12023 results about "Yarn" patented technology

The invention relates to the technical field of textile informatization and block chain encryption traceability, in particular to a textile quality block chain encryption traceability method, which comprises the following steps of: implanting quantum dot-nucleic acid mixed fingerprints into yarns in a spinning stage and generating distributed identities; in the production link, process data are collected in a trusted execution environment, and are packaged into an encrypted packet by using homomorphic encryption, zero-knowledge proof and threshold signature; and after a batch threshold value is reached, calculating a batch commitment and a fragmentation commitment, fragmenting through erasure coding, writing the commitment and the proof into the directed acyclic graph according to a fixed field, and confirming through a Byzantine fault-tolerant consensus. Consumer off-line fingerprint comparison and homomorphic verification can realize authenticity identification, and after networking, batch certification is verified and credits are pledged. And when the time lock expires, the historical quality data is decrypted by multiple subjects in a combined manner, and maintenance suggestion hash is generated and written into subsequent transactions, closed-loop tracing from production to maintenance is realized, and anti-counterfeiting, privacy protection and quality improvement are realized at the same time.

The invention belongs to the technical field of flexible sensing, and discloses a flexible piezoresistive sensing array based on a triangular truss grid structure weft knitting spacer fabric, which is of a five-layer composite structure integrally woven and formed through a weft knitting process. The first packaging layer, the first electrode layer, the spacer fabric spacer layer, the second electrode layer and the second packaging layer are sequentially arranged from top to bottom; the first packaging layer and the second packaging layer are formed by weaving insulating yarns and are respectively an upper surface layer and a lower surface layer of the spacer fabric; the spacer fabric spacer layer is of a three-dimensional elastic supporting structure and comprises a plurality of first spacer layer transverse rows and a plurality of second spacer layer transverse rows which are formed by alternately weaving the upper face layer and the lower face layer of the spacer fabric through tucking. The first spacing layer transverse rows and the second spacing layer transverse rows are arranged in the spacing fabric in a staggered mode and are sequentially connected end to end to form a transverse row crossing cross-linked type triangular truss grid structure. The flexible piezoresistive sensing array provided by the invention has high structural integrity and long-term stability.

The invention provides a textile industry broken yarn identification method and system based on a neural network, and the method comprises the steps: collecting yarn multi-modal data, including a surface image, a fracture sound wave signal and tension change data; preprocessing the data, and extracting an image ROI region, sound wave spectrum features and a tension mutation sequence; performing space-time alignment and feature extraction on the extracted content to obtain a joint feature vector; inputting the broken yarn into a trained broken yarn identification model, wherein the model can identify broken yarn features; judging whether broken yarns exist or not according to the output result and outputting an identification result; and updating the model through online incremental learning. According to the method, multiple types of data are combined, the adaptive preprocessing and feature extraction technology is used, environmental noise is inhibited, key features are focused, and the problem of false alarm of a traditional sensor is solved; multi-modal features are fused through space-time alignment and a self-attention mechanism, and bidirectional LSTM modeling is combined, so that a broken yarn dynamic rule is accurately captured, and the problems of missing detection and delay of manual inspection are avoided.

A woven silt fence fabric includes two or more distinctly different colors of warp yarns in the machine direction. The woven silt fence fabric includes a first woven fabric portion to be installed in the ground having a first color that is distinctly different from a second color of a second woven fabric portion to be installed and remain exposed above the ground.

A pickleball paddle comprising: a handle; a ball striking blade formed integrally with the handle; the handle and the blade being formed from a core layer sandwiched between outer layers to form a unitary body; core layer comprising a thickness which is substantially greater than thickness of the outer layers, wherein each of said outer layer comprises one or more layers of composite material yarns that are pre- impregnated with epoxy with at least an outermost layer of said composite material yarn comprising embedded grit particles that are embedded into said outermost layer of the composite material yarns.

