30 results about "Polychlorotrifluoroethylene" patented technology

The invention belongs to the technical field of PCTFE film preparation, and particularly relates to a preparation process of a PCTFE film with low water vapor permeability, high strength and yellowing resistance. The preparation process comprises the following steps: (1) preparing modified polytrifluorochloroethylene resin; (2) preparing a mixture of fluorosilane modified alpha-zirconium phosphate and vermiculite nanosheets; (3) preparing a KH-550 silane coupling agent modified aluminum borate crystal whisker; and (4) preparing the PCTFE film with low water vapor permeability, high strength and yellowing resistance. According to the preparation technology of the PCTFE film, segmented temperature control is matched with the shearing speed in the twin-screw extrusion process, agglomeration of a mixture of fluorosilane modified alpha-zirconium phosphate and vermiculite nanosheets is avoided, performance complementation of all the components is ensured, the strength of the prepared PCTFE film is enhanced through aluminum borate whiskers, and the tensile strength of the PCTFE film is improved. The antioxidant and the ultraviolet light absorber solve the oxidation problem in high-temperature processing, and synchronous improvement of barrier, strength and weather resistance is achieved.

Provided is a formed article including polychlorotrifluoroethylene, wherein the polychlorotrifluoroethylene has a melting point of 211 to 216° C., and the formed article has a projected area of 1,000 mm2 or more, a thickness of 25 to 50 mm, and a degree of crystallinity of 65% or less.

The invention relates to the technical field of high polymer materials, in particular to a preparation method of polytrifluorochloroethylene resin. The invention relates to a preparation method of polytrifluorochloroethylene resin, which comprises the following steps: adding perfluoroperoxydicarbonate into a polymerization kettle, adding quantitative carbon dioxide and polytrifluorochloroethylene, and carrying out polymerization reaction; after cooling, adding a reducing agent for polymerization reaction; and after the polymerization is finished, reducing the pressure of the polymerization kettle, and recovering carbon dioxide in the kettle to obtain the polytrifluorochloroethylene resin. The prepared polytrifluorochloroethylene resin is in a bead shape, the melt mass flow rate is low, the tensile strength and the elongation at break are high, the color is not changed under the high-temperature heating condition, and various properties are excellent.

The utility model discloses a polytrifluorochloroethylene composite film and a packaging bag, and the polytrifluorochloroethylene composite film comprises a polytrifluorochloroethylene layer which is provided with a polytrifluorochloroethylene film; the first polyurethane glue layer is arranged below the polytrifluorochloroethylene layer; the second polyurethane glue layer is arranged below the polytrifluorochloroethylene layer; the co-extrusion film is arranged below the first polyurethane glue layer; the second polyurethane glue layer is arranged below the co-extrusion film; and the polyvinyl chloride layer is arranged below the second polyurethane glue layer. The barrier property is also improved while the interface peel strength is improved.

The application discloses a kind of continuous extrusion forming methods of polytrifluorochloroethylene rod, specifically extruder plasticizing, extrusion mold forming, rod shaping, damping, heat preservation, cooling, cutting.Compared with prior art molding process, the application can greatly improve the stability of product performance, and the performance index fluctuation is small;The probability of occurrence of delamination, black spots, bubbles and the like is reduced, and the qualified rate is improved.The production efficiency is greatly improved, which is more than 10 times of the molding process, the utilization rate of the material for subsequent processing is greatly improved, the material waste rate is reduced by more than 5 times, and the material replacement time is saved by 1 / 5.

The application provides a preparation method for improving the interface performance of polytrifluorochloroethylene and a metal matrix in hot plastic die forming. The method comprises the following steps: S1, modifying the surface of polytrifluorochloroethylene powder through a dopamine solution; and S2, integrally forming the modified polytrifluorochloroethylene with a metal matrix in a mold through hot pressing. The method for modifying the surface of polytrifluorochloroethylene through a dopamine solution can effectively enhance the bonding strength of polytrifluorochloroethylene and a metal, and has important applications in polytrifluorochloroethylene valve and valve aerospace products.

