336 results about "Fiber spinning" patented technology

The invention discloses a wool type fiber spinning process precise control system and method, and relates to the technical field of fiber materials.According to the method, a perturbation gas injection groove is introduced into a spinning hole side structure, and gas injection parameters are collected in real time in combination with an MEMS micro-thermal film flow meter, a binocular infrared imager and other equipment; standardized preprocessing and feature extraction are carried out on gas injection data through a central control server, the directional deflection Odev can be accurately calculated, dynamic comparison and evaluation are carried out according to a deflection interval threshold value, and therefore the active regulation and control capacity on the initial deflection angle and the curling direction of fibers is achieved. Different from a traditional spinning process that fiber deflection completely depends on a mold, temperature or subsequent drafting disturbance, the method can construct a stable disturbance induction force field at the moment of fiber ejection, it is ensured that a fiber nascent path has consistency, directivity and predictability, and controllable guide conditions are provided for subsequent wool type structure construction.

The invention relates to the technical field of high-performance polymer material processing, in particular to a high-strength and high-modulus polyethylene fiber spinneret plate forming system and method.The system comprises a melt state monitoring module, a dynamic rheological coordination module, a micro-flow field reconstruction module, a molecular chain orientation module and an extrusion stabilization module; wherein the melt state monitoring module is used for acquiring an orientation degree real-time value and a pressure fluctuation value of a melt at an inlet of a spinneret plate; the dynamic rheological coordination module is used for generating a shear rate adjusting instruction and a pressure compensation instruction; the micro-flow field reconstruction module responds to the instruction and outputs a melt meeting a preset shear distribution condition; and the molecular chain orientation module is used for generating an axial stretching flow field in the convergence flow channel. According to the invention, through a melt state driven multistage flow field regulation and control and chain segment orientation control mechanism, the cooperative guarantee of orientation degree improvement and extrusion stability in the high-strength and high-modulus polyethylene fiber spinning process is realized.

The invention relates to the technical field of fiber production process simulation modeling, in particular to a Lyocell fiber spinning pulp porridge process simulation and quality prediction method and system.The method comprises the following steps that a simulation system is used for simulating the swelling process of cellulose in an NMMO solvent, and multiple sets of input and output data pairs are generated to construct a data set; a physical model of a simulation system is introduced into the gradient boosting tree algorithm to serve as regularization constraint, and an improved gradient boosting tree algorithm is obtained; and training an improved gradient boosting tree algorithm by using the data set to predict the quality of the Lyocell fiber spinning pulp porridge. According to the method, a slurry porridge quality prediction scheme based on simulation data and the improved gradient boosting tree algorithm is put forward for the first time, the slurry porridge research and development time and cost are greatly reduced, the improved gradient boosting tree algorithm integrates a physical model of a simulation system into a model training process by adding a physical constraint regularization item into a loss function, and the development efficiency of the slurry porridge is improved. The scientificity of a prediction result is enhanced, and the reliability of industrial application of the model is improved.

A preparation method of the blended modified antifibrillated lyocell fiber comprises three steps as follows: S1, a fibroin raw material and a cellulose raw material are dissolved in different NMMO / water mixed solvents respectively, and a fibroin solution and a cellulose solution are obtained; s2, transferring the fibroin solution and the cellulose solution into a reaction kettle, adding a modifier, vacuumizing to remove oxygen, heating to 50-85 DEG C, and stirring to react to obtain a composite spinning solution; the modifier is a small molecular compound containing an epoxy group or an oxygen-containing heterocyclic ring; s3, the composite spinning solution is extruded through a spinneret plate, fiber forming is conducted through a coagulating bath, drafting and winding are conducted, and the blending modified antifibrillated lyocell fiber is prepared. According to the invention, through in-situ modification of the lyocell fiber spinning solution, the prepared lyocell fiber has the intrinsic antifibrillation capability, the addition of an after-finishing process for treatment is not needed, meanwhile, the mechanical property of the fiber is improved, and the fiber is endowed with better skin-friendly property and wearing comfort.

