Multi-layer flexible knitted stab-resistant fabric and preparation method thereof

Abstract

The invention relates to a multi-layer flexible knitted stab-resistant fabric and a preparation method thereof, and belongs to the technical field of protective textile materials. The preparation method of the multi-layer flexible knitted stab-resistant fabric comprises the following steps: S100, weaving the stab-resistant surface layer and the first stab-resistant middle layer; s200, the puncture-proof surface layer and the first puncture-proof middle layer are connected to form a first insertion piece containing part; step S300, weaving a second puncture-proof middle layer; s400, the first puncture-proof middle layer and the second puncture-proof middle layer are connected to form a second insertion piece containing part; and S500, weaving the weft insertion buffer layer and the skin-friendly inner layer, arranging the weft insertion buffer layer between the second stab-resistant middle layer and the skin-friendly inner layer, and connecting the second stab-resistant middle layer with the skin-friendly inner layer. The multi-layer flexible knitted stab-resistant fabric has a stab-resistant function, does not need to be bonded, is simple in production process, high in efficiency and environmentally friendly, and has wide market prospects and application value.

Description

Technical Field

[0001] The present invention belongs to the technical field of structural bionic textile materials, and specifically relates to a multi-layer flexible knitted stab-proof fabric and a preparation method thereof. Background Art

[0002] The application scenarios of stab-proof clothing are gradually increasing. For example, police officers, riot control personnel, security personnel, fencing athletes, high-risk industries, etc. all need professional protective equipment to ensure their own safety. Therefore, stab-proof clothing has become a hot research object at present. Existing methods for preparing stab-proof clothing generally include: a method for coating and impregnating fabrics with resins, or a method for adhering and combining fabrics with hard materials (such as hard blocks or particles such as ceramics, resins, and metal alloys), or a method for bonding fabrics with stab-proof sheets, or a method for bonding multi-layer fabrics, etc. Although these methods guarantee the basic performance of stab-proof clothing to a certain extent, with the continuous expansion of application scenarios and the further improvement of protection requirements, the deficiencies of existing stab-proof clothing and its preparation methods in terms of flexibility, durability, and lightweight have gradually become prominent.

[0003] In the resin coating and impregnation method, resin coating or impregnation can increase the hardness and stab resistance of the fabric, but due to the rigidity of the resin itself, the clothing often lacks sufficient softness and comfort; in the hard material attachment and bonding method, by attaching hard materials such as hard blocks or particles such as ceramics, resins, metal alloys, etc. to the surface of the fabric, although the stab resistance effect can be effectively improved, these hard materials may increase the weight of the stab-proof clothing, affecting the comfort and flexibility of wearing, and often require additional layers, resulting in a bulky clothing;

[0004] In the method of bonding fabric and stab-proof sheet, adhesive is used to bond the stab-proof sheet to the fabric, which can achieve good stab-proof effect. However, the durability of adhesive is poor, and the stab-proof performance may decrease over time. Moreover, during long-term use, the bonding part may be worn or fall off. For example, patent CN114407446A discloses a fabric with wear-resistant and stab-proof structure: three layers of stab-proof fabric are sprayed with glue and pressed together. The prepared fabric with wear-resistant and stab-proof structure is breathable and thin, but the preparation process of the fabric with wear-resistant and stab-proof structure is complicated, and the durability and environmental protection of glue are poor; patent CN114434936A discloses a puncture-proof material and puncture-proof fabric structure: the base fabric is bonded with the stab-proof strip and the hollow fiber tube. Although the hollow structure can reduce weight, it will increase the thickness of the fabric, affecting the wearing flexibility of the puncture-proof fabric, and the bonding operation also has the problem of poor durability;

[0005] In the multi-layer fabric bonding method, multiple layers of fabric are bonded into a composite structure, which increases the number of protective layers of the stab-proof clothing and can theoretically provide stronger stab-proof capabilities. However, the multi-layer structure will increase the thickness of the fabric, reduce the breathability and comfort of the clothing, and affect the wearing experience. For example, patent CN112432556A discloses an overlapping stab-proof fabric and its preparation method: the base fabric is bonded to the first protective sheet and the second protective sheet, and the first anti-slip sheet and the second protective sheet overlap to avoid stab-proof dead angles. When the knife pierces, the overlapping stab-proof fabric can block the direct damage of the knife tip, but the impact of the stab-proof sheet on the human body is still large, the wearing comfort is poor, and the poor durability caused by bonding cannot be avoided.

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

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

[0008] In a first aspect, a multi-layer flexible knitted stab-proof fabric comprises: a stab-proof surface layer, a first insert accommodating portion, a first stab-proof middle layer, a second insert accommodating portion, a second stab-proof middle layer, a weft lining buffer layer, and a skin-friendly inner layer, wherein the stab-proof surface layer is connected to the first stab-proof middle layer and forms a first insert accommodating portion; the first stab-proof middle layer is connected to the second stab-proof middle layer and forms a second insert accommodating portion; the second stab-proof middle layer is connected to the skin-friendly inner layer, and a weft lining buffer layer is provided between the second stab-proof middle layer and the skin-friendly inner layer; the first insert accommodating portion comprises a plurality of first accommodating portions, each of which can accommodate a first insert; the second insert accommodating portion comprises a plurality of second accommodating portions, each of which can accommodate a second insert; the first insert and the second insert both comprise hard blocks, and the material of the hard blocks comprises at least one of ceramic, resin, metal, and alloy.

