210 results about "Fiber coating" patented technology

The invention discloses an aramid fiber coated polyolefin battery diaphragm and a preparation method and application thereof, the aramid fiber coated polyolefin battery diaphragm can be used for manufacturing a lithium ion battery, and the aramid fiber coated polyolefin battery diaphragm is prepared by the following method: (1) treating a polyolefin base membrane by using a strong oxidant to obtain a modified base membrane; (2) dissolving aramid resin in a solvent to obtain an aramid coating solution; and (3) coating the surface of the modified base membrane with the aramid fiber coating liquid, and then curing. According to the invention, the interface bonding strength of the base membrane and the aramid fiber coating is obviously enhanced, so that the aramid fiber coating can give full play to high heat resistance, on the basis of ensuring the tensile strength of the diaphragm, the overall thermal shrinkage rate of the diaphragm is reduced, the risk of high-temperature short circuit is effectively inhibited, and the composite diaphragm with high porosity, strong mechanical property, high uniformity and no surface defect is formed; the method is suitable for high-energy-density lithium ion batteries, and the safety and high-temperature working condition stability of the batteries are remarkably improved.

The invention discloses a para-aramid coating diaphragm and a preparation method thereof, the para-aramid coating diaphragm comprises a base membrane, a para-aramid coating and one or two ceramic coatings, the para-aramid coating is connected to one surface of the base membrane, and the ceramic coatings are arranged on the surface of the base membrane; when the number of the ceramic coating is one, the ceramic coating is connected to the other surface of the base membrane or connected to the para-aramid coating; when the number of the ceramic coating layers is two, the two ceramic coating layers are a first ceramic coating layer and a second ceramic coating layer, the first ceramic coating layer is connected to the para-aramid fiber coating layer, and the second ceramic coating layer is connected to the other surface of the base membrane; wherein the para-aramid coating comprises para-aramid, gas phase powder and first ceramic powder, and each layer of ceramic coating comprises second ceramic powder. The para-aramid coating diaphragm disclosed by the invention has good temperature resistance and adhesive property.

The invention belongs to the technical field of beam combiner manufacturing, and discloses a beam combiner manufacturing method, which comprises the following steps: carrying out primary dispensing on a non-coating layer on one side of a multi-fiber stripping opening of an optical fiber bundle by using low-refractive-index glue so as to fix the relative positions of a pumping optical fiber and a signal optical fiber; the optical fiber bundle is placed in the packaging container in a suspended state, secondary dispensing is carried out at the multi-fiber stripping opening of the optical fiber bundle by using the low refractive index again so as to keep the suspended state, and the range of secondary dispensing covers a part of the coating layer and the primary dispensing position; and dispensing the multi-fiber coating layer and the single-fiber coating layer of the optical fiber bundle by using high-refractive-index glue. According to the invention, by weighing the heat dissipation and fixing functions of the glue and the influence of the acting force on the optical fiber bundle, the packaging is better realized, so that the long-term reliable use of the beam combiner is realized.

The invention relates to the technical field of coating compositions, in particular to a polyvinyl alcohol fiber coating and a preparation method thereof. The defects that an existing polyvinyl alcohol coating is poor in mechanical property and water resistance are overcome. The preparation method comprises the following steps: preparing modified short polyvinyl alcohol fibers from hydrophobic modified nano silicon dioxide, short polyvinyl alcohol fibers with the average length of 3mm and glycidyl methacrylate as raw materials; long polyvinyl alcohol fibers with the average length of 6 mm are firstly subjected to plasma treatment to obtain plasma long polyvinyl alcohol fibers, and then the plasma long polyvinyl alcohol fibers and epoxy chloropropane are used as raw materials to prepare modified long polyvinyl alcohol fibers; the polyurethane resin, the modified short polyvinyl alcohol fiber, the modified long polyvinyl alcohol fiber, the compound plasticizer, the waterproof agent, the defoaming agent and the like are used as raw materials, and the finally prepared polyvinyl alcohol fiber coating has the advantages of being good in mechanical property and high in water resistance.