The iodine working medium high-pressure electromagnetic valve of the reed structure comprises an inlet assembly, a coil assembly, a valve element assembly and a valve seat which are sequentially connected from left to right in the axial direction, and the coil assembly is arranged to be capable of controlling the valve element assembly to do reciprocating motion through power on and off so that the valve element assembly can control on and off of a valve runner; wherein the valve element assembly comprises an outer armature, an inner armature, a reed, a valve element, an inner backing ring, an outer backing ring and a pressing ring, the inner armature, the valve element and the pressing ring are coaxially arranged in sequence from left to right, and the outer backing ring and the outer armature are arranged outside the inner armature in sequence from inside to outside; the inner armature is connected and clamped by reeds arranged at the two ends of the inner armature, so that the inner armature does not have a sliding fit surface during axial movement; the valve element is made of polytrifluorochloroethylene, and it is guaranteed that the valve element is not corroded in the iodine working medium state. The electromagnetic valve is reasonable in structure, convenient to machine and assemble, high in corrosion resistance and long in service life, and the production qualification rate is increased while miniaturization and light weight are achieved.

The present invention provides a laminated film usable in the manufacture of PTP bottoming material, which can be manufactured by laminating a resin layer containing polychlorotrifluoroethylene and a resin layer containing a resin other than polychlorotrifluoroethylene by solvent-free lamination, and which has sufficiently high peel strength between these resin layers. [Solution] A laminated film 1 comprising an adhesive layer 13, a first resin layer 11 provided on one surface 13b thereof, and a second resin layer 12 provided on the other surface 13a thereof, wherein the adhesive layer 13 contains a urethane-based adhesive, the first resin layer 11 contains polyvinyl chloride, polyethylene, polypropylene, or polyester, and the second resin layer 12 contains polychlorotrifluoroethylene, and when a 180° peel test is performed at room temperature using a 15 mm wide test piece cut from the laminated film 1, the peel strength between the first resin layer 11 and the second resin layer 12 is 2 N / 15 mm or more.

Provided is a polychlorotrifluoroethylene containing chlorotrifluoroethylene unit, wherein a content of chlorotrifluoroethylene unit is 95.0 to 100 mol % relative to all monomer units, and a ratio, (A) / (B), of a peak area (A) derived from a double bond relative to a peak area (B) derived from a main backbone is 0.020% or less.

The application belongs to the technical field of composite materials, and particularly relates to a low-temperature-resistant anti-permeation carbon fiber reinforced composite material and a preparation method thereof. The preparation method comprises the following steps: dispersing polyamide acid grafted hydroxylated nano-silica in a solvent, adding nano-rubber and performing ultrasonic treatment to obtain a sizing agent; immersing carbon fibers after desizing in the sizing agent, taking out and drying to obtain sized carbon fibers; compounding polytrifluorochloroethylene resin and the sized carbon fibers to obtain a carbon fiber reinforced polytrifluorochloroethylene prepreg tape; compounding polyether sulfone resin, polyphenylene sulfide resin and the sized carbon fibers to obtain a carbon fiber reinforced polyether sulfone / polyphenylene sulfide resin prepreg tape; stacking the carbon fiber reinforced polytrifluorochloroethylene prepreg tape in an inner layer and the carbon fiber reinforced polyether sulfone / polyphenylene sulfide resin prepreg tape in an outer layer, and curing and forming, so that the carbon fiber composite material is obtained. The carbon fiber composite material can not only maintain high mechanical properties, but also has an ultra-low leakage rate under ultra-low temperature cycles.

The present application provides a preparation method of narrow molecular weight distribution polytrifluorochloroethylene resin. The specific steps are as follows: a solvent, a dispersing agent, a pH buffer, a molecular weight regulator, and trifluorochloroethylene monomers and an initiator are added into a polymerization reactor, pre-polymerization is carried out under a certain temperature and pressure, the obtained pre-polymer mixture is continuously sent into a three-dimensional plug flow microcapsule reaction device for continuous polymerization reaction, the obtained crude product meeting the polymerization degree requirement is continuously extruded through a devolatilization process, while removing the solvent and other impurities, the unstable end groups of the product are capped by adding a capping agent, and the narrow molecular weight distribution polytrifluorochloroethylene resin is obtained; the solvent collected by the devolatilization process can be continuously recycled and used in the subsequent polymerization section.

The invention provides a method for regulating and controlling metal-fluoroplastic binding force through a multi-scale interface and a metal-fluoroplastic product. The method comprises the following steps that S1, the surface of a metal matrix is treated in an electrolysis mode, electrolyte is at least two of hydrochloric acid, sulfuric acid and phosphoric acid, and hydrochloric acid is necessary; and S3, the cavity of the metal matrix treated in the S2 is filled with polytrifluorochloroethylene through thermoplastic compression molding. According to the method for adjusting and controlling the metal-fluoroplastic interface in multiple sizes, the binding force between the metal and the fluoroplastic is effectively enhanced, and the method is suitable for a metal matrix in a complex geometrical shape and has important application in a polytrifluorochloroethylene valve low-temperature sealing assembly.