The invention provides a multifunctional polyester yarn production system and an intelligent regulation and control method thereof, and relates to the field of chemical fiber spinning engineering. Comprising a multi-source sensing module, the multi-source sensing module carries out real-time acquisition processing on a multi-physics coupling process state set to form process state basic data, and the acquisition processing adopts a multi-type sensing device. And the depth inference processing module is used for carrying out space-time coupling inference processing on the process state basic data to form a process state recognition result. According to the multifunctional polyester yarn production system, through real-time acquisition and depth inference processing of multi-physical field data by the multi-source sensing module, accurate identification and prediction of a process state in a production process are realized. According to the multifunctional polyester yarn production system and the intelligent regulation and control method thereof, a space-time joint prediction model is used, the space-time joint prediction model comprises a graph convolutional network and a long-short-term memory network, space and time characteristics in data are fully mined, and the accuracy of process state recognition is improved.

To provide a synthetic resin canvas (and a method for producing the same) having cotton canvas appearance, stable in balance of warp and weft dimensions, and hardly causing dimensional change.SOLUTION: A synthetic-resin canvas having a mass of 360 to 800g / m2, the synthetic-resin canvas being obtained by providing a soft vinyl chloride-resin-impregnated coating layer on an entire surface of a fabric, wherein the fabric is a plain weave fabric, a twill weave fabric, or a satin weave fabric, and a 10% tensile stress in a widthwise direction of the synthetic-resin canvas is 90 to 110% of a 10% tensile stress in a processing direction. Especially, the fabric is composed of a short fiber spun yarn, a combination of a short fiber spun yarn and a long fiber multifilament bulky yarn, or a long fiber multifilament bulky yarn, and the difference between the total fineness per inch (dtex / inch) of the weft yarn group and the total fineness per inch (dtex / inch) of the warp yarn group is within ± 10%.SELECTED DRAWING: None

Recycling wind turbine blades includes shredding, crushing, and milling the wind turbine blades to yield a multiplicity of particles including glass fiber and sieving the particles to yield a multiplicity of pellets including glass fibers. Manufacturing a composite coaxial fiber includes providing a first, second, and third polymer composition to yield a composite coaxial fiber precursor, processing the composite coaxial fiber precursor to yield a coagulated composite coaxial fiber precursor, drawing the coagulated composite coaxial fiber precursor, and heating the drawn coagulated composite coaxial fiber precursor to yield the composite coaxial fiber. The second polymer composition can include the recycled glass fibers. The resulting composite coaxial fiber includes an inner and outer layer including polyacrylonitrile and a middle layer between the inner layer and the outer layer. The middle layer includes polyacrylonitrile and a multiplicity of the recycled glass fibers.

The invention provides production equipment and a production process for polyester fibers special for sportswear, and relates to the technical field of fiber spinning. The special polyester fiber production equipment for the sportswear comprises a feeding device, a spinning box body, a spinneret plate, a water cooling device, a circular blowing cooling device, an oiling device and a winding device. According to the invention, a spiral groove fiber structure is formed through rotary spinning, the moisture conduction efficiency is enhanced by utilizing the capillary effect of the spiral groove, and a traditional after-treatment moisture absorption and sweat releasing auxiliary agent is replaced, so that the problem of function attenuation caused by washing is fundamentally solved, and the problem of poor moisture absorption and heat conduction efficiency of a straight groove is solved; a heat insulation shell and water cooling structure collaborative design is adopted, a heat insulation rotating roller blocks spinning high-temperature conduction, a heat exchange coil pipe directly cools the operation environment of a servo motor, the stability of a driving system under the high-temperature working condition is guaranteed through double protection, and therefore it is guaranteed that a rotating pipe accurately controls the fiber groove forming quality.

