135 results about "Fluorocarbon coating" patented technology

The invention relates to the technical field of coatings, in particular to a modified FEVE fluorocarbon resin coating and a preparation method thereof. The problem that the FEVE fluorocarbon coating is poor in durability is solved. The preparation method comprises the following steps: modifying FEVE fluorocarbon resin with linoleic acid to obtain a granular material; stirring the modified FEVE fluorocarbon resin, polyisocyanate, montmorillonite and a composite solvent to obtain a prepolymer; pre-dispersing and grinding silicon carbide, modified zinc oxide, a dispersing agent and a composite solvent, adding nano composite particles for ultrasonic dispersion, and adding a prepolymer and a flatting agent to obtain the modified FEVE fluorocarbon resin coating. Wherein the FEVE fluorocarbon resin is modified, so that the crosslinking speed, the coating strength and the adhesive force are improved, the stain resistance, the weather resistance and the corrosion resistance are improved through the nano composite particles and the like, and finally the durability of the FEVE fluorocarbon resin coating is improved.

The invention discloses a nano two-dimensional sheet modified flexible wear-resistant fluorocarbon coating as well as preparation and application thereof. The nano two-dimensional sheet modified flexible wear-resistant fluorocarbon coating comprises paint and an isocyanate curing agent in a mass ratio of (7-10): 1, the paint vehicle comprises the following components in parts by mass: 15-25 parts of an organic solvent, 30-40 parts of fluorocarbon resin, 5-10 parts of castor oil polyol, 1-3 parts of a dispersing agent, 0.5-1 part of a defoaming agent, 20-30 parts of titanium dioxide, 10-20 parts of barium sulfate, 0.1-1 part of a nano two-dimensional sheet, 0.5-2 parts of a thickening agent and 0.1-1 part of a flatting agent; according to the invention, after the castor oil polyol is added into the fluorocarbon resin for mixing and dissolving, in the curing process, hydroxyl of the castor oil polyol can be cured with isocyanate to form a film, and a polyurethane-fluorocarbon interpenetrating polymer network is formed, so that the flexibility of the fluorocarbon coating is improved; meanwhile, the flexibility and wear resistance of a coating film can be improved by adding the nano two-dimensional sheet into the paint vehicle, and the nano two-dimensional sheet modified flexible wear-resistant fluorocarbon coating disclosed by the invention is good in wear resistance and flexibility.

The invention relates to the technical field of coatings, in particular to a low-temperature curing type fluorocarbon coating for an aluminum alloy and a preparation method of the low-temperature curing type fluorocarbon coating. The preparation method comprises the following steps: adding eugenol, potassium carbonate and decafluorobiphenyl to obtain modified biphenyl; and adding m-chloroperoxybenzoic acid to prepare the reinforcing agent. And performing surface modification on the linear silicon dioxide filler, the flaky silicon dioxide filler and the dendritic silicon dioxide filler by using gamma-epoxypropoxy propyl trimethoxy silane to obtain the epoxy modified wear-resistant filler. The preparation method comprises the following steps: adding epoxy resin and the epoxy modified wear-resistant filler into xylene, ultrasonically stirring, adding fluorocarbon resin, a reinforcing agent and a curing agent, and continuously ultrasonically stirring to obtain the fluorocarbon coating. The fluorocarbon coating prepared by the invention has good adhesion performance, wear resistance and mechanical strength, so that the fluorocarbon coating has a wide application prospect in the technical field of coatings.

The invention belongs to the technical field of composite materials and radomes, and particularly relates to a layer structure of a radome body and a manufacturing method. The skin comprises a first skin layer, an interlayer, a second skin layer and a polyvinyl fluoride film layer which are sequentially arranged from top to bottom. Through collaborative design of a micro-nano composite structure and a low-surface-energy material, a self-cleaning surface skin layer with super-hydrophobicity, high wave transmission and weather resistance is constructed. Compared with a traditional fluorocarbon coating, the wave transmission rate is 60-70% and is improved by more than 25%, the signal transmission loss is remarkably reduced, and the harsh requirement for the wave transmission performance of the antenna housing is met. The cleaning cost of a traditional antenna housing can be saved by more than 80%, especially for high-altitude and complex-structure antenna housings, high-altitude operation or special equipment is not needed, and the maintenance safety risk is reduced. The replacement frequency of the radome caused by aging and abrasion of the coating can be reduced, and the overall life cycle cost of equipment is reduced.

