Preparation method of four-flat weft insertion knitted artificial ligament with reinforcing rib structure

Abstract

The invention relates to a preparation method of a four-flat weft insertion knitted artificial ligament with a reinforcing rib structure, and belongs to the field of biomedical materials. The preparation method of the four-pin weft insertion knitted artificial ligament with the reinforcing rib structure comprises the steps that S100, a flaky fabric is woven, the flaky fabric comprises a four-pin weft insertion knitted structure, and the four-pin weft insertion knitted structure serves as a framework of the artificial ligament; s200, weaving the reinforcing rib plied yarns, and inserting the reinforcing rib plied yarns into the woven sheet-shaped knitted fabric; and S300, rolling up the sheet-shaped fabric inserted with the reinforcing rib plied yarns to form the round-bar-shaped four-flat weft insertion knitted artificial ligament with the reinforcing rib structure. The bearing capacity, durability and dimensional stability of the artificial ligament can be improved, and tissue repair and integration are promoted.

Description

Technical Field

[0001] The present invention belongs to the technical field of biomedical materials, and in particular relates to a method for preparing a four-flat weft-inserted knitted artificial ligament with a reinforcing rib structure. Background Art

[0002] The anterior cruciate ligament (ACL) plays a key role in the knee joint, responsible for transmitting mechanical loads, stabilizing and guiding knee movement. Once the anterior cruciate ligament is ruptured, it will lead to knee instability and serious sequelae. The patient's knee movement function is limited, and in the late stage it may even develop into severe knee osteoarthritis, so surgical reconstruction is often required.

[0003] At present, the main transplant materials are autologous grafts, allogeneic grafts and artificial ligaments. Autologous grafts have problems such as donor site complications, unstable fixation, limited material acquisition and low biomechanical strength; although allogeneic grafts have certain advantages, they face problems such as high risk of infection, immune rejection, delayed healing, limited sources and high prices. Compared with autologous transplantation and allogeneic transplantation, artificial ligaments have simpler surgical operations, lower risks of rejection, no risk of disease transmission, and can accelerate microenvironment reconstruction and tissue repair at the implant site. However, in terms of mechanical properties, although there has been progress in the strength, elasticity and fatigue properties of artificial ligaments, they still cannot fully simulate the anisotropic properties of natural ligaments and their stability in long-term exercise.

[0004] Artificial ligament preparation technologies include electrospinning, braiding, weaving and knitting. Most of the current electrospinning scaffolds are too fragile to be surgically implanted or provide sufficient mechanical support to promote primary tendon healing. Braided ligaments are dimensionally stable and have good flexibility, strength and fatigue resistance, but the braiding process is relatively complex, there is a risk of wear after implantation, and fixation is difficult. Woven ligaments have appropriate mechanical strength, structural stability and design diversity, but their air permeability is relatively poor, they feel firm and have low elasticity. Knitted ligaments are soft, elastic and breathable, and their structure and surface properties are conducive to cell attachment, proliferation and migration. Compared with woven ligaments, knitted ligaments have a certain degree of flexibility in all directions, can better adapt to the complex movements of the joints, such as flexion and extension of the knee joint, rotation, etc., and reduce the limitation of joint movement caused by ligament stiffness. Compared with braided ligaments, knitted ligaments produce fewer wear particles during joint movement, thereby reducing the risk of iatrogenic arthritis caused by wear particles. However, knitted ligaments are made of coils strung together, and their structure is prone to deformation. Their dimensional stability needs to be strengthened, and their structure is relatively loose. Their mechanical strength is weaker than that of braided ligaments, and they may not be able to withstand excessive tension. When they are used in the preparation of artificial ligaments, the fabric structure design needs to be carefully considered. Summary of the Invention

[0005] The present invention application provides a preparation method of a four-way weft-knitted artificial ligament with a reinforcing rib structure, aiming to partially or completely solve the technical problems of insufficient mechanical strength and poor dimensional stability of knitted artificial ligaments in the prior art. The present invention application can improve the bearing capacity, durability and dimensional stability of artificial ligaments, and promote tissue repair and integration. To achieve the above object, the present invention adopts the following technical solutions:

[0006] A preparation method of a four-way weft-knitted artificial ligament with a reinforcing rib structure, comprising:

[0007] Step S100: Weave a sheet fabric, the sheet fabric includes a four-way weft-knitted structure, and the four-way weft-knitted structure serves as the skeleton of the artificial ligament;

[0008] Step S200: Weave a reinforcing rib strand, and insert the reinforcing rib strand into the woven sheet knitted fabric;

[0009] Step S300: Roll up the sheet fabric inserted with the reinforcing rib strand to form a round rod-shaped four-way weft-knitted artificial ligament with a reinforcing rib structure.

