-degree ETFE copolymer, comprising the following steps: (1) adding a solvent to a high-pressure reactor, replacing the air, and then filling it with an initial monomer mixture to a total pressure of 1.5-2.5 MPa, wherein the monomer mixture is a mixture of tetrafluoroethylene and ethylene; (2) heating to 60-85°C, adding an initiator to initiate the polymerization reaction; (3) simultaneously adding the monomer mixture continuously or semi-continuously during the polymerization reaction; (4) adding a chain transfer agent, and discharging the product after the reaction, i.e., the high-alternation-degree ETFE copolymer. This invention also provides a controlled polymerization method for a high-alternation-degree ETFE copolymer. This invention also provides an application of the high-alternation-degree ETFE copolymer in new energy, aerospace, high-end equipment manufacturing, and photovoltaic fields. The high-alternation-degree ETFE copolymer of this invention has high alternation degree (>92%), high thermal stability, and excellent mechanical properties.

The invention relates to the technical field of building materials, and particularly discloses anti-crack bare concrete. The anti-cracking bare concrete is prepared from the following raw materials in parts by weight: 320 to 340 parts of cement, 48 to 52 parts of stone powder, 9 to 11 parts of silicon powder, 43 to 47 parts of an anti-cracking agent, 720 to 740 parts of natural sand, 730 to 750 parts of granite macadam with the particle size of 10 to 20 mm, 290 to 310 parts of granite macadam with the particle size of 5 to 10 mm, 150 to 160 parts of water and 9 to 11 parts of a polycarboxylate superplasticizer. Wherein the anti-cracking agent is prepared from the following raw materials: carbon nanofibers, phase change microcapsules, an ethylene-tetrafluoroethylene copolymer, hyperbranched polyester, a silane coupling agent and a nano silicon dioxide dispersion liquid. The anti-crack fair-faced concrete can be used for engineering scenes with requirements for apparent quality and durability, and has the advantages of long-acting crack resistance, high anti-permeability grade and excellent volume stability.

The invention relates to the technical field of cable protection layers, in particular to a corrosion-resistant underground cable protection layer and a preparation method thereof. The corrosion-resistant underground cable protection layer comprises 75-82 parts of high-density polyethylene, 10-15 parts of an ethylene-tetrafluoroethylene copolymer, 4-6 parts of a compatibilizer, 10-15 parts of glass fibers, 1-3 parts of calcium stearate, 5-10 parts of a dopamine modified filler, 5-10 parts of aminated boron nitride, 1-4 parts of a waterproof agent, 6-10 parts of a flame retardant and 2.5-3 parts of an antioxidant. The dopamine modified filler comprises dopamine modified polyaspartic acid and dopamine modified zinc oxide. According to the invention, the high-density polyethylene and the ethylene-tetrafluoroethylene copolymer are taken as a matrix and are matched with the dopamine modified filler, so that the underground cable protection layer is endowed with excellent acid and alkali corrosion resistance. And by adding aminated boron nitride and glass fiber, the mechanical strength is further improved, and the service life of the cable protection layer is remarkably prolonged.

The invention relates to the technical field of film compounding, and discloses an OCA optical cement-based ETFE film and water oxygen barrier film compounding process, which comprises the following steps: S1, ETFE film pretreatment; s2, pretreating a water-oxygen barrier film; s3, preparation of OCA optical cement; s4, coating is conducted; s5, compounding; s6, staged curing is conducted; and S7, carrying out online detection. According to the ETFE film and water-oxygen barrier film compounding process based on the OCA optical cement, the composite surface of the ETFE film is treated through argon-oxygen mixed gas plasma, the chemical inertness of the surface of the ETFE film is broken, and the affinity of the ETFE film and the OCA optical cement is improved; meanwhile, the composite surface of the AlO-SiO composite barrier film is coated with the KH560 layer, the KH560 layer can serve as a connecting bridge between the AlO-SiO composite barrier film made of an inorganic material and the OCA optical cement made of an organic material, the interfacial compatibility of the AlO-SiO composite barrier film made of the inorganic material and the OCA optical cement made of the organic material is improved, and therefore the peel strength between film layers after compounding is improved, the decrease amplitude of the peel strength after ultraviolet aging can be reduced, and the service life of the AlO-SiO composite barrier film is prolonged. The long-term use reliability of the composite membrane is ensured.