The invention relates to the technical field of coatings, in particular to a stone-like fluorocarbon coating and a preparation method thereof. The stone-like fluorocarbon coating is prepared from the following components in parts by mass: 35 to 50 parts of fluorocarbon resin, 10 to 20 parts of nepheline powder, 5 to 15 parts of potassium aluminum silicate, 3 to 8 parts of rutile titanium dioxide, 1 to 5 parts of inorganic color paste, 0.5 to 2 parts of silane coupling agent, 0.3 to 1.5 parts of polyamide wax anti-settling agent, 0.5 to 2 parts of fumed silica, 0.1 to 0.8 part of organic silicon flatting agent and 0.2 to 1 part of modified hydrogenated castor oil. 5-12 parts of an aliphatic isocyanate curing agent and 10-20 parts of a mixed solvent. The stone-like fluorocarbon coating is excellent in weather resistance, can effectively resist the influence of environmental factors such as ultraviolet rays, acid rain and temperature change, remarkably reduces the probability of occurrence of phenomena such as color fading, pulverization and peeling, prolongs the service life of the coating, and ensures a long-term stable decorative effect.

The invention discloses a preparation method of a positive friction layer of a nano generator. Comprising the following steps: pouring a fluorocarbon coating into three-dimensional layered porous graphene and a fluorocarbon diluent to prepare a mixed solution with different graphene mass fractions, carrying out magnetic stirring and ultrasonic treatment on the mixed solution, then pouring the mixed solution into a planetary ball milling tank for grinding, adding a fluorocarbon curing agent, and carrying out magnetic stirring and ultrasonic treatment on the treated mixed solution again, and finally performing vacuum drying to obtain a composite material, preparing a positive friction layer, and coating the composite material. The positive friction layer adopts a 3D HPG-FEVE composite material as the friction layer, in the aspect of electrical properties, due to steric hindrance formed by fluorocarbon molecules among graphene, dielectric loss is reduced, and the electrical output performance is improved; due to the fact that a composite material prepared from 3D HPG and FEVE has a layered lubricating effect on the wear resistance, the interlayer interaction is weak, the chemical stability is good, a continuous chemical protection film can be formed in the friction process, and the tribological performance of the positive friction layer is excellent.

An electrode is inserted into the interior of an aluminium canister 16 placed withing a chamber. Oxygen plasma is used clean the inside of the Al can 16. A fluorocarbon polymer layer is then deposited

The invention belongs to the technical field of fluorocarbon aluminum veneers, and particularly relates to a corrosion-resistant fluorocarbon baking varnish aluminum veneer and a preparation method thereof. The corrosion-resistant fluorocarbon stoving varnish aluminum veneer comprises the aluminum veneer layer and the fluorocarbon coating, the aluminum veneer is subjected to cleaning pretreatment, the aluminum veneer is subjected to alkali corrosion and acid pickling, then chromizing treatment is conducted, primer and finish paint are sprayed, baking and curing are conducted, and the fluorocarbon stoving varnish aluminum veneer is obtained; the service life of the coating is prolonged; a hydrophobic graphene oxide sheet in the hydrophobic wear-resistant filler contains a fluorine group and has excellent compatibility with the fluorocarbon coating, so that the wear resistance and hydrophobic property of the fluorocarbon coating are improved; the dipolyethylene glycol monomethyl amyl ether modified silane is grafted into the toughened resin, so that the adsorbability, toughness and impact resistance of the fluorocarbon coating and metal can be improved; the fluorocarbon baking varnish aluminum veneer prepared by the invention has excellent corrosion resistance, impact resistance and wear resistance.

The utility model discloses an anti-vibration and anti-icing all-nonmetal 8-shaped optical cable, belongs to the technical field of optical cables, aims to provide an anti-vibration and anti-icing all-nonmetal 8-shaped optical cable, and solves the problems that the existing optical cable is poor in anti-vibration performance and cannot prevent icing. The optical cable comprises a polyolefin protective layer, the polyolefin protective layer comprises a suspension wire part on the upper side, an optical cable part on the lower side and a suspension belt part connecting the suspension wire part and the optical cable part, a solid G-FRP round rod is arranged in the suspension wire part, a layer-stranded cable core is arranged in the optical cable part, a foam foaming layer is arranged on the inner side of the optical cable part, and the foam foaming layer is arranged on the outer side of the suspension wire part. And a hydrophobic layer is arranged outside the polyolefin protective layer. The hydrophobic layer is one of a polyvinylidene fluoride sheath, a polypropylene sheath and a polytetrafluoroethylene sheath. And the hydrophobic layer is a fluorocarbon coating. The polyolefin protective layer is a polyolefin protective sleeve. The utility model is suitable for the anti-vibration and anti-icing all-nonmetal 8-shaped optical cable.