The invention relates to the field of yarn spinning, in particular to a real-time quality rating method and system for yarn spinning. The method comprises the following steps: acquiring a space-time charge data set, and generating a yarn electrostatic state data set through a multi-mode sensing fusion strategy; on the basis of the yarn static state data set, yarn spinning quality defects are recognized by combining yarn form data collected in real time, two-dimensional dynamic rating is executed according to defect types and severity, and yarn real-time quality rating is generated; according to the yarn real-time quality rating, carrying out change trend analysis on the yarn real-time quality rating to generate a yarn subsequent quality change trend; and executing a corresponding process regulation and control instruction according to the subsequent quality change trend of the yarn, and outputting a quality rating log. In the yarn spinning process, process look-ahead optimization is achieved, quality tracing is perfected, and the accuracy and real-time performance of quality rating are improved.

The invention discloses a yarn weak twist and hairiness intelligent detection system based on visual stroboscopic synchronization, particularly relates to the field of quality control in the textile industry, is used for solving the problem of accurate detection of weak twist and hairiness defects in the yarn production process, and dynamically adjusts the flash frequency of a stroboscope according to the real-time speed and acceleration data of yarn, so that the detection accuracy is improved. The light source and the yarn are ensured to move synchronously, and a high-resolution image is obtained. In combination with yarn motion spectrum analysis and image quality evaluation, a complexity score and a matching degree score are generated and are used for dynamically regulating and controlling image noise reduction and edge detection parameters, and characteristic extraction requirements under different yarn motion conditions are met. The weak twist characteristic and the hairiness texture of the yarn are accurately extracted through a multi-scale edge detection and wavelet transform algorithm, a twist distribution model is constructed, the boundary range is corrected in combination with hairiness distribution data, characteristic interference is reduced, and the detection precision and reliability are improved.

The invention belongs to the technical field of textile dyeing methods, and particularly relates to a tension-free anti-fibrillation dyeing method for lyocell blended yarn. The tension-free fibrillating-resistant dyeing method of the lyocell blended yarn comprises the following steps: preparing a bobbin-free loose yarn bundle, namely loosely winding lyocell pure spinning or blended yarn into tension-free yarn bundles of which the weight is 0.5-1.5 kg by adopting an integrated chuck bobbin, and meanwhile, wrapping the tension-free yarn bundles with knitted sock legs; according to the tension-free loose yarn bundle filling, a cross-shaped lifting chain is matched with a yarn bundle grate, staggered filling shaped like a Chinese character'pin 'is achieved, and the loading rate ranges from 90% to 120%. The tension-free one-bath dyeing / cross-linking comprises the following steps: pre-treating the filled tension-free loose yarn bundle, performing dyeing and cross-linking through a one-bath two-step method, and finally performing soaping, hot water washing, color fixation / softening one-bath treatment and radio frequency drying. According to the tension-free antifibrillating dyeing method for the lyocell blended yarn, dyeing is uniform, the color difference is small, and the percent of pass is increased.

The invention relates to the related technical field of zipper anti-blocking, in particular to a light and thin fabric jacket zipper anti-blocking process optimization method, which comprises the following steps: integrating material structure parameters and mechanical behavior characteristics, performing dynamic stress simulation on a light and thin fabric jacket zipper mounting area, analyzing stress distribution and evolution rules under different motion states and opening and closing speeds, and determining the anti-blocking process of a light and thin fabric jacket zipper. And a zipper anti-clamping groove structure is arranged, and a process optimization parameter combination is obtained through parameter optimization. The technical problems that comprehensive analysis of material structure parameters such as yarn density and friction coefficient and mechanical behavior characteristics is lacked, stress distribution of a zipper installation area cannot be accurately determined, and jamming and fabric wrinkling and damage are prone to occurring are solved, stress distribution of the zipper installation area in different motion states is determined, and the application range of the zipper installation area is widened. The elastic buffer layer and the guide sliding rail are arranged through stress distribution, the elastic buffer layer is differentially configured according to a high-stress area, the guide sliding rail is sectionally arranged according to pressure distribution of a contact surface, stress is effectively absorbed and dispersed, and the zipper is guided to slide smoothly.

