238results about "Spinning head liquid feeder" patented technology

The invention belongs to the field of high-performance materials, and discloses a high-thermal-conductivity PBO fiber and a preparation method thereof, and the preparation method comprises the following steps: (1) preparing a PBO polymer solution with a conventional molecular weight; (2) preparing an ultra-high molecular weight PBO polymer solution; (3) mixing the two PBO polymer solutions in a double-screw extruder according to a certain proportion to obtain a PBO spinning solution; (4) preparing as-spun PBO fibers by adopting a dry-wet liquid crystal spinning process and a condensed state structure regulation and control means; and (5) washing, drying, oiling and winding the as-spun PBO fiber to obtain the high-thermal-conductivity PBO fiber. According to the method, a small amount of the ultra-high molecular weight PBO polymer is added into the conventional spinning solution, the heat conduction performance of the PBO fiber is remarkably improved through the induced orientation crystallization effect of an ultra-high molecular weight PBO long chain, and the method has good application prospects in the field of high-power radio frequency microwave circuits with high requirements for heat dissipation capacity.

The invention discloses an integrated rheology detection and automatic control method and device. The method comprises the following steps: S1, acquiring a viscosity detection value of slurry; s2, the viscosity detection value of the slurry is compared with a viscosity set value, if the viscosity difference value exceeds a set range, the viscosity is dynamically adjusted through a pre-established logic control model, and the logic control model is used for adjusting the viscosity difference value within the set range by adjusting model factors related to the viscosity; the model factors include a temperature factor and a pressure factor associated with viscosity. The temperature, the pressure and the rotating speed are dynamically adjusted through the logic control model, so that the viscosity is adjusted; through multi-parameter cooperative control, the rheological fluctuation amplitude of the slurry can be greatly reduced, the consistency of the slurry is improved, and the spinning spinnability and the strength uniformity of tows are improved.

The utility model belongs to the technical field of spinning, and discloses a spinning device based on liquid crystal polyarylate fibers, which comprises a support base, a screw conveyor positioned in the middle of the support base, and a mixing structure positioned above the screw conveyor, the mixing structure comprises two mounting frames mounted outside the screw conveyor, a stirring barrel mounted at the tops of the two mounting frames and a servo motor located below the stirring barrel, the mixing structure is matched with the screw conveyor, liquid crystal polyarylester fibers and corresponding additives are placed in the stirring barrel, and the liquid crystal polyarylester fibers and the corresponding additives are uniformly mixed. And then the servo motor is started to drive the meshing wheel A tightly connected with the servo motor to quickly and stably rotate, meanwhile, the meshing wheel A drives the meshing wheel B and the meshing wheel C to rotate, and in the high-speed rotation process of the meshing wheel A and the meshing wheel C, the outer rod and the inner rod which are connected with the meshing wheel A and the meshing wheel C can present the coaxial reverse rotation effect, so that strong and complex shearing force is generated.

The utility model discloses a melt filtering device meeting double-screw feeding, and relates to the technical field of non-woven fabrics, the melt filtering device meeting the double-screw feeding comprises a filter main body, one side of the filter main body is provided with two melt inlet and outlet seats, and the two melt inlet and outlet seats are arranged on the other side of the filter main body. Discharging switching valves are arranged at the front end and the rear end, close to the top end, of the melt inlet and outlet seat, and feeding switching valves are arranged at the front end and the rear end, close to the bottom end, of the melt inlet and outlet seat. The problems that in the prior art, part of slices in a large drying tower need to be blown to a small drying tower for secondary drying and heat preservation, then melt conveying is conducted through a small screw extruder and a small filter, the distance between the large melt filter and the small melt filter is long, temperature control cannot be completely consistent, and electric energy and heat energy losses are large are solved.

A meltblown system includes a die including a die inlet end to receive molten polymer from a polymer source, a cavity located downstream from the die inlet end through which the molten polymer flows, and a die outlet end to receive the molten polymer from the cavity and deliver to outlet orifices at the die outlet end. A fluid supply includes a channel that delivers fluid to the die outlet end to attenuate fibers formed from molten polymer emerging from the die outlet end. The fluid supply provides fluid at a temperature T2 that differs from a temperature T1 of the molten polymer within the cavity, and the meltblown system is configured to independently maintain the molten polymer within the cavity at the temperature T1 during operation of the meltblown system.