The utility model provides a seamless splicing type aluminum ceiling moistureproof structure which comprises a ceiling body, the ceiling body comprises a substrate layer, a first functional layer and a second functional layer, the first functional layer comprises an epoxy resin coating and a polyurethane coating, the second functional layer comprises a fluorocarbon coating and a nanometer waterproof coating, and the nanometer waterproof coating is a polyurethane coating. By arranging the first functional layer comprising the epoxy resin coating and the polyurethane coating, the epoxy resin coating has excellent waterproof and moisture-proof performance, can effectively prevent water from permeating, further has good adhesive force and chemical corrosion resistance, and can protect the surface of the aluminum material from being damaged by oxidation and chemical corrosion; the epoxy resin coating is smooth in surface and easy to clean and maintain, and the polyurethane coating has excellent moisture-proof and waterproof performance, has elasticity and wear resistance, can adapt to thermal expansion and cold contraction changes of the aluminum ceiling body and is not prone to cracking and falling off.

The invention belongs to the technical field of polyester resin preparation, and provides polyester resin for a photovoltaic backboard fluorocarbon coating as well as a preparation method and application of the polyester resin. The preparation method comprises the following steps: preparing and melting the quantitative component A and component B; the component A comprises quantitative 1, 2-cyclohexanedicarboxylic acid or anhydride thereof and other acids or anhydrides (at least one of maleic acid, maleic anhydride, succinic acid, fumaric acid and fumaric anhydride); the component B comprises quantitative 1, 6-hexanediol and other alcohols (which comprise quantitative neopentyl glycol and 2-ethyl-2-(hydroxymethyl)-1, 3-propanediol), and the component B comprises quantitative 1, 6-hexanediol and other alcohols (which comprise quantitative neopentyl glycol and 2-ethyl-2-(hydroxymethyl)-1, 3-propanediol); adding a catalyst, heating, and carrying out esterification reaction; and reducing the pressure, raising the temperature and carrying out polycondensation reaction to obtain the polyester resin. The polyester resin is added into the fluorocarbon coating for the photovoltaic back plate, so that the fluorocarbon coating has better anti-aging adhesion performance, anti-aging peel strength, anti-aging yellowing performance, acid and alkali resistance and solvent resistance.

This invention relates to the field of coating technology, specifically to a low-temperature curing fluorocarbon coating for aluminum alloys and its preparation method. The invention involves adding eugenol, potassium carbonate, and decafluorobiphenyl to obtain modified biphenyl; then adding m-chloroperoxybenzoic acid to prepare a reinforcing agent. Next, γ-epoxypropoxypropyltrimethoxysilane is used to surface modify linear silica fillers, lamellar silica fillers, and dendritic silica fillers to obtain epoxy-modified wear-resistant fillers. Epoxy resin and epoxy-modified wear-resistant fillers are added to xylene, ultrasonically stirred, and then fluorocarbon resin, reinforcing agent, and curing agent are added, followed by continued ultrasonic stirring to obtain the fluorocarbon coating. The fluorocarbon coating prepared by this invention exhibits excellent adhesion, wear resistance, and mechanical strength, thus showing broad application prospects in the field of coating technology.

The invention discloses a high-heat-dissipation corrosion-resistant PCB label, and relates to the technical field of PCB labels, the high-heat-dissipation corrosion-resistant PCB label comprises a polyimide film, the lower end of the polyimide film is provided with heat-conducting silicone grease, the upper end of the polyimide film is provided with a conductive adhesive, the upper end of the conductive adhesive is provided with a printing layer, and the upper end of the printing layer is coated with a fluorocarbon coating. Heat dissipation aluminum sheets are attached to the left end and the right end of the polyimide film. According to the invention, the polyimide film, the heat-conducting silicone grease, the conductive adhesive and the heat dissipation aluminum sheet are arranged, and the heat-conducting silicone grease can be used for filling a gap between the PCB tag and a heat dissipation device through multiple different materials, so that the heat conduction efficiency is improved, heat can be more effectively transferred to the heat dissipation device from the PCB tag, and the heat dissipation efficiency is improved. The conductive adhesive can be used for connecting circuit elements and lines and has good conductivity, cohesiveness and corrosion resistance, the heat dissipation area is increased through the heat dissipation aluminum sheet, heat dissipation is accelerated, and the heat dissipation effect of the PCB tag is improved.

