110 results about "Polyvinyl fluoride" patented technology

An integrated structure pickleball paddle and a preparation process thereof are provided, where the pickleball paddle includes a paddle body, an edge banding, and a handle, where the edge banding and the paddle body are fused into an integrated structure by hot pressing, where the material of the edge banding is a modified TPU composite material, where the modified TPU composite material includes the following raw materials in parts by mass: 90-100 parts of modified TPU, 9-14 parts of polyvinyl fluoride, 20-30 parts of epoxy resin, 10-20 parts of ABS resin, 5-10 parts of modified nano-silicon dioxide, 0.3-0.6 parts of antioxidant, 0.2-0.5 parts of fluidity aid, 4-9 parts of 4,4′-methylene-bis(2-chloroaniline), and 3-7 parts of silicone oil. The edge banding and the paddle body are hot pressed and fused into an integrated structure, the edge banding will not fall off, and the comprehensive performance of the edge banding is better.

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.

A polytetrafluoroethylene (PTFE) membrane with a gradient pore structure and a method for preparing the same are disclosed. A cross-section of the PTFE membrane has the gradient pore structure, and a first porous outer surface and a second porous outer surface of the PTFE membrane have fibers and nodes with different microstructures. The first porous outer surface has an island-like microstructure formed by a plurality of interconnected relatively-small nodes, and the second porous outer surface has an H-shaped ladder-like microstructure formed by a plurality of interconnected relatively-large nodes. The PTFE membrane produced by this method features low resistance and high flow rate while maintaining thickness and filtration precision. The improvement in filtration efficiency enhances the capture of contaminants. For a given transmembrane pressure drop, the high permeability or high flow capacity of the membrane reduces resistance loss, shortens filtration time, and thus reduces energy costs.

The invention relates to a PERT floor heating pipe material and a preparation method thereof, and belongs to the technical field of floor heating pipe preparation. The PERT floor heating pipe material comprises an inner wall and an outer wall, wherein the inner wall is prepared from the following raw materials in parts by weight: 100-200 parts of high-density polyethylene, 20-40 parts of polyamide, 15-18 parts of a carbon-series heat conduction material and 6-8 parts of an antioxidant; the outer wall is prepared from the following raw materials in parts by weight: 100-150 parts of metallocene polyethylene, 30-35 parts of organic silicone powder, 10-13 parts of an antibacterial agent and 8-9 parts of a fluorine-containing polymer; the fluorine-containing polymer is at least one of polyvinylidene fluoride and polyvinyl fluoride. The PERT floor heating pipe material prepared by the invention is high in heat conductivity coefficient, low in inner wall dynamic friction factor, excellent in mechanical property, good in high-temperature hydraulic performance, capable of preventing an inner wall structure and breeding bacteria, long in service life and very high in application value.

A roofing and / or siding material having a resulting reflectivity of at least about 50%. The roofing and / or siding material includes a modified bitumen sheet / membrane, a fiber reinforcement layer and a reflective polymer layer material. The reflective polymer layer material includes polyvinyl fluoride.

The invention discloses a super-smooth anticorrosive coating for an overhead transmission conductor and a preparation method and application thereof.The super-smooth anticorrosive coating for the overhead transmission conductor is prepared from, by mass, 25-50 parts of polyvinyl fluoride resin, 12-50 parts of epoxy resin, 5-10 parts of butyl acetate, 5-10 parts of graphite fluoride, 5-8 parts of molybdenum disulfide, 5-20 parts of superfine aluminum oxide and 6-25 parts of zinc powder. And 1-12.5 parts of zinc phosphate. Surface modification and dynamic coating are carried out on the super-smooth filler particles, so that a layer of chemical inert film is formed on the surface of the filler, and the friction force between the particles and between the particles and a matrix is reduced. Meanwhile, a multi-stage dispersion technology is adopted, low-speed stirring is firstly carried out for primary mixing, and then gradual speed increasing is combined with ultrasonic treatment, so that aggregates of the filler can be fully destroyed, and a stable dispersion state is formed. The treatment can form a highly uniform super-lubricity network structure, improve the interface bonding between the filler and the matrix resin, reduce micropores in the coating and reduce the friction coefficient of the coating, so that the coating shows super-lubricity. And through ultrasonic oscillation treatment, preservative particles reach the nanoscale, the surface area and chemical activity of the particles are increased, the particles and matrix resin form more stable combination, and the anticorrosive effect of the coating is effectively improved.

