A multi-layer flexible knitted stab-resistant fabric and a method of making the same

Abstract

The application relates to a multilayer flexible knitted anti-puncture fabric and a preparation method thereof, and belongs to the technical field of protective textile materials. The preparation method of the multilayer flexible knitted anti-puncture fabric comprises the following steps: step S100, weaving an anti-puncture surface layer and a first anti-puncture intermediate layer; step S200, connecting the anti-puncture surface layer and the first anti-puncture intermediate layer to form a first insert accommodating part; step S300, weaving a second anti-puncture intermediate layer; step S400, connecting the first anti-puncture intermediate layer and the second anti-puncture intermediate layer to form a second insert accommodating part; and step S500, weaving a weft-inserted buffer layer and a skin-friendly inner layer, wherein the second anti-puncture intermediate layer is provided with the weft-inserted buffer layer between the second anti-puncture intermediate layer and the skin-friendly inner layer, and the second anti-puncture intermediate layer is connected to the skin-friendly inner layer. The multilayer flexible knitted anti-puncture fabric provided by the application has the anti-puncture function, does not need to be bonded, has simple production procedures, high efficiency and environmental protection, and has wide market prospects and application value.

Description

Technical Field

[0001] This invention application belongs to the field of structural biomimetic textile materials technology, specifically relating to a multi-layer flexible knitted stab-resistant fabric and its preparation method. Background Technology

[0002] The application scenarios for stab-resistant vests are gradually increasing. Police officers, riot police, security personnel, fencers, and those in high-risk industries all require specialized protective equipment to ensure their safety. Therefore, stab-resistant vests have become a hot research topic. Existing methods for manufacturing stab-resistant vests typically include: impregnation methods with resin coatings, methods of attaching fabrics to hard materials (such as ceramics, resins, metal alloys, or other hard blocks or particles), methods of bonding fabrics to stab-resistant patches, and methods of bonding multiple layers of fabric. While these methods ensure the basic performance of stab-resistant vests to a certain extent, with the continuous expansion of application scenarios and further increases in protection requirements, the shortcomings of existing stab-resistant vests and their manufacturing methods in terms of flexibility, durability, and lightweighting are gradually becoming apparent.

[0003] In resin coating or impregnation methods, resin coating or impregnation can increase the hardness and puncture resistance of the fabric. However, due to the rigidity of the resin itself, the garment often lacks sufficient softness and comfort. In the method of attaching and bonding hard materials, hard materials such as ceramics, resins, and metal alloys are attached to the surface of the fabric. Although this can effectively improve the puncture resistance, these hard materials may increase the weight of the puncture-resistant garment, affecting wearing comfort and flexibility. In addition, it often requires additional layers, making the garment bulky.

[0004] Adhesives are used in the bonding method between fabric and stab-resistant strips to achieve good stab protection. However, adhesives have poor durability, and their stab protection performance may decline over time. Moreover, the bonded parts may wear down or fall off during long-term use. For example, patent CN114407446A discloses a fabric with an abrasion-resistant and stab-resistant structure: spraying adhesive onto three layers of stab-resistant fabric and pressing them together. The resulting abrasion-resistant and stab-resistant fabric is breathable and lightweight, but the fabric preparation process is complex, and the adhesive has poor durability and environmental friendliness. Patent CN114434936A discloses a puncture-resistant material and puncture-resistant fabric structure: bonding a base fabric to a stab-resistant strip and bonding a hollow fiber tube. Although the hollow structure can reduce weight, it increases the thickness of the fabric, affecting the flexibility of wearing the puncture-resistant fabric. The bonding operation also suffers from poor durability.

[0005] Multi-layer fabric bonding methods bond multiple layers of fabric into a composite structure, increasing the number of protective layers in stab-proof clothing and theoretically providing stronger stab protection. However, the multi-layer structure increases the fabric thickness, reducing the garment's breathability and comfort, thus affecting the wearing experience. For example, patent CN112432556A discloses an overlapping stab-proof fabric and its preparation method, which involves bonding a base fabric to a first and a second protective sheet, with the first and second protective sheets overlapping to avoid blind spots in stab protection. While the overlapping stab-proof fabric can block direct injury from the blade tip when pierced by a knife, the impact force from the stab-proof sheet on the body is still relatively large, resulting in poor wearing comfort. Furthermore, it cannot avoid the poor durability issues caused by bonding.

[0006] Therefore, in view of the problems in the existing methods for preparing stab-proof clothing, the present invention provides a multi-layer flexible knitted stab-proof fabric and its preparation method. Summary of the Invention

[0007] This invention application proposes a multi-layer flexible knitted stab-resistant fabric preparation device and method, aiming to partially or completely solve the technical problems in existing stab-resistant garment preparation methods. The technical solution of this invention application is as follows:

[0008] In a first aspect, a multi-layer flexible knitted stab-resistant fabric includes: a stab-resistant outer layer, a first insert receiving portion, a first stab-resistant intermediate layer, a second insert receiving portion, a second stab-resistant intermediate layer, a weft-inserted buffer layer, and a skin-friendly inner layer. The stab-resistant outer layer is connected to the first stab-resistant intermediate layer and forms the first insert receiving portion; the first stab-resistant intermediate layer is connected to the second stab-resistant intermediate layer and forms the second insert receiving portion; the second stab-resistant intermediate layer is connected to the skin-friendly inner layer, and a weft-inserted buffer layer is provided between the second stab-resistant intermediate layer and the skin-friendly inner layer. The first insert receiving portion includes a plurality of first receiving portions, each capable of accommodating a first insert; the second insert receiving portion includes a plurality of second receiving portions, each capable of accommodating a second insert; both the first insert and the second insert include a rigid block, the material of which includes at least one of ceramic, resin, metal, and alloy.

