Method for preparing high-performance warp-knitted net of biomimetic spider web structure

Abstract

This application relates to a method for preparing a high-performance warp-knitted web with a biomimetic spiderweb structure, and pertains to the textile field. This method is applicable to irregularly shaped web warp knitting machines, which include a bobbin frame, a guide bar moving mechanism located on one side of the bobbin frame, guide needles mounted on the guide bar moving mechanism, a needle rail located below the guide bar moving mechanism, a clamp installed within the track of the needle rail, a latch needle for knitting yarn into loops and connecting the loops to form a knitted fabric, and an integrated control system for setting process parameters and controlling the coordinated operation of each component. By using warp knitting technology to weave a biomimetic spiderweb structure material, production efficiency is greatly improved, production costs are reduced, and large-scale production and application are facilitated.

Description

Technical Field

[0001] This application relates to the field of textile technology, and in particular to a method for preparing a high-performance warp-knitted web with a biomimetic spider web structure. Background Technology

[0002] Compared to other textile structural materials, mesh materials offer advantages such as lightweight, breathability, high strength, and durability. Beyond traditional apparel and home textiles, mesh materials are widely used in sporting goods, building materials, medical supplies, aerospace, and other industrial applications, finding their way across water, land, and air. Mesh materials are frequently used in protection and containment to prevent people or objects from falling or to reduce impact. During use, they withstand not only static loads but also varying degrees of instantaneous dynamic impacts. In nature, spider webs exhibit excellent impact resistance, resisting the instantaneous impact of prey. This is related not only to the complex hierarchical structure of spider silk but also to the near-perfect geometry of the spider web. The regular geometry of the spider web facilitates force transmission and energy dissipation. Currently, research on biomimetic spider web structural materials is limited. The fabrication of biomimetic spider web structures primarily relies on 3D printing and 4D printing, which results in high production costs and low efficiency, hindering large-scale production and industrial application.

[0003] Traditional textile web materials can be categorized into knotted webs, machine-woven webs, warp-knitted knotless webs, braided knotless webs, and twisted knotless webs. Traditional web materials typically have conventional shapes, such as rhombuses, rectangles, and hexagons. Research and development of biomimetic spider web structures are currently lacking. Compared to other structures, warp-knitted knotless webs are a type of mesh knitted structure woven using Raschel warp knitting machines. Besides their stable mesh structure, smooth surface, and lightweight softness, this material exhibits excellent performance in energy absorption and material deformation. Spider web structures involve multi-directional continuous loops, making warp knitting extremely challenging. Furthermore, the raw materials for web materials include conventional fibers such as polyester and nylon, high-performance fibers such as ultra-high molecular weight polyethylene and aramid, and other fibers such as metal wires. High-performance fibers are high-strength, high-toughness, high-temperature resistant, corrosion-resistant, and wear-resistant, and are widely used in composite materials, aerospace, and marine industries, but their application in warp-knitted webs is still in its early stages.

[0004] Therefore, although it is extremely difficult to weave a high-performance warp-knitted web with a biomimetic spider web structure by selecting high-performance fibers and combining them with warp knitting technology, it has great application value and broad application prospects. Summary of the Invention

[0005] The purpose of this application is to provide a method for preparing high-performance warp-knitted mesh with a biomimetic spider web structure, in order to solve the problems of conventional mesh materials having conventional structures, small deformation, and poor impact resistance, as well as the high production cost, low production efficiency, and inability to be mass-produced and applied by biomimetic spider web structure materials prepared by 3D printing, 4D printing and other methods.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] On the one hand, this application provides a method for preparing a high-performance warp-knitted web with a biomimetic spider web structure. The method is applicable to warp knitting machines with irregular web shapes. The warp knitting machine with irregular web shapes includes a bobbin frame, a guide bar moving mechanism located on one side of the bobbin frame, a yarn guide needle mounted on the guide bar moving mechanism, a needle rail located below the guide bar moving mechanism, a clamp installed in the track of the needle rail, a latch needle for knitting yarn into loops and connecting the loops into a knitted fabric, and an integrated control system for setting process parameters and controlling the cooperation of each component.

[0008] The method includes:

[0009] S1. Based on the finished product requirements, design relevant process parameters using an integrated control system and control the coordinated operation of each component;

[0010] S2. The high-performance fiber is unwound from the bobbin and reaches the tongue needle after passing through the guide needle. The tongue needle makes a circular motion along the first circumferential track and begins to weave the first spiral.