The application discloses a three-layer composite material for a gear pump and a preparation method thereof. The composite material comprises a metal base layer, a copper powder layer sintered on one side of the metal base layer, and a plastic layer embedded in and covering the copper powder layer. The plastic layer is prepared from the following components: calcium fluoride, ETFE, nano-aluminum oxide, graphite, iron red, and PTFE emulsion. ETFE is a tetrafluoroethylene-ethylene alternating copolymer. ETFE has a certain blending compatibility with the PTFE plastic matrix, and can form better bonding force in a sintered state. The calcium fluoride material has the characteristics of low-temperature brittleness and high-temperature plasticity. Under high-speed and high-load conditions, the high-plasticity calcium fluoride is easy to combine with PTFE under the influence of friction heat, and the transfer and consumption process can be more smooth, thereby improving the product performance. Through the cooperation of the components, the obtained plastic layer has high bonding strength, and the running time under continuous pressure durability test is significantly improved.

The invention relates to the technical field of cables, and provides a corrosion-resistant aerial insulated cable which sequentially comprises a conductor, a shielding layer and an insulating layer from inside to outside. The conductor sequentially comprises an inner core layer and an outer core layer from inside to outside; the inner core layer is composed of six aluminum alloy conductors with the same diameter, and the outer core layer is composed of ten aluminum alloy conductors with the same diameter. The shielding layer is an aluminum foil shielding layer; the insulating layer comprises the following components in parts by weight: 70-80 parts of polyethylene, 20-35 parts of an ethylene-vinyl acetate copolymer, 15-20 parts of corrosion-resistant master batch, 25-30 parts of calcium carbonate, 1-2 parts of a light stabilizer, 2-3 parts of a lubricant, 1-2 parts of an antioxidant and 1-2 parts of a vulcanizing agent; the corrosion-resistant master batch is prepared from the following components in parts by weight: 65 to 70 parts of fluororubber, 5 to 9 parts of modified montmorillonite, 8 to 15 parts of ethylene-tetrafluoroethylene copolymer and 1 to 3 parts of sodium stearate. According to the technical scheme, the problem of poor corrosion resistance of the overhead insulated cable in the prior art is solved.

The application discloses a kind of modular flexible hinge and preparation method thereof, belong to spacecraft flexible solar cell wing manufacturing technical field, comprising: S1, glass fibre aluminium foil is bonded on the corresponding area of lower polyimide film upper surface hinge hole;S2, first solidification forming;S201, polyimide film upper surface is superimposed glass fibre prepreg;S202, in glass fibre prepreg and glass fibre aluminium foil upper surface superimposed upper polyimide film;S203, using groove ETFE board material and ETFE stick material are first solidification forming to obtain the hinge semi-finished product with semicircle arc;S3, second lamination solidification forming;S301, in upper polyimide film upper surface superimposed glass fibre prepreg;The width of overlapping area of glass fibre aluminium foil and glass fibre prepreg is 3mm;S302, fold hinge semi-finished product.The application can solve the problems that existing flexible solar wing hinge is easy to tear and easy to deform in configuration.

The invention discloses a modified ETFE material and application thereof, and the modified ETFE material comprises 90-100 parts by mass of ETFE, 0.5-2 parts by mass of an anti-ultraviolet agent, 0.2-0.6 part by mass of an antioxidant, 0.2-1 part by mass of a light stabilizer, 0.2-1 part by mass of a heat stabilizer, 0.5-10 parts by mass of modified ATO and 3-12 parts by mass of a coupling agent. The modified ETFE material provided by the invention has the characteristics of excellent mechanical strength, weather resistance, self-cleaning property and the like, also has excellent infrared barrier property, and is particularly suitable for being applied to preparation of ETFE films for high infrared barrier buildings.

A laminate includes, in this order: a fluororesin layer containing an ethylene-tetrafluoroethylene copolymer; an adhesive layer containing an aminosilane coupling agent; and a resin substrate containing an ultraviolet absorber and a resin.