[0010] Optionally, step S100 includes: Weaving a sheet fabric on a computerized flat knitting machine. When weaving the sheet fabric, set the weaving speed to 0.7-1 m / s and the stitch density to 14-20 stitches. The sheet fabric is formed by connecting a number of mutually looped coils; the sheet fabric includes a four-way weft structure. When weaving the four-way structure, make the cam and the depth of yarn bending on the front and rear needle beds the same, and at the same time, the knitting needles alternately knit on the front and rear needle beds, and the insertion of the weft is carried out alternately, once on one side of the front needle bed and the next time on one side of the rear needle bed; the weft should be inserted when the knitting head exits the knitting area and the knitting needles complete the loop shedding and drop into the needle bed grooves, so that the weft can be correctly introduced into the middle of the front and rear needle bed teeth and located at the back of the knitting needles; at the same time, the feeding of the knitting yarn should be carried out after the weft is inserted, and the feeding position is opposite to the weft insertion position.

[0011] Optionally, step S200 includes: The knitting machine is a creel knitting machine, and a 4-16 creel knitting machine is used to weave the reinforcing rib strand.

[0012] Optionally, the raw material of the skeleton of the artificial ligament is selected from one or more of polyethylene terephthalate PET, polylactic acid, polycaprolactone, polyglycolic acid, polylactic acid-glycolic acid, and silk.

[0013] Optionally, the raw material of the reinforcing rib strand is selected from one or more of ultra-high molecular weight polyethylene, aramid fiber, and carbon fiber.

[0014] Optionally, multiple reinforcing rib strands are evenly distributed on the sheet fabric with a spiral lift angle α, where 0 < α ≤ 60°.

[0015] Optionally, in step S100, warp knitting technology or flat knitting technology is selected for knitting.

[0016] Optionally, in step S200, inserting the reinforcing strand into the knitted sheet fabric includes: during the knitting process, setting the knitting pattern on a flat knitting machine, and inserting the reinforcing strand along the weft direction of the fabric into the loops of the fabric; when inserting, the reinforcing strand will be guided through the loop gaps of the fabric, so that the reinforcing strand is evenly distributed in the sheet fabric, and then the reinforcing strand is inserted into the knitted sheet fabric by using the inlay method of the flat knitting machine;

[0017] Or, the operator uses tools to insert the reinforcing strands into the loops of the fabric one by one. When inserting, the operator adjusts the insertion angle and position of the reinforcing strands as needed, so that the reinforcing strands are evenly distributed in the sheet fabric, and then the reinforcing strands are inserted into the knitted sheet fabric by using the manual inlay method.

[0018] The beneficial effects obtained by this application of the present invention are as follows:

[0019] (1) In this application of the present invention, the good porosity of the knitted structure provides favorable conditions for cell adhesion, proliferation and migration, can accelerate the integration of the ligament with the surrounding tissues, promote tissue repair, and improve the surgical effect; the four-way weft inlay structure improves the disadvantage of the easy variability of the knitted loops, and endows the artificial ligament with a certain tensile strength, thereby effectively maintaining the stability of the joint.