The invention discloses an ultrathin flexible ceramic plate as well as a preparation method and application thereof. The ultrathin flexible ceramic plate is prepared from the following raw materials: cordierite powder, PAN (Polyacrylonitrile) fiber, polysiloxane, nano Al2O3, aluminum dihydrogen phosphate sol and a fluorocarbon resin composite coating. The preparation method comprises the following steps: 1) pretreatment; 2) freezing and casting; 3) heat treatment and carbonization; 4) fluorocarbon coating process and hot isostatic pressing; the preparation method comprises the following steps: firstly, carrying out freeze casting to obtain a ceramic plate matrix, and carrying out hot pressed sintering on the ceramic plate matrix to carbonize PAN fibers into carbon fibers to obtain high-strength single-layer ceramic sheets and composite ceramic sheets, so as to obtain the flexible ceramic plate. The obtained ultra-thin flexible ceramic plate is high in strength and toughness, resistant to high temperature and good in sound insulation and heat insulation effect, through precise configuration and chemical coupling of the components, the problem that a ceramic material is crisp if being strong and weak if being thin is solved, and a new scheme is provided for industrialization of flexible ceramics.

This invention belongs to the field of resin synthesis technology and discloses a phase change energy storage and thermal insulation fluorocarbon coating and its preparation method. The coating comprises 23-25% PVDF fluorocarbon resin, 8-9% acrylic resin, 10-20% phase change material, and a specific composite solvent system. Through a stepwise dispersion process, the inorganic filler is first ground to ≤15μm, and then the phase change material is slowly dispersed under controlled temperature conditions, solving the technical problems of easy breakage and unstable dispersion of phase change material in solvent-based systems. This invention innovatively combines the thermal management capabilities of phase change material with the extreme durability of solvent-based fluorocarbon resin, and with optimized formulation and refined dispersion process, achieves excellent and long-lasting dynamic thermal insulation performance, providing a high-performance coating solution for building energy conservation and emission reduction. By maintaining the integrity of the PCM microcapsule structure in the solvent-based system, the coating is endowed with dynamic temperature buffering capability, matching the phase change functional lifespan with the weather resistance lifespan of the fluorocarbon resin.

The invention discloses a flexible modified water-based fluorocarbon concrete protective coating and a preparation method thereof, and belongs to the field of coatings. Water-based fluorocarbon resin main film-forming matter resin containing 20% of active hydroxyl is selected, the flexibility of a coating is provided by adding a self-made SiO2 modified flexible chain segment-containing prepolymer, and the flexibility of the resin is enhanced by introducing flexible chain segments such as polyester polyol and the like into the flexible prepolymer; meanwhile, the SiO2 inorganic part is introduced, so that the strength of the coating can be enhanced, the antifouling performance of the surface of the fluorocarbon coating is further enhanced, and meanwhile, the ultraviolet aging resistance of the coating is further improved by adding the inorganic nano ultraviolet light absorber into the polymer. A water-dispersed isocyanate curing agent is selected as a curing agent to realize further cross-linking and film forming of the space of the coating, and finally, the flexible modified water-based fluorocarbon concrete protective coating with super weather resistance, dirt resistance and high elongation at break is prepared and can provide more durable anti-corrosion protection for the surface of concrete.

The utility model provides a corrosion-resistant aluminum-plastic composite belt, which comprises an aluminum composite belt body, the aluminum composite belt body comprises a substrate layer, a first functional layer and a second functional layer, the first functional layer comprises an epoxy resin coating layer and a polyurethane coating layer, the second functional layer comprises a fluorocarbon coating layer and a polyvinylidene fluoride coating layer, and the first functional layer and the second functional layer are arranged on the substrate layer. The first functional layer comprising the epoxy resin coating layer and the polyurethane coating layer is arranged, the epoxy resin coating layer has good tolerance to various chemical substances (such as acid, alkali and solvent), the aluminum-plastic composite belt can be effectively prevented from being eroded by the chemical substances in a corrosive environment, meanwhile, the aluminum-plastic composite belt has excellent mechanical strength and adhesive force, the service life of the aluminum-plastic composite belt is prolonged, and the service life of the aluminum-plastic composite belt is prolonged. The polyurethane coating layer can form a firm protective layer on the surface of the aluminum-plastic composite belt, is excellent in waterproof performance, can effectively isolate moisture and prevent the aluminum-plastic composite belt from being corroded in a humid environment, and has excellent wear resistance.