The invention discloses a polyester staple fiber spinning on-line detection system and method based on machine vision. The system comprises a pneumatic optical constraint assembly, an imaging assembly and a processing unit. The pneumatic optical constraint assembly is integrated with a Venturi flow channel and a back plate with an inclined stripe background; the imaging assembly obtains image data of the tows constrained by the venturi flow channel. The processing unit calculates a vertical gradient component and a gradient direction, and generates a first feature map marking a defect area by calculating a difference value between the gradient direction and a stripe background extension direction; and weighting the vertical gradient component by using the first feature map, executing projection integral operation in a direction vertical to the motion direction of the tow to offset the gradient component of the stripe background, and calculating and outputting tow width data according to a projection curve generated by integral. According to the method, transparent defect detection and tow width measurement are simultaneously realized in a single-frame image through cooperation of fluid dynamic constraint and an integral cancellation algorithm.

Provided is a liquid crystalline polyester fiber capable of achieving improved weatherability without kneading a UV absorber into the fiber or attaching a weatherable UV absorber after fiber spinning. The liquid crystalline polyester is a fiber that consists essentially only of a liquid crystalline polyester, in which the amount of UV absorber used is 5 mass % or less, and the strength retention in the weather fastness test with xenon arc lamp light in accordance with JIS L 0891 is 60% or more.

The invention discloses automatic spinning cooling equipment, relates to the technical field of textile processing, and aims to solve the technical problems that existing spinning cooling equipment depends on manual carrying of a cooling device, the temperature control precision is poor, the cooling effect is unstable, and the operation efficiency is low. Automatic movement of the cooling device is achieved through lead screw transmission, manual carrying is replaced, the labor cost is reduced, and the operation efficiency is improved; precise temperature control is achieved by means of a temperature sensor and a cooling mechanism, and the multi-process requirements of melt spinning, solution spinning and the like are met; the spinning cooling uniformity is guaranteed through the design of the double flow guide pipes and the opposite side air blowing mechanism; the arc-shaped bent pipe solves the problem of spinning transition deformation, multi-device collaboration is improved, finally, the quality of spinning products is effectively improved, and the device is suitable for the chemical fiber spinning cooling process.

The utility model relates to the technical field of polyester staple fiber spinning oil injection, and discloses a low-melting-point polyester staple fiber spinning oil injection device. The device comprises a base, an equipment box is fixedly installed at the top of the base, a feeding port is formed in the surface of the equipment box, an oil storage tank is fixedly installed at the top of the equipment box, a first motor is fixedly installed at the top of the oil storage tank, and two rotating columns are rotationally installed in the oil storage tank; a plurality of stirring fan blades are fixedly connected to the two rotating columns, the first motor is in transmission connection with the two rotating columns, and two oil sprayers are slidably mounted in the equipment box. When the device sprays oil to fibers, oil can be uniformly sprayed on the surfaces of the fibers, and the softness, antistatic property and the like of the fibers are improved, so that the quality of finished fibers is improved, the production efficiency is improved, the waste and loss of the oil can be reduced, and the production cost is saved.

The utility model discloses composite simulated fur fiber spinning equipment, and relates to the field of polyester filament yarn production.According to the composite simulated fur fiber spinning equipment, a first raw material is metered into a first raw material and a second raw material with different deniers through two metering pumps in a feeding mechanism, the first raw material enters a first cavity through a pipeline and then is sprayed out through a first spinning part at the bottom of the first cavity, and the second raw material enters a second cavity through a pipeline; a second raw material enters a second cavity through the other pipeline and then is sprayed out through a second spinning part at the bottom of the second cavity, meanwhile, a second raw material is sprayed out through the other feeding mechanism, and due to the fact that the component sections of the first spinning part and the second spinning part are different, the denier sections of the sprayed first raw material and the second raw material are different. According to the utility model, two different denier cross sections can be sprayed in one material distributing assembly, so that the technical problem that the existing fiber manufacturing equipment cannot manufacture various different denier cross section fibers in the production process at the same time is solved, and the technical effect that the various different denier cross section fibers can be manufactured in the production process at the same time is achieved.