The utility model relates to the technical field of coating mechanisms, in particular to a supply coating mechanism of a nanofiber electrostatic spinning machine, which comprises a plurality of metering pumps, a plurality of liquid inlet pipes and an adjusting rotating mechanism, and the adjusting rotating mechanism comprises a rotating column, a rotating frame, a driving assembly, a plurality of coating blocks, a plurality of coating pipes, a plurality of dismounting assemblies and an auxiliary assembly. The rotating column and the driving assembly are installed in the electrostatic spinning machine, the number of the coating blocks is selected according to needs, the rotating frame is inserted, the multiple electrostatic spinning pieces are embedded into the multiple coating grooves respectively, the driving assembly is fixed and started through the multiple disassembling and assembling assemblies respectively, and under cooperation of the auxiliary assembly, the rotating frame rotates with the rotating column as a rotating shaft; the multiple coating blocks are driven to rotate, the multiple metering pumps are started, and polymer solutions are injected into the multiple coating grooves through the multiple liquid inlet pipes and the multiple coating pipes correspondingly, so that supply coating is conducted on multiple pieces of electrostatic spinning, and the effect of improving the adaptability of the mechanism is achieved.

The utility model discloses a spinning box for monofilament production, which comprises a box shell, a distribution mechanism, a plurality of spinning units and a heating medium mechanism, wherein a heating cavity is formed in the box shell, and the distribution mechanism, the spinning units and the heating medium mechanism are mounted on the box shell. The distribution mechanism comprises a total distribution head and a plurality of metering components which are mounted on the box shell, and a plurality of distribution passages which are communicated between the total distribution head and the plurality of metering components; the total distribution head is configured to uniformly distribute a melt extruded by the extrusion equipment to the plurality of metering components through the plurality of distribution passages; the plurality of spinning units are in one-to-one correspondence with the plurality of metering components, each spinning unit comprises a plurality of spinning ports for outputting the melt, and each metering component is configured to uniformly distribute the melt conveyed by the distribution passage to the plurality of spinning ports; the heating medium mechanism comprises a heating medium inlet pipe and a heating medium return pipe which are communicated with the heating cavity, and a plurality of electric heating rods arranged on the box shell in a penetrating manner; the multi-head filament spraying device can uniformly spray filaments in a multi-head mode and is suitable for production of monofilaments of different varieties.

The invention discloses a preparation method of ultra-high molecular weight polyethylene fiber, fiber and spinning equipment, and the preparation method comprises the following steps: (1) mixing ultra-high molecular weight polyethylene powder with a solvent, uniformly swelling, and feeding into a twin-screw extruder for fully dissolving to obtain a spinning solution; spraying the spinning solution through a spinneret plate, drafting in an air gap, and cooling in a cooling bath to obtain gel silk; (2) carrying out shrinkage balance on the gel silk; then carrying out pre-extraction and pre-drying to obtain gel filaments with low solvent concentration, and storing the gel filaments in a filament containing barrel for later use; and (3) sequentially carrying out multi-stage extraction, drying, multi-stage drafting and winding on the jelly silk with low solvent concentration to obtain the ultra-high molecular weight polyethylene fiber. Through the steps of shrinkage balance, pre-extraction and drying treatment on the gel silk, adverse effects caused by solvent precipitation and gel silk shrinkage in the standing process of the gel silk can be reduced, the fiber fineness can be controlled to be stable and uniform, the production process is short, the occupied area of equipment is small, and the investment is low.