[0009] Optionally, along the first direction, a plurality of first plug-ins are distributed at intervals, a plurality of second plug-ins are distributed at intervals, and the first plug-ins and the second plug-ins are arranged in a staggered manner.

[0010] Optionally, the stab-resistant surface layer is connected to the first stab-resistant middle layer to form a first connection part, which includes a plurality of first connection coils; the first stab-resistant middle layer is connected to the second stab-resistant middle layer to form a second connection part, which includes a plurality of second connection coils; the skin-friendly inner layer is connected to the second stab-resistant middle layer to form a third connection part, which includes a plurality of third connection coils.

[0011] In a second aspect, a method for preparing a multi-layer flexible knitted stab-proof fabric is provided, wherein the method comprises:

[0012] Step S100: weaving a stab-proof surface layer and a first stab-proof middle layer;

[0013] Step S200: connecting the stab-resistant surface layer and the first stab-resistant middle layer to form a first insert receiving portion;

[0014] Step S300: weaving a second stab-proof intermediate layer;

[0015] Step S400: the first stab-resistant middle layer and the second stab-resistant middle layer are connected to form a second insert receiving portion;

[0016] Step S500: weaving a weft-inserted buffer layer and a skin-friendly inner layer, wherein a weft-inserted buffer layer is arranged between the second stab-proof middle layer and the skin-friendly inner layer, and the second stab-proof middle layer is connected to the skin-friendly inner layer.

[0017] Optionally, step S100 includes:

[0018] Step S101: using the odd-numbered needles of the rear lower needle bed of the four-needle bed to knit the stab-proof surface layer, the material of the stab-proof surface layer is polyethylene yarn, the yarn loop length of the four-needle bed is set to 6.5, and when knitting the odd-numbered needles of the rear lower needle bed, the coils of the even-numbered needles of the rear lower needle bed are temporarily transferred to the front upper needle bed;

[0019] Step S102: using the even-numbered needles of the rear lower needle bed of the four-needle bed to knit a first stab-proof middle layer, the raw material of the first stab-proof middle layer is polyethylene yarn, and the yarn loop length on the four-needle bed is set to 6.5.

[0020] Optionally, step S200 includes: weaving so that the stab-proof surface layer and the first stab-proof middle layer are connected to form a first connecting part, the coils on the 2i-th knitting needle and the 2j-th knitting needle of the rear lower needle bed from left to right are not transferred, j is greater than i, and i and j are both positive integers, and accordingly, the first connecting coil of the first connecting part includes the coils on the 2i-th knitting needle and the 2j-th knitting needle that are not transferred to the front upper needle bed, the stab-proof surface layer and the first stab-proof middle layer are connected together through the first connecting coil of the first connecting part to form a first insert sheet accommodating part; the first insert sheet accommodating part includes a plurality of first accommodating parts between the stab-proof surface layer and the first stab-proof middle layer, which are divided by the first connecting coil, and the first accommodating part is a cavity area.

[0021] Optionally, step S400 includes: weaving so that the first stab-proof intermediate layer and the second stab-proof intermediate layer are connected to form a second connecting part, the coils on the 2mth knitting needle and the 2nth knitting needle of the lower rear needle bed from left to right, n is greater than m, n, and m are all positive integers, and the second connecting coil of the second connecting part is formed by weaving the front lower odd needle coil on the 2mth knitting needle and the 2nth knitting needle of the lower rear needle bed at the same time, the first stab-proof intermediate layer and the second stab-proof intermediate layer are connected together through the second connecting coil of the second connecting part to form a second insert sheet accommodating part; the second insert sheet accommodating part is a plurality of second accommodating parts separated by the second connecting coil between the first stab-proof intermediate layer and the second stab-proof intermediate layer, and the second accommodating part is a cavity area.

[0022] Optionally, step S500 includes:

[0023] Step S501, using the even-numbered needles of the front lower needle bed of the four-needle bed to knit the skin-friendly inner layer, the raw material of the skin-friendly inner layer is at least one of wool, cotton, and blended yarn, 2 yarns are fed, and the yarn loop length on the four-needle bed is set to 6.2. When knitting, the odd-numbered loops need to be temporarily transferred to the rear upper needle bed;

[0024] Step S502, the weft inlay buffer layer is a floating thread structure in the cavity area between the skin-friendly inner layer and the second stab-proof middle layer. The raw material of the weft inlay buffer layer is at least one of polyester bulked yarn and acrylic bulked yarn. While weaving, the odd-numbered loops temporarily transferred to the rear upper needle bed in step S501 are turned back to the rear lower needle bed to press down the long floating thread to ensure the inlay yarn angle of the floating thread structure;