The application provides a method and device for preparing oriented nanofiber membranes, which comprises the following steps: freezing polymer nanofibers with liquid nitrogen; sticking a substrate for preparing nanofiber membranes on the inner wall of a closed container of a device for preparing oriented nanofiber membranes; placing the frozen polymer nanofibers in the closed container and rotating at high speed; and finally taking off the substrate on the inner wall of the closed container, and the surface of the substrate is uniformly compounded with oriented polymer nanofibers, thus obtaining the oriented nanofiber membranes. The device for preparing oriented nanofiber membranes has a rotating component rotating at high speed, and under the action of high-speed shearing force, the device can realize the directional selection of nanofibers and apply centrifugal force to the fibers, so that the fibers are oriented and compounded with the substrate. The application can be applied to different polymer nanofiber materials, realizes the separation of fiber spinning and orientation process, overcomes the dependence of traditional methods for preparing oriented fiber membranes on electrospinning technology, realizes dry film forming technology, and has great application prospect.

The high-elasticity semi-dull POY polyester fiber spinning equipment comprises a crane, an equipment body, a power piece, a silk yarn, a limiting piece, a winding rod, a worm, a worm wheel, a rotating plate, a moving block, an abutting plate, a switching plate, a threaded rod and a movable plate, the power piece is started to drive the winding rod to rotate, and under the action of the limiting piece, the winding rod is driven to rotate by the rotating plate. The worm, the worm gear and the movable plate are driven to reciprocate, so that the silk yarn is uniformly wound on the winding rod, the worm and the worm gear rotate on the movable block, the threaded rod synchronously doing reciprocating motion rotates at small angles at intervals, the movable plate moves away from the winding rod at intervals, and the situation that the winding thickness of the silk yarn on the winding rod is gradually increased is avoided. The wound silk yarn is in contact with the movable plate; and the pressing plate reciprocates to press the silk thread, so that on one hand, the reciprocating motion of the movable plate is ensured, the silk thread is uniformly wound, and on the other hand, the winding angle of the silk thread on the winding rod is further ensured.

The present application relates to the technical field of ultra-fine denier fiber spinning, and particularly relates to an ultra-fine denier acrylic high-count pure spinning yarn and a preparation method thereof, comprising (1) a picking process; (2) a doubling process; (3) a roving process; (4) a spinning process; and (5) a winding process; wherein the picking process is sequentially performed in a disc grabber, a multi-warehouse cotton mixer, an opening and cleaning machine, a cotton box and a carding machine, and a spraying device is additionally installed at the rear of the beater of the disc grabber; and the opening and cleaning machine adopts a carding needle type beater. The present application improves the picking process in the preparation method of the ultra-fine denier acrylic high-count pure spinning yarn, reduces the static electricity accumulation of the ultra-fine denier acrylic high-count pure spinning yarn in the spinning process, avoids the fiber damage of the ultra-fine denier acrylic fiber caused by single strength, and improves the spinnability of the ultra-fine denier acrylic fiber.

The utility model discloses a condensation tank device for chemical fiber spinning, which is mounted at the highest position of a heating system of chemical fiber spinning equipment and comprises a tank support, a condensation tank mounted on the tank support in a suspended manner, and a pressure gauge and a platinum resistor which are mounted on the condensation tank, the condensation tank comprises a first plug, a tank body and a second plug which are coaxially arranged from top to bottom, the first plug and the second plug are connected to the upper end and the lower end of the tank body respectively and form a condensation space with the tank body, an air inlet pipe is connected to the tank body in an inserted mode, an exhaust pipe is connected to the first plug in an inserted mode, and a backflow pipe is connected to the second plug in an inserted mode; the pressure gauge is mounted on the first plug, avoids the exhaust pipe and is used for measuring the pressure in the condensation tank; the platinum resistor is mounted on the second plug and is used for measuring the temperature in the condensation tank; the heating system of the chemical fiber spinning equipment is subjected to temperature monitoring and pressure monitoring, pressure fluctuation is buffered, and the operation stability is improved.