The present application relates to the technical field of composite hollow fiber production control, in particular to a three-component composite hollow fiber low-resistance high-efficiency spinning system and control method, comprising the following steps: setting the target pressure value of each component; the core control unit delivers three-component melt to the composite spinning box; the pressure sensing module collects the instantaneous pressure value of the three melts at the spinneret inlet in real time; calculating the independent deviation of the instantaneous pressure value of each component melt from the target pressure value; calculating the difference between the instantaneous pressure values of the three-component melts, and identifying the maximum pressure difference; comparing the maximum pressure difference with the maximum pressure deviation threshold; superimposing the independent rotation speed compensation signal on the initial rotation speed setting value of each servo driver to adjust the rotation speed of each extrusion mechanism screw in real time. The present application effectively eliminates the problem of pressure mismatch caused by temperature fluctuations, screw disturbance or material viscosity changes.

Materials are provided that can be used for electromagnetic interference (EMI) shielding, and methods of fabricating the same and methods of using the same are also provided. Polymer-based fiber thin films can have superior electrical conductivity and excellent EMI shielding efficiency while being ultra-flexible and ultra-lightweight. The fiber thin films can be dual polymer thin films and can incorporate quantum dots (QDs) (e.g., magnetic quantum dots) and / or two-dimensional (2D) conductive nanomaterials within a dual polymer matrix comprising a conductive polymer and a nonconductive polymer. The resultant composite thin film can have low density, high porosity, and high electrical conductivity.

The invention relates to a method for producing spunbonded fabric (1), wherein a spinning material (2) is extruded through a plurality of nozzle holes (4) of at least one spinneret (3, 40, 50) in order to form filaments (5), and each of the filaments (5) is stretched in the extrusion direction, wherein the filaments (5) are laid on a perforated conveyor device (10) in order to form a spunbonded fabric (1), and the nozzle holes (4) of the spinneret (3, 40, 50) are arranged along a main axis (6) aligned in the transverse direction (12) relative to the conveyor direction (11) of the conveyor device (10) such that the spunbonded fabric (1) formed on the conveyor device (10) is stretched in said transverse direction (12). The aim of the invention is to allow a reliable adjustment of the spinning width and the weight distribution per surface unit of the spunbonded fabric or allow the weight distribution per surface unit to be kept constant during an ongoing operation using said method. This is achieved in that the spinning material throughput (31) of the nozzle holes (4) is variably set along the transverse direction (12).

The invention provides a spinning device. The spinning device comprises a feeding port, a screw extrusion assembly, a spinning box, a detachable temperature control assembly, a bearing plate and a winding assembly. The screw extrusion assembly is connected with the feeding port. The spinning box body is connected with the screw extrusion assembly. The detachable temperature control assembly is arranged below the spinning manifold body, and the ratio of the length of the spinning manifold body to the length of the detachable temperature control assembly is 1: 1-2.5. The bearing plate is fixed to one end of the spinning manifold and located between the spinning manifold and the detachable temperature control assembly. The winding assembly is coupled with the detachable temperature control assembly. According to the spinning device, production of the thermoplastic liquid crystal polymer fibers can be achieved more easily, the spinnability is improved, and the quality of the generated thermoplastic liquid crystal polymer fibers can also be improved.

The resin composition for melt spinning of the present invention is a filament having a melt viscosity of 250 Pa·s or less at 200° C. and a shear rate of 0.1 s−1 and a tensile strength of 10 MPa or more. The filament can be produced by forming a molten liquid of a resin composition having a melt viscosity of 250 Pa·s or less at 200° C. and a shear rate of 0.1 s−1 into a filament shape to provide a formed material, and conveying and concurrently cooling the formed material. The present invention also provides a resin composition for melt spinning being a filament, and a method for producing fiber using a melt spinning apparatus.

The present disclosure relates to a center fluid distributor for a multi-fiber spinneret for producing hollow fiber membranes in a phase inversion process.

The lightweight melt-blown hot-melt nonwoven fabric containing hydrophobic nanosilica according to the manufacturing method of the present invention performs an adhesive function when interposed between adherends such as fabric, even if a smaller amount of adhesive resin is applied than a conventional hot-melt film, it has the effect of saving material costs and energy by about 10 to 50% while ensuring uniformity of adhesive strength for each section, excellent peel strength, and good breathability. As a result, fabric products using the melt-blown hot-melt nonwoven fabric can prevent overflow during the adhesion process and achieve lightness and a soft texture.

