733 results about "Single filament" patented technology

The invention provides a warp-knitted interval sensing fabric and a preparation method and application thereof, a pressure sensor, a pressure sensing foot pad and a plantar pressure value acquisition system, and belongs to the technical field of flexible sensors. The warp-knitted interval sensing fabric comprises an electrode layer, a monofilament interval layer and a sensing layer which are sequentially laminated; the warp-knitted interval sensing fabric is of an integrally formed structure; the electrode layer is provided with a full-penetrating double-comb structure and comprises a plurality of conductive strips which are arranged in parallel, and an insulating strip is arranged between every two adjacent conductive strips; the monofilament spacing layer is formed by mutually connecting fiber coils, and the electrode layer and the sensing layer are connected through the fiber coils; the sensing layer has a full-penetration double-comb weave and is obtained by weaving sensing yarns. According to the warp-knitted spacer sensing fabric pressure sensor, the electrode layer, the monofilament spacer layer and the sensing layer are integrally formed, the process is simple, the cost is low, and large-scale production and practical application are facilitated.

The invention discloses monofilament prepreg yarn dry-method winding equipment and a tension control method, and relates to the technical field of composite material forming, the monofilament prepreg yarn dry-method winding equipment comprises an unwinding yarn box, a yarn roll is connected with a driving motor and used for outputting yarn, the yarn is wound on a hook leg buffer mechanism after being led out of the yarn roll, and the hook leg buffer mechanism is used for adjusting the tension of the yarn; a main shaft is rotatably arranged on the gantry frame in the length direction, and a mold is arranged on the main shaft; the moving trolley is in sliding connection with the gantry frame in the length direction of the gantry frame, the moving trolley is provided with a yarn winding nozzle, the yarn winding nozzle corresponds to the mold, and the yarn enters the yarn winding nozzle after being led out of the hook leg buffering mechanism and is wound on the mold. According to the invention, high-speed automatic winding of monofilament prepreg yarns can be realized, the automation degree is high, and the production efficiency is improved. The yarn tension output by each yarn roll is independently adjusted based on the tension after stranding, the control precision of the yarn tension is improved, the tension is kept stable, and therefore the yarn winding quality is improved.

The invention discloses a continuous fiber reinforced thermoplastic composite material and a preparation method thereof. The continuous fiber reinforced thermoplastic composite material comprises 35-40% of a polypropylene matrix with a melt index of 10-30 g / 10 min; 55% of continuous fibers are selected from glass fibers, carbon fibers or basalt fibers which are arranged in one direction, and the monofilament diameter is 9-15 microns; the intumescent flame retardant and the ammonium polyphosphate are compounded according to the mass ratio of 2: 1; 1-2% of an interface modifier, wherein a silane coupling agent KH-570 or PP-g-MAH is selected and used; the roughness Ra of the aluminum foil layer is 1.5-2.5 microns; under the condition of basically ensuring that the overall performance of the material is not greatly influenced, the application capability of the material is expanded, and the fireproof and flame-retardant capability of the material is improved, so that a thermoplastic composite material scheme can also be adopted under various harsh use conditions.

The invention relates to the technical field of fiber sizing treatment, and discloses an aramid fiber sizing device and method.The aramid fiber sizing device comprises a yarn unwinding device, a sizing tank, a yarn spreading and drying device and a winding device, the yarn spreading and drying device comprises a primary yarn spreading assembly, a drying roller and a secondary yarn spreading assembly, and the yarn spreading assembly comprises a first vibration roller, a conveying roller and a second vibration roller; the vibrating roller vibrates in the direction perpendicular to the fiber conveying direction. After being unreeled, fibers are sized through the sizing tank and fed into the yarn spreading and drying device to be subjected to wet broadening, mechanical damage to fiber bundles is reduced, and broken filaments are reduced. During primary yarn spreading, the vibrating roller vibrates at high frequency to enable fiber bundles to be dispersed and widened under the action of transverse friction force, extrusion mechanical damage of the fiber bundles is reduced, broken filaments are reduced, redundant size is removed, drying is facilitated, and adhesion between monofilaments is reduced. During secondary yarn spreading, fiber bundling force applied by surface tension of slurry does not need to be overcome, secondary spreading of fiber bundles is achieved under high-frequency vibration of the vibrating roller, and good monofilament dispersity is guaranteed.