A resin composition for optical fiber coating contains a photopolymerizable compound and a photopolymerization initiator, in which the photopolymerizable compound contains epoxy di(meth)acrylate having a bisphenol skeleton and alkylene oxide-modified tri(meth)acrylate, and a content of the alkylene oxide-modified tri(meth)acrylate is 0.5% by mass or more and less than 40% by mass based on the total amount of the photopolymerizable compound.

The present invention relates to a glass fiber (1) comprising at least one fiber core (10), at least one fiber cladding (11) which at least substantially encloses the fiber core (10) in the circumferential direction (U) and along the longitudinal axis (X), and at least one fiber coating (12) which substantially encloses the fiber cladding (11) in the circumferential direction (U) and along the longitudinal axis (X), wherein the glass fiber (1) has at least one first exposed portion (13a) where the fiber cladding (11) is exposed by the fiber coating (12), for removing light (B) at least from the fiber cladding (11), wherein at least the fiber cladding (11) has a plurality of recesses (14) at least substantially in the radial direction (R), which recesses are designed to at least partially discharge the light (B) at least from the fiber cladding (11). The glass fiber (1) is characterized in that the recesses (14), as longitudinal recesses (14), are each formed at least in portions precisely along the longitudinal axis (X).

The utility model provides an optical fiber coating stripping force testing device. The optical fiber coating stripping force testing device comprises an operation table and two supporting frames fixedly installed at the top of the operation table, two sliding frames are installed at the top of the operation table in a sliding mode, fixing frames are fixedly installed at the tops of the two sliding frames, stripping mechanisms are arranged on the two fixing frames, and the stripping mechanisms are arranged on the two supporting frames. A placement groove is formed in any supporting frame, a threaded cylinder is rotationally installed on the top of the supporting frame, a threaded rod is installed on the inner wall of the threaded cylinder in a threaded mode, a lifting plate is slidably installed in the supporting frame, and the bottom end of the threaded rod and the top of the lifting plate are fixedly installed. The optical fiber coating stripping force testing device provided by the utility model has the advantages that the operation is convenient, and the detection accuracy is improved.

The invention belongs to the technical field of molecular adsorption separation solid-phase microextraction, and discloses a covalent organic framework solid-phase microextraction fiber coating modified after sulfydryl-alkene click reaction as well as a preparation method and application of the covalent organic framework solid-phase microextraction fiber coating. The preparation method comprises the following steps: mixing a covalent organic framework, a derivatization reagent, a first initiator and a first solvent, and carrying out a click reaction under a protective atmosphere to obtain a post-modified covalent organic framework; and mixing the post-modified covalent organic framework, a cross-linking agent, a second initiator and a second solvent, and carrying out polymerization reaction in a protective atmosphere to obtain the thiol-ene click reaction post-modified covalent organic framework solid-phase microextraction fiber coating. Groups with different recognition capabilities are introduced into the porous structure of the covalent organic framework, the adsorption performance of the covalent organic framework is remarkably improved, the solid-phase microextraction fiber coating is further prepared by adopting a thermal polymerization method, and the use form of the covalent organic framework is enriched.

The invention discloses a continuous fiber structural part comprising an embedded connecting piece and a manufacturing method of the continuous fiber structural part, and belongs to the technical field of additive manufacturing. A plurality of embedded parts and locking bolts are arranged in the fiber structural part; through holes are formed in the embedded parts, the outer end faces of the through holes are flush with one end of the fiber structural part, the locking bolts are inserted into the through holes from the inner end faces of the through holes, and one locking bolt is in threaded connection with one embedded part; according to the structure, the connecting piece for additive manufacturing is pre-buried in the continuous fiber additive manufacturing forming printing process, meanwhile, the reverse locking bolt is installed to conduct fiber coating on the connecting piece, the mechanical property of connection between the pre-buried connecting piece and a component is improved, and meanwhile, the mechanical connection mode of a traditional composite material structural piece is replaced.