The present application belongs to the technical field of flexible sensing, and discloses a flexible piezoresistive sensing array based on a triangular truss grid structure weft-knitted spacer fabric, which is a five-layer composite structure integrally formed through a weft-knitting process, and sequentially comprises a first encapsulation layer, a first electrode layer, a spacer fabric spacing layer, a second electrode layer and a second encapsulation layer from top to bottom; the first encapsulation layer and the second encapsulation layer are knitted from insulating yarns and serve as upper and lower layers of the spacer fabric respectively; the spacer fabric spacing layer is a three-dimensional elastic support structure, and comprises a plurality of first spacer layer courses and a plurality of second spacer layer courses alternately knitted through tuck stitches on the upper and lower layers of the spacer fabric; the first spacer layer courses and the second spacer layer courses are staggered with each other in the spacer fabric and are sequentially connected at the head and tail to form a triangular truss grid structure in a cross-course crosslinking mode. The flexible piezoresistive sensing array of the present application has high structural integrity and long-term stability.

The invention belongs to the technical field of personal protection equipment, and particularly relates to a lightweight cut-resistant four-dimensional structure fabric based on high-performance composite fibers and a preparation method of the lightweight cut-resistant four-dimensional structure fabric. The structure is based on a high-performance composite fiber material and a nano silicon carbide embedding technology of high-performance polyethylene fibers, the hardness bottleneck of a single material is broken through, and multi-fiber compatibility is improved through cooperation of polyurethane fiber surface activation and polyurethane fiber anti-melting modification. The gradient twist core sheath yarn is a high-performance composite yarn, and the strength and the flexibility are balanced. In the aspect of the oversleeve fabric structure, a three-dimensional protection system comprising a honeycomb structure, a silica gel liner and a skin-friendly inner layer is adopted, so that the integration of multiple functions of hydrophobicity, fusion resistance and buffering of a light-weight cut-resistant material is realized. Under the EN 388 standard, 5-level cutting prevention can be achieved, a single high-performance polyethylene fiber cutting prevention oversleeve can only reach 3-4 levels, the weight of the composite fiber material is reduced by 40% compared with that of a full aramid fiber oversleeve, the thickness is reduced by 25%, and the composite fiber material can be suitable for complex scenes such as petroleum and electric power.

The invention relates to the technical field of textile machinery, and discloses a covering yarn machine spindle speed and twist control system which comprises a data acquisition module, a global control module, an individual diagnosis module, a power execution module and a man-machine interaction module. The actual average speed of the whole machine is calculated by collecting the speed of each spindle in real time, and PID closed-loop control is carried out on the actual average speed and a set value, so that the systematic speed deviation of the whole machine is accurately corrected. Meanwhile, the individual diagnosis module calculates spindle difference signals of the speeds of the spindles and the average speed of the whole machine in parallel, time domain and frequency domain analysis is carried out on the signals, and hidden faults such as steady-state deviation, periodic fluctuation and transient impact existing in a single spindle are accurately recognized. And finally, the system carries out visual early warning through a human-computer interaction interface and provides a predictive maintenance instruction. According to the method, high-precision control of the twist and high consistency of products are achieved, an effective predictive maintenance mechanism is established, and the production quality and the intelligent level are remarkably improved.

The invention discloses a vacuum-assisted pultrusion preforming device for a composite material. The vacuum-assisted pultrusion preforming device comprises a yarn threading plate, a gum dipping tank, a gum extruding roller and a vacuum-assisted preforming mold which are sequentially arranged in the pultrusion direction, wherein fiber bundles penetrate through the yarn threading plate in a layered mode, the gum dipping tank is used for containing resin, and the gum extruding roller is used for extruding redundant resin. The vacuum auxiliary preforming mold is provided with a preforming mold cavity, a vacuum cavity is formed in one section of the preforming mold cavity of the vacuum auxiliary preforming mold, an air exhaust hole is formed in the upper portion of the vacuum cavity, and a semi-permeable membrane allowing gas to pass through but blocking resin to pass through is arranged at the air exhaust hole. And the air exhaust hole is externally connected with a vacuumizing device. The vacuum-assisted pultrusion preforming device can effectively discharge microbubbles in resin and fiber bundles, effectively control uniform distribution of the content of the resin and remarkably promote full infiltration of high-viscosity resin to fibers.