The invention discloses special cloth for a single-sided terry bath foaming towel and a weaving method of the special cloth. The terry cloth comprises a three-layer structure integrally woven by a warp knitting machine, wherein the three-layer structure comprises a base layer and 100D / 36F polyester filament yarn warp knitting chain weave; the binding layer is a 100D / 96F polyester filament chain stitch and penetrates through the substrate layer; the looped pile layer is of a vertical looped pile structure formed by 300D / 10F polyester filaments, the height of looped piles is 7-8 mm, and the density of the looped piles is 25-30 / cm; the thickness ratio of the base layer to the binding layer to the looped pile layer of the three-layer structure is 0.6: 1: 7. The three kinds of yarns with different thicknesses are combined to form a three-layer structure, the three-layer structure is directly formed through warp knitting, a traditional fuzzing roller is not needed for fuzzing, the upright performance of a looped pile is guaranteed, it is guaranteed that the looped pile does not generate monofilament breakage and is stable in structure, and the foaming performance and the weaving feasibility are balanced.

The invention relates to the technical field of fiber reinforcement, and discloses a melt impregnation weaving process of a flame-retardant fiber reinforced thermoplastic filling rope, the melt impregnation weaving process comprises fiber pretreatment, melt impregnation, multi-stage stretching setting, weaving forming and post-treatment, through the synergistic effect of plasma activation and nano flame-retardant pretreatment, the fiber surface activity and the flame retardant binding force are improved, and the flame-retardant fiber reinforced thermoplastic filling rope is obtained. Meanwhile, a segmented temperature control melt impregnation process is combined, so that the resin is ensured to form a uniform and complete coating layer on the surface of the fiber monofilament, the problems of weakening of interface bonding and non-uniform flame-retardant distribution in a traditional process are solved, and the flame-retardant efficiency and mechanical reliability of the filling rope are improved; a dynamic mathematical model of the tension gradient and the traction speed is established, the fiber crystallization orientation process is controlled, and the internal stress concentration phenomenon is eliminated; in combination with a dynamic tension compensation mechanism during weaving forming, the weaving tightness of the coating layer is corrected in real time, and the dimensional stability and the anti-fatigue performance of the filling rope under the complex load are guaranteed.

The invention discloses a carbon fiber prepreg, a preparation method thereof and a carbon fiber composite material, and relates to the technical field of advanced material compounding. The carbon fiber prepreg comprises a carbon fiber layer, a first resin matrix and a second resin matrix, the carbon fiber layer is coated with the first resin matrix, and gaps in the carbon fiber layer are filled with the first resin matrix; the first resin matrix is coated with the second resin matrix, and the second resin matrix comprises toughening particles; carbon fiber monofilaments of the carbon fiber layer have preset diameters which are larger than or equal to a preset threshold value. The carbon fiber composite material prepared from the carbon fiber prepreg has excellent compression performance, and the impact resistance, durability and other performance of the composite material can be effectively improved.

The invention provides an intelligent evaluation method for mechanical properties of a carbon fiber composite material, and relates to the technical field of material performance analysis, and the method comprises the following steps: evaluating the performance dispersion of a current batch of samples according to a fiber agglomeration area proportion and a carbon fiber monofilament diameter, and comparing the performance dispersion with a preset dispersion threshold, identifying a non-manufacturability discrete risk level; determining the tensile strength value of each sample through a tensile test, performing statistics to obtain a strength mean value and a strength standard deviation, performing matching analysis on the performance dispersion, the strength mean value and the strength standard deviation, and extracting the fiber reinforcement efficiency; performing weighted fusion processing on the fiber reinforcement efficiency and the fiber agglomeration area proportion to obtain a current batch fiber form comprehensive index, comparing the current batch fiber form comprehensive index with a historical batch, and identifying a fiber form change amplitude; and evaluating the quality consistency degree among the batches according to the strength deviation value and the dispersion difference among the batches, and identifying the non-manufacturability discrete source.