[0025] Step S503, while knitting in step S501, the front lower odd-numbered needles are tucked according to a preset knitting rule, so that the skin-friendly inner layer and the second stab-proof middle layer are connected according to the preset knitting rule to form a third connection part, and the third connection part includes a polygonal connection 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 the present invention are as follows:

[0028] (1) In the present invention, by embedding hard blocks (such as ceramics, resins, metals or alloys) into the first receiving part of the first insert receiving part B and the second receiving part of the second insert receiving part D, the stab-proof performance of the fabric is effectively enhanced. These hard blocks can effectively disperse the piercing force and prevent the penetration of knives or sharp objects, which not only provides excellent stab-proof protection, but also ensures the stability and durability of the fabric in long-term use by combining materials with high durability (such as ceramics, metals, alloys, etc.), so that the multi-layer flexible knitted stab-proof fabric can withstand multiple uses and external force impacts and maintain long-term protective performance; at the same time, the multi-layer flexible knitted stab-proof fabric uses an innovative structural design, does not require bonding, has a simple production process, is highly efficient and environmentally friendly, and achieves multi-level flexibility, buffering and protection. It can not only be used in high-risk industries such as police, security, fencing, etc., but can also be widely used in other scenes that require protection, such as outdoor sports, construction sites, etc., providing all-round protection, meeting the diverse needs of different fields for stab-proof clothing, and has broad market prospects and application value.

[0029] (2) In the present invention, by staggering the first insert and the second insert, it is possible to prevent sharp objects from directly penetrating the weak link 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 solid stab-proof barrier and enhancing the overall anti-puncture capability. At the same time, the spacing distribution design of the first insert and the second insert can enable the stab-proof fabric to maintain a high degree of flexibility and comfort. By reasonably arranging the hard blocks at intervals, the weight of the stab-proof structure can be reduced, the excessive use of hard blocks can be avoided, and the discomfort and burden caused by the hard blocks to the wearer can be reduced, thereby improving the wearer's wearing experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 Schematic diagram of the three-dimensional decomposition structure of a multi-layer flexible knitted stab-proof fabric applied for by the present invention Figure 1 .

[0032] Figure 2 Schematic diagram of the three-dimensional decomposition structure of a multi-layer flexible knitted stab-proof fabric applied for by the present invention Figure 2 .

[0033] Figure 3 Schematic diagram of the three-dimensional decomposition structure of a multi-layer flexible knitted stab-proof fabric applied for by the present invention Figure 3 .

[0034] Figure 4a A schematic diagram of the process of preparing a multi-layer flexible knitted stab-proof fabric according to the present invention Figure 1 .

[0035] Figure 4b A schematic diagram of the process of preparing a multi-layer flexible knitted stab-proof fabric according to the present invention Figure 2 .

[0036] Figure 4c A schematic diagram of the process of preparing a multi-layer flexible knitted stab-proof fabric according to the present invention Figure 3 .

[0037] Figure 5 This is a schematic diagram of the connection between the stab-resistant surface layer and the first stab-resistant middle layer of the present invention.

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

[0039] Figure 7 This is a schematic diagram of the connection of the weft-inserted buffer layer between the second stab-proof middle layer and the skin-friendly inner layer of the present invention.

[0040] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. "Including" can at least be understood as meaning only including. The sequence number of the steps (such as step S100, step S200, step S501, step S502, step S503, etc.) does not mean that it indicates or implies that the steps referred to must be operated in a strict and specific order, and the order can be understood appropriately in combination with the specific content. In order to make the purpose, technical solution and advantages of the present invention clearer, the implementation mode of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0043] Multi-layer flexible knitted stab-proof fabric description

[0044] like Figures 1 to 3 As shown, in the first aspect, a multi-layer flexible knitted stab-proof fabric comprises a stab-proof surface layer A, a first insert accommodating portion B, a first stab-proof middle layer C, a second insert accommodating portion D, a second stab-proof middle layer E, a weft-inserted buffer layer F, and a skin-friendly inner layer G, the stab-proof surface layer A is connected to the first stab-proof middle layer C, and a first insert accommodating portion B is formed; the first stab-proof middle layer C is connected to the second stab-proof middle layer E, and a second insert accommodating portion B is formed; a weft-inserted buffer layer F is provided between the second stab-proof middle layer E and the skin-friendly inner layer G, the second stab-proof middle layer E is connected to the skin-friendly inner layer G, the first insert accommodating portion B comprises a plurality of first accommodating portions, each of which can accommodate a first insert, the second insert accommodating portion D comprises a plurality of second accommodating portions, each of which can accommodate a second insert, and the first insert and the second insert both comprise a hard block, and the material of the hard block comprises at least one of ceramic, resin, metal, and alloy.

[0045] In some embodiments, in the first insert, the material of the hard block is at least one of ceramic, resin, metal, and alloy. For example, the hard block of the first insert is made of ceramic material. Ceramics have high hardness and penetration resistance, and can effectively prevent puncture from sharp objects. They are particularly suitable for high-strength puncture protection, such as uniforms of police officers or security personnel. In this case, the first receiving portion of the first insert receiving portion B will tightly wrap the ceramic hard block and ensure that the hardness of the ceramic can fully play a role, providing stable protection.