The invention belongs to the technical field of textile materials, and particularly relates to an antibacterial regenerated wool blended yarn and a production process thereof.The antibacterial regenerated wool blended yarn is prepared from, by weight, 35 parts of regenerated wool fibers, 25-33 parts of LF tencel, 15-27 parts of cellulosic fibers, 8-12 parts of antibacterial chinlon 6 and 5 parts of an antibacterial complexing agent; according to the regenerated wool fiber prepared from the waste wool product through a synergistic improvement process of biological enzyme targeted cleaning and plasma etching, the natural properties of the wool fiber are reserved, and meanwhile, a surface pore structure capable of being combined with an antibacterial complexing agent is also formed; through a Z / S double-twist asynchronous spinning process, dynamic balance of a multilayer structure and hygroscopicity and strength of the blended yarn is achieved, and environment friendliness and commercial feasibility are both achieved.

The invention relates to the technical field of chinlon industrial yarns, and discloses a preparation method of a high-strength and high-toughness chinlon industrial yarn, which comprises the following steps: (1) preparing raw materials; (2) mixing the materials; (3) melt spinning; (4) stretching and heat treatment; (5) fiber surface modification; according to the invention, by fusing the advantages of high crystallization speed of nylon 6 and high melting point and high strength of nylon 66, a matrix material with good processing fluidity is formed, and the strength and fatigue cycle resistance of the chinlon industrial fiber are obviously improved. By introducing the maleic anhydride grafting agent, polar groups can be introduced among molecular chains through grafting reaction, so that the hydrogen bond density and crystallinity are remarkably improved, the molecular chains are arranged more regularly, and the tensile strength and heat resistance of the material are improved. The sea-island structure of the polyether ester elastomer effectively absorbs impact energy, so that the elongation at break is greater than or equal to 28%; the nano silicon dioxide inhibits crack propagation, and the service life of the material is remarkably prolonged.

The invention relates to the technical field of computer-aided engineering, in particular to a pure cotton dark-color fabric dye-resistant area dynamic prediction method based on a dye diffusion model. The method comprises the following steps: acquiring a parameter data set representing a fabric microstructure, dye properties and a printing process; on the basis, a multi-scale coupling mathematical model is constructed, the dye diffusion range is predicted, the diffusion process is decomposed into seepage diffusion between macroscopic yarns and diffusion in microcosmic fibers through the model, and the diffusion rate difference of the dye in the fabric direction is represented through anisotropic diffusion tensors; through finite element analysis of structure perception, running a model to calculate dye space-time concentration distribution, and generating geometric data for predicting a bleeding boundary according to a preset concentration threshold value; according to the data, printing process parameters and model parameters are adjusted in a self-adaptive mode, and dynamic prediction of the dye-resistant area is achieved; according to the method, computer simulation and finite element analysis technologies are utilized, and the accuracy of dynamic prediction of the dyeing-resistant area of the pure cotton dark-color fabric is improved.

The invention provides a spinning threading action optimization method and system based on path deep learning, and the method comprises the steps: firstly obtaining a continuous three-dimensional point cloud sequence of a yarn broken end region, yarn physical attributes and mechanical arm dynamic parameters, and then constructing a tension-moment constraint related to the tensile strength of yarn according to the physical attributes and the dynamic parameters, meanwhile, on the basis of the three-dimensional point cloud sequence, a motion acceleration constraint associated with the anti-jitter capacity and an obstacle avoidance safety distance constraint associated with the obstacle distribution density are constructed, and then a loss function of a pre-constructed mechanical arm path generation neural network is optimized according to the three kinds of dynamic constraints linked with a scene; according to the invention, the first success rate and the track stability of the threading action can be improved, the threading failure caused by snapping, throwing or collision is reduced, the threading time is shortened on the premise of ensuring the safety of yarns, and the reliability of spinning operation is improved.