This invention provides a multifunctional gradient composite filament for 3D printing, its preparation method, and its applications, relating to the field of additive manufacturing materials technology. The filament's cross-section includes at least two structurally or functionally distinguishable regions, each region composed of a thermoplastic polymer with different chemical properties, or a thermoplastic polymer matrix with the same chemical properties but different functional modifications. These at least two regions are arranged in an ordered spatial pattern on the filament's cross-section using a multi-component co-extrusion technique, enabling pre-design and integration of properties. This invention overcomes the inherent limitations of traditional single-material filaments, achieving multifunctionality and performance designability of a single filament. It significantly improves the interlayer bonding performance of multi-component 3D printing and the comprehensive mechanical properties of the printed composite material. Furthermore, it allows for the production of components with both functional gradients and high mechanical properties in a single printhead operation, making it suitable for mass production.

A detachable carpet mat, where raised monofilaments and fleeces are bent through a high temperature to form a hooking-connecting effect with a first water-repellent anti-slip layer placed below the monofilaments and the fleeces, resulting in better bonding capacity, greater friction force and better firmness. Melted and solidified through the high temperature, the monofilaments and fibers of a hooking layer are not prone to falling off; the monofilaments of the hooking layer have a certain curvature and surfaces of small bumps of piles are passivated so as to prevent users from accidentally hurting their hands, and at the same time, enhance the locking effect with the first water-repellent anti-slip layer below.

A manufacturing method of an SMC of the present invention comprises (i) forming chopped carbon fiber bundles by chopping a continuous carbon fiber bundle having a filament number of NK with a rotary cutter, (ii) fragmentation-processing the chopped carbon fiber bundles by using a fragmentation-processing apparatus comprising a rotating body, (iii) forming a carbon fiber mat by depositing the fragmentation-processed chopped carbon fiber bundles on a carrier film traveling below the rotary cutter, and (iv) impregnating the carbon fiber mat with a thermosetting resin composition, wherein N is 20 or more, and the fragmentation-processing apparatus comprises a first pin roller and a second pin roller which are disposed side by side, each having a rotation axis parallel to a rotation axis direction of the rotary cutter.

The utility model relates to a center twisting type ultra-weak fiber bragg grating temperature and humidity stranded yarn, which adopts a humidity ultra-weak fiber bragg grating array, the temperature ultra-weak fiber bragg grating array and Kevlar fibers are combined to wrap a spiral armor tube, and then a metal wire braid layer is braided along the axial direction to form a temperature and humidity intelligent monofilament; the temperature and humidity intelligent monofilament serves as a center filament and is twisted with the six stainless steel wires to form a cable shape, and the temperature and humidity stranded filament of the ultra-weak fiber grating is manufactured. According to the utility model, the long-distance temperature and humidity ultra-weak fiber grating array is adopted to monitor temperature and humidity, temperature compensation is facilitated, temperature and humidity changes can be quickly responded, the filamentation porosity is large, the response speed is high, the mechanical strength is high, the adaptability is strong, and subsequent processing is facilitated.