The application relates to the technical field of high polymer materials, in particular to a preparation method of a polytrifluorochloroethylene resin. The preparation method of the polytrifluorochloroethylene resin comprises the following steps: adding perfluoroperoxycarbonate into a polymerization kettle, adding a certain amount of carbon dioxide and polytrifluorochloroethylene, and performing polymerization reaction; adding a reducing agent after cooling to perform polymerization reaction; after the polymerization is completed, the polymerization kettle is depressurized, and the carbon dioxide in the kettle is recovered to obtain the polytrifluorochloroethylene resin. The prepared polytrifluorochloroethylene resin is in the form of beads, has a low melt mass flow rate, high tensile strength and high elongation at break, does not discolor under high-temperature heating conditions, and has excellent performances.

The invention provides a continuous preparation method of a polytrifluorochloroethylene-metal complex, and relates to the field of polymer-metal matrix composites.The method comprises the following steps that S1, a metal face combined with polytrifluorochloroethylene is treated through a sand blasting process; and S2, heating and melting polytrifluorochloroethylene by adopting a flat plate hot press with melting and cooling functions, filling the cavity of the treated metal matrix with the polytrifluorochloroethylene, and cooling and shaping to obtain the polytrifluorochloroethylene-metal complex (valve clack). Compared with a traditional fluoroplastic processing method, polytrifluorochloroethylene is formed through heating and cooling of one device, the novel method for automatic hot press forming of the polytrifluorochloroethylene-metal complex is developed, and the method has the advantages of being stable in process and reliable in quality and has important application in polytrifluorochloroethylene valve sealing.

The application provides a kind of continuous preparation method of polytrifluorochloroethylene-metal composite, it is related to polymer-metal matrix composite field, the method comprises the following steps: S1, first, the metal surface combined with polytrifluorochloroethylene is treated using sand blasting process;S2, then, using the flat plate hot press with melting and cooling function, polytrifluorochloroethylene is heated and melted, and is filled in the cavity of the metal matrix after processing, then, after cooling and setting, polytrifluorochloroethylene-metal composite (valve) is prepared.Compared with the traditional fluoroplastic processing method, in the application, one equipment is used for heating and cooling to form polytrifluorochloroethylene, a new method of automatic hot-pressing forming polytrifluorochloroethylene-metal composite is developed, the method has the advantages of stable process and reliable quality, and has important application in polytrifluorochloroethylene valve sealing.

Disclosed in the present invention are a composite material for a cable shielding layer film and a preparation method therefor, a resin matrix of the composite material comprising 30-60 parts by mass of metallocene linear low-density polyethylene, 3-10 parts by mass of an ethylene-octylene copolymer, 3-20 parts by mass of polytrifluorochloroethylene, 3-10 parts by mass of an ethylene trifluorochloroethylene copolymer and 15-40 parts by mass of an ethylene-tetrafluoroethylene copolymer, with the resin matrix totaling 100 parts by mass. The composite material for a cable shielding layer film provided by the present invention has a tensile strength greater than 40 MPa and is not prone to delamination from a metal tape, a yield strength greater than 10 MPa and is not easily stretched or deformed during lamination with the metal tape, and a water vapor transmission rate of less than 6, thereby exhibiting good water vapor barrier performance. In addition, the composite material is resistant to hydrolysis, exhibits good aging resistance, provides effective protection for the metal tape within the service life thereof, and further has excellent flame‑retardant properties.

The invention belongs to the technical field of packaging materials, and relates to a packaging material for an electronic cigarette and a preparation method thereof, the packaging material for the electronic cigarette is composed of a polytrifluorochloroethylene layer, a polyurethane adhesive layer and a polyvinyl chloride layer which are stacked; wherein an adhesive adopted by the polyurethane adhesive layer is a three-component polyurethane adhesive. The preparation method at least comprises the following steps: compounding the polytrifluorochloroethylene layer and the polyvinyl chloride layer through a three-component polyurethane adhesive by adopting a dry compounding process, and drying and curing to obtain the packaging material for the electronic cigarette. The packaging material for the electronic cigarette can effectively block permeation of external water vapor and oxygen, meanwhile, the storage and transportation safety of the electronic cigarette in a low-temperature environment is improved, and the specific fragrance of the electronic cigarette is effectively kept.