It is an object of the present disclosure to provide a porous hollow fiber membrane for membrane distillation that has excellent chemical resistance, mechanical strength and membrane distillation performance, as well as a membrane module for membrane distillation and a membrane distillation method using the same.SOLUTION: A total of areas of plastic parts having an area of 1 μ m2 or less included in each field of view is 70% or more with respect to the total area of the plastic parts, a total of areas of plastic parts having an area of 10 μ m2 or more is 15% or less with respect to the total area of the plastic parts, and a total of areas of plastic parts having an area of 1 μ m2 or less is 70% or more with respect to the total area of the plastic parts. And the total of the areas of the plastic parts having an area of 10 μ m2 or more is 15% or less with respect to the total area of the plastic parts.SELECTED DRAWING: Figure 1

The utility model discloses a shirt with an NFC (Near Field Communication) electronic tag, which aims to solve the problem of quickly acquiring personnel information during emergency rescue. The shirt comprises a shirt body and an electronic tag piece, the electronic tag piece is arranged between the shirt body and a shirt pocket, and the shirt body and the shirt pocket are connected through textile sewing. The electronic tag piece has a three-layer structure: a protective lining layer is made of modal fibers, is soft and comfortable, has strong hygroscopicity, and can buffer and protect the NFC electronic tag; the high-temperature-resistant waterproof layer is an ethylene-tetrafluoroethylene copolymer film, is waterproof and high-temperature-resistant, and ensures the stability of the The wear-resistant layer is made of polyester fiber fabric, is wear-resistant and enables the label piece to be regular in appearance. NFC font marks are arranged on the shirt pockets and are embroidered by reflective yarns, so that the shirt pockets are convenient to identify at night. After manufacturing is completed, key information of a wearer is pre-written into the NFC electronic tag by using professional equipment according to a general standard. The shirt integrates comfort, attractiveness and the emergency rescue function, and a new way is developed for the intelligent clothes to assist life safety guarantee.

The utility model discloses a low-radiation film which comprises a base film made of ETFE, a protective layer is arranged on the outer side of the base film, a dielectric layer and a radiation layer are arranged on the inner side of the base film, the number of the dielectric layer and the radiation layer is one, and the dielectric layer and the radiation layer are sequentially arranged in the direction away from the base film. The energy-saving heat-insulating and heat-reducing window can effectively block radiation heat exchange of infrared heat, achieves good heat-insulating and heat-reducing effects, relieves the problem of indoor overheating in summer, reduces energy consumption of a building, and is long in service life.

The invention provides a corrosion-resistant high-strength carbon fiber ETFE composite material and a preparation method thereof, and belongs to the field of engineering plastics. The carbon fiber ETFE composite material is prepared from the following raw materials in parts by weight: 100 parts of ETFE resin, 10 to 30 parts of aminated carbon fiber, 5 to 15 parts of maleic anhydride grafted polyolefin elastomer, 2 to 10 parts of PTFE (Polytetrafluoroethylene) micro powder, 1 to 5 parts of epoxy-terminated fluorine-containing siloxane oligomer, 0.5 to 5 parts of polyethyleneimine non-covalently modified boron nitride nanosheet, 3 to 10 parts of fluorine-containing anhydride-terminated polyimide oligomer and 0.5 to 2 parts of fluorinated polyolefin wax. 0.1 to 0.5 part of a fluorine-containing flatting agent and 0.5 to 2 parts of nano-scale fumed silica. According to the application, synchronous improvement of the mechanical property and the corrosion resistance of the composite material is realized through collaborative design of two dimensions of strengthening mechanical support and constructing an anti-corrosion barrier.