[0020] (2) In this application of the present invention, the artificial ligament takes the four-way weft inlay knitted structure as the skeleton, and inserts the reinforcing strands for reinforcement, effectively improving the mechanical properties of the knitted ligament, having good mechanical properties and stable dimensions; at the same time, when the artificial ligament is subjected to external forces, it can effectively disperse stress and absorb energy, better withstand the tensile force generated by knee joint movement; the overall tensile strain of the reinforcing strand is small, which can balance part of the deformation generated during stretching of the knitted structure, improve the overall dimensional stability of the ligament, reduce the deformation in the joint, and ensure the normal exertion of its function; the number and fixing angle of the reinforcing strands can be flexibly adjusted according to different clinical application requirements, optimizing the mechanical properties and dimensional stability of the ligament to meet the needs of personalized medicine. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of this application of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 Schematic flow chart of a preparation method of a four - flat weft - inserted knitted artificial ligament with a reinforcing rib structure according to the present invention application;

[0023] Figure 2 Schematic structural diagram of a four - flat weft - inserted knitted artificial ligament with a reinforcing rib structure according to the present invention application;

[0024] Figure 3 Schematic diagram of the knitting machine for a four - flat weft - inserted knitting structure according to the present invention application;

[0025] Figure 4a Schematic front - side structural diagram of a four - flat weft - inserted knitting structure according to the present invention application;

[0026] Figure 4b Schematic back - side structural diagram of a four - flat weft - inserted knitting structure according to the present invention application;

[0027] Figure 5 Schematic diagram of the knitting principle of a reinforcing strand according to the present invention application;

[0028] Figure 6 Schematic side - view structural diagram of a sheet fabric with a reinforcing rib strand inserted according to the present invention application;

[0029] Figure 7 Schematic diagram of the formation principle of a circular - rod - shaped four - flat weft - inserted knitted artificial ligament with a reinforcing rib structure formed by rolling up a sheet fabric with a reinforcing rib strand inserted according to the present invention application;

[0030] The accompanying drawings are used to provide a further understanding of the present invention application, and constitute a part of the specification. Together with the embodiments of the present invention application, they are used to explain the present invention application, and do not constitute a limitation to the present invention application. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention application. Obviously, the described embodiments are only a part of the embodiments of the present invention application, rather than all of the embodiments; based on the embodiments in the present invention application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention application.

[0032] In the description of the present invention application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention application. "Including" can be understood as meaning only including. In order to make the purpose, technical solution and advantages of the present invention application clearer, the embodiments of the present invention application will be further described in detail below with reference to the drawings.

[0033] Description of the preparation method of a four-sided weft-knitted artificial ligament with a reinforcing rib structure

[0034] As Figures 1 to 7 shown, a preparation method of a four-way weft-knitted artificial ligament with a reinforcing rib structure includes:

[0035] Step S100: Weave a sheet fabric 10, the sheet fabric includes a four-way weft-knitted structure, and the four-way weft-knitted structure serves as the skeleton of the artificial ligament;

[0036] Step S200: Weave a reinforcing rib strand 20 and insert the reinforcing rib strand into the woven sheet fabric;

[0037] Step S300: Roll up the sheet fabric inserted with the reinforcing rib strand to form a round rod-shaped four-way weft-knitted artificial ligament with a reinforcing rib structure.

[0038] In some embodiments, the artificial ligament can be adjusted according to the requirements of different specific application scenarios. Different combinations of the thickness of the raw materials used, the number of weft knitting times, the number of spools for weaving the reinforcing ribs, and the number of inserted reinforcing ribs can be used to produce artificial ligaments with different structures.

[0039] In some embodiments, the round rod-shaped four-way weft-knitted artificial ligament can be used directly. The round rod-shaped four-way weft-knitted artificial ligament can be made to have cross-sectional shapes of different sizes through a shaping process. The shaping process can select one or more of suture treatment, adhesive fixation, hot pressing fixation, or cross-linking agent treatment according to the specific raw materials used.

[0040] In the application of the present invention, first of all, the good porosity of the knitted structure provides favorable conditions for cell attachment, proliferation and migration, which can accelerate the integration of the ligament with the surrounding tissues, promote tissue repair and improve the surgical effect; the four-bar weft insertion structure improves the disadvantage of the easy variability of the knitted loops and endows the artificial ligament with a certain tensile strength, thereby effectively maintaining the stability of the joint; in addition, the artificial ligament takes the four-bar weft insertion knitted structure as the framework and inserts reinforcing yarns for reinforcement, effectively improving the mechanical properties of the knitted ligament, with good mechanical properties and stable dimensions; furthermore, when the artificial ligament is subjected to external forces, it can effectively disperse stress and absorb energy, and better withstand the tensile force generated by the movement of the knee joint; the overall tensile strain of the reinforcing yarn is small, which can balance part of the deformation generated during stretching of the knitted structure, improve the overall dimensional stability of the ligament, reduce the deformation in the joint and ensure the normal functioning of its functions; the number and fixing angle of the reinforcing yarns can be flexibly adjusted according to different clinical application requirements to optimize the mechanical properties and dimensional stability of the ligament and meet the needs of personalized medicine.