The invention relates to the technical field of spinning processes, and discloses polylactic acid fiber spinning equipment which comprises an extrusion box, a cooling box is arranged on one side of the extrusion box, an oil coating box is arranged on the side, away from the extrusion box, of the cooling box, an oil storage chamber is fixedly installed on the upper portion of the interior of the oil coating box, and a feeding pipe fixedly communicates with the upper portion of the oil storage chamber. A stirring assembly for uniformly stirring an oil agent is arranged in the oil storage chamber, an oil coating assembly is arranged below the oil storage chamber, the oil coating assembly comprises an oleophylic sponge which can be extruded to deform, a circular inner groove is formed in the center of the inner wall of the oleophylic sponge, and when the oleophylic sponge is extruded, the oil agent uniformly permeates out from all directions of the inner groove; the oiling agent can wrap the fiber in all directions, the problem that local oiling is insufficient or excessive possibly occurring in a traditional oiling mode is solved, and it is guaranteed that each position of the surface of the fiber can be evenly coated with the oiling agent.

The utility model relates to the field of fiber spinning web production, in particular to a dyeing device for fiber spinning web production. The utility model provides the dyeing device for producing the fiber spinning net, which can be used for carrying out double-sided dyeing on the fiber spinning net, improving the dyeing quality of the fiber spinning net, improving the dyeing efficiency of the fiber spinning net and improving the production efficiency of the fiber spinning net. A fiber spinning net production dyeing device comprises a supporting frame, first motors, lead screws and the like, the five first motors are connected to the lower side of the front portion of the supporting frame, and the five lead screws are rotationally connected to the upper side of the front portion of the supporting frame. Dye liquor is sucked into the connecting pipe through the water pump and flows into the collecting boxes in the first spraying pipe and the second spraying pipe, then the dye liquor is sprayed out through the first spraying pipe and the second spraying pipe to dye the fiber spinning net, and therefore double-face dyeing can be conducted on the fiber spinning net, and the dyeing quality of the fiber spinning net is improved; the dyeing efficiency of the fiber spinning net is improved, and the production efficiency of the fiber spinning net is improved.

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.

This invention relates to the field of functional fiber technology, specifically to a method for preparing polyester staple fibers with deodorizing and antibacterial functions. The method includes preparing hydroxyl-loaded polyester masterbatch, preparing polyester fibers and grafting them, and post-treatment. This invention prepares hydroxyl-rich polyester masterbatch by adding high-temperature resistant hydroxyl-rich nanoparticles to polyester powder, and then adds the hydroxyl-rich polyester masterbatch to the spinning of polyester staple fibers. This increases the number of active hydroxyl groups on the surface of the polyester fibers, solving the problem that polyester itself does not have active groups and cannot be directly grafted onto the surface of pure polyester fibers. The active hydroxyl groups of modified cyclodextrin undergo nucleation and addition reactions with isocyanate groups, replacing high-temperature esterification and radiation crosslinking reactions, resulting in low energy consumption and environmental friendliness. The desealing temperature of the water-based end-capped polyisocyanate is consistent with the drying and relaxation setting temperatures in polyester staple fiber production, triggering the nucleation and addition reaction and solving the problem of side reactions caused by excessively active isocyanate groups.

The utility model relates to the technical field of chemical fiber spinning, and discloses an annular blowing air box capable of adjusting the height of a windless area, which comprises an air box, the air box is connected with an air conditioning pipe, a plurality of vertically arranged annular blowing cylinders are fixed in the air box, and a plurality of radially penetrating air holes are formed in the annular blowing cylinders; the outer wall of the upper end of the annular air blowing cylinder is sleeved with a wind shielding rubber sleeve, the wind shielding rubber sleeve and the annular air blowing cylinder are relatively fixed through friction resistance, the height of the wind shielding rubber sleeve is of various specifications, and the wind shielding rubber sleeve can be subjected to thermoplastic forming through a winding film. The height of the windless area can be adjusted by replacing the windshield rubber sleeves with different heights, so that the spinning process requirements of different yarns can be met; the wind shielding rubber sleeve can be preformed or formed through thermoplastic forming of a wrapping film, material taking is convenient, and operation is easy, convenient and flexible.