Certain aspects of the disclosure concern a device including a nozzle configured to receive a heated polymer solution from a reservoir and a power supply configured to generate an electrostatic field between a tip portion of the nozzle and a substrate so as to draw a charged jet of the heated polymer solution out of the tip portion of the nozzle toward a substrate situated at an operating distance from the tip portion of the nozzle and form a polymer fiber on the substrate. The heated polymer solution is at an operating temperature that is greater than or equal to 40° C.

Materials are provided that can be used for electromagnetic interference (EMI) shielding, and methods of fabricating the same and methods of using the same are also provided. Polymer-based fiber thin films can have superior electrical conductivity and excellent EMI shielding efficiency while being ultra-flexible and ultra-lightweight. The fiber thin films can be dual polymer thin films and can incorporate quantum dots (QDs) (e.g., magnetic quantum dots) and / or two-dimensional (2D) conductive nanomaterials within a dual polymer matrix comprising a conductive polymer and a nonconductive polymer. The resultant composite thin film can have low density, high porosity, and high electrical conductivity.

The present disclosure relates to compositions, apparatus and methods for generating one or more scaffolds, including: mixing a hydrogel material and / or an extracellular matrix (ECM) protein in an aqueous solvent to generate an aqueous process solution; and cryoelectrospinning the aqueous process solution onto a plurality of conductive probes extending from a conductive surface of a collector plate disposed within a process chamber under conditions sufficient to generate one or more scaffolds configured to mimic a preselected soft tissue decellularized extracellular matrix. Scaffold compositions are also provided having preselected or tuned characteristics.

The invention discloses a method for preparing a PA6 / 56 bio-based copolyamide fiber through melt direct spinning, which comprises the following steps: mixing raw materials containing a caprolactam solution, a PA56 salt solution and a molecular weight regulator, preheating, carrying out prepolymerization reaction and polycondensation reaction to obtain a PA6 / 56 copolymer melt, and carrying out devolatilization to obtain a PA6 / 56 devolatilization melt; and carrying out melt spinning on the PA6 / 56 devolatilization melt to obtain the PA6 / 56 bio-based copolyamide fiber. According to the invention, bio-based 1, 5-pentamethylene diamine is adopted as a raw material of PA56, preheating and pre-polycondensation are firstly carried out after configuration, then polycondensation is carried out to further increase the number-average molecular weight of a nylon 6 prepolymer, and the obtained copolymer melt is in a molten state. Low polymers of the copolymer are removed through the devolatilization reactor, liquid phase extraction of PA6 / 56 is achieved, the extractable matter content of the obtained copolymer melt is smaller than or equal to 2 wt%, the technological process is simplified, and the production cycle, the equipment investment cost and the production energy consumption are greatly reduced.

This invention relates to polyamide flat yarns, polyamide container bags, and their preparation methods. The raw materials for production include at least polyamide resin, specifically one or more of polyamide 5X, polyamide 6X, polyamide 6, polyamide 5T / 5X, polyamide 5T / 66, and polyamide 6T / 66. X is selected from one or more of bisaccharide, sebacic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, and octadecanoic acid. This invention enables the preparation of polyamide flat yarns with higher tensile strength using polyamide resin as a raw material, thereby obtaining polyamide container bags with better tensile strength, dimensional stability, heat resistance, low-temperature resistance, and abrasion resistance.

This utility model discloses a high-efficiency raw material mixer for industrial filament production, comprising a base plate, a mixing drum, and a first motor. A connecting cover is provided on the mixing drum. A connecting rod is fixedly connected to the output end of the first motor. Multiple stirring rods are fixedly connected to the outer surface of the connecting rod. A discharge pipe is fixedly connected to the lower surface of the mixing drum. A first protective cover is threadedly connected to the outer surface of the discharge pipe. Two feed pipes are fixedly connected to the upper surface of the connecting cover. Each of the two feed pipes is threadedly connected to a second protective cover. This high-efficiency raw material mixer for industrial filament production, through its specific structure, can drive the mixing drum and stirring rods to rotate in opposite directions, thereby achieving the effect of the mixing drum's revolution and the stirring rods' rotation. This allows the raw materials to be subjected to the combined shear force of the stirring rods and the displacement caused by the rotation of the mixing drum, resulting in a more complex flow trajectory and improving mixing efficiency.