The invention relates to a bi-component fiber and a preparation method thereof, polyester melt and polyamide melt are extruded from a spinneret plate side by side, cross air blowing cooling is performed to obtain nascent fiber, and then the nascent fiber is sequentially subjected to heat pipe heating, oiling, pre-interlacing, three-roller drafting heat setting and winding to obtain the bi-component fiber. The heat pipe is used for heating nascent fibers, and the temperature of the heat pipe is 90-100 DEG C; the three rollers comprise a first hot roller, a second hot roller and a third hot roller; the temperature of the first hot roller is 70-90 DEG C, the temperature of the second hot roller is 110-130 DEG C, and the temperature of the third hot roller is 140-160 DEG C; the filament number of the prepared bi-component fiber is 2.6-3.5 dtex, the breaking strength is larger than or equal to 3.23 cN / dtex, the elongation at break is 27.45-38.31%, the number of broken ends is smaller than or equal to 2.3 times / (48 bits. 24 hours), and the broken filament rate is stably controlled to be 0.30% or below. According to the preparation method, generation of internal stress is greatly reduced; the mechanical property of the bi-component fiber is improved, and the number of broken ends and the broken filament rate of the fiber are obviously reduced.

The invention relates to a continuous carbon fiber silica gel thermal interface material and a preparation method thereof, and the preparation method of the continuous carbon fiber silica gel thermal interface material is characterized in that the continuous carbon fiber silica gel thermal interface material is finally prepared by taking a carbon fiber bundle in a plurality of rolls of carbon fiber yarn shafts as a starting point through eight steps, and carbon fiber monofilaments in the continuous carbon fiber silica gel thermal interface material are distributed in the same direction. In the continuous carbon fiber silica gel thermal interface material, all carbon fibers are parallel in the thickness direction of the continuous carbon fiber silica gel thermal interface material; and the length of each carbon fiber is the same as the thickness of the continuous carbon fiber silica gel thermal interface material, so that the transfer path of heat along the carbon fibers in the heat dissipation process is shortest, and the axial heat-conducting property of the carbon fibers is maximized. The carbon fibers in the continuous carbon fiber silica gel thermal interface material are all in the same direction and are continuous, so that the heat dissipation performance of the continuous carbon fiber silica gel thermal interface material can be greatly improved.

The present disclosure provides a novel type of fiber monofilament for use in place of non-sustainable cotton. The fiber monofilaments comprise at least 50% by weight of non-regenerated microfibrillated cellulose (MFC), an amino-functional polymer component, and an epoxy-functional crosslinker. In addition, the present disclosure provides a product comprising the fiber monofilament and a method of making the fiber monofilament.

The utility model discloses an air layer breathable fabric with upper and lower mesh jacquard and a vamp, and relates to the technical field of fabrics. The upper and lower mesh jacquard air layer breathable fabric comprises a surface layer, a middle layer and a bottom layer, the surface layer and the bottom layer are woven and connected through monofilaments or multifilaments to form an air layer, the middle layer comprises a plurality of cavities, and the surface layer and the bottom layer are both provided with a plurality of semi-through holes. The tuck semi-through holes and the full-through holes are formed in the surface layer and / or the bottom end, and the air layer is arranged between the surface layer and the bottom layer to improve the ventilation effect; the doubling stitch semi-through holes are formed in the surface layer and the bottom layer in an inclined needle mode, and the heat retention property of the air layer breathable fabric in the whole application process is improved; according to the air layer breathable fabric, the overall structure is matched, so that the fabric has breathability and heat retention property, the layer bodies are connected in a staggered mode, and the integrity of the fabric is better.

The invention discloses a special spinning oil agent for PEEK fine denier monofilament, which comprises the following components in percentage by mass: 35-65% of smoothing agent, which is prepared by mixing heat-resistant synthetic ester and polyether modified siloxane according to the mass ratio of (2-5): 1; the composite antistatic agent is formed by mixing alkyl sulfonate and potassium alkyl phosphate according to the mass ratio of 1: (1-2); the compound emulsifier is formed by mixing fatty alcohol-polyoxyethylene ether and castor oil polyoxyethylene ether according to the mass ratio of (1-3): 1; 4-12% of a high temperature resistant additive, which is tricresyl phosphate; 1-6% of a bundling agent which is a polyoxyethylene ether compound; 0.5-4% of a fiber splitting agent, which is a siloxane derivative; the functional additive is prepared by mixing a hindered phenol antioxidant and nano silicon dioxide according to the mass ratio of (1-3): 1; and 5-15% of deionized water. The high-temperature-resistant antistatic emulsion has the advantages of excellent high-temperature resistance, antistatic effect and emulsion stability.