[0011] S3. In response to the completion of the first spiral weaving, the latch needle moves outward along the first radial track to begin weaving the first radial line;

[0012] S4. In response to the tongue needle reaching the second circumferential track, the tongue needle moves clockwise along the second circumferential track to begin weaving the second spiral.

[0013] S5. In response to the latch needle being woven to the second radial track, the latch needle moves along the second radial track toward the first circumferential track until it connects with the first spiral.

[0014] S6. In response to the connection of the tongue needle with the first spiral, the tongue needle moves along the second radial track to the second circumferential track to continue weaving the second spiral;

[0015] S7. In response to the latch needle weaving to the third radial track, repeat steps S5 to S6 until the latch needle returns to the first radial track and connects with the first radial line to weave a complete second spiral.

[0016] S8. Repeat steps S3 to S7 to continue weaving the remaining spiral and radial lines until a high-performance warp-knitted web with a complete biomimetic spider web structure is woven.

[0017] In one possible implementation, step S2, in which the tongue needle moves in a circle along the first circumferential track, includes:

[0018] Step S21: In response to the upward retraction of the tongue needle, the old coil is held by the clamp. After the tongue needle rises to the position, it pauses for a preset time. At this time, the comb moving mechanism drives the yarn guide needle to move and wrap the high-performance fiber around the tongue needle to complete the yarn padding.

[0019] Step S22: In response to the completion of the padding by the high-performance fiber wrapped around the tongue needle, the tongue needle descends;

[0020] Step S23: In response to the tongue needle descending to a position lower than the old coil, it moves forward, a new coil is formed, and the holder clamps the new coil;

[0021] Step S24: Repeat steps S21 to S23 above to achieve circular motion.

[0022] In one possible implementation, the guide needle has a guide hole for guiding the high-performance fiber to perform a padding motion.

[0023] In one possible implementation, the high-performance fiber includes at least one or more of aramid, ultra-high molecular weight polyethylene, basalt fiber, and carbon fiber.

[0024] In one possible implementation, the fiber morphology of the high-performance fiber includes at least one of staple yarn, monofilament, multifilament, and braided yarn.

[0025] In one possible implementation, the comb moving mechanism is a robotic arm used to move along a fixed trajectory according to a program setting to cooperate with the tongue needle in forming a circle.

[0026] In one possible implementation, the tongue needle is moved by a transmission mechanism, the transmission mechanism comprising:

[0027] A drive slide rail, parallel to and identical in shape to the needle rail, is disposed below the needle rail; and

[0028] A frictionless crankshaft slidably connected to the drive slide rail;

[0029] The tongue needle is driven to move by the frictionless crankshaft.

[0030] On the other hand, this application provides a high-performance warp-knitted web with a biomimetic spider web structure, which is prepared by the preparation method of the high-performance warp-knitted web with a biomimetic spider web structure according to any one of claims 1 to 7, and the high-performance warp-knitted web with a biomimetic spider web structure is composed of a plurality of spiral lines and a plurality of radial lines.

[0031] The beneficial effects of the technical solution provided in this application include at least the following:

[0032] By using warp knitting technology to weave biomimetic spider web structure materials, production efficiency is greatly improved and production costs are reduced, which is conducive to large-scale production and application. Traditional textile mesh materials have conventional mesh shapes, small deformation, poor impact resistance, and mechanical properties that cannot meet certain needs. Inspired by the structure of spider webs, biomimetic spider web structure materials have regular geometric structures that are conducive to force transmission and energy dissipation, and their mechanical properties are superior to existing structural materials. High-performance warp-knitted biomimetic spider web structures have excellent designability. By controlling the type and thickness of raw materials, weaving parameters, weaving processes, and surface treatment processes, different specifications of mesh can be produced for different applications. Attached Figure Description

[0033] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the embodiments of the present application to explain the application and do not constitute a limitation thereof. In the drawings:

[0034] Figure 1 This invention provides a schematic diagram of the structure of a warp knitting machine with irregular mesh patterns, as illustrated in an exemplary embodiment of this application.

[0035] Figure 2 A partial structural schematic diagram of the needle rail and transmission mechanism of a warp knitting machine with irregular mesh provided in an exemplary embodiment of this application is shown;

[0036] Figure 3 A flowchart illustrating a method for fabricating a high-performance warp-knitted web with a biomimetic spiderweb structure provided in an exemplary embodiment of this application is shown.

[0037] Figure 4 This illustration shows a schematic diagram of the movement trajectory of the latch needle of a warp knitting machine with irregular mesh provided in an exemplary embodiment of this application;

[0038] Figure 5 This illustration shows a schematic diagram of the structure of a high-performance warp-knitted web with a biomimetic spider web structure provided in an exemplary embodiment of this application;

[0039] Figure 6 This application illustrates a weaving diagram of a high-performance warp-knitted web with a biomimetic spiderweb structure provided in an exemplary embodiment.