The invention relates to the technical field of composite pipes, in particular to a flexible composite pipe suitable for an ultra-deepwater oil and gas field and a preparation method thereof.The flexible composite pipe sequentially comprises an inner pressure bearing layer, an anti-corrosion isolation layer, a reinforcing layer and an outer protection layer from inside to outside, and the inner pressure bearing layer contains modified polyether-ether-ketone, short carbon fibers, nano-silicon dioxide and an antioxidant 1010; the anti-corrosion isolation layer contains an ethylene-tetrafluoroethylene copolymer, chlorinated polyether, nano aluminum nitride and an ultraviolet light absorber UV-531; the reinforcing layer contains aramid fibers, epoxy resin, a coupling agent KH-550 and a curing agent; the outer protective layer contains polyimide, polytetrafluoroethylene micro powder, nano silicon carbide and a weather-proof agent GW-540, and the pipe body has specific inner diameter and total wall thickness. The pressure-bearing performance, the corrosion resistance, the strength and the weather resistance are improved through compounding of all layers of materials, interlayer stripping is prevented through the bonding transition layer, the preparation process is optimized, the pipe body quality is guaranteed, batch production can be achieved, and the long-term service requirement of an ultra-deepwater oil and gas field is met.

The utility model relates to a photoelectric composite cable suitable for an unmanned aerial vehicle platform. The photoelectric composite cable comprises a wrapping layer formed by wrapping a covering film, an accommodating space is formed in the wrapping layer, a two-core electric unit and a one-core single-mode optical fiber are respectively placed in the accommodating space, and a plurality of aramid fiber filling cabling are distributed in the accommodating space; an insulating layer is distributed on the electric unit, an outer wrapping layer is distributed on the single-mode optical fiber, and the insulating layer, the outer wrapping layer and the covering film are all made of high-temperature-resistant fluoroplastic formed by ethylene-tetrafluoroethylene copolymer; the thickness of the covering film is 0.05 mm, and the total thickness after wrapping is 0.10 mm + / -0.02 mm; the outer diameter of the photoelectric composite cable is 2.2 mm + / -0.1 mm, and the total weight per meter is smaller than or equal to 12 g. Therefore, the whole photoelectric composite cable has better high temperature resistance, can meet high tensile strength under the condition of light weight, can realize low-loss signal transmission, and has better heat dissipation effect.

This invention, entitled "An Irradiation-Resistant and Low-Brittle ETFE Composite Film, Its Preparation Method and Application, and Flexible Solar Cell fins," belongs to the field of flexible solar cell materials technology. It provides an irradiation-resistant and low-brittle ETFE composite film, comprising an upper layer, an intermediate layer, and a lower layer. The upper and lower layers comprise ETFE resin and modified nano-cerium dioxide, with the modified nano-cerium dioxide accounting for 2%-8% of the total weight of the upper and lower layers. The intermediate layer comprises ETFE resin and an elastomer, with the elastomer accounting for 10%-30% of the total weight of the intermediate layer. This invention solves the problems of poor light transmittance, poor flexibility (brittle transition at low temperatures), inability to meet high light transmittance requirements, and poor interlayer bonding performance of existing ETFE composite films under strong radiation environments.

The application discloses ETFE super-weather-resistant radiation refrigeration aerogel thermal insulation building material and relates to the technical field of building materials.The building material is composed of a super-weather-resistant ETFE film layer, a radiation refrigeration coating layer, an aerogel non-woven fabric thermal insulation layer and a modified PET layer.The outermost super-weather-resistant ETFE film layer is located at the outermost layer of the composite material and serves as the matrix of the radiation refrigeration coating layer, so that the radiation refrigeration coating layer located below the super-weather-resistant ETFE film layer is prevented from being directly exposed to harsh environments.The radiation refrigeration coating layer radiates heat in the infrared range, and the aerogel thermal insulation layer effectively prolongs the heat conduction path.Furthermore, the modified PET layer is introduced as a bottom support layer below the aerogel layer.Compared with the comprehensive performance of a single material simply stacked, the application uses each layer in combination, in the structure, each functional layer plays its own characteristics while making up for the performance short board, and the application shows better comprehensive performance in weather resistance, cooling and thermal insulation synergistic effect and mechanical strength.

This invention discloses a multi-layered, highly conformable, flexible radiation shielding material, belonging to the field of radiation protection materials technology, aiming to solve the problems of poor flexibility and conformability and easy contamination in existing technologies. This radiation shielding material adopts a multi-layered composite synergistic laminated structure, comprising, from the outside to the inside, an outer layer, an intermediate shielding layer, a buffer transition layer, and an inner liner layer. The outer layer has a thickness of 0.1-0.3 mm and is made of a wear-resistant and aging-resistant flexible polymer material, which is one of modified polyurethane, polyetheretherketone, or ethylene-tetrafluoroethylene copolymer. The intermediate shielding layer is composed of at least two functional films with different mechanical properties and shielding components, alternately laminated to form a periodic laminated structure. The functional films include type A films and type B films; chemical cross-linking is achieved through the cross-linking agent glutaraldehyde. This invention has the advantages of being environmentally friendly and having good conformability.