The invention relates to a device and a method for preparing nanofiber core-spun yarn through batch coaxial electrostatic spinning. The device comprises a needleless dish-shaped spray head, an air blowing auxiliary device, a liquid supply device, an annular twisting device, a high-pressure generator, a negative-pressure air suction device, a winding device and an unwinding device. The core yarn penetrates through the axis of the needleless dish-shaped nozzle, the nanofiber generated by the needleless dish-shaped nozzle coaxially wraps the surface of the core yarn through the whole spinning device, and batch preparation can be achieved. The device is further provided with an air blowing auxiliary device and a negative pressure air suction device, under the air blowing effect of an air blowing nozzle and the adsorption effect of a negative pressure air suction shell, airflow force can be generated to promote jet flow to be further stretched in a straightened mode, under the common influence of electric field force and the airflow force, the jet flow is fully stretched, bending is reduced, and the service life of the jet flow is prolonged. Therefore, the nanofiber bundles can continuously cover the surface of the core yarn in a high-orientation state under the traction of the annular twisting device, and the continuous nanofiber core-spun yarn is formed.

Aspects herein are directed to textile that includes a first layer formed from a first plurality of yarns or fibers. The first layer includes a first set of apertures, each aperture having a first opening size. The textile further includes a second layer formed from a second plurality of yarns or fibers. The second layer includes a second set of apertures. Each aperture in the second set of apertures is axially aligned with a corresponding aperture in the first set of apertures. Each aperture in the second set of apertures has a second opening size that is smaller than the first opening size of apertures in the first set of apertures. The first layer is relatively more hydrophilic than the second layer.

The invention relates to the technical field of fabrics, in particular to a moisture absorption and sweat releasing fabric and a preparation process thereof.The preparation process includes the following steps that raw materials including, by weight, 35-40 parts of modified polyester silk, 20-25 parts of functional yarn and 8-12 parts of polyester fiber are weighed; a preparation method of the modified polyester yarn comprises the following steps: melting, blending and extruding polyester resin and a modifier according to a weight ratio of 100: 5; weaving the modified polyester yarns, the functional yarns and the polyester fibers into a knitted fabric body by using a circular knitting machine; setting the knitted fabric body at a high temperature of 115 DEG C for 50 seconds, and obtaining the moisture-absorbing and sweat-releasing fabric after setting is finished. According to the moisture absorption and sweat releasing fabric, the modified polyester yarn, the functional yarn and the polyester fiber are woven into the knitted fabric through the circular knitting machine, the modified polyester yarn is improved and optimized by matching polyester resin with the modifier, and the moisture absorption and sweat releasing performance, the elasticity and the wear resistance of the polyester yarn are enhanced through mutual matching and mutual assistance of the raw materials.

The invention discloses a yarn winding device for polylactic acid plant dyed yarn, and belongs to the technical field of yarn winding, the yarn winding device comprises a yarn winding main machine, a winding roller is rotatably connected to the yarn winding main machine, a layered yarn winding module is arranged on the outer side of the winding roller, and the layered yarn winding module comprises an inner net cylinder, a convex block, a hollow layered hole shell and a hollow abutting rod; according to the device, polylactic acid plant dyed yarn is guided by the two guide blocks and then wound on the outer side of the inner net cylinder, the two hollow layered hole shells transversely move back to the outer side of the inner net cylinder to replace the inner net cylinder to wind the yarn when conveying of the yarn is stopped, a layered yarn roll is formed, four protruding blocks are matched with four hollow abutting rods and supporting blocks, and the layered yarn roll is formed. The yarn is supported from multiple areas of the inner layer and the outer layer of each layer of yarn, the hollow abutting rod and the protruding block can guide and convey external specified gas into the hollow layered hole shell and the inner net cylinder, so that the contact exchange effect of the yarn in the inner area of the yarn roll and air is improved, and the rolled yarn collecting effect is improved.

The invention relates to the technical field of yarn processing, and provides a high-twist yarn twisting processing device and method.The high-twist yarn twisting processing device comprises a yarn twisting mechanism, a processing mechanism and a winding mechanism, the processing mechanism comprises a base frame and a mounting part, two rubbing parts are oppositely arranged on the mounting part, and each rubbing part comprises a hollow steam section; first steam outlet holes and pricking needles are uniformly distributed on the steam section, and second steam outlet holes are formed in the pricking needles; high-twist yarn is rubbed through the two rubbing pieces, so that the pricking needles continuously pierce into the yarn, steam is conveyed into the steam section through the steam generator, one part of the steam is discharged to the outside through the first steam outlet holes and sprayed to the yarn, and the other part of the steam enters the pricking needles and then is discharged into the yarn through the second steam outlet holes to be discharged. Steam permeation is performed on the yarns inside and outside at the same time, and the yarns are rubbed to further promote steam permeation, so that the steam treatment efficiency and effect of the high-twist yarns are greatly improved.