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 invention provides an adhesive sheet that has excellent strength of adhesion to a fluororesin such as polytetrafluoroethylene even without a pretreatment on the fluororesin and has excellent workability for lamination. In addition, the purpose of the present invention is to provide: a laminated sheet obtained using the adhesive sheet; and a method for manufacturing a chemical liquid tank using the adhesive sheet. The present invention pertains to an adhesive sheet having an adhesive layer (Y1) on one surface and an adhesive layer (Y2) on the other surface, the adhesive sheet having at least one configuration selected from the group consisting of the following first configuration and second configuration. First configuration: The adhesive layer (Y1) contains a base polymer (P1) and a tackifier resin, the base polymer (P1) includes at least one selected from the group consisting of a (meth)acrylic copolymer, a styrene-based elastomer, and a silicone resin, and the adhesive layer (Y2) is a hot-melt adhesive layer. The second configuration: The adhesive layer (Y1) has a 180° peel strength of 5.0 N / 25 mm or more with respect to polytetrafluoroethylene at 23°C, and the adhesive layer (Y2) has a probe tack value of 20 N / 5 mmφ or less as measured under the conditions of 23°C, a pressurizing force of 98 gf, a pressurizing speed of 100 mm / sec, a pressurizing time of 10 seconds, and a peeling-off speed of 5 mm / sec.

The present disclosure relates to a coating composition comprising polyvinyl fluoride (PVF), an acrylic copolymer comprising amine and / or hydroxyl functional groups, and an isocyanate or melamine crosslinker with groups that are reactive towards amine or hydroxyl groups. Also disclosed herein are dried or cured coatings resulting from the coating composition, substrates coated with such coating compositions, the resulting dried and / or cured coated substrates, and methods of coating such substrates.

The utility model discloses a corrosion-resistant grease-resistant light blister blister, and particularly relates to the technical field of blister blisters, a base layer is made of polystyrene materials and is light and economical, a grease-resistant layer comprises polyvinyl fluoride, polyurethane and fluorinated polymer, polyvinyl fluoride provides good grease resistance, polyurethane provides flexibility and buffering protection, and the fluorinated polymer is made of fluorinated polymer. The fluorinated polymer provides very high chemical stability and a smooth surface, and the corrosion resistant layer includes an epoxy resin, an acrylic coating, and a polyamide coating. The epoxy resin provides good adhesive force and chemical resistance, the acrylic coating enhances weather resistance and flexibility, the polyamide coating provides wear resistance and water resistance, the overall service life is prolonged, transportation cost and operation difficulty are reduced due to the light weight, grease resistance and corrosion resistance provide multiple protection, and the quality and safety of products in the package are ensured. The whole structure has good stability and performance, materials of multiple layers are complementary, the comprehensive performance of the blister is jointly improved, and different packaging requirements are met.

A porous membrane laminate according to one aspect of the present disclosure has one or more porous membranes containing polytetrafluoroethylene as a main component, wherein the porous membrane laminate satisfies a following formula (1):P / γ>-31.6×ln⁢Ra+168(1)wherein P is an average bubble point [kPa]; γ is a surface tension [dyn / cm] of a test liquid used in measurement of the average bubble point; and Ra is a surface roughness [nm] of the porous membrane, and 14 nm≤Ra≤96 nm.

A composite material sheet (12), which is a constituent of an electrode (10) that is an example of the embodiment of the present invention, contains an active material (21) and a fibrous binder (22). With respect to the binder (22), a polytetrafluoroethylene is contained as a main component; and in a solid state 19F-NMR analysis, the ratio of the area of a second peak to the area of a first peak that is detected at δ = -122 ppm and assigned to F in a straight chain moiety is 0.01% to 5.0%, the second peak being other than the first peak and a spinning side band thereof, while being present between δ = -60 ppm and δ = -200 ppm.

A bearing seal includes a seal case, a sleeve, and a thrust bumper that is disposed between the seal case and the sleeve and that is composed of a material that is at least 90% polytetrafluoroethylene by weight. The thrust bumper has an initial axial thickness that defines a spacing between the seal case and the sleeve when the seal case and the sleeve are compressed together during assembly of the bearing seal. The thrust bumper has a modified axial thickness less than the initial axial thickness after a break-in phase of the bearing seal.

The application provides a modified polyimide@polyvinyl fluoride double-layer fiber membrane and a preparation method thereof, and belongs to the technical field of fiber membrane preparation; the preparation process comprises the following steps: preparation of NH2-MWCNT; preparation of casting solution and core solution; and preparation of the modified polyimide@polyvinyl fluoride double-layer fiber membrane. The modified polyimide@polyvinyl fluoride double-layer fiber membrane comprises an inner layer and an outer layer; the inner layer is polyvinyl fluoride; the outer layer is NH2-MWCNT modified polyimide; the polyimide is any one of Matrimid5218 and P84; the dry-wet method and the co-extrusion method are adopted; and then heat crosslinking is performed to obtain the NH2-MWCNT modified polyimide@polyvinyl fluoride double-layer fiber membrane.