[0040] Figure 7The diagram shows the puncture test results of high-performance warp-knitted webs with knots and braided knotless webs with biomimetic spider web structures.

[0041] Figure 8 The test diagrams show the bursting performance of high-performance warp-knitted webs with biomimetic spider web structures of different material thicknesses;

[0042] In the picture:

[0043] 1. Yarn liner; 2. Comb moving mechanism; 3. Yarn guide needle; 4. Needle rail; 5. Clamping device; 6. Latch needle; 7. Integrated control system; 8. High-performance fiber; 9. Transmission mechanism; 10. High-performance warp-knitted web with biomimetic spider web structure;

[0044] 301. Yarn guide hole;

[0045] 401. First circumferential track; 402. First radial track; 403. Second circumferential track; 404. Second radial track; 405. Third radial track;

[0046] 901. Drive slide rail; 902. Frictionless crankshaft;

[0047] 1001, spiral line; 1002, radial line. Detailed Implementation

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] In this specification, identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions towards or away from a specific component, respectively. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "multiple" means two or more.

[0050] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0051] Figure 1 This illustration shows a structural schematic diagram of a warp knitting machine with irregular mesh patterns provided in an exemplary embodiment of this application. Figure 2 This illustration shows a partial structural diagram of the needle rail and transmission mechanism of a warp knitting machine with irregular mesh patterns provided in an exemplary embodiment of this application. (See also...) Figure 1 and Figure 2 The irregular mesh warp knitting machine includes a bobbin frame 1, a guide bar moving mechanism 2 located on one side of the bobbin frame 1, a guide needle 3 mounted on the guide bar moving mechanism 2, a needle rail 4 located below the guide bar moving mechanism 2, a clamp 5 mounted in the track of the needle rail 4, a tongue needle 6 for knitting yarn into loops and connecting the loops into a knitted fabric, and an integrated control system 7 for setting process parameters and controlling the cooperation of each component; wherein, the lower end of the guide needle 3 has a guide hole 301 for guiding high-performance fibers 8 to perform padding movement.

[0052] In one example, the comb moving mechanism 2 is implemented as a robotic arm, which moves along a fixed trajectory according to the program settings to cooperate with the tongue needle 6 to form a circle.

[0053] In this embodiment, the tongue needle 6 is driven to move by the transmission mechanism 9. The transmission mechanism 9 includes a drive slide rail 901 that is parallel to and has the same shape as the needle rail 4 and is disposed below the needle rail 4, and a frictionless crank shaft 902 that is slidably connected to the drive slide rail 901; wherein, the tongue needle 6 is driven to move by the frictionless crank shaft 902.

[0054] It is worth noting that the aforementioned components such as the bobbin frame 1, comb moving mechanism 2, needle rail 4, and transmission mechanism 9 are all connected to the frame of the irregular mesh warp knitting machine (not shown in the figure), and the frictionless crankshaft 902 slides on the drive slide rail 901 via the drive motor.

[0055] Figure 3 A flowchart illustrating a method for fabricating a high-performance warp-knitted web with a biomimetic spiderweb structure according to an exemplary embodiment of this application is shown. This method is applicable to the aforementioned irregular-shaped web warp-knitting machines. The method includes the following steps:

[0056] Step S1: Based on the finished product requirements, design relevant process parameters using the integrated control system 7, and control the coordinated operation of each component.

[0057] In this embodiment of the application, the size, number of spiral coils, number of radial lines, and density of the high-performance warp-knitted web with a biomimetic spider web structure are designed in the integrated control system 7. The needle rail is laid according to the set parameters, and the starting position and movement trajectory of the tongue needle and comb moving mechanism are set.

[0058] Step S2: The high-performance fiber 8 is unwound from the bobbin 1, passes through the guide needle 3 and reaches the tongue needle 6. The tongue needle 6 moves in a circular motion along the first circumferential track 401 and begins to weave the first spiral.

[0059] In this embodiment, the tongue needle 6 moves in a circle along the first circumferential track 401, specifically including:

[0060] Step S21: In response to the rise and retraction of the tongue needle 6, the old coil is held by the clamp 5. After the tongue needle 6 rises to the position, it pauses for a preset time. At this time, the comb moving mechanism 2 drives the yarn guide needle 3 to move and wrap the high-performance fiber 8 around the tongue needle 6 to complete the yarn padding.