[0046] In some embodiments, in the second insert, the material of the hard block is at least one of ceramic, resin, metal, and alloy. For example, the hard block of the second insert can be made of metal alloy (such as titanium alloy or stainless steel). While ensuring high-strength protection, the metal alloy also has good durability and lightness, and can be used in scenes such as fencing athletes who need frequent exercise and have high weight requirements. 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 movement flexibility.

[0047] In some embodiments, the first stab-resistant middle layer C and the second stab-resistant middle layer E can be composed of multiple layers of composite materials, such as high-strength aramid fiber or polyester fiber or polyethylene, etc. These materials can provide additional cut resistance and do not increase excessive weight and thickness while providing stab resistance, thereby ensuring the softness and wearing comfort of the fabric.

[0048] In some embodiments, the weft insert buffer layer F uses foam material, silicone material or fluffy material, which can effectively absorb external impact, reduce the direct impact of hard blocks on the wearer's body, and offset the impact force of external knives and the like on the human body during puncture, avoid excessive damage to the human body, and increase the comfort of the wearer. The design of the weft insert buffer layer F ensures that the stab-proof fabric is skin-friendly when worn, reducing the discomfort caused by long-term wearing.

[0049] Therefore, in the multi-layer flexible knitted stab-proof fabric applied for by the present invention, firstly, by embedding hard blocks (such as ceramics, resins, metals or alloys) into the first receiving part of the first insert receiving part B and the second receiving part of the second insert receiving part D respectively, the stab-proof performance of the fabric is effectively enhanced, and these hard blocks can effectively disperse the puncture force to prevent the penetration of knives or sharp objects, which not only provides excellent stab-proof protection, but also ensures the stability and durability of the fabric in long-term use by combining materials with high durability (such as ceramics, metals, alloys, etc.), so that the multi-layer flexible knitted stab-proof fabric can withstand multiple uses and external force impacts and maintain long-term protective performance; in addition, the multi-layer flexible knitted stab-proof fabric includes a knitting process, and the knitting process makes the fabric The overall structure is tighter and lighter. Each layer in the multi-layer structure provides flexibility, comfort and breathability of the fabric. The weft lining structure reduces the impact of external force, helps to reduce the wearer's stuffiness and discomfort during wearing or exercise, and improves the comfort of the fabric. In addition, the multi-layer flexible knitted stab-proof fabric uses an innovative structural design, does not require bonding, has a simple production process, high efficiency and environmental protection, and achieves multi-level flexibility, cushioning and protection. It is not only suitable for high-risk industries such as police, security, fencing, etc., but can also be widely used in other scenarios that require protection, such as outdoor sports, construction sites, etc., providing all-round protection and meeting the diverse needs of different fields for stab-proof clothing. It has broad market prospects and application value.

[0050] Optionally, the stab-resistant surface layer A is connected to the first stab-resistant middle layer C to form a first connecting part H, which includes a plurality of first connecting coils; the first stab-resistant middle layer C is connected to the second stab-resistant middle layer E to form a second connecting part I, which includes a plurality of second connecting coils; the skin-friendly inner layer G is connected to the second stab-resistant middle layer E to form a third connecting part J, which includes a plurality of third connecting coils.

[0051] In some embodiments, the stab-resistant surface layer A forms a first connection part H by connecting with the first stab-resistant middle layer C, and the multiple first connection coils of the first connection part reinforce the stability and firmness between the layers. Similarly, the first stab-resistant middle layer C is connected to the second stab-resistant middle layer E to form a second connection part I, and the skin-friendly inner layer G is connected to the second stab-resistant middle layer E to form a third connection part J. The integrity of the overall protective structure is further enhanced by the multiple second connection coils of the second connection part I and the multiple third connection coils of the third connection part J. The effective combination of this multi-layer structure not only improves the stab-resistant performance, but also increases the protective ability of the fabric, enabling it to effectively prevent the penetration of sharp objects in more complex and harsh environments.

[0052] In some embodiments, through the design of multiple connection coils, the use of multiple connection coils increases the bonding force between the layers, so that the fabrics of different layers can be tightly combined to prevent the overall protective effect from being affected by sliding or loosening between the layers, so that the fabrics can maintain their original protective performance for a long time and effectively cope with multiple uses and high-intensity pressure; at the same time, the design of multiple connection coils makes the stab-proof fabrics have a certain degree of flexibility and adaptability while maintaining high-intensity protection. Compared with traditional bonding or overly rigid structures, the design of multiple connection coils makes the fabrics more soft and elastic, can better adapt to the movement needs of the human body, and provide higher comfort, especially during long-term wear, reducing discomfort, and is more environmentally friendly and low-cost, which helps to reduce production costs and improve overall economic benefits.