[0009] Optionally, along the first direction, a plurality of first inserts are spaced apart, a plurality of second inserts are spaced apart, and the first inserts and second inserts are staggered.

[0010] Optionally, the stab-resistant outer layer is connected to the first stab-resistant intermediate layer to form a first connecting portion, the first connecting portion including a plurality of first connecting coils; the first stab-resistant intermediate layer is connected to the second stab-resistant intermediate layer to form a second connecting portion, the second connecting portion including a plurality of second connecting coils; the skin-friendly inner layer is connected to the second stab-resistant intermediate layer to form a third connecting portion, the third connecting portion including a plurality of third connecting coils.

[0011] In a second aspect, a method for preparing a multilayer flexible knitted stab-resistant fabric, comprising:

[0012] Step S100: Weave the puncture-resistant outer layer and the first puncture-resistant intermediate layer;

[0013] Step S200: The puncture-resistant outer layer and the first puncture-resistant intermediate layer are connected to form the first insert receiving portion;

[0014] Step S300: Weave the second puncture-resistant intermediate layer;

[0015] Step S400: The first puncture-resistant intermediate layer and the second puncture-resistant intermediate layer are connected to form the second insert receiving portion;

[0016] Step S500: Weave a weft-inserted buffer layer and a skin-friendly inner layer. A weft-inserted buffer layer is provided between the second puncture-resistant intermediate layer and the skin-friendly inner layer. The second puncture-resistant intermediate layer is connected to the skin-friendly inner layer.

[0017] Optionally, step S100 includes:

[0018] Step S101: Use the odd-numbered needles of the back knitting bed of the four-needle bed to knit the puncture-resistant outer layer. The raw material of the puncture-resistant outer layer is polyethylene yarn. The yarn loop length of the four-needle bed is set to 6.5. When knitting the odd-numbered needles of the back knitting bed, the loops of the even-numbered needles of the back knitting bed are temporarily transferred to the front upper needle bed.

[0019] Step S102: Knit the first puncture-resistant intermediate layer using the even number of needles on the back knitting bed of a four-needle bed. The raw material for the first puncture-resistant intermediate layer is polyethylene yarn, and the loop length of the yarn on the four-needle bed is set to 6.5.

[0020] Optionally, step S200 includes: knitting such that the anti-puncture surface layer and the first anti-puncture intermediate layer are connected to form a first connecting portion, the loops on the 2i-th and 2j-th needles of the rear needle bed from left to right are not transferred, j is greater than i, and i and j are both positive integers, correspondingly, the first connecting loop of the first connecting portion includes the loops on the 2i-th and 2j-th needles of the front needle bed that are not transferred, the anti-puncture surface layer and the first anti-puncture intermediate layer are connected together through the first connecting loop of the first connecting portion to form a first insert receiving portion; the first insert receiving portion includes a plurality of first receiving portions separated between the anti-puncture surface layer and the first anti-puncture intermediate layer by the first connecting loop, and the first receiving portion is a cavity region.

[0021] Optionally, step S400 includes: knitting such that the first anti-puncture intermediate layer and the second anti-puncture intermediate layer are connected to form a second connecting portion, the loops on the 2m and 2n needles of the back needle bed from left to right, where n is greater than m and n and m are both positive integers, the second connecting loop of the second connecting portion is formed by knitting the front odd number needle loops into loops on the 2m and 2n needles of the back needle bed, the first anti-puncture intermediate layer and the second anti-puncture intermediate layer are connected together by the second connecting loop of the second connecting portion to form a second insert receiving portion; the second insert receiving portion is a plurality of second receiving portions separated between the first and second anti-puncture intermediate layers by the second connecting loop, and the second receiving portion is a cavity area.

[0022] Optionally, step S500 includes:

[0023] Step S501: Use the even number of needles on the front lower needle bed of the four-needle bed to knit the skin-friendly inner layer. The material of the skin-friendly inner layer is at least one of wool, cotton, or blended yarn. Two yarns are fed in, and the yarn loop length on the four-needle bed is set to 6.2. During knitting, the odd number of loops need to be temporarily transferred to the back upper needle bed.

[0024] Step S502, the weft buffer layer is a floating yarn structure in the cavity area between the skin-friendly inner layer and the second anti-puncture intermediate layer. The raw material of the weft buffer layer is at least one of polyester bulky yarn and acrylic bulky yarn. During weaving, the odd-numbered loops that were temporarily transferred to the upper needle bed in step S501 are turned back to the lower needle bed to press down the long floating yarn and ensure the padding angle of the floating yarn structure.

[0025] In step S503, while knitting in step S501, the front odd-numbered needles are knitted in a loop according to a preset knitting pattern, so that the skin-friendly inner layer and the second puncture-proof intermediate layer are connected according to the preset knitting pattern to form a third connecting part, the third connecting part including a polygonal connecting area.

[0026] Optionally, ji = p, nm = q, the numerical range of p is 2 ≤ p ≤ 6, and the numerical range of q is 2 ≤ q ≤ 6.