The invention discloses a high-temperature-resistant water-soluble aramid coating diaphragm and a preparation method thereof, and belongs to the technical field of battery diaphragms. The diaphragm is obtained by coating the surface of a base membrane with water-soluble aramid fiber slurry and performing cross-linking and drying, the base membrane is a PE / PVA composite membrane; the water-soluble aramid fiber slurry is prepared from the following raw materials in parts by mass: 10 to 20 parts of modified aramid fiber polymer, 40 to 80 parts of deionized water, 3 to 6 parts of cosolvent and 5 to 8 parts of multi-epoxy group cross-linking agent; the modified aramid fiber polymer is obtained by carrying out polymerization reaction on 1, 4-phenylenediamine-2-sulfonic acid and 2, 6-dipicolinic acid. The hydrophilic property of the polymer is improved by the pyridine ring and sulfonic acid introduced into the modified aramid polymer, the prepared water-based slurry is more environment-friendly, the reaction of the multi-epoxy group cross-linking agent and the polyvinyl alcohol of the PE / PVA composite diaphragm under the heating condition is promoted through the sulfonic group, a cross-linked network is formed, and the binding force of the coating and the base membrane is enhanced.

The invention relates to the technical field of biomedical materials, in particular to a degradable zinc-based composite GBR film with the surface loaded with a nanometer electrostatic spinning fiber coating and preparation and application of the degradable zinc-based composite GBR film. According to the degradable zinc-based composite GBR membrane with the surface loaded with the nano electrostatic spinning fiber coating, the nano fiber coating is implanted into the surface of a zinc-based material such as zinc alloy by adopting an electrostatic spinning technology, and the degradable zinc-based composite GBR membrane with the surface loaded with the nano electrostatic spinning fiber coating can inhibit excessive release of zinc ions, improve biocompatibility of the zinc alloy and the like, promote osteoblast differentiation and promote angiogenesis. The electrostatic spinning coating on the surface of the zinc-based composite GBR membrane serves as a physical barrier to block invasion of epithelial cells and fibrocytes, and angiogenesis is promoted along with degradation of fibers and slow release of drugs; the porous zinc alloy and the like in the middle layer not only provide mechanical support, but also release zinc ions in the degradation process to achieve multiple functions of resisting bacteria and promoting osteogenesis.

The invention discloses application of zwitterionic covalent organic framework solid-phase microextraction fibers in neurotransmitter analysis, and the zwitterionic covalent organic framework solid-phase microextraction fibers are prepared by taking ethidium bromide, 2, 5-diaminobenzoic acid and trialdehyde phloroglucinol as functional monomers and acetic acid as a catalyst through Schiff base reaction condensation to obtain the zwitterionic covalent organic framework solid-phase microextraction fibers. The ionic covalent organic framework material is obtained. The ionic covalent organic framework solid-phase micro-extraction fiber coating prepared by the invention has good hydrophilicity, and besides, functional groups such as hydroxyl, carboxyl, phenyl and quaternary ammonium which are rich in the structure of the coating can interact with a target analyte through ion exchange action, pi-pi stacking, hydrogen-bond interaction and hydrophilic and hydrophobic interaction; the strong specific adsorption and efficient enrichment capability on neurotransmitters are shown. The ionic covalent organic framework solid-phase microextraction fiber prepared by the invention realizes efficient enrichment and extraction analysis of neurotransmitters with different polarities in a complex biological sample matrix.