The present invention relates to a method for producing a carbon nanotube fiber aggregate and provides a carbon nanotube fiber aggregate having an improved level of alignment through ultrasonic wave application and low speed recovery.

The invention relates to a method for preparing polypropylene fibers by high-power stretching oriented crystallization, which comprises the following steps of: pretreating raw materials, melting, plasticizing and accurately metering, spinning and forming, and treating by using a three-section temperature control channel: enabling nascent fiber trickles to enter a temperature-controllable channel of a high-temperature slow cooling area, a medium-temperature oriented crystallization area and a low-temperature shaping area which are sequentially arranged from top to bottom; the areas are independently controlled in temperature and have a synergistic effect. According to the method disclosed by the invention, through coordinated regulation and control of three-section type temperature gradient and high-power stretching, a molecular chain is fully unwound and stretched in a high-temperature region firstly, and then is subjected to high-power stretching induction in an optimal crystallization temperature region to form a perfect crystal structure with high orientation, high crystallinity and narrow grain size distribution, so that high-strengthening structures such as shishkebab shish-kebab crystals and extended-chain crystals can be stably obtained; and the tensile strength and the initial modulus of the prepared polypropylene fiber are remarkably improved, the dry heat shrinkage rate is greatly reduced, the mechanical property and the dimensional stability are far superior to those of traditional process products, and the strict requirements of high-end industrial textiles are met.

The invention provides a preparation method of full-dull special-hole plying cotton-like fibers, which comprises the following specific steps: preparation of a dull master batch, mixing of a dull master batch melt and a polyester melt, spinning formation of a full-dull polyester melt, and winding and stretching formation of full-dull special-hole plying cotton-like POY fibers. Diversification of fiber sections and optimization of performance are achieved, the design simplifies the production process, the production efficiency is improved, and according to the method, through integrated design of a spinneret plate assembly, the precise online extinction master batch adding technology is adopted, and the steps of melt distribution and control, the synchronous spinning process, stretching, winding and the like are combined, so that the production efficiency is improved. According to the invention, the efficient and stable production of the blended cotton-like POY fiber is realized, and the prepared blended cotton-like POY fiber has excellent physical properties and processability, can be directly used in various processes and fields, and has wide market prospects and application values.

The present application relates to the technical field of processing environment-friendly fiber melt from waste and old textile fabrics and threads, and particularly relates to an environment-friendly waste thread melt homogenization system and a homogenization method, which comprises a homogenizer cylinder group, a film forming pipe group, a piston module and a power module, the piston module is sleeved outside the film forming pipe, when the piston module moves upwards along the film forming pipe, the environment-friendly waste thread solution flowing on the outer surface of the film forming pipe is scraped off, by arranging the piston module, the environment-friendly waste thread melt formed is scraped and concentrated by the piston module, and is transferred to the side wall of the chamber, and then flows again to form a film, heat exchange is carried out by using the heat in the heat insulation jacket, the film forming pipe is supplemented and lengthened, the environment-friendly waste thread melt in the chamber obtains heat exchange treatment with as long a path as possible, small molecule byproducts are separated, the waste thread melt in some parts does not flow, carbonization is avoided, and the homogenization quality and viscosity of the environment-friendly waste thread melt are improved.

The invention relates to the technical field of chemical fiber production equipment, and discloses a production device of flame-retardant anti-molten-drop chinlon 6 filaments, which comprises a production platform and a console arranged on the production platform, and further comprises a feeding assembly, the feeding assembly comprises a chinlon 6 slice feeding cylinder, a first-stage mixing assembly is arranged below the chinlon 6 slice feeding cylinder, and a second-stage mixing assembly is arranged below the first-stage mixing assembly. The tail end of the first-stage mixing assembly is connected with the second-stage mixing assembly, and the melting assembly is nested on the outer side of the first-stage mixing assembly. According to the device, a two-stage mixing structure of double-screw staggered shearing and planetary gear meshing shearing is adopted, accurate quantity control feeding is achieved through the metering screw, a global uniform shearing field is constructed, a mixing path is prolonged, the technical problems of flame retardant agglomeration and uneven mixing in traditional single-stage mixing are solved, and the flame retardant mixing efficiency is improved. According to the invention, the dispersion precision of the flame retardant in the melt is ensured to reach the required dispersion precision of filament molding, the spinneret orifice blockage and the linear density deviation are avoided through filter plate filtration and multi-stage parameter regulation and control, and the flame-retardant consistency and the molding qualification rate of the chinlon 6 filament are obviously improved.