[0053] In some embodiments, since each layer is fixed by connecting coils, displacement or loosening between fabric layers during long-term use can be effectively prevented, ensuring that the stab-proof function is durable and reliable. Even after frequent stretching, bending or wear, the fabric can still maintain its protective performance, improving the durability of the product. The thickness and flexibility can also be adjusted according to actual needs to meet the protection needs of different working environments, such as police, security, construction sites and other high-risk places. It is also suitable for daily wear and has a wide range of adaptability and market demand.

[0054] Optionally, along the first direction, a plurality of first plug-ins are distributed at intervals, a plurality of second plug-ins are distributed at intervals, and the first plug-ins and the second plug-ins are arranged in a staggered manner.

[0055] In some embodiments, along the first direction, the plurality of first inserts and the plurality of second inserts are distributed at a predetermined interval, and the first inserts and the second inserts are arranged in a staggered manner. The first direction may be the direction in which the plurality of first accommodating portions are arranged or the width direction or length direction of the fabric. When a sharp object (such as a blade, a needle, etc.) contacts the fabric, its penetration 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 plurality of first inserts and the plurality of second inserts, thereby greatly increasing the difficulty of piercing the multi-layer flexible knitted stab-proof fabric, effectively preventing sharp objects from penetrating quickly, and increasing the safety of the wearer.

[0056] In the present invention application, firstly, by staggering the first insert and the second insert, it is possible to prevent sharp objects from directly penetrating the weak link 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 solid stab-proof barrier and enhancing the overall anti-puncture ability. Especially when encountering attacks from multiple angles and different directions, this staggered arrangement can better disperse the piercing force and reduce the possibility of piercing the multi-layer flexible knitted stab-proof fabric; in addition, the interval distribution design of the first insert and the second insert can keep the stab-proof fabric highly flexible and comfortable. Through the reasonable interval arrangement of the hard blocks, the weight of the stab-proof structure can be reduced, the excessive use of hard blocks can be avoided, and the discomfort and burden caused by the hard blocks to the wearer can be reduced, thereby improving the wearer's wearing experience; in addition, the structural design of the staggered and interval distribution can not only make the multi-layer flexible knitted stab-proof fabric provide more reliable protection in high-risk environments such as police, riot control, and security personnel, but also meet the needs of fencing athletes, high-risk industries, etc. in special occasions such as ensuring protective force and avoiding limiting movement flexibility.

[0057] Optionally, the raw materials of the stab-proof surface layer A, the first stab-proof middle layer C, and the second stab-proof middle layer E include polyethylene, the raw materials of the weft-inserted buffer layer F include at least one of polyester bulked yarn and acrylic bulked yarn, and the raw materials of the skin-friendly inner layer G include at least one of wool, cotton, and blended yarn.

[0058] In some embodiments, the material of the stab-resistant surface layer A, the first stab-resistant middle layer C, and the second stab-resistant middle layer E includes polyethylene (PE), such as ultra-high molecular weight polyethylene (UHMWPE). Polyethylene (PE) has excellent tensile strength and abrasion resistance, weakens the stab-resistant impact force, and can effectively enhance the puncture resistance of the stab-resistant surface layer A, the first stab-resistant middle layer C, and the second stab-resistant middle layer E. Polyethylene fiber is not only tough and durable, but also relatively light, which helps to reduce the overall weight of the fabric and improve the comfort and mobility of the wearer.

[0059] In some embodiments, polyester bulked yarn and acrylic bulked yarn are used as raw materials for the weft lining buffer layer F, and have good elasticity, strength and heat resistance; polyester bulked yarn and acrylic bulked yarn can effectively alleviate external impact force, play a shock-absorbing and buffering role, enhance the comfort of the fabric, and at the same time have high wear resistance, thereby extending the service life of the fabric.

[0060] In some embodiments, wool has good air permeability and softness, can effectively regulate temperature, and provide a comfortable wearing experience. Cotton fiber has good skin-friendliness, is soft and comfortable, and is suitable for long-term contact with the skin. Blended yarn combines the advantages of wool and cotton to enhance the comfort of the fabric. Both wool and cotton fibers have strong hygroscopicity, can keep the skin dry, and reduce the discomfort caused by sweat accumulation during wearing. The natural antibacterial properties of wool and cotton fibers help reduce skin allergies and discomfort, and are especially suitable for people with sensitive skin. Wool and cotton fibers are natural fibers with strong biodegradability, are environmentally friendly, and conform to the concept of sustainable development. Blended yarn improves the comprehensive performance of fibers by combining the advantages of different materials. At least one of wool, cotton, and blended yarn is used as the raw material of the skin-friendly inner layer G as the raw material of the skin-friendly inner layer, which can enhance comfort, moisture absorption and breathability, and has anti-allergic and environmentally friendly properties.

[0061] In the present invention application, the multi-layer flexible knitted stab-proof fabric can not only improve the stab-proof performance and comfort, but also enhance the durability and applicability of the fabric by reasonably selecting polyethylene, polyester bulked yarn, acrylic bulked yarn and wool, cotton and blended yarn raw materials. It can meet the high-intensity protection needs while ensuring the wearer's comfort and freedom of movement, and achieve a balance in comfort, breathability and durability.