The invention belongs to the technical field of beam combiner packaging, and discloses a beam combiner heat dissipation packaging method, which can enable the packaging of an optical fiber bundle to be simpler and low in cost by adopting a shell structure only comprising a placement piece and a sleeve, and can enable the packaging of the optical fiber bundle to be more stable by gradually coating low-refractive-index glue of which the refractive indexes are gradually increased on a bare fiber of an output single fiber of the optical fiber bundle of the beam combiner. When the optical fiber coating layer is coated with the high-refractive-index glue, pyrogenic light leaked to the output single-fiber coating layer is dispersed in advance and is not completely concentrated on the subsequent optical fiber coating layer, so that the heating and burning risks of the optical fiber are effectively reduced, and meanwhile, the temperature of the optical fiber coating layer is further effectively reduced by coating the coating layer with the high-refractive-index glue, and the service life of the optical fiber coating layer is prolonged. Therefore, temperature stabilization and effective heat dissipation of the output single fiber are realized.

The invention provides a photocuring high-temperature-resistant optical fiber coating and a preparation method thereof, and the photocuring high-temperature-resistant optical fiber coating comprises the following components by weight: 40-80% of high-modulus acrylate modified methyl phenyl silicone oil; 10-50% of low-modulus acrylic ester modified methyl phenyl silicone oil; 5-30% of an acrylate monomer; 0.5 to 6% of a photoinitiator; and 0.05-1% of an antioxidant. According to the invention, high-modulus and low-modulus acrylic ester modified methyl phenyl silicone oil is compounded, high-modulus and low-molecular-weight acrylic ester modified methyl phenyl silicone oil is taken as a main body, the mechanical property is adjusted by the low-modulus and high-molecular-weight acrylic ester modified methyl phenyl silicone oil, and then the viscosity is adjusted by the active acrylic ester monomer; the optical fiber has the advantages of simple synthesis process, excellent heat resistance and low temperature resistance, adjustable refractive index and mechanical property, easy stripping of an optical fiber coating and the like.

The utility model provides a metal framework fiber resin-based concrete pipeline. The metal framework fiber resin-based concrete pipeline comprises a fiber anti-seepage layer which is arranged on the outer side wall of a pipeline mold core and is wound and coated by leaching resin; the outer side wall of the fiber anti-seepage layer is coated with a one-way fiber layer through leaching resin; the outer side wall of the unidirectional fiber layer is wound and coated with a metal framework reinforced fiber resin-based concrete layer through leaching resin; the outer side wall of the metal framework reinforced fiber resin-based concrete layer is wound and coated with an outer annular fiber coating layer through leaching resin; continuous fibers adopted by the unidirectional fiber layer are of a fiber structure horizontally distributed in the axial direction of the pipeline mold core. Fibers of the metal framework reinforced fiber resin-based concrete layer are inorganic fibers and fabrics and metal fibers and fabrics; a metal framework of the metal framework reinforced fiber resin-based concrete layer is made of metal fibers, fabrics and metal wire meshes.

A resin composition for optical fiber coating contains a photopolymerizable compound and a photopolymerization initiator, in which the photopolymerizable compound contains a di(meth)acrylate having an oxypropylene group and a di(meth)acrylate having an oxyethylene group, and a mass ratio of a content of the oxypropylene group with respect to a content of the oxyethylene group in the photopolymerizable compound is 0.01 or more and 2.00 or less.

The invention discloses optical fiber coating layer stripping and optical fiber cutting integrated equipment, which comprises a bottom plate, and further comprises a clamp unit arranged at the upper end of the bottom plate and used for clamping an optical fiber piece; the tensioning and reversing unit comprises a tensioning assembly for straightening the optical fiber part and a steering assembly which is arranged at one end, opposite to the clamp unit, of the tensioning assembly and is used for steering the optical fiber part; and a laser unit. After the steering assembly is rotated by 180 degrees, the steering assembly drives the optical fiber part to rotate by 180 degrees, so that the coating layer of the optical fiber part originally located in the backlight area is ablated after being switched to face laser, in the process, the clamp unit is pulled again, and on the premise that the optical fiber part is straightened, the coating layer stripping area of the optical fiber part can extend again; the stripping area of the optical fiber piece can form a rotation area, a fiber core is prevented from being scratched in the cutting process, and the moving track of the optical fiber piece is always kept straight in the stripping process.