The invention belongs to the technical field of composite materials, and particularly relates to a low-temperature-resistant anti-seepage carbon fiber reinforced composite material and a preparation method thereof. The preparation method comprises the following steps: dispersing polyamide acid grafted hydroxylated nano silicon dioxide in a solvent, adding nano rubber, and carrying out ultrasonic treatment to obtain a sizing agent; dipping the desized carbon fibers in a sizing agent, taking out and drying to obtain sized carbon fibers; the polytrifluorochloroethylene resin and the sizing carbon fiber are compounded, and a carbon fiber reinforced polytrifluorochloroethylene prepreg tape is obtained; polyethersulfone resin and polyphenylene sulfide resin are blended and compounded with the sizing carbon fibers, and a carbon fiber reinforced polyethersulfone / polyphenylene sulfide resin prepreg tape is obtained; laying the carbon fiber reinforced polytrifluorochloroethylene prepreg tape on the inner layer, laying the carbon fiber reinforced polyethersulfone / polyphenylene sulfide resin prepreg tape on the outer layer, and curing and molding to obtain the carbon fiber reinforced polytrifluorochloroethylene / polyphenylene sulfide composite material. The carbon fiber composite material disclosed by the invention not only can keep high-super mechanical properties, but also has an ultralow leakage rate under ultralow-temperature circulation.

Compositions and methods of producing the same are provided. In an exemplary embodiment, a composition includes a high temperature PCTFE (poly chlorofluoro ethylene) produced by a high temperature process. The high temperature PCTFE includes some fluorine endcaps. The composition also includes a low temperature PCTFE produced by a low temperature process.

The utility model discloses a high-temperature-resistant disc brake assembly, relates to the technical field of disc brakes, and solves the problems that polytrifluorochloroethylene and poly-p-xylylene in the disc brake assembly have heat resistance, and polytrifluorochloroethylene has air impermeability, so that the temperature of a brake disc rises slowly when the brake disc brakes on a road for a long time, and the brake disc cannot be damaged. According to the technical scheme, the problems that in the prior art, due to the fact that the temperature of the brake disc is too high, the cooling rate is low, the brake disc is damaged due to the fact that the brake disc is used for a long time, and the safety of the brake disc is reduced are solved. The brake disc comprises a brake disc body and a tetrafluoroethylene metal disc, and the tetrafluoroethylene metal disc is fixedly connected to the interior of the brake disc body; and meanwhile, the brake disc has the characteristics of high temperature resistance, low temperature resistance and corrosion resistance of tetrafluoroethylene, and after the brake disc is used and generates temperature, the brake disc rotates, and the internal temperature can be dissipated through the cooperation between the arranged waterproof grooves and the inclined grooves.

The invention provides a lubricating grease composition and a preparation method thereof, and the lubricating grease composition comprises the following raw materials by mass: 70.0-85.0% of base oil; 8.0 to 15.0% of a thickening agent; 0.2%-1.0% of an antioxidant; 1.0 to 3.0% of an antirust agent; 0.3 to 1.5 percent of an anti-wear reagent at extreme pressure; 0.5-4% of a viscosity index improver; 1-5% of a colloid stability improver; 1-5% of polytrifluorochloroethylene powder with the particle size of 0.1-1 micron; the silicone oil accounts for 30-100% of the base oil. According to the lubricating grease composition, the base oil containing the silicone oil is adopted to act together with the polytrifluorochloroethylene powder and other components, so that the lubricating grease composition has excellent low-temperature fluidity at-73 DEG C, and the low-temperature pumping performance of the lubricating grease is ensured.

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

Provided is a polytrifluorochlor oethylene containing trifluorochlor oethylene units, the content of the trifluorochlor oethylene units being 95.0-100 mol% with respect to the total monomer units, and the ratio ((A) / (B)) of the area (A) of a peak derived from a double bond to the area (B) of a peak derived from a main skeleton being 0.020% or less.

The invention discloses a preparation method of polytrifluorochloroethylene resin. The preparation method comprises the following steps: adding water, bivalent iron salt, sulfite, a chain transfer agent and 65-70% of organic acid into a reaction container, mixing, sequentially vacuumizing the reaction container, replacing inert gas until the oxygen content is qualified, emptying, then adding a trifluorochloroethylene monomer and tert-butyl peroxybenzoate, and carrying out polymerization reaction, so as to obtain the chlorotrifluorochloroethylene-tert-butyl peroxybenzoate copolymer. And when the first polymerization reaction is carried out for 2-2.5 hours, adding 30-35% of the mass of the residual organic acid to carry out a second polymerization reaction, and when the pressure in the reaction container is reduced by 2-5kpa compared with the reaction pressure in the second polymerization reaction stage, stopping the reaction to prepare the polytrifluorochloroethylene resin. According to the preparation process, the polymerization reaction speed at low temperature and the molecular weight of a polymerization product are remarkably increased, the content of unstable end groups in a resin structure is reduced, and the strength loss temperature and the yellowing index of a polymer are greatly increased.