The invention relates to the technical field of layered composite fabrics, and discloses a light-absorbing and heat-emitting chinlon fabric, a preparation method and application of the light-absorbing and heat-emitting chinlon fabric to thermal fabrics. According to the invention, the fluorine-free and waterproof light-absorbing and heating finishing agent with excellent light-absorbing and heating performance is prepared, then the sulfydryl silane modified chinlon single-layer fabric is subjected to surface finishing by adopting the light-absorbing and heating finishing agent through sulfydryl-alkene click reaction, and the prepared light-absorbing and heating chinlon single-layer fabric is used as the surface layer fabric; the light-absorbing and heating chinlon fabric obtained by compounding the light-absorbing and heating chinlon fabric with the inner layer made of the acrylic fiber / special-shaped section chinlon blended yarn not only has excellent light-absorbing and heating performance, but also has good waterproof performance of the surface layer, good warm-keeping performance of the inner layer and good wearing comfort, and can be applied to warm-keeping fabrics.

Provided are: a knitted fabric having excellent skin smoothness, heat retaining properties, and washability and wearing properties; and an excellent apparel comprising the knitted fabric. The present invention relates to a knitted fabric, and more specifically, to a knitted fabric having a single-side knitted structure in which courses of fibers (1) comprising short fiber yarns and courses of fibers (2) comprising long fibers are alternately and repeatedly present in the warp direction, the knitted fabric being characterized in that the ratio (D2 / D1) of the total fineness D2 of the fibers (2) to the total fineness D1 of the fibers (1) is in the range of 0.50-0.90, and the ratio (D2 / D1) of the total fineness D2 of the fibers (2) to the total fineness D1 of the fibers (1) is in the range of 0.50-0.90. The ratio (L2 / L1) of the filament length L2 of the fibers 2 to the filament length L1 of the fibers 1 per 100 wales is greater than 1.00.

The invention provides a superfine denier profiled polyester staple fiber and a preparation method thereof.The preparation method includes the steps of raw material pretreatment, melt spinning, nascent filament treatment, heat setting and curling, oiling and cutting off and the like, polyester chips have high intrinsic viscosity and melting point, and under the action of six-zone temperature control, a high-hole-density spinneret plate and a high draft multiple, the polyester chips are subjected to melt spinning, so that the polyester chips are prepared into the superfine denier profiled polyester staple fiber. The superfine, special-shaped and hollow polyester staple fibers are prepared. The obtained polyester staple fiber has good breaking strength, rebound resilience and a low-defect structure, the bulkiness, flexibility and structural consistency of the fiber are remarkably improved, the environment and process limitation of a traditional sea-island fiber alkali stripping method is broken through, and the polyester staple fiber is suitable for the fields of high-end filling, plush imitation, non-woven materials and the like.

The utility model discloses a linkage type yarn conveying device which comprises a transmission shaft, a first transmission wheel, a second transmission wheel, a yarn pressing wheel and a yarn winding drum, the first transmission wheel, the second transmission wheel, the yarn pressing wheel and the yarn winding drum are arranged on the periphery of the transmission shaft in a sleeved mode, and the linkage type yarn conveying device further comprises a switcher and a linkage mechanism. The linkage mechanism is installed on the transmission shaft, and the two ends are connected with the switcher and the yarn winding barrel respectively. The switcher can be combined with the first transmission wheel or the second transmission wheel; when the switcher is combined with the first transmission wheel, the yarn conveyor can be suitable for non-fixed-length yarn supply work, and the switcher can be combined with the first transmission wheel or separated from the first transmission wheel under the action of the linkage mechanism. The linkage type yarn conveying device has the advantages of being high in applicability, low in cost, small in size, capable of saving energy, flexible in mode switching and the like.