The invention relates to a polypropylene material as well as a preparation method and application thereof. The polypropylene material comprises the following components in parts by weight: 65-90 parts of polypropylene, 4-12 parts of an ethylene-propylene copolymer, 4-15 parts of a filling material, 0.2-1 part of an ethylene-tetrafluoroethylene copolymer and 1-3 parts of amino modified polysiloxane. According to the polypropylene material provided by the invention, the ethylene-tetrafluoroethylene copolymer and the amino modified polysiloxane are introduced and are synergistically compounded with other components, so that the obtained polypropylene material has excellent scratch resistance.

The invention relates to the technical field of preparation of tetrafluoroethylene copolymer films, and provides a light conversion type ETFE film for photovoltaic packaging and a preparation method thereof, the ETFE film comprises the following raw materials by weight: 100 parts of an ethylene-tetrafluoroethylene copolymer; 0.1-1 part of a light conversion agent; the chemical general formula of the light conversion agent is A2BXO6: Ln < 3 + >, A is at least one of Ca < 2 + >, Sr < 2 + > and Ba < 2 + >, B is Zn < 2 + > or Mg < 2 + >, X is Ti < 2 + > or Si < 2 + >, and Ln < 3 + > is one or more of Sm < 3 + >, Tb < 3 + > and Eu < 3 + >; the weight part of the compatilizer is 20%-50% of the weight part of the light conversion agent, and the compatilizer is a phosphate ester surfactant or a siloxane compound containing perfluoroalkyl. Compared with the prior art, the ETFE film has the advantages that the use of auxiliaries such as a light stabilizer and an antioxidant can be avoided, the potential risk caused by the compatibility of various auxiliaries is avoided, the complexity and the cost of the formula are reduced, and the mechanical property and the photoelectric conversion property of the ETFE film are improved.

The invention provides a preparation method and application of an ETFE film with extremely low dielectric loss, and the preparation method comprises the following steps: introducing a low-dielectric filler into ETFE resin through melt blending to obtain a composite resin system; the melting temperature is controlled to be 220-240 DEG C, the rotating speed of a screw is controlled to be 30-50 rpm, the cooling rate is controlled to be 8-12 DEG C / s, the crystallinity of the film is controlled to be 30-40%, and the composite resin system is subjected to melt extrusion to form the film; carrying out gradient plasma surface modification and vacuum annealing treatment on the film in sequence; and finally, the ETFE film with extremely low dielectric loss is obtained. The dielectric loss factor of the ETFE film is less than or equal to 0.001. According to the ETFE film prepared by the method, the dielectric constant epsilon r is 2.0-2.2, the dielectric loss factor is less than or equal to 0.001, the tear strength is greater than or equal to 120mN, and the temperature resistance range is-200 DEG C to + 150 DEG C.

The invention discloses a connecting device for all-steel structure ETFE film material stretching and a construction method, and belongs to the technical field of all-steel structure building construction. Comprising a base unit, a frame unit, a membrane fixing unit, a supporting and guiding unit and a covering and fixing unit, the base unit is fixed to a main body structure, the frame unit is connected with the base unit, the two sides of the frame unit are wider than the base unit, the membrane fixing unit is used for fixing the edges of ETFE membranes on the two sides, and the supporting and guiding unit is provided with a drainage channel. And the covering and fixing unit presses and fixes the middle ETFE membrane material and forms a continuous drainage path with the drainage channel. Through the special connecting device and the standardized construction process, high-precision positioning and tensioning of a complex curved surface film structure are achieved, the problems that in traditional construction, precision control is difficult, the matching performance of a film material and a steel structure is poor, and waterproof performance and attractive appearance of nodes are difficult to consider are solved, and the construction efficiency and the structural safety and reliability are improved.