The utility model relates to the technical field of waterproof labels, and discloses a waterproof label which comprises release paper and a label structure arranged at the upper end of the release paper, a protection structure is further arranged on the surface of the label structure, when the label structure is used, a user can hold extension paper by hand to tear off the release paper from the label structure, and the protection structure is arranged on the surface of the label structure. The release paper and the label structure are separated, then the adhesive layer can be adhered to an object for use, and at the moment, the label body can be higher than the object through the sealing strip, so that water is not accumulated on the label body; the ceramic powder coating, the epoxy coating and the fluorocarbon coating can play a role in wear resistance, chemical resistance and oxidation resistance, damage of liquid to the label body is reduced, the durability of the label body can be effectively improved, the bottom of the tearing strip is not flush with the bottom of the sealing strip, a user can hold the tearing strip by hand and then pull the tearing strip with force, and the tearing strip is convenient to use. And the sealing strip can be torn off from the object.

The invention discloses a composite heat preservation building outer wall and a construction method thereof. The composite heat preservation building outer wall is composed of a base layer wall body, a heat preservation layer, a leveling layer, a waterproof breathable layer and a decoration layer. The thermal insulation layer is formed by compounding a polystyrene foam board (EPS / XPS) and a rock wool board or a glass wool board, so that the thermal insulation performance is improved; the leveling layer adopts polymer cement mortar or gypsum mortar to ensure that the surface of the outer wall is smooth; the waterproof breathable layer adopts a polyethylene (PE) or polypropylene (PP) film with a microporous structure, so that rainwater leakage is prevented, and the breathability of the wall body is ensured; the decorative layer is made of materials such as high-weather-resistance fluorocarbon coating or ceramic tiles, so that the attractiveness and durability are improved; the construction method comprises the steps of base layer wall body treatment, heat preservation layer pasting and reinforcing, leveling layer smearing, waterproof breathable layer laying, decoration layer construction and the like. The application effect in high-rise building and residential building projects is good, the thermal insulation performance, the waterproof and breathable performance and the decoration effect of the building are improved, meanwhile, the construction cost is reduced, and the construction period is shortened.

The invention relates to the technical field of luminescent coatings, in particular to modified isocyanate resin containing aggregation-induced emission groups as well as a preparation method and application of the modified isocyanate resin. According to the preparation method, tromethamine is adopted to introduce tetraphenyl ethylene-isothiocyanate containing an aggregation-induced emission group into 4, 4 '-dicyclohexylmethane diisocyanate, so that the modified isocyanate resin is obtained. Luminescent paint can be obtained by using the modified isocyanate resin as a curing agent. The fluorocarbon coating prepared by taking the modified isocyanate resin as a curing agent and matching the modified isocyanate resin with fluorocarbon resin has the advantages of luminescence property, excellent weather resistance and excellent stain resistance.

The utility model discloses a kind of high-stability corrosion-resistant single-point mooring ultra-thin wall bearing devices, including outer ring body, reinforcing support plate inner wall middle position is equipped with oil filler, and reinforcing support plate inside upper and lower edge is equipped with splicing slot, splicing slot inner wall is inserted and is installed with mounting block, and mounting block one side is rotatably embedded and installed with sliding bead, mounting block and reinforcing support plate one side are inserted and installed with first fixed bolt.This kind of high-stability corrosion-resistant single-point mooring ultra-thin wall bearing device can be side supported by reinforcing support plate, and can be stably rotated by sliding bead, mounting block, and the effect is good, and high-efficiency corrosion-resistant treatment can be carried out by the zirconia ceramic ball material quality of ball and the double-layer structure of nano ceramic coating and organic fluorocarbon coating coating, can adapt to complex marine environment, and high-efficiency heat dissipation can be carried out while being fixed by bolt seat, heat-conducting block and second fixed bolt, and the effect is good.