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

[0063] like Figure 4a , Figure 4b and Figure 4c As shown, in the second aspect, a method for preparing a multi-layer flexible knitted stab-proof fabric is provided, wherein the method comprises:

[0064] It should be noted that in Figure 4a , Figure 4b and Figure 4c In the figure, the solid line represents the new coil of the knitting row, the dotted line represents the old coil on the knitting needle, and the method for preparing a multi-layer flexible knitted stab-proof fabric applied by the present invention is to prepare any one of the multi-layer flexible knitted stab-proof fabrics described in the first aspect, and accordingly also includes: all the recorded technical problems, technical solutions and technical effects of any one of the multi-layer flexible knitted stab-proof fabrics in the first aspect, which will not be repeated in the present invention application.

[0065] Step S100: weaving a stab-proof surface layer A and a first stab-proof middle layer C;

[0066] Specifically, step S100 includes:

[0067] Step S101: using the odd-numbered needles of the rear lower needle bed of the four-needle bed to knit the stab-proof surface layer A, the material of the stab-proof surface layer A is polyethylene, the yarn loop length on the four-needle bed is set to 6.5, and when knitting the odd-numbered needles of the rear lower needle bed, the coils of the even-numbered needles of the rear lower needle bed are temporarily transferred to the front upper needle bed to avoid the coils of the stab-proof surface layer A and the coils of the first stab-proof intermediate layer C from being adhered together;

[0068] In some embodiments, Figure 4a (a) shows the distribution of loops after a cycle of knitting is completed. The odd-numbered loops corresponding to the lower needle bed are shown in Figure 1. Figure 4a The solid line coil part in (b); the odd-numbered needles of the rear lower needle bed are used to knit the stab-proof surface layer A. The stab-proof surface layer A can be made of 800D ultra-high molecular weight polyethylene yarn. The machine model is Shima Seiki four-needle bed MACH2XS153 12 machine gauge. The yarn loop length on the machine is set to 6.5. When the odd-numbered needles of the rear lower needle bed are knitted, the coils of the even-numbered needles of the rear lower needle bed are temporarily transferred to the front upper needle bed, which can avoid the coils of the stab-proof surface layer A and the coils of the first stab-proof middle layer C from being adhered together, such as Figure 4a The arrow in (b) shows the needle turning part;

[0069] Step S102: using the even-numbered needles of the rear lower needle bed of the four-needle bed to knit the first stab-proof middle layer C, the raw material of the first stab-proof middle layer C is polyethylene, and the yarn loop length on the four-needle bed is set to 6.5.

[0070] In some embodiments, Figure 4b The solid line coil part in the middle (c) is the even-numbered needle coil corresponding to the lower rear needle bed. The even-numbered needles of the lower rear needle bed are used to knit the first stab-proof middle layer C. 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 surface layer A and the first stab-resistant middle layer C are connected to form a first insert receiving portion B;

[0072] Specifically, step S200 includes: knitting so that the stab-proof surface layer A and the first stab-proof middle layer C are connected to form a first connecting portion H, the coils on the 2i-th knitting needle and the 2j-th knitting needle of the rear lower needle bed from left to right are not transferred, j is greater than i, and i and j are both positive integers, and accordingly, the first connecting coil of the first connecting portion includes the coils on the 2i-th knitting needle and the 2j-th knitting needle that are not transferred to the front upper needle bed, the stab-proof surface layer A and the first stab-proof middle layer C are connected together through the first connecting coil of the first connecting portion H, and form a first insert sheet accommodating portion B; the first insert sheet accommodating portion B includes a plurality of first accommodating portions separated by the first connecting coils between the stab-proof surface layer A and the first stab-proof middle layer C, and the first accommodating portion is a cavity area;

[0073] In some embodiments, Figure 5As shown, the weaving connects the stab-proof surface layer A and the first stab-proof middle layer C to form a first connecting part H, and the coils on the 2nd knitting needle and the 8th knitting needle of the rear lower needle bed from left to right are not transferred. The first connecting coil of the first connecting part includes the coils that are not transferred to the 2nd knitting needle and the 8th knitting needle of the front upper needle bed. The stab-proof surface layer A and the first stab-proof middle layer C are connected together through the first connecting coil of the first connecting part H to form a first insert accommodating part B.

[0074] Step S300: weaving a second stab-proof middle layer E;

[0075] Specifically, step S300 includes: using odd-numbered needles of the lower needle bed of the four-needle bed to knit the second stab-proof middle layer E, the raw material of the second stab-proof middle layer E is polyethylene, and the yarn loop length on the four-needle bed is set to 6.5.