[0061] Step S22: In response to the completion of the padding by wrapping the high-performance fiber 8 around the tongue needle 6, the tongue needle 6 descends;

[0062] Step S23: In response to the tongue needle 6 descending to a position lower than the old coil, it moves forward, a new coil is formed, and the holder 5 holds the new coil;

[0063] Step S24: Repeat steps S21 to S23 above to achieve circular motion.

[0064] In the embodiments of this application, the high-performance fiber 8 includes, but is not limited to, one or more of aramid, ultra-high molecular weight polyethylene, basalt fiber, and carbon fiber.

[0065] In the embodiments of this application, the fiber form of the high-performance fiber 8 includes, but is not limited to, one of staple yarn, monofilament, multifilament, and braided yarn.

[0066] Step S3: In response to the completion of the first spiral weaving (i.e., the first and last loops of the first spiral are connected), the latch needle 6 moves outward along the first radial track 402 to begin weaving the first radial line;

[0067] Step S4: In response to the latch needle 6 reaching the second circumferential track 403, the latch needle 6 moves clockwise along the second circumferential track 403 to begin weaving the second spiral.

[0068] Step S5: In response to the latch needle 6 being woven to the second radial track 404, the latch needle 6 moves along the second radial track 404 toward the first circumferential track 401 until it connects with the first spiral.

[0069] Step S6: In response to the connection between the latch needle 6 and the first spiral, the latch needle 6 moves along the second radial track 404 to the second circumferential track 403 to continue weaving the second spiral.

[0070] Step S7: In response to the latch needle 6 weaving to the third radial track 405, repeat steps S5 to S6 until the latch needle 6 returns to the first radial track 402 and connects with the first radial line to weave a complete second spiral.

[0071] Step S8: Repeat steps S3 to S7 to continue weaving the remaining spiral and radial lines until a complete biomimetic spider web structure high-performance warp-knitted web 10 is woven.

[0072] In this embodiment, the movement trajectory of the tongue needle 6 is described in detail below. Figure 4 Also, please see Figure 5 The high-performance warp-knitted web 10 with a biomimetic spider web structure is composed of several spiral lines 1001 and several radial lines 1002.

[0073] Optionally, the raw materials can be changed during the weaving process, and the type and thickness of the raw materials can be different for each loop, making the warp-knitted mesh highly designable.

[0074] It should be noted that the structure of the needle rail 4 and the drive slide rail 901 varies depending on the structural changes of the high-performance warp-knitted web with the biomimetic spider web structure woven according to the needs.

[0075] To better understand this application, the following explanation, in conjunction with the accompanying drawings and two-dimensional effect tests, will further illustrate this application.

[0076] Effect Test 1:

[0077] Using 600D aramid filament as raw material, high-performance warp-knitted webs with knitted webs, braided knotless webs, and the aforementioned biomimetic spiderweb structure were woven using various methods. The weaving diagrams are shown below. Figure 6 As shown, the same weight per unit area is ensured for each type of mesh by setting process parameters.

[0078] The biomimetic spider web structure warp-knitted web contains 7 spirals and 8 radials, with a size of 40cm×40cm. The number of spiral coils between the two radials from the inside out are 2, 3, 4, 5, 6, 8, and 10, respectively. The number of radial coils between the two spirals from the inside out are 2, 3, 4, 4, 5, and 5, respectively.

[0079] The bursting performance of the three types of nets was tested using a universal testing instrument. The experimental results are as follows: Figure 7 As shown, the biomimetic spider web structure warp-knitted web has the greatest deformation and the highest destructive strength, while the braided knotless web has the smallest deformation and the knotted web has the lowest destructive strength. It can be seen that the biomimetic spider web structure warp-knitted web woven by the above-mentioned high-performance biomimetic spider web structure preparation method has the best bursting performance.

[0080] Effect Test 2:

[0081] Three types of nets were woven using 600D, 1200D, and 1800D aramid filaments as raw materials, respectively, and employing the aforementioned method for preparing high-performance warp-knitted nets with a biomimetic spiderweb structure. The weaving diagrams are as follows: Figure 6 As shown, the size, number of spiral loops, and number of radial threads are all consistent, in order to investigate the effect of raw material fineness on the bursting performance of warp-knitted mesh. The experimental results are as follows: Figure 8As shown, the experimental results indicate that the coarser the raw material, the higher the strength and the greater the deformation.