[0027] The beneficial effects achieved by this invention application are as follows:

[0028] (1) In this invention application, by embedding hard blocks (e.g., ceramics, resins, metals or alloys) into the first receiving portion of the first insert receiving portion B and the second receiving portion of the second insert receiving portion D, the stab resistance of the fabric is effectively enhanced. These hard blocks can effectively disperse the piercing force and prevent the penetration of knives or sharp objects. This not only provides excellent stab protection, but also ensures the stability and durability of the fabric in long-term use by combining it with highly durable materials (e.g., ceramics, metals, alloys, etc.). This allows the multi-layer flexible knitted stab-resistant fabric to withstand multiple uses and external impacts, maintaining long-term protective performance. At the same time, the multi-layer flexible knitted stab-resistant fabric uses an innovative structural design, which does not require bonding. The production process is simple, efficient and environmentally friendly, achieving multi-layer flexibility, cushioning and protection. It can be applied not only to high-risk industries such as police, security, and fencing, but also to other scenarios requiring protection, such as outdoor sports and construction sites, providing comprehensive protection and meeting the diverse needs of different fields for stab-resistant clothing. It has broad market prospects and application value.

[0029] (2) In this invention application, by staggering the first insert and the second insert, it is possible to avoid sharp objects directly penetrating the weak points of the multi-layer flexible knitted stab-proof fabric in a single direction. When the first insert and the second insert are staggered, the protective forces in different directions complement each other, forming a more robust stab-proof barrier and enhancing the overall puncture resistance. At the same time, the spacing design of the first insert and the second insert allows the stab-proof fabric to maintain high flexibility and comfort. Through the reasonable spacing of the hard blocks, the weight of the stab-proof structure can be reduced, avoiding the excessive use of hard blocks and reducing the discomfort and burden caused by hard blocks to the wearer, thereby improving the wearer's wearing experience. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a three-dimensional exploded view of a multi-layer flexible knitted stab-resistant fabric according to the present invention. Figure 1 .

[0032] Figure 2 This is a three-dimensional exploded view of a multi-layer flexible knitted stab-resistant fabric according to the present invention. Figure 2 .

[0033] Figure 3 This is a three-dimensional exploded view of a multi-layer flexible knitted stab-resistant fabric according to the present invention. Figure 3 .

[0034] Figure 4a This invention provides a flowchart illustrating a method for preparing a multi-layer flexible knitted stab-resistant fabric. Figure 1 .

[0035] Figure 4b This invention provides a flowchart illustrating a method for preparing a multi-layer flexible knitted stab-resistant fabric. Figure 2 .

[0036] Figure 4c This invention provides a flowchart illustrating a method for preparing a multi-layer flexible knitted stab-resistant fabric. Figure 3 .

[0037] Figure 5 This is a schematic diagram showing the connection between the puncture-resistant surface layer and the first puncture-resistant intermediate layer of this invention.

[0038] Figure 6 This is a schematic diagram showing the connection between the first puncture-resistant intermediate layer and the second puncture-resistant intermediate layer of this invention.

[0039] Figure 7 This is a schematic diagram showing the connection between the weft buffer layer between the second puncture-resistant intermediate layer and the skin-friendly inner layer of this invention.

[0040] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0042] In the description of this invention application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention application. "Comprising" can at least be understood as including only. The sequence numbers of the steps (e.g., step S100, step S200, step S501, step S502, step S503, etc.) do not represent an indication or imply that the steps referred to must be performed in a strictly specific order; the order can be understood appropriately in conjunction with the specific content. To make the purpose, technical solution, and advantages of this invention application clearer, the embodiments of this invention application will be further described in detail below with reference to the accompanying drawings.

[0043] Description of multi-layer flexible knitted stab-resistant fabric

[0044] like Figures 1 to 3 As shown, in a first aspect, a multi-layer flexible knitted stab-resistant fabric includes a stab-resistant outer layer A, a first insert receiving portion B, a first stab-resistant intermediate layer C, a second insert receiving portion D, a second stab-resistant intermediate layer E, a weft-inserted buffer layer F, and a skin-friendly inner layer G. The stab-resistant outer layer A is connected to the first stab-resistant intermediate layer C and forms the first insert receiving portion B; the first stab-resistant intermediate layer C is connected to the second stab-resistant intermediate layer E and forms the second insert receiving portion B; a weft-inserted buffer layer F is provided between the second stab-resistant intermediate layer E and the skin-friendly inner layer G, and the second stab-resistant intermediate layer E is connected to the skin-friendly inner layer G. The first insert receiving portion B includes a plurality of first receiving portions, each capable of accommodating a first insert; the second insert receiving portion D includes a plurality of second receiving portions, each capable of accommodating a second insert; both the first insert and the second insert include a rigid block, the material of which includes at least one of ceramic, resin, metal, and alloy.

[0045] In some embodiments, the hard block in the first insert is made of at least one of ceramic, resin, metal, and alloy. For example, the hard block of the first insert is made of ceramic material. Ceramic has high hardness and penetration resistance, effectively preventing punctures from sharp objects, and is particularly suitable for high-intensity puncture protection, such as uniforms for police officers or security personnel. In this case, the first receiving portion of the first insert receiving portion B tightly encloses the ceramic hard block, ensuring that the hardness of the ceramic can be fully utilized to provide stable protection.