The utility model provides a coagulating bath buffering and flow stabilizing device for hollow fiber spinning, and relates to the field of spinning equipment.The coagulating bath buffering and flow stabilizing device comprises a recycling plate and a pore plate, the recycling plate is arranged on a coagulating bath tank, and the recycling plate is provided with an entering position facing the coagulating bath tank; the two pore plates are oppositely arranged at the two ends of the recovery plate in the first direction, and the first direction is the length direction of the coagulating bath tank; the upper part of the pore plate is connected with the recycling plate, the bottom end of the pore plate extends into the coagulating bath tank, the width of the pore plate is matched with that of the coagulating bath tank, and a plurality of round holes are uniformly distributed on the pore plate. The coagulating bath liquid impacts the pore plate, after energy is dispersed, the liquid can enter the area below the spinneret plate through the round holes, at the moment, flowing of the liquid is more uniform, the chemical potential difference of the coagulating bath at different moments tends to be stable, and then the fiber forming stability is improved.

The utility model discloses a polyethylene fiber spinning cooling bath which comprises a bath body, a main machine body is installed at the upper end of the bath body, when a heat dissipation mesh plate is installed, a baffle is controlled to rotate through a bolt column A, the baffle is rotated to the position of the inner side of the heat dissipation mesh plate, and the heat dissipation mesh plate is cooled through the main machine body. At the moment, a heat dissipation mesh plate is inserted into the groove body, when a protruding plate is attached to the outer wall of the groove body, insertion is completed, a bolt column A is rotated to rotate a baffle to the outer side, a bolt column B is rotated to rotate on the inner side of a threaded cylinder, and when the baffle is attached to the inner wall of the groove body, rotation of the bolt column B is completed; the nut is rotated to rotate at the secondary position of the bolt column A, when the nut is attached to the outer side of the threaded cylinder, installation of the groove body and the heat dissipation mesh plate is completed, rapid installation and disassembly can be achieved through the connecting mode, and tools are not needed during operation.

The utility model relates to spinning production technical field discloses a yarn spraying device for biomass fiber spinning production, the conveying assembly is by first guide roller, second guide roller, first fixed body, threaded rod, first bevel gear, threaded bushing, motor, second bevel gear, third guide roller, second fixed body, slide rod, slide bushing constitutes, the first guide roller rotatory installation is in the inside of water storage tank, the second guide roller rotatory installation is in the inside of water storage tank, the first fixed body fixed mounting is in the inside of water storage tank. The yarn spraying device for biomass fiber spinning production is through starting motor, under the action of first bevel gear and second bevel gear, can drive threaded rod rotation, can drive threaded bushing removal, under the action of the guide unit that slide rod and slide bushing constitute, can drive third guide roller up and down removal, can adjust the distance between second guide roller and third guide roller according to the thickness of yarn, ensure the stability of yarn delivery.

Annular burner (10) for internal centrifugal fiber spinning of glass fibers, comprising a combustion chamber (12), a combustion chamber casing (14), an ejection nozzle (18) and a fuel and oxidizer supply system (20) to the combustion chamber (12) in gaseous state, the fuel comprising dihydrogen and the oxidizer comprising dioxygen, the supply system (20) comprising a plurality of injectors (22) distributed around the combustion chamber (12) and opening into the combustion chamber (12) and a fuel distribution ring (24) into the injectors (22), the fuel distribution ring (24) comprising a fuel inlet conduit (26) into the fuel distribution ring (24) and the distribution ring (24) forming with the casing (14) a fuel distribution chamber (28),the fuel distribution chamber (28) being in direct fluidic communication with at least two injectors (22) of the plurality of injectors. Figure for the abbreviation: Fig. 1,