[0041] Optionally, step S100 includes: knitting a sheet fabric on a computerized flat knitting machine. When knitting the sheet fabric, set the knitting speed to 0.7-1 m / s and the stitch density to 14-20 stitches. The sheet fabric is formed by connecting a number of interlooped coils; the sheet fabric includes a four-bar weft insertion structure. When knitting the four-bar structure, make the sinker cams and sinker depths of the front and rear needle beds the same, and at the same time, the knitting needles alternately knit on the front and rear needle beds, and the insertion of the weft alternates, once on one side of the front needle bed and the next time on one side of the rear needle bed; the weft should be inserted when the knitting head exits the knitting area and the knitting needles complete the loop shedding and drop into the needle bed grooves, so that the weft can be correctly introduced into the middle of the front and rear needle bed notches and be located at the back of the knitting needles; at the same time, the feeding of the knitting yarn should be carried out after the weft is inserted, and the feeding position is opposite to the weft insertion position.

[0042] In the present invention application, first, set the knitting speed to 0.7 - 1 m / s and the needle gauge to 14 - 20 needles. The knitting speed of the computerized flat knitting machine can at least refer to the speed of the carriage transverse movement, ensuring an efficient production rhythm, capable of forming a tight and uniform coil structure, enhancing the strength and flatness of the fabric. Additionally, when knitting a full-cardigan weft-laying structure, a design with the same cam for yarn bending and the same depth of yarn bending on the front and rear needle beds is adopted, ensuring the consistency of the knitting needles during the alternating knitting process, thereby reducing the defects and irregularities on the fabric surface. The alternating weft-laying method (once on the front needle bed and the next time on the rear needle bed) improves the stability and double-sided consistency of the fabric, making both sides of the fabric present a symmetrically beautiful effect. Moreover, the weft is laid when the knitting needle completes the loop release and descends into the needle bed groove, effectively avoiding the problems of weft misalignment or floating on the fabric surface, ensuring its accurate introduction between the teeth of the front and rear needle beds, located at the back of the knitting needle, enhancing the bonding force between the weft and the knitting yarn, and improving the overall tensile resistance of the fabric. Finally, the design with the feeding position of the knitting yarn opposite to the weft-laying position realizes the reasonable distribution and mutual support of the two materials, avoiding the uneven fabric thickness caused by material overlap and improving the weaving quality of the sheet fabric.

[0043] Optionally, step S200 includes: The knitting machine is a creel knitting machine, and a 4 - 16 creel knitting machine is used to knit the reinforcing strand.

[0044] In some embodiments, preferably, 8 creels can be used. Before operation, it is necessary to ensure that all components of the equipment are normal and well-lubricated, install the core wire and the take-up reel, and correctly place the upper creel skeleton and the lower creel skeleton. Subsequently, guide the thread head through each wire guiding component and fix it. When starting knitting, adjust the tension and pitch of the creel knitting machine to ensure the smooth progress of the knitting process of the creel knitting machine. During the entire knitting process, it is also necessary to pay attention to the safety operation regulations and regularly maintain the creel knitting machine to ensure the knitting quality and production safety.

[0045] Optionally, the raw material of the skeleton of the artificial ligament is selected from one or more of polyethylene terephthalate PET, polylactic acid, polycaprolactone, polyglycolic acid, polylactic acid-glycolic acid, and silk.