[0046] In some embodiments, the material of the hard block in the second insert is selected from at least one of ceramic, resin, metal, and alloy. For example, the hard block of the second insert can be made of metal alloy (e.g., titanium alloy or stainless steel). Metal alloys provide high-strength protection while also possessing good durability and lightweight properties, making them suitable for scenarios such as fencing where frequent movement and weight requirements are high. After the metal alloy hard block is combined with the second receiving portion of the second insert receiving portion D, it can effectively protect the wearer from injury during exercise while maintaining flexibility.

[0047] In some embodiments, the first stab-resistant intermediate layer C and the second stab-resistant intermediate layer E may be composed of multilayer composite materials, such as high-strength aramid fibers, polyester fibers, or polyethylene, which can provide additional cut resistance and, while providing stab protection, do not add excessive weight and thickness, thereby ensuring the softness and comfort of the fabric.

[0048] In some embodiments, the weft-insertion cushioning layer F uses foam, silicone, or fluffy materials that effectively absorb external impacts, reduce the direct impact of hard objects on the wearer's body, and counteract the impact of external knives or other punctures, preventing excessive injury and increasing wearer comfort. The design of the weft-insertion cushioning layer F ensures that the puncture-resistant fabric is skin-friendly when worn, reducing discomfort from prolonged wear.

[0049] Therefore, in the multi-layer flexible knitted stab-resistant fabric of this invention, firstly, by embedding hard blocks (e.g., ceramics, resins, metals, or alloys) into the first receiving portion of the first insert receiving portion B and the second receiving portion of the second insert receiving portion D, the stab-resistant performance of the fabric is effectively enhanced. These hard blocks can effectively disperse the piercing force and prevent penetration by knives or sharp objects, providing not only excellent stab protection but also ensuring the stability and durability of the fabric in long-term use by combining it with highly durable materials (such as ceramics, metals, alloys, etc.). This allows the multi-layer flexible knitted stab-resistant fabric to withstand repeated use and external impacts, maintaining long-term protective performance. Furthermore, the multi-layer flexible knitted stab-resistant fabric includes a knitting process, which makes the fabric… The overall structure is more compact and lightweight. Each layer of the multi-layered structure provides the fabric with flexibility, comfort, and breathability. The weft-insertion structure reduces the impact of external forces, helping to reduce the wearer's stuffiness and discomfort during wear or exercise, thus improving the fabric's comfort. In addition, the multi-layered flexible knitted stab-proof fabric uses an innovative structural design that requires no bonding, simplifies the production process, and is highly efficient and environmentally friendly. It achieves multi-layered flexibility, cushioning, and protection, making it suitable not only for high-risk industries such as policing, security, and fencing, but also for other protective scenarios such as outdoor sports and construction sites. It provides comprehensive protection, meeting the diverse needs of different fields for stab-proof clothing, and has broad market prospects and application value.

[0050] Optionally, the stab-resistant outer layer A is connected to the first stab-resistant intermediate layer C to form a first connecting portion H, the first connecting portion H including a plurality of first connecting coils; the first stab-resistant intermediate layer C is connected to the second stab-resistant intermediate layer E to form a second connecting portion I, the second connecting portion I including a plurality of second connecting coils; the skin-friendly inner layer G is connected to the second stab-resistant intermediate layer E to form a third connecting portion J, the third connecting portion J including a plurality of third connecting coils.

[0051] In some embodiments, the stab-resistant outer layer A, connected to the first stab-resistant intermediate layer C, forms a first connecting portion H. Multiple first connecting coils in the first connecting portion reinforce the stability and strength between the layers. Similarly, the first stab-resistant intermediate layer C is connected to the second stab-resistant intermediate layer E to form a second connecting portion I, and the skin-friendly inner layer G is connected to the second stab-resistant intermediate layer E to form a third connecting portion J. The multiple second connecting coils in the second connecting portion I and the multiple third connecting coils in the third connecting portion J further enhance the integrity of the overall protective structure. This effective combination of multi-layered structures not only improves stab resistance and increases the fabric's protective capabilities, enabling it to effectively prevent penetration by sharp objects in more complex and harsh environments.

[0052] In some embodiments, the use of multiple connecting coils increases the bonding force between layers, allowing the fabric layers to be tightly bonded together. This prevents slippage or loosening between layers from affecting the overall protective effect, enabling the fabric to maintain its original protective performance for extended periods and effectively withstand repeated use and high-intensity pressure. Simultaneously, the multiple connecting coil design gives the puncture-resistant fabric a degree of flexibility and adaptability while maintaining high-strength protection. Compared to traditional adhesive or overly rigid structures, the multiple connecting coil design makes the fabric softer and more elastic, better adapting to the body's movement needs and providing greater comfort, especially during prolonged wear, reducing discomfort. It is also more environmentally friendly and lower in cost, helping to reduce production costs and improve overall economic efficiency.

[0053] In some embodiments, the connection coils between each layer effectively prevent displacement or loosening of the fabric layers during long-term use, ensuring durable and reliable puncture resistance. Even after frequent stretching, bending, or abrasion, the fabric maintains its protective properties, enhancing product durability. Its thickness and flexibility can be adjusted to meet the protective needs of different working environments, such as high-risk locations like police, security, and construction sites. It is also suitable for everyday wear, demonstrating broad adaptability and market demand.

[0054] Optionally, along the first direction, a plurality of first inserts are spaced apart, a plurality of second inserts are spaced apart, and the first inserts and second inserts are staggered.