A polyester-based woven hook-and-loop fastener including: a woven-fabric and engaging elements, in which the woven-fabric in which a polyethylene terephthalate-based multifilament yarn is a warp yarn and a polyester-based heat-fusible multifilament yarn is a weft yarn is a woven base fabric, a yarn for the engaging elements made of at least one kind selected from the group consisting of a polyethylene terephthalate-based monofilament yarn and a polyester-based multifilament yarn, is woven in parallel to the warp yarn into the woven base fabric, the engaging elements that are formed of the yarn for the engaging elements, that are made of at least one kind selected from the group consisting of a large number of hook shapes and loop shapes, and that rise up from a front face of the woven base fabric, exist on the front face of the woven base fabric, bases of the engaging elements are fixed to the woven base fabric by a melt-solidified material of a heat-fusible component of the the polyester-based heat-fusible multifilament yarn, and the polyethylene terephthalate-based multifilament yarn is made of a copolymerized polyethylene terephthalate containing, as copolymerization components, 1.0 to 2.0 mol % of isophthalic acid with respect to a total amount of dicarboxylic acids and 2.0 to 3.5 mol % of diethylene glycol with respect to a total amount of diols.

Described is an insect net strip produced from a wide insect net which has been cut in a warp direction (xnet) by means of a one-step ultrasonic cutting and welding process. The insect net strip includes warp yarns and weft yarns extending substantially perpendicular to each other and at least 90% of the warp and weft yarns are monofilament yarns made of a thermoplastic material. After cutting and welding process the insect net strip has a first and a second edge extending parallel to said warp yarns each including a deformation zone being constituted by consolidated thermoplastic material deriving at least from said weft yarns. The deformation zone has a width (wdz) in the transverse direction (ystrip) of between 0.5-35 times the weft yarn diameter (øwe). At least 90% of gaps between adjacent weft yarns in the deformation zone are closed by consolidated thermoplastic material at least from the weft yarns which has been melted together to form a continuous or substantially continuous reinforced band-shaped edge portion of said insect net strip. The insect net strip is suitable for use in accordion-style constructions in greenhouse ventilation openings. A method for producing the insect strips is also described.

The invention relates to a high-strength and high-modulus polyacrylonitrile carbon fiber precursor, a carbon fiber and a preparation method thereof, and belongs to the field of polyacrylonitrile-based carbon fiber preparation. A wet spinning process is adopted, the method comprises the solidification step of at least two solidification baths, and n spraying devices are arranged between every two adjacent solidification baths in the solidification process to spray solutions to bath separation fibers; the concentrations Cg (i-1) and Cgi of the polar organic solvent in two adjacent coagulating bath solutions and the concentration C1-Cn of the polar organic solvent in the solution of the spraying device between the two adjacent coagulating bath solutions meet the following relational expression: Cg (i-1) is greater than or equal to C1gt; c2gt; C2gt; gt,... gt; cn > = Cgi, i > = 2, and n > = 3. The method mainly solves the problems that in the prior art, the breaking elongation coefficient of protofilaments (monofilaments) is large, and the number of broken filaments is large in the solidification process. According to the technical scheme, the problems are well solved, and the method can be used for preparing high-performance carbon fibers.