The utility model relates to the technical field of mixer blade, especially to an explosion -proof submersible mixer blade, including the mounting bush, the mounting bush is the cylinder structure, the surface of mounting bush is equipped with a plurality of mounting holes for connecting with motor shaft, the mounting hole is along the both ends of mounting bush symmetry distribution setting, a plurality of blades are fixedly arranged on the outer wall of mounting bush, the end of blade is provided with curved end head. This scheme provides high -strength support through stainless steel base layer, polyurethane buffer layer absorbs fluid impact vibration, aluminium alloy reinforcing framework promotes compression resistance and torsion resistance, carbon fiber surface layer ensures form stability, fluorocarbon coating enhances corrosion resistance, the synergistic effect of the multiple materials makes the blade effectively resist deformation, fracture and corrosion in high -speed rotation or high resistance fluid environment, greatly prolongs the service life, the spiral head and the positioning block structure set up on the blade surface can form complex turbulence in the stirring process, and the fluid mixing effect is significantly improved.

The utility model discloses a novel bailey truss which comprises a main frame body, a reinforcing rod is fixedly connected to the middle position in the main frame body, second inserting blocks are fixedly connected to the two ends of one side of the main frame body, and reinforcing strips are fixedly connected to the two ends of the side, away from the second inserting blocks, of the main frame body. Second inserting grooves are formed in the two sides of one side of the reinforcing strip. The strength layer, the composite layer and the protective layer are arranged in the bailey truss, the strength layer has excellent tensile strength and compression resistance and is suitable for various complex terrains or bearing external impact, the composite layer is arranged outside the strength layer, the weight of the bailey truss is further reduced, meanwhile, larger bearing capacity is provided, and the service life of the bailey truss is prolonged. Meanwhile, the protective layer is arranged outside the composite layer and has very high corrosion resistance, and the external fluorocarbon coating has very high high-temperature resistance, ultraviolet resistance and chemical corrosion resistance, so that the overall strength of the bailey truss is improved, and the use stability of the bailey truss is improved.

The utility model provides a kind of marine corrosion-resistant anti-vibration intelligent high-low voltage switch cabinet, including shell, the shell includes front plate, back plate, left side plate, right side plate, top plate and bottom plate, between left side plate and right side plate still be equipped with baffle, the baffle will switch cabinet inside be divided into two areas of front and back, multiple wire slots are equipped on the front and back of baffle, wire slot is evenly equidistant and is transversely parallel arrangement, shock-absorbing support is equipped between wire slot, electric appliance module is installed on shock-absorbing support;By corrosion-proof design in switch cabinet shell, shell is made of 316L stainless steel, and is coated with fluorocarbon coating etc., can effectively resist the corrosion of marine environment, prolong the service life of switch cabinet, reduce maintenance cost, and inside by setting shock-absorbing support, anti-vibration rib and reinforcing rib etc. Structure, can effectively buffer and absorb vibration energy, reduce the influence of vibration on electric element, protect the normal work of electric element, improve the reliability of switch cabinet.

The invention provides a device and a method for preparing a high-weather-resistance fluorocarbon coating through VDF soap-free emulsion polymerization. The device comprises a reaction kettle, a deionized water metering tank, a monomer storage tank, an initiator storage tank, a constant-pressure funnel and a coating preparation unit. The method comprises the following steps: preparing a resin emulsion by adopting a double-bond emulsifier dodecafluoroheptyl methacrylate and a silane coupling agent KH-550 through a soap-free emulsion polymerization process, and then adding an auxiliary agent to prepare the coating. The obtained coating is environment-friendly and free of PFOA, and the color difference is delta Elt after QUV aging is conducted for 2500 h; the hardness is greater than or equal to 2H, and the weather resistance is improved by 67% or above.

The invention relates to the technical field of navigation station escalator structures, in particular to a navigation station escalator mounting structure which comprises a truss, a bottom plate and side plates. A mechanical locking system of the snap fastener and the L-shaped connecting plate replaces traditional welding, lossless disassembly and assembly are achieved, and the hidden danger of open fire is eliminated; the cellular board and the galvanized square tube are cooperatively stressed, dependence on civil engineering precision is reduced, welding or pouring is not needed in construction through a modular fast-assembly system, a snap fastener structure supports fast overhaul, downtime is greatly shortened, the composite design of the galvanized square tube and the cellular board is combined with a fluorocarbon coating, the weight is reduced, and meanwhile the service life is prolonged. The adjusting assembly drives the screw rod to transmit through the rotary connecting shaft, stable supporting force is formed, and the installation flexibility is improved; the locking assembly achieves angle rapid locking through spring resilience, the adjusting stability is ensured by being matched with guide groove limiting, the requirements of trusses with different angles are met, the structure is safe, efficient, durable and adjustable, and the escalator installation and maintenance efficiency is remarkably improved.