[0055] In some embodiments, along a first direction, a plurality of first inserts and a plurality of second inserts are distributed at predetermined intervals, and the first inserts and second inserts are staggered. The first direction may be the direction in which the plurality of first receiving portions are arranged, or the width direction or length direction of the fabric. When a sharp object (such as a blade, needle, etc.) comes into contact with the fabric, its piercing force not only needs to penetrate the plurality of first inserts and the plurality of second inserts, but also needs to overcome the staggered distribution and intervals of the first inserts and the plurality of second inserts. This greatly increases the difficulty of piercing the multi-layer flexible knitted puncture-resistant fabric, effectively preventing sharp objects from penetrating quickly and increasing the safety of the wearer.

[0056] In this invention application, firstly, by staggering the first and second inserts, sharp objects can be prevented from directly penetrating the weak points of the multi-layer flexible knitted stab-resistant fabric in a single direction. When the first and second inserts are staggered, the protective forces from different directions complement each other, forming a more robust stab-resistant barrier and enhancing the overall puncture resistance. Especially when encountering attacks from multiple angles and directions, this staggered arrangement can better disperse the piercing force, reducing the possibility of piercing the multi-layer flexible knitted stab-resistant fabric. In addition, the spaced distribution design of the first and second inserts allows the stab-resistant fabric to maintain high flexibility and comfort. Through the reasonable spacing of the hard blocks, the weight of the stab-resistant structure can be reduced, avoiding the use of excessive hard blocks and reducing the discomfort and burden caused by hard blocks to the wearer, thereby improving the wearer's wearing experience. Furthermore, the staggered and spaced structural design not only allows the multi-layer flexible knitted stab-resistant fabric to provide more reliable protection in high-risk environments such as police, riot control, and security personnel, but also meets the needs of fencers and other high-risk industries in special occasions where protection is ensured while avoiding restriction of movement flexibility.

[0057] Optionally, the stab-resistant outer layer A, the first stab-resistant intermediate layer C, and the second stab-resistant intermediate layer E are made of polyethylene; the weft-insertion buffer layer F is made of at least one of polyester bulky yarn and acrylic bulky yarn; and the skin-friendly inner layer G is made of at least one of wool, cotton, and blended yarn.

[0058] In some embodiments, the materials of the stab-resistant outer layer A, the first stab-resistant intermediate layer C, and the second stab-resistant intermediate layer E include polyethylene (PE), such as ultra-high molecular weight polyethylene (UHMWPE). Polyethylene (PE) has excellent tensile strength and abrasion resistance, weakening the impact force of stabs and effectively enhancing the puncture resistance of the stab-resistant outer layer A, the first stab-resistant intermediate layer C, and the second stab-resistant intermediate layer E. Polyethylene fibers are not only tough and durable but also relatively lightweight, helping to reduce the overall weight of the fabric and improve the wearer's comfort and freedom of movement.

[0059] In some embodiments, polyester bulky yarn and acrylic bulky yarn are used as raw materials for the weft cushioning layer F, which have good elasticity, strength and heat resistance; polyester bulky yarn and acrylic bulky yarn can effectively relieve external impact, play a shock absorption and cushioning role, enhance the comfort of the fabric, and at the same time have high abrasion resistance and extend the service life of the fabric.

[0060] In some embodiments, wool possesses excellent breathability and softness, effectively regulating temperature and providing a comfortable wearing experience. Cotton fibers are skin-friendly, soft, and comfortable, suitable for prolonged skin contact. Blended yarns combine the advantages of wool and cotton, enhancing the comfort of the fabric. Both wool and cotton fibers have strong moisture absorption, keeping skin dry and reducing discomfort caused by sweat buildup during wear. The natural antibacterial properties of wool and cotton fibers help reduce skin allergies and discomfort, making them especially suitable for people with sensitive skin. Wool and cotton fibers are natural fibers with strong biodegradability, making them environmentally friendly and in line with sustainable development principles. Blended yarns enhance the overall performance of the fibers by combining the advantages of different materials. Using at least one of wool, cotton, or blended yarn as the raw material for the skin-friendly inner layer G can improve comfort, moisture absorption and breathability, and also possess anti-allergenic and environmentally friendly properties.

[0061] In this invention application, the multi-layer flexible knitted stab-resistant fabric, by rationally selecting polyethylene, polyester bulk yarn, acrylic bulk yarn, and wool, cotton, and blended yarn raw materials, can not only improve stab resistance and comfort, but also enhance the durability and applicability of the fabric. It can meet the high-strength protection requirements while ensuring the wearer's comfort and freedom of movement, achieving a balance in terms of comfort, breathability, and durability.

[0062] Description of the preparation method of multi-layer flexible knitted stab-resistant fabric

[0063] like Figure 4a , Figure 4b and Figure 4c As shown, in a second aspect, a method for preparing a multi-layer flexible knitted stab-resistant fabric, comprising preparing any of the multi-layer flexible knitted stab-resistant fabrics described in the first aspect, including:

[0064] It should be noted that, in Figure 4a , Figure 4b and Figure 4c In the text, solid lines represent new loops in the knitting row, and dashed lines represent old loops on the knitting needle. The method for preparing a multi-layer flexible knitted stab-resistant fabric according to this invention application prepares a multi-layer flexible knitted stab-resistant fabric as described in any of the first aspects above, which correspondingly includes all the technical problems, technical solutions, and technical effects recorded in any of the multi-layer flexible knitted stab-resistant fabrics in the first aspect. This invention application will not repeat these details here.