The invention relates to the technical field of cables, in particular to a torsion-resistant shielding cable and a manufacturing method thereof.The torsion-resistant shielding cable comprises a cable core, a filling layer, a wrapping shielding layer, an isolating layer, a braided shielding layer and an outer sheath, the braided shielding layer is coated with a bonding layer capable of filling the gap between the first braided unit and the second braided unit, under the action of the bonding layer, the broken monofilament is still attached to the adjacent monofilament, the broken position of the monofilament cannot tilt, and a cable sheath is prevented from being punctured by friction. The braided shielding layer is formed by braiding copper wires and graphene composite fibers, and the graphene composite fibers can enable the braided shielding layer to form a heat conduction channel which diffuses heat in the axial direction of the cable, so that the heat at the torsion part of the cable is diffused to the two ends of the cable, a cooling effect is achieved, and the fracture probability of the copper wires is reduced. And the torsion resistance of the cable can be improved.

This invention discloses an ultrafine polyethylene / polyester composite fiber and its preparation method, belonging to the field of composite fiber technology. It solves the problems of poor compatibility between the core and sheath layers, excessive fineness of PE / PET fibers, and difficulties in achieving ultrafine fiber production in existing technologies. The method involves preparing ultrafine polyethylene / polyester composite fibers using a core-sheath composite spinning process. The single filament fineness of the ultrafine polyethylene / polyester composite fiber is 0.6~0.8 dtex. The ultrafine polyethylene / polyester composite fiber has a core-sheath structure, with the sheath material being polyethylene and the core material being a blend of modified polyester and a compatibilizer. The modified polyester molecular chain consists of terephthalic acid segments, ethylene glycol segments, and isophthalic acid segments. The compatibilizer is a graft copolymer of polyethylene and poly(ethylene-co-glycidyl methacrylate)-g-polymethyl methacrylate. The preparation method of this invention is simple and easy to implement, with excellent core-sheath compatibility, which is beneficial for achieving ultrafine fiber production. The composite fiber exhibits excellent performance and can meet the demands of the high-end market.

The invention discloses an image resolution monofilament detection system and method, and relates to the technical field of monofilament detection. According to the image resolution monofilament detection system and method, a high-resolution camera is used for collecting a marked area image caused by an identification accessory on a chemical fiber godet wheel in real time, an image processing module is used for carrying out noise removal and color space conversion on the image, and a Canny edge detection algorithm is used for extracting the edge contour of the image. And the color identification module analyzes the color change of the marked area through a contour tracking algorithm, calculates to obtain a broken wire index, and judges whether the marked area is a broken wire area according to a preset threshold value. The broken wire judgment module judges whether the wire guide wheel rotates or not according to the color recognition result so as to judge whether the wire is broken or not, and early warning information is sent out when the wire is broken. The system can accurately monitor the yarn breakage problem in the chemical fiber production process, and has efficient and real-time yarn breakage detection capability.

The invention relates to the technical field of high polymer materials, in particular to ultra-high molecular weight polyethylene tarpaulin and a preparation method thereof.The preparation method comprises the following steps that S1, ultra-high molecular weight polyethylene resin is subjected to melt spinning, high-power hot stretching and twisting treatment; s2, weaving the fiber monofilaments into base cloth through a weaving process; s3, mixing the components according to a preset proportion to form a mixture A; s4, melting and plasticizing the mixture A, and curtain-coating the double surfaces of the base cloth with composite film layers through a curtain-coating die head; s5, a reinforced waterproof layer material is attached to the outer side of the composite film layer; and S6, finally, edge cutting and rolling treatment are conducted. The ultra-high molecular weight polyethylene fiber base material, the optimized composite film layer and the reinforced waterproof layer are adopted, and a multi-step precise process is combined, so that the tensile strength, the tear resistance, the weather resistance and the waterproof performance of the tarpaulin are remarkably improved, and the tarpaulin can adapt to various complex environments and high-strength use scenes.