The invention provides a fluorine-free high-weather-resistant coating composition for a high-barrier aluminum-containing photovoltaic back plate. The coating composition is composed of a main agent and a curing agent, wherein the main agent does not contain fluorine and comprises matrix resin, pigment, inorganic filler, an auxiliary agent and an anhydrous diluent; wherein the matrix resin comprises organic silicon modified acrylic resin, polyester resin, polyvinyl alcohol resin copolymer and epoxy resin. By introducing the specially designed organic silicon modified acrylic resin, the adhesive force and weather resistance of the coating composition to an aluminum foil and a polyester base film are improved, and the water vapor transmittance is reduced; the polyester resin with a high hydroxyl value is introduced, so that the overall flexibility of the coating is improved, the brittleness is reduced, and meanwhile, the adhesion to a substrate and the weather resistance are further improved; meanwhile, the polyvinyl alcohol resin copolymer is also introduced, so that the water vapor transmittance is further reduced. The coating composition disclosed by the invention does not contain fluorine elements, so that the environmental protection problem caused by an existing backboard fluorocarbon coating system is solved.

The utility model relates to the technical field of dredging devices, and provides a paint sand mill feed pipe dredging device which comprises a shell and a driving motor, the driving motor is installed on the surface of the shell, a dredging and scattering assembly is arranged in the shell, a rotating seat is rotationally connected to the top in the shell, and an outer gear is arranged on the outer surface of the rotating seat. A driving gear is arranged at the output end of the driving motor and engaged with the outer gear. By means of the technical scheme, the problems that in the prior art, when raw materials are fed into an existing fluorocarbon coating sand mill, the feeding pipe is often blocked, the feeding pipe is generally difficult to dredge due to the fact that the feeding pipe is narrow, the running state of the fluorocarbon coating sand mill is poor, the production efficiency is reduced, and the production cost is lowered are solved. And the labor intensity of workers is increased.

The utility model provides a kind of lightweight high-strength honeycomb core aluminum plate, belong to metal sheet field, including aluminum plate base body, the surface of aluminum plate base body is provided with the composite mechanism for improving the strength of aluminum plate base body. 3 , 8-10% lower than traditional aluminum alloy, tensile strength reaches 550-600MPa, yield strength is greater than or equal to 500MPa, meets the structural load demand, aramid paper honeycomb density is only 40-80kg / m 3 , aramid honeycomb shear strength is greater than or equal to 3MPa, effectively resist transverse load, by crushing deformation absorption impact energy, modified epoxy resin adhesive film T type peel strength is greater than or equal to 15N / cm, ensure that honeycomb core and panel long-term combination, set up carbon fiber reinforced polymer, make overall bending modulus increase 40-60%, tensile strength reaches 1500MPa, panel layer uses 7075-T6 aluminum alloy, surface hardness reaches 150HB, scratch resistance is superior to ordinary aluminum plate, polyvinylidene fluoride fluorocarbon coating QUV accelerated aging 5000h after light retention rate is greater than or equal to 85%, applicable to outdoor scene.

The present invention discloses a method for predicting the performance of nano-cerium dioxide ultraviolet shielding coatings based on machine learning optimization. This method uses experimental means to prepare and test the performance of the cerium dioxide ultraviolet shielding coating to obtain data, selects key characteristic parameters from the data, and constructs a database linking the key characteristic parameters with the performance of the ultraviolet shielding coating. A machine learning method is then used to construct a machine learning model, which is trained using the data in the database, and the optimal model is selected. During application, the cumulative particle size distribution of the nano-cerium dioxide that constitutes the coating to be tested, the surface modifier, the organic solvent, the type of fluorocarbon coating, the ratio of fluorocarbon coating to nano-cerium dioxide, and the light transmittance of the cerium dioxide dispersion are input into the selected model. This method can predict the ultraviolet shielding performance and visible light transmittance of the applied ultraviolet shielding coating. This eliminates the need for extensive screening experiments, saving time and economic costs.