[0065] Step S100: Weave the puncture-resistant outer layer A and the first puncture-resistant intermediate layer C;

[0066] Specifically, step S100 includes:

[0067] Step S101: Use the odd-numbered needles of the back down needle bed of the four-needle bed to knit the puncture-proof outer layer A. The material of the puncture-proof outer layer A is polyethylene. The yarn loop length of the four-needle bed is set to 6.5. When knitting the odd-numbered needles of the back down needle bed, the loops of the even-numbered needles of the back down needle bed are temporarily transferred to the front up needle bed to avoid the loops of the puncture-proof outer layer A and the loops of the first puncture-proof intermediate layer C from sticking together.

[0068] In some embodiments, such as Figure 4a As shown in (a), this is a loop distribution diagram after one cycle of knitting is completed. The odd-numbered stitches corresponding to the next stitch on the needle bed are shown in the diagram. Figure 4a The solid loop portion in (b) is knitted using odd-numbered needles on the back knitting bed. The puncture-resistant surface layer A can be made of 800D ultra-high molecular weight polyethylene yarn. The machine model is Shima Seiki four-needle bed MACH2XS153, size 12. The yarn loop length on the machine is set to 6.5. When knitting with odd-numbered needles on the back knitting bed, the loops of even-numbered needles on the back knitting bed are temporarily transferred to the front upper needle bed. This prevents the loops of the puncture-resistant surface layer A and the loops of the first puncture-resistant intermediate layer C from sticking together. Figure 4a The arrow in (b) indicates the section where the stitch is turned;

[0069] Step S102: Knit the first puncture-resistant intermediate layer C using the even number of needles on the back knitting bed of a four-needle bed. The material of the first puncture-resistant intermediate layer C is polyethylene, and the loop length of the yarn on the four-needle bed is set to 6.5.

[0070] In some embodiments, such as Figure 4b The solid line loop section in (c) shows the even-numbered needle loop corresponding to the back needle bed. The first anti-puncture intermediate layer C is knitted using the even-numbered needles of the back needle bed. 800D ultra-high molecular weight polyethylene yarn can be used, and the yarn loop length on the machine is set to 6.5.

[0071] Step S200: The stab-resistant outer layer A and the first stab-resistant intermediate layer C are connected to form the first insert receiving portion B;

[0072] Specifically, step S200 includes: knitting such that the anti-puncture surface layer A and the first anti-puncture intermediate layer C are connected to form a first connecting part H, the loops on the 2i-th and 2j-th needles of the rear needle bed from left to right are not transferred, j is greater than i, and i and j are both positive integers, correspondingly, the first connecting loop of the first connecting part includes the loops on the 2i-th and 2j-th needles of the front needle bed that are not transferred, the anti-puncture surface layer A and the first anti-puncture intermediate layer C are connected together through the first connecting loop of the first connecting part H to form a first insert receiving part B; the first insert receiving part B includes a plurality of first receiving parts separated between the anti-puncture surface layer A and the first anti-puncture intermediate layer C by the first connecting loop, and the first receiving part is a cavity area;

[0073] In some embodiments, such as Figure 5As shown, the knitting process connects the puncture-resistant outer layer A and the first puncture-resistant intermediate layer C to form a first connecting portion H. The loops on the second and eighth needles of the rear needle bed from left to right are not transferred. The first connecting loop of the first connecting portion includes the loops that are not transferred to the second and eighth needles of the front needle bed. The puncture-resistant outer layer A and the first puncture-resistant intermediate layer C are connected together through the first connecting loop of the first connecting portion H to form a first insert receiving portion B.

[0074] Step S300: Weave the second stab-resistant intermediate layer E;

[0075] Specifically, step S300 includes: knitting a second puncture-resistant intermediate layer E using odd-numbered needles on the lower needle bed of a four-needle bed, wherein the material of the second puncture-resistant intermediate layer E is polyethylene, and the loop length of the yarn on the four-needle bed is set to 6.5.

[0076] In some embodiments, such as Figure 4b As shown in (d), the second puncture-resistant intermediate layer E is knitted using odd-numbered needles on the lower needle bed of a four-needle bed, using 800D ultra-high molecular weight polyethylene yarn, with the yarn loop length set to 6.5 on the machine.

[0077] Step S400: The first puncture-resistant intermediate layer C and the second puncture-resistant intermediate layer E are connected to form the second insert receiving portion D;

[0078] Specifically, step S400 includes:

[0079] The knitting process connects the first anti-puncture intermediate layer C and the second anti-puncture intermediate layer E to form the second connecting part I. For the loops on the 2m and 2n needles of the back needle bed from left to right, n is greater than m, and n and m are both positive integers. The second connecting loop of the second connecting part is formed by knitting the front odd number needle loops at the same time as knitting the 2m and 2n needles of the back needle bed. The first anti-puncture intermediate layer and the second anti-puncture intermediate layer are connected together through the second connecting loop of the second connecting part I to form the second insert receiving part D. The second insert receiving part D is a plurality of second receiving parts separated between the first and second anti-puncture intermediate layers by the second connecting loop. The second receiving part is a cavity area.

[0080] In some embodiments, the first stab-resistant intermediate layer C and the second stab-resistant intermediate layer E are woven together to form the second connecting portion I, such as... Figure 6 As shown, for the loops on the 2nd and 8th needles of the back needle bed, the second connecting loop of the second connecting part I is woven into a loop on the 2nd and 8th needles of the back needle bed while the front odd number needle loop is being woven. The first anti-puncture intermediate layer C and the second anti-puncture intermediate layer E are connected together through the second connecting loop of the second connecting part I to form the second insert receiving part D.