The utility model relates to the technical field of bubble aluminum heat insulation film blanket production equipment, and discloses a polyvinyl fluoride flame-retardant bubble aluminum heat insulation film blanket production device which comprises a calendering box, an inlet and an outlet are formed in the two ends of the calendering box respectively, and two rows of horizontal lower calendering rollers and upper calendering rollers are rotationally connected into the calendering box. Lower transmission shafts rotationally connected with the calendering box are fixedly installed at the two ends of the lower calendering roller, upper transmission shafts are fixedly installed at the two ends of the upper calendering roller, a driving unit used for driving the lower transmission shafts to rotate at the same time is arranged on one side of the calendering box, and a transmission unit for synchronous transmission is arranged between every two upper transmission shafts and lower transmission shafts. The upper portion of the calendering box is provided with adjusting units used for adjusting the height positions of the multiple upper calendering rollers. According to the utility model, the distance between each lower calendering roller and each upper calendering roller can be adjusted through the adjusting unit, so that the quality of a polyvinyl fluoride film after calendering is improved, and the production quality of a polyvinyl fluoride flame-retardant bubble aluminum heat-insulating film blanket is improved.

To provide a polytetrafluoroethylene granulated powder which yields a molded body having little coloration and excellent cracking resistance.SOLUTION: A polytetrafluoroethylene granulated powder has a moisture content of 0.020 mass% or less and a Z value of 90 or more.SELECTED DRAWING: Figure 1

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 present disclosure relates to a coating composition comprising polyvinyl fluoride (PVF), an acrylic copolymer comprising groups with amine and / or hydroxyl functionality, and an isocyanate or melamine crosslinker comprising groups reactive towards amine or hydroxyl groups. Also disclosed herein are dried or cured coatings resulting from the coating composition, substrates coated with such coating compositions, the resulting dried and / or cured coated substrates, and methods for coating such substrates.

A magnet wire according to the present disclosure is provided with: a conductor; and an insulating layer that is superposed on the surface of the conductor, and is composed of a plurality of layers. The insulating layer includes a crosslinked layer that is superposed on the surface of the conductor, and a non-crosslinked layer that is superposed on the surface of the crosslinked layer. The main component of the non-crosslinked layer is a non-crosslinked fluororesin. The main component of the crosslinked layer is a crosslinked body of a tetrafluoroethylene-hexafluoropropylene copolymer, a crosslinked body of a polytetrafluoroethylene, or a crosslinked body of a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer. The content of the perfluoroalkyl vinyl ether unit in the tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer is 1.0% by mass to 6.0% by mass inclusive with respect to all monomer units.

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.

The invention discloses a hot-pressed jute fiber composite board for automotive trim and a preparation method thereof.The hot-pressed jute fiber composite board for automotive trim comprises a bottom layer, a base layer bonded to the top of the bottom layer, a middle layer arranged at the top of the base layer, a top layer arranged at the top of the middle layer and a flame-retardant layer bonded to the top of the top layer; the top of the base layer is coated with a flame-retardant layer, the top of the flame-retardant layer is coated with an anti-oxidation coating, the specific material of the base layer is a polypropylene plate, the specific material of the middle layer is a fibrilia composite plate, the specific material of the top layer is polyvinyl fluoride, and the specific material of the base layer is a high-density fiberboard. The flax fiber composite board is located in the middle, the flame-retardant layer and the coating are located at the top of the flax fiber composite board, the flax fiber composite board is protected, the strength and durability are both considered, the service life is greatly prolonged, and the bottom layer facilitates bonding installation of the flax fiber composite board.

The present disclosure relates to a micro or nano porous membrane composed of a stretched membrane of a fluororesin membrane, wherein the fluororesin membrane contains sintered bodies of a plurality of core-shell particles containing fluororesins, wherein the core-shell particles include cores and shells covering outer surfaces of the cores, wherein an average particle size of the core-shell particles before being sintered is greater than or equal to 100 nm and less than or equal to 1,000 nm, wherein a ratio of a volume of the shells to a volume of the cores in the core-shell particles before being sintered is greater than or equal to 2 / 98 and less than or equal to 50 / 50, wherein a fluororesin of the cores is a tetrafluoroethylene-hexafluoropropylene copolymer, a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer or a combination thereof, and a fluororesin of the shells is polytetrafluoroethylene, and wherein a first heat of fusion of the fluororesins in the core-shell particles is less than or equal to 68 J / g.

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.

To provide a cathode unit having electric resistance and ionic resistance as low as possible, and a method for manufacturing the cathode unit on a large scale.SOLUTION: A cathode unit has a layer composed of a composite material having an electrode material, a solid electrolyte material, a conductive additive, and polytetrafluoroethylene as a binder. The composite material contains less than 1 wt.% of polytetrafluoroethylene, and the polytetrafluoroethylene is at least partially present as fibrillated polytetrafluoroethylene.SELECTED DRAWING: Figure 1

Provided is a polytetrafluoroethylene granulated powder by which a molded body having little coloration and excellent cracking resistance can be obtained. The polytetrafluoroethylene granulated powder has a moisture content of 0.020 mass% or less and a Z value of 90 or greater.