The utility model discloses a high-temperature-resistant stretch-resistant insulating tape which comprises a tape body, and the tape body comprises a base material layer, an acrylic acid adhesive layer, a ceramic fiber coating, a silicone rubber layer, a polyamide coating and a silicone oil release film layer. The acrylic acid adhesive layer is arranged on the bottom surface of the ceramic fiber coating and is used for providing an adhesive property; a corrugated structure is arranged on the acrylic acid adhesive layer; the silicone rubber layer is arranged on the top surface of the base material layer, and the silicone rubber layer is of a latticed structure. The ceramic fiber coating has a higher melting point and a lower thermal expansion coefficient, so that the adhesive tape body has better high-temperature resistance and can be suitable for various high-temperature application scenes; the silicone rubber layer has good elasticity and flexibility, so that the silicone rubber layer can be deformed to a certain degree and cannot be broken when being stretched; meanwhile, the silicon rubber layer is of a latticed structure, and the latticed structure can enable the insulating rubber tape to uniformly distribute stress when the insulating rubber tape is pulled, so that the tensile property is enhanced.

The application discloses an optical metamaterial fiber coating composite process and relates to the technical field of fiber coating. The optical metamaterial fiber coating composite process comprises the following steps: S1, raw material and equipment preparation: selecting a fiber base material, a metamaterial coating raw material and auxiliary modified raw material, the fiber base material being one of a single-mode optical fiber, a PA66 polymer fiber or a glass fiber, the purity of the metamaterial coating raw material being greater than or equal to 99.5%; selecting a coating equipment, a plasma cleaning machine, an ultrasonic cleaning machine and a low-temperature annealing furnace, completing equipment debugging and calibration and ensuring that equipment operation parameter errors meet preset standards. The optical metamaterial fiber coating composite process is convenient for applying a constant extrusion force to the glue during coating and compounding, the glue can enter the inside of the fiber base material, coating and compounding are more sufficient, and the quality of coating and compounding is improved.

The invention provides a gluing weight automatic adjusting and compensating method and device based on carbon fiber gluing, computer equipment and a storage medium. The method comprises the steps that a preset gram weight interval of carbon fiber gluing gram weight is set; providing a carbon fiber gluing machine, wherein the carbon fiber gluing machine is used for carrying out gluing operation on the carbon fibers; detecting the glue coating gram weight of the carbon fiber subjected to the glue coating operation in the current period; judging whether the carbon fiber gluing gram weight for gluing operation in the current period is within a preset gram weight interval or not; if the current carbon fiber gluing gram weight is out of the preset gram weight interval, a roller assembly gap of the carbon fiber gluing machine is controlled so as to adjust the gluing amount of the carbon fiber, and therefore manual sampling inspection is not needed, and the carbon fiber can be formed by presetting the total integral number sum of the composite coiled material of the carbon fiber needing to be formed and the resin and the volume fraction of the carbon fiber as a fixed value. According to the carbon fiber gluing gram weight in the current period, the gluing amount of the carbon fiber gluing machine is adjusted, and the resin content can be adjusted in the operation process of the gluing technology.

This invention relates to a method, apparatus, and packaging structure for in-situ packaging of fruits and vegetables using blown fiber spinning, addressing the current issues of efficiency and effectiveness in the use of nanofibers in fruit and vegetable packaging. This method selects carboxymethyl chitosan (CMCH) and polycaprolactone (PCL) as base materials, and uses SBS technology to directly deposit CMCH / PCL nanofibers layer by layer onto the surface of fruits and vegetables, forming a tightly adhered and stable fiber coating. The apparatus in this invention uses spiral-patterned conveyor rollers to simultaneously transport fruits and vegetables while performing blown spinning, achieving rapid and continuous in-situ packaging of fruits and vegetables. The in-situ packaging of this invention can be easily peeled off by hand, and it also serves as an excellent carrier for active substances, effectively inhibiting gray mold in fruits and vegetables. The in-situ packaging film forms a barrier on the surface of fruits and vegetables, reducing weight and hardness loss and delaying the ripening period after harvest.