[0081] Optionally, ji = p, nm = q, the numerical range of p is 2 ≤ p ≤ 6, and the numerical range of q is 2 ≤ q ≤ 6.

[0082] In some embodiments, p can be 2, 3, 4, 5, or 6, and q can be 2, 3, 4, 5, or 6. This ensures that the connection density of the first connecting line is neither too loose nor too tight, and also ensures that the connection density of the second connecting line is neither too loose nor too tight.

[0083] Step S500: Weave the weft-inserting buffer layer F and the skin-friendly inner layer G. The second puncture-proof intermediate layer E is provided between the weft-inserting buffer layer F and the skin-friendly inner layer G. The second puncture-proof intermediate layer E is connected to the skin-friendly inner layer G.

[0084] Specifically, step S500 includes:

[0085] Step S501: Use the even-numbered needles of the front lower needle bed of the four-needle bed to knit the skin-friendly inner layer G. The material of the skin-friendly inner layer G is one of wool, cotton, or blended yarn. During knitting, the odd-numbered loops need to be temporarily transferred to the back upper needle bed.

[0086] In some embodiments, in step S501, the skin-friendly inner layer G is knitted using even-numbered needles on the front lower needle bed, employing 48NM / 2 wool yarn, with two yarn feeds and a machine loop length set to 6.2. During knitting, odd-numbered loops need to be temporarily transferred to the rear upper needle bed, such as... Figure 4c As shown in (e);

[0087] In step S502, the weft-inserting buffer layer F is a floating yarn structure in the cavity area between the skin-friendly inner layer G and the second anti-puncture intermediate layer E. The raw material of the weft-inserting buffer layer F is one of polyester bulky yarn, acrylic bulky yarn, etc. During the weaving, the odd-numbered loops that were temporarily transferred to the upper needle bed in step S501 are turned back to the lower needle bed to press down the long floating yarn and ensure the padding angle of the floating yarn structure.

[0088] In some embodiments, in step S502, the weft buffer layer F is made of 1200D polyester bulky yarn. To ensure the padding angle of the float structure, during knitting, the odd-numbered loops temporarily transferred to the upper back needle bed in step S501 are flipped back to the lower back needle bed to hold down the long floats, thus ensuring the padding angle of the float structure. Figure 4c As shown in (f);

[0089] Step S503: While knitting in step S501, the front odd-numbered needles are knitted in a tucked loop pattern according to a preset knitting pattern, so that the skin-friendly inner layer G and the second puncture-proof intermediate layer E are connected according to the preset knitting pattern to form the third connecting part J. The third connecting part J includes a polygonal connecting area (such as...). Figure 1As shown), the polygon can be a quadrilateral or a hexagon, etc. The third connecting part J can fix the weft yarn in step S502 to prevent it from sliding arbitrarily in the cavity area and affecting the flatness of the fabric.

[0090] In some embodiments, in step S503, while knitting in step S501, the front odd-numbered needles are knitted in a tucked loop pattern according to a preset knitting rule, so that the skin-friendly inner layer G and the second puncture-resistant intermediate layer E are connected according to the preset knitting rule to form a third connecting part J. The third connecting part J includes a diamond-shaped connecting area, such as... Figure 1 , Figure 2 and Figure 7 As shown, the third connecting part J includes multiple diamond-shaped connecting areas and traces of the third connecting coil in the diamond-shaped areas. The third connecting part J can fix the weft yarn in step S502, preventing it from sliding arbitrarily in the cavity area, thereby ensuring the flatness of the multi-layer flexible knitted anti-stab fabric.

[0091] The accompanying drawings are merely one embodiment of this invention, and the actual structure is not limited to this. In conclusion, if those skilled in the art, inspired by these drawings, design similar structures and embodiments without departing from the spirit of this invention, such designs should fall within the scope of protection of this invention.

Claims

1. A method for preparing a multi-layer flexible knitted stab-resistant fabric, characterized in that, include: Step S100: Knitting the puncture-resistant outer layer and the first puncture-resistant intermediate layer: Knitting the puncture-resistant outer layer and the first puncture-resistant intermediate layer using the odd-numbered needles of the back knitting bed of a four-needle bed. When knitting with the odd-numbered needles, the loops of the even-numbered needles of the back knitting bed are temporarily transferred to the front upper needle bed. Step S200: The puncture-resistant outer layer and the first puncture-resistant intermediate layer are connected to form the first insert receiving portion; Step S300: Weave the second puncture-resistant intermediate layer; Step S400: The first puncture-resistant intermediate layer and the second puncture-resistant intermediate layer are connected to form the second insert receiving portion; Step S500: Weave a weft-inserted buffer layer and a skin-friendly inner layer. A weft-inserted buffer layer is provided between the second puncture-resistant intermediate layer and the skin-friendly inner layer. The second puncture-resistant intermediate layer is connected to the skin-friendly inner layer. Step S200 includes: knitting such that the anti-puncture surface layer and the first anti-puncture intermediate layer are connected to form a first connecting part, the loops on the 2i-th needle and the 2j-th needle from left to right on the back needle bed are not transferred, j is greater than i, i and j are both positive integers, correspondingly, the first connecting loop of the first connecting part includes the loops on the 2i-th needle and the 2j-th needle that are not transferred to the front needle bed, the anti-puncture surface layer and the first anti-puncture intermediate layer are connected together through the first connecting loop of the first connecting part to form a first insert receiving part; Step S400 includes: knitting such that the first anti-puncture intermediate layer and the second anti-puncture intermediate layer are connected to form a second connecting part, and loops on the 2m and 2n needles of the back needle bed from left to right, where n is greater than m and n and m are both positive integers. The second connecting loop of the second connecting part is formed by knitting the front odd number needle loops into loops on the 2m and 2n needles of the back needle bed. The first anti-puncture intermediate layer and the second anti-puncture intermediate layer are connected together through the second connecting loop of the second connecting part to form a second insert receiving part. Step S500 includes steps S501, S502, and S503; Step S501: Use the even-numbered needles of the front knit bed of the four-needle bed to knit the skin-friendly inner layer. During knitting, the odd-numbered loops need to be temporarily transferred to the back upper needle bed. Step S502, weft buffer layer knitting: while knitting, the odd-numbered loops that were temporarily transferred to the upper back needle bed in step S501 are turned back to the lower back needle bed to hold down the long floats and ensure the padding angle of the float structure. In step S503, while knitting in step S501, the front odd-numbered needles are knitted in a loop according to a preset knitting pattern, so that the skin-friendly inner layer and the second puncture-proof intermediate layer are connected according to the preset knitting pattern to form a third connecting part, the third connecting part including a polygonal connecting area.