The invention discloses a device and process of controlling / stabilizing tension in a filament / monofilament, flat / fibrillated tape or yarn while winding it on a core in a winding machine. More particularly, it discloses a multistage tension control device to precisely control the tension in winding of low denier yams as low as up to 15 denier or so. The initial stage of the device has a stabilization roller unit (1) and the last stage comprises a moving arm mechanism (7). The stabilization roller unit (1) comprises a yarn aligner support (4), a positively driven accumulator roller (3), a stabilization roller (2). The moving arm mechanism comprises a moving guide wheel (8), a moving arm (9), a pivot pin (14), a moving arm stopper (12), an exit guide wheel (10), a low friction cylinder (16), and a balance weight (15). The device and the process of invention improves the bobbin quality.

The present invention discloses a preparation method of a low-resin mica tape by hot pressing. This method uses epoxy resin and hyperbranched polyester resin to prepare a sizing material, dilutes part of the sizing material to obtain a diluted sizing material, uses a silicon chloride-acetone solution to treat a reinforcing fiber fabric and reinforcing fiber filaments respectively to obtain a modified reinforcing fiber fabric and modified reinforcing fiber filaments, then adds silicon chloride to the diluted sizing material to impregnate the modified reinforcing fiber fabric to obtain a reinforcing material layer, and at the same time takes a base sizing material and adds modified reinforcing fiber filaments to obtain an adhesive; the adhesive is coated on one or both sides of a mica paper substrate to obtain an adhesive layer, the reinforcing material layer is laid flat on the surface of the adhesive layer, and after two roller pressings, it is dried, slit, and wound up to obtain a finished low-resin mica tape. The mica tape prepared by the method of the present invention has a low resin content and has better VPI process performance.

A fabric with a three-layer mesh bottom layer through hole structure comprises a surface layer which is a single-layer solid layer formed by interweaving transparent yarns with different elasticity, a middle layer which is formed by interweaving one or more than one shuttle of monofilaments up and down and is used for connecting the surface layer above the middle layer, and a bottom layer located below the middle layer, the bottom layer is a single-layer solid layer formed by interweaving different polyester yarns and monofilaments, the porous structure is located on the upper middle portion of the bottom layer, the porous structure is a warp weave structure formed by interweaving dyed yarns and transparent yarns in a staggered mode, the material is expanded to form any hole shapes, the air permeability is improved while the layers are rich, and the service life of the material is prolonged. The porous structure that the surface layer can see through the bottom layer is achieved through the layered structure, and the air permeability of the vamp can be further improved through the porous structure of the bottom layer.

The utility model relates to a production system for core-spun wrapping ring spinning, which comprises a silk winder for combining two single filaments into double filaments and then winding the double filaments on a roving bobbin, and a spinning frame connected with the roving bobbin, and a tension device for the double filaments to bypass is arranged between the roving bobbin and a double-groove godet wheel of the spinning frame. And the two single filaments are respectively wound by the filament separating rod. A traditional spindle blade type silk winder is improved, the purpose that two filaments are combined into roving bobbin packages is achieved, and therefore a filament bobbin winding mode which is large in capacity, compact in thread pitch and long in spinning period is provided for the spinning stage. Secondly, spinning equipment is modified, a tension device and a yarn separating rod are arranged, a double filament is separated into two single filaments, and the two single filaments and short fibers are fed together for twisting, so that the yarn changing frequency is reduced, the high-altitude operation frequency is reduced, and the production efficiency is guaranteed.

The utility model discloses a high-performance fiber monofilament friction factor testing system based on sound signals, which comprises a signal processor, a controller, a motor, a sample carrying table, a friction roller and a sound acquisition device, the signal processor is connected with the controller, the controller is respectively connected with the motor and the sound acquisition device, and the motor is connected with the friction roller. The motor is connected with the sample carrying table; a fiber monofilament to be tested is hung on the friction roller, one end of the fiber monofilament to be tested is connected with a first weight, and the other end of the fiber monofilament to be tested is connected with the sample carrying table. According to the device, the friction factors of the high-performance fiber monofilaments under two contact working conditions of friction between the filaments and a carrier and friction between the filaments can be measured, and the friction behaviors of the fiber filaments of different types and different finenesses can be analyzed under various conditions of different loads, different moving speeds and the like.