The utility model relates to polyester spinning technology field especially a spinning device with the heat -conducting oil's heat energy reuse function, and glycol tank is connected the pipe course of glycol evaporator through the pipeline, the pipe course of glycol evaporator is connected to glycol flash tank through the pipeline, glycol flash tank is connected to vacuum injection system through the pipeline, and vacuum injection system is connected to final polymerization kettle, still include heat -conducting oil heat exchanger, and the shell side of glycol evaporator is connected to the pipe course of heat -conducting oil heat exchanger through the pipeline, still include heat -conducting oil total jar, and heat -conducting oil total jar is connected to the shell side of heat -conducting oil heat exchanger through the pipeline, and the shell side of heat -conducting oil heat exchanger is connected to melt cooler through the three -way valve, and heat -conducting oil total jar still is connected to three -way valve through the pipeline, and melt cooler is connected to heat -conducting oil total jar through the pipeline. The utility model reduces the energy consumption consumed to high temperature heat -conducting oil cooling, realizes the purpose of heat energy reuse and energy -conserving and consumption -reducing.

According to the present disclosure there is provided a method of depositing a fibre onto a freestanding object using a fibre deposition apparatus. The fibre deposition apparatus comprises a dispenser and a moveable arm defining a deposition zone. The method comprises: positioning the fibre deposition apparatus such that the freestanding object is located within the deposition zone, forming a droplet of a fibre-forming liquid composition at an outlet of the dispenser, moving the arm from a first position in contact with the droplet to a second position away from the first position so as to draw the droplet into a drawn fibre, and depositing the drawn fibre onto the freestanding object as the arm moves from the first position to the second position. According to a further aspect of the present disclosure there is provided a fibre deposition apparatus for depositing fibres onto a freestanding object. According to a further aspect of the present disclosure there is provided a liquid composition for forming a drawn fibre. The liquid composition comprises a fibre-forming polymer; a solvent; and a functional component.

The meltblown system includes a die including a die inlet end for receiving molten polymer from a polymer source, a cavity through which the molten polymer flows downstream of the die inlet end, and a die outlet end for receiving the molten polymer from the cavity and delivering the molten polymer to an outlet orifice of the die outlet end. The fluid supply includes a channel that delivers a fluid to the die outlet end to thin fibers formed from the molten polymer flowing out of the die outlet end. The fluid temperature T2 provided by the fluid supply is different from the temperature T1 of the molten polymer within the cavity, and the melt-blowing system is configured to independently maintain the molten polymer within the cavity at the temperature T1 during operation of the melt-blowing system.

The application discloses a special-shaped hygroscopic rapid-drying multifunctional fine-denier polyamide filament production device and method, relates to the polyamide production device technical field, and comprises a raw material extrusion assembly, the raw material extrusive assembly includes a fixed box, the fixed box is internally and fixedly connected with a pump shell, two meshing gears are rotatably connected in the pump shell, one of the gears is fixedly connected with the fixed box and is provided with a detection assembly, the lower end of the raw material extrusion assembly is provided with a transmission assembly for transmission and a replacement assembly for replacement, and a power-off assembly is fixedly connected to the side wall of the fixed box;The detection assembly comprises a fixed cylinder fixedly connected with the gear, and a rotating shaft is rotatably connected to one end of the fixed cylinder away from the gear, the pressure change of the spinning assembly and the discharge pipe when the device is blocked is utilized to change the torque when the gear rotates, and then the two spinning assemblies are replaced through the transmission assembly and the replacement assembly, so that the maintenance time of the spinning assembly by the staff is effectively shortened.