The invention belongs to the technical field of textile, and relates to an efficient antibacterial fabric for preparing underwear and a dyeing and finishing method and application thereof.The provided antibacterial fabric is weft-knitted bird eye double-faced knitted fabric and is composed of polyester, cotton and modal fibers, the surface density is 180 g / m, surface yarn of the antibacterial fabric is hollow polyester fibers with special-shaped sections, and the surface yarn of the antibacterial fabric is hollow polyester fibers with special-shaped sections. The lining yarn is formed by weaving dacron and blended yarn according to the proportion of 2: 1. According to the method, dyeing and finishing of the antibacterial fabric, fabric weaving and ergonomic sewing are combined, the fabric which has efficient antibacterial performance, good moisture permeability and ultraviolet-proof performance and high color fastness is obtained, and the prepared antibacterial clothes are high in quick-drying performance, comfortable to wear and high in environmental adaptability.

The present invention provides a long-short carbon nanotube reinforced and toughened fiber composite material and a preparation method thereof. The preparation method provided by the present invention comprises: a) mixing short carbon nanotubes, a thermosetting resin and an additive to obtain a resin-based slurry; b) pouring the resin-based slurry into a fiber preform and curing and forming it to obtain a long-short carbon nanotube reinforced and toughened fiber composite material; wherein: the fiber preform comprises: an upper fiber cloth layer, a long carbon nanotube fiber yarn layer, and a lower fiber cloth layer stacked and contacted in sequence; the long carbon nanotube fiber yarn layer is a yarn-like structure formed by long carbon nanotubes; the length of the short carbon nanotubes is 0.5 to 3 μm, and the average length is ≤2 μm; the length of the long carbon nanotubes is 50 to 1000 μm, and the average length is >100 μm. The present invention optimizes the spatial layout of long and short carbon nanotubes in the composite material, simultaneously achieving the dual purposes of intra-layer reinforcement and inter-layer toughening of the fiber composite material.

The invention relates to the field of school uniform fabric production, in particular to a preparation method of an environment-friendly quick-drying school uniform fabric, which comprises the following preparation steps: S1: material selection, S2: fiber functionalization treatment, S21: plasma surface modification, S22: enzymatic polishing, S3: blended yarn preparation and fabric weaving, S4: fabric dyeing, S5: multifunctional composite finishing, S51: spraying of a waterborne polyurethane coating, S52: ozone washing water softening, s6, carrying out post-treatment; the regenerated polyester, the organic cotton and other raw materials are adopted, the regenerated polyester is made of recycled PET plastic bottles and is environmentally friendly and economical, polar groups on the surface of the regenerated polyester are activated through plasma surface modification, the hygroscopicity is greatly improved, the quick-drying performance is enhanced, and by means of a unique double-layer honeycomb mesh structure and a double-strand yarn optimization treatment mode, the moisture absorption performance is greatly improved. A multidirectional moisture guiding channel is formed, and the moisture evaporation rate is increased, so that the prepared school uniform fabric is environment-friendly, durable and comfortable while maintaining high-breathability and quick-drying performance.

The invention relates to the technical field of layered composite fabrics, in particular to a bio-based antibacterial fiber fabric and a preparation method thereof. The preparation method comprises the following steps: carrying out a reaction on diisocyanate, polyether polyol, bio-based polyester polyol and hexamidine dihydroxyethyl sulfonate in N, N-dimethylacetamide, so as to obtain a polyurethane prepolymer solution; 2-(4-aminophenyl)-5-aminobenzimidazole and amino-modified nano-zinc oxide are sequentially added into the polyurethane prepolymer solution for a reaction, a prepared polyurethane spinning solution is subjected to dry spinning to prepare polyurethane fibers, and then the polyurethane fibers are sequentially spun into yarn and fabric; the bio-based nylon is subjected to melt spinning to obtain bio-based nylon fibers, and the bio-based nylon fibers are sequentially spun into yarns and fabrics; the bio-based antibacterial fiber fabric is prepared by taking a polyurethane fabric as an inner-layer fabric and taking a bio-based chinlon fabric as an outer-layer fabric, and the fabric is good in antibacterial performance and moisture absorption performance.