2. The method for preparing a multi-layer flexible knitted stab-resistant fabric according to claim 1, characterized in that, Step S100 includes: Step S101: Use the odd-numbered needles of the back knitting bed of the four-needle bed to knit the puncture-resistant outer layer. The raw material of the puncture-resistant outer layer is polyethylene yarn. The yarn loop length of the four-needle bed is set to 6.

5. When knitting the odd-numbered needles of the back knitting bed, the loops of the even-numbered needles of the back knitting bed are temporarily transferred to the front upper needle bed. Step S102: Knit the first puncture-resistant intermediate layer using the even number of needles on the back knitting bed of a four-needle bed. The raw material for the first puncture-resistant intermediate layer is polyethylene yarn, and the loop length of the yarn on the four-needle bed is set to 6.

5.

3. The method for preparing a multi-layer flexible knitted stab-resistant fabric according to claim 2, characterized in that, In step S200, the first insert receiving portion includes a plurality of first receiving portions separated between the anti-puncture surface layer and the first anti-puncture intermediate layer by a first connecting coil, and the first receiving portion is a cavity region.

4. The method for preparing a multi-layer flexible knitted stab-resistant fabric according to claim 3, characterized in that, In step S400, the second insert receiving portion is a plurality of second receiving portions separated between the first anti-puncture intermediate layer and the second anti-puncture intermediate layer by the second connecting coil; the second receiving portion is a cavity region.

5. The method for preparing a multi-layer flexible knitted stab-resistant fabric according to claim 1, characterized in that, In step S501, the raw material for the skin-friendly inner layer is at least one of wool, cotton, and blended yarn, with two yarn feeds and a yarn loop length of 6.2 on the four-needle bed. In step S502, the weft-lined buffer layer is a floating yarn structure in the cavity area between the skin-friendly inner layer and the second puncture-resistant intermediate layer, and the raw material of the weft-lined buffer layer is at least one of polyester bulky yarn and acrylic bulky yarn.

6. The method for preparing a multi-layer flexible knitted stab-resistant fabric according to claim 5, characterized in that, ji = p, nm = q, the numerical range of p is 2 ≤ p ≤ 6, and the numerical range of q is 2 ≤ q ≤ 6.

7. The multilayer flexible knitted stab-resistant fabric prepared by the method according to any one of claims 1-6, characterized in that, include: The device comprises a stab-resistant outer layer, a first insert receiving portion, a first stab-resistant intermediate layer, a second insert receiving portion, a second stab-resistant intermediate layer, a weft-insertion buffer layer, and a skin-friendly inner layer. The stab-resistant outer layer is connected to the first stab-resistant intermediate layer and forms the first insert receiving portion. The first stab-resistant intermediate layer is connected to the second stab-resistant intermediate layer and forms the second insert receiving portion. The second stab-resistant intermediate layer is connected to the skin-friendly inner layer. A weft-insertion buffer layer is provided between the second stab-resistant intermediate layer and the skin-friendly inner layer. The first insert receiving portion includes multiple first receiving portions, each capable of accommodating a first insert. The second insert receiving portion includes multiple second receiving portions, each capable of accommodating a second insert. Both the first and second inserts include a hard block, the material of which includes at least one of ceramic, resin, metal, and alloy.

8. The multi-layer flexible knitted stab-resistant fabric according to claim 7, characterized in that, Along the first direction, multiple first inserts are spaced apart, multiple second inserts are spaced apart, and the first inserts and second inserts are staggered.

9. A multi-layer flexible knitted stab-resistant fabric according to claim 8, characterized in that, The stab-resistant outer layer is connected to the first stab-resistant intermediate layer to form a first connecting portion, the first connecting portion including a plurality of first connecting coils; the first stab-resistant intermediate layer is connected to the second stab-resistant intermediate layer to form a second connecting portion, the second connecting portion including a plurality of second connecting coils; the skin-friendly inner layer is connected to the second stab-resistant intermediate layer to form a third connecting portion, the third connecting portion including a plurality of third connecting coils.

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