The utility model relates to a bast fiber spinning yarn waxing mechanism, which belongs to the technical field of spinning equipment and comprises a wax containing bin and a wax injection pipe mounted on the wax containing bin. A processing piece for yarn guiding processing is arranged on the wax containing bin; the processing part comprises a plurality of supporting blocks fixedly connected to the upper portion of one side of the wax containing bin, a plurality of supporting rods are fixedly connected to the upper portion of one side of the wax containing bin, every two supporting rods form a group, each group of supporting rods is slidably connected with a pressing block covering the corresponding supporting block, and supporting springs are fixedly connected between the pressing blocks and the wax containing bin. According to the bast fiber spinning yarn waxing mechanism, redundant wax liquid generated when yarn passes through the wax scraping blocks on the upper side and the lower side can be scraped through the wax scraping blocks on the supporting block and the pressing block, the scraped wax liquid can be guided back into the wax containing bin through the wax guiding plate, and fluff and dust on the surface of the yarn before waxing can be cleaned through bristles in the cleaning ring; therefore, the yarn waxing effect is improved.

The invention discloses a method for efficiently preparing a nylon 6 micro-nano fiber antibacterial air filtering membrane material, which comprises the following steps: etching porous ceramic microspheres, mixing with a non-polar material solution, coating, drying, and injecting charges to obtain electret microspheres; mixing an antibacterial substance solution with the electret microspheres in the step S1, and drying to obtain antibacterial-electret microspheres; meanwhile, spinning a bottom layer of the filtering membrane by using a crude fiber spinning solution and a fine fiber spinning solution through blowing spinning; adding a crude fiber spinning solution and antibacterial-electret microspheres into a cross-linking agent for mixing and spraying to form a middle layer with the surface of the bottom layer; repeating bottom layer operation and spraying again to form a top layer with the middle layer to obtain the filtering membrane with a multi-layer structure; carrying out hot press molding on the filtering membrane with the multi-layer structure; the dynamic interaction between a flow field and particles is enhanced, so that fine particles are more easily adsorbed or intercepted by the fiber surface, and efficient filtration is realized.

The utility model relates to the technical field of chemical fiber spinning equipment, in particular to a quick-changing device for a para-aramid spinneret plate assembly. The device comprises an assembly shell, a spinneret plate assembly, a connecting piece and an end cover which are connected in sequence, wherein the spinneret plate assembly is embedded in the assembly shell; the connecting piece comprises a positioning base face and a connecting boss, the positioning base face is inserted into the upper end of the assembly shell in a sealed mode through an inserting part, and a clamping groove is formed in the outer side face of the connecting boss. A connecting groove matched with the connecting boss is formed in the end cover, a clamping block protruding in the radial direction is arranged at the bottom of the side face of the connecting groove, and the connecting piece and the end cover are clamped and fixed through the clamping block and the clamping groove. Modularization of core components of the spinneret plate assembly is achieved, a clamping groove and clamping block connecting structure is adopted to replace a traditional thread structure, installation and replacement of the spinneret plate are simpler and faster, sealing performance is greatly improved, and production efficiency is improved.

The utility model relates to the technical field of shredding equipment, in particular to a chemical fiber equipment shredding machine which comprises a rack, a conveying assembly arranged in the middle of the top of the rack, a shell arranged on the rack at one end of the conveying assembly, a crankshaft connected to the shell through a bearing, a crank connected to the crankshaft, and a sliding seat hinged to the bottom of the crank. The sliding seat is arranged in the shell in a sliding mode, the cutting assembly is arranged at the bottom of the sliding seat, the extension plate is connected to one side of the conveying assembly, one side of the cutting assembly is matched with one side of the extension plate, the servo motor is arranged on one side of the shell, and an output shaft of the servo motor is connected with one end of the crankshaft. According to the device, through cooperation of the shell and the sliding seat, when the crankshaft drives the crank to move, the crank drives the sliding seat to move in the shell, the sliding seat drives the cutting assembly to move, the force applied by the cutting assembly to chemical fiber spinning in the cutting process is larger, and therefore the probability that cut filaments are not cut off is reduced; and the probability of wire winding on the transportation assembly is reduced.