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

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

[0078] Specifically, step S400 includes:

[0079] The weaving makes the first stab-proof middle layer C and the second stab-proof middle layer E connected to form a second connecting part I, for the coils on the 2mth knitting needle and the 2nth knitting needle on the lower rear needle bed from left to right, n is greater than m, and n and m are both positive integers, and the second connecting coil of the second connecting part is formed by knitting the 2mth knitting needle and the 2nth knitting needle on the lower rear needle bed while the front odd-numbered needle coil is knitted into a loop, the first stab-proof middle layer and the second stab-proof middle layer are connected together through the second connecting coil of the second connecting part I, and form a second insert accommodating part D; the second insert accommodating part D is a plurality of second accommodating parts divided by the second connecting coil between the first stab-proof middle layer and the second stab-proof middle layer, and the second accommodating 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 and connected to form a second connecting portion I, such as Figure 6 As shown, for the loops on the 2nd and 8th knitting needles of the rear lower needle bed, the second connecting loop of the second connecting part I is knitted on the 2nd and 8th knitting needles of the rear lower needle bed while the loops of the front lower odd-numbered needles are knitted, and the first stab-proof middle layer C and the second stab-proof middle layer E are connected together through the second connecting loop of the second connecting part I, and form a second insert accommodating 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 or 3 or 4 or 5 or 6, and q can be 2 or 3 or 4 or 5 or 6, so as to ensure that the connection density of the first connecting part line is not too loose or too tight, and also ensure that the connection density of the second connecting part line is not too loose or too tight.

[0083] Step S500: weaving a weft-inserted buffer layer F and a skin-friendly inner layer G, wherein a weft-inserted buffer layer F is arranged between the second stab-proof middle layer E and the skin-friendly inner layer G, and the second stab-proof middle layer E is connected to the skin-friendly inner layer G.

[0084] Specifically, step S500 includes:

[0085] Step S501, using the even-numbered needles of the front lower needle bed of the four needle beds to knit the skin-friendly inner layer G, the raw material of the skin-friendly inner layer G is one of wool, cotton, blended yarn, etc., and during knitting, the odd-numbered loops need to be temporarily transferred to the rear upper needle bed;

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

[0087] Step S502, the weft inlay buffer layer F is a floating thread structure in the cavity area between the skin-friendly inner layer G and the second stab-proof middle layer E. The raw material of the weft inlay buffer layer F is one of polyester bulked yarn and acrylic bulked yarn. While weaving, the odd-numbered loops temporarily transferred to the rear upper needle bed in step S501 are turned back to the rear lower needle bed to press down the long floating threads, so as to ensure the inlay yarn angle of the floating thread structure;

[0088] In some embodiments, in step S502, the weft insert buffer layer F is made of 1200D polyester bulked yarn. In order to ensure the inlay angle of the floating thread structure, the odd-numbered loops temporarily transferred to the rear upper needle bed in step S501 are turned back to the rear lower needle bed during weaving to press down the long floating thread, so as to ensure the inlay angle of the floating thread structure. Figure 4c As shown in (f);

[0089] Step S503, while knitting in step S501, the front lower odd-numbered needles are tucked according to a preset knitting rule, so that the skin-friendly inner layer G and the second stab-proof middle layer E are connected according to the preset knitting rule to form a third connecting portion J, and the third connecting portion J includes a polygonal connecting area (such as Figure 1As shown), the polygon may be a quadrilateral or a hexagon, etc. The third connecting portion J may fix the weft inlay 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 lower odd-numbered needles are tucked according to a preset knitting rule, so that the skin-friendly inner layer G and the second stab-proof middle layer E are connected according to the preset knitting rule to form a third connecting portion J, and the third connecting portion J includes a diamond-shaped connecting area, such as Figure 1 , Figure 2 and Figure 7 As shown, the third connecting portion J includes a plurality of diamond-shaped connecting areas and traces of the third connecting coils in the diamond-shaped areas. The third connecting portion J can fix the weft inlay yarn in step S502 to prevent it from sliding arbitrarily in the cavity area, thereby ensuring the flatness of the multi-layer flexible knitted stab-proof fabric.

[0091] The drawings are only one of the embodiments of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and design a structure and embodiment similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A multi-layer flexible knitted stab-proof fabric, characterized in that: include: The stab-proof surface layer, the first insert sheet accommodating part, the first stab-proof middle layer, the second insert sheet accommodating part, the second stab-proof middle layer, the weft lining buffer layer, and the skin-friendly inner layer, the stab-proof surface layer is connected to the first stab-proof middle layer, and a first insert sheet accommodating part is formed; the first stab-proof middle layer is connected to the second stab-proof middle layer, and a second insert sheet accommodating part is formed; the second stab-proof middle layer is connected to the skin-friendly inner layer, and a weft lining buffer layer is arranged between the second stab-proof middle layer and the skin-friendly inner layer, the first insert sheet accommodating part includes a plurality of first accommodating parts, each of which can accommodate a first insert sheet, the second insert sheet accommodating part includes a plurality of second accommodating parts, each of which can accommodate a second insert sheet, and the first insert sheet and the second insert sheet both include hard blocks, and the material of the hard blocks includes at least one of ceramic, resin, metal, and alloy.

2. The multi-layer flexible knitted stab-proof fabric according to claim 1, characterized in that: Along the first direction, a plurality of first plug-ins are distributed at intervals, a plurality of second plug-ins are distributed at intervals, and the first plug-ins and the second plug-ins are arranged in a staggered manner.