The utility model provides a rotor and a motor, and belongs to the technical field of motors. Wherein the rotor comprises an iron core and a permanent magnet, a plurality of slotted hole groups are annularly distributed on the iron core at intervals, each slotted hole group comprises at least one slotted hole, the slotted holes penetrate through the iron core along the axial direction, the end part of at least one slotted hole in each slotted hole group extends to the periphery of the iron core, and a polymer coating layer is arranged on the periphery of the iron core; the number of the permanent magnets is multiple, and the multiple permanent magnets are correspondingly arranged in the slotted holes. According to the utility model, no magnetic isolation bridge is arranged at the periphery of the rotor, so that the problem of magnetic leakage can be reduced, and the permanent magnetic flux of the rotor can be improved. The polymer coating layer can reduce the problem that the permanent magnets are thrown out at a high rotating speed, and compared with a carbon fiber coating sleeve arranged on the periphery of the rotor, the polymer coating layer can reduce the cost. Therefore, the magnetic flux leakage problem can be improved on the basis of reducing the cost, the torque of the motor is improved, and the power density of the motor is increased.

Methods and systems for removing coatings from optical fibers. A system includes a gas source for providing gas, and a heater configured to heat the gas. The system includes a holder comprising first and second attachment features. The attachment features secure a coated optical fiber along a removal path. The system includes at least one nozzle connected to the gas source. The at least on nozzle is aimed in a nozzle direction that is towards the removal path at a pitch, such that the nozzle is non-perpendicular towards the removal path. The nozzle directs a continuous stream of the heated gas towards the coated optical fiber causing the coating of the coated optical fiber to be removed. The methods and systems may employ a second nozzle that may be offset from the first nozzle angularly and / or laterally with respect to the removal path.

The application relates to the technical field of fiber gratings, and discloses a preparation method of a large-area fiber grating and the fiber grating. The method is to make a glass tube with a refractive index close to that of a fiber coating adhere to the fiber under the action of high temperature by using the collapsing glass tube method, so that the femtosecond laser damage threshold of the fiber boundary is improved, the writing area of the fiber grating is increased, and even the modulation area introduced by the femtosecond laser can cross the two areas of the fiber and the glass tube, so that the fiber grating covering the whole cross section of the fiber is prepared. Meanwhile, the refractive index of the glass tube is close to that of the coating, so that the mode deformation and loss are not caused.

The application provides a carbon fiber coating method for a three-dimensional printing carbon fiber composite material surface, through simultaneously coating a metal net and a carbon fiber cloth layer on the three-dimensional printing carbon fiber composite material surface, and adding a process step of a separation film and vacuum compression, the mechanical properties and the heat conduction properties of the coated part are obviously improved, so that the working load and the service life of the part can be greatly improved, and the part surface also plays a decorative role, has the characteristics of simple preparation process, low manufacturing cost and the like, and has high implementability in industrialized production, has great market potential and broad application prospect, and plays an important role in popularization and application of carbon fiber composite materials in robot lightweight.

The present invention relates to the field of carbon fiber technology, specifically to an automatic coating device for quick-drying glue on the surface of carbon fiber, comprising a workbench, a protrusion is integrally formed on one side of the top outer wall of the workbench, and a rack is installed on one side of the top outer wall of the protrusion by bolts, a slide rail is installed on one side of the top outer wall of the protrusion by bolts, and a slide plate is slidably connected to the outside of the slide rail, a fixed seat is installed on one side of the top outer wall of the slide plate by bolts, and a connecting pipe is installed inside the fixed seat by bolts, a barrel is installed on one end of the connecting pipe by bolts, and a protective shell is installed on the outer wall of the barrel side by bolts. Beneficial effects of the present invention When the device is used for coating, the motor can make the gear rotate and move on the rack, so that the slide plate moves on the slide rail, so that the pulley can coat the quick-drying glue on the carbon fiber, thereby improving the efficiency of carbon fiber coating, and the handle is turned to rotate the screw rod, so that the two baffle plates slide inside the slide groove, thereby adjusting the amount of quick-drying glue flowing out of the barrel.