[0046] In the present invention application, PET has excellent mechanical properties and fatigue resistance, and can provide high-strength support for artificial ligaments, being suitable for long-term load-bearing requirements; biodegradable materials such as polylactic acid and polycaprolactone can gradually degrade in the body and be replaced by tissues, promoting autologous tissue repair and regeneration, and are particularly suitable for patients who need short-term support; polylactic acid-glycolic acid, as a composite material, has controllable degradability and good biocompatibility, optimizing the function of artificial ligaments; silk, as a natural polymer material, not only has excellent mechanical properties, but also, due to its protein structure being highly compatible with human tissues, can reduce immune rejection reactions and improve the implantation success rate. Thus, by using various materials alone or in combination for the framework of the artificial ligament, the mechanical strength, degradation rate, and biocompatibility of the artificial ligament can be adjusted according to specific needs, broadening its clinical application scope, providing personalized medical solutions, and having broad application prospects in fields such as preclinical anterior cruciate ligament reconstruction.

[0047] Optionally, the raw material of the reinforcing strand is selected from one or more of ultra-high molecular weight polyethylene, aramid fiber, and carbon fiber.

[0048] In the present invention application, ultra-high molecular weight polyethylene has extremely high wear resistance and tensile strength, and at the same time is light in weight and good in flexibility, being able to maintain good flexibility while providing strong support and reducing frictional damage to surrounding tissues; aramid fiber is famous for its excellent energy absorption ability and heat resistance, being able to effectively disperse external force impacts and reduce the risk of ligament rupture, and is particularly suitable for applications in high-intensity sports scenarios; carbon fiber has extremely high rigidity and stability, can provide strong structural support for artificial ligaments, and at the same time its bio-inert property ensures the safety of long-term implantation.

[0049] In some embodiments, by using the above materials alone or in a composite combination, the mechanical properties of the reinforcing strand can be flexibly adjusted to meet the specific needs of different patients. For example, UHMWPE can be preferentially used in parts that require high flexibility, aramid fiber can be selected in scenarios where impact absorption ability is emphasized, and carbon fiber can be introduced when high-strength support is pursued. This multi-material combination strategy not only improves the comprehensive performance of artificial ligaments, but also broadens their clinical indication scope, providing a more reliable and personalized solution for orthopedic repair.

[0050] Optionally, in step S100, warp knitting technology or weft knitting technology is selected for knitting.

[0051] In the application of the present invention, in step S100, warp knitting technology or weft knitting technology is selected, which combines high efficiency and flexibility. Warp knitting technology forms tight coils, improving the stability and tensile strength of the fabric, and is suitable for high-strength scenarios; weft knitting technology provides excellent flexibility and elasticity, facilitating local performance optimization. The combination of the two can adjust the fabric characteristics according to requirements, achieving higher functionality and applicability to meet diverse application requirements.

[0052] Optionally, multiple reinforcing strand wires are uniformly distributed on the sheet fabric at a helix angle α, where 0 < α ≤ 60°.

[0053] In the application of the present invention, first of all, through the helical distribution, the reinforcing strand wires can disperse external forces in multiple directions, avoiding stress concentration, thereby enhancing the tensile and shear resistance of the artificial ligament and making it more suitable for withstanding complex stress environments; at the same time, the uniformly distributed reinforcing strand wires ensure the consistency of the mechanical properties of each part of the artificial ligament, improving the mechanical properties and structural stability of the artificial ligament; in addition, the design with the helix angle α satisfying 0 < α ≤ 60° can be adjusted according to actual needs, flexibly optimizing the rigidity and flexibility of the artificial ligament, and trying to simulate the performance of natural tissues to meet the functional requirements of different application scenarios.

[0054] Optionally, in step S200, inserting the reinforcing strand wires into the knitted sheet fabric includes: during the knitting process, setting the knitting pattern on a computerized flat knitting machine, and inserting the reinforcing strand wires along the weft direction of the fabric into the loops of the fabric; when inserting, the reinforcing strand wires will be guided through the loop gaps of the fabric, so that the reinforcing strand wires are uniformly distributed in the sheet fabric, and then the reinforcing strand wires are inserted into the knitted sheet fabric by using the inlay method of the computerized flat knitting machine; or, an operator uses tools (such as a crochet hook or other auxiliary tools) to insert the reinforcing strand wires into the loops of the fabric one by one. When inserting, the operator adjusts the insertion angle and position of the reinforcing strand wires according to needs, so that the reinforcing strand wires are uniformly distributed in the sheet fabric, and then the reinforcing strand wires are inserted into the knitted sheet fabric by using the manual inlay method.