3. The multi-layer flexible knitted stab-proof fabric according to claim 2, characterized in that: The stab-proof surface layer is connected to the first stab-proof middle layer to form a first connection part, which includes a plurality of first connection coils; the first stab-proof middle layer is connected to the second stab-proof middle layer to form a second connection part, which includes a plurality of second connection coils; the skin-friendly inner layer is connected to the second stab-proof middle layer to form a third connection part, which includes a plurality of third connection coils.

4. A method for preparing a multi-layer flexible knitted stab-proof fabric, comprising preparing a multi-layer flexible knitted stab-proof fabric according to any one of claims 1 to 3, characterized in that: include: Step S100: weaving a stab-proof surface layer and a first stab-proof middle layer; Step S200: connecting the stab-resistant surface layer and the first stab-resistant middle layer to form a first insert receiving portion; Step S300: weaving a second stab-proof intermediate layer; Step S400: the first stab-resistant middle layer and the second stab-resistant middle layer are connected to form a second insert receiving portion; Step S500: weaving a weft-inserted buffer layer and a skin-friendly inner layer, wherein a weft-inserted buffer layer is arranged between the second stab-proof middle layer and the skin-friendly inner layer, and the second stab-proof middle layer is connected to the skin-friendly inner layer.

5. The method for preparing a multi-layer flexible knitted stab-proof fabric according to claim 4, characterized in that: Step S100 includes: Step S101: using the odd-numbered needles of the rear lower needle bed of the four-needle bed to knit the stab-proof surface layer, the material of the stab-proof surface layer is polyethylene yarn, the yarn loop length of the four-needle bed is set to 6.5, and when knitting the odd-numbered needles of the rear lower needle bed, the coils of the even-numbered needles of the rear lower needle bed are temporarily transferred to the front upper needle bed; Step S102: using the even-numbered needles of the rear lower needle bed of the four-needle bed to knit a first stab-proof middle layer, the raw material of the first stab-proof middle layer is polyethylene yarn, and the yarn loop length on the four-needle bed is set to 6.

5.

6. The method for preparing a multi-layer flexible knitted stab-proof fabric according to claim 5, characterized in that: Step S200 includes: weaving so that the stab-proof surface layer and the first stab-proof middle layer are connected to form a first connecting part, the coils on the 2i-th knitting needle and the 2j-th knitting needle of the rear lower needle bed from left to right are not transferred, j is greater than i, and i and j are both positive integers, and accordingly, the first connecting coil of the first connecting part includes the coils on the 2i-th knitting needle and the 2j-th knitting needle that are not transferred to the front upper needle bed, the stab-proof surface layer and the first stab-proof middle layer are connected together through the first connecting coil of the first connecting part, and form a first insert sheet accommodating part; the first insert sheet accommodating part includes a plurality of first accommodating parts between the stab-proof surface layer and the first stab-proof middle layer, which are divided by the first connecting coil, and the first accommodating part is a cavity area.

7. The method for preparing a multi-layer flexible knitted stab-proof fabric according to claim 6, characterized in that: Step S400 includes: weaving so that the first stab-proof intermediate layer and the second stab-proof intermediate layer are connected to form a second connecting part, the coils on the 2mth knitting needle and the 2nth knitting needle of the lower rear needle bed from left to right, n is greater than m, n, m are all positive integers, the second connecting coil of the second connecting part is formed by knitting the front lower odd needle coil on the 2mth knitting needle and the 2nth knitting needle of the lower rear needle bed, the first stab-proof intermediate layer and the second stab-proof intermediate layer are connected together through the second connecting coil of the second connecting part to form a second insert sheet accommodating part; the second insert sheet accommodating part is a plurality of second accommodating parts separated by the second connecting coil between the first stab-proof intermediate layer and the second stab-proof intermediate layer, and the second accommodating part is a cavity area.

8. According to the method for preparing a multi-layer flexible knitted stab-proof fabric according to claim 7, step S500 comprises: Step S501, using the even-numbered needles of the front lower needle bed of the four-needle bed to knit the skin-friendly inner layer, the raw material of the skin-friendly inner layer is at least one of wool, cotton, and blended yarn, 2 yarns are fed, and the yarn loop length on the four-needle bed is set to 6.

2. When knitting, the odd-numbered loops need to be temporarily transferred to the rear upper needle bed; Step S502, the weft inlay buffer layer is a floating thread structure in the cavity area between the skin-friendly inner layer and the second stab-proof middle layer. The raw material of the weft inlay buffer layer is at least one of polyester bulked yarn and acrylic bulked yarn. While weaving, the odd-numbered loops temporarily transferred to the rear upper needle bed in step S501 are turned back to the rear lower needle bed to press down the long floating thread to ensure the inlay yarn angle of the floating thread structure; Step S503, while knitting in step S501, the front lower odd-numbered needles are tucked according to a preset knitting rule, so that the skin-friendly inner layer and the second stab-proof middle layer are connected according to the preset knitting rule to form a third connection part, and the third connection part includes a polygonal connection area.

9. The method for preparing a multi-layer flexible knitted stab-proof fabric according to claim 8, 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.

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