[0082] In summary, the use of warp knitting technology to weave biomimetic spider web structure materials significantly improves production efficiency and reduces production costs, facilitating large-scale production and application. Traditional textile mesh materials have conventional mesh shapes, small deformation, poor impact resistance, and mechanical properties that cannot meet certain requirements. Inspired by the structure of spider webs, biomimetic spider web structure materials have regular geometric structures that facilitate force transmission and energy dissipation, resulting in superior mechanical properties compared to existing structural materials. High-performance warp-knitted biomimetic spider web structures offer excellent designability, allowing for the production of different specifications and applications by adjusting raw material types, thicknesses, weaving parameters, weaving processes, and surface treatments.

[0083] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for preparing a high-performance warp-knitted web with a biomimetic spider web structure, characterized in that, The method is applicable to irregular mesh warp knitting machines, which include a bobbin frame, a guide bar moving mechanism located on one side of the bobbin frame, a guide needle mounted on the guide bar moving mechanism, a needle rail located below the guide bar moving mechanism, a clamp installed in the track of the needle rail, a latch needle for knitting yarn into loops and connecting the loops into a knitted fabric, and an integrated control system for setting process parameters and controlling the cooperation of each component. The method includes: S1. Based on the finished product requirements, design relevant process parameters using an integrated control system and control the coordinated operation of each component; S2. The high-performance fiber is unwound from the bobbin and reaches the tongue needle after passing through the guide needle. The tongue needle makes a circular motion along the first circumferential track and begins to weave the first spiral. S3. In response to the completion of the first spiral weaving, the latch needle moves outward along the first radial track to begin weaving the first radial line; S4. In response to the tongue needle reaching the second circumferential track, the tongue needle moves clockwise along the second circumferential track to begin weaving the second spiral. S5. In response to the latch needle being woven to the second radial track, the latch needle moves along the second radial track toward the first circumferential track until it connects with the first spiral. S6. In response to the connection of the tongue needle with the first spiral, the tongue needle moves along the second radial track to the second circumferential track to continue weaving the second spiral; S7. In response to the latch needle weaving to the third radial track, repeat steps S5 to S6 until the latch needle returns to the first radial track and connects with the first radial line to weave a complete second spiral. S8. Repeat steps S3 to S7 to continue weaving the remaining spiral and radial lines until a high-performance warp-knitted web with a complete biomimetic spider web structure is woven.

2. The method for preparing a high-performance warp-knitted web with a biomimetic spider web structure according to claim 1, characterized in that, In step S2, the tongue needle moves in a circle along the first circumferential track, including: Step S21: In response to the upward retraction of the tongue needle, the old coil is held by the clamp. After the tongue needle rises to the position, it pauses for a preset time. At this time, the comb moving mechanism drives the yarn guide needle to move and wrap the high-performance fiber around the tongue needle to complete the yarn padding. Step S22: In response to the completion of the padding by the high-performance fiber wrapped around the tongue needle, the tongue needle descends; Step S23: In response to the tongue needle descending to a position lower than the old coil, it moves forward, a new coil is formed, and the holder clamps the new coil; Step S24: Repeat steps S21 to S23 above to achieve circular motion.

3. The method for preparing a high-performance warp-knitted web with a biomimetic spider web structure according to claim 2, characterized in that, The yarn guide needle has a yarn guide hole for guiding the high-performance fiber to perform a padding motion.

4. The method for preparing a high-performance warp-knitted web with a biomimetic spider web structure according to claim 1, characterized in that, The high-performance fiber includes at least one or more of aramid, ultra-high molecular weight polyethylene, basalt fiber, and carbon fiber.

5. The method for preparing a high-performance warp-knitted web with a biomimetic spider web structure according to claim 1, characterized in that, The fiber morphology of the high-performance fiber includes at least one of staple yarn, monofilament, multifilament, and braided yarn.

6. The method for preparing a high-performance warp-knitted web with a biomimetic spider web structure according to claim 1, characterized in that, The comb moving mechanism is a robotic arm used to move along a fixed trajectory according to a program setting to cooperate with the tongue needle to form a circle.

7. The method for preparing a high-performance warp-knitted web with a biomimetic spider web structure according to claim 1, characterized in that, The tongue needle is driven to move by a transmission mechanism, which includes: A drive slide rail, parallel to and identical in shape to the needle rail, is disposed below the needle rail; and A frictionless crankshaft slidably connected to the drive slide rail; The tongue needle is driven to move by the frictionless crankshaft.

8. A high-performance warp-knitted web with a biomimetic spider web structure, characterized in that, The high-performance warp-knitted mesh of the biomimetic spider web structure is prepared by the preparation method of the high-performance warp-knitted mesh of the biomimetic spider web structure according to any one of claims 1 to 7, and the high-performance warp-knitted mesh of the biomimetic spider web structure is composed of a plurality of spiral lines and a plurality of radial lines.

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