The utility model relates to an ultra-high molecular weight polyethylene fiber coating device, which comprises a treatment box, an ultrasonic nebulizer, a conveying roller, an ultrasonic vibration rod and an extrusion roller, an inlet and an outlet are respectively arranged at the front end and the rear end of the treatment box, the conveying roller is arranged outside the treatment box, and the position close to the inlet is used for conveying ultra-high molecular weight polyethylene fibers; the extrusion roller is arranged outside the treatment box and close to the outlet, and the extrusion roller is used for extruding redundant coating liquid on the ultra-high molecular weight polyethylene fiber; the ultrasonic nebulizer is arranged above the treatment box, and a spraying head of the ultrasonic nebulizer faces the interior of the treatment box; and the ultrasonic vibration rod is arranged in the treatment box and is correspondingly arranged below the spray head of the ultrasonic atomizer. According to the utility model, by adopting the design of ultrasonic atomization spraying, the resource waste and the energy cost in the coating process are reduced; and secondly, the ultrasonic vibration rod is arranged, so that the ultra-high molecular weight polyethylene fiber is more favorable for being fully combined with the coating, and the coating effect of the coating is improved.

An optical fiber includes a glass structure to guide light along a longitudinal axis of the optical fiber, and an amorphous coating disposed on and surrounding the glass structure. The amorphous coating includes at least one fluorinated polyimide. A repeating unit each fluorinated polyimide includes two imide groups and at least one fluorinated aliphatic spacer group. Each imide group is attached to a terminus of a fluorinated aromatic group. The amorphous coating has a low refractive index, high-temperature stability, and low optical absorption, making the optical fiber suitable for high-power applications subject to high temperatures. The amorphous quality of the coating is compatible with fiber drawing and provides the necessary mechanical strength for the optical fiber when in use.

The invention provides a diaphragm as well as a preparation method and application thereof, the diaphragm comprises a base material and a coating, and the base material comprises polyolefin; the coating is arranged on at least one surface of the base material, and the coating comprises polar group grafted aramid fibers. According to the diaphragm disclosed by the invention, the polar group grafted aramid fiber coating is arranged on the polyolefin base material, so that the functions of rapid transmission and uniform distribution of ions can be regulated and controlled by virtue of excellent thermal stability of the polar group grafted aramid fiber coating; and the cycling stability and safety of electrochemical devices such as batteries and the like at high magnification and high temperature can be realized.

The utility model discloses a pressure regulating mechanism of a conductive fiber coating machine, which comprises a coating rack, an upper coating roller and a lower coating roller, the two ends of the upper coating roller are connected with regulating arms, and the regulating arms penetrate through vertical sliding chutes formed in the top of the rack; a pressing plate is arranged at the upper end of the adjusting arm and provided with an adjusting screw rod, and the adjusting screw rod makes contact with the pressing plate. The adjusting screw rod is connected with a worm gear, the worm gear is meshed with a worm, the worm is connected with a manual knob and fixed to the top of the rack through a ratchet mechanism, and the signal output end of the pressure sensor is connected to a display screen on the outer side of the rack and used for displaying the pressure value in real time. According to the utility model, high-precision pressure regulation is realized through worm and gear transmission, and real-time monitoring is realized by combining the pressure sensor and the display screen; an anti-reverse ratchet mechanism and a limiting assembly enhance the stability, and a silica gel damping layer effectively absorbs vibration; and the anti-skid rotary knob simplifies operation, the adjusting efficiency is improved, the overall structure integrates precision, stability and convenience, and the coating quality and the production efficiency are remarkably improved.