[0055] What is shown in the drawings is only one of the implementation manners of the application of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the purpose of the creation of the application of the present invention, they shall fall within the protection scope of the application of the present invention.

Claims

1. A method for preparing a four-level weft-inserted knitted artificial ligament with a reinforcing rib structure, characterized in that: include: Step S100: weaving a sheet fabric, wherein the sheet fabric includes a four-flat weft-inserted knitted structure, and the four-flat weft-inserted knitted structure serves as a skeleton of the artificial ligament; Step S200: weaving the reinforcing rib strands, and inserting the reinforcing rib strands into the woven sheet-like knitted fabric; Step S300: rolling up the sheet-like fabric into which the reinforcing rib strands are inserted to form a round-rod-shaped four-flat weft-inserted artificial ligament with a reinforcing rib structure.

2. The method for preparing a four-flat weft knitted artificial ligament with a reinforcing rib structure according to claim 1, characterized in that: Step S100 includes: weaving a sheet fabric on a computer flat knitting machine, when weaving the sheet fabric, setting the weaving speed to 0.7-1 m / s, the needle pitch to 14-20 needles, and the sheet fabric is connected by a plurality of mutually interlaced coils; the sheet fabric includes a four-level weft insertion structure, when weaving the four-level structure, the bending yarn triangle and the bending yarn depth of the front and rear needle beds are made the same, and the knitting needles are alternately knitted on the front and rear needle beds, and the weft thread is inserted alternately, once on the front needle bed side and the next time on the rear needle bed side; the weft thread should be inserted after the knitting machine head exits the knitting area and the knitting needle completes the loop removal and drops into the needle bed groove, so that the weft thread can be correctly introduced into the middle of the front needle bed and the rear needle bed teeth, and is located at the needle back position of the knitting needle; at the same time, the knitting yarn should be fed after the weft thread is inserted, and the feeding position is opposite to the weft thread insertion position.

3. The method for preparing a four-flat weft knitted artificial ligament with a reinforcing rib structure according to claim 2, characterized in that: Step S200 includes: the braiding machine is a bobbin braiding machine, and the reinforcing rib strands are braided using a 4-16 bobbin braiding machine.

4. The method for preparing a four-flat weft knitted artificial ligament with a reinforcing rib structure according to claim 2, characterized in that: The raw material of the skeleton of the artificial ligament is selected from one or more of polyethylene terephthalate PET, polylactic acid, polycaprolactone, polyglycolic acid, polylactic acid-glycolic acid, and silk.

5. The method for preparing a four-flat weft knitted artificial ligament with a reinforcing rib structure according to claim 2, characterized in that: The raw material of the reinforcing rib strands is selected from one or more of ultra-high molecular weight polyethylene, aramid fiber and carbon fiber.

6. The method for preparing a four-flat weft knitted artificial ligament with a reinforcing rib structure according to claim 2, characterized in that: A plurality of reinforcing rib strands are uniformly distributed on the sheet fabric at a helix angle α, 0<α≤60°.

7. The method for preparing a four-flat weft knitted artificial ligament with a reinforcing rib structure according to claim 2, characterized in that: In step S100, warp knitting technology or flat knitting technology is selected for weaving.

8. The method for preparing a four-flat weft knitted artificial ligament with a reinforcing rib structure according to claim 2, characterized in that: In step S200, inserting the reinforcing rib strands into the knitted sheet-like knitted fabric includes: during the knitting process, according to the knitting rule set on the computer flat knitting machine, inserting the reinforcing rib strands into the coils of the fabric along the weft direction of the fabric; when inserting, the reinforcing rib strands are guided to pass through the coil gaps of the fabric, so that the reinforcing rib strands are evenly distributed in the sheet-like fabric, thereby completing the insertion of the reinforcing rib strands into the knitted sheet-like knitted fabric using the computer flat knitting machine inserting method; Alternatively, the operator uses a tool to insert the reinforcing rib strands into the coils of the fabric one by one. During the insertion, the operator adjusts the insertion angle and position of the reinforcing rib strands as required, so that the reinforcing rib strands are evenly distributed in the sheet fabric, thereby completing the insertion of the reinforcing rib strands into the woven sheet knitted fabric by manual lining.

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