The present application relates to a kind of graphene grafting modified polytrifluorochloroethylene electret composite film, the electret composite film includes upper layer, middle layer and lower layer, the middle layer is graphene grafting modified polytrifluorochloroethylene film, the upper layer and lower layer are polytrifluorochloroethylene film.The present application is modified by grafting graphene to polytrifluorochloroethylene molecular chain, improves the charge storage stability of composite film under high temperature and high humidity environment, and compared with blending addition method, graphene and polytrifluorochloroethylene have better compatibility.

An implantable device and method of manufacture include a substantially hermetic polychlorotrifluoroethylene (PCTFE) enclosure with closely-spaced wires extending out of the enclosure. The implantable device includes a PCTFE first portion of an enclosure and a PCTFE second portion of the enclosure. The first and second portions are configured to mate with each other to form the enclosure. A plurality of insulated wires extend between the first and second portions of the enclosure. Each of the insulated wires are parallel to each other and separated by less than 150 micrometers (μm) from a neighboring wire. A thermal weld seam of PCTFE is disposed between the first portion of the enclosure and the second portion of the enclosure and conformally adheres around insulation of each wire such that the enclosure is sealed.

Provided is a molded body containing polytrifluorochloroethylene, in which the melting point of the polytrifluorochloroethylene is 211-216 DEG C, the projected area of the molded body is 1000 mm2 or more, the thickness of the molded body is 25-50 mm, and the crystallinity of the molded body is 65% or less.

The invention provides a heat-induced irreversible color-changing anti-uncovering transfer sealing anti-counterfeiting label and a manufacturing method thereof, and relates to the technical field of anti-counterfeiting packaging materials, the heat-induced irreversible color-changing anti-uncovering transfer sealing anti-counterfeiting label comprises a base material layer, an anti-transfer glue layer, a heat-induced irreversible color-changing ink layer and a surface protection layer which are sequentially arranged from bottom to top, and all the layers are tightly attached to form an integrated structure; wherein the base material layer is a polyethylene glycol terephthalate film, and the raw materials of the anti-transfer adhesive layer are composed of a two-component solvent-free polyurethane adhesive, a fluorine modified acrylate copolymer and a silane coupling agent. The heat-induced irreversible color-changing ink layer is prepared from the following raw materials: spiropyrane microcapsule pigment, fluorine-modified polyurethane resin, fatty alcohol-polyoxyethylene ether sodium sulfate and deionized water, and the surface protection layer is a polytrifluorochloroethylene resin layer. According to the invention, double anti-counterfeiting cooperation of high-temperature warning and anti-transfer is realized, and the risk of anti-counterfeiting failure in a high-temperature environment is avoided; and the application range is wide, and the diversified anti-counterfeiting requirements of high-end products are met.

This invention discloses a fluoropolymer additive, which is a copolymer of trifluorochloroethylene and perfluoro(2,2-dimethyl)-1,3-dioxane or perfluoropropylene-vinyl ether. The fluoropolymer additive contains 30-70 mol% of the structural units of perfluoro(2,2-dimethyl)-1,3-dioxane or perfluoropropylene-vinyl ether. The melt index of the fluoropolymer additive at 275°C and 2.16 kg is 500-2000 g / 10 min. Using the fluoropolymer additive provided by this invention as an additive improves the processing performance of polychlorotrifluoroethylene resin, ensuring the water vapor transmission rate of the polychlorotrifluoroethylene film while simultaneously improving the visible light transmittance and tensile strength at break of the polychlorotrifluoroethylene film.

The invention relates to a high-voltage device (1), in particular a measuring transducer, with an encapsulating housing (2) and with at least one active component (3), which is arranged in the encapsulating housing (2). The at least one active component (3) is coated with at least one polymer (4). A method according to the invention for increasing the dielectric strength in a high-voltage device (1) involves at least one active component (3), which is arranged in an encapsulating housing (2), in particular filled with clean air (6), being coated with at least one polymer (4), in particular by shrink-fitting a shrink tube and / or by immersion-bath coating and / or by spray coating, wherein the polymer (4) is applied in particular as polytetrafluoroethylene (PTFE), polychlorotrifluoroethylene (PCTFE), polyolefin and / or an ethylenetetrafluoroethylene copolymer (ETFE).